WO2016095132A1

WO2016095132A1 - Techniques for configuring feedback transmission in wireless communications

Info

Publication number: WO2016095132A1
Application number: PCT/CN2014/094116
Authority: WO
Inventors: Tsun Sang CHEONG; Chun Chung Patrick Chan; Alvin Siu-Chung Ng; Tak Wai Wu
Original assignee: Qualcomm Incorporated
Priority date: 2014-12-17
Filing date: 2014-12-17
Publication date: 2016-06-23

Abstract

The disclosure relates to methods, apparatus, and computer programs for configuring resources for reporting feedback for a plurality of received communications. For example, a device communicating feedback for the plurality of communications can include multiple antenna resources, and the feedback for the plurality of received communications can be transmitted over the plurality of multiple antenna resources such that at least one antenna resource transmits a portion of the feedback and at least another antenna resource transmits another portion of the feedback.

Description

TECHNIQUES FOR CONFIGURING FEEDBACK TRANSMISSION IN WIRELESS COMMUNICATIONS

FIELD OF THE DISCLOSURE

Described herein are aspects generally related to communication systems, and more particularly, to techniques for configuring resources for feedback transmission in a wireless communication system.

BACKGROUND

Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power) . Examples of such multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems.

These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate on a municipal, national, regional, and even global level. An example of an emerging telecommunication standard is Long Term Evolution (LTE) . LTE is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by Third Generation Partnership Project (3GPP) . It is designed to better support mobile broadband Internet access by improving spectral efficiency, lower costs, improve services, make use of new spectrum, and better integrate with other open standards using OFDMA on the downlink (DL) , SC-FDMA on the uplink (UL) , and multiple-input multiple-output (MIMO) antenna technology.

In some configurations of wireless communication systems employing LTE, a user equipment (UE) can communicate with an evolved Node B (eNB) over various resources and can receive multiple communications from the eNB. The UE may provide feedback for the multiple communications over a feedback channel using a Qualcomm Ref. No. 151019WO1

retransmission scheme (e.g., hybrid automatic repeat/request (HARQ) ) , but there may not be enough feedback channel resources to provide separate feedback for each communication. Accordingly, a UE may bundle or multiplex feedback for communicating to the eNB using a reduced set of resources. Feedback bundling, however, may create unnecessary retransmission scenarios where non-acknowledged transmissions are otherwise received. Feedback multiplexing may allow for transmitting all feedback, but may use more uplink control resources than necessary for communicating the feedback.

SUMMARY

Described herein are various aspects related to methods, apparatus, and computer programs for configuring resources for reporting feedback for a plurality of received communications. For example, a device communicating feedback for the plurality of communications can include multiple antenna resources, and the feedback for the plurality of received communications can be transmitted over the plurality of multiple antenna resources such that at least one antenna resource transmits a portion of the feedback and at least another antenna resource transmits another portion of the feedback.

Various aspects and features of the disclosure are described in further detail below with reference to various examples thereof as shown in the accompanying drawings. While the present disclosure is described below with reference to various examples, it should be understood that the present disclosure is not limited thereto. Those of ordinary skill in the art having access to the teachings herein will recognize additional implementations, modifications, and examples, as well as other fields of use, which are within the scope of the present disclosure as described herein, and with respect to which the present disclosure may be of significant utility.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a block diagram conceptually illustrating an example of a telecommunications system, in accordance with aspects described herein.

FIG. 2 is a diagram illustrating an example of an access network.

FIG. 3 is a diagram illustrating an example of a downlink (DL) frame structure in long term evolution (LTE) . Qualcomm Ref. No. 151019WO1

FIG. 4 is a diagram illustrating an example of an uplink (UL) frame structure in LTE.

FIG. 5 is a diagram illustrating an example of a radio protocol architecture for the user and control planes.

FIG. 6 is a diagram illustrating an example of an evolved Node B and user equipment in an access network.

FIG. 7 is a diagram illustrating an example system in accordance with aspects described herein.

FIGs. 8-9 are flow charts of example methods of wireless communication.

FIG. 10 illustrates an example of a resource configuration in time division duplexing (TDD) configuration in accordance with aspects described herein.

FIG. 11 is a diagram illustrating an example of a hardware implementation for an apparatus employing a processing system.

DETAILED DESCRIPTION

The detailed description set forth below in connection with the appended drawings is intended as a description of various configurations and is not intended to represent the only configurations in which the concepts described herein may be practiced. The detailed description includes specific details for the purpose of providing a thorough understanding of various concepts. However, it will be apparent to those skilled in the art that these concepts may be practiced without these specific details. In some instances, well known structures and components are shown in block diagram form in order to avoid obscuring such concepts.

Several aspects of telecommunication systems will now be presented with reference to various apparatus and methods. These apparatus and methods will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as “elements” ) . These elements may be implemented using electronic hardware, computer software, or any combination thereof. Whether such elements are implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system.

By way of example, an element, or any portion of an element, or any combination of elements may be implemented with a “processing system” that includes one or more processors. Examples of processors include microprocessors, Qualcomm Ref. No. 151019WO1

microcontrollers, digital signal processors (DSPs) , field programmable gate arrays (FPGAs) , programmable logic devices (PLDs) , state machines, gated logic, discrete hardware circuits, and other suitable hardware configured to perform the various functionality described throughout this disclosure. One or more processors in the processing system may execute software. Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

Accordingly, in one or more aspects, the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions may be stored on or encoded as one or more instructions or code on a computer-readable medium. Computer-readable media includes computer storage media. Storage media may be any available media that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. Combinations of the above should also be included within the scope of computer-readable media.

Described herein are various aspects related to configuring resources for communicating feedback for a plurality of received communications. For example, a device communicating the feedback can include a plurality of antenna resources (e.g., a plurality of virtual or physical antenna ports) over which portions of the feedback can be separately transmitted. The separate transmission may occur substantially concurrently (e.g., over subframes occurring in similar time periods) at each of the plurality of antenna resources. In an example, the portions of feedback can additionally be multiplexed where each portion includes a feedback for a plurality of communications. In one example, the device may indicate a capability of transmitting the feedback using the multiple antenna resources, and/or may receive a configuration indicating to transmit the feedback using the multiple antenna resources. Qualcomm Ref. No. 151019WO1

Referring first to FIG. 1, a diagram illustrates an example of a wireless communications system 100, in accordance with aspects described herein. The wireless communications system 100 includes a plurality of access points (e.g., base stations, eNBs, or WLAN access points) 105, a number of user equipment (UEs) 115, and a core network 130. Access points 105 may include a communicating component 602 configured to transmit resource grants (e.g., for control and/or data uplink communications) to UEs 115 for communicating with the access points 105. The communicating component 602 can also communicate with the UEs 115 over multiple downlink resources, and can receive feedback from one or more UEs 115 for multiple communications in multiple transmissions from the one or more UEs 115, which may occur concurrently, as described herein. UEs 115 can include a communicating component 661 for receiving a plurality of communications from an access point 105, and transmitting feedback for the plurality of communications to the access point 105 over multiple antenna resources.

Some of the access points 105 may communicate with the UEs 115 under the control of a base station controller (not shown) , which may be part of the core network 130 or the certain access points 105 (e.g., base stations or eNBs) in various examples. Access points 105 may communicate control information and/or user data with the core network 130 through backhaul links 132. In examples, the access points 105 may communicate, either directly or indirectly, with each other over backhaul links 134, which may be wired or wireless communication links. The wireless communications system 100 may support operation on multiple carriers (waveform signals of different frequencies) . Multi-carrier transmitters can transmit modulated signals simultaneously on the multiple carriers. For example, each communication link 125 may be a multi-carrier signal modulated according to the various radio technologies described above. Each modulated signal may be sent on a different carrier and may carry control information (e.g., reference signals, control channels, etc. ) , overhead information, data, etc.

In this regard, a UE 115 can be configured to communicate with one or more access points 105 over multiple carriers using carrier aggregation (CA) (e.g., with one access point 105) and/or multiple connectivity (e.g., with multiple access points 105) . In either case, UE 115 can be configured with at least one primary cell (PCell) configured to support uplink and downlink communications between UE 115 and an access point 105. It is to be appreciated that there can be a PCell for each Qualcomm Ref. No. 151019WO1

communication link 125 between a UE 115 and a given access point 105. In addition, each of the communication links 125 can have one or more secondary cells (SCell) that can support uplink and/or downlink communications as well. In some examples, the PCell can be used to communicate at least a control channel, and the SCell can be used to communicate a data channel.

The access points 105 may wirelessly communicate with the UEs 115 via one or more access point antennas. Each of the access points 105 sites may provide communication coverage for a respective coverage area 110. In some examples, access points 105 may be referred to as a base transceiver station, a radio base station, a radio transceiver, a basic service set (BSS) , an extended service set (ESS) , a NodeB, eNodeB, Home NodeB, a Home eNodeB, or some other suitable terminology. The coverage area 110 for a base station may be divided into sectors making up only a portion of the coverage area (not shown) . The wireless communications system 100 may include access points 105 of different types (e.g., macro, micro, and/or pico base stations) . The access points 105 may also utilize different radio technologies, such as cellular and/or WLAN radio access technologies (RAT) . The access points 105 may be associated with the same or different access networks or operator deployments. The coverage areas of different access points 105, including the coverage areas of the same or different types of access points 105, utilizing the same or different radio technologies, and/or belonging to the same or different access networks, may overlap.

In LTE/LTE-Anetwork communication systems, the terms evolved Node B (eNodeB or eNB) may be generally used to describe the access points 105. The wireless communications system 100 may be a Heterogeneous LTE/LTE-Anetwork in which different types of access points provide coverage for various geographical regions. For example, each access point 105 may provide communication coverage for a macro cell, a pico cell, a femto cell, and/or other types of cell. Small cells such as pico cells, femto cells, and/or other types of cells may include low power nodes or LPNs. A macro cell generally covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs 115 with service subscriptions with the network provider. A small cell would generally cover a relatively smaller geographic area and may allow unrestricted access by UEs 115 with service subscriptions with the network provider, for example, and in addition to unrestricted access, may also provide restricted access by UEs 115 having an association with the small cell (e.g., UEs in a closed subscriber group (CSG) , UEs for users in the home, and the like) . An eNB for a macro cell may be referred to as a macro eNB. An eNB for a small cell may be referred to as a small cell eNB. An eNB may support one or multiple (e.g., two, three, four, and the like) cells.

The core network 130 may communicate with the eNBs or other access points 105 via a backhaul links 132 (e.g., S1 interface, etc. ) .The access points 105 may also communicate with one another, e.g., directly or indirectly via backhaul links 134 (e.g., X2 interface, etc. ) and/or via backhaul links 132 (e.g., through core network 130) . The wireless communications system 100 may support synchronous or asynchronous operation. For synchronous operation, the access points 105 may have similar frame timing, and transmissions from different access points 105 may be approximately aligned in time. For asynchronous operation, the access points 105 may have different frame timing, and transmissions from different access points 105 may not be aligned in time. Furthermore, transmissions in the first hierarchical layer and second hierarchical layer may or may not be synchronized among access points 105. The techniques described herein may be used for either synchronous or asynchronous operations.

The UEs 115 are dispersed throughout the wireless communications system 100, and each UE 115 may be stationary or mobile. A UE 115 may also be referred to by those skilled in the art as a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communications device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology. A UE 115 may be a cellular phone, a personal digital assistant (PDA) , a wireless modem, a wireless communication device, a handheld device, a tablet computer, a laptop computer, a cordless phone, a wearable item such as a watch or glasses, a wireless local loop (WLL) station, or the like. A UE 115 may be able to communicate with macro eNodeBs, small cell eNodeBs, relays, and the like. A UE 115 may also be able to communicate over different access networks, such as cellular or other WWAN access networks, or WLAN access networks.

The communication links 125 shown in wireless communications system 100 may include uplink (UL) transmissions from a UE 115 to an access point 105, and/or downlink (DL) transmissions, from an access point 105 to a UE 115. The downlink transmissions may also be called forward link transmissions while the uplink transmissions may also be called reverse link transmissions. The communication links 125 may carry transmissions of each hierarchical layer which, in some examples, may be multiplexed in the communication links 125. The UEs 115 may be configured to collaboratively communicate with multiple access points 105 through, for example, Multiple Input Multiple Output (MIMO) , carrier aggregation (CA) , Coordinated Multi-Point (CoMP) , multiple connectivity (e.g., CA with each of one or more access points 105) or other schemes. MIMO techniques use multiple antennas on the access points 105 and/or multiple antennas on the UEs 115 to transmit multiple data streams. Carrier aggregation may utilize two or more component carriers on a same or different serving cell for data transmission. CoMP may include techniques for coordination of transmission and reception by a number of access points 105 to improve overall transmission quality for UEs 115 as well as increasing network and spectrum utilization.

As mentioned, in some examples access points 105 and UEs 115 may utilize carrier aggregation to transmit on multiple carriers. In some examples, access points 105 and UEs 115 may concurrently transmit in a first hierarchical layer, within a frame, one or more subframes each having a first subframe type using two or more separate carriers. Each carrier may have a bandwidth of, for example, 20 MHz, although other bandwidths may be utilized. For example, if four separate 20 MHz carriers are used in a carrier aggregation scheme in the first hierarchical layer, a single 80 MHz carrier may be used in the second hierarchical layer. The 80 MHz carrier may occupy a portion of the radio frequency spectrum that at least partially overlaps the radio frequency spectrum used by one or more of the four 20 MHz carriers. In some examples, scalable bandwidth for the second hierarchical layer type may be combined techniques to provide shorter RTTs such as described above, to provide further enhanced data rates.

Each of the different operating modes that may be employed by wireless communication system 100 may operate according to frequency division duplexing (FDD) or time division duplexing (TDD) . In some examples, different hierarchical layers may operate according to different TDD or FDD modes. For example, a first hierarchical layer may operate according to FDD while a second hierarchical layer may operate according to TDD. In some examples, OFDMA communications signals may be used in the communication links 125 for LTE downlink transmissions for each hierarchical layer, while single carrier frequency division multiple access (SC-FDMA) communications signals may be used in the communication links 125 for LTE uplink transmissions in each hierarchical layer. Additional details regarding implementation of hierarchical layers in a system such as the wireless communications system 100, as well as other features and functions related to communications in such systems, are provided below with reference to the following figures.

FIG. 2 is a diagram illustrating an example of an access network 200 in an LTE network architecture. In this example, the access network 200 is divided into a number of cellular regions (cells) 202. One or more lower power class eNBs 208 may have cellular regions 210 that overlap with one or more of the cells 202. The lower power class eNB 208 may be a small cell (e.g., home eNB (HeNB) ) , femto cell pico cell, micro cell, or remote radio head (RRH) . The macro eNBs 204 are each assigned to a respective cell 202 and are configured to provide an access point to the core network 130 for all the UEs 206 in the cells 202. In an aspect, eNBs 204 and/or small cells 208 may include a communicating component 602 for communicating with the UEs 206 over multiple downlink resources, and receiving feedback from one or more UEs 206 for multiple communications in multiple transmissions from the one or more UEs 206, which may occur concurrently, as described herein. UEs 206 may include a communicating component 661 for receiving a plurality of communications from an eNB 204 and/or small cell 208, and transmitting feedback for the plurality of communications to the eNB 204 and/or small cell 208 over multiple antenna resources. There is no centralized controller shown in this example of an access network 200, but a centralized controller may be used in alternative configurations. The eNBs 204 are responsible for all radio related functions including radio bearer control, admission control, mobility control, scheduling, security, and connectivity to one or more components of core network 130.

The modulation and multiple access scheme employed by the access network 200 may vary depending on the particular telecommunications standard being deployed. In LTE applications, OFDM may be used on the DL and SC-FDMA may be used on the UL to support both frequency division duplexing (FDD) and time division duplexing (TDD) . As those skilled in the art will readily appreciate from the detailed description to follow, the various concepts presented herein are well suited for LTE applications. However, these concepts may be readily extended to other telecommunication standards employing other modulation and multiple access techniques. By way of example, these concepts may be extended to Evolution-Data Optimized (EV-DO) or Ultra Mobile Broadband (UMB) . EV-DO and UMB are air interface standards promulgated by the 3rd Generation Partnership Project 2 (3GPP2) as part of the CDMA2000 family of standards and employs CDMA to provide broadband Internet access to mobile stations. These concepts may also be extended to Universal Terrestrial Radio Access (UTRA) employing Wideband-CDMA (W-CDMA) and other variants of CDMA, such as TD-SCDMA； Global System for Mobile Communications (GSM) employing TDMA； and Evolved UTRA (E-UTRA) , IEEE 802.11 (Wi-Fi) , IEEE 802.16 (WiMAX) , IEEE 802.20, and Flash-OFDM employing OFDMA. UTRA, E-UTRA, UMTS, LTE and GSM are described in documents from the 3GPP organization. CDMA2000 and UMB are described in documents from the 3GPP2 organization. The actual wireless communication standard and the multiple access technology employed will depend on the specific application and the overall design constraints imposed on the system.

The eNBs 204 may have multiple antennas supporting MIMO technology. The use of MIMO technology enables the eNBs 204 to exploit the spatial domain to support spatial multiplexing, beamforming, and transmit diversity. Spatial multiplexing may be used to transmit different streams of data simultaneously on the same frequency. The data steams may be transmitted to a single UE 206 to increase the data rate or to multiple UEs 206 to increase the overall system capacity. This is achieved by spatially precoding each data stream (i.e., applying a scaling of an amplitude and a phase) and then transmitting each spatially precoded stream through multiple transmit antennas on the DL. The spatially precoded data streams arrive at the UE (s) 206 with different spatial signatures, which enables each of the UE (s) 206 to recover the one or more data streams destined for that UE 206. On the UL, each UE 206 transmits a spatially precoded data stream, which enables the eNB 204 to identify the source of each spatially precoded data stream.

Spatial multiplexing is generally used when channel conditions are good. When channel conditions are less favorable, beamforming may be used to focus the transmission energy in one or more directions. This may be achieved by spatially precoding the data for transmission through multiple antennas. To achieve good coverage at the edges of the cell, a single stream beamforming transmission may be used in combination with transmit diversity.

In the detailed description that follows, various aspects of an access network will be described with reference to a MIMO system supporting OFDM on the DL. OFDM is a spread-spectrum technique that modulates data over a number of subcarriers within an OFDM symbol. The subcarriers are spaced apart at precise frequencies. The spacing provides “orthogonality” that enables a receiver to recover the data from the subcarriers. In the time domain, a guard interval (e.g., cyclic prefix) may be added to each OFDM symbol to combat inter-OFDM-symbol interference. The UL may use SC-FDMA in the form of a DFT-spread OFDM signal to compensate for high peak-to-average power ratio (PAPR) .

FIG. 3 is a diagram 300 illustrating an example of a DL frame structure in LTE. The depicted DL frame structure may be used by communicating component 602 to transmit communications to communicating component 661, including resource grants and/or other control or data signals. A frame (10 ms) may be divided into 10 equally sized sub-frames. Each sub-frame may include two consecutive time slots. A resource grid may be used to represent two time slots, each time slot including a resource element block. The resource grid is divided into multiple resource elements. In LTE, a resource element block may contain 12 consecutive subcarriers in the frequency domain and, for a normal cyclic prefix in each OFDM symbol, 7 consecutive OFDM symbols in the time domain, or 84 resource elements. For an extended cyclic prefix, a resource element block may contain 6 consecutive OFDM symbols in the time domain and has 72 resource elements. Some of the resource elements, as indicated as

R

302, 304, include DL reference signals (DL-RS) . The DL-RS include Cell-specific RS (CRS) (also sometimes called common RS) 302 and UE-specific RS (UE-RS) 304. UE-RS 304 are transmitted only on the resource element blocks upon which the corresponding physical downlink shared channel (PDSCH) is mapped. The number of bits carried by each resource element depends on the modulation scheme. Thus, the more resource element blocks that a UE receives and the higher the modulation scheme, the higher the data rate for the UE.

FIG. 4 is a diagram 400 illustrating an example of an UL frame structure in LTE. The depicted DL frame structure may be used by communicating component 661 to transmit communications to communicating component 602, which can be based on a grant of resources provided to the communicating component 661. The available resource element blocks for the UL may be partitioned into a data section and a control section. The control section may be formed at the two edges of the system bandwidth and may have a configurable size. The resource element blocks in the control section may be assigned to UEs for transmission of control information. The data section may include all resource element blocks not included in the control section. The UL frame structure results in the data section including contiguous subcarriers, which may allow a single UE to be assigned all of the contiguous subcarriers in the data section.

A UE may be assigned

resource element blocks

410a, 410b in the control section to transmit control information to an eNB. The UE may also be assigned

resource element blocks

420a, 420b in the data section to transmit data to the eNB. The UE may transmit control information in a physical UL control channel (PUCCH) on the assigned resource element blocks in the control section. The UE may transmit only data or both data and control information in a physical UL shared channel (PUSCH) on the assigned resource element blocks in the data section. A UL transmission may span both slots of a subframe and may hop across frequency.

A set of resource element blocks may be used to perform initial system access and achieve UL synchronization in a physical random access channel (PRACH) 430. The PRACH 430 carries a random sequence and cannot carry any UL data/signaling. Each random access preamble occupies a bandwidth corresponding to six consecutive resource element blocks. The starting frequency is specified by the network. That is, the transmission of the random access preamble is restricted to certain time and frequency resources. There is no frequency hopping for the PRACH. The PRACH attempt is carried in a single subframe (1 ms) or in a sequence of few contiguous subframes and a UE can make only a single PRACH attempt per frame (10 ms) .

FIG. 5 is a diagram 500 illustrating an example of a radio protocol architecture for the user and control planes in LTE. The radio protocol architecture for the UE (e.g., used by a communicating component 661) and the eNB (e.g., used by a communicating component 602) is shown with three layers: Layer 1, Layer 2, and Layer 3. Layer 1 (L1 layer) is the lowest layer and implements various physical layer signal processing functions. The L1 layer will be referred to herein as the physical layer 506. Layer 2 (L2 layer) 508 is above the physical layer 506 and is responsible for the link between the UE and eNB over the physical layer 506.

In the user plane, the L2 layer 508 includes a media access control (MAC) sublayer 510, a radio link control (RLC) sublayer 512, and a packet data convergence protocol (PDCP) 514 sublayer, which are terminated at the eNB on the network side. Although not shown, the UE may have several upper layers above the L2 layer 508 including a network layer (e.g., IP layer) that is terminated at the PDN gateway 118 on the network side, and an application layer that is terminated at the other end of the connection (e.g., far end UE, server, etc. ) .

The PDCP sublayer 514 provides multiplexing between different radio bearers and logical channels. The PDCP sublayer 514 also provides header compression for upper layer data packets to reduce radio transmission overhead, security by ciphering the data packets, and handover support for UEs between eNBs. The RLC sublayer 512 provides segmentation and reassembly of upper layer data packets, retransmission of lost data packets, and reordering of data packets to compensate for out-of-order reception due to hybrid automatic repeat request (HARQ) . The MAC sublayer 510 provides multiplexing between logical and transport channels. The MAC sublayer 510 is also responsible for allocating the various radio resources (e.g., resource element blocks) in one cell among the UEs. The MAC sublayer 510 is also responsible for HARQ operations.

In the control plane, the radio protocol architecture for the UE and eNB is substantially the same for the physical layer 506 and the L2 layer 508 with the exception that there is no header compression function for the control plane. The control plane also includes a radio resource control (RRC) sublayer 516 in Layer 3 (L3 layer) . The RRC sublayer 516 is responsible for obtaining radio resources (i.e., radio bearers) and for configuring the lower layers using RRC signaling between the eNB and the UE.

FIG. 6 is a block diagram of an eNB 610 in communication with a UE 650 in an access network. In the DL, upper layer packets from the core network are provided to a controller/processor 675. The controller/processor 675 implements the functionality of the L2 layer. In the DL, the controller/processor 675 provides header compression, ciphering, packet segmentation and reordering, multiplexing between logical and transport channels, and radio resource allocations to the UE 650 based on various priority metrics. The controller/processor 675 is also responsible for HARQ operations, retransmission of lost packets, and signaling to the UE 650.

The transmit (TX) processor 616 implements various signal processing functions for the L1 layer (i.e., physical layer) . The signal processing functions includes coding and interleaving to facilitate forward error correction (FEC) at the UE 650 and mapping to signal constellations based on various modulation schemes (e.g., binary phase-shift keying (BPSK) , quadrature phase-shift keying (QPSK) , M-phase-shift keying (M-PSK) , M-quadrature amplitude modulation (M-QAM) ) . The coded and modulated symbols are then split into parallel streams. Each stream is then mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., pilot) in the time and/or frequency domain, and then combined together using an Inverse Fast Fourier Transform (IFFT) to produce a physical channel carrying a time domain OFDM symbol stream. The OFDM stream is spatially precoded to produce multiple spatial streams. Channel estimates from a channel estimator 674 may be used to determine the coding and modulation scheme, as well as for spatial processing. The channel estimate may be derived from a reference signal and/or channel condition feedback transmitted by the UE 650. Each spatial stream is then provided to a different antenna 620 via a separate transmitter 618TX. Each transmitter 618TX modulates an RF carrier with a respective spatial stream for transmission. In addition, eNB 610 may include a communicating component 602 configured to transmit resource grants (e.g., for control and/or data uplink communications) to UEs 115 for communicating with the access points 105. The communicating component 602 can also communicate with the UE 650 over multiple downlink resources, and can receive feedback from UE 650 for multiple communications in multiple transmissions from the UE 650, which may occur concurrently, as described herein.. Though communicating component 602 is shown as coupled to controller/processor 675, it is to be appreciated that communicating component 602 can also be coupled to other processors (e.g., TX processor 616, RX processor 670, etc. ) and/or implemented by the one or

more processors

616, 670, 675 to perform actions described herein.

At the UE 650, each receiver 654RX receives a signal through its respective antenna 652. Each receiver 654RX recovers information modulated onto an RF carrier and provides the information to the receive (RX) processor 656. The RX processor 656 implements various signal processing functions of the L1 layer. The RX processor 656 performs spatial processing on the information to recover any spatial streams destined for the UE 650. If multiple spatial streams are destined for the UE 650, they may be combined by the RX processor 656 into a single OFDM symbol stream. The RX processor 656 then converts the OFDM symbol stream from the time-domain to the frequency domain using a Fast Fourier Transform (FFT) . The frequency domain signal comprises a separate OFDM symbol stream for each subcarrier of the OFDM signal. The symbols on each subcarrier, and the reference signal, is recovered and demodulated by determining the most likely signal constellation points transmitted by the eNB 610. These soft decisions may be based on channel estimates computed by the channel estimator 658. The soft decisions are then decoded and deinterleaved to recover the data and control signals that were originally transmitted by the eNB 610 on the physical channel. The data and control signals are then provided to the controller/processor 659.

The controller/processor 659 implements the L2 layer. The controller/processor can be associated with a memory 660 that stores program codes and data. The memory 660 may be referred to as a computer-readable medium. In the UL, the controller/processor 659 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover upper layer packets from the core network. The upper layer packets are then provided to a data sink 662, which represents all the protocol layers above the L2 layer. Various control signals may also be provided to the data sink 662 for L3 processing. The controller/processor 659 is also responsible for error detection using an acknowledgement (ACK) and/or negative acknowledgement (NACK) protocol to support HARQ operations. In addition, UE 650 may include a communicating component 661 for receiving a plurality of communications from eNB 610, and transmitting feedback for the plurality of communications to the eNB 610 over multiple antenna resources (e.g., over multiple antennas 652 and/or related transmitters 654TX) . Though communicating component 661 is shown as coupled to controller/processor 659, it is to be appreciated that communicating component 661 can also be coupled to other processors (e.g., RX processor 656, TX processor 668, etc. ) and/or implemented by the one or

more processors

656, 659, 668 to perform actions described herein.

In the UL, a data source 667 is used to provide upper layer packets to the controller/processor 659. The data source 667 represents all protocol layers above the L2 layer. Similar to the functionality described in connection with the DL transmission by the eNB 610, the controller/processor 659 implements the L2 layer for the user plane and the control plane by providing header compression, ciphering, packet segmentation and reordering, and multiplexing between logical and transport channels based on radio resource allocations by the eNB 610. The controller/processor 659 is also responsible for HARQ operations, retransmission of lost packets, and signaling to the eNB 610.

Channel estimates derived by a channel estimator 658 from a reference signal or feedback transmitted by the eNB 610 may be used by the TX processor 668 to select the appropriate coding and modulation schemes, and to facilitate spatial processing. The spatial streams generated by the TX processor 668 are provided to different antenna 652 via separate transmitters 654TX. Each transmitter 654TX modulates an RF carrier with a respective spatial stream for transmission.

The UL transmission is processed at the eNB 610 in a manner similar to that described in connection with the receiver function at the UE 650. Each receiver 618RX receives a signal through its respective antenna 620. Each receiver 618RX recovers information modulated onto an RF carrier and provides the information to a RX processor 670. The RX processor 670 may implement the L1 layer.

The controller/processor 675 implements the L2 layer. The controller/processor 675 can be associated with a memory 676 that stores program codes and data. The memory 676 may be referred to as a computer-readable medium. In the UL, the controller/processor 675 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover upper layer packets from the UE 650. Upper layer packets from the controller/processor 675 may be provided to the core network. The controller/processor 675 is also responsible for error detection using an ACK and/or NACK protocol to support HARQ operations.

Referring to FIGs. 7-9, aspects are depicted with reference to one or more components and one or more methods that may perform the actions or functions described herein. In an aspect, the term “component” as used herein may be one of the parts that make up a system, may be hardware or software or some combination thereof, and may be divided into other components. Although the operations described below in FIGs. 8 and 9 are presented in a particular order and/or as being performed by an example component, it should be understood that the ordering of the actions and the components performing the actions may be varied, depending on the implementation. Moreover, it should be understood that the following actions or functions may be performed by a specially-programmed processor, a processor executing specially-programmed software or computer-readable media, or by any other combination of a hardware component and/or a software component capable of performing the described actions or functions.

FIG. 7 illustrates an example system 700 for communicating feedback for multiple transmissions by using multiple antenna resources. System 700 includes a UE 702 that communicates with an eNB 704 to receive resources for receiving and transmitting communications in the wireless network. UE 702 includes a communicating component 661, as described above, which can facilitate receiving resource grants from eNB 704 and communicating over the granted resources, and eNB 704 includes a communicating component 602 for generating and communicating the resource grants for UE 702 and/or other UEs, and communicating over the granted resources with the UE 702 and/or other UEs.

Communicating component 661 may include one or more components, which may include a feedback generating component 710 for generating feedback for multiple communications received from an eNB over multiple resources, a resource mapping component 712 for mapping the feedback for transmission over multiple antenna resources, and/or an optional feature indicating component 714 for indicating one or more features of the UE 702 to the eNB. Communicating component 602 may include one or more components, which may include a feedback receiving component 720 for receiving feedback from a UE over multiple resources, and/or an optional feature indication receiving component 722 for obtaining one or more indications of features of the UE.

In an example, eNB 704 and UE 702 can be configured to communicate using a TDD configuration. For example, eNB 704, and/or other components of a related wireless network, can configure the UE 702 to communicate using the TDD configuration. Configuring the UE 702 may include specifying a certain subframe configuration to utilize, and the UE 702 may include multiple physical and/or virtual antennas and/or related antenna resources (not shown, but may correspond to multiple antennas 652, transmitters 654TX, transmit processors 668, etc. shown in FIG. 6) . In an example, the antenna resources may each be configured to use the same subframe configuration in TDD, and may be substantially synchronized in time. In other examples, UE 702 can be configured to communicate with eNB 704 over the multiple antennas or related resources using a frequency division duplexing (FDD) configuration, a combination FDD/TDD configuration, etc.

FIG. 8 illustrates an example method 800 for communicating feedback for multiple received transmissions over multiple antenna resources. Method 800 includes, at Block 802, receiving downlink transmissions over a plurality of configured downlink resources. Communicating component 661 (FIG. 7) can receive the downlink transmissions over the plurality of configured downlink resources. For example, communicating component 661 can receive downlink transmissions from eNB 704 over downlink resources previously configured to the UE 702 by eNB 704. An example of configured resources is shown in FIG. 10, which depicts a plurality of system frames 1000 (system frame number (SFN) 1-3) each having TDD configured subframes on one or more

downlink transport channels

1002, 1004. In this specific example, each subframe is designated as a downlink (D) subframe, an uplink (U) subframe, or a special (S) subframe (during which the subframes are switched from downlink to uplink) .

In an example, feedback generating component 710 can generate feedback for the downlink transmissions. The feedback can correspond to HARQ feedback indicating an acknowledgement (ACK) of receiving the downlink transmissions or a non-acknowledgement (NACK) of not properly receiving the downlink transmissions. For example, FIG. 10 depicts generating of ACKs and/or NACKs for data received over downlink transport 1 1002 and downlink transport 2 1004 in SFN1, subframe 9, and SFN2,

subframes

0, 1, and 3, and additionally for data received over SFN2, subframe 9, and SFN3,

subframes

0, 1, and 3. Aspects described herein relate to sending feedback for each of the four transmissions in a similar time period.

Method 800 also includes, at Block 804, multiplexing first feedback for the first downlink transmissions received in a first portion of the downlink resources for transmission over a first antenna resource, and at Block 806, multiplexing second feedback for the downlink transmissions received in a second portion of the downlink resources for transmission over a second antenna resource. Resource mapping component 712 can multiplex the first feedback for the downlink transmissions received in a first portion of the downlink resources for transmission over a first antenna resource, and can multiplex the second feedback for the downlink transmissions received in the second portion of the downlink resources for transmission over a second antenna resource.

For example, multiplexing feedback related to transmissions over a first set of resources and separately multiplexing feedback related to transmissions over a second set of resources allows for the feedback for the first and second sets of resources to be separately transmitted. This can be advantageous over conventional feedback resource mapping using multiplexing over a single set of resources, which may consume an unnecessary amount of resources, as described in specific examples below. Accordingly, resource mapping component 712 can map the feedback over resources on two different antenna resources for concurrent transmission of the feedback. In a specific example, this can include mapping the feedback on two PUCCHs on each antenna resource. In the example above, this allows for transmitting the feedback using uplink control indication (UCI) format 1b with two bits on one antenna resource representing feedback for two of the downlink transmissions, and two bits on another antenna resource representing feedback for another two of the downlink transmissions.

Moreover, the feedback on each antenna resource can be multiplexed where multiple communications are received on the downlink resources related to the feedback, for example. This is also shown in FIG. 10, where the feedback for communications received in SFN1, subframe 9 on both

downlink transport channels

1002 and 1004 are multiplexed and transmitted in subframe 1010 over a first uplink transmission antenna resource as one unit of feedback (e.g., one PUCCH, one bit, etc. ) , along with feedback for communications received over SFN2, subframe 0 as another unit of feedback. In any case, two units of feedback are used to transmit feedback in subframe 1010, which can utilize format 1b without channel selection. In addition, feedback for communications received in SFN2, subframe 1 on both

downlink transport channels

1002 and 1004 are multiplexed and transmitted in subframe 1012 over a second uplink transmission antenna resource as one unit of feedback, along with feedback for communications received over SFN2, subframe 3 as another unit of feedback. The feedback in

subframes

1010 and 1012 can be concurrently transmitted using the first and second uplink transmission antenna resources, as described herein.

In a specific example, in conventional format 1b in LTE, 2 bits of information are supported. Thus, feedback for more than two communications can require additional feedback transmissions over additional resources. Format 1b with channel selection can be used, but this consumes additional resources (e.g., four times the resources to provide two additional feedback bits) . In conventional format 1b without channel selection in LTE, if there is PDSCH transmission indicated by the detection of corresponding physical downlink control channel (PDCCH) or there is PDCCH indicating semi-persistent scheduling (SPS) release within subframe (s) n-k, depending on the subframe n and the UL-DL configuration, a UE first selects a c value out of {0, 1, 2, 3} from the below table:

which makes:

where

is the resource block size in the frequency domain,

is the downlink bandwidth configuration shown in the table above,

is the PUCCH resource for transmitting feedback for a given transmission over the downlink resources for antenna p derived from subframe n –k, k∈K, K is a set of M elements {k₀, k₁, ... k_M-1} corresponding to scheduled downlink subframe indices for the UE, m is the index of the smallest k value in the K set of M elements, n_CCE is the number of the first control channel elements (CCE) used for transmission of the corresponding PDCCH in subframe n-k_m, k_m is the smallest value in set such that UE detects a PDCCH in subframe n-k_m, and

is a value determined in system information (e.g., system information block 2) from the eNB. Also, in the above example and table,

Accordingly, for example, using the above and based on n_CCE allocation, a UE can determine the corresponding N_c and N_c+1, which gives the corresponding PUCCH resources for transmitting feedback for the communication received over the downlink resources. In one specific example using the formula above, in subframe assignment (SA) 2 in TDD for LTE, K, the set of subframes over which the UE detects communications over downlink resources, can be the set {8, 7, 4, 6} . Accordingly, M ＝ 4 and k ＝ 2. A UE can determine the value for N_c and N_c+1 based at least in part on the control format indicator (CFI) , which may be 0 and 22 for CFI ＝ 1, 23 and 54 for CFI ＝ 2, and 56 and 88 in CFI ＝ 3, based on the table and formula above for

Thus, for 0≤n_CCE<22, the PUCCH resource index for communicating feedback is

for 22≤n_CCE<55, the PUCCH resource index is

and for 55≤n_CCE<88, the PUCCH resource index is

In format 1b with channel selection, in LTE, four PUCCH resources are configured for communicating feedback, where each of the four resources correspond to an index N1_PucchAN, 0, N1_PucchAN, 1, N1_PucchAN, 2, or N1_PucchAN, 3, which may unnecessarily consume resources as an additional two bits provide channel selection information.

Thus, in the specific example above to optimize feedback resource utilization, in mapping feedback from four transmissions from eNB, as shown in SFN1, subframe 0, and SFN2, subframes 0, 1, and 3 in FIG. 10, resource mapping component 712 can map feedback for the four transmissions over two PUCCH resources on each of the two uplink transmission antenna resources such that the two PUCCH resources on one uplink transmission antenna resource includes feedback for two of the subframes using format 1b without channel selection by excluding N1_PucchAN, 2, and N1_PucchAN, 3 (thus consuming 2 bits) , and the two PUCCH resources on the other uplink transmission antenna resource includes the remaining feedback in a similar format. For example, resource mapping component 712 can accordingly configure the two PUCCHs on a given antenna resource as:

for two antennas (e.g.,

antennas

0 and 1, respectively, with

referring to antenna 0 and

referring to antenna 1) .

Method 800 also includes, at Block 808, transmitting, using the first antenna resource, the first feedback over first uplink resources, and at Block 810, transmitting, concurrently with the first feedback and using the second antenna resource, the second feedback over second uplink resources. Communicating component 661 can transmit, using the first antenna resource, the first feedback over first uplink resources, and transmit, concurrently with the first feedback and using the second antenna resource, the second feedback over second uplink resources. As described, communicating component 661 can transmit over the two antenna resources, which can correspond to two physical or virtual antenna ports/antennas, two RF and/or baseband chains, etc., which may include transmitting in MIMO, and/or the like. Moreover, in an example, communicating component 661 may transmit the PUCCHs in adjacent frequencies or over the same frequency, using two separate carriers or the same carrier (e.g., where the PUCCH transmissions can each use a different cyclic shift to facilitate detecting the separate PUCCHs) , etc.

Though described in terms of TDD above, it is to be appreciated that resource mapping component 712 can similarly map feedback resources for an FDD configuration to multiple antenna resources. For example, communicating component 661 can receive downlink communications from eNB 704 over multiple downlink carriers in carrier aggregation, which may include receiving the communications synchronously in synchronous FDD. Feedback generating component 710 can accordingly generate feedback for the communications, and resource mapping component 712 can map feedback for each of the communications over the multiple carriers as described above (e.g., feedback for two transport blocks of one carrier on one antenna resource, and for two transport blocks of another carrier on another antenna resource) . In both TDD and FDD systems, this allows more resource blocks that can be utilized for allocating PUSCH data, which can assist in improving services that maximize PUSCH data, such as voice over LTE or other streaming services.

For example, method 800 optionally includes, at Block 812, indicating a capability of transmitting first feedback concurrently with second feedback using multiple antenna resources over different uplink common channel resources. Feature indicating component 714 can indicate the capability of transmitting first feedback concurrently with second feedback using multiple antenna resources over different uplink common channel resources. For example, feature indicating component 714 can transmit a feature group indicator (FGI) or other parameter (s) to eNB 704 (e.g., when UE 702 is provisioned on the network, connects to eNB 704, etc. ) to indicate the capability. Where this capability is indicated, for example, feature indication receiving component 722 can receive the indication from the UE 702, and can accordingly expect to receive the feedback for multiple communications over different resources and/or can configure the UE 702 to transmit concurrent feedback over difference resources, as described further below.

Moreover, in this regard, eNB 704 can schedule the PUCCH without the need to specify the additional resources per PUCCH for the conventional format 1b with channel selection (e.g., N1_PucchAN, 2 and N1_PucchAN, 3) . Accordingly, UE 702 can deduce N1_PucchAN, 0 and N1_PucchAN, 1 as the resources for concurrent PUCCH transmissions (e.g., from system information block (SIB) 2) , and the eNB 704 can assume the UE 702 uses only N1_PucchAN, 0 and N1_PucchAN, 1 for mapping feedback.

In this regard, method 800 also optionally includes, at Block 814, receiving a configuration from a base station indicating to transmit first feedback over first uplink resources concurrently with second feedback over second uplink resources. Communicating component 661 can receive the configuration from the base station indicating to transmit first feedback over first uplink resources concurrently with second feedback over second uplink resources. This can be based at least in part on indicating the capability by feature indicating component 714, in an example. Moreover, for example, communicating component 661 can receive the configuration in a SIB or other system information communication from eNB 704. In one example, the configuration can include eNB specifying to include only N1_PucchAN, 0 and N1_PucchAN, 1 in feedback, which can indicate not to includeother indices (e.g., N1_PucchAN, 2 and N1_PucchAN, 3) . This can accordingly indicate that where the UE 702 is to transmit feedback for more than 2 resources, it can do so concurrently using N1_PucchAN, 0 and N1_PucchAN, 1, as described above.

In either case, for example, communicating component 661 can transmit the first feedback over the first antenna resource concurrently with the second feedback over the second antenna resource based on the indicated capability and/or the received configuration, as described above.

FIG. 9 illustrates a method 900 for receiving feedback from a UE over multiple uplink resources. Method 900 includes, at Block 902, transmitting, to a UE, downlink transmissions over a plurality of configured downlink resources. Communicating component 602 (FIG. 7) can transmit, to the UE (e.g., UE 702) , downlink transmissions over the plurality of configured downlink resources. In a specific example, the transmissions can be represented by those shown in FIG. 10 in SFN1, subframe 9, and SFN2,

subframes

0, 1, and 3, as described. In another specific example, the downlink transmissions can be over multiple carriers in carrier aggregation in an FDD configuration.

Method 900 also includes, at Block 904, receiving, from the UE over first uplink resources, first multiplexed feedback for the downlink transmissions transmitted in a first portion of the downlink resources, and at Block 906, receiving, from the UE over second uplink resources and concurrently with the first multiplexed feedback, second multiplexed feedback for the downlink transmissions transmitted in a second portion of the downlink resources. Feedback receiving component 720 can receive, from the UE over first uplink resources, first multiplexed feedback for the downlink transmissions transmitted in the first portion of the downlink resources, and receive, from the UE over second uplink resources and concurrently with the first multiplexed feedback, second multiplexed feedback for the downlink transmissions transmitted in the second portion of the downlink resources. As described, in the specific example above, this can include receiving the feedback in subframe 1010 over the first uplink transmission resources and in subframe 1012 over the second uplink transmission resources. Moreover, the feedbacks can each be multiplexed to include feedback for multiple downlink transport channels, as described. Moreover, as described, eNB 704 can expect to receive feedback data formatted in this regard based on a FGI received from UE 702 and/or can indicate to the UE 702 to utilize the feedback format.

Accordingly, for example, method 900 optionally includes, at Block 908, configuring a UE to transmit first feedback over first uplink resources concurrently with second feedback over second uplink resources. Communicating component 602 can configure the UE to transmit first feedback over first uplink resources concurrently with second feedback over second uplink resources. For example, communicating component 602 can signal an indication to the UE 702 in dedicated signaling and/or can utilize broadcast signaling, as described. In either case, the indication may be an explicit instruction to the UE 702 to concurrently transmit feedback, and/or may be an implicit instruction based on one or more configuration parameters (e.g., specifying a limited number of feedback indices, such as N1_PucchAN, 0 and N1_PucchAN, 1 as described above) .

Method 900 also optionally includes, at Block 910, receiving, from the UE, an indication of a capability of transmitting first feedback concurrently with second feedback using multiple antenna resources over different common uplink resources. Feature indication receiving component 722 can receive, from the UE (e.g., UE 702) , the indication of the capability of transmitting first feedback concurrently with second feedback using multiple antenna resources over different common uplink resources. As described, this can include feature indication receiving component 722 receiving a FGI from UE 702 that indicates the capability (e.g., during provisioning of the UE 702, a connection establishment procedure with UE 702, etc. ) . Moreover, as described, communicating component 602 may configure the UE 702 to transmit the concurrent feedback based at least in part on receiving the indication of the capability from the UE 702.

In either case, for example, feedback receiving component 720 can receive, from the UE (e.g., UE 702) , first feedback over the first antenna resource concurrently with second feedback over the second antenna resource based on the configuration and/or the received indication, as described above.

FIG. 11 is a diagram illustrating an example of a hardware implementation for an apparatus 1100 employing a processing system 1114. The processing system 1114 may be implemented with a bus architecture, represented generally by the bus 1124. The bus 1124 may include any number of interconnecting buses and bridges depending on the specific application of the processing system 1114 and the overall design constraints. The bus 1124 links together various circuits including one or more processors and/or hardware modules, represented by the processor 1104, the communicating component 602, communicating component 661 (FIG. 7) , and/or the computer-readable medium 1106. The bus 1124 may also link various other circuits such as timing sources, peripherals, voltage regulators, and power management circuits, which are well known in the art, and therefore, will not be described any further.

The processing system 1114 may be coupled to a transceiver 1110. The transceiver 1110 is coupled to one or more antennas 1120. The transceiver 1110 provides a means for communicating with various other apparatus over a transmission medium. In addition, the transceiver 1110 may be configured to receive resource grants for transmitting a frame structure and/or user data for transmission to one or more eNBs. The processing system 1114 includes a processor 1104 coupled to a computer-readable medium 1106. The processor 1104 is responsible for general processing, including the execution of software stored on the computer-readable medium 1106. The software, when executed by the processor 1104, causes the processing system 1114 to perform the various functions described supra for any particular apparatus. The computer-readable medium 1106 may also be used for storing data that is manipulated by the processor 1104 when executing software. The processing system can further include at least one of communicating component 602 (and related components) , communicating component 661 (and its related components) (FIG. 7) , etc., which can perform actions described above at least with respect to method 800 (FIG. 8) , method 900 (FIG. 9) , etc., which may be based on the TDD subframe configuration in FIG. 10, for example. The modules/components may be software modules running in the processor 1104, resident/stored in the computer-readable medium 1106, one or more hardware modules coupled to the processor 1104, or some combination thereof. The processing system 1114 may thus be a component of the eNB 610 or UE 650 and may include the

memory

676, 660 and/or at least one of the

TX processor

616, 668, the

RX processor

670, 656, and the controller/

processor

675, 659.

It is understood that the specific order or hierarchy of steps in the processes disclosed is an illustration of exemplary approaches. Based upon design preferences, it is understood that the specific order or hierarchy of steps in the processes may be rearranged. Further, some steps may be combined or omitted. The accompanying method claims present elements of the various steps in a sample order, and are not meant to be limited to the specific order or hierarchy presented.

The previous description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects. Thus, the claims are not intended to be limited to the aspects shown herein, but is to be accorded the full scope consistent with the language claims, wherein reference to an element in the singular is not intended to mean “one and only one” unless specifically so stated, but rather “one or more. ” Unless specifically stated otherwise, the term “some” refers to one or more. All structural and functional equivalents to the elements of the various aspects described herein that are known or later come to be known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be encompassed by the claims. Moreover, nothing disclosed herein is intended to be dedicated to the public regardless of whether such disclosure is explicitly recited in the claims. No claim element is to be construed as a means plus function unless the element is expressly recited using the phrase “means for. ”

Claims

A method of wireless communication， comprising：

receiving downlink transmissions over a plurality of configured downlink resources；

multiplexing first feedback for the downlink transmissions received in a first portion of the downlink resources for transmission over a first antenna resource；

multiplexing second feedback for the downlink transmissions received in a second portion of the downlink resources for transmission over a second antenna resource；

transmitting， using the first antenna resource， the first feedback over first uplink resources； and

transmitting， concurrently with the first feedback and using the second antenna resource， the second feedback over second uplink resources.
The method of claim 1， wherein multiplexing the first feedback and multiplexing the second feedback comprise utilizing an uplink control indication format lb in long term evolution (LTE) .
The method of claim 1， wherein the first antenna resource includes a first physical antenna of a user equipment， and the second antenna resource includes a second physical antenna of the user equipment.
The method of claim 1， further comprising receiving a configuration from a base station indicating to transmit the first feedback over the first uplink resources concurrently with the second feedback over the second uplink resources.
The method of claim 4， wherein receiving the configuration includes receiving a system information block message from the base station that configures a portion of feedback resources relating to a multiplexing format.
The method of claim 1， further comprising indicating a capability of transmitting first feedback concurrently with second feedback using multiple antenna resources over different uplink common channel resources.
The method of claim 1， wherein the downlink transmissions are received in a plurality of downlink subframes configured for downlink communications in time division duplexing (TDD) ， the first uplink resources include an uplink subframe configured for uplink communications， and the second uplink resources include the uplink subframe over a different baseband than the first uplink resources.
The method of claim 1， wherein the downlink transmissions are received over a plurality of carriers configured in carrier aggregation， the first feedback is transmitted over the first uplink resources of a first carrier， and the second feedback is transmitted over the second uplink resources of the first carrier or a second carrier.
The method of claim 8， wherein the first carrier and the second carrier are adjacent in frequency or are not adjacent in frequency.
The method of claim 9， wherein the first antenna resource includes a first digital signal processor for an antenna， and the second antenna resource includes a second digital signal processor for the antenna.
An apparatus for wireless communication， comprising：

a communicating component configured to receive downlink transmissions over a plurality of configured downlink resources； and

a resource mapping component configured to multiplex first feedback for the downlink transmissions received in a first portion of the downlink resources for transmission over a first antenna resource， and multiplex second feedback for the downlink transmissions received in a second portion of the downlink resources for transmission over a second antenna resource，

wherein the communicating component is further configured to transmit， using the first antenna resource， the first feedback over first uplink resources， and transmit， concurrently with the first feedback and using the second antenna resource， the second feedback over second uplink resources.
An apparatus for wireless communication， comprising：

means for receiving downlink transmissions over a plurality of configured downlink resources；

means for multiplexing first feedback for the downlink transmissions received in a first portion of the downlink resources for transmission over a first antenna resource；

means for multiplexing second feedback for the downlink transmissions received in a second portion of the downlink resources for transmission over a second antenna resource；

means for transmitting， using the first antenna resource， the first feedback over first uplink resources； and

means for transmitting， concurrently with the first feedback and using the second antenna resource， the second feedback over second uplink resources.
A non-transitory computer-readable medium storing computer executable code for wireless communication， comprising：

code executable to receive downlink transmissions over a plurality of configured downlink resources；

code executable to multiplex first feedback for the downlink transmissions received in a first portion of the downlink resources for transmission over a first antenna resource；

code executable to multiplex second feedback for the downlink transmissions received in a second portion of the downlink resources for transmission over a second antenna resource；

code executable to transmit， using the first antenna resource， the first feedback over first uplink resources； and

code executable to transmit， concurrently with the first feedback and using the second antenna resource， the second feedback over second uplink resources.
A method of wireless communication， comprising：

transmitting， to a user equipment， downlink transmissions over a plurality of configured downlink resources；

receiving， from the user equipment over first uplink resources， first multiplexed feedback for the downlink transmissions transmitted in a first portion of the downlink resources； and

receiving， from the user equipment over second uplink resources and concurrently with the first multiplexed feedback， second multiplexed feedback for the downlink transmissions transmitted in a second portion of the downlink resources.
The method of claim 14， wherein first multiplexed feedback and the second multiplexed feedback are multiplexed using an uplink control indication format lb in long term evolution (LTE) .
The method of claim 14， further comprising configuring the user equipment to transmit the first feedback over the first uplink resources concurrently with the second feedback over the second uplink resources.
The method of claim 16， wherein configuring the user equipment includes transmitting a system information block message that configures a portion of feedback resources relating to a multiplexing format.
The method of claim 14， further comprising receiving， from the user equipment， an indication of a capability of transmitting first feedback concurrently with second feedback using multiple antenna resources over different uplink common channel resources.
The method of claim 14， wherein the downlink transmissions are transmitted in a plurality of downlink subframes configured for downlink communications in time division duplexing (TDD) ， the first uplink resources include an uplink subframe configured for uplink communications， and the second uplink resources include the uplink subframe over a different baseband than the first uplink resources.
The method of claim 14， wherein the downlink transmissions are transmitted over a plurality of carriers configured in carrier aggregation， the first multiplexed feedback is received over the first uplink resources of a first carrier， and the second multiplexed feedback is received over the second uplink resources of a second carrier.
The method of claim 20， wherein the first carrier and the second carrier are adjacent in frequency or are not adjacent in frequency.
An apparatus for wireless communication， comprising：

a communicating component configured to transmit， to a user equipment， downlink transmissions over a plurality of configured downlink resources；

a feedback receiving component configured to receive， from the user equipment over first uplink resources， first multiplexed feedback for the downlink transmissions transmitted in a first portion of the downlink resources， and receive， from the user equipment over second uplink resources and concurrently with the first multiplexed feedback， second multiplexed feedback for the downlink transmissions transmitted in a second portion of the downlink resources.
An apparatus for wireless communication， comprising：

means for transmitting， to a user equipment， downlink transmissions over a plurality of configured downlink resources；

means for receiving， from the user equipment over first uplink resources， first multiplexed feedback for the downlink transmissions transmitted in a first portion of the downlink resources； and

means for receiving， from the user equipment over second uplink resources and concurrently with the first multiplexed feedback， second multiplexed feedback for the downlink transmissions transmitted in a second portion of the downlink resources.
A non-transitory computer-readable medium storing computer executable code for wireless communication， comprising：

code executable to transmit， to a user equipment， downlink transmissions over a plurality of configured downlink resources；

code executable to receive， from the user equipment over first uplink resources， first multiplexed feedback for the downlink transmissions transmitted in a first portion of the downlink resources； and

code executable to receive， from the user equipment over second uplink resources and concurrently with the first multiplexed feedback， second multiplexed feedback for the downlink transmissions transmitted in a second portion of the downlink resources.