[go: up one dir, main page]

WO2014022773A1 - Signalisation en voie montante pour une communication multipoint coopérative - Google Patents

Signalisation en voie montante pour une communication multipoint coopérative Download PDF

Info

Publication number
WO2014022773A1
WO2014022773A1 PCT/US2013/053424 US2013053424W WO2014022773A1 WO 2014022773 A1 WO2014022773 A1 WO 2014022773A1 US 2013053424 W US2013053424 W US 2013053424W WO 2014022773 A1 WO2014022773 A1 WO 2014022773A1
Authority
WO
WIPO (PCT)
Prior art keywords
base station
cell
srs
transmitting
uplink control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2013/053424
Other languages
English (en)
Inventor
Ralf M. BENDLIN
Anthony Ekpenyong
Runhua Chen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Texas Instruments Japan Ltd
Texas Instruments Inc
Original Assignee
Texas Instruments Japan Ltd
Texas Instruments Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US13/952,588 external-priority patent/US10433159B2/en
Application filed by Texas Instruments Japan Ltd, Texas Instruments Inc filed Critical Texas Instruments Japan Ltd
Priority to CN201380041227.4A priority Critical patent/CN104521156B/zh
Priority to JP2015525623A priority patent/JP6352913B2/ja
Priority to CN201910608365.5A priority patent/CN110350951B/zh
Publication of WO2014022773A1 publication Critical patent/WO2014022773A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/06—TPC algorithms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H04W52/146—Uplink power control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/30—Transmission power control [TPC] using constraints in the total amount of available transmission power
    • H04W52/32—TPC of broadcast or control channels
    • H04W52/325—Power control of control or pilot channels

Definitions

  • the present embodiments relate to wireless communication systems and, more particularly, to uplink signaling of control information in a cooperative multipoint (CoMP) communication system.
  • CoMP cooperative multipoint
  • FIG. 1 shows an exemplary wireless telecommunications network 100.
  • the illustrative telecommunications network includes base stations 101, 102, and 103, though in operation, a telecommunications network necessarily includes many more base stations.
  • Each of base stations 101, 102, and 103 (eNB) is operable over corresponding coverage areas 104, 105, and 106.
  • Each base station's coverage area is further divided into cells. In the illustrated network, each base station's coverage area is divided into three cells.
  • a handset or other user equipment (UE) 109 is shown in cell A 108.
  • Cell A 108 is within coverage area 104 of base station 101.
  • Base station 101 transmits to and receives transmissions from UE 109.
  • UE 109 may be handed over to base station 102. Because UE 109 is synchronized with base station 101, UE 109 can employ non-synchronized random access to initiate a handover to base station 102. UE 109 can also employ non-synchronized random access to request allocation of uplink 11 1 time or frequency or code resources. If UE 109 has data ready for transmission, which may be traffic data, a measurements report, or a tracking area update, UE 109 can transmit a random access signal on uplink 1 1 1. The random access signal notifies base station 101 that UE 109 requires uplink resources to transmit the UE's data. Base station 101 responds by transmitting to UE 109 via downlink 1 10 a message containing the parameters of the resources allocated for the UE
  • UE 109 uplink transmission along with possible timing error correction.
  • UE 109 After receiving the resource allocation and a possible timing advance message transmitted on downlink 1 10 by base station 101, UE 109 optionally adjusts its transmit timing and transmits the data on uplink 11 1 employing the allotted resources during the prescribed time interval.
  • Base station 101 configures UE 109 for periodic uplink sounding reference signal (SRS) transmission.
  • Base station 101 estimates uplink channel quality information (CQI) from the SRS transmission.
  • SRS periodic uplink sounding reference signal
  • Uplink (UL) cooperative multipoint (CoMP) communication requires coordination between multiple network nodes to facilitate improved reception from a UE. This involves efficient resource utilization and avoidance of high inter-cell interference.
  • heterogeneous deployments of small cells that are controlled by low power nodes such as pico eNBs and remote radio heads (RRHs) are deployed within a macro cell such as 108.
  • a UE receives signals from multiple base stations (eNB). These base stations may be macro eNB, pico eNB, femto eNB, or other suitable transmission points (TP).
  • CSI-RS channel state information reference signal
  • Each CSI- RS resource can be associated by the E-UTRAN with a base station, a remote radio head (RRH), or a distributed antenna.
  • the UE subsequently transmits to an eNB by an OFDM frame using allocated physical resource blocks (PRBs) in the uplink (UL).
  • PRBs physical resource blocks
  • FIG. 2 there is a diagram of a heterogeneous wireless communication system of the prior art.
  • the system includes macro cells A and B separated by cell boundary 200.
  • Cell A is controlled by macro eNB 202 and includes a pico cell 204 that is controlled by pico eNB 206.
  • Cell B includes a pico cell 222 that is controlled by pico eNB 228 in communication 226 with pico UE 224.
  • Pico eNB 206 serves UEs such as pico UE 208 within region 204.
  • Pico eNB 206 communicates with pico UE 208 over data and control channels 210.
  • Cell A also includes macro UE 214 which communicates directly with macro eNB 202 over data and control channels 218.
  • pico eNB 206 within macro cell A offers cell or area splitting gain due to the creation of additional cells within the same geographical area.
  • Heterogeneous deployments can be further classified as either shared or unique physical cell identity (PCID) scenarios.
  • PCID physical cell identity
  • both macro eNB 202 and pico eNB 206 share the same PCID. Therefore, DL transmission from both base stations to a UE can be made to appear a single transmission from a distributed antenna system.
  • pico eNB 206 may have a different unique PCID from macro eNB 202. These two scenarios result in different interference environments.
  • Uplink reference signals from a UE to an eNB are used to estimate the uplink channel state information. These reference signals include control channel reference signals (RS), traffic channel demodulation reference signals (DMRS), and sounding reference signals (SRS).
  • RS control channel reference signals
  • DMRS traffic channel demodulation reference signals
  • SRS sounding reference signals
  • the control and traffic channels are known as the Physical Uplink Control Channel (PUCCH) and Physical Uplink Shared Channel (PUSCH), respectively.
  • Orthogonality of a reference signal within a cell is maintained by using different cyclic shifts from a base sequence.
  • Uplink reference signals within the communication system are typically modulated with a constant amplitude zero autocorrelation (CAZAC) sequence or pseudorandom noise (PN) sequence. Different base sequences, however, are not orthogonal and require good network planning to achieve low cross correlation between adjacent cells. Inter-cell interference is mitigated by interference randomization techniques such as cell-specific base sequence hopping and cyclic shift hopping patterns. Moreover, different problems arise depending on
  • inter-cell interference is significantly increased because of short inter-site or inter-point distances.
  • For UL cell selection it is better, in terms of reducing UL interference, for the UE to select the cell with the lowest path loss.
  • macro UE 214 transmits uplink data and control and also receives downlink control information on wireless connection 218 with macro eNB 202.
  • the communication link 212 between macro UE 214 and pico eNB 206 has a shorter path loss compared to communication link 218.
  • macro UE 214 generates significant UL interference 212 to pico eNB 206 while trying to maintain acceptable link quality with macro eNB 202.
  • macro UE 214 When macro UE 214 is near a cell boundary 200, it may also generate significant interference 220 for pico eNB 228.
  • pico eNB 228 For the shared POD scenario, all eNBs within the macro cell effectively form a super-cell comprising a distributed antenna system by virtae of the single PCID. Therefore, there is little to no intra-cell interference since transmitted reference signals are cyclic shifts of the same base sequence.
  • area splitting gain cannot be obtained to take advantage of multiple deployed eNBs in the same geographical area.
  • macro UE 214 may generate unacceptable UL interference to pico eNB 206. Conversely, pico eNB 206 degrades the DL reception of macro UE 214.
  • macro UE 214 it is desirable for macro UE 214 to be configured to transmit to pico eNB 206 to reduce interference and also conserve battery life by lowering its UL transmit power. Therefore, it can be observed that there is a tradeoff between increasing network capacity and mitigating the resulting increase in inter-cell or inter-point interference.
  • a method of operating a wireless communication system includes receiving an identification parameter (ID) from a remote transmitter.
  • ID identification parameter
  • a base sequence index (BSI) and a cyclic shift hopping (CSH) sequence are determined in response to the received ID.
  • a first pseudo-random sequence is determined in response to the BSI.
  • a subsequent pseudorandom sequence is selected in response to the CSH.
  • the method also includes receiving a set of dedicated parameters from a remote transmitter to determine the time/frequency region to transmit uplink control information or a sounding reference signal.
  • Figure 1 is a diagram of a wireless communication system of the prior art
  • Figure 2 is a diagram of a heterogeneous deployment of a wireless communication system of the prior art showing a macro cell and two pico cells;
  • Figure 3 is a diagram of a wireless communication system of the present invention showing a macro cell and a pico cell deployed within the macro cell area with reduced inter-point interference;
  • Figure 4 is a block diagram illustrating logical resource block allocation for a macro cell and a pico cell as in Figure 3;
  • Figure 5 is a flow diagram showing sequence selection for sounding reference signals (SRS) and PUCCH reference signals (RS);
  • Figure 6 is a flow diagram showing determination of PUCCH resource mapping to logical resource block based on cell-specific or UE-specific PUCCH parameters;
  • Figure 7 is a flow diagram of inter-eNB signaling to detemiine a UE-specific configuration of PUCCH and SRS transmission parameters.
  • Inter-channel interference is a significant problem in the uplink control channel of an LTE wireless communication system.
  • CRS Cell-specific Reference Signal
  • CSI-RS Channel State Information Reference Signal
  • DMRS Demodulation Reference Symbol or UE-specific Reference Symbol
  • eNB E-UTRAN Node B or base station
  • EPDCCH Enhanced Physical Downlink Control Channel
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • MIMO Multiple-Input Multiple-Output MRC: Maximum Ratio Combining
  • PCFICH Physical Control Format Indicator Channel
  • PCID Physical Cell Identification
  • PDCCH Physical Downlink Control Channel
  • PDSCH Physical Downlink Shared Channel
  • PRB Physical Resource Block
  • PUCCH Physical Uplink Control Channel
  • PUSCH Physical Uplink Shared Channel
  • RNTI Radio Network Temporary Indicator
  • UpPTS Uplink Pilot Time Slot
  • VCID Virtual Cell Identifier
  • Embodiments of the present invention are directed to enhancing uplink control transmission on the PUCCH and sounding reference signal transmission in a CoMP communication system.
  • the present invention describes methods for partitioning uplink control regions between cells such that inter-cell interference is minimized.
  • a UE close to a cell boundary may generate severe UL interference in an adjacent cell due to transmission of non-orthogonal PUCCH reference signal base sequences in the adjacent cells.
  • the severity of the interference is proportional to the difference in path loss between the UE to intended eNB and the UE to adjacent eNB.
  • path loss is a reduction in pow3 ⁇ 4r density or signal attenuation with electromagnetic wave propagation.
  • pico eNB 206 measures received interference partly due to macro UE 214. If the UL interference is greater than a predetermined threshold, pico eNB 206 informs macro eNB 202 on a backhaul link 216. One logical interface over which such inter-eNB signaling takes place is an X2 interface. Subsequently macro eNB 202 directs macro UE 214 to adopt the PCID of pico cell 206 when initializing the pseudo-random sequence generators for generating the BSI and CSH sequences for PUCCH transmission.
  • the macro UE 214 is now considered a CoMP UE, wherein intra-cell orthogonality between UE 214 and pico UE 208 is achieved and interference 212 ( Figure 2) is eliminated.
  • UE 214 determines its resource block allocation for uplink control transmission based on its serving cell's (macro eNB 202) PUCCH parameters. This may result in PUCCH resource allocation collisions between CoMP UEs and legacy UEs when transmitting channel state information reports, scheduling requests, and HARQ-ACK feedback.
  • One solution to this problem is to partition uplink control transmissions from CoMP UEs and legacy UEs into different RBs. This partitioning must be carefully managed to avoid increasing PUCCH overhead.
  • PUCCH area splitting gain is achieved by configuring UEs to transmit to the closest eNBs.
  • clusters of UEs that are relatively close to each other and spatially isolated from other clusters are assigned a unique ID for initializing a pseudo-random sequence generator for the PUCCH reference signals and sounding reference signals.
  • the new sets created by these UE clusters can be regarded as virtual cells and the dedicated ID is a corresponding virtual cell ID (VCID).
  • Dynamic PUCCH resource allocation is considerably different from semi-static PUCCH resource allocation.
  • dynamic PUCCH resource allocation is determined from DL scheduling assignments sent on the PDCCH or EPDCCH.
  • the present invention utilizes existing parameters from LTE Release 8-10 to calculate a single parameter m to map PUCCH resource blocks (RBs) for both legacy and CoMP UEs.
  • the concept taught by the present invention is a method of configuring UE-specific semi-static and dynamic PUCCH regions, where the former determines the semi-static region for transmitting CSI reports, scheduling requests, and HARQ-ACK feedback due to semi-persistent scheduling, whereas the latter determines the region for dynamic HARQ-ACK feedback.
  • FIG 4 there is a diagram showing logical resource block allocation m for a macro cell and a pico cell as in Figure 3.
  • the parameter m is increasing in the vertical direction as indicated.
  • Figure 4 illustrates the case of resource block (RB) allocation where a macro UE is virtually transferred to a pico eNB.
  • RB resource block
  • By virtual transfer we mean that the macro UE is configured as a CoMP UE to transmit uplink control information to the pico eNB.
  • the logical RB map for the macro UE configuration is shown on the left of Figure 4.
  • Each RB contains a group of PUCCH resources, where the number of resources in a RB depends on the type of PUCCH transmission.
  • Blocks 400 through 406 represent the PUSCH, dynamic PUCCH format la/ lb, semi-static PUCCH region for PUCCH formats 1/la/lb, and semi-static PUCCH region for PUCCH formats 2/2a/2b, respectively.
  • the number of RBs allocated to PUCCH formats 2/2a/2b region is denoted by N ⁇ 2) RB ,m while the starting offset for the dynamic PUCCH region is denoted by
  • the logical RB map for the pico UE configuration is shown on the right with similar definitions for the semi- static and dynamic PUCCH regions.
  • Block 410 represents PUSCH, block 414 the dynamic PUCCH format la/lb region, block 416 the semi-static PUCCH format 1/la/lb region and block 418 the semi-static PUCCH format 2/2a 2b region.
  • LTE Release 8-10 defines the PUCCH resource mapping to resource block m. A UE of these earlier releases determines the starting offset of the dynamic PUCCH region based on the parameters ⁇ 3 ⁇ 4 ⁇ and
  • a CoMP UE in a macro cell can be configured to transmit UL control information in a CoMP dynamic PUCCH region depicted by block 412 of Figure 4.
  • the CoMP uplink control transmission to the pico eNB does not collide with the pico cell's native uplink control uansmissions.
  • the CoMP UE is only provided with a new dedicated dynamic PUCCH offset parameter, denoted as N (i VuccH,uE, it shall use the macro's CSI region parameter ⁇ 3 ⁇ 4 ⁇ , ⁇ as an initial offset as illustrated by the vertical arrow 420.
  • the CoMP UE's dynamic PUCCH transmission may collide with other dynamic PUCCH resources or even PUSCH transmission in the pico cell.
  • both dynamic PUCCH offset and CSI region parameters are provided to the UE.
  • FIG. 5 a flow diagram is shown to illustrate how a UE determines the mapping of a PUCCH resource to a logical resource block.
  • the UE receives an RRC message 500. If one or more dedicated PUCCH parameters from and ( 2) RB JE are detected in message 500, the UE determines the PUCCH resource-to-RB mapping based on the detected parameters 504. Otherwise, if RRC message 500 does not contain one or more dedicated PUCCH mapping parameters, the UE determines the PUCCH resource-to-RB mapping based on the serving cell's common parameters of N ( 1) PUCCH and
  • a UE is configured with a dedicated ID, n ro , that is used for generating both a base sequence index (BSI) and a cyclic shift hopping (CSH) sequence for all PUCCH formats.
  • the UE initializes a pseudo-random sequence generator using either the PCID or nn A binary flag is signaled to the UE to indicate whether the UE applies the PCID of the serving cell or applies the dedicated ID for generating the BSI and CSH sequence.
  • the UE is further configured with dedicated UE- specific parameters to determine the starting offset of the dynamic PUCCH region.
  • FIG. 6 a flow diagram is shown to illustrate how a UE generates the reference signal for PUCCH or SRS transmission.
  • the UE monitors for an RRC message 600.
  • the UE determines in 602 if a detected RRC message contains a dedicated PUCCH or SRS ID, i3 ⁇ 4 D . If n ro is present, the UE initializes the pseudo-random number generators 604 for the base sequence group, sequence and cyclic shift hopping sequence with ⁇ Otherwise, if I3 ⁇ 4D is not detected in an RRC message the UE initializes the pseudo-random sequence generators for the base sequence group, sequence and cyclic shift hopping sequence with the PCID 606 of its serving cell.
  • block 608 determines that PUCCH is to be transmitted the UE selects in block 610 sequence 0 from the PUCCH sequence group and the cyclic shift corresponding to time slot n s . Otherwise if block 608 determines that SRS is to be uansmitted the UE selects in 612 the sequence group and cyclic shift corresponding to the time slot and corresponding SRS SC-FDMA symbol(s) within the time slot. At block 614, the UE generates the appropriate reference signal using the selected sequence.
  • CoMP enhancements can also be extended to SRS uansmissions within a CoMP coordination area.
  • this enables an increase in SRS capacity but at the cost of increased inter-cell interference. Therefore, ensuring sufficient SRS capacity, w r hile maintaining a reasonable SRS overhead per cell, becomes the primary concern as the number of served UEs increases within the CoMP coordination area.
  • Area splitting gain can be achieved by configuring UEs clustered around a reception point with a virtual cell ID for SRS transmission to the desired reception point.
  • the present invention also describes new mechanisms to improve SRS operation in a heterogeneous deployment.
  • An embodiment of the present invention is the configuration of a dedicated UE- specific ID for SRS transmission.
  • the UE determines the base sequence group and sequence hopping patterns from the signaled SRS ID.
  • the UE is further configured with dedicated SRS parameters.
  • a macro UE can be configured with the cell- specific SRS parameters of a pico cell in order to transmit SRS to the pico eNB.
  • the UE can be configured with dedicated parameters for the SRS subframe configuration, the SRS bandwidth configuration, and a parameter for enabling/disabling simultaneous SRS and HARQ-ACK transmission.
  • a UE can further be configured with a parameter defining the maximum uplink pilot time slot (UpPTS) region.
  • UpPTS uplink pilot time slot
  • Both open loop and closed loop UL power control are closely related to CoMP operation. This is because a wireless network may configure one set of transmission points for the DL of a UE and a different set of reception points for the UL of a UE.
  • UE 214 may be configured to send UL transmissions to pico eNB 206 to minimize interference. How r ever, UE 214 may still be configured to receive DL transmissions from macro eNB 202.
  • a problem of power control arises when the path loss between UE 214 and pico eNB 206 is significantly different from the path loss between UE 214 and macro eNB 202.
  • the UE may be UL power controlled such that the reception at the pico eNB is below a desired threshold.
  • the macro eNB 202 may still monitor UL transmissions from UE 214 for radio resource management functions or for use in the DL in TDD systems where channel reciprocity between UL and DL can be exploited. Therefore, a reduction in power to just satisfy a reception threshold at the pico eNB may degrade reception at the macro eNB. This problem typically arises whenever transmission points (TPs) and reception points (RPs) for a UE are not collocated.
  • One solution to the problem is to provide separate power control loops for UL and DL.
  • the first pow r er control loop can be used for PUSCH, PUCCH and SRS transmissions to a nearby eNB.
  • the second power control loop is used to ensure reliable reception at a second eNB with a larger path loss to the UE compared to the first eNB. This, however, creates other problems such as backwards compatibility with legacy systems. For example, a new mechanism is required for the eNB to signal independent transmit power control (TPC) commands to a UE.
  • TPC transmit power control
  • SRS power control for LTE Release 10 is given by equation [1].
  • P CMAX c (i) is the configured maximum transmit power of subframe / ' for serving cell c.
  • m is a trigger type to induce SRS transmission.
  • M SRS c (/) is the bandwidth of the SRS transmission in subframe for serving cell c.
  • the current power control adjustment state of subframe / for serving cell c is f c (i) .
  • P 0 PUSCH c ( j) and c (j) are PUSCH reference power spectral density and fractional power control parameters, respectively, for serving cell c.
  • / indicates the type of PUSCH transmission, namely in response to a semi-persistent, dynamic or random access response grant.
  • PL c is the downlink path loss estimate calculated by the UE for serv ing cell c.
  • the UE is configured by higher layer signaling to transmit aperiodic SRS with offset P SRS OFFSET Q for UL transmission.
  • the UE is configured by higher layer signaling to transmit aperiodic SRS with offset P SR OFFSET (2) for DL transmission.
  • the power control parameters are separately substituted for a single power control parameter and correspond to UL and DL power, respectively.
  • the present invention describes a method of signaling two or more power control commands to a UE.
  • the UE can be configured for aperiodic SRS transmission using dedicated power control commands in a group power control signal that is transmitted on the PDCCH in a downlink control information (DCI) format.
  • DCI downlink control information
  • the UE can be configured by RPvC signaling with the positions of two or more indexes in a bit map containing transmit power control commands to a multiplicity of UEs.
  • One TPC index indicates a TPC command for a first power control loop and the other TPC index indicates a TPC command for a second power control loop.
  • Each TPC index can indicate a 1- or 2-bit TPC command.
  • a 2-bit command is transmitted in DCI format 3 while a 1-bit command is transmitted in DCI format 3 A.
  • the CRC of the DCI format is scrambled by a PUCCH RNTI
  • one TPC index can indicate the TPC command for the PUCCH whereas the other TPC index can indicate a TPC command for aperiodic SRS transmission.
  • a set of one or more indexes can be used to indicate different SRS TPC commands to the UE.
  • Other variations are not precluded, the main idea being that a UE is configured with multiple indexes in a group power control DCI to indicate TPC commands for different power control loops.
  • the prior art for CoMP operation mainly targets scenarios where inter-eNB signaling in a CoMP coordination area takes place over ideal backhaul links characterized by very high throughput and very low latencies on the order of less than 1-2 milliseconds.
  • the embodiments of this present invention are also designed to work in deployments where latencies in inter-eNB signaling are on the order of at least tens of milliseconds.
  • a base station may request over backhaul signaling (using e.g. the X2 signaling protocol) that neighboring base stations transmit their PUCCH configurations.
  • a base station can signal, via the X2 logical interface, the PUCCH configuration of a cell under its control to one or more target cells controlled by other base stations.
  • the dynamic PUCCH offset parameter is indicated in the PUCCH information element signaled on the backhaul link.
  • the number of RBs allocated for transmitting CSI reports can be indicated to allow a neighboring eNB to accurately determine the HARQ-ACK region for a cell controlled by a different eNB.
  • Other parameters may be optionally signaled including the number of PUCCH format 1/la lb resources that can be assigned in one RB, the number of cyclic shifts reserved for transmitting HARQ-ACK, and scheduling requests in a resource block used for mixed transmission of HARQ-ACK scheduling requests and CSI.
  • the PUCCH configuration or some of the elements of this configuration can be signaled by a first base station when requested by a second base station.
  • a first base station may convey to a second base station a preferred PUCCH configuration for a neighboring cell under the control of the second base station.
  • a first base station may indicate via e.g. the X2 interface the SRS subframe configuration and SRS bandwidth configuration of a cell under its control to a second base station that controls a neighboring cell.
  • the second base station may take this information into account when configuring the neighboring cell's cell-specific SRS configuration and also the dedicated SRS configuration for a cell edge UE in that cell.
  • eNB 202 can configure macro cell A with a 5ms periodicity for the cell-specific SRS subframes and a subframe offset of 0.
  • pico eNB 206 can configure the pico cell with the same 5ms periodicity but with a different subframe offset to avoid inter-cell interference.
  • a parameter defining the maximum UpPTS region can be signaled over a backhaul link such as the X2 interface.
  • An eNB 702 controlling a cell serving UE 700 transmits a request for the cell-specific PUCCH and/or SRS configuration of a neighboring cell under the control of eNB 704.
  • the request message 708 is transmitted over a backhaul link using the X2 signaling protocol.
  • the eNB 704 sends a reply message 710 acknowledging the prior request and also transmits the requested PUCCH or SRS configuration over the backhaul link.
  • the eNB 702 makes a decision 712 based on the received information from eNB 704 and on UE measurement report 706 on whether the UE should be configured to transmit PUCCH and/or SRS to eNB 704. If the decision is positive, eNB 702 transmits an RRC configuration message 714 to UE 700 with dedicated PUCCH or SRS parameters that match the PUCCH or SRS configuration of eNB 704. For PUCCH transmission UE 700 determines the RB mapping in 716 and uansmits the required uplink control information on PUCCH 718. For an aperiodic SRS request 720 targeting eNB 704, the UE transmits the SRS 722 to eNB 704.
  • the eNB may alternatively determine in 712 that UE 700 should continue to use the cell-common PUCCH or SRS configuration. In this case blocks 716, 718, 720 and 722 are performed according to the cell-common configuration of eNB 702.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé d'exploitation d'un système de communication sans fil (figure 6). Le procédé comprend la réception d'un paramètre (600) d'identification de cellule virtuelle (VCID) provenant d'un émetteur à distance. Un indice de séquence de base (BSI) et un paramètre (604, 606) de saut de décalage circulaire (CSH) sont déterminés en réponse à la VCID. Une séquence pseudo-aléatoire est sélectionnée en réponse au BSI et au CSH (610, 612). Un signal de référence est généré en utilisant la séquence pseudo-aléatoire sélectionnée (614).
PCT/US2013/053424 2012-08-03 2013-08-02 Signalisation en voie montante pour une communication multipoint coopérative Ceased WO2014022773A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201380041227.4A CN104521156B (zh) 2012-08-03 2013-08-02 用于协作多点通信的上行链路信令
JP2015525623A JP6352913B2 (ja) 2012-08-03 2013-08-02 協調多地点通信のためのアップリンクシグナリング
CN201910608365.5A CN110350951B (zh) 2012-08-03 2013-08-02 用于协作多点通信的上行链路信令

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US201261679400P 2012-08-03 2012-08-03
US61/679,400 2012-08-03
US13/952,588 US10433159B2 (en) 2012-08-03 2013-07-27 Uplink signaling for cooperative multipoint communication
US13/952,588 2013-07-27

Publications (1)

Publication Number Publication Date
WO2014022773A1 true WO2014022773A1 (fr) 2014-02-06

Family

ID=50028565

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2013/053424 Ceased WO2014022773A1 (fr) 2012-08-03 2013-08-02 Signalisation en voie montante pour une communication multipoint coopérative

Country Status (3)

Country Link
JP (3) JP6352913B2 (fr)
CN (2) CN104521156B (fr)
WO (1) WO2014022773A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105260322A (zh) * 2014-06-30 2016-01-20 中兴通讯股份有限公司 一种对循环缓冲区消除循环移位的方法和装置
JP2017516374A (ja) * 2014-04-07 2017-06-15 ホアウェイ・テクノロジーズ・カンパニー・リミテッド 不連続送信および測定のためのシステムおよび方法
CN107534889A (zh) * 2015-05-14 2018-01-02 株式会社Ntt都科摩 用户终端、无线基站以及无线通信方法
CN107889256A (zh) * 2016-09-30 2018-04-06 北京信威通信技术股份有限公司 一种调度上行资源的方法及装置
US10680866B2 (en) 2017-03-24 2020-06-09 Huawei Technologies Co., Ltd. Sounding reference signal design
JP2022141780A (ja) * 2014-08-06 2022-09-29 三菱電機株式会社 移動体通信システム、通信端末および基地局

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3061256B2 (ja) 1995-08-19 2000-07-10 泰夫 仲野 伸縮テープ用フィーダー
JP6100732B2 (ja) * 2014-05-16 2017-03-22 Ｎｅｃプラットフォームズ株式会社 基地局
CN106304206A (zh) * 2015-05-15 2017-01-04 中兴通讯股份有限公司 一种虚拟小区动态的控制面信令的传递方法及系统
WO2017054986A1 (fr) * 2015-09-28 2017-04-06 British Telecommunications Public Limited Company Réseau cellulaire de télécommunications
JP6897815B2 (ja) * 2015-12-31 2021-07-07 日本電気株式会社 Ｕｅ及びｕｅによって行われる方法
EP3381233B1 (fr) 2015-12-31 2020-09-09 Nec Corporation Procédés et appareils pour émettre et recevoir des informations de liaison montante
US10367616B2 (en) * 2016-04-04 2019-07-30 Qualcomm Incorporated Dynamic sounding reference signal scheduling
KR20220042244A (ko) * 2017-08-02 2022-04-04 애플 인크. Nr pucch에 대한 시퀀스 설계 및 자원 할당
CN107846733B (zh) * 2017-12-20 2020-02-21 中国人民解放军国防科技大学 高密度物联网中的分布式信道分配方法
CN110278062B (zh) * 2018-03-14 2021-03-09 电信科学技术研究院有限公司 资源指示、确定方法及装置
US20220216968A1 (en) * 2018-08-17 2022-07-07 Lenovo (Beijing) Limited Srs configurations and srs transmission
CN111262663B (zh) 2019-04-30 2021-08-31 维沃移动通信有限公司 一种反馈消息的发送方法及终端设备
EP3829076A3 (fr) * 2019-11-28 2021-08-04 Samsung Electronics Co., Ltd. Commande de puissance de transmission de signaux de référence de sondage dans un système et dispositif de communication sans fil
JP7290188B2 (ja) * 2020-02-07 2023-06-13 日本電気株式会社 基地局によって行われる方法、ｕｅによって行われる方法、基地局及びｕｅ

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090147865A1 (en) * 2007-12-07 2009-06-11 Jianzhong Zhang Uplink feedback for supporting MIMO operation in the LTE downlink
WO2011046353A2 (fr) * 2009-10-13 2011-04-21 Pantech Co.,Ltd. Procédé d'envoi des informations spécifiques d'une cellule de station de base dans un système d'émission/réception coordonnée multipoint
US20110171964A1 (en) * 2010-01-08 2011-07-14 Mediatek Inc. Resource allocation and signaling method for LTE sounding
WO2011105845A2 (fr) * 2010-02-25 2011-09-01 엘지전자 주식회사 Procédé de transmission d'informations de commande dans un système de communication sans fil à porteuses multiples
US20120044906A1 (en) * 2010-06-18 2012-02-23 Mediatek Inc. Sounding mechanism and configuration under carrier aggregation

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101103605B1 (ko) * 2007-04-30 2012-01-09 노키아 지멘스 네트웍스 오와이 자도프-추, 수정된 자도프-추, 및 블록-방식 확산 시퀀스들에 대한 조정된 순환 시프트 및 시퀀스 호핑
US20090046645A1 (en) * 2007-08-13 2009-02-19 Pierre Bertrand Uplink Reference Signal Sequence Assignments in Wireless Networks
KR101368494B1 (ko) * 2008-04-21 2014-02-28 엘지전자 주식회사 무선 통신 시스템에서 제어신호 전송 방법
CN101777940B (zh) * 2009-01-12 2013-08-14 华为技术有限公司 上行信息的传输方法、装置及系统
US8867414B2 (en) * 2009-04-27 2014-10-21 Qualcomm Incorporated Method and apparatus for interaction of cell-specific and user-equipment-specific sounding reference signal periodicity and offset
CN101621813B (zh) * 2009-07-23 2011-12-14 北京航空航天大学 一种面向下行相干协作多点传输的上行信道估计方法
US9014138B2 (en) * 2009-08-07 2015-04-21 Blackberry Limited System and method for a virtual carrier for multi-carrier and coordinated multi-point network operation
CN102026298B (zh) * 2009-09-22 2014-04-30 中兴通讯股份有限公司 消除多点协作中不同小区用户间srs干扰的方法与系统
EP2421178B1 (fr) * 2009-12-07 2020-02-05 LG Electronics Inc. Procédé de transmission d'un signal de référence de sondage dans un système de communication comp en liaison montante, et appareil correspondant
KR101657125B1 (ko) * 2009-12-10 2016-09-13 엘지전자 주식회사 무선 통신 시스템에서 셀간 간섭을 저감하는 방법 및 장치
CN102065557B (zh) * 2010-12-31 2016-03-30 中兴通讯股份有限公司 用于协作多点传输系统的测量参考信号发送方法及系统
KR101880460B1 (ko) * 2011-01-10 2018-07-20 엘지전자 주식회사 무선통신 시스템에서의 제어정보의 전송 방법 및 장치
KR101777424B1 (ko) * 2011-01-19 2017-09-12 엘지전자 주식회사 다중 노드 시스템에서 신호 수신 방법 및 장치

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090147865A1 (en) * 2007-12-07 2009-06-11 Jianzhong Zhang Uplink feedback for supporting MIMO operation in the LTE downlink
WO2011046353A2 (fr) * 2009-10-13 2011-04-21 Pantech Co.,Ltd. Procédé d'envoi des informations spécifiques d'une cellule de station de base dans un système d'émission/réception coordonnée multipoint
US20110171964A1 (en) * 2010-01-08 2011-07-14 Mediatek Inc. Resource allocation and signaling method for LTE sounding
WO2011105845A2 (fr) * 2010-02-25 2011-09-01 엘지전자 주식회사 Procédé de transmission d'informations de commande dans un système de communication sans fil à porteuses multiples
US20120044906A1 (en) * 2010-06-18 2012-02-23 Mediatek Inc. Sounding mechanism and configuration under carrier aggregation

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017516374A (ja) * 2014-04-07 2017-06-15 ホアウェイ・テクノロジーズ・カンパニー・リミテッド 不連続送信および測定のためのシステムおよび方法
CN105260322A (zh) * 2014-06-30 2016-01-20 中兴通讯股份有限公司 一种对循环缓冲区消除循环移位的方法和装置
JP2022141780A (ja) * 2014-08-06 2022-09-29 三菱電機株式会社 移動体通信システム、通信端末および基地局
US12309679B2 (en) 2014-08-06 2025-05-20 Mitsubishi Electric Corporation Communication system
CN107534889A (zh) * 2015-05-14 2018-01-02 株式会社Ntt都科摩 用户终端、无线基站以及无线通信方法
CN107889256A (zh) * 2016-09-30 2018-04-06 北京信威通信技术股份有限公司 一种调度上行资源的方法及装置
US10680866B2 (en) 2017-03-24 2020-06-09 Huawei Technologies Co., Ltd. Sounding reference signal design
US10938611B2 (en) 2017-03-24 2021-03-02 Huawei Technologies Co., Ltd. Sounding reference signal design
US11296916B2 (en) 2017-03-24 2022-04-05 Huawei Technologies Co., Ltd. Sounding reference signal design

Also Published As

Publication number Publication date
JP2020039152A (ja) 2020-03-12
CN104521156B (zh) 2019-07-30
JP2018164279A (ja) 2018-10-18
CN110350951A (zh) 2019-10-18
CN110350951B (zh) 2023-11-24
JP6352913B2 (ja) 2018-07-04
JP6616455B2 (ja) 2019-12-04
JP2015527845A (ja) 2015-09-17
CN104521156A (zh) 2015-04-15
JP7116274B2 (ja) 2022-08-10

Similar Documents

Publication Publication Date Title
US20230179993A1 (en) Uplink signaling for cooperative multipoint communication
JP7116274B2 (ja) 協調多地点通信のためのアップリンクシグナリング
US10193669B2 (en) NIB CoMP transmission method and device in wireless communication system
US10499385B2 (en) Method and apparatus for transmitting/receiving downlink signal considering antenna port relationship in wireless communication system
US10027384B2 (en) Method and device for performing NIB comp transmission in wireless communication system
US10104653B2 (en) Method and apparatus for transreceiving downlink signal by considering antenna port relationship in wireless communication system
US9392552B2 (en) Controlling transmit power of uplink sounding reference signal
US9264195B2 (en) Downlink signal transceiving method and device, in wireless communication system, taking into account antenna port relationship
US9888493B2 (en) Multi-point coordination method for receiving uplink data in wireless communication system and apparatus performing same
CN106664729B (zh) 在支持载波聚合的无线通信系统中通过用户设备将信号发送到enb以及从enb接收信号的方法和设备
EP2874335B1 (fr) Procédé et dispositif pour transmettre des données d'état de canal dans un système de communication sans fil
US9813216B2 (en) Method for reporting channel state information having interference cancellation capability reflected therein, and apparatus therefor
WO2022126149A2 (fr) Système et procédé pour établir des communications à l'aide de points d'émission-réception multiples intercellulaires et intracellulaires
KR102091607B1 (ko) 상향링크 신호 전송 및 수신 방법, 및 이들을 위한 장치
WO2015016575A1 (fr) Procédé et dispositif pour réaliser une transmission multipoint coordonnée sur la base de la sélection d'un point de transmission
WO2014182041A1 (fr) Procédé d'exécution d'une mesure dans un système de communication sans fil et appareil associé
KR20120121299A (ko) 기지국의 상향링크 전력 제어 정보 제공 방법 및 단말의 상향링크 전력 제어 방법, 그 기지국, 그 단말
KR20130050267A (ko) 협력형 다중 포인트 통신시스템에서 단말의 상향링크 전력 제어 방법 및 송수신 포인트의 상향링크 통신방법, 그 송수신 포인트, 그 단말
KR20130127036A (ko) 비주기적 사운딩 참조신호 제어방법 및 그 장치

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 13825516

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2015525623

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 13825516

Country of ref document: EP

Kind code of ref document: A1