Patent Publication Number: US-2017353863-A1

Title: Resource Management Method and Radio Access Network Node

Description:
TECHNICAL FIELD 
     The present disclosure relates to the technical field of mobile communication, in particular to a resource management method and a radio access network node. 
     BACKGROUND 
     As predicted, in future 10 years, the amount of radio mobile services will increase by thousands of times. However, the current cellular radio access network based on macro cells obviously cannot provide an enough great capacity to satisfy such huge mobile service demand. At present, Ultra Dense Network (UDN) is considered by the industry as a main drive which can satisfy such huge service demand. UDN may be deployed indoor and outdoor hotspot areas or any areas in which there is a great service amount demand, e.g., densely populated residential areas, office buildings, shopping centers, stadiums, large open public places, airports, transportation hubs, etc. 
     UDN increases the network capacity by increasing the deployment density of network nodes, i.e., increasing the network capacity by increasing the deployment density of Radio Access Network nodes (RAN-nodes), meanwhile the dense deployment of radio access network nodes shortens the distance between a user and a radio access network node, such near-field radio communication can guarantee the high reliability of communication links on one hand and can also improve the reuse efficiency of spectrums in areas on the other hand, and thereby the network capacity can be further improved. At the same time, near-field communication between users and radio access network nodes allows millimeter waves to be usable in UDN, rich frequency resources of millimeter waves provide greater bandwidth for UDN and thereby the network capacity is further improved. Radio access network nodes are access network devices which can allow user equipment to access to a network through radio communication links. For example, NodeB (eNB), Lower Power Nodes (LPNs), Access Points (APs) and the like are all radio access network nodes. 
     UDN can improve the network capacity. When the network capacity is improved, the network in future does not want to increase Capital Expenditure (CAPEX) and Operating Expense (OPEX). This means that the deployment of UDN needs to decrease artificial planning, optimization and management, flexible and quick deployment can be completed in indoor and outdoor hotspot areas or areas in which there is a great service amount according to network topology, network load, service demand and the like, and self-configuration, self-optimization and self-healing can be realized. In order to realize all of these goals, the industry generally considers that UDN needs to use wireless backhaul, i.e., different from radio access network nodes of the existing network which generally access to core network devices and realize communication between radio access network nodes through wired connection (e.g., optical fibers, cables, etc.), the communication between radio access network nodes and even the access to core network devices are realized through wireless connection. 
     Wireless backhaul links can use frequency resources which are the same as or different from frequency resources used by radio access links, i.e., links for user equipment to access to access network devices through radio communication links, and coexistence of a great amount of wireless backhaul links and radio access links in UDN poses a challenge of how to perform resource management between links and how to solve the problem of interference between links. 
     SUMMARY 
     Embodiments of the present disclosure provide a resource management method and a radio access network node, which are used for solving the problem of interference between links when a great amount of wireless backhaul links and radio access links coexist in an ultra dense network. 
     In order to solve the above-mentioned problem, the embodiment of the present disclosure provides a resource management method, applied to an ultra dense network at least including a first radio access network node and a second radio access network node, herein the first radio access network node is provided with a wired interface and accesses to a resource coordination center through the wired interface, and the second radio access network node communicates with the first radio access network node through a wireless interface; the method includes: 
     the second radio access network node searching for the first radio access network node; and the second radio access network node acquiring, from the first radio access network node, a first resource pattern and a second resource pattern allocated to the second radio access network node for use, herein the first resource pattern is used for a radio access link for communication between the second radio access network node and user equipment, and the second resource pattern is used for a wireless backhaul link for communication between the second radio access network node and the first radio access network node. 
     In an exemplary embodiment, before the second radio access network node acquires, from the first radio access network node, two resource patterns allocated to the second radio access network node for use, the method further includes: the second radio access network node receiving a shared resource pattern broadcasted by the first radio access network node; and the second radio access network node initially accessing to the first radio access network node by using the shared resource pattern. 
     In an exemplary embodiment, the two resource patterns are resource patterns which are not used by other radio access network nodes in a preset range of the second radio access network node, or resource patterns which are used by other radio access network nodes in a preset range of the second radio access network node but are allowed to be shared by a plurality of radio access network nodes. 
     In an exemplary embodiment, the second radio access network node acquiring, from the first radio access network node, the two resource patterns allocated to the second radio access network node for use includes: the first radio access network node receiving the two resource patterns allocated by the resource coordination center to which the first radio access network node accesses, and transmitting the two resource patterns to the second radio access network node; or the first radio access network node receiving a resource pattern set allocated by the resource coordination center to which the first radio access network node accesses, selecting, from the resource pattern set, two resource patterns and transmitting the two resource patterns to the second radio access network node. 
     In an exemplary embodiment, the shared resource pattern is used for shared use when the second radio access network node which communicates with the first radio access network node through the wireless interface initially accesses to the first radio access network node. 
     In an exemplary embodiment, the second radio access network node searches for the first radio access network node by searching for a specific discovery signal of the first radio access network node; and the specific discovery signal of the first radio access network node is different from discovery signals of second radio access network nodes in the ultra dense network and is transmitted on a dedicated time domain or frequency domain resource for the first radio access network node. 
     In an exemplary embodiment, a resource pattern includes one of the following: 
     resources which are allocated on a whole system band in frequency domain but are periodically and non-continuously allocated in time domain; or 
     resources which are continuously allocated in time domain but are only allocated on partial bands in frequency domain; or 
     resources which are non-continuously allocated in time domain but are only allocated on partial bands at non-continuously allocated time periods. 
     In an exemplary embodiment, the second radio access network node acquiring, from the first radio access network node, the two resource patterns allocated to the second radio access network node for use includes: 
     the second radio access network node receiving a resource pattern set broadcasted by the first radio access network node and determining, from the resource pattern set, two resource patterns which are used by the second radio access network node. 
     In an exemplary embodiment, the second radio access network node receiving the resource pattern set broadcasted by the first radio access network node and determining, from the resource pattern set, the two resource patterns which are used by the second radio access network node includes: 
     the second radio access network node receiving a resource pattern set broadcasted by the first radio access network node, herein the resource pattern set includes resource patterns which are used for the wireless backhaul link of the second radio access network node and resource patterns which are used for the radio access link of the second radio access network node, provided to the second radio access network node for use; and the second radio access network node determining, from the resource pattern set, two resource patterns which are not used by other radio access network nodes in a preset range of the second radio access network node or two resource patterns which have already been used by other radio access network nodes in a preset range of the second radio access network node but are allowed to be shared by a plurality of radio access network nodes; 
     or, 
     the second radio access network node receiving a first resource pattern set and a second resource pattern set broadcasted by the first radio access network node, herein the first resource pattern set includes resource patterns which are provided to the second radio access network node for use and are used for the wireless backhaul link of the second radio access network node; and the second resource pattern set includes resource patterns which are provided to the second radio access network node for use and are used for the radio access link of the second radio access network node; and the second radio access network node determining, from the first pattern set, one resource pattern which is not used by radio access network nodes in a preset range of the second radio access network node or one resource pattern which has already been used by other radio access network nodes in a preset range of the second radio access network node but is allowed to be shared by a plurality of radio access network nodes, and determining, from the second pattern set, one resource pattern which is not used by other radio access network nodes in a preset range of the second radio access network node or one resource pattern which has already been used by other radio access network nodes in a preset range of the second radio access network node but is allowed to be shared by a plurality of radio access network nodes. 
     In an exemplary embodiment, determining a resource pattern which is not used by other radio access network nodes in the preset range of the second radio access network node or a resource pattern which has already been used by other radio access network nodes in the preset range of the second radio access network node but is allowed to be shared by a plurality of second radio access network nodes includes: 
     the second radio access network node monitoring broadcast of other radio access network nodes in a preset range in preset time Tm and determining a resource pattern which is used by other radio access network nodes in the preset range; and the second radio access network node selecting, from a resource pattern set broadcasted by the first radio access network node, a resource pattern which is not used by other radio access network nodes in the preset range of the second radio access network node or a resource pattern which has already been used by other radio access network nodes in the preset range of the second radio access network node but is allowed to be shared by a plurality of radio access network nodes; 
     or, 
     the first radio access network node determining a resource pattern which has already been used by the second radio access network node in a coverage range of the first radio access network node, and removing, from the broadcasted resource pattern set, the resource pattern which has already been used but is not allowed to be shared by a plurality of second radio access network nodes; and the second radio access network node selecting, from the resource pattern set broadcasted by the first radio access network node, a resource pattern. 
     In an exemplary embodiment, after the second radio access network node determines a resource pattern which is not used by radio access network nodes in the preset range of the second radio access network node or a resource pattern which has already been used by radio access network nodes in the preset range of the second radio access network node but is allowed to be shared by a plurality of radio access network nodes, the method further includes: 
     the second radio access network node broadcasting the resource pattern determined by the second radio access network node. 
     In an exemplary embodiment, the first radio access network node determining a resource pattern which has already been used by the second radio access network node in the coverage range of the first radio access network node includes: 
     the first radio access network node receiving broadcast of a plurality of second radio access network nodes in the coverage range of the first radio access network node, herein the broadcast contains resource patterns selected by the second radio access network nodes. 
     In an exemplary embodiment, the method further includes: 
     if the second radio access network node does not find, from the resource pattern set broadcasted by the first radio access network node, a resource pattern which is not used by radio access network nodes in the preset range of the second radio access network node, and does not find a resource pattern which has already been used by radio access network nodes in the preset range of the second radio access network node but is allowed to be shared by a plurality of radio access network nodes, the second radio access network node searching for other first radio access network nodes except the first radio access network node. 
     In an exemplary embodiment, the resource pattern set is allocated by the resource coordination center and then is transmitted to the first radio access network node. 
     A radio access network node includes: a wireless backhaul module and a radio access module, herein, 
     the wireless backhaul module is arranged to: 
     search for a first radio access network node; acquire, from the first radio access network node, a first resource pattern and a second resource pattern allocated to the radio access network node, i.e., a second radio access network node for use, herein the first resource pattern is used for a radio access link for communication between the second radio access network node and user equipment, and the second resource pattern is used for a wireless backhaul link for communication between the second radio access network node and the first radio access network node; and communicate with the first radio access network node by using the second resource pattern, herein the first radio access network node is provided with a wired interface and accesses to a resource coordination center through the wired interface; and the radio access function module is arranged to: communicate with user equipment by using the second resource pattern. 
     In an exemplary embodiment, the wireless backhaul module includes an access point search module, a broadcast receiving module and an access and configuration receiving function module; the access point search function module is arranged to: search for the first radio access network node; the broadcast receiving function module is arranged to: receive a shared resource pattern broadcasted by the first radio access network node; and the access and configuration receiving function module is arranged to: initially access to the first radio access network node by using the shared resource pattern; and acquire, from the first radio access network node, the first resource pattern and the second resource pattern allocated to the second radio access network node for use. 
     In an exemplary embodiment, the wireless backhaul module includes an access point search module, a broadcast receiving and transmitting module and a resource pattern function module. 
     The access point search module is arranged to: search for the first radio access network node; the broadcast receiving and transmitting module is arranged to: receive a resource pattern set broadcasted by the first radio access network node, herein the resource pattern set includes resource patterns which are used for the wireless backhaul link of the second radio access network node and resource patterns which are used for the radio access link of the second radio access network node, provided to the second radio access network node for use; or arranged to: receive a first resource pattern set and a second resource pattern set broadcasted by the first radio access network node, herein the first resource pattern set includes resource patterns which are provided to the second radio access network node for use and are used for the wireless backhaul link of the second radio access network node. 
     The second resource pattern set includes resource patterns which are provided to the second radio access network node for use and are used for the radio access link of each second radio access network node. 
     The resource pattern selection function module is arranged to: determine, from the resource pattern set, two resource patterns which are not used by radio access network nodes in a preset range of the second radio access network node or two resource patterns which have already been used by radio access network nodes in a preset range of the second radio access network node but are allowed to be shared by a plurality of radio access network nodes, herein one resource pattern is used for the radio access link for communication between the second radio access network node and the user equipment, and the other resource pattern is used for the wireless backhaul link for communication between the second radio access network node and the first radio access network node; 
     or arranged to: determine, from the first pattern set, one resource pattern which is not used by radio access network nodes in a preset range of the second radio access network node or one resource pattern which has already been used by radio access network nodes in a preset range of the second radio access network node but is allowed to be shared by a plurality of radio access network nodes, and determine, from the second pattern set, one resource pattern which is not used by radio access network nodes in a preset range of the second radio access network node or one resource pattern which has already been used by radio access network nodes in a preset range of the second radio access network node but is allowed to be shared by a plurality of radio access network nodes. 
     In an exemplary embodiment, the broadcast receiving and transmitting module is further arranged to: monitor broadcast of other radio access network nodes in a preset range in preset time Tm and determine a resource pattern which is used by other radio access network nodes in the preset range. 
     In an exemplary embodiment, the broadcast receiving and transmitting module is further arranged to: broadcast the determined resource pattern. 
     In an exemplary embodiment, the access point search module is further arranged to: if a resource pattern which is not used by radio access network nodes in the preset range of the second radio access network node are is found and a resource pattern which has already been used by radio access network nodes in the preset range of the second radio access network node but is allowed to be shared by a plurality of radio access network nodes is not found from the resource pattern set broadcasted by the first radio access network node, search for other first radio access network nodes except the first radio access network node. 
     In an exemplary embodiment, the access point search module is arranged to: search for the first radio access network node by searching for a specific discovery signal of the first radio access network node; and the specific discovery signal of the first radio access network node is different from a discovery signal of each second radio access network node in the ultra dense network where the first radio access network node is located and is transmitted on a dedicated time domain or frequency domain resource for the first radio access network node. 
     A radio access network node includes a wireless backhaul module and a radio access module, herein the wireless backhaul module includes a discovery signal transmitting module, a broadcast receiving and transmitting module and an available resource pattern update module. 
     The discovery signal transmitting module is arranged to: transmit a discovery signal of the radio access network node, i.e., a first radio access network node, herein the discovery signal is used for a second radio access network node to search for the first radio access network node. 
     The broadcast receiving and transmitting module is arranged to: broadcast one available resource pattern set, herein the available resource pattern set includes resource patterns which are not used by the second radio access network node in a coverage range of the first radio access network node, or resource patterns which have already been used by other radio access network nodes in a coverage range of the first radio access network node but are allowed to be shared by a plurality of radio access network nodes, are provided to the second radio access network node for use, are used for a wireless backhaul link of the second radio access network node and are used for a radio access link of the second radio access network node; 
     or arranged to: broadcast a first available resource pattern set and a second available resource pattern set, herein the first available resource pattern set includes resource patterns which are not used by the second radio access network node in a coverage range of the first radio access network node, or have already been used by other radio access network nodes in a coverage range of the first radio access network node but are allowed to be shared by a plurality of radio access network nodes, are provided to the second radio access network for use and are used for a wireless backhaul link of the second radio access network node; and the second available resource pattern set includes resource patterns which are not used by the second radio access network node in a coverage range of the first radio access network node or have already been used by other radio access network nodes in a coverage range of the first radio access network node but are allowed to be shared by a plurality of radio access network nodes, are provided to the second radio access network for use and are used for a radio access link of the second radio access network node. 
     The available resource pattern update module is arranged to: acquire, from a resource coordination center, a resource pattern set which can be allocated to and used by the first radio access network node, determine a resource pattern which has already been used by other radio access network nodes in the coverage range of the first radio access network node, remove, from the resource pattern set acquired from the resource coordination center, the resource pattern which has already been used and is not allowed to be shared by a plurality of second radio access network nodes, and generate an available resource pattern set. 
     The radio access module is arranged to: communicate with user equipment by using a resource pattern which is allocated by the resource coordination center and is used for a radio access link of the first radio access network node. 
     The wireless backhaul module is arranged to: communicate with each second radio access network node in the coverage range of the first radio access network node on a resource pattern which is determined by the second radio access network node and is used for the wireless backhaul link between the second radio access network node and the first radio access network node. 
     Herein the first radio access network node is provided with a wired interface and accesses to the resource coordination center through the wired interface, and the second radio access network node communicates with the first radio access network node through a wireless interface. 
     In an exemplary embodiment, the broadcast receiving and transmitting module is further arranged to: receive broadcast of second radio access network nodes in the coverage range of the first radio access network node, herein the broadcast contains resource patterns selected by the second radio access network nodes. 
     A computer-readable storage medium, storing program instructions, which, when executed, are capable of implementing the above-mentioned method. 
     The embodiments of the present disclosure enable wireless backhaul links and radio access links of radio access network nodes to coexist without causing interference, and effectively realize the resource management between all links in an ultra dense network. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  illustrates a schematic diagram of a network topology of a UDN access network. 
         FIG. 2  illustrates a schematic diagram of an interference situation  1  between wireless backhaul links and radio access links. 
         FIG. 3  illustrates a schematic diagram of an interference situation  2  between wireless backhaul links and radio access links. 
         FIG. 4  illustrates a flowchart of a resource management method according to an embodiment of the present disclosure. 
         FIG. 5  illustrates a flowchart of a resource management method according to an embodiment of the present disclosure. 
         FIG. 6  illustrates a flowchart of a resource management method according to an embodiment of the present disclosure. 
         FIG. 7  illustrates an implementation flowchart of a resource management method according to embodiment one of the present disclosure. 
         FIG. 8  illustrates a schematic diagram of design of an RCCa-AP specific discovery signal according to embodiment one of the present disclosure. 
         FIG. 9  illustrates a schematic diagram of design of another RCCa-AP specific discovery signal according to embodiment one of the present disclosure. 
         FIG. 10  illustrates a schematic diagram of transmitting directions of a directional antenna according to embodiment one of the present disclosure. 
         FIG. 11  illustrates an exemplary diagram of resource patterns according to embodiment one of the present disclosure. 
         FIG. 12  illustrates a structural schematic diagram of a resource management device provided by embodiment one of the present disclosure. 
         FIG. 13  illustrates a structural schematic diagram of another resource management device provided by embodiment one of the present disclosure. 
         FIG. 14  illustrates a schematic diagram of a network topology of a UDN access network according to embodiment two and embodiment three. 
         FIG. 15  illustrates an implementation flowchart of a resource management method according to embodiment two of the present disclosure. 
         FIG. 16  illustrates a broadcast transmitting and receiving sequence diagram of APs according to embodiment two. 
         FIG. 17  illustrates a structural schematic diagram of a resource management device provided by embodiment two and embodiment three of the present disclosure. 
         FIG. 18  illustrates an implementation flowchart of a resource management method according to embodiment three of the present disclosure. 
         FIG. 19  illustrates a broadcast transmitting/receiving sequence diagram of AP 1  and RCCa-AP according to embodiment three of the present disclosure. 
         FIG. 20  illustrates a structural schematic diagram of another resource management device provided by embodiment three of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     In order to enable the purposes, technical solution and advantages of the present disclosure to be clearer, the present disclosure will be alternatively described below in detail with reference to the accompanying drawings. 
       FIG. 1  illustrates a network topology structure of an exemplary access network of a UDN, herein  120 - 1  to  120 - 7  are radio access network nodes which are densely deployed in a certain area, and  110 - 1  and  110 - 2  are Resource Coordination Centers (RCCs). In order to not increase the Capital Expenditure (CAPEX) and the Operating Expense (OPEX) of UDN deployment and realize flexible and rapid deployment of UDN, in the seven radio access network nodes,  120 - 2  and  120 - 5  may respectively access to the resource coordination centers  110 - 2  and  110 - 1  through wired interfaces  130 - 2  and  130 - 1 , and the seven radio access network nodes may communicate with surrounding radio access network nodes through wireless interfaces ( 140 - 1  to  140 - 9 ). 
     The resource coordination centers ( 110 - 1  and  110 - 2 ) as illustrated in  FIG. 1  are responsible for the management and coordination of radio resources of radio access network nodes in a certain area, including resource management and coordination of radio access links and wireless backhaul links. A resource coordination center is a logical function entity. During physical implementation, the resource coordination center may be implemented on the existing access network device (e.g., a macro base station), may also be implemented by newly adding independent physical software and hardware devices, and may also be implemented on a specific resource coordination center accessible node. 
     The wired interfaces ( 130 - 1  and  130 - 2 ) as illustrated in  FIG. 1  may use wired mediums such as copper and optical fibers to realize interfaces for connection between the resource coordination center accessible nodes and the resource coordination centers. 
     The wireless interfaces ( 140 - 1  to  140 - 9 ) as illustrated in  FIG. 1  may use wireless air interfaces to realize wireless backhaul interfaces for communication between the resource coordination center accessible nodes. 
     In the schematic diagram of the network topology of the UDN access network as illustrated in  FIG. 1 , a plurality of radio access network nodes are densely deployed in a certain area. On one hand, these radio access network nodes are provided with radio access modules and can communicate with user equipment. On the other hand, these radio access network nodes are provided with wireless backhaul modules and can communicate with other radio access network nodes. Since dense deployment is used and a radio access network node is provided with two links simultaneously, i.e., a radio access link and a wireless backhaul link, a great number of wireless backhaul links and radio access links coexist in an ultra dense network. If the wireless backhaul links and the radio access links share the same resources, inevitably interference as illustrated in  FIG. 2  and  FIG. 3  will be caused. 
     A radio access network node  210  as illustrated in  FIG. 2  is provided with a radio access module  210 - 2  and a wireless backhaul module  210 - 1  simultaneously. The radio access module  210 - 2  receives data from User Equipment (UE)  220  through a radio access link  230 - 3  and transmits data to UE through a radio access link  230 - 4 . The wireless backhaul module  210 - 1  transmits data to a resource coordination center accessible node  200  through a wireless backhaul link  230 - 1  and receives data from the resource coordination center accessible node  200  through a wireless backhaul link  230 - 2 . The radio access links  230 - 3  and  230 - 4  may be an identical link which uses the same frequency in actual physical links. Similarly, the wireless backhaul links  230 - 1  and  230 - 2  may also be an identical link which uses the same frequency in actual physical links. In  FIG. 2 , in order to clearly describe the problem of interference, the links are thus separately expressed as different links. When the wireless backhaul links and the radio access links share the same resources, signals transmitted on the radio access link  230 - 4  of AP 1  may interfere with signals received on the wireless backhaul link  230 - 2 ; and similarly signals transmitted on the wireless backhaul link  230 - 1  of AP 1  may also interfere with signals received on the radio access link  230 - 3 . 
     A radio access network node  310  as illustrated in  FIG. 3  is provided with a radio access module  310 - 2  and a wireless backhaul module  310 - 1  simultaneously. The radio access module  310 - 2  receives data from User Equipment (UE)  320  through a radio access link  330 - 3  and transmits data to UE through a radio access link  330 - 4 . The wireless backhaul module  310 - 1  transmits data to a radio access network node  300  through a wireless backhaul link  330 - 1  and receives data from the radio access network node  300  through a wireless backhaul link  330 - 2 . The radio access links  330 - 3  and  330 - 4  may be an identical link which uses the same frequency in actual physical links. Similarly, the wireless backhaul links  330 - 1  and  330 - 2  may also be an identical link which uses the same frequency in actual physical links. In  FIG. 3 , in order to clearly describe the problem of interference, the links are thus separately expressed as different links. When the wireless backhaul links and the radio access links share the same resources, the radio access link  330 - 4  and the wireless backhaul link  330 - 2  of AP 1  simultaneously transmit data, the signals transmitted by the both links may be received by a receiving end AP 2  or UE and thereby interference is caused to the receiving end; and similarly, when the radio access link  330 - 3  of AP 1  receives data from UE, the radio access link  330 - 3  may receive data from the wireless backhaul link  330 - 1  at the same time and thereby interference is caused, and vice versa, i.e., when the wireless backhaul link  330 - 1  of AP 1  receives data from AP 2 , the wireless backhaul link  330 - 1  may receive data from the radio access link  330 - 3  at the same time and thereby interference is caused. 
     The embodiment of the present disclosure provides a resource management method, applied to an ultra dense network as illustrated in  FIG. 1  at least including a first radio access network node and a second radio access network node, herein the first radio access network node is provided with a wired interface and accesses to a resource coordination center through the wired interface, and the second radio access network node communicates with the first radio access network node through a wireless interface; the method includes: 
     the second radio access network node searching for the first radio access network node; 
     the second radio access network node receiving a shared resource pattern broadcasted by the first radio access network node; 
     the second radio access network node initially accessing to the first radio access network node by using the shared resource pattern; and 
     the second radio access network node acquiring, from the first radio access network node, two resource patterns allocated to the second radio access network node for use, 
     herein one resource pattern is used for a radio access link for communication between the second radio access network node and user equipment, and the other resource pattern is used for a wireless backhaul link for communication between the second radio access network node and the first radio access network node. 
     In an embodiment, the two resource patterns are resource patterns which are not used by radio access network nodes in a preset range of the second radio access network node, or resource patterns which are used by radio access network nodes in a preset range of the second radio access network node but are allowed to be shared by a plurality of radio access network nodes. 
     In an embodiment, the second radio access network node acquiring, from the first radio access network node, the two resource patterns allocated to the second radio access network node for use includes: 
     the first radio access network node receiving the two resource patterns allocated by the resource coordination center to which the first radio access network node accesses, and transmitting the two resource patterns to the second radio access network node; or 
     the first radio access network node receiving a resource pattern set allocated by the resource coordination center to which the first radio access network node accesses, selecting, from the resource pattern set, two resource patterns and transmitting the two resource patterns to the second radio access network node. 
     In an embodiment, the shared resource pattern is used for shared use when the second radio access network node which communicates with the first radio access network node through the wireless interface initially accesses to the first radio access network node. 
     Aiming at the first resource management method provided by the embodiment of the present disclosure, the first resource management method will be described below in detail with reference to the flowchart illustrated in  FIG. 4 . As illustrated in  FIG. 4 , the resource management method includes the following steps. 
     In step  410 , a second radio access network node AP ( 120 - 1 ,  120 - 3 ,  120 - 4 ,  120 - 6 ,  120 - 7 ) searches for a first radio access network node (resource coordination center accessible node) RCCa-AP ( 120 - 2  and  120 - 5 ) which is provided with wired interface and accesses to a resource coordination center through the wired interface. 
     After the AP searches out the RCCa-AP, 
     in step  420 , the AP receives shared resource patterns, i.e., a resource pattern  1  and a resource pattern  2 , broadcasted by the RCCa-AP. 
     The RCCa-AP has a capability of communicating with user equipment through a radio access link on one hand, and has a capability of communicating with other APs through a wireless backhaul link on the other hand, herein the resource pattern  1  is used for an initial wireless backhaul link when an AP accesses to the RCCa-AP and is shared when an AP which expects to communicate with the RCCa-AP initially accesses to the RCCa-AP; and the resource pattern  2  is used for a radio access link for the RCCa-AP and is shared by the user equipment which accesses to the RCCa-AP. 
     The above-mentioned two resource patterns broadcasted by the RCCa-AP are allocated by the resource Coordination Center (RCC) and then are transmitted to the RCCa-AP through the wired interface between the RCCa-AP and the RCC. 
     In step  430 , the AP accesses to the RCCa-AP on a resource of the resource pattern  1 . 
     After the AP successfully accesses to the RCCa-AP, 
     in step  440 , the AP acquires, from the RCCa-AP, resource patterns for the wireless backhaul link and the radio access link which are respectively allocated to the AP for use. 
     Herein, the resource patterns for the wireless backhaul link and the radio access link which are allocated to the AP for use are resource patterns which are not used or have already been used but are allowed to be shared by a plurality of APs. Here, the situation that the resource patterns are used refers to that the resource patterns are used by the RCCa-AP or accessing (accessing to the RCCa-AP) APs in an area (e.g., an RCCa-AP coverage area). The allocated resource patterns are allocated by the Resource Coordination Center (RCC) and then are transmitted to the RCCa-AP through the wired interface between the RCCa-AP and the RCC, or are selected by the RCCa-AP from a resource pattern set which is allocated by the RCC and is transmitted to the RCCa-AP through the wired interface between the RCCa-AP and the RCC. 
     The embodiment of the present disclosure provides another resource management method, applied to an ultra dense network as illustrated in  FIG. 1  at least including a first radio access network node and a second radio access network node, herein the first radio access network node is provided with a wired interface and accesses to a resource coordination center through the wired interface, and the second radio access network node communicates with the first radio access network node through a wireless interface; the method includes: 
     the second radio access network node searching for the first radio access network node; 
     the second radio access network node receiving a resource pattern set broadcasted by the first radio access network node, herein the resource pattern set includes resource patterns which are provided to the second radio access network node for use, are used for the wireless backhaul link of the second radio access network node and are used for the radio access link of the second radio access network node; and 
     the second radio access network node determining, from the resource pattern set, two resource patterns which are not used by radio access network nodes in a preset range of the second radio access network node or two resource patterns which have already been used by radio access network nodes in a preset range of the second radio access network node but are allowed to be shared by a plurality of radio access network nodes, herein one resource pattern is used for the radio access link for communication between the second radio access network node and the user equipment, and the other resource pattern is used for the wireless backhaul link for communication between the second radio access network node and the first radio access network node; 
     or, 
     the second radio access network node receiving a first resource pattern set and a second resource pattern set broadcasted by the first radio access network node, herein the first resource pattern set includes resource patterns which are provided to the second radio access network node for use and are used for the wireless backhaul link of the second radio access network node; and the second resource pattern set includes resource patterns which are provided to the second radio access network node for use and are used for the radio access link of the second radio access network node; and 
     the second radio access network node determining, from the first pattern set, one resource pattern which is not used by radio access network nodes in a preset range of the second radio access network node or one resource pattern which has already been used by radio access network nodes in a preset range of the second radio access network node but is allowed to be shared by a plurality of radio access network nodes, and determining, from the second pattern set, one resource pattern which is not used by radio access network nodes in a preset range of the second radio access network node or one resource pattern which has already been used by radio access network nodes in a preset range of the second radio access network node but is allowed to be shared by a plurality of radio access network nodes. 
     In an embodiment, determining a resource pattern which is not used by radio access network nodes in the preset range of the second radio access network node or a resource pattern which has already been used by radio access network nodes in the preset range of the second radio access network node but is allowed to be shared by a plurality of radio access network nodes includes: 
     the second radio access network node monitoring broadcast of other radio access network nodes in a preset range in preset time Tm and determining a resource pattern which is used by other radio access network nodes in the preset range; and 
     the second radio access network node selecting, from a resource pattern set broadcasted by the first radio access network node, a resource pattern which is not used by radio access network nodes in the preset range of the second radio access network node or a resource pattern which has already been used by radio access network nodes in the preset range of the second radio access network node but is allowed to be shared by a plurality of radio access network nodes; 
     or, 
     the first radio access network node determining a resource pattern which has already been used by the second radio access network node in a coverage range of the first radio access network node, and removing, from the broadcasted resource pattern set, the resource pattern which has already been used but is not allowed to be shared by a plurality of second radio access network nodes; and 
     the second radio access network node selecting, from the resource pattern set broadcasted by the first radio access network node, a resource pattern. 
     In an embodiment, after the second radio access network node determines a resource pattern which is not used by radio access network nodes in the preset range of the second radio access network node or a resource pattern which has already been used by radio access network nodes in the preset range of the second radio access network node but is allowed to be shared by a plurality of radio access network nodes, the method further includes: 
     the second radio access network node broadcasting the selected resource pattern. 
     In an embodiment, the first radio access network node determining a resource pattern which has already been used by the second radio access network node in the coverage range of the first radio access network node includes: 
     the first radio access network node receiving broadcast of second radio access network nodes in the coverage range of the first radio access network node, herein the broadcast contains resource patterns selected by the second radio access network nodes. 
     In an embodiment, the method further includes: 
     if the second radio access network node does not find, from the resource pattern set broadcasted by the first radio access network node, a resource pattern which is not used by radio access network nodes in the preset range of the second radio access network node, and does not find a resource pattern which has already been used by radio access network nodes in the preset range of the second radio access network node but is allowed to be shared by a plurality of radio access network nodes, the second radio access network node searching for other first radio access network nodes except the first radio access network node. 
     In an embodiment, the resource pattern set is allocated by the resource coordination center and then is transmitted to the first radio access network node. 
     Aiming at the above-mentioned second resource management method provided by the embodiment of the present disclosure, the second resource management method will be described below with reference to the flowcharts illustrated in  FIG. 5  and  FIG. 6 . 
     As illustrated in  FIG. 5 , the resource management method includes the following steps: 
     In step  510 , an AP searches for an RCCa-AP. 
     After the AP searches out the RCCa-AP, 
     in step  520 , the AP receives one resource pattern set broadcasted by the RCCa-AP, herein the resource pattern set includes resource patterns which are provided to the AP, which can access to the RCCa-AP through a wireless backhaul link, for use, are used for the wireless backhaul link of the AP and are used for the radio access link of the AP; or the AP receives two resource pattern sets, i.e., a resource pattern set  1  and a resource pattern set  2  broadcasted by the RCCa-AP, herein the resource pattern set  1  includes resource patterns which are provided to the AP, which can access to the RCCa-AP through the wireless backhaul link, for use, and are used for the wireless backhaul link of the AP; and the resource pattern set  2  includes resource patterns which are provided to the AP, which can access to the RCCa-AP through the wireless backhaul link, for use, and are used for the radio access link of the AP. 
     In step  530 , the AP monitors broadcast of surrounding APs in preset time Tm and determines resource patterns used by the surrounding APs, i.e., determines resource patterns for the wireless backhaul link and the resource patterns for the radio access link, which are used by APs in a preset range (here, the APs in the preset range may include surrounding APs which can be monitored by the AP or APs which are determined by other means). 
     Herein, Tm is a time during which the AP periodically monitors and receives broadcast of APs in the preset range, and a time length thereof is agreed by a system or is broadcasted by the RCCa-AP. 
     In step  540 , the AP selects, from the resource pattern set broadcasted by the RCCa-AP, two resource patterns which are not used by the surrounding APs or two resource patterns which have already been used by the surrounding APs but are allowed to be shared by a plurality of APs, herein one resource pattern is used for a radio access link of the AP and other resource pattern is used for a wireless backhaul link of the AP. Here, the situation that the resource patterns are used refers to that the resource patterns are used by APs, which have accessed to the RCCa-AP, surrounding the AP. 
     Herein, if, in step  520 , the RCCa-AP broadcasts one resource pattern set, the AP selects, from the one resource pattern set, two resource patterns which are not used by the surrounding APs or have already been used by the surrounding APs but are allowed to be shared by a plurality of APs. The situation that the two resource patterns are not used by the surrounding APs refers to that the two resource patterns are not used by the surrounding APs for the wireless backhaul link and are not used by the surrounding APs for the radio access link. 
     Herein, if, in step  520 , the RCCa-AP broadcasts two resource pattern sets, the AP selects, from the resource pattern set  1 , one resource pattern which is not used by the surrounding APs or has already been used by the surrounding APs but is allowed to be shared by a plurality of APs and is used for the wireless backhaul ink of the AP, and selects, from the resource pattern set  2 , one resource pattern which is not used by the surrounding APs or has already been used by the surrounding APs but is allowed to be shared by a plurality of APs and is used for the radio access link of the AP. 
     In step  550 , the AP broadcasts the two selected resource patterns starting from a next period Tm. 
     In step  560 , if there is no resource pattern which is allowed to be shared by APs, the method may further include the following steps: if, in step  540 , the AP cannot find a resource pattern which is not used by the surrounding APs from the resource pattern set broadcasted by the RCCa-AP, the AP searches for other RCCa-APs again. 
     Herein, if, in step  520 , the RCCa-AP broadcasts one resource pattern set and the AP cannot find two resource patterns which are not used by the surrounding APs from the resource pattern set broadcasted by the RCCa-AP, the AP searches for other RCCa-APs again. 
     Herein, if, in step  520 , the RCCa-AP broadcasts two resource pattern sets and the AP cannot find a resource pattern which is not used by the surrounding APs from the resource pattern set  1  or cannot find a resource pattern which is not used by the surrounding APs from the resource pattern set  2 , the AP searches for other RCCa-APs again. 
     Step  560  is an alternative step. 
       FIG. 6  illustrates an improved version of the method illustrated in  FIG. 5 . The improved method includes the following steps. 
     In step  610 , an AP searches for an RCCa-AP. 
     After the AP searches out the RCCa-AP, 
     in step  620 , the AP receives an available resource pattern set broadcasted by the RCCa-AP, herein the available resource pattern set includes available resource patterns which are not used by accessing (accessing to the RCCa-AP) APs in an area (e.g., an RCCa-AP coverage area), or have already been used by accessing APs in the area but are allowed to be shared by a plurality of APs, are provided to the APs, which can access to the RCCa-AP through a wireless backhaul link, for use, are used for the wireless backhaul link of the APs and are used for the radio access link of the APs; or 
     the AP receives two available resource pattern sets, i.e., an available resource pattern set  1  and an available resource pattern set  2  broadcasted by the RCCa-AP, herein the available resource pattern set  1  includes available resource patterns which are not used by accessing (accessing to the RCCa-AP) APs in an area (e.g., an RCCa-AP coverage area), or have already been used by accessing APs in the area but are allowed to be shared by a plurality of APs, are provided to the APs, which can access to the RCCa-AP through a wireless backhaul link, for use, and are used for the wireless backhaul link of the APs; and the available resource pattern set  2  includes available resource patterns which are not used by accessing (accessing to the RCCa-AP) APs in an area (e.g., an RCCa-AP coverage area), or have already been used by accessing APs in the area but are allowed to be shared by a plurality of APs, are provided to the APs, which can access to the RCCa-AP through a wireless backhaul link, for use, and are used for the radio access link of the APs. 
     In step  630 , the AP selects, from the available resource pattern set broadcasted by the RCCa-AP, two available resource patterns, one available resource pattern is used for a radio access link and the other available resource pattern is used for a wireless backhaul link. 
     Herein, if, in step  620 , the RCCa-AP broadcasts two available resource pattern sets, the AP selects, from the available resource pattern set  1 , an available resource pattern which is used for the wireless backhaul ink of the AP, and selects, from the available resource pattern set  2 , an available resource pattern which is used for the radio access link of the AP. 
     In step  640 , the AP broadcasts the two selected available resource patterns. 
     Step  640  is an alternative step, i.e., when the RCCa-AP can detect the available resource patterns which are specifically selected and used by the AP through a blind detection process of a layer  1  (physical layer), the AP may not need to broadcast the two selected available resource patterns. 
     In step  650 , the RCCa-AP receives the two available resource patterns broadcasted by the AP. 
     The RCCa-AP may detect the two available resource patterns which are specifically selected and used by the AP through the blind detection process of the layer  1  (physical layer). For example, the RCCa-AP may determine the available resource patterns which are specifically selected and used by the AP through pilot signal energy detection. 
     In step  660 , the RCCa-AP updates the available resource pattern set and broadcasts the updated available resource pattern set. 
     Herein, the operation that the RCCa-AP updates the available resource pattern set may refer to that the RCCa-AP deletes the two available resource patterns which are broadcasted by the AP and received in step  650  from the available resource pattern set which is broadcasted before (i.e., corresponding to step  620  that the AP receives the broadcast and the RCCa-AP broadcasts the available resource pattern set), herein, if the RCCa-AP broadcasts two available resource pattern sets before, the RCCa-AP respectively deletes one resource pattern corresponding to the two available resource pattern sets broadcasted by the AP from the two available resource pattern sets respectively; and if, in step  650 , the two available resource patterns received by the RCCa-AP and broadcasted by the AP are resource patterns which are allowed to be shared by a plurality of APs, the RCCa-AP updates the available resource pattern set and may not perform the above-mentioned deletion operation. 
     It needs to be stated that, in step  650 , the RCCa-AP receives the broadcast of the AP, the RCCa-AP receives the broadcast from the APs in the area (e.g., the RCCa-AP coverage area) in one broadcast period of the RCCa-AP, and in step  660 , after the broadcast is received, the RCCa-AP broadcasts the updated available resource pattern set starting from a next broadcast period of the RCCa-AP. 
     In the two resource management methods provided by the embodiment of the present disclosure, the second radio access network node searches for the first radio access network node by searching for a specific discovery signal of the first radio access network node. 
     The specific discovery signal of the first radio access network node is different from discovery signals of second radio access network nodes in the ultra dense network and is transmitted on a dedicated time domain or frequency domain position for the first radio access network node. 
     A resource pattern includes one of the following: 
     resources which are allocated on a whole system band in frequency domain but are periodically and non-continuously allocated in time domain; or 
     resources which are continuously allocated in time domain but are only allocated on partial bands in frequency domain; or 
     resources which are non-continuously allocated in time domain but are only allocated on partial bands at non-continuously allocated time periods. 
     The embodiment of the present disclosure provides a resource management device, configured on a second radio access network node side, including: a wireless backhaul function and a radio access module, herein the wireless backhaul function module includes an access point search module, a broadcast receiving module and an access and configuration receiving module. 
     The access point search module is arranged to search for a first radio access network node. 
     The broadcast receiving module is arranged to receive a shared resource pattern broadcasted by the first radio access network node. 
     The access and configuration receiving module is arranged to initially access to the first radio access network node by using the shared resource pattern; and acquire, from the first radio access network node, two resource patterns allocated to the second radio access network node for use. 
     The radio access module is arranged to communicate with user equipment by using one resource pattern for a radio access link in the two resource patterns acquired by the access and configuration receiving function module. 
     The wireless backhaul module is arranged to communicate with the first radio access network node by using the other resource pattern for a wireless backhaul link in the two resource patterns acquired by the access and configuration receiving function module. 
     Herein, the first radio access network node is provided with a wired interface and accesses to a resource coordination center through the wired interface, and the second radio access network node communicates with the first radio access network node through a wireless interface. 
     In an embodiment, the access point search module is arranged to search for the first radio access network node by searching for a specific discovery signal of the first radio access network node. 
     The specific discovery signal of the first radio access network node is different from discovery signals of second radio access network nodes in an ultra dense network where the first radio access network node is located and is transmitted on a dedicated time domain or frequency domain position for the first radio access network node. 
     The embodiment of the present disclosure provides another resource management device, set on a second radio access network node side, including: a wireless backhaul module and radio access module, herein the wireless backhaul module includes an access point search module, a broadcast receiving and transmitting module and a resource pattern selection module. 
     The access point search module is arranged to search for a first radio access network node. 
     The broadcast receiving and transmitting module is arranged to receive a resource pattern set broadcasted by the first radio access network node, herein the resource pattern set includes resource patterns which are provided to the second radio access network node for use and are used for a wireless backhaul link of the second radio access network node, and resource patterns which are used for a radio access link of the second radio access network node; or arranged to receive a first resource pattern set and a second resource pattern set broadcasted by the first radio access network node, herein the first resource pattern set includes resource patterns which are provided to the second radio access network node for use and are used for the wireless backhaul link of the second radio access network node; and the second resource pattern set includes resource patterns which are provided to the second radio access network node for use and are used for the radio access link of the second radio access network node. 
     The resource pattern selection module is arranged to determine, from the resource pattern set, two resource patterns which are not used by radio access network nodes in a preset range of the second radio access network node or two resource patterns which have already been used by radio access network nodes in a preset range of the second radio access network node but are allowed to be shared by a plurality of radio access network nodes, herein one resource pattern is used for the radio access link for communication between the second radio access network node and user equipment, and the other resource pattern is used for the wireless backhaul link for communication between the second radio access network node and the first radio access network node; or arranged to determine, from the first pattern set, one resource pattern which is not used by radio access network nodes in a preset range of the second radio access network node or one resource pattern which has already been used by radio access network nodes in a preset range of the second radio access network node but is allowed to be shared by a plurality of radio access network nodes, and determine, from the second pattern set, one resource pattern which is not used by radio access network nodes in a preset range of the second radio access network node or one resource pattern which has already been used by radio access network nodes in a preset range of the second radio access network node but is allowed to be shared by a plurality of radio access network nodes. 
     The radio access module is arranged to communicate with user equipment by using one resource pattern for the radio access link determined by the resource pattern selection function module. 
     The wireless backhaul module is arranged to communicate with the first radio access network node by using the other resource pattern for the wireless backhaul link determined by the resource pattern selection function module. 
     Herein, the first radio access network node is provided with a wired interface and accesses to a resource coordination center through the wired interface, and the second radio access network node communicates with the first radio access network node through a wireless interface. 
     In an embodiment, the broadcast receiving and transmitting module is further arranged to monitor broadcast of other radio access network nodes in a preset range in preset time Tm and determine a resource pattern which is used by other radio access network nodes in the preset range. 
     In an embodiment, the broadcast receiving and transmitting module is further arranged to broadcast the determined resource pattern. 
     In an embodiment, the access point search module is further arranged to, if a resource pattern which is not used by radio access network nodes in the preset range of the second radio access network node is not found and a resource pattern which has already been used by radio access network nodes in the preset range of the second radio access network node but is allowed to be shared by a plurality of radio access network nodes is not found from the resource pattern set broadcasted by the first radio access network node, search for other first radio access network nodes except the first radio access network node. 
     In an embodiment, the access point search module is arranged to search for the first radio access network node by searching for a specific discovery signal of the first radio access network node; and 
     the specific discovery signal of the first radio access network node is different from a discovery signal of each second radio access network node in the ultra dense network where the first radio access network node is located and is transmitted on a dedicated time domain or frequency domain resource for the first radio access network node. 
     The embodiment of the present disclosure further provides a resource management device, configured on a first radio access network node side, including a wireless backhaul module and a radio access module, herein the wireless backhaul module includes a discovery signal transmitting module, a broadcast receiving and transmitting module and an available resource pattern update module. 
     The discovery signal transmitting module is arranged to transmit a discovery signal of the first radio access network node, herein the discovery signal is used for a second radio access network node to search for the first radio access network node. 
     The broadcast receiving and transmitting module is arranged to broadcast one available resource pattern set, herein the available resource pattern set includes resource patterns which are not used by the second radio access network node in a coverage range of the first radio access network node or have already been used by second radio access network nodes in a coverage range of the first radio access network node but are allowed to be shared by a plurality of radio access network nodes, are provided to the second radio access network node for use, are used for a wireless backhaul link of the second radio access network node and are used for a radio access link of the second radio access network node; or arranged to broadcast a first available resource pattern set and a second available resource pattern set, herein the first available resource pattern set includes resource patterns which are not used by the second radio access network node in a coverage range of the first radio access network node or have already been used by second radio access network nodes in a coverage range of the first radio access network node but are allowed to be shared by a plurality of radio access network nodes, are provided to the second radio access network for use and are used for a wireless backhaul link of the second radio access network node; and the second available resource pattern set includes resource patterns which are not used by the second radio access network node in a coverage range of the first radio access network node or have already been used by second radio access network nodes in a coverage range of the first radio access network node but are allowed to be shared by a plurality of radio access network nodes, are provided to the second radio access network for use and are used for a radio access link of the second radio access network node. 
     The available resource pattern update module is arranged to acquire, from a resource coordination center, a resource pattern set which can be allocated to and used by the first radio access network node, determine a resource pattern which has already been used by second radio access network nodes in the coverage range of the first radio access network node, remove, from the resource pattern set acquired from the resource coordination center, the resource pattern which has already been used and is not allowed to be shared by a plurality of second radio access network nodes, and generate an available resource pattern set. 
     The radio access module is arranged to communicate with user equipment by using a resource pattern which is allocated by the resource coordination center and is used for a radio access link of the first radio access network node. 
     The wireless backhaul module is arranged to communicate with a second radio access network node in the coverage range of the first radio access network node on a resource pattern which is determined by the second radio access network node and is used for the wireless backhaul link between the second radio access network node and the first radio access network node. 
     Herein the first radio access network node is provided with a wired interface and accesses to the resource coordination center through the wired interface, and the second radio access network node communicates with the first radio access network node through a wireless interface. 
     In an embodiment, the broadcast receiving and transmitting module is further arranged to receive broadcast of second radio access network nodes in the coverage range of the first radio access network node, herein the broadcast contains resource patterns selected by the second radio access network nodes. 
     Embodiment One 
       FIG. 7  illustrates a flowchart of embodiment one. Aiming at the first resource management method provided by the present disclosure, a specific implementation process is given and includes the following steps. 
     In step  710 , a second radio access network node AP ( 120 - 1 ,  120 - 3 ,  120 - 4 ,  120 - 6 ,  120 - 7 ) searches for a first radio access network node (resource coordination center accessible node) RCCa-AP ( 120 - 2 ,  120 - 5 ) which is provided with wired interface and accesses to a resource coordination center through the wired interface. 
     As illustrated in  FIG. 1 , in order to not increase the CAPEX and OPEX of UDN deployment and realize flexible and rapid deployment of UDN, the number of RCCa-APs for which wired interfaces are actually deployed in a certain area for accessing to a resource coordination center should be controlled as possible, so as to satisfy actual deployment, thus satisfying the demand of access of other APs in the area through wireless interfaces. Information of the RCCa-APs in a certain area may be written into the AP in advance in an engineering mode, and the AP searches for the RCCa-AP directly according to the information which is written in advance. Such method is simple but the flexibility is not enough. In order to ensure that the AP can rapidly search for the RCCa-APs and the AP and the RCCa-APs realize flexible deployment, in this embodiment or other embodiments, a specific discovery signal of the RCCa-AP may be used, and the specific discovery signal of the RCCa-AP is different from discovery signals of other radio access network nodes APs (i.e., APs which do not access to the RCC directly through wired interfaces) and is transmitted at a time domain or frequency domain position which is specifically designed for the RCCa-AP. The AP can rapidly search for the RCCa-AP through the specific discovery signal of the RCCa-AP. 
       FIG. 8  and  FIG. 9  respectively and exemplarily illustrate schematic diagrams of design of two RCCa-AP specific discovery signals. 
     In  FIG. 8 , f 0  is a center frequency of frequencies used by an ultra dense network in a certain area.  FIG. 8-1  illustrates a schematic diagram of design of a physical control channel of RCCa-AP, and  FIG. 8-2  illustrates a schematic diagram of design of a physical control channel of AP.  820  represents a discovery signal of AP, while the discovery signal of RCCa-AP is located at a frequency domain position  810  which is specially designed for RCCa-AP. 
     Similarly, in  FIG. 9 ,  FIG. 9-1  illustrates a schematic diagram of design of a physical control channel of RCCa-AP, and  FIG. 9-2  illustrates a schematic diagram of design of a physical control channel of AP.  920  represents a discovery signal of AP, while the discovery signal of RCCa-AP is located at a time domain position  910  which is specially designed for RCCa-AP. 
     In an embodiment of the present disclosure, when millimeter waves are used, in order to ensure that the specific discovery signal of the RCCa-AP can be searched out by the surrounding APs in a plurality of directions, the specific discovery signal of the RCCa-AP may be transmitted serially in a plurality of directions. As illustrated in  FIG. 10 , the RCCa-AP sequentially transmits the discovery signal on a plurality of directions  1010 ,  1020 ,  1030  . . .  1040  . . .  10   x 0. 
     In step  720 , the AP receives two resource patterns, i.e., a resource pattern  1  and a resource pattern  2  broadcasted by the RCCa-AP. Herein, the resource pattern  1  is used for a wireless backhaul link of the RCCa-AP, the AP initially accesses to the RCCa-AP on a given resource of the resource pattern  1 , and the resource pattern  2  is used for a radio access link of the RCCa-AP and is provided for shared use by user equipment which access to the RCCa-AP. The two resource patterns broadcasted by the RCCa-AP are respectively used for the wireless backhaul link when the AP initially accesses to the RCCa-AP and the radio access link when user equipment under the RCCa-AP communicates with the RCCa-AP. On one hand, the interference between the radio backhaul link when the AP initially accesses to the RCCa-AP and the radio access link when the user equipment under the RCCa-AP communicates with the RCCa-AP can be solved; and on the other hand, since a shared resource pattern is allocated for a purpose that the AP initially accesses to the RCCa-AP, the interference between the wireless backhaul links between the RCCa-AP to which the AP initially accesses and the AP which has already accessed to the RCCa-AP can be avoided. 
     The resource pattern  1  and the resource pattern  2  are allocated by a Resource Coordination Center (RCC) and then are transmitted to the RCCa-AP through a wired interface between the RCCa-AP and the RCC. Specifically, the resource patterns may be resources which are allocated on entire system bands in frequency domain but are periodically and non-continuously allocated in time domain, may also be resources which are continuously allocated in time domain but are only allocated on partial bands in frequency domain, and may also be resources which are non-continuously allocated in time domain but are only allocated on partial bands at non-continuously allocated time periods.  FIG. 11  respectively and exemplarily illustrates the above-mentioned three types of resource patterns. The resource patterns in  FIG. 11  schematically represent the resource patterns  1  in this embodiment and are used for the wireless backhaul link of the RCCa-AP. 
       FIG. 11-1  exemplarily illustrates a resource pattern which is allocated on a whole system band in frequency domain but is periodically and non-continuously allocated in time domain. Specifically the resource pattern  1  is allocated according to a period T and includes a whole system band  11 - 1 - 10  in t 0 -t 1  and a whole system band  11 - 1 - 30  in t 2 -t 3  in the period T. 
       FIG. 11-2  exemplarily illustrates a resource pattern which is continuously allocated in time domain but is only allocated on partial bands in frequency domain. Specifically the resource pattern  1  includes two parts of band resources  11 - 2 - 10  and  11 - 2 - 30  in frequency domain which are continuously allocated in time as illustrated in the drawing. 
       FIG. 11-3  exemplarily illustrates a resource pattern which is non-continuously allocated in time domain but is only allocated on partial bands at non-continuously allocated time periods. Specifically the resource pattern  1  is allocated according to a period T and includes partial bands  11 - 3 - 10  in t 0 -t 1  and partial bands  11 - 3 - 20  in t 2 -t 3  in the period T. 
     In the embodiment of the present disclosure, when millimeter waves are used, in order to ensure that the above-mentioned two resource patterns broadcasted by the RCCa-AP can be received by the surrounding APs in a plurality of directions, as the same as the transmitting mode of the RCCa-AP discovery signal in step  710 , the broadcast of the RCCa-AP may be transmitted serially in a plurality of directions. 
     Specifically, in a Long Term Evolution (LTE) system, the broadcast in the embodiment of the present disclosure may be a system message transmitted by a Radio Resource Control (RRC) layer and may also be information periodically transmitted by a newly designed Media Access Control (MAC) layer. 
     In step  730 , the AP accesses to the RCCa-AP on a resource of the resource pattern  1 . 
     When a plurality of APs simultaneously access to the RCCa-AP, the plurality of APs contend for the right to use the resource of the resource pattern  1  in order to access to the RCCa-AP. 
     In step  740 , the AP receives resource patterns which are transmitted by the RCCa-AP to the AP and are allocated to the AP for using for a wireless backhaul link and a radio access link respectively. 
     Herein, the resource patterns which are allocated by the RCCa-AP to the AP for using for the wireless backhaul link and the radio access link are resource patterns which are not used or have already been used but are allowed to be shared by a plurality of APs. Here, the situation that the resource patterns are used refers to that the resource patterns are used by the RCCa-AP or accessing (accessing to the RCCa-AP) APs in an area (e.g., RCCa-AP coverage area). The allocated resource patterns are allocated by a Resource Coordination Center (RCC) and then are transmitted to the RCCa-AP through a wired interface between the RCCa-AP and the RCC, or are selected by the RCCa-AP from a resource pattern set which is allocated by the RCC and is transmitted to the RCCa-AP through a wired interface between the RCCa-AP and the RCC. Resource patterns which are used by the AP in a certain area and are used for the wireless backhaul link and the radio access link are uniformly allocated by the RCC, or after the RCC transmits a resource pattern set available for AP to access to the RCCa-AP, the RCCa-AP uniformly allocates resource patterns used by the AP accessing to the RCCa-AP, thereby effectively avoiding the mutual interference between APs, between wireless backhaul links, between radio access links and between the wireless backhaul link and the radio access link. 
     Corresponding to the resource management method provided by this embodiment,  FIG. 12  illustrates a structural schematic diagram of the second radio access network node(access point  120 ). As illustrated in  FIG. 12 , the second radio access network node  120  includes a radio access module  1201  and a wireless backhaul module  1202 . 
     The radio access module  1201  is connected to an antenna  123  and communicates with at least one user equipment  121  through a radio access link. 
     The wireless backhaul module  1202  is connected to an antenna  124  and communicates with at least one AP  122  through a wireless backhaul link, here the access point  122  especially refers to a first radio access network node (resource coordination center accessible node) RCCa-AP. 
     The wireless backhaul link  1202  includes three modules, including an access point search module  1202 - 1 , a broadcast receiving module  1202 - 2  and an access and configuration receiving module  1202 - 3 . 
     Herein, the access point search module  1202 - 1  searches for other access points, especially searches for the RCCa-AP. Herein, the access point search module may be preconfigured with information of the RCCa-AP, and the access point search module performs searching directly according to the configured information of the RCCa-AP, or the access point search module detects a specific discovery signal of the RCCa-AP. The access point search module may be arranged to search for the RCCa-AP in a plurality of directions. 
     The broadcast receiving module  1202 - 2  is arranged to receive the information broadcasted by the RCCa-AP searched out by the access point search module  1202 - 1 . The received broadcast includes a resource pattern  1  and a resource pattern  2 ; and the broadcast receiving module may be arranged to receive broadcast information in a plurality of directions. 
     The access and configuration receiving module  1202 - 3  is arranged to access to the access point  122  on a resource of the resource pattern  1 , and receive, from the access point  122 , resource patterns which are configured to a wireless backhaul link and a radio access link of the access point  120 . 
     Corresponding to the resource management method provided by embodiment one, FIG.  13  illustrates a structural schematic diagram of a first radio access network node(resource coordination center accessible node RCCa-AP  130 ). As illustrated in  FIG. 13 , the access point  130  includes a radio access module  1301  and a wireless backhaul module  1302 . 
     The radio access module  1301  is connected to an antenna  133  and communicates with at least one user equipment  131  through a radio access link. 
     The wireless backhaul module  1302  is connected to an antenna  134  and communicates with at least one access point  132  through a wireless backhaul link. 
     The wireless backhaul module  1302  is configured with three modules, including a discovery signal transmitting module  1302 - 1 , a broadcast transmitting module  1302 - 2  and an access and configuration module  1302 - 3 . 
     The discovery signal transmitting module  1302 - 1  is arranged to transmit a discovery signal of the first radio access network node  130 , herein specifically the discovery signal is a specific discovery signal of an RCCa-AP, and the discovery signal transmitting function module is arranged to transmit the discovery signal in a plurality of directions. 
     The broadcast transmitting module  1302 - 2  is arranged to periodically transmit broadcast information, herein the broadcast information includes a resource pattern  1  and a resource pattern  2 , and the broadcast transmitting module is arranged to transmit the discovery signal in a plurality of directions. 
     The access and configuration module  1302 - 3  is arranged to communicate with the access point  132  on a resource of the resource pattern  1 , accept the access point  132  and configure a wireless backhaul link resource pattern and a radio access link resource pattern acquired from the RCC through a wired interface for the access point  132 . 
     In actual implementation, the function modules in the resource management device provided by this embodiment may include combinations of hardware and software such as processors, memories and programs running on the processors. 
     Embodiment Two 
       FIG. 14  illustrates a schematic diagram of a network topology of an access network according to embodiment two, by taking a scenario that four radio access network nodes are deployed in an area as an example, herein a first radio access network node  1420 - 1  is a resource coordination center accessible node and accesses to a resource coordination center  1410  through a wired connection  1430 , there is no interface connection between other three second radio access network nodes (second radio access network nodes)  1420 - 2  to  1420 - 4  and  1410 , and the three radio access network nodes at least are provided with a wireless backhaul module and may communicate with surrounding radio access network nodes. By taking the radio access network node  1420 - 2  (AP 1 ) as an example, the AP 1  may communicate with  1420 - 1  through a wireless backhaul link  1450 - 1 , and may also respectively communicate with  1420 - 4  and  1420 - 3  through wireless backhaul links  1440 - 1  and  1440 - 2 . 
       FIG. 15  illustrates an implementation flowchart of the second resource management method provided by the embodiment of the present disclosure by taking AP 1  as an example in ultra dense network deployment in  FIG. 14 . The implementation process includes the following steps. 
     In step  1510 , an AP 1  searches for an RCCa-AP. A specific implementation mode that the AP 1  searches for the RCCa-AP is the same as that in step  710  of embodiment one. 
     In step  1520 , the AP 1  receives a resource pattern set broadcasted by the RCCa-AP, herein the resource pattern set includes resource patterns which are provided to the APs, which can access to the RCCa-AP through the wireless backhaul link, for use, are used for the wireless backhaul link of the APs and resource patterns which are used for the radio access link of the APs. 
     Or, the AP 1  receives two resource pattern sets, i.e., a resource pattern set  1  and a resource pattern set  2  broadcasted by the RCCa-AP, herein the resource pattern set  1  includes resource patterns which are provided to the AP, which accesses to the RCCa-AP through the wireless backhaul link, for use, and are used for the wireless backhaul link of the AP; and the resource pattern set  2  includes resource patterns which are provided to the AP, which accesses to the RCCa-AP through the wireless backhaul link, for use, and are used for the wireless backhaul link of the AP. 
     The resource pattern set refers to a set including a plurality of resource patterns, and is allocated by the RCC and then is transmitted to the RCCa-AP through a wired interface between the RCCa-AP and the RCC. In this embodiment, supposing that the RCCa-AP broadcasts one resource pattern set, the set includes eight resource patterns, i.e., {resource pattern  1 , resource pattern  2 , resource pattern  3  . . . resource pattern  8 }. The number of resource patterns included in the resource pattern set is determined by the RCC according to the number of APs accessible to RCCa-AP, current system bandwidth, resource use situation, etc. 
     In this embodiment, when millimeter waves are used, in order to ensure that the resource pattern set broadcasted by the RCCa-AP can be received by surrounding APs in a plurality of directions, the broadcast of the RCCa-AP may be transmitted serially in a plurality of directions. 
     In step  1530 , the AP 1  monitors broadcast of an AP 2  and an AP 3  in time Tm and determines resource patterns which are used by the AP 2  and the AP 3 . 
     As illustrated in  FIG. 16 , based on the ultra dense network deployment scenario in  FIG. 14 , in this embodiment, five broadcast transmitting moments are set in a broadcast repetition period Tm, and the specific time length of Tm is determined according to the number of APs accessible to RCCa-AP, a time interval between adjacent broadcast transmitting moments, etc. As illustrated in  FIG. 16 , for the RCCa-AP ( 1420 - 1 ), AP 2  ( 1420 - 3 ) and AP 3  ( 1420 - 4 ), at broadcast transmitting moments  1610 ,  1630  and  1640  respectively, in the illustrated period Tm in the deployment scenario in  FIG. 14 , after the AP 1  searches out the RCCa-AP, a resource pattern set transmitted by the RCCa-AP is received at the broadcast transmitting moment  1610 , then resource patterns which are broadcasted by surrounding AP 2  and AP 3  and used by the AP 2  and the AP 3  are monitored and received at the broadcast transmitting moments  1630  and  1640  respectively during the time Tm. In this embodiment, it is supposed that the AP 2  broadcasts {resource pattern  1 , resource pattern  2 } and the AP 3  broadcasts {resource pattern  3 , resource pattern  4 }. 
     In step  1540 , the AP 1  selects, from the resource pattern set broadcasted by the RCCa-AP, two resource patterns which are not used by the AP 2  and the AP 3 , herein one resource pattern is used for a radio access link and the other resource pattern is used for a wireless backhaul link. In this embodiment, resource patterns  5  to  8  in the resource pattern set are not used by the AP 2  and the AP 3 , and the AP 1  selects a resource pattern  5  and a resource pattern  6  therein. Or, if the resource pattern set broadcasted by the RCCa-AP has resource patterns which are allowed to be shared by a plurality of APs and the resource patterns which are used by the AP 2  and the AP 3  are exactly the resource patterns which are allowed to be shared by a plurality of APs in the resource pattern set broadcasted by the RCCa-AP, the AP 1  may also select the resource patterns which have already been used by AP 2  or the AP 3 . 
     The AP 1  determines resource patterns which have already been used by the AP 2  and the AP 3  by monitoring the broadcast of the surrounding APs in the broadcast repetition period and then selects resource patterns which are not used by the surrounding APs from the resource pattern set, thereby effectively avoiding the mutual interference between the wireless backhaul links, between the radio access links and between the wireless backhaul link and the radio access link between the AP 1 , the AP 2  and the AP 3 . 
     In step  1550 , the AP 1  broadcasts the resource patterns {resource pattern  5 , resource pattern  6 } selected by it starting from a next period Tm, herein the AP 1  transmits broadcast at the broadcast transmitting moment  1620 - 1  which is not occupied by the AP 2  and the AP 3  in the next period Tm. 
     After the AP 1  selects the resource patterns, the AP 1  broadcasts the resource patterns selected by it starting from the next period Tm, such that APs which are newly enabled or newly added into the area subsequently can monitor the resource patterns which are used by the AP 1 , the APs which are newly enabled or newly added into the area subsequently select resource patterns which are not used by the AP 1  and the mutual interference is avoided. 
     Corresponding to the resource management method provided by this embodiment,  FIG. 17  illustrates a structural schematic diagram of the second radio access network node (access point  170 ). As illustrated in  FIG. 17 , the access point  170  includes a radio access module  1701  and a wireless backhaul module  1702 . 
     The radio access module  1701  is connected to an antenna  173  and communicates with at least one user equipment  171  through a radio access link. 
     The wireless backhaul module  1702  is connected to an antenna  174  and communicates with at least one AP  172  through a wireless backhaul link, here the access point  172  especially refers to a first radio access network node (resource coordination center accessible node) RCCa-AP. 
     The wireless backhaul modu 1 e 1702  includes three modules, including an access point search module  1702 - 1 , a broadcast receiving and transmitting module  1702 - 2  and a resource pattern selection module  1702 - 3 . 
     Herein, the access point search module  1702 - 1  searches for other access points, especially searches for the RCCa-AP. Herein, the access point search module may be preconfigured with information of the RCCa-AP, and the access point search module performs searching directly according to the configured information of the RCCa-AP, or the access point search module detects a specific discovery signal of the RCCa-AP. The access point search function module may be arranged to search for the RCCa-AP in a plurality of directions. 
     The broadcast receiving and transmitting module  1702 - 2  includes a receiving module  1702 - 21  and a transmitting module  1702 - 22 , herein the receiving module  1702 - 21  is arranged to receive the information which is broadcasted by the first radio access network node (resource coordination center accessible node RCCa-AP) searched out by the access point search function module  1702 - 1  and receive the information which is broadcasted by the surrounding APs (AP 2  and AP 3 ) in the period Tm, and transmit the received information to the resource pattern selection function module  1702 - 3 . Herein, the broadcast information received from the RCCa-AP is resource pattern set information, and the broadcast information received from the surrounding APs is about resource patterns which are used for the wireless backhaul link and the radio access link used by the surrounding APs. The transmitting module  1702 - 22  is arranged to receive the selected resource patterns from the resource pattern selection function module  1702 - 3  and broadcast and transmit the selected resource patterns starting from a next period Tm. 
     The resource pattern selection module  1702 - 3  is arranged to select resource patterns which are not used by the surrounding APs from the resource pattern set received from the RCCa-AP, and transmit the selected resource patterns to the broadcast receiving and transmitting function module  1702 - 2 . 
     Embodiment Three 
     Still by taking  FIG. 14  as an example, based on the ultra dense network deployment, by taking AP 1  as an example,  FIG. 18  illustrates an implementation flowchart of an improved method of the second resource management method provided by the embodiment of the present disclosure. The specific implementation process includes the following steps. 
     In step  1810 , an AP 1  searches for an RCCa-AP. A specific implementation mode for the AP 1  to search for the RCCa-AP is the same as that in step  710  of embodiment one. 
     In step  1820 , the AP 1  receives an available resource pattern set broadcasted by the RCCa-AP, herein the available resource pattern set includes available resource patterns which are not used by accessing APs (e.g., accessing AP 2  and AP 3 ) in an area, or have already been used by accessing APs in the area but are allowed to be shared by a plurality of APs, are provided to the APs which can access to the RCCa-AP through a wireless backhaul link for use, are used for the wireless backhaul link of the APs and are used for the radio access link of the APs. 
     Or, the AP receives two available resource pattern sets, i.e., an available resource pattern set  1  and an available resource pattern set  2  broadcasted by the RCCa-AP, herein the available resource pattern set  1  includes available resource patterns which are not used by accessing APs (e.g., accessing AP 2  and AP 3 ) in an area or have already been used by accessing APs in the area but are allowed to be shared by a plurality of APs, are provided to the APs which can access to the RCCa-AP through a wireless backhaul link and are used for the wireless backhaul link of the APs; and the resource pattern set  2  includes available resource patterns which are not used by accessing APs (e.g., accessing AP 2  and AP 3 ) in an area, or have already been used by accessing APs in the area but are allowed to be shared by a plurality of APs, are provided to the APs, which can access to the RCCa-AP through a wireless backhaul link and are used for the radio access link of the APs. 
     The available resource pattern set includes a set of resource patterns which are not used by accessing APs in the area or have already been used by accessed APs in the area but are allowed to be shared by a plurality of APs, and a set which is formed after the RCCa-AP deletes resource patterns which have already been used by accessing APs in the area and are not allowed to be shared by a plurality of APs after the RCCa-AP receives the resource pattern set which can be allocated by the RCCa-AP for using from the RCC. The RCC determines the resource pattern set which can be allocated by the RCCa-AP for using according to number of APs accessible to the RCCa-AP, current system bandwidth, resource use situation, etc. In this embodiment, it is supposed that the RCCa-AP acquires eight resource patterns, i.e., {resource pattern  1 , resource pattern  2  . . . resource pattern  8 } from the RCC, herein since resource patterns  5  to  8  have already been used by accessing AP 2  and AP 3 , corresponding to this step, the available resource pattern set broadcasted by the RCCa-AP includes {resource pattern  1 , resource pattern  2 , resource pattern  3 , resource pattern  4 }, i.e., the available resource pattern set received by the AP 1  in this step is {resource pattern  1 , resource pattern  2 , resource pattern  3 , resource pattern  4 }. Accordingly, it can be seen that, since what is broadcasted by the RCCa-AP is a set of available resource patterns, the mutual interference between the wireless backhaul links, between the radio access links and between the wireless backhaul link and the radio access link between the AP 1 , the AP 2  and the AP 3  is effectively avoided. 
     In this embodiment, when millimeter waves are used, in order to ensure that the available resource pattern set broadcasted by the RCCa-AP can be received by surrounding APs in a plurality of directions, the broadcast of the RCCa-AP may be transmitted serially in a plurality of directions. 
     In step  1830 , the AP 1  selects, from the available resource pattern set broadcasted by the RCCa-AP, two available resource patterns, herein one available resource pattern is used for a radio access link and the other available resource pattern is used for a wireless backhaul link. In this embodiment, the AP 1  selects the resource pattern  1  and the resource pattern  2 . 
     In step  1840 , the AP 1  broadcasts the two selected available resource patterns. 
     Step  1840  is an alternative step, i.e., when the RCCa-AP can detect the available resource patterns which are specifically selected and used by the AP 1  through a blind detection process of a layer  1  (physical layer), in this step the AP 1  may not need to broadcast the two selected available resource patterns. 
     In step  1850 , after the RCCa-AP receives the broadcast of the AP 1 , the RCCa-AP updates the available resource pattern set. 
     The RCCa-AP may detect the two available resource patterns which are specifically selected and used by the AP 1  through the blind detection process of the layer  1  (physical layer). For example, the RCCa-AP may determine the available resource patterns which are specifically selected and used by the AP 1  through pilot signal energy detection. 
     In this embodiment, the updated available resource pattern set is {resource pattern  3 , resource pattern  4 }. 
     In step  1860 , the RCCa-AP broadcasts the updated available resource pattern set. Specifically, the RCCa-AP broadcasts the updated available resource pattern set at a next broadcast period. 
       FIG. 19  illustrates a broadcast transmitting/receiving sequence diagram of the AP 1  and the RCCa-AP according to this embodiment, herein Tm is broadcast repetition period, i.e., broadcast period, five broadcast transmitting moments are set in Tm, the RCCa-AP and the AP 1  transmit broadcast at illustrated  1910  ( 1910 - 1 ) and  1920  ( 1920 - 1 ) respectively, in step  1810  of this embodiment, the AP 1  receives the available resource pattern set {resource pattern  1 , resource pattern  2 , resource pattern  3 , resource pattern  4 } transmitted by the RCCa-AP at positions corresponding to  1910 , the AP 1  selects the resource pattern  1  and the resource pattern  2  therein and then broadcasts the selected resource patterns at  1920 , and the RCCa-AP receives the broadcast of the AP 1  at positions corresponding to  1920 , updates the available resource pattern set to {resource pattern  3 , resource pattern  4 } and broadcasts the updated available resource pattern set starting from the broadcast moment  1910 - 1  of a next broadcast period of the RCCa-AP. 
     Corresponding to the resource management method provided by this embodiment, as illustrated in  FIG. 17 , a second radio access network node  170  includes a radio access module  1701  and a wireless backhaul module  1702 . 
     The radio access module  1701  is connected to an antenna  173  and communicates with at least one user equipment  171  through a radio access link. 
     The wireless backhaul module  1702  is connected to an antenna  174  and communicates with at least one access point  172  through a wireless backhaul link, here the access point  172  especially refers to a first radio access network node (resource coordination center accessible node) RCCa-AP. 
     The wireless backhaul module  1702  includes three modules, including an access point search module  1702 - 1 , a broadcast receiving and transmitting module  1702 - 2  and a resource pattern selection module  1702 - 3 . 
     The access point search module  1702 - 1  searches for other access points, especially searches for the RCCa-AP. Herein, the access point search function module may be preconfigured with information of the RCCa-AP, and the access point search module performs searching directly according to the configured information of the RCCa-AP, or the access point search module detects a specific discovery signal of the RCCa-AP. The access point search module may be arranged to search for the RCCa-AP in a plurality of directions. 
     The broadcast receiving and transmitting module  1702 - 2  includes a receiving module  1702 - 21  and a transmitting module  1702 - 22 , herein the receiving module  1702 - 21  is arranged to receive the information which is broadcasted by the first radio access network node (resource coordination center accessible node RCCa-AP) searched out by the access point search module  1702 - 1  and transmit the received information to the resource pattern selection module  1702 - 3 . Specifically, the broadcast information received from the RCCa-AP is available resource pattern set information. The transmitting module  1702 - 22  is arranged to receive the selected available resource patterns from the resource pattern selection function module  1702 - 3  and broadcast and transmit the selected available resource patterns starting from a next broadcast period. Here, the receiving module  1702 - 21  is an alternative module, i.e., when the RCCa-AP has the function of detecting the available resource patterns selected and used by  1702 - 1  through a blind detection process of a layer  1  (physical layer), the broadcast receiving and transmitting module  1702 - 2  may only include the transmitting module  1702 - 22 . 
     The resource pattern selection module  1702 - 3  is arranged to select available resource patterns from the available resource pattern set received from the RCCa-AP, and transmit the selected available resource patterns to the broadcast receiving and transmitting function module  1702 - 2 . 
     Corresponding to the resource management method provided by this embodiment, FIG.  20  illustrates a structural schematic diagram of a first radio access network node (resource coordination center accessible node RCCa-AP  200 ). As illustrated in  FIG. 20 , the first radio access network node 200  includes a radio access module  2001  and a wireless backhaul module  2002 . 
     The radio access module  2001  is connected to an antenna  203  and communicates with at least one user equipment  201  through a radio access link. 
     The wireless backhaul module  2002  is connected to an antenna  204  and communicates with at least one second radio access network node  202  through a wireless backhaul link. 
     The wireless backhaul module 2002  is configured with three function modules, including a discovery signal transmitting module  2002 - 1 , a broadcast receiving and transmitting module  2002 - 2  and an available resource pattern update module  2002 - 3 . 
     The discovery signal transmitting module  2002 - 1  is arranged to transmit a discovery signal of the first radio access network node  200 , particularly, the discovery signal refers to a specific discovery signal of RCCa-AP. The discovery signal transmitting module is arranged to transmit the discovery signal in a plurality of directions. 
     The broadcast receiving and transmitting module  2002 - 2  includes a receiving module  2002 - 21  and a transmitting module  2002 - 22 . Herein, the receiving module  2002 - 21  is arranged to receive broadcast of the second radio access network node  202  which broadcasts available resource patterns selected and used by  202 , and transmit the received information to the available resource pattern update module  2002 - 3 . The transmitting module  2002 - 22  is arranged to acquire an available resource pattern set from  2002 - 3  and broadcast the available resource pattern set starting from a next broadcast period. 
     The available resource pattern update module  2002 - 3  is arranged to acquire, from an RCC, a resource pattern set which can be allocated and used by the first access point network node  200  through a wired interface, delete resource patterns which are acquired from the receiving module  2002 - 21  and have already been used by accessed APs in an area and are not allowed to be shared by a plurality of APs (i.e., update the available resource pattern set), e.g., resource patterns which have already been used by the second radio access network node  202  and are not allowed to be shared by a plurality of APs in  FIG. 20 , and transmit the updated available resource pattern set which is obtained finally to the transmitting module  2002 - 22 . 
     During actual implementation, the function modules in the above-mentioned resource management device provided by this embodiment may include combinations of hardware and software such as processors, memories and programs running on the processors. 
     One skilled in the art can understand that all or partial steps in the above-mentioned embodiments may be implemented by using a computer program process, the computer program may be stored in a computer-readable storage medium, the computer program is executed on a corresponding hardware platform (e.g., a system, equipment, an apparatus or a device), and when being executed, it includes one or combinations of the steps of the method embodiments. 
     All or partial steps in the above-mentioned embodiments may also be implemented by using integrated circuits, and these steps may be respectively manufactured into integrated circuit modules, or more modules or steps thereof may be manufactured into a single integrated circuit module to implement. 
     Each device/function module/function unit in the above-mentioned embodiments may be implemented by using a general-purpose computer, and they may be integrated on a single computer and may also be distributed on a network consisting of a plurality of computer. 
     When each device/function module/function unit in the above-mentioned embodiments is implemented by means of software function module and is sold or used as an independent product, it may be stored in a computer-readable storage medium. The above-mentioned computer-readable storage medium may be a read-only memory, a magnetic disk, a compact disk or the like. 
     INDUSTRIAL APPLICABILITY 
     Embodiments of the present disclosure enable wireless backhaul links and radio access links of radio access network nodes to coexist without causing interference, and effectively realize the resource management between all links in an ultra dense network.