Systems, apparatus and methods for configuration of scheduling policy to facilitate distributed scheduling

Systems, apparatus, methods and computer program products are provided. In some embodiments, a method for configuration of scheduling policy to facilitate distributed scheduling is provided. The method can include receiving configuration information for configuring the scheduling policy for traffic. The scheduling policy can be configured according to a provisioned priority function. The configuration information can be received at a plurality of base stations in a respective plurality of different cells for provisioning a priority function at the plurality of base stations.

BACKGROUND

The following description relates to wireless communications, in general, and to configuration of scheduling policy to facilitate distributed scheduling in wireless communication systems, in particular.

Wireless communication systems are widely deployed to provide various types of communication. For instance, voice and/or data can be provided via such wireless communication systems. A typical wireless communication system, or network, can provide multiple users access to one or more shared resources (e.g., bandwidth, transmit power). For instance, a system can use a variety of multiple access techniques such as Frequency Division Multiplexing (FDM), Time Division Multiplexing (TDM), Code Division Multiplexing (CDM), Orthogonal Frequency Division Multiplexing (OFDM), and others.

Generally, wireless multiple access communication systems can simultaneously support communication for multiple user equipment (UEs). Each UE can communicate with one or more base stations (BSs) via transmissions on forward and reverse links. The forward link (or downlink (DL)) refers to the communication link from BSs to UEs, and the reverse link (or uplink (UL)) refers to the communication link from UEs to BSs.

In macro-cellular networks, the BS, in particular, and the infrastructure, in general, is typically provided by very few vendors. Moreover, BSs manufactured by different vendors are usually not deployed in neighboring cells. Accordingly, the service provided for a selected type of traffic is typically consistent across the BSs for the same designated Quality of Service (QoS).

However, in Femto environments, Femto BSs may be manufactured by multiple vendors but deployed on a single frequency for a given operator. Accordingly, interference management is desirable. Further, while the service provided for a selected type of traffic should be the same across vendors, different vendors may provide different service according to the manner in which the schedulers at the different BSs are configured. To improve the likelihood of consistency in service across different BSs, synchronizing the prioritization mechanisms across the different BSs can be employed. Accordingly, configuration of scheduling policy across BSs for distributed scheduling is desirable.

SUMMARY

In accordance with one or more embodiments and corresponding disclosure thereof, various aspects are described in connection with configuration of scheduling policy to facilitate distributed scheduling in wireless communication systems.

According to related aspects, a method is provided. In some embodiments, the method can include receiving configuration information to provision a priority function for configuring the scheduling policy for traffic. The configuration information to provision a priority function for configuring the scheduling policy for traffic can be received at a plurality of base stations in a respective plurality of different cells. The configuration information can be for provisioning the priority function for configuring the scheduling policy for traffic at each of the plurality of base stations in the respective plurality of different cells.

According to other related aspects, a computer program product is provided. The computer program product can include a computer-readable medium including a first set of codes for causing a computer to receive configuration information to provision a priority function for configuring the scheduling policy for traffic. The configuration information to provision a priority function for configuring the scheduling policy for traffic can be received at a plurality of base stations in a respective plurality of different cells. The configuration information can be for provisioning the priority function for configuring the scheduling policy for traffic at each of the plurality of base stations in the respective plurality of different cells.

According to other related aspects, an apparatus is provided. The apparatus can include means for receiving configuration information to provision a priority function for configuring the scheduling policy for traffic. The configuration information to provision a priority function for configuring the scheduling policy for traffic can be received at a plurality of base stations in a respective plurality of different cells. The configuration information can be for provisioning the priority function for configuring the scheduling policy for traffic at each of the plurality of base stations in the respective plurality of different cells.

According to yet other related aspects, another apparatus is provided. The apparatus can include a base station provisioning interface configured to receive configuration information to provision a priority function for configuring the scheduling policy for traffic. The configuration information to provision a priority function for configuring the scheduling policy for traffic can be received at a plurality of base stations in a respective plurality of different cells. The configuration information can be for provisioning the priority function for configuring the scheduling policy for traffic at each of the plurality of base stations in the respective plurality of different cells.

According to other aspects, a method for configuration of scheduling policy to facilitate distributed scheduling is provided. The method can include transmitting configuration information to provision a priority function for configuring a scheduling policy for traffic. The configuration information can be transmitted to a plurality of BSs in a respective plurality of different cells for provisioning the priority function at each of the plurality of BSs.

According to yet other aspects, another computer program product is provided. The computer program product includes a computer-readable medium. The computer-readable medium can include a first set of codes for causing a computer to transmit configuration information to provision a priority function for configuring a scheduling policy for traffic. The configuration information can be transmitted to a plurality of BSs in a respective plurality of different cells for provisioning the priority function at each of the plurality of BSs.

According to other aspects, another apparatus is provided. The apparatus can include means for transmitting configuration information to provision a priority function for configuring a scheduling policy for traffic. The configuration information can be transmitted to a plurality of BSs in a respective plurality of different cells for provisioning the priority function at each of the plurality of BSs.

According to yet other aspects, another apparatus is provided. The apparatus can include a controller provisioning interface configured to transmit configuration information to provision a priority function for configuring a scheduling policy for traffic. The configuration information can be transmitted to a plurality of BSs in a respective plurality of different cells for provisioning the priority function at each of the plurality of BSs.

DETAILED DESCRIPTION

The techniques described herein can be used for various wireless communication systems such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), single carrier-frequency division multiple access (SC-FDMA) and/or other systems. The terms “system” and “network” are often used interchangeably. A CDMA system can implement a radio technology such as Universal Terrestrial Radio Access (UTRA), CDMA8020, etc. UTRA includes Wideband-CDMA (W-CDMA) and other variants of CDMA. CDMA8020 covers IS-8020, IS-95 and IS-856 standards. An OFDMA system can implement a radio technology such as Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, etc. UTRA and E-UTRA are part of Universal Mobile Telecommunication System (UMTS). 3GPP Long Term Evolution (LTE) is an upcoming release of UMTS that uses E-UTRA, which employs OFDMA on the downlink and SC-FDMA on the uplink. UTRA, E-UTRA, UMTS, LTE and GSM are described in documents from an organization named “3rd Generation Partnership Project” (3GPP). Additionally, CDMA8020 and UMB are described in documents from an organization named “3rd Generation Partnership Project 2” (3GPP2). Further, such wireless communication systems can additionally include peer-to-peer (e.g., mobile-to-mobile) ad hoc network systems often using unpaired unlicensed spectrums, 802.xx wireless LAN, BLUETOOTH and any other short- or long-range, wireless communication techniques.

Single carrier frequency division multiple access (SC-FDMA) utilizes single carrier modulation and frequency domain equalization. SC-FDMA can have similar performance and essentially the same overall complexity as those of an OFDMA system. A SC-FDMA signal can have lower peak-to-average power ratio (PAPR) because of its inherent single carrier structure. SC-FDMA can be used, for instance, in uplink communications where lower PAPR greatly benefits UEs in terms of transmit power efficiency. Accordingly, SC-FDMA can be implemented as an uplink multiple access scheme in 3GPP Long Term Evolution (LTE) or Evolved UTRA.

Furthermore, various embodiments are described herein in connection with UEs. A UE can also be called a system, subscriber unit, subscriber station, mobile station, mobile, remote station, remote terminal, mobile device, access terminal, wireless communication device, user agent or user device. A UE can be a cellular telephone, a cordless telephone, a Session Initiation Protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device having wireless connection capability, computing device, or other processing device connected to a wireless modem. Moreover, various embodiments are described herein in connection with a BS or access node (AN). A BS can be utilized for communicating with UEs and can also be referred to as an access point, BS, Femto node, Pico Node, Node B, Evolved Node B (eNodeB, eNB) or some other terminology.

In some aspects the teachings herein may be employed in a network that includes macro scale coverage (e.g., a large area cellular network such as a 3G networks, typically referred to as a macro cell network) and smaller scale coverage (e.g., a residence-based or building-based network environment). A UE moves through such a network. The UE may be served in certain locations by BSs that provide macro coverage while the UE may be served at other locations by BSs that provide smaller scale coverage. In some aspects, the smaller coverage nodes may be used to provide incremental capacity growth, in-building coverage, and different services (e.g., for a more robust user experience). In the discussion herein, a node that provides coverage over a relatively large area may be referred to as a Macro node. A node that provides coverage over a relatively small area (e.g., a residence) may be referred to as a Femto node. A node that provides coverage over an area that is smaller than a macro area and larger than a Femto area may be referred to as a Pico node (e.g., providing coverage within a commercial building).

A cell associated with a Macro node, a Femto node, or a Pico node may be referred to as a macro cell, a Femto cell, or a Pico cell, respectively. In some implementations, each cell may be further associated with (e.g., divided into) one or more sectors.

In various applications, other terminology may be used to reference a Macro node, a Femto node, or a Pico node. For example, a Macro node may be configured or referred to as a BS, access point, eNodeB, macro cell, and so on. Also, a Femto node may be configured or referred to as a Home NodeB, Home eNodeB, access point access node, a BS, a Femto cell, and so on.

FIG. 1is an illustration of an example wireless communication system providing configuration of scheduling policy for facilitating distributed scheduling in accordance with various aspects set forth herein. In wireless communication system100, interference caused by transmissions on the UL can be managed by the BS102while interference caused by transmissions on the DL can be managed by the UEs116,122.

Referring now toFIG. 1, a wireless communication system100is illustrated in accordance with various embodiments presented herein. System100includes a BS102that can include multiple antenna groups. For example, one antenna group can include antennas104,106, another group can comprise antennas108,110, and an additional group can include antennas112,114. Two antennas are illustrated for each antenna group; however, more or fewer antennas can be utilized for each group. BS102can additionally include a transmitting node chain and a receiving node chain, each of which can in turn comprise a plurality of components associated with signal transmission and reception (e.g., processors, modulators, multiplexers, demodulators, demultiplexers, antennas), as will be appreciated by one skilled in the art.

BS102can communicate with one or more UEs such as UE116,122. However, it is to be appreciated that BS102can communicate with substantially any number of UEs similar to UEs116,122. UEs116,122can be, for example, cellular phones, smart phones, laptops, handheld communication devices, handheld computing devices, satellite radios, global positioning systems, PDAs, and/or any other suitable device for communicating over wireless communication system100. As depicted, UE116is in communication with antennas112,114, where antennas112,114transmit information to UE116over DL118and receive information from UE116over a UL120. Moreover, UE122is in communication with antennas104,106, where antennas104,106transmit information to UE122over a DL124and receive information from UE122over a UL126. In a frequency division duplex (FDD) system, DL118can utilize a different frequency band than that used by UL120, and DL124can employ a different frequency band than that employed by UL126, for example. Further, in a time division duplex (TDD) system, DL118and UL120can utilize a common frequency band and DL124and UL126can utilize a common frequency band.

Each group of antennas and/or the area in which they are designated to communicate can be referred to as a sector of BS102. For example, antenna groups can be designed to communicate to UEs in a sector of the areas covered by BS102. In communication over DLs118,124, the transmitting antennas of BS102can utilize beamforming to improve signal-to-noise ratio of DLs118,124for UEs116,122. Also, while BS102utilizes beamforming to transmit to UEs116,122scattered randomly through an associated coverage, UEs116,122in neighboring cells can be subject to less interference as compared to a BS transmitting through a single antenna to all its UEs. Further, the BS102and UEs116,122can be configured providing configuration of scheduling policy for facilitating distributed scheduling as described herein.

FIG. 2is an illustration of another example wireless communication system providing configuration of scheduling policy for facilitating distributed scheduling for a number of users in accordance with various aspects set forth herein. The system200provides communication for multiple cells202, such as, for example, macro cells202A-202G, with each cell being serviced by a corresponding BS204(e.g., BS204A-204G). As shown inFIG. 2, UE206(e.g., UEs206A-206L) can be dispersed at various locations throughout the system over time. Each UE206can communicate with one or more BS204on a DL or a UL at a given moment, depending upon whether the UE206is active and whether it is in soft handoff, for example. The wireless communication system200may provide service over a large geographic region. For example, macro cells202A-202G may cover a few blocks in a neighborhood.

FIG. 3is an illustration of an example wireless communication system where one or more Femto nodes are deployed providing configuration of scheduling policy for facilitating distributed scheduling in accordance with various aspects set forth herein. Specifically, the system300includes multiple Femto nodes310(e.g., Femto nodes310A and310B) installed in a relatively small scale network environment (e.g., in one or more user residences330). Each Femto node310can be coupled to a wide area network340(e.g., the Internet) and a mobile operator core network350via a DSL router, a cable modem, a wireless link, or other connectivity means (not shown). As will be discussed below, each Femto node310can be configured to serve associated UEs (e.g., associated UE320A) and, optionally, alien UEs (e.g., alien UE320B). In other words, access to Femto nodes310may be restricted whereby a given UE320can be served by a set of designated (e.g., home) Femto node(s)310but may not be served by any non-designated Femto nodes310(e.g., a neighbor's Femto node310).

However, in various embodiments, an associated UE320A can experience interference on the DL from a Femto node310serving an alien UE320B. Similarly, a Femto node310associated with associated UE320A can experience interference on the UL from the alien UE320B. In embodiments, interference management can be facilitated in the system300as described herein.

FIG. 4is an illustration of an example coverage map in a wireless communication system providing configuration of scheduling policy for facilitating distributed scheduling in accordance with various aspects set forth herein. The coverage map400can include several tracking areas402(or routing areas or location areas), each of which can include several macro coverage areas. In the embodiment shown, areas of coverage associated with tracking areas402A,402B, and402C are delineated by the wide lines and the macro coverage areas404are represented by the hexagons. The tracking areas402A,402B, and402C can include Femto coverage areas406. In this example, each of the Femto coverage areas406(e.g., Femto coverage area406C) is depicted within a macro coverage area404(e.g., macro coverage area404B). It should be appreciated, however, that a Femto coverage area406may not lie entirely within a macro coverage area404. In practice, a large number of Femto coverage areas406can be defined with a given tracking area402or macro coverage area404. Also, one or more Pico coverage areas (not shown) can be defined within a given tracking area402or macro coverage area404.

Referring again toFIG. 3, the owner of a Femto node310can subscribe to mobile service, such as, for example, 3G mobile service, offered through the mobile operator core network350. In addition, a UE320may be capable of operating both in macro environments and in smaller scale (e.g., residential) network environments. In other words, depending on the current location of the UE320, the UE320may be served by an access node360of the mobile operator core network350or by any one of a set of Femto nodes310(e.g., the Femto nodes310A and310B that reside within a corresponding user residence330). For example, when a subscriber is outside his home, he is served by a standard macro access node (e.g., node360) and when the subscriber is at home, he is served by a Femto node (e.g., node310A). Here, it should be appreciated that a Femto node310may be backward compatible with existing UEs320.

A Femto node310may be deployed on a single frequency or, in the alternative, on multiple frequencies. Depending on the particular configuration, the single frequency or one or more of the multiple frequencies can overlap with one or more frequencies used by a Macro node (e.g., node360).

In some aspects, a UE320can be configured to connect to a preferred Femto node (e.g., the home Femto node of the UE320) whenever such connectivity is possible. For example, whenever the UE320is within the user residence330, it may be desired that the UE320communicate only with the home Femto node310.

In some aspects, if the UE320operates within the mobile operator core network350but is not residing on its most preferred network (e.g., as defined in a preferred roaming list), the UE320may continue to search for the most preferred network (e.g., the preferred Femto node310) using a Better System Reselection (BSR), which can involve a periodic scanning of available systems to determine whether better systems are currently available, and subsequent efforts to associate with such preferred systems. With the acquisition entry, the UE320may limit the search for specific band and channel. For example, the search for the most preferred system may be repeated periodically. Upon discovery of a preferred Femto node310, the UE320selects the Femto node310for camping within its coverage area.

A Femto node may be restricted in some aspects. For example, a given Femto node may only provide certain services to certain UEs. In deployments with so-called restricted (or closed) association, a given UE may only be served by the macro cell mobile network and a defined set of Femto nodes (e.g., the Femto nodes310that reside within the corresponding user residence330). In some implementations, a node may be restricted to not provide, for at least one node, at least one of: signaling, data access, registration, paging, or service.

In some aspects, a restricted Femto node (which may also be referred to as a Closed Subscriber Group Home NodeB) is one that provides service to a restricted provisioned set of UEs. This set may be temporarily or permanently extended as necessary. In some aspects, a Closed Subscriber Group (CSG) may be defined as the set of BSs (e.g., Femto nodes) that share a common access control list of UEs. A channel on which all Femto nodes (or all restricted Femto nodes) in a region operate may be referred to as a Femto channel.

Various relationships may thus exist between a given Femto node and a given UE. For example, from the perspective of a UE, an open Femto node may refer to a Femto node with no restricted association. A restricted Femto node may refer to a Femto node that is restricted in some manner (e.g., restricted for association and/or registration). A home Femto node may refer to a Femto node on which the UE is authorized to access and operate on. A guest Femto node may refer to a Femto node on which a UE is temporarily authorized to access or operate on. An alien Femto node may refer to a Femto node on which the UE is not authorized to access or operate on, except for perhaps emergency situations (e.g., 911 calls).

From a restricted Femto node perspective, a home UE may refer to a UE that authorized to access the restricted Femto node. A guest UE may refer to a UE with temporary access to the restricted Femto node. An alien UE may refer to a UE that does not have permission to access the restricted Femto node, except for perhaps emergency situations, for example, such as 911 calls (e.g., a UE that does not have the credentials or permission to register with the restricted Femto node).

While the description ofFIG. 4has been provided with reference to a Femto node, it should be appreciated, that a Pico node may provide the same or similar functionality for a larger coverage area. For example, a Pico node may be restricted, a home Pico node may be defined for a given UE, and so on.

A wireless multiple-access communication system can simultaneously support communication for multiple wireless UEs. As mentioned above, each UE can communicate with one or more BSs via transmissions on the DL or the UL. These communication links (i.e., DL and UL) may be established via a single-in-single-out system, a multiple-in-multiple-out (MIMO) system, or some other type of system.

A MIMO system can support TDD and FDD. In a TDD system, the DL and UL transmissions can be on the same frequency region so that the reciprocity principle allows the estimation of the DL channel from the UL. This enables the BS to transmit beam-forming gain on the DL when multiple antennas are available at the BS. In some embodiments, the channel conditions of the UL channel can be estimated from the DL channel, for interference management, as described herein.

FIG. 5is an illustration of an example block diagram of a wireless communication system providing configuration of scheduling policy for facilitating distributed scheduling in accordance with various aspects set forth herein.

The system500can include one or more BSs502,506,508in respective cells of system500, and at least one controller503. In some embodiments, the BSs502,506,508can be BSs located in one or more different cells. In some embodiments, one or more of BSs502,506,508can be Femto access nodes configured to provide communication to and from a UE in the Femto cell managed by the Femto access node. the BSs502,506,508can be manufactured by one or more different vendors in various embodiments. In some embodiments when the BSs502,506,508are manufactured by different vendors, the BSs502,506,508can be configured by the manufacturer in a manner that cause the BSs502,506,508to operate to provide one or more different scheduling policies for a similar type of traffic. The configuration information provided by the controller provisioning interface512to the BS provisioning interfaces519,513,520can cause the BSs502,506,508to operate to provide a similar scheduling policy for a similar type of traffic upon configuration by the BS502,506,508.

The controller503can be configured to define and/or provision the parameters in the BSs502,506,508. In some embodiments, the controller503can be configured to determine configuration information that can be provided to the BSs502,506,508to configure scheduling policy at the BSs502,506,508. The scheduling policy at the BSs502,506,508can enable the BSs502,506,508to provide similar scheduling of traffic, across BSs502,506,508for traffic having a similar associated priority metric, quality of service (QoS), Quality of Service Class Identifier (QCI) parameter and/or traffic type.

The BSs502,506,508can include BS provisioning interfaces519,513,520, respectively, and the controller503can include a controller provisioning interface512. In some embodiments, the controller provisioning interface512can be configured to generate and/or output configuration information to the BSs provisioning interfaces519,513,520for configuring the scheduling policy at the BSs502,506,508.

BS provisioning interfaces519,513,520can differ in structure and/or functionality from controller provisioning interface512. Similarly, BS provisioning interfaces519,513,520can differ according to the functionality with which the associated BS is configured. For example, if BS506and BS502are manufactured by different vendors, BS provisioning interface513and BS provisioning interface519can differ in functionality and structure. By way of example, but not limitation, BS provisioning interface513and BS provisioning interface519can be configured by the manufacturer with two different priority functions and therefore map similar traffic parameters (e.g., average rate, queue length and/or head of line (HOL) delay) to two different priority metrics. Accordingly, the BSs506,502may schedule similar traffic differently as the BSs506,502may schedule the traffic according to the priority metric for the traffic.

For example, the priority function that maps the average rate, queue length and/or HOL delay to a priority metric can differ from BS502to BS506. Therefore, the priority metric that may be mapped to BS502can be a first value that is higher than the priority metric that is mapped to BS506while BS506has higher priority traffic.

Nonetheless, BS provisioning interface513and BS provisioning interface519can receive configuration information from controller provisioning interface512that can enable BS506and BS502to provide similar service for traffic having a similar associated priority metric, QoS, Quality of Service Class Identifier (QCI) parameter and/or traffic type.

In some embodiments, the controller provisioning interface512and/or one or more of the BS provisioning interfaces519,513,520, can be configured to perform one or more of the functions for configuration of scheduling policy described herein with reference to the systems, methods, apparatus and/or computer program products. By way of example, but not limitation, the functions for configuration of scheduling policy can include computing and/or determining priority metrics, parametric or tabular priority functions, evaluating QoS and/or QCI parameters, providing slow time scale or fast time scale resource allocation, determining buffer state information, average delay, average arrival rate, average service rate, and/or average queue length associated with traffic at or intended for the BSs502,506,508, scheduling traffic at or intended for BSs502,506,508, mapping one or more parameters related to the traffic at or intended for BSs502,506,508to a priority metric and/or to a priority function and/or determining a priority metric based on at least a priority function.

The BSs502,506,508can include processors521,515,522, respectively. The controller503can include a processor514. Processors521,515,522,514can be configured to perform one or more of the functions described herein with reference to any of the systems, methods, apparatus and/or computer program products.

The BSs502,506,508can include memory523,517,524, respectively, and the controller503can include a memory516. The memory523,517,524,516can be for storing computer-executable instructions and/or information for performing the functions described herein with reference to any of the systems, methods, apparatus and/or computer program products.

The BSs502,506,508can include transceivers511,530,518, respectively. The controller503can include a transceiver510. Transceivers511,530,518,510dcan be configured to transmit and/or receive configuration information, control information, data and/or any other type of information described herein with reference to any of the systems, methods, apparatus and/or computer program products.

In some embodiments, the controller provisioning interface512can transmit to the BSs502,506,508, configuration information for configuring the corresponding BS provisioning interfaces519,513,520. While the following description is provided for BS502, the description can apply for any one of BSs502,506,508.

A BS502, for example, that receives the configuration information, can configure the BS provisioning interface519, to map one or more parameters associated with traffic at the BS502to a priority function. The one or more parameters can include, but are not limited to, QoS parameters and/or QCI parameters (when system500is an LTE system). The priority function can be a function of acceptable error rates for the traffic, delays for the traffic, traffic packets transmitted or received and/or traffic packet throughput and/or any information indicative of a QoS of traffic including, but not limited to, instantaneous and/or average HOL delay, packet delay, queue length, packet sizes, and/or average rate at which the queue has been served in the past.

The BS provisioning interface519can be configured to employ one or more of two different types of priority functions. For example, the BS provisioning interface519can be configured to employ a parametric priority function (or a class of parametric priority functions) and/or a tabular priority function. Equation one is an example of a parametric priority function that can be employed by the BS provisioning interface519for an LTE system using QCI parameters:
w1xa+w2log(x)+w3D+w4q+w5exp(D/w6)+w7exp(q/w8)+w9log(D)+w10log(q)  (1)
where x is an average rate of serving the queue, D is an HOL delay, and/or q is a queue length, and, in an LTE system, a and wiare constants configured as functions of the QCI parameters. One or more of the BSs502,506,508can employ the parametric priority function to provide similar scheduling of similar traffic. In some embodiments, the parametric function can be employed by all BSs502,506,508in the system500. In these embodiments, all BSs502,506,508each implement the same scheduler.

Equation one is one embodiment of a parametric priority function for mapping parameters associated with a buffer at the BS502to a priority metric for the traffic in the buffer. In other embodiments, more general priority functions can be used. By way of example, but not limitation, the priority function can include any number of functions to determine a priority of traffic for the UE. The functions can include, but are not limited to, those that utilize: the instantaneous HOL delay for the queue at the BS502, delays of various packets in the queue at the BS502, queue length at the BS502, packet sizes in the queue at the BS502, and/or the average rate at which the queue at the BS502has been served in the past.

In some embodiments, the priority function can be a generic numerical function. For example, the generic numerical function can be specified as a table of values. By way of example, but not limitation, with reference to equation one, the values can include values for x, q and/or D.

In some embodiments, the mapping to the priority function can vary depending on the QCI parameters. For example, in some embodiments, logical channel (LC) and/or logical channel groups (LCGs) with different QCI parameters could have different mappings to priority metrics.

In some embodiments, the BS provisioning interface519can employ strict priority scheduling between classes of traffic transmitted from the BS502. The BSs502,506,508can provision the priority function for strict priority scheduling based on configuration information received from controller503.

By way of example, but not limitation, one or more different parameterizations of the priority function can be used to allow for strict priority in scheduling. For strict priority scheduling, between transmissions of traffic, a threshold for acceptable transmit power level for an interfering BS transmission can be determined. The interfering BS can be required to maintain transmit power levels below the threshold to improve the likelihood of an acceptable signal-to-interference and noise ratio (SINR) in the system500.

The amount of SINR that is deemed as acceptable can differ for different types of traffic. By way of example, but not limitation, in some embodiments, a relatively high SINR can be designated to be provided for high priority traffic to enable the system500to achieve the QoS level associated with the traffic type. One or more of the BSs502,506,508can employ the strict priority scheduling to provide similar scheduling of similar traffic.

In some embodiments, the BS provisioning interface519can employ priority functions that incorporate slow time scale resource allocation to generate priority metrics. In these embodiments, the transmit power level and/or spectrum resources allocated to one or more different cells by the controller503can be adapted at a slow time scale. The priority function can depend on the QCI parameters and slow time scale information. In this embodiment, the priority function can depend on QCI parameters and slow time scale information such as average delay, average arrival rate, average service rate, and/or average queue length at the BS502. The priority function can be parametric or tabular.

In some embodiments, instead of or in addition to a parametric priority function, the BS provisioning interface519can be configured to employ a tabular priority function. In some embodiments, the BSs502,506,508can provision the tabular priority function based on configuration information received from controller503.

The tabular priority function can be a generic numerical function that can be specified as a table that maps values of x, q and/or D to priority metric values. The mapping can differ, in some embodiments, based on the QCI parameters. Accordingly, different LCs and/or LCGs having different QCI parameters can have different mappings to a priority metric albeit the BS provisioning interface519is configured with the same table including the different values composing the tabular priority function. One or more of the BSs502,506,508can employ the tabular priority function to provide similar scheduling of similar traffic.

In some embodiments, to simplify the processing at the BSs502,506,508, the number of parameters evaluated to map to a priority function can be reduced from that shown in equation one. By way of example, but not limitation, the number of parameters can be reduced to one to three parameters. For example, the parameters can include HOL delay, average rate of the queue and/or the queue length at BS502,506,508. In some embodiments, the parameters can be any QCI and/or QoS parameters that can be evaluated to map to a priority function.

The BSs502,506,508can numerically provision a three-dimensional priority function that maps the numerical values of the one or more parameters to a priority metric. The BSs502,506,508can provision the priority function based on configuration information received from controller503. The priority metric can be a fourth dimension that is based on the values for the parameters.

In some embodiments, the three-dimensional priority function can be tabular and specified as a table of values for the one to three different parameters. For example, the values for the parameters can be represented as quantized points on a grid where the quantized points represent quantized values of values in the table.

FIG. 6is an illustration of an example of a flowchart of a method providing configuration of scheduling policy for facilitating distributed scheduling in accordance with various aspects set forth herein. The method600can provide configuration of scheduling policy for facilitating distributed scheduling.

At610, method600can include receiving configuration information to provision a priority function for configuring the scheduling policy for traffic. In some embodiments, the configuration information can be received at a plurality of BSs in a respective plurality of different cells. With reference toFIG. 5, by way of example, but not limitation, the configuration information can be received at one or more of BSs502,506,508. The configuration information can be for configuring the scheduling policy for traffic at each of the BSs502,506,508.

At620, method600can include determining one or more parameters indicative of the traffic to be transmitted from the BSs502,506,508.

At630, method600can include configuring the priority function based on at least one or more parameters indicative of the traffic to be transmitted from BSs502,506,508. In some embodiments, the one or more parameters indicative of the traffic can be QoS parameters. In some embodiments, the QoS parameters are QCI parameters. In these embodiments, the priority function can be a parametric priority function having one or more constants configured as a function of the QCI parameters.

In some embodiments, at least one of the one or more parameters indicative of the traffic can be an average rate of serving a queue at one of the BSs502,506,508, a head of line delay at one of the BSs502,506,508or a queue length at one of the BSs502,506,508.

In some embodiments, the traffic can be associated with one of one or more logical channels, and the priority function can be configured for the one or more logical channels.

At640, method600can include generating a priority metric for the traffic to be transmitted from the BSs502,506,508based on at least one or more values of the one or more parameters indicative of the traffic and/or on the priority function.

At650, method600can include determining transmission power levels based on the priority function and/or channel gains of serving links and interfering links of the BSs502,506,508.

In one embodiment, the priority function can be a parametric priority function. One or more different parameterizations of the parametric priority function can allow the BSs502,506,508to provide strict priority scheduling of the traffic wherein interfering traffic from an interfering BS can be scheduled for transmission if an interference caused by the interfering traffic is below a selected threshold. In some embodiments, the threshold is an SINR. The selected threshold and/or SINR can be a first value if a priority of the traffic is a first priority and a second value if a priority of the traffic is a second priority. The first value can be greater than the second value if the first priority is higher than the second priority.

In some embodiments, the priority function can be a tabular priority function. In these embodiments, generating the priority metric for the traffic based on at least one or more values of the one or more parameters indicative of the traffic at step640can include mapping the at least one or more values of the one or more parameters indicative of the traffic to the priority metric.

In various embodiments, the one or more parameters indicative of the traffic can include one or more of: head of line delay at one of the BSs502,506,508, an average rate of a queue at one of the BSs502,506,508, an average channel state on which the traffic can be scheduled to be transmitted, a packet error rate associated with a packet including the traffic, a queue length at one of the BSs502,506,508, an average rate of a queue at one of the BSs502,506,508, a size of a packet including the traffic, a queue length at one of the BSs502,506,508, a channel gain over a serving communication link, a channel gain over a cross communication link or an average rate at which a queue at one of the BSs502,506,508has been served over a past time interval.

FIG. 7is an illustration of an example of a flowchart of a method providing configuration of scheduling policy for facilitating distributed scheduling in accordance with various aspects set forth herein. At710, method700can include transmitting configuration information to provision a priority function for configuring the scheduling policy for traffic. The configuration information can be transmitted to a plurality of BSs in a respective plurality of different cells. The configuration information can be for provisioning the priority function at each of the plurality of BSs. With reference toFIG. 5, in some embodiments, the configuration information can be for provisioning the priority function at the BSs502,506,508.

In some embodiments, the traffic can be associated with one or more LCs. In these embodiments, the priority function can be configured for one or more of the LCs.

In some embodiments, one or more parameters are indicative of the traffic. In these embodiments, the priority function can be based on the parameters indicative of the traffic.

In some embodiments, the priority function can be a parametric priority function having one or more constants. At720, the method700can include transmitting one or more values corresponding to the one or more constants of the parametric priority function. The one or more constants can be employed in the parametric priority function to generate a priority metric according to which the traffic can be scheduled.

In some embodiments, one or more different parameterizations of the parametric priority function can enable the BSs502,506,508to provide strict priority scheduling of the traffic of different classes. To provide strict scheduling of the traffic, interfering traffic can be scheduled for transmission if an interference caused by the interfering traffic is below a selected threshold.

In some embodiments, the priority function can be a tabular priority function. In these embodiments, the priority metric can be generated based on mapping one or more values of the parameters to the priority metric.

In various embodiments, the parameters can include one or more of: head of line delay at BSs502,506,508, an average rate of a queue at BSs502,506,508, an average channel state on which the traffic can be scheduled to be transmitted, a packet error rate associated with a packet including the traffic, a queue length at BSs502,506,508, an average rate of a queue at BSs502,506,508, a size of a packet including the traffic, a queue length at BSs502,506,508, a channel gain over a serving communication link, a channel gain over a cross communication link or an average rate at which a queue at BSs502,506,508has been served over a past time interval.

FIG. 8is an illustration of a block diagram of an example system of providing configuration of scheduling policy for facilitating distributed scheduling in accordance with various aspects set forth herein. It is to be appreciated that system800is represented as including functional blocks, which can be functional blocks that represent functions implemented by a processor, hardware, software, firmware, or combination thereof. System800can include a logical or physical grouping802of electrical components for configuration of scheduling policy for facilitating distributed scheduling.

The electrical components can act in conjunction. For instance, the logical or physical grouping802can include an electrical component804for transmitting configuration information to provision a priority function. The traffic can be associated with one of one or more logical channels, and the priority function can be configured for one or more logical channels of traffic. The one or more parameters can be indicative of the traffic, and the priority function for configuring the scheduling policy for traffic can be based on at least the one or more parameters indicative of the traffic.

In embodiments wherein the priority function is a parametric priority function having one or more constants, the logical or physical grouping802can also include an electrical component806for transmitting one or more values corresponding to the one or more constants. The one or more constants can be employed in the parametric priority function to generate a priority metric according to which the traffic can be scheduled.

In embodiments wherein the priority function is a parametric priority function, one or more different parameterizations of the parametric priority function can enable a BS to provide strict priority scheduling of the different classes of the traffic transmitted from the BS. In some embodiments, strict priority scheduling of the different classes of the traffic can include scheduling interfering traffic can be scheduled for transmission if an interference caused by the interfering traffic is below a selected threshold. In some embodiments, the selected threshold is an SINR value.

In some embodiments, the priority function can be a tabular priority function and a priority metric can be generated based on mapping at least one or more values of the one or more parameters indicative of the traffic to the priority metric.

With reference toFIG. 5, the parameters indicative of the traffic can include one or more of: head of line delay at one or more queues of BSs502,506,508, an average rate of a queue at one or more queues of BSs502,506,508, an average channel state on which the traffic can be scheduled to be transmitted, a packet error rate associated with a packet including the traffic, a queue length at one or more queues of BSs502,506,508, an average rate of a queue at one or more queues of BSs502,506,508, a size of a packet including the traffic, a queue length at one or more queues of BSs502,506,508, a channel gain over a serving communication link, a channel gain over a cross communication link or an average rate at which a queue at one or more queues of BSs502,506,508has been served over a past time interval.

The logical or physical grouping802can also include an electrical component808for storing. The electrical component808for storing can be configured to store configuration information to provision a priority function and/or one or more constants of a parametric priority function.

FIG. 9is an illustration of a block diagram of an example system of providing configuration of scheduling policy for facilitating distributed scheduling in accordance with various aspects set forth herein. It is to be appreciated that system900is represented as including functional blocks, which can be functional blocks that represent functions implemented by a processor, hardware, software, firmware, or combination thereof. System900can include a logical or physical grouping902of electrical components for configuration of scheduling policy for facilitating distributed scheduling.

The electrical components can act in conjunction. For instance, the logical or physical grouping902can include an electrical component904for receiving configuration information to provision a priority function for configuring the scheduling policy for traffic. The configuration information to provision the priority function can be received at a plurality of BSs in a respective plurality of different cells. The priority function can be for configuring the scheduling policy for traffic at each of the plurality of BSs. With reference toFIG. 5, in some embodiments, the BSs can be BSs502,506,508.

The logical or physical grouping902can also include an electrical component906for determining one or more parameters indicative of the traffic. The logical or physical grouping902can also include an electrical component908for configuring the priority function for configuring the scheduling policy for traffic based on at least the one or more parameters indicative of the traffic.

The logical or physical grouping902can also include an electrical component910for generating a priority metric for the traffic based on one or more values of the parameters indicative of the traffic and the priority function.

The logical or physical grouping902can also include an electrical component912for determining transmission power levels of different transmissions in a time slot. The transmission power levels that are determined can be based on the priority function and/or channel gains on serving links and on interfering links for the plurality of BSs.

In some embodiments, the traffic can be associated with one of one or more logical channels. The priority function can be configured for the one or more logical channels. In some embodiments, the priority function can be a parametric priority function and one or more different parameterizations of the parametric priority function can enable the BSs502,506,508to provide strict priority scheduling of the different classes of traffic. In some embodiments, strict scheduling can include scheduling interfering traffic for transmission if an interference caused by the interfering traffic is below a selected threshold. In some embodiments, the selected threshold is an SINR.

In some embodiments, the SINR can be a first value if a priority of the traffic can be a first priority and a second value if a priority of the traffic can be a second priority, wherein the first value can be greater than the second value if the first priority is higher than the second priority.

In some embodiments, the one or more parameters indicative of the traffic can be quality of service parameters. In some embodiments, the quality of service parameters can be quality of service class identifier parameters and the priority function can be a parametric priority function having one or more constants configured as a function of the quality of service class identifier parameters.

In some embodiments, the parameters indicative of the traffic can be an average rate of serving a queue at BSs502,506,508, a head of line delay at BSs502,506,508or a queue length at BSs502,506,508.

In some embodiments, the priority function can be a tabular priority function. Generating the priority metric can include mapping the values of the parameters to the priority metric.

In some embodiments, the parameters indicative of the traffic can include one or more of: head of line delay at BSs502,506,508, an average rate of a queue at BSs502,506,508, an average channel state on which the traffic can be scheduled to be transmitted, a packet error rate associated with a packet including the traffic, a queue length at BSs502,506,508, an average rate of a queue at BSs502,506,508, a size of a packet including the traffic, a queue length at BSs502,506,508, a channel gain over a serving communication link, a channel gain over a cross communication link or an average rate at which a queue at BSs502,506,508has been served over a past time interval.

The logical or physical grouping902can also include an electrical component914for storing. The electrical component914for storing information indicative of a priority metric, information for configuring a priority function, configuration information, information for determining parameters indicative of traffic, transmission power levels and/or parameters indicative of traffic.

Further to the descriptions of the apparatus provided with reference toFIG. 5, embodiments of apparatus can be as described below. A first apparatus according to the aspects described herein can include: means for receiving configuration information to provision a priority function for configuring the scheduling policy for traffic. The configuration information can provision a priority function for configuring the scheduling policy for traffic can be received at a plurality of BSs in a respective plurality of different cells. The priority function can be for configuring the scheduling policy for traffic at each of the plurality of BSs.

The apparatus can also include means for determining one or more parameters indicative of the traffic. The apparatus can also include means for configuring the priority function for configuring the scheduling policy for traffic based on at least the one or more parameters indicative of the traffic.

The traffic can be associated with one of one or more logical channels, and the priority function can be configured for the one or more logical channels. The priority function can be a parametric priority function and one or more different parameterizations of the parametric priority function that enable the BS to provide strict priority scheduling of the traffic. The interfering traffic can be scheduled for transmission if an interference caused by the interfering traffic is below a selected threshold. The threshold can be an SINR in some embodiments.

The SINR can be a first value if a priority of the traffic can be a first priority and a second value if a priority of the traffic can be a second priority, wherein the first value can be greater than the second value if the first priority is higher than the second priority.

The parameters indicative of the traffic can be quality of service parameters. The quality of service parameters can be quality of service class identifier parameters. The priority function can be a parametric priority function having one or more constants configured as a function of the quality of service class identifier parameters.

In some embodiments, parameters indicative of the traffic can be an average rate of serving a queue at BSs502,506,508, a head of line delay at BSs502,506,508or a queue length at BSs502,506,508.

The apparatus can also include means for generating a priority metric for the traffic based on one or more values of the one or more parameters and the priority function for configuring the scheduling policy for traffic.

In some embodiments, the priority function can be a tabular priority function. Generating a priority metric can include mapping one or more values of the one or more parameters to the priority metric.

In some embodiments, the parameters can include one or more of: a head of line delay at BSs502,506,508, an average rate of a queue at BSs502,506,508, an average channel state on which the traffic can be scheduled to be transmitted, a packet error rate associated with a packet including the traffic, a queue length at BSs502,506,508, an average rate of a queue at BSs502,506,508, a size of a packet including the traffic, a queue length at BSs502,506,508, a channel gain over a serving communication link, a channel gain over a cross communication link or an average rate at which a queue at BSs502,506,508has been served over a past time interval.

In one embodiment, the apparatus includes: a base station provisioning interface configured to receive configuration information to provision a priority function for configuring the scheduling policy for traffic. The configuration information for configuring the scheduling policy for traffic can be received at a plurality of BSs. The configuration information can be for provisioning the priority function. The base station provisioning interface can be further configured to: determine one or more parameters indicative of the traffic; and configure the priority function for configuring the scheduling policy for traffic based on at least the one or more parameters indicative of the traffic.

The traffic can be associated with one of one or more logical channels, and the priority function can be configured for the one or more logical channels. The priority function can be a parametric priority function and one or more different parameterizations of the parametric priority function can enable the BSs502,506,508to provide strict priority scheduling of the different classes of traffic. Strict priority scheduling can include scheduling interfering traffic for transmission if an interference caused by the interfering traffic is below a selected threshold. The selected threshold can be an SINR in some embodiments.

The SINR can be a first value if a priority of the traffic can be a first priority and a second value if a priority of the traffic can be a second priority, wherein the first value can be greater than the second value if the first priority is higher than the second priority.

The parameters indicative of the traffic can be quality of service parameters. The quality of service parameters can be quality of service class identifier parameters and the priority function can be a parametric priority function having one or more constants configured as a function of the quality of service class identifier parameters.

The parameters indicative of the traffic can be an average rate of serving a queue at BSs502,506,508, a head of line delay at BSs502,506,508or a queue length at BSs502,506,508.

The base station provisioning interface can be further configured to generate a priority metric for the traffic based on at least one or more values of the one or more parameters indicative of the traffic and the priority function.

In some embodiments, the priority function can be a tabular priority function. Generating the priority metric can include mapping one or more values of the one or more parameters indicative of the traffic to the priority metric.

In some embodiments, the parameters indicative of the traffic can include: head of line delay at BSs502,506,508, an average rate of a queue at BSs502,506,508, an average channel state on which the traffic can be scheduled to be transmitted, a packet error rate associated with a packet including the traffic, a queue length at BSs502,506,508, an average rate of a queue at BSs502,506,508, a size of a packet including the traffic, a queue length at BSs502,506,508, a channel gain over a serving communication link, a channel gain over a cross communication link or an average rate at which a queue at BSs502,506,508has been served over a past time interval.

In another embodiment, another apparatus can include a means for transmitting configuration information to provision a priority function for configuring the scheduling policy for traffic. The configuration information can be transmitted to a plurality of BSs in a respective plurality of different cells for provisioning the priority function. The priority function can be provisioned at the plurality of BSs. In one embodiment, the priority function can be provisioning at the BSs502,506,508.

In some embodiments, the traffic can be associated with one of one or more logical channels, and the priority function can be configured for the one or more logical channels.

The parameters are indicative of the traffic, and the priority function for configuring the scheduling policy for traffic can be based on one or more parameters indicative of the traffic. The priority function can be a parametric priority function having one or more constants. In these embodiments, the apparatus can also include means for transmitting one or more values corresponding to the one or more constants. The one or more constants can be employed in the parametric priority function to generate a priority metric according to which the traffic can be scheduled.

The priority function can be a parametric priority function and one or more different parameterizations of the parametric priority function can enable the BS to provide strict priority scheduling of the traffic. The strict priority scheduling can include scheduling interfering traffic for transmission if an interference caused by the interfering traffic is below a selected threshold. The selected threshold can be an SINR in some embodiments.

In some embodiments, the priority function can be a tabular priority function and a priority metric can be generated based on mapping one or more values of the one or more parameters indicative of the traffic to the priority metric.

The parameters can include head of line delay at BSs502,506,508, an average rate of a queue at BSs502,506,508, an average channel state on which the traffic can be scheduled to be transmitted, a packet error rate associated with a packet including the traffic, a queue length at BSs502,506,508, an average rate of a queue at BSs502,506,508, a size of a packet including the traffic, a queue length at BSs502,506,508, a channel gain over a serving communication link, a channel gain over a cross communication link or an average rate at which a queue at BSs502,506,508has been served over a past time interval.

In one embodiment, the apparatus includes: a controller provisioning interface configured to transmit configuration information to provision a priority function for configuring the scheduling policy for traffic. The configuration information can be employed to provision a priority function at BSs502,506,508in the respective plurality of different cells.

The traffic can be associated with one of one or more logical channels, and the priority function can be configured for the one or more logical channels. The parameters are indicative of the traffic, and the priority function can be based on the parameters indicative of the traffic.

The priority function can be a parametric priority function having one or more constants. The controller provisioning interface can be further configured to transmit one or more values corresponding to the one or more constants. The one or more constants can be employed in the parametric priority function to generate a priority metric according to which the traffic can be scheduled.

In some embodiments, the priority function can be a parametric priority function and one or more different parameterizations of the parametric priority function can enable BSs502,506,508to provide strict priority scheduling of the traffic. Strict scheduling of the traffic can include scheduling interfering traffic can be scheduled for transmission if an interference caused by the interfering traffic is below a selected threshold. The selected threshold can be an SINR in some embodiments.

The priority function can be a tabular priority function and a priority metric can be generated based on mapping at least one or more values of the one or more parameters to the priority metric.

The parameters indicative of the traffic can include one or more of a head of line delay at BSs502,506,508, an average rate of a queue at BSs502,506,508, an average channel state on which the traffic can be scheduled to be transmitted, a packet error rate associated with a packet including the traffic, a queue length at BSs502,506,508, an average rate of a queue at BSs502,506,508, a size of a packet including the traffic, a queue length at BSs502,506,508, a channel gain over a serving communication link, a channel gain over a cross communication link or an average rate at which a queue at BSs502,506,508has been served over a past time interval.

In some embodiments, a computer program product is provided. The computer program product can include a computer-readable medium. The computer-readable medium can include a first set of codes for causing a computer to receive configuration information to provision a priority function for configuring the scheduling policy for traffic. The configuration information to provision the priority function can be received at a plurality of BSs in a respective plurality of different cells. With reference toFIG. 5, by way of example, but not limitation, the configuration information can be received at one or more of BSs502,506,508. The configuration information can be for configuring the scheduling policy for traffic at each of the BSs502,506,508.

The computer program product can also include a second set of codes for causing the computer to determine one or more parameters indicative of the traffic. The computer program product can also include a third set of codes for causing the computer to configure the priority function for configuring the scheduling policy for traffic based on at least the one or more parameters indicative of the traffic.

In some embodiments, the one or more parameters indicative of the traffic can be QoS parameters. In some embodiments, the QoS parameters are quality of service class identifier parameters. In these embodiments, the priority function can be a parametric priority function having one or more constants configured as a function of the quality of service class identifier parameters.

In some embodiments, at least one of the one or more parameters indicative of the traffic can be an average rate of serving a queue at one of the BSs502,506,508, a head of line delay at one of the BSs502,506,508or a queue length at one of the BSs502,506,508.

In some embodiments, the traffic can be associated with one of one or more logical channels, and the priority function can be configured for the one or more logical channels.

In some embodiments, a computer program product is provided. The computer program product can include a computer-readable medium. The computer-readable medium can include a first set of codes for causing a computer to transmit configuration information to provision a priority function. The priority function can be for configuring the scheduling policy for traffic. The configuration information can be transmitted to a plurality of BSs in a respective plurality of different cells for provisioning the priority function at each of the plurality of BSs.

In some embodiments, the traffic can be associated with one of one or more logical channels, and the priority function can be configured for the one or more logical channels.

In some embodiments, one or more parameters can be indicative of the traffic, and the priority function for configuring the scheduling policy for traffic can be based on at least the one or more parameters indicative of the traffic.

The priority function can be a parametric priority function having one or more constants.

The computer program product can also include a second set of codes for causing the computer to transmit one or more values corresponding to the one or more constants. The one or more constants can be employed in the parametric priority function to generate a priority metric according to which the traffic can be scheduled.

The priority function can be a parametric priority function and one or more different parameterizations of the parametric priority function can provides strict priority scheduling of the traffic wherein interfering traffic can be scheduled for transmission if an interference caused by the interfering traffic is below a selected threshold. The selected threshold can be an SINR in some embodiments.

In some embodiments, the priority function can be a tabular priority function and a priority metric can be generated based on at least mapping at least one or more values of the one or more parameters indicative of the traffic to the priority metric.

In some embodiments, the one or more parameters indicative of the traffic can include head of line delay at a one of the plurality of BSs, an average rate of a queue at a one of the plurality of BSs, an average channel state on which the traffic can be scheduled to be transmitted, a packet error rate associated with a packet including the traffic, a queue length at of the plurality of BSs, an average rate of a queue at a one of the plurality of BSs, a size of a packet including the traffic, a queue length at a one of the plurality of BSs, a channel gain over a serving communication link, a channel gain over a cross communication link or an average rate at which a queue at a one of the plurality of BSs has been served over a past time interval.

A wireless multiple-access communication system can simultaneously support communication for multiple wireless access terminals. As mentioned above, each terminal can communicate with one or more BSs via transmissions on the forward and reverse links. The forward link (or downlink) refers to the communication link from the BSs to the terminals, and the reverse link (or uplink) refers to the communication link from the terminals to the BSs. This communication link can be established via a single-in-single-out system, a multiple-in-multiple-out (MIMO) system, or some other type of system.

A MIMO system can support time division duplex (TDD) and frequency division duplex (FDD). In a TDD system, the forward and reverse link transmissions are on the same frequency region so that the reciprocity principle allows the estimation of the forward link channel from the reverse link channel. This enables the access point to extract transmit beam-forming gain on the forward link when multiple antennas are available at the access point.

FIG. 10shows an example wireless communication system in which the embodiments described herein can be employed in accordance with various aspects set forth herein. The teachings herein may be incorporated into a node (e.g., a device) employing various components for communicating with at least one other node.FIG. 10depicts several sample components that may be employed to facilitate communication between nodes. Specifically,FIG. 10illustrates a wireless device1010(e.g., an access point) and a wireless device1050(e.g., an access terminal) of a wireless communication system1000(e.g., MIMO system). At the device1010, traffic data for a number of data streams is provided from a data source1012to a transmit (TX) data processor1014.

In some aspects, each data stream is transmitted over a respective transmit antenna. The TX data processor1014formats, codes, and interleaves the traffic data for each data stream based on a particular coding scheme selected for that data stream to provide coded data.

The modulation symbols for all data streams are then provided to a TX MIMO processor1020, which may further process the modulation symbols (e.g., for OFDM). The TX MIMO processor1020then provides NTmodulation symbol streams to NTtransceivers (XCVR)1022A through1022T. In some aspects, the TX MIMO processor1020applies beam-forming weights to the symbols of the data streams and to the antenna from which the symbol is being transmitted.

Each transceiver1022receives and processes a respective symbol stream to provide one or more analog signals, and further conditions (e.g., amplifies, filters, and upconverts) the analog signals to provide a modulated signal suitable for transmission over the MIMO channel. NTmodulated signals from transceivers1022A through1022T are then transmitted from NTantennas1024A through1024T, respectively.

At the device1050, the transmitted modulated signals are received by NRantennas1052A through1052R and the received signal from each antenna1052is provided to a respective transceiver (XCVR)1054A through1054R. Each transceiver1054conditions (e.g., filters, amplifies, and downconverts) a respective received signal, digitizes the conditioned signal to provide samples, and further processes the samples to provide a corresponding “received” symbol stream.

A receive (RX) data processor1060then receives and processes the NRreceived symbol streams from NRtransceivers1054based on a particular receiver processing technique to provide NT“detected” symbol streams. The RX data processor1060then demodulates, deinterleaves, and decodes each detected symbol stream to recover the traffic data for the data stream. The processing by the RX data processor1060is complementary to that performed by the TX MIMO processor1020and the TX data processor1014at the device1010.

A processor1070periodically determines which pre-coding matrix to use (discussed below). The processor1070formulates a reverse link message comprising a matrix index portion and a rank value portion. A data memory1072may store program code, data, and other information used by the processor1070or other components of the device1050.

The reverse link message may comprise various types of information regarding the communication link and/or the received data stream. The reverse link message is then processed by a TX data processor1038, which also receives traffic data for a number of data streams from a data source1036, modulated by a modulator1080, conditioned by the transceivers1054A through1054R, and transmitted back to the device1010.

At the device1010, the modulated signals from the device1050are received by the antennas1024, conditioned by the transceivers1022, demodulated by a demodulator (DEMOD)1040, and processed by a RX data processor1042to extract the reverse link message transmitted by the device1050. The processor1030then determines which pre-coding matrix to use for determining the beam-forming weights then processes the extracted message.

FIG. 10also illustrates that the communication components may include one or more components that perform interference control operations as taught herein. For example, an interference (INTER.) control component1090may cooperate with the processor1030and/or other components of the device1010to send/receive signals to/from another device (e.g., device1050) as taught herein. Similarly, an interference control component1092may cooperate with the processor1070and/or other components of the device1050to send/receive signals to/from another device (e.g., device1010). It should be appreciated that for each device1010and1050the functionality of two or more of the described components may be provided by a single component. For example, a single processing component may provide the functionality of the interference control component1090and the processor1030and a single processing component may provide the functionality of the interference control component1092and the processor1070.

In an aspect, logical channels can be classified into Control Channels and Traffic Channels. Logical Control Channels can include a Broadcast Control Channel (BCCH), which is a DL channel for broadcasting system control information. Further, Logical Control Channels can include a Paging Control Channel (PCCH), which is a DL channel that transfers paging information. Moreover, the Logical Control Channels can include a Multicast Control Channel (MCCH), which is a Point-to-multipoint DL channel used for transmitting Multimedia Broadcast and Multicast Service (MBMS) scheduling and control information for one or several Multicast Traffic Channels (MTCHs). Generally, after establishing a Radio Resource Control (RRC) connection, this channel is only used by UEs that receive MBMS (e.g., old MCCH+MSCH). Additionally, the Logical Control Channels can include a Dedicated Control Channel (DCCH), which is a Point-to-point bi-directional channel that transmits dedicated control information and can be used by UEs having a RRC connection. In an aspect, the Logical Traffic Channels can comprise a Dedicated Traffic Channel (DTCH), which is a Point-to-point bi-directional channel dedicated to one UE for the transfer of user information. Also, the Logical Traffic Channels can include an MTCH for Point-to-multipoint DL channel for transmitting traffic data.

In an aspect, Transport Channels are classified into DL and UL. DL Transport Channels can include a Broadcast Channel (BCH), a Downlink Shared Data Channel (DL-SDCH) and a Paging Channel (PCH). The PCH can support UE power saving (e.g., Discontinuous Reception (DRX) cycle can be indicated by the network to the UE) by being broadcasted over an entire cell and being mapped to Physical layer (PHY) resources that can be used for other control/traffic channels. The UL Transport Channels can comprise a Random Access Channel (RACH), a Request Channel (REQCH), an Uplink Shared Data Channel (UL-SDCH) and a plurality of PHY channels.

The PHY channels can include a set of DL channels and UL channels. For example, the DL PHY channels can include: Common Pilot Channel (CPICH); Synchronization Channel (SCH); Common Control Channel (CCCH); Shared DL Control Channel (SDCCH); Multicast Control Channel (MCCH); Shared UL Assignment Channel (SUACH); Acknowledgement Channel (ACKCH); DL Physical Shared Data Channel (DL-PSDCH); UL Power Control Channel (UPCCH); Paging Indicator Channel (PICH); and/or Load Indicator Channel (LICH). By way of further illustration, the UL PHY Channels can include: Physical Random Access Channel (PRACH); Channel Quality Indicator Channel (CQICH); Acknowledgement Channel (ACKCH); Antenna Subset Indicator Channel (ASICH); Shared Request Channel (SREQCH); UL Physical Shared Data Channel (UL-PSDCH); and/or Broadband Pilot Channel (BPICH).

It is to be understood that the embodiments described herein can be implemented in hardware, software, firmware, middleware, microcode, or any combination thereof. For a hardware implementation, the processing units can be implemented within one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), processors, controllers, micro-controllers, microprocessors and/or other electronic units designed to perform the functions described herein, or a combination thereof.