JP6267732B2 - Transmission point indication in cooperative multipoint system - Google Patents

Description

<Cross-reference of related applications>
This application is entitled US ADVANCED WIRELESS COMMUNICATION SYSTEM AND TECHNIQUES, and is a US provisional patent filed November 4, 2011, the entire disclosure of which is incorporated herein by reference. Claims priority of application 61 / 556,109.

  Embodiments of the present invention generally relate to the field of communications, and more particularly to transmission point indications in wireless communication networks.

  Cooperative multipoint (CoMP) systems have been developed to improve various operating parameters in wireless networks. In a CoMP system that utilizes dynamic point selection (DPS), a transmission point may be selected from multiple nodes (eg, base stations) in a CoMP measurement set. Transmission points can be dynamically assigned by the serving node. However, since the user equipment does not know the identity or characteristics of the current transmission point, the location of the common reference signal (CRS, also called cell specific reference signal) across all nodes in the CoMP measurement set must be muted. Don't be.

  Embodiments will be readily understood by the following detailed description in conjunction with the accompanying drawings. For ease of this description, like reference numerals indicate like structural elements. Embodiments are shown by way of example and not limitation in the figures of the accompanying drawings.

FIG. 1 schematically illustrates a wireless communication network according to various embodiments. 2 is a configuration table according to various embodiments. 6 is a flowchart illustrating a transmission point indication method that may be performed by a user equipment according to various embodiments. 6 is a flowchart illustrating a transmission point indication method that may be performed by a base station according to various embodiments. FIG. 1 schematically illustrates an example system according to various embodiments.

  Exemplary embodiments of the present disclosure include, but are not limited to, methods, systems, and apparatus for transmission point indication in a cooperative multipoint (CoMP) system of a wireless communication network.

  Various aspects of the exemplary embodiments are described using terms commonly used by those skilled in the art to convey the substance of their work to others skilled in the art. However, it will be apparent to one skilled in the art that alternate embodiments may be implemented with only some of the described aspects. For purposes of explanation, specific numbers, materials, and configurations are set forth in order to provide a thorough understanding of the exemplary embodiments. However, it will be apparent to those skilled in the art that alternative embodiments may be practiced without specific details. In other instances, well-known features are omitted or simplified in order not to obscure the exemplary embodiments.

  Further, various operations are described as a plurality of discrete operations and also in a manner that is most useful for understanding exemplary embodiments. However, the order of description should not be construed to imply that these operations necessarily depend on the order. In particular, these operations need not be performed in the order of presentation.

  The phrase “in some embodiments” is used repeatedly. This phrase generally does not refer to the same embodiment, but it may be. The terms “comprising”, “having”, and “including” are synonymous unless the context indicates otherwise. The phrase “A and / or B” means (A), (B), or (A and B). The phrase “A / B” means (A), (B), or (A and B), similar to the phrase “A and / or B”. The phrase “at least one of A, B, and C” means (A), (B), (C), (A and B), (A and C), (B and C), or (A, B and C). The phrase “(A) B” means (B) or (A and B), ie, A is optional.

  While specific embodiments are shown and described herein, a wide variety of alternative and / or equivalent implementations may be shown and described without departing from the scope of the embodiments of the present disclosure. One skilled in the art will appreciate that it can be used instead of form. This application is intended to cover any adaptations or variations of the embodiments described herein. Therefore, it is manifestly intended that embodiments of the present disclosure be limited only by the claims and the equivalents thereof.

  As used herein, the term “module” executes one or more software or firmware programs, combinational logic circuits, and / or other suitable components that provide the functions described. , Application specific integrated circuit (ASIC), electronic circuit, processor (shared, dedicated, or group), and / or memory (shared, dedicated, or group), and part of them Or can include them.

  FIG. 1 schematically illustrates a wireless communication network 100 according to various embodiments. Wireless communication network 100 (hereinafter “network 100”) is a 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE), such as the Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN). ) Can be a network access network. Network 100 may include a base station, eg, enhanced node base station (eNB) 104, configured to communicate wirelessly with user equipment (UE) 108.

  At least initially, the eNB 104 may have an established wireless connection with the UE 108 and may operate as a serving node in the CoMP measurement set. One or more additional eNBs of network 100, eg, eNBs 112 and 116, may also be included in the CoMP measurement set. The eNBs 112 and 116 may be configured to facilitate wireless communication with the UE 108 in cooperation with the eNB 104. One or more additional eNBs may be collectively referred to as a “cooperative node”. The eNB may transition between the role of the cooperative node and the role of the service providing node.

  The serving node and the coordination node may communicate with each other via a wireless connection and / or a wired connection (eg, a high speed fiber backhaul connection).

  Each of the eNBs may generally have the same transmission power capability as each other, or some of the eNBs may have a relatively lower transmission power capability. For example, in one embodiment, eNB 104 may be a relatively high power base station, such as a macro eNB, while eNBs 112 and 116 may be relatively low power base stations, eg, pico eNBs and / or femto. It may be an eNB.

  The UE 108 may include a communication module 120, a mapping module 124, and a memory 128 coupled at least as shown. The communication module 120 may further be coupled to one or more of the plurality of antennas 132 of the UE 108 for communicating wirelessly across the network 100.

  UE 108 may include any suitable number of antennas. In various embodiments, the UE 108 may include at least as many antennas as the number of simultaneous spatial layers or streams received by the UE 108 from the eNB, although the scope of this disclosure may not be limited in this respect. The number of simultaneous spatial layers or streams may also be referred to as transmission rank, or simply rank.

  One or more of the antennas 132 may alternatively be used as transmit or receive antennas. Alternatively or additionally, one or more of the antennas 132 can be dedicated receive antennas or dedicated transmit antennas.

  In various embodiments, the communication module 120 may receive common reference signal (CRS) parameters associated with individual base stations of a CoMP measurement set (eg, eNBs 104, 112, and / or 116). For example, the CRS parameters may include an index, the number of CRS antenna ports, and / or a CRS frequency shift associated with each base station in the CoMP measurement set. These parameters can vary between base stations of a CoMP measurement set and can be used by the communication module 120 to accurately and efficiently identify the associated CRS transmission.

  FIG. 2 is a CRS configuration table 200 with various CRS parameters according to some embodiments. CRS configuration table 200 (hereinafter referred to as “table 200”) may be stored in memory 128 and may be accessible by mapping module 124. The transmission point index may be a value used later in communication of which node is a scheduled transmission point. The CRS antenna port can be either a virtual or physical antenna port of the base station from which the CRS transmission is transmitted. In some embodiments, the number of CRS antenna ports can be 1, 2, or 4. The CRS frequency shift can be a cell specific frequency shift (eg, in terms of the number of subcarriers) that can be used to avoid constant juxtaposition of reference signals from different cells. In some embodiments, the CRS frequency shift can be 0, 1, 2, 3, 4, or 5.

  In some embodiments, the CRS parameter further includes a resource element (eg, an OFDM frame) dedicated to control information and / or multicast / broadcast single frequency network (MBSFN) information for individual base stations of the CoMP measurement set. Information related to the quantity and / or location of (subcarriers and / or OFDM symbols). Resource elements used for control information and / or MBSFN subframes may not include CRS.

  In some embodiments, the UE 108 may store the received CRS parameters in the memory 128. The UE 108 may maintain the CRS parameters as long as the UE 108 is associated with the CoMP measurement set and / or for another suitable length of time.

  After configuration of table 200 with appropriate CRS parameters, communication module 120 corresponds to a base station of a CoMP measurement set scheduled for communication with UE 108 (eg, according to a dynamic point selection (DPS) protocol). A transmission point index may be received. The mapping module 124 may then access the CRS parameters corresponding to the received transmission point index and generate a physical downlink shared channel (PDSCH) mapping pattern based on the scheduled base station CRS parameters. The PDSCH mapping pattern may be used for subsequent communication with the scheduled base station. For example, the PDSCH mapping pattern may identify CRS locations (eg, resource elements) in orthogonal frequency division multiplexing (OFDM) frames transmitted by scheduled base stations. A resource element may correspond to one or more subcarriers and / or OFDM symbols in an OFDM frame. Thus, the PDSCH mapping pattern may be particularly adapted for scheduled base stations.

  In some embodiments, CRS parameters may be transmitted to UE 108 by a serving base station (eg, eNB 104). In some embodiments, CRS parameters may be sent to UE 108 via radio resource control (RRC) signaling. CRS parameters may be transmitted during configuration of a CoMP measurement set for UE 108 (eg, as part of a CoMP measurement set configuration protocol). The CoMP measurement set configuration protocol may also include configuration of an uplink control channel for channel state information reference signal (CSI-RS) parameters and / or channel state information (CSI) feedback. Accordingly, UE 108 may receive and / or transmit one or more CSI-RS parameters and / or uplink control channel parameters as part of the CoMP measurement set configuration protocol.

  In various embodiments, the communication module 120 may receive a transmission point index via physical layer signaling. For example, in one embodiment, the transmission point index may be included in downlink control information (DCI), eg, via a downlink control channel. This may allow dynamic communication of associated CRS parameters at the same time as dynamic switching of various transmission points in the DPS protocol. The DCI may further include other parameters for scheduling communication between the UE 108 and one or more base stations.

  The transmission point index may identify a base station (eg, transmission point) of a CoMP measurement set scheduled for communication with UE 108 (eg, for transmission on PDSCH). For example, the transmission point index may include one or more bits corresponding to the scheduled base station. In some embodiments, a small number of bits may be required to identify the scheduled base station. For example, if the CoMP measurement set includes two base stations, the transmission point index may include 1 bit, and / or if the CoMP measurement set includes three or four base stations, the transmission point index is 2 bits may be included. In other embodiments, the transmission point index may include the same number of bits regardless of the number of base stations included in the CoMP measurement set. It will be apparent that other suitable mechanisms for identifying scheduled base stations can be used.

  In some embodiments, the transmission point index may be transmitted by a scheduled base station. For example, the eNB 104 may send a transmission point index that identifies the eNB 104 as a scheduled base station to the UE 108. In other embodiments, the transmission point index may be transmitted by a base station that is different from the scheduled base station. For example, the eNB 104 may send a transmission point index that identifies the eNB 112 as a scheduled base station to the UE 108.

  The mapping module 124 may use the transmission point index to identify CRS parameters (eg, from memory 128) corresponding to the scheduled base station. The mapping module 124 may generate a PDSCH mapping pattern based on the CRS parameters for the scheduled base station. For example, the number of scheduled base station CRS antenna ports may be used to identify resource elements (eg, subcarriers and / or OFDM symbols) of an OFDM frame dedicated to CRS transmission. The CRS frequency shift can be specific to the scheduled base station and can be used to identify the CRS location (eg, resource element) of the OFDM frame for the scheduled base station.

  Communication module 120 may then receive one or more transmissions from the scheduled base station, the transmission including an OFDM frame having a plurality of CRSs. The CRS may be arranged in the OFDM frame according to the PDSCH mapping pattern.

  In various embodiments, transmission points (eg, scheduled base stations) may be dynamically assigned. The UE 108 may receive additional transmission point indexes when the scheduled base station identification changes and / or periodically at any suitable timing interval.

  eNB 104 may include a communication module 136 and a CoMP management module 140 coupled to each other at least as shown. The communication module 136 may further be coupled to one or more of the multiple antennas 152 of the eNB 104. Communication module 136 may communicate (eg, transmit and / or receive) with one or more UEs (eg, UE 108). In various embodiments, the eNB 104 may include at least as many antennas as the number of simultaneous transmission streams transmitted to the UE 108, although the scope of this disclosure may not be limited in this respect. One or more of the antennas 152 may alternatively be used as transmit or receive antennas. Alternatively or additionally, one or more of the antennas 152 can be dedicated receive antennas or dedicated transmit antennas. The CoMP management module 140 may transmit (eg, via the communication module 136) CRS parameters associated with individual base stations of the CoMP measurement set described above.

  Although not explicitly shown, eNBs 112 and 116 may include modules / components similar to those of eNB 104.

  The transmission point indications described herein allow the UE 108 to know which base station of the CoMP measurement set is scheduled as a transmission point for the UE 108 (eg, according to the DPS protocol). obtain. In addition, since the UE 108 can know the CRS parameters associated with the scheduled transmission point, it can generate a PDSCH mapping pattern that is particularly adapted to the scheduled base station.

  In a DPS system, a demodulation reference signal (DM-RS) antenna port may be dynamically assigned to a base station for transmission. The base station may apply the same precoding scheme as the PDSCH (eg, spatial and / or multiple-input multiple-output (MIMO) precoding scheme) to the DM-RS. Thus, the UE may not need to know the identification of the transmission point in order to receive the DM-RS and decode the PDSCH transmission. However, different base stations may have different numbers of CRS ports and / or have CRS frequency shifts that depend on the identity of the base station. Thus, the CRS configuration (eg, CRS placement within PDSCH transmission) may vary from one base station to another.

  In conventional CoMP systems, the location of CRS for all base stations in the CoMP measurement set can be muted in the PDSCH to enable DPS. However, this approach requires high overhead due to unused resources in the PDSCH. In addition, CRS location muting can adversely affect legacy UEs that make interference measurements with CRS (eg, UEs that are not capable of CoMP communication). For example, legacy UEs that make interference measurements at the CRS location cannot receive interference from other base stations (since other base stations mut the CRS location). Thus, legacy UEs may generate interference measurements that do not accurately measure interference from other base stations. This can lead to inaccurate modulation and coding decisions, which can also lead to increased errors and / or reduced throughput for legacy UEs.

  In contrast, the transmission point indications described herein allow the UE to know the CRS parameters of the base station scheduled for transmission to the UE. Thus, the UE may generate a PDSCH mapping pattern that is particularly adapted to the scheduled base station. The transmission by the base station may not require muting the location of the other base stations' CRS in the CoMP measurement set. This can save overhead from unused resources for all UEs associated with base stations in the CoMP measurement set (eg, UEs capable of CoMP communication and legacy UEs not capable of CoMP communication). . In addition, transmission point indication may not affect legacy UE interference measurements in CRS.

  FIG. 3 illustrates a transmission point indication method 300 according to various embodiments. Transmission point indication method 300 may be performed by a UE (eg, UE 108). In some embodiments, the UE includes and / or access to one or more computer readable media that store instructions that, when executed, cause the UE to perform the method 300. Can have.

  At block 304, the UE may receive CRS parameters via RRC signaling. The CRS parameters may be associated with individual base stations of a CoMP measurement set that includes multiple base stations. In some embodiments, the CRS parameters may include the number of CRS antenna ports and / or CRS frequency shifts of individual base stations in the CoMP measurement set. The UE may receive CRS parameters as part of the CoMP configuration protocol. The CoMP configuration protocol may also include configuring an uplink control channel for CSI-RS parameters and CSI-RS feedback. Thus, the UE may also receive one or more CSI-RS parameters and / or uplink control channel parameters via RRC signaling in addition to the CRS parameters. The UE may store the received CRS parameters in memory.

  At block 308, the UE may receive a transmission point index via DCI. The transmission point index may correspond to a scheduled base station of a CoMP measurement set scheduled for communication with the UE (eg, scheduled as a transmission point for the UE).

  At block 312, the UE may generate a PDSCH mapping pattern based on the received CRS parameters associated with the scheduled base station. The PDSCH mapping pattern may be used for subsequent communication between the UE and the scheduled base station. For example, the UE may receive a transmission on a PDSCH from a scheduled base station that includes an OFDM frame. An OFDM frame may include multiple CRSs arranged in the frame according to a PDSCH mapping pattern.

  FIG. 4 illustrates a transmission point indication method 400 that may be performed by a base station (eg, eNB 104) according to various embodiments. A base station may be a serving node of a CoMP measurement set that includes multiple base stations.

  At block 404, the base station may send CRS parameters to the UE via RRC signaling. CRS parameters may include the number of CRS antenna ports and / or CRS frequency shifts of individual base stations in the CoMP measurement set. The base station may send CRS parameters as part of the CoMP configuration protocol. The CoMP configuration protocol may also include configuring an uplink control channel for CSI-RS parameters and CSI-RS feedback.

  The base station may be preconfigured to know CRS parameters for multiple base stations in the CoMP measurement set. Alternatively or in addition, a base station may receive CRS parameters for one or more base stations from its respective base station. In some embodiments, the base station may store CRS parameters for multiple base stations in memory.

  In some embodiments, the CoMP management module may determine which base stations are included in the CoMP measurement set. The CoMP management module may be included in the base station and / or another location (eg, a core network including the base station). In some embodiments, the CoMP measurement set may be different for different UEs in the cell covered by the base station.

  At block 408, the CoMP management module may determine which base station of the CoMP measurement set is the scheduled base station for the UE. The scheduled base station determination may be made based on any suitable factor, eg, channel conditions, relative load at the base station, relative power of the base station, and / or other factors. .

  At block 412, the base station may transmit a transmission point index to the UE via DCI. The transmission point index may identify a scheduled base station of a CoMP measurement set scheduled as a transmission point for the UE. The scheduled base station may then transmit a PDSCH signal to the UE. In some embodiments, the transmission point index may be transmitted by a scheduled base station. In other embodiments, the transmission point index may be transmitted by another base station that is not a scheduled base station.

  The UE 108 described herein may be implemented in a system that uses any suitable hardware and / or software to configure as desired. FIG. 5 illustrates one or more processors 504, system control logic 508 coupled to at least one of the processors 504, system memory 512 coupled to system control logic 508, and system control logic 508 for one embodiment. Exemplary non-volatile memory (NVM) / storage 516, a network interface 520 coupled to system control logic 508, and an input / output (I / O) device 532 coupled to system control logic 508 System 500 is shown.

  The processor 504 may include one or more single core or multi-core processors. The processor 504 may include any combination of general purpose and special purpose processors (eg, graphics processors, application processors, baseband processors, etc.).

  The system control logic 508 for one embodiment provides any suitable interface to at least one of the processors 504 and / or to any suitable device or component that communicates with the system control logic 508. Any suitable interface controller may be included.

  System control logic 508 for one embodiment may include one or more memory controllers to provide an interface to system memory 512. System memory 512 may be used to load and store data and / or instructions, for example for system 500. The system memory 512 for one embodiment may include any suitable volatile memory, such as, for example, a suitable dynamic random access memory (DRAM).

  NVM / storage 516 may include one or more tangible non-transitory computer readable media used, for example, to store data and / or instructions. NVM / storage 516 can include any suitable non-volatile memory, such as, for example, flash memory, and / or, for example, one or more hard disk drives (HDDs), one or more compact disks (CDs). Any suitable non-volatile storage device may be included such as a drive and / or one or more digital versatile disk (DVD) drives.

  NVM / storage 516 may include storage resources that are physically part of the device on which system 500 is installed, or that is not necessarily part of that device, but accessible by that device. Can do. For example, NVM / storage 516 can be accessed across a network via network interface 520 and / or by input / output (I / O) device 532.

  Each of system memory 512 and NVM / storage 516 may include temporary and permanent copies of mapping logic 524 in particular. The mapping logic 524, when executed by at least one of the processors 504, results in the system 500 implementing a mapping module, eg, the mapping module 124, to perform the PDSCH mapping operations described herein. Instructions may be included. In some embodiments, the mapping logic 524 or its hardware, firmware, and / or software components reside in addition / or in the system control logic 508, the network interface 520, and / or the processor 504. obtain.

  The network interface 520 may have a transceiver 522 to provide a wireless interface for the system 500 to communicate across one or more networks and / or with any other suitable device. The transceiver 522 may implement the communication module 120. In various embodiments, the transceiver 522 can be integrated with other components of the system 500. For example, transceiver 522 may include a processor of processor 504, a memory of system memory 512, and an NVM / storage of NVM / storage 516. The network interface 520 may include any suitable hardware and / or firmware. The network interface 520 may include multiple antennas for providing a multiple input multiple output wireless interface. The network interface 520 for one embodiment may include, for example, a wired network adapter, a wireless network adapter, a telephone modem, and / or a wireless modem.

  For one embodiment, at least one of the processors 504 can be packaged with logic for one or more controllers of the system control logic 508. For one embodiment, at least one of the processors 504 can be packaged with logic for one or more controllers in the system control logic 508 to form a system in package (SiP). For one embodiment, at least one of the processors 504 can be integrated on the same die as the logic for one or more controllers of the system control logic 508. For one embodiment, at least one of the processors 504 may be integrated on the same die as the logic for one or more controllers of the system control logic 508 to form a system on chip (SoC). it can.

  In various embodiments, the I / O device 532 is a user interface designed to allow user interaction with the system 500, a peripheral component interface designed to allow peripheral component interaction with the system 500. And / or sensors designed to determine environmental conditions and / or location information associated with the system 500.

  In various embodiments, the user interface includes a display (eg, a liquid crystal display, a touch screen display, etc.), a speaker, a microphone, one or more cameras (eg, a still camera and / or a video camera), a flashlight (eg, Light emitting diode flash) and keyboard, but are not limited to these.

  In various embodiments, peripheral component interfaces may include, but are not limited to, non-volatile memory ports, universal serial bus (USB) ports, audio jacks, and power supply interfaces.

  In various embodiments, the sensors may include, but are not limited to, gyro sensors, accelerometers, proximity sensors, ambient light sensors, and positioning units. The positioning unit can also be part of the network interface 520 or interact with the network interface 520 to communicate with components of the positioning network, such as a global positioning system (GPS) satellite.

  In various embodiments, the system 500 can be a mobile computing device such as, but not limited to, a laptop computing device, a tablet computing device, a netbook, a smartphone, and the like. In various embodiments, the system 500 can have more or fewer components and / or different architectures.

  In some embodiments, receiving CRS parameters associated with individual base stations of a CoMP measurement set including a plurality of base stations and receiving a transmission point index corresponding to a first base station of the CoMP measurement set. An apparatus, eg, a UE, including a communication module configured in is described. The UE may further include a mapping module coupled to the communication module and configured to generate a PDSCH mapping pattern based on the CRS parameters associated with the first base station.

  In some embodiments, the communication module may be further configured to use CRS parameters associated with the first base station for subsequent communication with the first base station.

  In some embodiments, the CRS parameters and transmission point index may be received from the second base station of the CoMP measurement set. In other embodiments, the CRS parameter can be received from the second base station, and the transmission point index can be received from the first base station.

  In some embodiments, the CRS parameters may be received via radio resource control (RRC) signaling. The transmission point index can be received via physical layer signaling (eg, the transmission point index can be included in the downlink control information). CRS parameters may include the number of CRS antenna ports and / or CRS frequency shifts for individual base stations. In some embodiments, the CRS parameters may further include information related to OFDM resource elements dedicated to control information for individual base stations. In further embodiments, the CRS parameters may further include MBSFN information for individual base stations. In some embodiments, CRS parameters may be received as part of a configuration protocol for a CoMP measurement set. The configuration protocol may further include configuring CSI-RS parameters and uplink control channel parameters for communication between the user equipment and one or more base stations of the CoMP measurement set.

  In some embodiments, the communication module can be further configured to receive a transmission from the first base station, the transmission including an OFDM frame having a plurality of CRSs. The CRS may be placed in the frame according to the PDSCH mapping pattern.

  In some embodiments, the apparatus may further include a memory configured to store the received CRS parameters.

  In some embodiments, an apparatus, eg, a base station (such as an eNB), is associated with a communication module and CRS parameters associated with the individual base stations of a CoMP measurement set coupled to the communication module and including a plurality of base stations. And a CoMP management module configured to transmit to the UE via the communication module.

  In some embodiments, the CoMP management module may be further configured to transmit a transmission point index to the UE. The transmission point index may correspond to the first base station of the CoMP measurement set scheduled to communicate with the UE. In some embodiments, a scheduled base station may transmit a transmission point index. In other embodiments, a base station that is not a scheduled base station may transmit a transmission point index.

  In some embodiments, the base station can be a CoMP measurement set serving node configured to manage communication between the UE and multiple base stations of the CoMP measurement set.

  In some embodiments, CRS parameters may include the number of CRS antenna ports and / or CRS frequency shifts for individual base stations. CRS parameters may be sent via radio resource control signaling. The transmission point index may be transmitted to the UE in downlink control information transmission. In some embodiments, the CRS parameters may be transmitted as part of a configuration protocol for the CoMP measurement set. The configuration protocol may further include configuring channel state information reference signal (CSI-RS) parameters and uplink control channel parameters for communication between the UE and one or more base stations of the CoMP measurement set.

  In various embodiments, CRS parameters associated with individual base stations of a CoMP measurement set including a plurality of base stations are received by the UE via radio resource signaling, and the first of the coordinated multipoint measurement set Receiving a transmission point index corresponding to one of the base stations by the UE via downlink control information transmission, generating a PDSCH mapping pattern based on the CRS parameters associated with the first base station, Is disclosed.

  In various embodiments, when executed, causes a user equipment to receive CRS parameters associated with individual base stations of a CoMP measurement set that includes multiple base stations, wherein the CRS parameters are for CRS antenna ports of individual base stations. Stored instructions for receiving a transmission point index corresponding to the first base station of the coordinated multipoint measurement set and generating a PDSCH mapping pattern based on the CRS parameters associated with the first base station. One or more computer readable media are disclosed.

While certain specific embodiments have been shown and described herein for purposes of illustration, a wide variety of alternative and / or equivalent embodiments or implementations calculated to accomplish the same purpose are disclosed in this disclosure. Can be used in place of the illustrated and described embodiments without departing from the scope of the present invention. This application is intended to cover any adaptations or variations of the embodiments described herein. Therefore, it is manifestly intended that the embodiments described herein be limited only by the claims and the equivalents thereof.
[Item 1]
Receiving a plurality of common reference signal (CRS) parameters associated with a plurality of individual base stations of a coordinated multipoint (CoMP) measurement set including a plurality of base stations;
Receive a transmission point index corresponding to a first base station of the coordinated multipoint (CoMP) measurement set
A communication module;
A mapping module coupled to the communication module and generating a physical downlink shared channel (PDSCH) mapping pattern based on the plurality of common reference signal (CRS) parameters associated with the first base station;
Comprising user equipment.
[Item 2]
The communication module further uses the plurality of common reference signal (CRS) parameters associated with the first base station for subsequent communication with the first base station. User equipment.
[Item 3]
The user equipment of item 1, wherein the plurality of common reference signal (CRS) parameters and the transmission point index are received from a second base station of the coordinated multipoint (CoMP) measurement set.
[Item 4]
The plurality of common reference signal (CRS) parameters are received from a second base station of the coordinated multipoint (CoMP) measurement set, and the transmission point index is received from the first base station, item 1 User equipment as described in.
[Item 5]
The user equipment of item 1, wherein the plurality of common reference signal (CRS) parameters are received via radio resource control signaling.
[Item 6]
Item 6. The user equipment of item 5, wherein the transmission point index is received via physical layer signaling.
[Item 7]
The user equipment according to item 6, wherein the transmission point index is included in downlink control information.
[Item 8]
The user equipment of item 1, wherein the plurality of common reference signal (CRS) parameters include a number of CRS antenna ports or a CRS frequency shift of the plurality of individual base stations.
[Item 9]
9. The user equipment of item 8, wherein the plurality of common reference signal (CRS) parameters include the number of CRS antenna ports and the CRS frequency shift of the plurality of individual base stations.
[Item 10]
10. The user equipment of item 9, wherein the plurality of common reference signal (CRS) parameters further includes information related to orthogonal frequency division multiplexing (OFDM) resource elements dedicated to control information for the plurality of individual base stations. .
[Item 11]
The plurality of common reference signal (CRS) parameters further includes multicast / broadcast single frequency network (MBSFN) information for the plurality of individual base stations of the coordinated multipoint (CoMP) measurement set. User equipment as described.
[Item 12]
The communication module further receives a transmission from the first base station, the transmission including an Orthogonal Frequency Division Multiplexing (OFDM) frame having a plurality of CRSs, the plurality of CRSs being the physical downlink shared The user equipment according to item 1, wherein the user equipment is arranged in the orthogonal frequency division multiplexing (OFDM) frame according to a channel (PDSCH) mapping pattern.
[Item 13]
The plurality of common reference signal (CRS) parameters are received as part of a configuration protocol for the coordinated multipoint (CoMP) measurement set, the configuration protocol further comprising the user equipment and the coordinated multipoint (CoMP) Comprising configuring a plurality of channel state information reference signal (CSI-RS) parameters and a plurality of uplink control channel parameters for a plurality of communications with one or more base stations of the measurement set. User equipment as described in.
[Item 14]
Item 4. The user equipment of item 1, further comprising a memory for storing the received plurality of common reference signal (CRS) parameters.
[Item 15]
A communication module;
A plurality of common reference signal (CRS) parameters associated with a plurality of individual base stations of a coordinated multipoint (CoMP) measurement set including a plurality of base stations coupled to the communication module via the communication module A coordinated multipoint (CoMP) management module that transmits to a device (UE);
Including base stations.
[Item 16]
The cooperative multipoint (CoMP) management module is further configured to transmit a transmission point index to the user equipment (UE), and the transmission point index is scheduled to communicate with the user equipment (UE). 16. The base station according to item 15, corresponding to a first base station of the cooperative multipoint (CoMP) measurement set.
[Item 17]
Item 17. The base station according to item 16, wherein the base station is the first base station.
[Item 18]
The base station according to item 16, wherein the transmission point index is transmitted to the user equipment (UE) in downlink control information (DCI) transmission.
[Item 19]
19. The base station of item 18, wherein the plurality of common reference signal (CRS) parameters are transmitted to the user equipment (UE) via radio resource control signaling.
[Item 20]
20. The base station of any one of items 15-19, wherein the plurality of common reference signal (CRS) parameters includes a number of CRS antenna ports or a CRS frequency shift of the plurality of individual base stations.
[Item 21]
21. The base station of item 20, wherein the plurality of common reference signal (CRS) parameters includes the number of CRS antenna ports and the CRS frequency shift of the plurality of individual base stations.
[Item 22]
A scheduled base station of the coordinated multipoint (CoMP) measurement set scheduled to communicate with the user equipment (UE) transmits a transmission point index to the user equipment (UE), and the transmission point index The base station according to item 15, which corresponds to the scheduled base station.
[Item 23]
Item 23. The base station of item 22, wherein the base station is not the scheduled base station.
[Item 24]
The plurality of common reference signal (CRS) parameters are transmitted as part of a configuration protocol for the coordinated multipoint (CoMP) measurement set, the configuration protocol further comprising the user equipment (UE) and the coordinated multipoint. 16. A channel state information reference signal (CSI-RS) parameter and an uplink control channel parameter for configuring communication with one or more base stations of a (CoMP) measurement set. base station.
[Item 25]
The base station of the coordinated multipoint (CoMP) measurement set configured to manage communication between the user equipment (UE) and the base stations of the coordinated multipoint (CoMP) measurement set; Item 16. The base station according to item 15, which is a service providing node.
[Item 26]
Receive by a user equipment (UE) via radio resource signaling multiple common reference signal (CRS) parameters associated with multiple individual base stations of a coordinated multipoint (CoMP) measurement set including multiple base stations To do
Receiving a transmission point index corresponding to a first base station of the coordinated multipoint (CoMP) measurement set by the user equipment (UE) via downlink control information transmission;
Generating a physical downlink shared channel (PDSCH) mapping pattern based on the plurality of common reference signal (CRS) parameters associated with the first base station;
A method comprising:
[Item 27]
27. The method of item 26, wherein the plurality of common reference signal (CRS) parameters include a number of CRS antenna ports or a CRS frequency shift of the plurality of individual base stations.
[Item 28]
28. The method of item 27, wherein the plurality of common reference signal (CRS) parameters include the number of CRS antenna ports and the CRS frequency shift of the plurality of individual base stations.
[Item 29]
Further comprising receiving by the user equipment (UE) a transmission from the first base station, wherein the transmission includes an Orthogonal Frequency Division Multiplexing (OFDM) frame having a plurality of CRSs, the plurality of CRSs being 27. The method of item 26, arranged in the orthogonal frequency division multiplexing (OFDM) frame according to the physical downlink shared channel (PDSCH) mapping pattern.
[Item 30]
27. The method of item 26, further comprising storing the received plurality of common reference signal (CRS) parameters in a memory of the user equipment (UE).
[Item 31]
31. User equipment including a communication module that performs the method of any one of items 26-30.
[Item 32]
One or more computer-readable media storing a plurality of instructions, wherein the plurality of instructions are executed by the user equipment when
Receiving a plurality of common reference signal (CRS) parameters associated with a plurality of individual base stations of a coordinated multipoint (CoMP) measurement set including a plurality of base stations, wherein the plurality of common reference signal (CRS) parameters are: Including the number of CRS antenna ports of the plurality of individual base stations;
Receiving a transmission point index corresponding to a first base station of the coordinated multipoint (CoMP) measurement set;
Generating a physical downlink shared channel (PDSCH) mapping pattern based on the plurality of common reference signal (CRS) parameters associated with the first base station;
One or more computer-readable media.
[Item 33]
33. The one or more computer readable media of item 32, wherein the plurality of common reference signal (CRS) parameters are received via radio resource control signaling.
[Item 34]
34. The one or more computer readable media of item 33, wherein the transmission point index is received via downlink control information transmission.
[Item 35]
33. The one or more computer readable media of item 32, wherein the plurality of common reference signal (CRS) parameters further comprises CRS frequency shifts of the plurality of individual base stations.
[Item 36]
When the plurality of instructions are executed, further to the user equipment,
Receiving a transmission from the first base station, wherein the transmission includes an Orthogonal Frequency Division Multiplexing (OFDM) frame having a plurality of CRSs, wherein the plurality of CRSs are the physical downlink shared channel (PDSCH) mapping pattern; 33. The one or more computer readable media of item 32, arranged in the orthogonal frequency division multiplexing (OFDM) frame according to:
[Item 37]
The one or more computer readable items of item 32, wherein the plurality of instructions, when executed, further cause the user equipment to store the plurality of common reference signal (CRS) parameters received in a memory of the user equipment. Medium.

Claims (20)

User equipment (UE)
Receiving a plurality of parameter sets from a first transmission point via radio resource control (RRC) signaling, wherein each of the plurality of parameter sets is a common reference signal (CRS) antenna port; A procedure including a number and a CRS frequency shift;
A procedure for detecting a physical downlink control channel (PDCCH) including a 2-bit value indicating one of the individual parameter sets , wherein the PDCCH is a second transmission different from the first transmission point. The procedure received from the point ,
Identifying the individual parameter set indicated by the 2-bit value;
A procedure for decoding a physical downlink shared channel (PDSCH) based on the specified individual parameter set and a program for executing the procedure. To the UE,
Further executing a procedure for determining a PDSCH resource element (RE) mapping pattern based on the identified individual parameter set;
The program according to claim 1, wherein the PDSCH is decoded based on the PDSCH RE mapping pattern. The program according to claim 1 or 2 , wherein the individual parameter set further includes information related to the quantity or location of a plurality of REs dedicated to multicast / broadcast single frequency network (MBSFN) information. The program according to any one of claims 1 to 3, wherein the individual parameter set further includes one or more channel state information reference signal (CSI-RS) parameters. The program according to any one of claims 1 to 4, wherein the plurality of parameter sets are associated with a plurality of different transmission points in a long term evolution (LTE) network. The 2-bit value is included in the downlink control information (DCI) of the PDCCH,
The program according to any one of claims 1 to 5, wherein the PDCCH is detected after the reception of the plurality of parameter sets via the RRC signaling. The computer-readable recording medium which stores the program as described in any one of Claim 1 to 6 . Evolved Node B (eNB)
To indicate individual parameters set from among a plurality of parameter sets which are transmitted to the user equipment (UE) by another eNB, a physical downlink control channel including a 2-bit value (PDCCH) in step of sending to the UE The individual parameter set includes a number of common reference signal (CRS) antenna ports and a CRS frequency shift; and
And a procedure for transmitting a physical downlink shared channel (PDSCH) to the UE based on the indicated individual parameter sets. To cause the eNB to perform a procedure for providing a PDSCH resource element (RE) mapping pattern to the PDSCH according to the indicated individual parameter set to transmit the PDSCH based on the indicated individual parameter set The program according to claim 8 . The program according to claim 8 or 9 , wherein the individual parameter set further includes information related to the quantity or location of a plurality of REs dedicated to multicast / broadcast single frequency network (MBSFN) information. The program according to any one of claims 8 to 10, wherein the individual parameter set further includes one or more channel state information reference signal (CSI-RS) parameters. 12. The program according to any one of claims 8 to 11 , wherein the plurality of parameter sets are associated with a plurality of different transmission points of a long term evolution (LTE) network. The program according to any one of claims 8 to 12, wherein the 2-bit value is transmitted after the transmission of the plurality of parameter sets. Computer readable recording medium storing a program according to any one of claims 8 13. A device used by a user equipment (UE),
The device is
Memory for storing multiple parameter sets;
A mapping circuit coupled to the memory,
Each parameter set of the plurality of parameter sets includes a number of common reference signal (CRS) antenna ports and a CRS frequency shift, wherein the plurality of parameter sets are received from a first transmission point;
The mapping circuit is
A downlink control information (DCI) message including a value indicating a first parameter set of the plurality of parameter sets is received from a second transmission point different from the first transmission point ;
Determining a physical downlink shared channel (PDSCH) resource element (RE) mapping pattern based on the first parameter set indicated by the value;
An apparatus for decoding PDSCH based on the determined PDSCH RE mapping pattern. The plurality of parameter sets includes four parameter sets;
The apparatus of claim 15 , wherein the value is represented by 2 bits. The apparatus according to claim 15 or 16 , wherein the individual parameter set further includes information related to the quantity or location of multiple REs dedicated to multicast / broadcast single frequency network (MBSFN) information. 18. The apparatus according to any one of claims 15 to 17, wherein the individual parameter set further comprises one or more channel state information reference signal (CSI-RS) parameters. The apparatus according to any one of claims 15 to 18, wherein the plurality of parameter sets are associated with a plurality of different transmission points of a long term evolution (LTE) network. The apparatus according to any one of claims 15 to 19 , wherein the apparatus receives the plurality of parameter sets via radio resource control (RRC) signaling.

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