Abstract:
A method and a user terminal for implementing an uplink resource grant (ul grant) are provided. The method includes a user terminal receiving an ul grant from a base station, the ul grant including an uplink resource index; the user terminal identifying from the received uplink resource index, a corresponding group of at least one uplink subframe, by referring to a pre-defined relationship between the uplink resource index and the corresponding group, the received uplink resource index having one of a plurality of values, the pre-defined relationship correlating each value of the uplink resource index with a respective one of a plurality of groups, each group having a unique uplink subframe grouping; and sending to the base station, by the user terminal, data on each of the at least one uplink subframes in the identified group.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation of U.S. patent application Ser. No. 12/504,239, filed on Jul. 16, 2009, which is a continuation of International Application No. PCT/CN2008/071926, filed on Aug. 7, 2008. The International Application claims priority to Chinese Patent Application No. 200710140544.8, filed on Aug. 9, 2007. All of the afore-mentioned patent applications are hereby incorporated by reference in their entireties. 
    
    
     FIELD OF THE DISCLOSURE 
     The present disclosure relates to the field of communications, and more particularly to a method, a base station (BS), and a user terminal for implementing uplink resource indication. 
     BACKGROUND OF THE DISCLOSURE 
     Time Division Duplex (TDD) is a radio transmission mode on radio channels. In the TDD mode, the transmission and reception are conducted in a time division manner, that is, the radio transmission based on the TDD mode realizes the time division multiplexing of uplink and downlink channels. The TDD mode is implemented by repeating Time Division Multiple Access (TDMA) frame structures periodically in time domains. For example, in Long Term Evolution (LTE), the 3GPP LTE has two TDD frame structures. The first frame structure is as shown in  FIG. 1 , in which a radio frame is composed by 20 slots, a period of a frame is 10 ms, and every two slots form a subframe (SF). The second frame structure is as shown in  FIG. 2 , in which a period of a frame is also 10 ms, a frame is divided into two half-frames, each half-frame is composed by seven SFs, a guard interval is inserted between every two SFs, and a guard period (GP) is formed by a downlink pilot time slot (DwPTS), a GP, and an uplink pilot time slot (UpPTS). 
     In the frame structure in the TDD mode, one frame includes several SFs or slots. The SFs may be classified into uplink SFs and downlink SFs, and a TDD system may use a transfer point to change the SF types flexibly. For example, the current 3GPP LTE standard specifies various SF ratios in the two frame structures.  FIG. 3  is a schematic view of various uplink and downlink SF ratios in the first frame structure, in which the ratios in one frame are illustrated.  FIG. 4  is a schematic view of various uplink and downlink SF ratios in the second frame structure, in which the ratios in one and a half frames are illustrated. A table of uplink and downlink SF ratios (as shown in Table 1) can be concluded from  FIGS. 3 and 4 . Table 1 lists the situation of one transfer point, that is, the situation that the uplink and downlink SFs have only one type transfer. 
     
       
         
               
               
               
             
           
               
                   
                 TABLE 1 
               
               
                   
                   
               
               
                   
                   
                 Uplink and Downlink SF Ratios 
               
               
                   
                 Frame Structure 
                 (Downlink:Uplink) 
               
               
                   
                   
               
             
             
               
                   
                 First Frame Structure 
                 4:1, 3:2, 9:1, 6:4, 7:3, 8:2, 10:0, 
               
               
                   
                   
                 2:2, 4:2, 2:3, 1:4 
               
               
                   
                 Second Frame Structure 
                 6:1, 5:2, 4:3, 3:4, 2:5, 1:6 
               
               
                   
                   
               
             
          
         
       
     
     According to different service requirements, the TDD system needs to indicate the uplink resources to which some uplink instructions are directed in the uplink instructions. For example, in downlink transmission of a 3GPP Evolved Universal Terrestrial Radio Access (E-UTRA) system, an Orthogonal Frequency Division Multiplexing (OFDM) technology is employed to realize multiple access. The OFDM is a multi-carrier communication technology. In a multi-carrier communication system, different time domain and frequency domain resources are granted to different users to realize multiplexing of time-frequency resources by multiple users. Here, the time-frequency resources may be granted by carrying resource grant indications of corresponding uplink SFs (ul grant) in downlink control signaling of a user. A ul grant may contain different contents. Table 2 lists the content of a ul grant. 
     
       
         
               
             
               
               
               
             
               
               
               
             
           
               
                 TABLE 2 
               
             
             
               
                   
               
               
                 5 MHz 
               
               
                 UL 
               
             
          
           
               
                   
                 Occupied 
                   
               
               
                 Domain 
                 Bits 
                 Content 
               
               
                   
               
             
          
           
               
                 Resource Grant 
                 9 
                 Continuous physical resource blocks 
               
               
                   
                   
                 granted to a user 
               
               
                 Transmission Format 
                 7 
                 Transmission format indication, 
               
               
                 Indication/Transmission Block Size + 
                   
                 modulation and information bits number 
               
               
                 Modulation Code Format 
                   
                 and code formats 
               
               
                 Hybrid Automatic Retransmission 
                 2 
                 Synchronous HARQ: 2-3 bits of serial 
               
               
                 Request (HARQ) 
                   
                 number and implicit confirmation of 
               
               
                   
                   
                 previous transmission blocks 
               
               
                 Power Control 
                 2 
                 Relative instructions 
               
               
                 Pilot Instruction 
                 1 
                 Whether the pilot appears in the last 
               
               
                   
                   
                 long block (from other user terminals) 
               
               
                   
                   
                 or whether the last long block is 
               
               
                   
                   
                 configured to transmit data 
               
               
                 Channel Quality Indication 
                 1 
                 The quality indication report about the 
               
               
                   
                   
                 channel scheduling should be included 
               
               
                   
                   
                 in the data 
               
               
                 ACK/NACK Indication 
                 1 
                 Indicating that the user terminal should 
               
               
                   
                   
                 reserve resources for ACK/NACK on 
               
               
                   
                   
                 the physical uplink synchronous channel 
               
               
                 Multi-antenna Technology 
                 2 
                 Determined by multi-user MIMO and 
               
               
                   
                   
                 uplink multi-antenna technology, 2 bits 
               
               
                 User Terminal Identity + Cyclic 
                 20 
                 16-24-bit CRC 
               
               
                 Redundancy Check (CRC) 
               
               
                   
               
             
          
         
       
     
     Generally, a base station (BS) adopts downlink SFs to send the ul grant as shown in Table 2. After receiving the ul grant, each user determines whether the user identity in the ul grant is consistent with the identity of each user itself; and if they are consistent, the resources are allocated according to the ul grant. Thus, the resources can be granted to all users. For a user, when the downlink SFs are more than the uplink SFs, each of the downlink SFs is mapped to one uplink SF, that is, the downlink SF may be configured to send a ul grant for one uplink SF. However, the frame structure in the TDD system may be asymmetrical in terms of the uplink and downlink ratio, as shown in Table 1, that is, one downlink SF may be corresponding to multiple uplink SFs, so that the corresponding uplink SF cannot be determined according to one ul grant. In this case, a downlink SF needs to be configured to send multiple ul grants, so that one downlink SF is corresponding to multiple uplink SFs, and the ul grants will be sent separately. In other words, for the same user, if it is determined that n uplink SFs are required after scheduling, n corresponding ul grants exist, which will be transmitted repeatedly. Thus, the information such as the user identity is also repeatedly transmitted for n times, resulting in the waste of transmission resources such as signaling and channels. 
     It is known from the above analysis that the existing method for implementing uplink resource indication in the TDD system cannot indicate the uplink resources corresponding to the ul grants precisely, which may cause the waste of the resources and lead to a low utilization of the resources. 
     SUMMARY 
     Accordingly, the present invention provides a method, a base station (BS), and a user terminal for implementing uplink resource indication. 
     A method for implementing uplink resource indication includes: 
     An uplink resource index is carried in a ul grant, in which the uplink resource index corresponds to at least one uplink resource in terms of indication. 
     The ul grant is sent. 
     A BS for implementing uplink resource indication includes an index carrying module and an instruction sending module. 
     The index carrying module is configured to carry an uplink resource index in a ul grant, in which the uplink resource index corresponds to at least one uplink resource in terms of indication. 
     The instruction sending module is configured to send the ul grant. 
     A user terminal for implementing uplink resource indication includes an instruction receiving module, an instructing resolving module, and an execution module. 
     The instruction receiving module is configured to receive a ul grant from a BS, in which the ul grant carries an uplink resource index, and the uplink resource index corresponds to at least one uplink resource in terms of indication. 
     The instruction resolving module is configured to resolve the uplink resource index from the ul grant received by the instruction receiving module. 
     The execution module is configured to obtain the at least one uplink resource corresponding to the uplink resource index resolved by the instruction resolving module according to a corresponding relation between the uplink resource index and the at least one uplink resource obtained in advance, and perform the resource grant on the obtained at least one uplink resource. 
     It is known from the above technical solutions that the method, BS, and user terminal for implementing uplink resource indication according to the embodiments of the present invention realize accurate indication of the at least one uplink resource through the uplink resource index, prevent repeated transmission of the same information in multiple uplink resources, effectively reduce the signaling overhead, and increase the resource utilization. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The present invention will become better understood from the detailed description given herein below for illustration only, and thus are not limitative of the present invention, and wherein: 
         FIG. 1  is a schematic view of a first frame structure in the prior art; 
         FIG. 2  is a schematic view of a second frame structure in the prior art; 
         FIG. 3  is a schematic view of various uplink and downlink RF ratios in the first frame structure in the prior art; 
         FIG. 4  is a schematic view of various uplink and downlink RF ratios in the second frame structure in the prior art; 
         FIG. 5  is a schematic flow chart of a method for implementing uplink resource indication according to a first embodiment of the present invention; 
         FIG. 6  is a schematic flow chart of a method for implementing uplink resource indication according to a second embodiment of the present invention; 
         FIG. 7  is a schematic structural view of a BS for implementing uplink resource indication according to a third embodiment of the present invention; 
         FIG. 8  is a schematic structural view of a user terminal according to a third embodiment of the present invention; 
         FIG. 9  is a schematic view of a frame structure according to an embodiment of the present invention; 
         FIG. 10  is a schematic view of various uplink and downlink RF ratios in a TDD frame structure according to an embodiment of the present invention; 
         FIG. 11  is a schematic flow chart of a method for implementing uplink resource indication according to a fifth embodiment of the present invention; and 
         FIG. 12  is a schematic flow chart of a method for implementing uplink resource indication according to a sixth embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE EMBODIMENTS 
     In order to make the objectives, technical solutions, and beneficial effects of the present invention comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. 
     A method according to an embodiment of the present invention includes the following steps. An uplink resource index is carried in a ul grant, in which the uplink resource index is corresponding to at least one uplink resource in terms of indication. Then, the ul grant is sent. 
     In the embodiment of the present invention, the uplink resource may be a time domain resource such as an uplink slot or an uplink SF, or other resource blocks such as a frequency domain resource block. The uplink SF is taken as an example below to illustrate the present invention. 
       FIG. 5  is a schematic flow chart of a method for implementing uplink resource indication according to a first embodiment of the present invention. 
     In Step  501 , a corresponding relation between an uplink resource index and at least one uplink resource in terms of indication is established. 
     The method for establishing the corresponding relation between the uplink resource index and the at least one uplink resource in terms of indication includes the following steps. The at least one uplink resource is combined into one group, and the uplink resources in each group are not completely the same. Each group is corresponding to an uplink resource index, so as to establish the corresponding relation between the uplink resource index and the at least one uplink resource in terms of indication. 
     In this embodiment, uplink resource indexes of different bits are applied to different frame structures, so that different corresponding relations between the uplink resource index and at least one uplink SF can be established. The establishing the corresponding relation between the uplink resource index and the at least one uplink SF in terms of indication in different circumstances is described in detail below. Persons skilled in the art should understand that only some specific examples of the technical solutions according to the embodiments of the present invention are illustrated below, and the present invention is not limited thereto. 
     In a first case, for the frame structure shown in  FIG. 2 , the ul grant supports the indication of discontinuous uplink SFs, and the uplink resource index has four bits. Table 3 lists a combination in the first case. In this combination, one or two uplink SFs are combined into one group. 
     
       
         
               
               
               
               
             
           
               
                 TABLE 3 
               
               
                   
               
               
                   
                 DL: SF0, 
                 DL: SF0, SF6 
                 DL: SF0, SF5~SF6 
               
               
                 Uplink Resource 
                 UL: SF1~SF6 
                 UL: SF1~SF5 
                 UL: SF1~SF4 
               
               
                 Index 
                 (1:6) 
                 (2:5) 
                 (3:4) 
               
               
                   
               
             
             
               
                 0000 
                 SF1 
                 SF1 
                 SF1 
               
               
                 0001 
                 SF2 
                 SF2 
                 SF2 
               
               
                 0010 
                 SF3 
                 SF3 
                 SF3 
               
               
                 0011 
                 SF4 
                 SF4 
                 SF4 
               
               
                 0100 
                 SF5 
                 SF5 
                 SF1 and SF2 
               
               
                 0101 
                 SF6 
                 SF1 and SF2 
                 SF1 and SF3 
               
               
                 0110 
                 SF1 and SF2 
                 SF1 and SF3 
                 SF1 and SF4 
               
               
                 0111 
                 SF1 and SF3 
                 SF1 and SF4 
                 SF2 and SF3 
               
               
                 1000 
                 SF1 and SF4 
                 SF1 and SF5 
                 SF2 and SF4 
               
               
                 1001 
                 SF2 and SF4 
                 SF2 and SF3 
                 SF3 and SF4 
               
               
                 1010 
                 SF2 and SF5 
                 SF2 and SF4 
                 Reserved 
               
               
                 1011 
                 SF3 and SF4 
                 SF2 and SF5 
                 Reserved 
               
               
                 1100 
                 SF3 and SF5 
                 SF3 and SF4 
                 Reserved 
               
               
                 1101 
                 SF3 and SF6 
                 SF3 and SF5 
                 Reserved 
               
               
                 1110 
                 SF4 and SF6 
                 SF4 and SF5 
                 Reserved 
               
               
                 1111 
                 SF5 and SF6 
                 Reserved 
                 Reserved 
               
               
                   
               
             
          
         
       
     
     In a second case, for the frame structure shown in  FIG. 2 , the ul grant supports the indication of continuous uplink SFs, and the uplink resource index has three bits. Table 4 lists a combination in the second case. In this combination, one or two uplink SFs are combined into one group. 
     
       
         
               
               
               
               
             
           
               
                 TABLE 4 
               
               
                   
               
               
                   
                 DL: SF0, 
                 DL: SF0, SF6 
                 DL: SF0, SF5~SF6 
               
               
                 Uplink Resource 
                 UL: SF1~SF6 
                 UL: SF1~SF5 
                 UL: SF1~SF4 
               
               
                 Index 
                 (1:6) 
                 (2:5) 
                 (3:4) 
               
               
                   
               
             
             
               
                 000 
                 SF1 
                 SF1 
                 SF1 
               
               
                 001 
                 SF2 
                 SF2 
                 SF2 
               
               
                 010 
                 SF3 
                 SF3 
                 SF3 
               
               
                 011 
                 SF4 
                 SF4 
                 SF4 
               
               
                 100 
                 SF5 
                 SF5 
                 SF1 and SF2 
               
               
                 101 
                 SF6 
                 SF1 and SF2 
                 SF2 and SF3 
               
               
                 110 
                 SF3 and SF4 
                 SF3 and SF4 
                 SF3 and SF4 
               
               
                 111 
                 SF5 and SF6 
                 SF4 and SF5 
                 Reserved 
               
               
                   
               
             
          
         
       
     
     In a third case, for the frame structure shown in  FIG. 1 , the uplink resource index has four bits. For the simplicity of illustration, only the uplink SFs are considered. In addition, for the convenience of illustration, when there is only one uplink SF, the uplink SF is represented as ULSF1; and when there are two uplink SFs, the two uplink SFs are represented as ULSF1 and ULSF2 respectively. The representation of other uplink SFs is similar. Table 5 lists a combination in the third case. 
     
       
         
               
               
               
               
               
               
             
           
               
                 TABLE 5 
               
               
                   
               
               
                 Uplink 
                   
                   
                   
                   
                   
               
               
                 Resource 
                   
                 Three 
                 Two 
                   
                 Zero 
               
               
                 Index 
                 Four ULSFs 
                 ULSFs 
                 ULSFs 
                 One ULSF 
                 ULSF 
               
               
                   
               
             
             
               
                 0000 
                 ULSF1 
                 ULSF1 
                 ULSF1 
                 Reserved 
                 Reserved 
               
               
                 0001 
                 ULSF2 
                 ULSF2 
                 ULSF2 
                 Reserved 
                 Reserved 
               
               
                 0010 
                 ULSF3 
                 ULSF3 
                 ULSF1 
                 Reserved 
                 Reserved 
               
               
                   
                   
                   
                 and 
               
               
                   
                   
                   
                 ULSF2 
               
               
                 0011 
                 ULSF4 
                 ULSF1 
                 Reserved 
                 Reserved 
                 Reserved 
               
               
                   
                   
                 and 
               
               
                   
                   
                 ULSF2 
               
               
                 0100 
                 ULSF1 and 
                 ULSF1 
                 Reserved 
                 Reserved 
                 Reserved 
               
               
                   
                 ULSF2 
                 and 
               
               
                   
                   
                 ULSF3 
               
               
                 0101 
                 ULSF1 and 
                 ULSF2 
                 Reserved 
                 Reserved 
                 Reserved 
               
               
                   
                 ULSF3 
                 and 
               
               
                   
                   
                 ULSF3 
               
               
                 0110 
                 ULSF1 and 
                 Reserved 
                 Reserved 
                 Reserved 
                 Reserved 
               
               
                   
                 ULSF4 
               
               
                 0111 
                 ULSF2 and 
                 Reserved 
                 Reserved 
                 Reserved 
                 Reserved 
               
               
                   
                 ULSF3 
               
               
                 1000 
                 ULSF3 and 
                 Reserved 
                 Reserved 
                 Reserved 
                 Reserved 
               
               
                   
                 ULSF4 
               
               
                 1001 
                 Reserved 
                 Reserved 
                 Reserved 
                 Reserved 
                 Reserved 
               
               
                 1010 
                 Reserved 
                 Reserved 
                 Reserved 
                 Reserved 
                 Reserved 
               
               
                 1011 
                 Reserved 
                 Reserved 
                 Reserved 
                 Reserved 
                 Reserved 
               
               
                 1100 
                 Reserved 
                 Reserved 
                 Reserved 
                 Reserved 
                 Reserved 
               
               
                 1101 
                 Reserved 
                 Reserved 
                 Reserved 
                 Reserved 
                 Reserved 
               
               
                 1110 
                 Reserved 
                 Reserved 
                 Reserved 
                 Reserved 
                 Reserved 
               
               
                 1111 
                 Reserved 
                 Reserved 
                 Reserved 
                 Reserved 
                 Reserved 
               
               
                   
               
             
          
         
       
     
     In a fourth case, for the frame structure shown in  FIG. 1 , the ul grant supports the indication of continuous uplink SFs, and the uplink resource index has three bits. Table 6 lists a combination in the fourth case. 
     
       
         
               
               
               
               
               
               
             
           
               
                 TABLE 6 
               
               
                   
               
               
                 Uplink 
                   
                   
                   
                   
                   
               
               
                 Resource 
                   
                 Three 
                 Two 
                   
                 Zero 
               
               
                 Index 
                 Four ULSFs 
                 ULSFs 
                 ULSFs 
                 One ULSF 
                 ULSF 
               
               
                   
               
             
             
               
                 000 
                 ULSF1 
                 ULSF1 
                 ULSF1 
                 Reserved 
                 Reserved 
               
               
                 001 
                 ULSF2 
                 ULSF2 
                 ULSF2 
                 Reserved 
                 Reserved 
               
               
                 010 
                 ULSF3 
                 ULSF3 
                 ULSF1 
                 Reserved 
                 Reserved 
               
               
                   
                   
                   
                 and 
               
               
                   
                   
                   
                 ULSF2 
               
               
                 011 
                 ULSF4 
                 ULSF1 
                 Reserved 
                 Reserved 
                 Reserved 
               
               
                   
                   
                 and 
               
               
                   
                   
                 ULSF2 
               
               
                 100 
                 ULSF1 and 
                 ULSF2 
                 Reserved 
                 Reserved 
                 Reserved 
               
               
                   
                 ULSF2 
                 and 
               
               
                   
                   
                 ULSF3 
               
               
                 101 
                 ULSF2 and 
                 Reserved 
                 Reserved 
                 Reserved 
                 Reserved 
               
               
                   
                 ULSF3 
               
               
                 110 
                 ULSF3 and 
                 Reserved 
                 Reserved 
                 Reserved 
                 Reserved 
               
               
                   
                 ULSF4 
               
               
                 111 
                 Reserved 
                 Reserved 
                 Reserved 
                 Reserved 
                 Reserved 
               
               
                   
               
             
          
         
       
     
     In Step  502 , the uplink resource index is carried in the ul grant, and the uplink resource index is corresponding to at least one uplink resource. 
     In this embodiment, the ul grant is that of the same user listed in Table 2, and the specific content of the ul grant is shown in Table 7. 
     
       
         
               
             
               
               
               
             
           
               
                 TABLE 7 
               
             
             
               
                   
               
               
                 5 MHz 
               
               
                 UL 
               
             
          
           
               
                   
                 Occupied 
                   
               
               
                 Domain 
                 Bits 
                 Content 
               
               
                   
               
               
                 Resource Grant 
                 9 
                 Continuous physical resource blocks granted 
               
               
                   
                   
                 to a user 
               
               
                 Transmission Format 
                 7 
                 Transmission format indication, modulation 
               
               
                 Indication/Transmission Block Size + 
                   
                 and information bits number and code 
               
               
                 Modulation Code Format 
                   
                 formats 
               
               
                 HARQ 
                 2 
                 Synchronous HARQ: 2-3 bits of serial 
               
               
                   
                   
                 number and implicit confirmation of 
               
               
                   
                   
                 previous transmission blocks 
               
               
                 Power Control 
                 2 
                 Relative instructions 
               
               
                 Pilot Instruction 
                 1 
                 Whether the pilot appears in the last long 
               
               
                   
                   
                 block (from other user terminals) or whether 
               
               
                   
                   
                 the last long block is configured to transmit 
               
               
                   
                   
                 data 
               
               
                 Channel Quality Indication 
                 1 
                 The quality indication report about the 
               
               
                   
                   
                 channel scheduling should be included in the 
               
               
                   
                   
                 data 
               
               
                 ACK/NACK Indication 
                 1 
                 Indicating that the user terminal should 
               
               
                   
                   
                 reserve resources for ACK/NACK on the 
               
               
                   
                   
                 physical uplink synchronous channel 
               
               
                 Multi-antenna Technology 
                 2 
                 Determined by multi-user MIMO and uplink 
               
               
                   
                   
                 multi-antenna technology, 2 bits 
               
               
                 User Terminal Identity + CRC 
                 20  
                 16-24-bit CRC 
               
               
                 Uplink Resource Index 
                 3 or 4 
                 Uplink resource indication 
               
               
                   
               
             
          
         
       
     
     In Step  503 , the ul grant carrying the uplink resource index is sent. 
     In this embodiment, the ul grant carrying the uplink resource index is sent in a downlink SF. 
     In this embodiment, the optimal 3-bit or 4-bit uplink resource index is configured to indicate the uplink SF, and for the convenience of illustration, only the combination of one or two uplink SFs is described. Persons skilled in the art should understand that the embodiment of the present invention is not limited to the corresponding relations between the uplink resource index and the uplink SF in terms of indication listed in Table 3 to Table 7. 
     After receiving the ul grant carrying the uplink resource index from a BS, a user terminal resolves the uplink resource index from the ul grant, and performs the resource grant on the at least one uplink resource corresponding to the uplink resource index according to the corresponding relation between the uplink resource index and the at least one uplink resource in terms of indication obtained in advance. Here, after the BS establishes the corresponding relation in terms of indication, the user terminal may obtain the corresponding relation between the uplink resource index and the at least one uplink resource in terms of indication through static configuration or by dynamically acquiring from the BS. 
     In this embodiment, by carrying the uplink resource index in the ul grant, one ul grant of a user may indicate the resource grant of multiple uplink SFs. Thus, when an asymmetrical resource grant is performed in the TDD mode, especially when the uplink SFs are more than the downlink SFs, the corresponding relation between the ul grant and the uplink SFs can be established. This embodiment realizes accurate indication of the at least one uplink resource through the uplink resource index, prevents repeated transmission of the same information in multiple uplink resources, effectively reduces the signaling overhead, and increases the resource utilization. 
       FIG. 6  is a schematic flow chart of a method for implementing uplink resource indication according to a second embodiment of the present invention. 
     In Step  601 , all uplink resources are grouped in at least one uplink resource set in advance. 
     In this embodiment, all of the uplink resources are grouped into at least one uplink resource set according to the corresponding relation between the downlink SF for sending the ul grant and the uplink SFs in terms of indication. 
     In this embodiment, the frame structure in  FIG. 2  is adopted, and the corresponding relation between the downlink SFs and the uplink SF set in terms of indication listed in Table 8 is set in advance. For example, when the uplink and downlink SF ratio is 4:3, if SF6 is configured to send the ul grant carrying the uplink resource index, the ul grant is directed to SF2; and if SF0 is configured to send the ul grant carrying the uplink resource index, the ul grant is directed to SF3 and SF4. 
     
       
         
               
               
               
               
               
               
               
               
             
           
               
                 TABLE 8 
               
               
                   
               
               
                 Uplink and 
                   
                   
                   
                   
                   
                   
                   
               
               
                 Downlink 
               
               
                 SF Ratio 
               
               
                 (UL:DL) 
                 SF1 
                 SF2 
                 SF3 
                 SF4 
                 SF5 
                 SF6 
                 SF0 
               
               
                   
               
             
             
               
                 4:3 
                 — 
                 — 
                 — 
                 — 
                 SF1 
                 SF2 
                 SF3 and SF4 
               
               
                 5:2 
                 — 
                 — 
                 — 
                 — 
                 — 
                 SF1 and 
                 SF3, SF4, 
               
               
                   
                   
                   
                   
                   
                   
                 SF2 
                 and SF5 
               
               
                 6:1 
                 — 
                 — 
                 — 
                 — 
                 — 
                 — 
                 SF1, SF2, 
               
               
                   
                   
                   
                   
                   
                   
                   
                 SF3, SF4, 
               
               
                   
                   
                   
                   
                   
                   
                   
                 SF5, and 
               
               
                   
                   
                   
                   
                   
                   
                   
                 SF6 
               
               
                   
               
             
          
         
       
     
     In Step  602 , a corresponding relation between an uplink resource index and at least one uplink resource in terms of indication is established. 
     The corresponding relation between the uplink resource index and the at least one uplink resource may be established as follows. The at least one uplink resource in each uplink resource set is combined into one group, and the uplink resources in each group are not completely the same. Each group in the same uplink resource set is corresponding to one uplink resource index, so as to establish the corresponding relation between the uplink resource index and at least one uplink resource in the same uplink resource group in terms of indication. 
     In this embodiment, for the frame structure shown in  FIG. 2 , according to the corresponding relation between the downlink SFs and the uplink SF set listed in Table 8, the uplink resource indexes in different bits are configured to establish the corresponding relation between different uplink resource indexes and at least one uplink SF in terms of indication. Two circumstances are described as follows. 
     In a first case, for the frame structure shown in  FIG. 2 , the uplink resource index has four bits. Table 9 lists a combination in the first case. 
     
       
         
               
               
               
               
             
               
               
               
               
               
               
               
             
               
               
               
               
               
               
             
               
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 9 
               
             
             
               
                   
               
               
                   
                   
                 DL: SF0, SF6 
                 DL: SF0, SF5~SF6 
               
               
                 Uplink 
                 DL: SF0, 
                 UL: SF1~SF5 
                 UL: SF1~SF4 
               
               
                 Resource 
                 UL: SF1~SF6 
                 (2:5) 
                 (3:4) 
               
             
          
           
               
                 Index 
                 (1:6) 
                 SF6 
                 SF0 
                 SF5 
                 SF6 
                 SF0 
               
               
                   
               
             
          
           
               
                 0000 
                 SF1 
                 SF1 
                 SF5 
                 Reserved 
                 SF3 
               
               
                 0001 
                 SF2 
                 SF2 
                 SF3 
                 Reserved 
                 SF4 
               
             
          
           
               
                 0010 
                 SF3 
                 SF1 and 
                 SF4 and 
                 Reserved 
               
               
                   
                   
                 SF2 
                 SF5 
               
               
                 0011 
                 SF4 
                 Reserved 
                 SF4 and 
                 Reserved 
               
               
                   
                   
                   
                 SF3 
               
               
                 0100 
                 SF5 
                 Reserved 
                 SF5 and 
                 Reserved 
               
               
                   
                   
                   
                 SF3 
               
             
          
           
               
                 0101 
                 SF6 
                 Reserved 
                 Reserved 
               
               
                 0110 
                 SF1 and SF2 
                 Reserved 
                 Reserved 
               
               
                 0111 
                 SF1 and SF3 
                 Reserved 
                 Reserved 
               
               
                 1000 
                 SF1 and SF4 
                 Reserved 
                 Reserved 
               
               
                 1001 
                 SF2 and SF4 
                 Reserved 
                 Reserved 
               
               
                 1010 
                 SF2 and SF5 
                 Reserved 
                 Reserved 
               
               
                 1011 
                 SF3 and SF4 
                 Reserved 
                 Reserved 
               
               
                 1100 
                 SF3 and SF5 
                 Reserved 
                 Reserved 
               
               
                 1101 
                 SF3 and SF6 
                 Reserved 
                 Reserved 
               
               
                 1110 
                 SF4 and SF6 
                 Reserved 
                 Reserved 
               
               
                 1111 
                 SF5 and SF6 
                 Reserved 
                 Reserved 
               
               
                   
               
             
          
         
       
     
     In a second case, for the frame structure shown in  FIG. 2 , the ul grant supports the indication of discontinuous uplink SFs, and the uplink resource index has three bits. Table 10 lists a combination in the second case. 
     
       
         
               
               
               
               
             
               
               
               
               
               
               
               
             
               
               
               
               
               
               
             
               
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 10 
               
             
             
               
                   
               
               
                   
                   
                 DL: SF0, SF6 
                 DL: SF0, SF5~SF6 
               
               
                 Uplink 
                 DL: SF0, 
                 UL: SF1~SF5 
                 UL: SF1~SF4 
               
               
                 Resource 
                 UL: SF1~SF6 
                 (2:5) 
                 (3:4) 
               
             
          
           
               
                 Index 
                 (1:6) 
                 SF6 
                 SF0 
                 SF5 
                 SF6 
                 SF0 
               
               
                   
               
             
          
           
               
                 000 
                 SF1 
                 SF1 
                 SF5 
                 Reserved 
                 SF3 
               
               
                 001 
                 SF2 
                 SF2 
                 SF3 
                 Reserved 
                 SF4 
               
             
          
           
               
                 010 
                 SF3 
                 SF1 and SF2 
                 SF4 and 
                 Reserved 
               
               
                   
                   
                   
                 SF5 
               
               
                 011 
                 SF4 
                 Reserved 
                 SF4 and 
                 Reserved 
               
               
                   
                   
                   
                 SF3 
               
               
                 100 
                 SF5 
                 Reserved 
                 SF5 and 
                 Reserved 
               
               
                   
                   
                   
                 SF3 
               
             
          
           
               
                 101 
                 SF6 
                 Reserved 
                 Reserved 
               
               
                 110 
                 SF1 and SF2 
                 Reserved 
                 Reserved 
               
               
                 111 
                 SF1 and SF3 
                 Reserved 
                 Reserved 
               
               
                   
               
             
          
         
       
     
     Certainly, in this embodiment, the frame structure shown in  FIG. 1  may also be adopted. Thereby, the corresponding relation between the downlink SFs and the uplink resource set listed in Table 11 may be set in advance in Step  601 . 
     
       
         
               
               
               
             
           
               
                 TABLE 11 
               
               
                   
               
               
                 Uplink and Downlink SF 
                   
                   
               
               
                 Ratio (DL:UL) 
                 DLSF0 
                 DLSF1 
               
               
                   
               
             
             
               
                 1:4 
                 ULSF0, ULSF1, ULSF2, 
                 — 
               
               
                   
                 and ULSF3 
               
               
                 2:3 
                 ULSF0 and ULSF1 
                 ULSF2 
               
               
                 2:4 
                 ULSF0 and ULSF1 
                 ULSF2 and ULSF3 
               
               
                   
               
             
          
         
       
     
     For the frame structure shown in  FIG. 1 , according to the corresponding relation between the downlink SFs and the uplink SF set listed in Table 11, the uplink resource indexes in different bits are configured to establish the corresponding relation between the uplink resource indexes and at least one uplink SF in terms of indication. Two circumstances are described as follows. 
     In a first case, for the frame structure shown in  FIG. 1 , the ul grant supports the indication of discontinuous uplink SFs, and the uplink resource index has four bits. Table 12 lists a combination in the first case. 
     
       
         
               
               
               
               
             
               
               
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 12 
               
             
             
               
                   
               
               
                   
                   
                 DL: DLSF0~1 
                 DL: DLSF0~1 
               
               
                 Uplink 
                 DL: DLSF0, 
                 UL: ULSF0~2 
                 UL: ULSF0~3 
               
               
                 Resource 
                 UL: ULSF0~3 
                 (2:3) 
                 (2:4) 
               
             
          
           
               
                 Index 
                 (1:4) 
                 DLSF0 
                 DLSF1 
                 DLSF0 
                 DLSF1 
               
               
                   
               
               
                 0000 
                 ULSF1 
                 ULSF0 
                 Reserved 
                 ULSF0 
                 ULSF2 
               
               
                 0001 
                 ULSF2 
                 ULSF1 
                 Reserved 
                 ULSF1 
                 ULSF3 
               
             
          
           
               
                 0010 
                 ULSF3 
                 Reserved 
                 Reserved 
               
               
                 0011 
                 ULSF0 
                 Reserved 
                 Reserved 
               
               
                 0100 
                 ULSF1 and 
                 Reserved 
                 Reserved 
               
               
                   
                 ULSF2 
               
               
                 0101 
                 ULSF1 and 
                 Reserved 
                 Reserved 
               
               
                   
                 ULSF3 
               
               
                 0110 
                 ULSF1 and 
                 Reserved 
                 Reserved 
               
               
                   
                 ULSF0 
               
               
                 0111 
                 ULSF2 and 
                 Reserved 
                 Reserved 
               
               
                   
                 ULSF3 
               
               
                 1000 
                 ULSF3 and 
                 Reserved 
                 Reserved 
               
               
                   
                 ULSF0 
               
               
                 1001 
                 Reserved 
                 Reserved 
                 Reserved 
               
               
                 1010 
                 Reserved 
                 Reserved 
                 Reserved 
               
               
                 1011 
                 Reserved 
                 Reserved 
                 Reserved 
               
               
                 1100 
                 Reserved 
                 Reserved 
                 Reserved 
               
               
                 1101 
                 Reserved 
                 Reserved 
                 Reserved 
               
               
                 1110 
                 Reserved 
                 Reserved 
                 Reserved 
               
               
                 1111 
                 Reserved 
                 Reserved 
                 Reserved 
               
               
                   
               
             
          
         
       
     
     In a second case, for the frame structure shown in  FIG. 1 , the ul grant supports the indication of discontinuous uplink SFs, and the uplink resource index has three bits. Table 13 lists a combination in the second case. 
     
       
         
               
               
               
               
             
               
               
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 13 
               
             
             
               
                   
               
               
                   
                   
                 DL: DLSF0~1 
                 DL: DLSF0~1 
               
               
                 Uplink 
                 DL: DLSF0, 
                 UL: ULSF0~2 
                 UL: ULSF0~3 
               
               
                 Resource 
                 UL: ULSF0~3 
                 (2:3) 
                 (2:4) 
               
             
          
           
               
                 Index 
                 (1:4) 
                 DLSF0 
                 DLSF1 
                 DLSF0 
                 DLSF1 
               
               
                   
               
               
                 000 
                 ULSF1 
                 ULSF0 
                 Reserved 
                 ULSF0 
                 ULSF2 
               
               
                 001 
                 ULSF2 
                 ULSF1 
                 Reserved 
                 ULSF1 
                 ULSF3 
               
             
          
           
               
                 010 
                 ULSF3 
                 Reserved 
                 Reserved 
               
               
                 011 
                 ULSF0 
                 Reserved 
                 Reserved 
               
               
                 100 
                 ULSF1 and ULSF2 
                 Reserved 
                 Reserved 
               
               
                 101 
                 ULSF1 and ULSF3 
                 Reserved 
                 Reserved 
               
               
                 110 
                 ULSF1 and ULSF0 
                 Reserved 
                 Reserved 
               
               
                 111 
                 ULSF2 and ULSF3 
                 Reserved 
                 Reserved 
               
               
                   
               
             
          
         
       
     
     In Step  603 , the uplink resource index is carried in the ul grant, and the uplink resource index is corresponding to at least one uplink resource. 
     In this embodiment, the uplink resource index for indicating the uplink resource is carried in another ul grant. The specific content is shown in Table 14. 
     
       
         
               
               
               
               
               
               
               
               
             
           
               
                 TABLE 14 
               
               
                   
               
               
                   
                 N RA-MAP -bits 
                 16-bits 
                 4-bits 
                 4-bits 
                 1-bit 
                 5-bits 
                 ¾ bits 
               
               
                   
               
             
             
               
                 SIMO-OL TxDiv 
                 Resource 
                 User 
                 First 
                 Second 
                 Reserved 
                 Signaling 
                 Uplink 
               
               
                   
                 grant 
                 terminal 
                 code 
                 code 
                   
                 related to 
                 resource 
               
               
                   
                   
                 identity 
                 word in 
                 word in 
                   
                 HARQ 
                 index 
               
               
                   
                   
                 (CRC) 
                 multiple 
                 multiple 
                   
                   
                 Indicating 
               
               
                   
                   
                   
                 code 
                 code 
                   
                   
                 which 
               
               
                   
                   
                   
                 words 
                 words 
                   
                   
                 frame is 
               
               
                   
                   
                   
                   
                   
                   
                   
                 scheduled 
               
               
                   
                   
                   
                   
                   
                   
                   
                 in the 
               
               
                   
                   
                   
                   
                   
                   
                   
                 TDD 
               
               
                 SIMO-CL TxDiv 
                 Resource 
                 User 
                 First 
                 Second 
                 Precoding 
                 Signaling 
                 Uplink 
               
               
                   
                 grant 
                 terminal 
                 code 
                 code 
                 matrix 
                 related to 
                 resource 
               
               
                   
                   
                 identity 
                 word in 
                 word in 
                 indication 
                 HARQ 
                 index 
               
               
                   
                   
                 (CRC) 
                 multiple 
                 multiple 
                 and 
               
               
                   
                   
                   
                 code 
                 code 
                 selection 
               
               
                   
                   
                   
                 words 
                 words 
               
               
                 SU-MIMO-1CW 
                 Resource 
                 User 
                 First 
                 Second 
                 Precoding 
                 Signaling 
                 Indicating 
               
               
                   
                 grant 
                 terminal 
                 code 
                 code 
                 matrix 
                 related to 
                 which 
               
               
                   
                   
                 identity 
                 word in 
                 word in 
                 indication 
                 HARQ 
                 frame is 
               
               
                   
                   
                 (CRC) 
                 multiple 
                 multiple 
                 and 
                   
                 scheduled 
               
               
                   
                   
                   
                 code 
                 code 
                 selection 
                   
                 in the 
               
               
                   
                   
                   
                 words 
                 words 
                   
                   
                 TDD 
               
               
                 SU-MIMO-2CW 
                 Resource 
                 User 
                 First 
                 Second 
                 Precoding 
                 Signaling 
                 Uplink 
               
               
                   
                 grant 
                 terminal 
                 code 
                 code 
                 matrix 
                 related to 
                 resource 
               
               
                   
                   
                 identity 
                 word in 
                 word in 
                 indication 
                 HARQ 
                 index 
               
               
                   
                   
                 (CRC) 
                 multiple 
                 multiple 
                 and 
               
               
                   
                   
                   
                 code 
                 code 
                 selection 
               
               
                   
                   
                   
                 words 
                 words 
               
               
                 MU-MIMO 
                 Resource 
                 User 
                 First 
                 Second 
                 Precoding 
                 Signaling 
                 Indicating 
               
               
                   
                 grant 
                 terminal 
                 code 
                 code 
                 matrix 
                 related to 
                 which 
               
               
                   
                   
                 identity 
                 word in 
                 word in 
                 indication 
                 HARQ 
                 frame is 
               
               
                   
                   
                 (CRC) 
                 multiple 
                 multiple 
                 and 
                   
                 scheduled 
               
               
                   
                   
                   
                 code 
                 code 
                 selection 
                   
                 in the 
               
               
                   
                   
                   
                 words 
                 words 
                   
                   
                 TDD 
               
               
                 BEAMFORMING 
                 Resource 
                 User 
                 First 
                 Second 
                 Precoding 
                 Signaling 
                 Uplink 
               
               
                   
                 grant 
                 terminal 
                 code 
                 code 
                 matrix 
                 related to 
                 resource 
               
               
                   
                   
                 identity 
                 word in 
                 word in 
                 indication 
                 HARQ 
                 index 
               
               
                   
                   
                 (CRC) 
                 multiple 
                 multiple 
                 and 
               
               
                   
                   
                   
                 code 
                 code 
                 selection 
               
               
                   
                   
                   
                 words 
                 words 
               
               
                   
               
             
          
         
       
     
     In Step  604 , the ul grant carrying the uplink resource index is sent. 
     In this embodiment, all uplink resources are grouped into at least one uplink resource set, the uplink SF set corresponding to the ul grant is preliminarily determined according to the downlink SF for sending the ul grant, and the specific uplink resources are indicated according to the uplink resource index added in the ul grant. 
     In this embodiment, according to the preset corresponding relation between the downlink SFs and the uplink SF set, all of the uplink SFs are grouped into at least one uplink SF set. For uplink slots, according to the preset corresponding relation between the downlink slot and the uplink slot set, all of the uplink SFs are grouped into at least one uplink slot set. In this case, the user terminal needs to obtain the mode for grouping the uplink resource set statically or dynamically, and the indicated uplink resource is determined according to the obtained uplink resource set and the uplink resource index. 
     In the current 3GPP LTE standard, the resource grant is performed in a downlink acknowledgement (DLACK) mode, and the resources are corresponding to the ul grants one by one. When the resource grant of multiple uplink resources is represented by one ul grant, data packets of the uplink resources are corresponding to one acknowledgement channel, which may carry information of only two bits. Therefore, in this embodiment, one ul grant can indicate the resource grant of at most two uplink resources. 
     This embodiment realizes accurate indication of the at least one uplink resource through the uplink resource index, prevents repeated transmission of the same information in multiple uplink resources, effectively reduces the signaling overhead, and increases the resource utilization. 
       FIG. 7  is a schematic structural view of a BS for implementing uplink resource indication according to a third embodiment of the present invention. The BS includes an index carrying module  701  and an instruction sending module  702 . 
     The index carrying module  701  is configured to carry an uplink resource index in a ul grant, in which the uplink resource index is corresponding to at least one uplink resource in terms of indication. 
     The instruction sending module  702  is configured to send the ul grant generated by the index carrying module  701 . 
     The BS further includes a mapping module  703 . 
     The mapping module  703  is configured to establish a corresponding relation between an uplink resource index and at least one uplink resource in terms of indication. 
     This embodiment realizes accurate indication of the at least one uplink resource through the uplink resource index, prevents repeated transmission of the same information in multiple uplink resources, effectively reduces the signaling overhead, and increases the resource utilization. 
       FIG. 8  is a schematic structural view of a user terminal according to a fourth embodiment of the present invention. The user terminal includes an instruction receiving module  801 , an instruction resolving module  802 , and an execution module  803 . 
     The instruction receiving module  801  is configured to receive a ul grant from a BS, in which the ul grant carries an uplink resource index, and the uplink resource index is corresponding to at least one uplink resource in terms of indication. 
     The instruction resolving module  802  is configured to resolve the uplink resource index from the ul grant received by the instruction receiving module  801 . 
     The execution module  803  is configured to obtain the at least one uplink resource corresponding to the uplink resource index resolved by the instruction resolving module  802  according to a corresponding relation between the uplink resource index and the at least one uplink resource in terms of indication obtained in advance, and perform the resource grant on the obtained at least one uplink resource. 
     This embodiment realizes accurate indication of the at least one uplink resource through the uplink resource index, prevents repeated transmission of the same information in multiple uplink resources, effectively reduces the signaling overhead, and increases the resource utilization. 
     As shown in  FIG. 9 , a radio frame is composed by 20 slots, a period of a frame is 10 ms, a frame is divided into two half-frames, each half-frame is composed by five SFs, the first half-frame includes SF0-SF4, and the second half-frame includes SF5-SF9. SF1 and SF6 are respectively formed by a special downlink pilot time slot (DwPTS), a guard period (GP), and an uplink pilot time slot (UpPTS), and serve as transfer points of uplink and downlink SFs. SF6 may also not be configured as a transfer point. Thereby, the entire frame is used as a downlink frame. 
     In the frame structure in the TDD mode, one frame includes several SFs or slots. The SFs may be classified into uplink SFs and downlink SFs, and a TDD system may use a transfer point to transfer the SF types flexibly. For example, in the current 3GPP LTE standard, different SF grant ratios are specified.  FIG. 10  is a schematic view of various uplink and downlink SF ratios in the frame structure shown in  FIG. 9 .  FIG. 10  lists seven configuration results of a frame. The frame includes ten SFs, namely SF0-SF9. In different configurations, the uplink and downlink SF ratios in a frame are different. A table of uplink and downlink SF ratios (Table 15) is concluded from  FIG. 10 . Table 15 lists the circumstances of one and two transfer points. 
     
       
         
               
               
               
             
               
               
               
               
               
               
               
               
               
               
               
               
             
           
               
                 TABLE 15 
               
             
             
               
                   
               
               
                   
                   
                 Uplink and 
               
               
                 Configura- 
                 SF Number 
                 Downlink Ratio 
               
             
          
           
               
                 tion 
                 0 
                 1 
                 2 
                 3 
                 4 
                 5 
                 6 
                 7 
                 8 
                 9 
                 (Downlink:Uplink) 
               
               
                   
               
               
                 0 
                 Downlink 
                 Transfer 
                 Uplink 
                 Uplink 
                 Uplink 
                 Downlink 
                 Transfer 
                 Uplink 
                 Uplink 
                 Uplink 
                 1:3 
               
               
                   
                   
                 point 
                   
                   
                   
                   
                 point 
               
               
                 1 
                 Downlink 
                 Transfer 
                 Uplink 
                 Uplink 
                 Downlink 
                 Downlink 
                 Transfer 
                 Uplink 
                 Uplink 
                 Downlink 
                 2:2 
               
               
                   
                   
                 point 
                   
                   
                   
                   
                 point 
               
               
                 2 
                 Downlink 
                 Transfer 
                 Uplink 
                 Downlink 
                 Downlink 
                 Downlink 
                 Transfer 
                 Uplink 
                 Downlink 
                 Downlink 
                 3:1 
               
               
                   
                   
                 point 
                   
                   
                   
                   
                 point 
               
               
                 3 
                 Downlink 
                 Transfer 
                 Uplink 
                 Uplink 
                 Uplink 
                 Downlink 
                 Downlink 
                 Downlink 
                 Downlink 
                 Downlink 
                 6:3 
               
               
                   
                   
                 point 
               
               
                 4 
                 Downlink 
                 Transfer 
                 Uplink 
                 Uplink 
                 Downlink 
                 Downlink 
                 Downlink 
                 Downlink 
                 Downlink 
                 Downlink 
                 7:2 
               
               
                   
                   
                 point 
               
               
                 5 
                 Downlink 
                 Transfer 
                 Uplink 
                 Downlink 
                 Downlink 
                 Downlink 
                 Downlink 
                 Downlink 
                 Downlink 
                 Downlink 
                 8:1 
               
               
                   
                   
                 point 
               
               
                 6 
                 Downlink 
                 Transfer 
                 Uplink 
                 Uplink 
                 Uplink 
                 Downlink 
                 Transfer 
                 Uplink 
                 Uplink 
                 Downlink 
                 3:5 
               
               
                   
                   
                 point 
                   
                   
                   
                   
                 point 
               
               
                   
               
             
          
         
       
     
       FIG. 11  is a schematic flow chart of a method for implementing uplink resource indication according to a fifth embodiment of the present invention. 
     In Step  1101 , a corresponding relation between an uplink resource index and at least one uplink resource in terms of indication is established. 
     The method for establishing the corresponding relation between the uplink resource index and the at least one uplink resource in terms of indication is as follows. The at least one uplink resource is combined into one group, and the uplink resources in each group are not completely the same. Each group is corresponding to an uplink resource index, so as to establish the corresponding relation between the uplink resource index and the at least one uplink resource in terms of indication. 
     In this embodiment, uplink resource indexes of different bits are used for different frame structures, so different corresponding relations between the uplink resource index and at least one uplink SF can be established. The establishing the corresponding relation between the uplink resource index and the at least one uplink SF in terms of indication in different situations are described in detail below. Persons skilled in the art should understand that only some specific examples of the technical solutions according to the embodiment of the present invention are described below, and the present invention is not limited thereto. 
     For the frame structure shown in  FIG. 10 , the ul grant supports the indication of continuous uplink SFs, and the uplink resource index has three bits. Table 16 lists a combination in a first case. In this combination, one or two uplink SFs are combined into one group. 
     
       
         
               
               
             
           
               
                 TABLE 16 
               
               
                   
               
               
                   
                 Uplink Resources 
               
               
                 Uplink Resource Index 
                 (3 Uplink SFs: SF2~SF4) 
               
               
                   
               
             
             
               
                 000 
                 SF2 
               
               
                 001 
                 SF3 
               
               
                 010 
                 SF4 
               
               
                 011 
                 SF2 and SF3 
               
               
                 100 
                 SF2 and SF4 
               
               
                 101 
                 SF3 and SF4 
               
               
                 110 
                 Reserved 
               
               
                 111 
                 Reserved 
               
               
                   
               
             
          
         
       
     
     In Step  1102 , the uplink resource index is carried in the ul grant, and the uplink resource index is corresponding to at least one uplink resource. 
     In this embodiment, the ul grant is that of the same user listed in Table 2, and the specific content of the ul grant is as listed in Table 17. 
     
       
         
               
             
               
               
               
             
           
               
                 TABLE 17 
               
             
             
               
                   
               
               
                 5 MHz 
               
               
                 UL 
               
             
          
           
               
                   
                 Occupied 
                   
               
               
                 Domain 
                 Bits 
                 Content 
               
               
                   
               
               
                 Resource Grant 
                 9 
                 Continuous physical resource blocks 
               
               
                   
                   
                 granted to a user 
               
               
                 Transmission Format 
                 7 
                 Transmission format indication, modulation 
               
               
                 Indication/Transmission Block 
                   
                 and information bits number and code 
               
               
                 Size + Modulation Code Format 
                   
                 formats 
               
               
                 HARQ 
                 2 
                 Synchronous HARQ: 2-3 bits of serial 
               
               
                   
                   
                 number and implicit confirmation of 
               
               
                   
                   
                 previous transmission blocks 
               
               
                 Power Control 
                 2 
                 Relative instructions 
               
               
                 Pilot Instruction 
                 1 
                 Whether the pilot appears in the last long 
               
               
                   
                   
                 block (from other user terminals) or 
               
               
                   
                   
                 whether the last long block is configured to 
               
               
                   
                   
                 transmit data 
               
               
                 Channel Quality Indication 
                 1 
                 The quality report about the channel 
               
               
                   
                   
                 scheduling should be included in the data 
               
               
                 ACK/NACK Indication 
                 1 
                 Indicating that the user terminal should 
               
               
                   
                   
                 reserve resources for ACK/NACK on the 
               
               
                   
                   
                 physical uplink synchronous channel 
               
               
                 Multi-antenna Technology 
                 2 
                 Determined by multi-user MIMO and 
               
               
                   
                   
                 uplink multi-antenna technology, 2 bits 
               
               
                 User Terminal Identity + CRC 
                 20  
                 16-24-bit CRC 
               
               
                 Uplink Resource Index 
                 3 or 4 
                 Uplink resource indication 
               
               
                   
               
             
          
         
       
     
     In Step  1103 , the ul grant carrying the uplink resource index is sent. 
     In this embodiment, the ul grant carrying the uplink resource index is sent in a downlink SF. 
     In this embodiment, the optimal 3-bit uplink resource index is configured to indicate the uplink SF, and for the convenience of illustration, only the combination of one or two uplink SFs is described. Persons skilled in the art should understand that the embodiment of the present invention is not limited to the corresponding relations between the uplink SF index and the uplink SF in terms of indication listed in Table 3 and Table 4. 
     After receiving the ul grant carrying the uplink resource index from a BS, a user terminal resolves the uplink resource index from the ul grant, and performs the resource grant on the at least one uplink resource corresponding to the uplink resource index according to the corresponding relation between the uplink resource index and the at least one uplink resource in terms of indication obtained in advance. Here, after the BS establishes the corresponding relation in terms of indication, the user terminal may obtain the corresponding relation between the uplink resource index and the at least one uplink resource in terms of indication through static configuration or by dynamically acquiring from the BS. 
     In this embodiment, by carrying the uplink resource index in the ul grant, one ul grant of a user may indicate the resource grant of multiple uplink SFs. Thus, when an asymmetrical resource grant is performed in the TDD mode, especially when the uplink SFs are more than the downlink SFs, the corresponding relation between the ul grant and the uplink SFs can be established. This embodiment realizes accurate indication of the at least one uplink resource through the uplink resource index, prevents repeated transmission of the same information in multiple uplink resources, effectively reduces the signaling overhead, and increases the resource utilization. 
       FIG. 12  is a schematic flow chart of a method for implementing uplink resource indication according to a sixth embodiment of the present invention. 
     In Step  1201 , all uplink resources are grouped in at least one uplink resource set in advance. 
     In this embodiment, all of the uplink resources are grouped into at least one uplink resource set according to the corresponding relation between the downlink SF for sending the ul grant and the uplink SFs in terms of indication. 
     In this embodiment, the frame structure in  FIG. 10  is adopted, and the corresponding relation between the downlink SFs and the uplink SF set in terms of indication listed in Table 18 is set in advance. For example, when the uplink and downlink SF ratio (UL:DL) is 3:1, if SF0 is configured to send the ul grant carrying the uplink resource index, the ul grant is directed to SF4 of the current period and SF2* of the next period; and if SF1 is configured to send the ul grant carrying the uplink resource index, the ul grant is directed to SF2* and SF3* of the next period. 
     
       
         
               
               
               
               
               
               
             
           
               
                 TABLE 18 
               
               
                   
               
               
                 Uplink and 
                   
                   
                   
                   
                   
               
               
                 Downlink SF 
               
               
                 Ratio (UL:DL) 
                 SF0 
                 SF1 
                 SF2 
                 SF3 
                 SF4 
               
               
                   
               
             
             
               
                 3:1 
                 SF4 and SF2* 
                 SF2* and SF3* 
                 — 
                 — 
                 — 
               
               
                   
               
             
          
         
       
     
     In Step  1202 , a corresponding relation between an uplink resource index and at least one uplink resource in terms of indication is established. 
     The corresponding relation between the uplink resource index and the at least one uplink resource may be established as follows. The at least one uplink resource in each uplink resource set is combined into one group, and the uplink resources in each group are not completely the same. Each group in the same uplink resource set is corresponding to one uplink resource index, so as to establish the corresponding relation between the uplink resource index and at least one uplink resource in the same uplink resource group in terms of indication. 
     In this embodiment, according to the corresponding relation between the downlink SF and the uplink SF set, the uplink resource indexes in different bits are configured to establish the corresponding relation between different uplink resource indexes and at least one uplink SF in terms of indication. For example, for the frame structure shown in  FIG. 10 , the uplink resource index has two bits; and according to the corresponding relation listed in Table 18, a combination listed in Table 19 is obtained. 
     
       
         
               
               
               
             
               
               
               
             
           
               
                 TABLE 19 
               
             
             
               
                   
               
               
                   
                 DL: SF0, SF1 
                   
               
               
                   
                 UL: SF2~SF4 
               
               
                 Uplink Resource Index 
                 (DL:UL is 1:3) 
               
             
          
           
               
                 (2 bit) 
                 SF0 
                 SF1 
               
               
                   
               
               
                 00 
                 SF4 
                 SF2* 
               
               
                 01 
                 SF2* 
                 SF3* 
               
               
                 10 
                 SF4 and SF2* 
                 SF2* and SF3* 
               
               
                 11 
                 Reserved 
                 Reserved 
               
               
                   
               
             
          
         
       
     
     In Step  1203 , the uplink resource index is carried in the ul grant, and the uplink resource index is corresponding to at least one uplink resource. 
     In this embodiment, the uplink resource index for indicating the uplink resource is carried in another ul grant. The specific content is shown in Table 20. 
     
       
         
               
               
               
               
               
               
               
               
             
           
               
                 TABLE 20 
               
               
                   
               
               
                   
                 N RA-MAP -bits 
                 16-bits 
                 4-bits 
                 4-bits 
                 1-bit 
                 5-bits 
                 2 bits 
               
               
                   
               
             
             
               
                 SIMO-OL TxDiv 
                 Resource 
                 User 
                 First 
                 Second 
                 Reserved 
                 Signaling 
                 Uplink 
               
               
                   
                 grant 
                 terminal 
                 code 
                 code 
                   
                 related to 
                 resource 
               
               
                   
                   
                 identity 
                 word in 
                 word in 
                   
                 HARQ 
                 index 
               
               
                   
                   
                 (CRC) 
                 multiple 
                 multiple 
                   
                   
                 Indicating 
               
               
                   
                   
                   
                 code 
                 code 
                   
                   
                 which 
               
               
                   
                   
                   
                 words 
                 words 
                   
                   
                 frame is 
               
               
                   
                   
                   
                   
                   
                   
                   
                 scheduled 
               
               
                   
                   
                   
                   
                   
                   
                   
                 in the 
               
               
                   
                   
                   
                   
                   
                   
                   
                 TDD 
               
               
                 SIMO-CL TxDiv 
                 Resource 
                 User 
                 First 
                 Second 
                 Precoding 
                 Signaling 
                 Uplink 
               
               
                   
                 grant 
                 terminal 
                 code 
                 code 
                 matrix 
                 related to 
                 resource 
               
               
                   
                   
                 identity 
                 word in 
                 word in 
                 indication 
                 HARQ 
                 index 
               
               
                   
                   
                 (CRC) 
                 multiple 
                 multiple 
                 and 
               
               
                   
                   
                   
                 code 
                 code 
                 selection 
               
               
                   
                   
                   
                 words 
                 words 
               
               
                 SU-MIMO-1CW 
                 Resource 
                 User 
                 First 
                 Second 
                 Precoding 
                 Signaling 
                 Indicating 
               
               
                   
                 grant 
                 terminal 
                 code 
                 code 
                 matrix 
                 related to 
                 which 
               
               
                   
                   
                 identity 
                 word in 
                 word in 
                 indication 
                 HARQ 
                 frame is 
               
               
                   
                   
                 (CRC) 
                 multiple 
                 multiple 
                 and 
                   
                 scheduled 
               
               
                   
                   
                   
                 code 
                 code 
                 selection 
                   
                 in the 
               
               
                   
                   
                   
                 words 
                 words 
                   
                   
                 TDD 
               
               
                 SU-MIMO-2CW 
                 Resource 
                 User 
                 First 
                 Second 
                 Precoding 
                 Signaling 
                 Uplink 
               
               
                   
                 grant 
                 terminal 
                 code 
                 code 
                 matrix 
                 related to 
                 resource 
               
               
                   
                   
                 identity 
                 word in 
                 word in 
                 indication 
                 HARQ 
                 index 
               
               
                   
                   
                 (CRC) 
                 multiple 
                 multiple 
                 and 
               
               
                   
                   
                   
                 code 
                 code 
                 selection 
               
               
                   
                   
                   
                 words 
                 words 
               
               
                 MU-MIMO 
                 Resource 
                 User 
                 First 
                 Second 
                 Precoding 
                 Signaling 
                 Indicating 
               
               
                   
                 grant 
                 terminal 
                 code 
                 code 
                 matrix 
                 related to 
                 which 
               
               
                   
                   
                 identity 
                 word in 
                 word in 
                 indication 
                 HARQ 
                 frame is 
               
               
                   
                   
                 (CRC) 
                 multiple 
                 multiple 
                 and 
                   
                 scheduled 
               
               
                   
                   
                   
                 code 
                 code 
                 selection 
                   
                 in the 
               
               
                   
                   
                   
                 words 
                 words 
                   
                   
                 TDD 
               
               
                 BEAMFORMING 
                 Resource 
                 User 
                 First 
                 Second 
                 Precoding 
                 Signaling 
                 Uplink 
               
               
                   
                 grant 
                 terminal 
                 code 
                 code 
                 matrix 
                 related to 
                 resource 
               
               
                   
                   
                 identity 
                 word in 
                 word in 
                 indication 
                 HARQ 
                 index 
               
               
                   
                   
                 (CRC) 
                 multiple 
                 multiple 
                 and 
               
               
                   
                   
                   
                 code 
                 code 
                 selection 
               
               
                   
                   
                   
                 words 
                 words 
               
               
                   
               
             
          
         
       
     
     In Step  1204 , the ul grant carrying the uplink resource index is sent. 
     In this embodiment, all uplink resources are grouped into at least one uplink resource set, the uplink SF set corresponding to the ul grant is preliminarily determined according to the downlink SF for sending the ul grant, and the specific uplink resources are indicated according to the uplink resource index added in the ul grant. 
     In this embodiment, according to the preset corresponding relation between the downlink SF and the uplink SF set, all of the uplink SFs are grouped into at least one uplink SF set. For uplink slots, according to the preset corresponding relation between the downlink slot and the uplink slot set in terms of indication, all of the uplink SFs are grouped into at least one uplink slot set. In this case, the user terminal needs to obtain the mode for grouping the uplink resource set statically or dynamically, and the indicated uplink resource is determined according to the obtained uplink resource set and the uplink resource index. 
     In the current 3GPP LTE standard, the resource grant is performed in a DLACK mode, and the resources are corresponding to the ul grants one by one. When the resource grant of multiple uplink resources is represented by one ul grant, data packets of the multiple uplink resources are corresponding to one acknowledgement channel, which may carry information of only two bits. Therefore, in this embodiment, one ul grant can indicate the resource grant of at most two uplink resources. If too many packets are indicated, in the retransmission, the packets cannot be terminated at the same time, which makes the subsequent scheduling more complicated. Therefore, the comprehensive consideration of resource grant of two uplink resources is a reasonable processing mode. 
     This embodiment realizes accurate indication of the at least one uplink resource through the uplink resource index, prevents repeated transmission of the same information in multiple uplink resources, effectively reduces the signaling overhead, and increases the resource utilization. 
     All or a part of the content of the technical solutions according to the embodiments may be implemented through software programming. The software program is stored in a readable storage media, for example, a hard disk, an optical disk, or a floppy disk in a computer. 
     It will be apparent to those skilled in the art that various modifications and variations can be made to the structure of the present invention without departing from the scope or spirit of the invention. In view of the foregoing, it is intended that the present invention cover modifications and variations of this invention provided they fall within the scope of the following claims and their equivalents.