CN104521156B - Uplink signalling for cooperative multi-point communication - Google Patents
Uplink signalling for cooperative multi-point communication Download PDFInfo
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- CN104521156B CN104521156B CN201380041227.4A CN201380041227A CN104521156B CN 104521156 B CN104521156 B CN 104521156B CN 201380041227 A CN201380041227 A CN 201380041227A CN 104521156 B CN104521156 B CN 104521156B
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- 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
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- 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
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- 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
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- 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
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Abstract
A kind of method (Fig. 6) operating wireless communication system is disclosed.This method includes receiving virtual subdistrict mark (VCID) parameter (600) from distance transmitter.In response to VCID, motif column index (BSI) and cyclic shift jump (CSH) parameter (604,606) are determined.In response to BSI and CSH selection pseudo-random sequence (610,612).Reference signal (614) are generated using selected pseudo-random sequence.
Description
Technical field
The present invention relates to wireless communication systems, and more particularly, to the control in cooperative multi-point (CoMP) communication system
The uplink signalling of information processed.
Background technique
Conventional cellular communication system is run in a manner of point-to-point single cell transmission, and wherein user terminal or equipment (UE) are being given
Single cellular base station (eNB or eNodeB) is uniquely connected on fixing time and by its service.The example of this system is 3GPP
Long term evolution (LTE version 8).Advanced cellular system be intended to by using it is how point-to-point or collaboration multiple spot (CoMP) communication come into
One step improves data transfer rate and performance, plurality of base station can collaboratively design downlink transmission with and meanwhile service UE.It is this
The example of system is 3GPP LTE advanced system (version 10 and after).This passes through from the identical signal of different Base Transmitters to each
UE greatly improves the received signal intensity at UE.This is for observing the strongly disturbing cell edge from adjacent base station
UE is particularly advantageous.Using CoMP, the interference from adjacent base station becomes useful signal, also, therefore, significantly improves reception matter
Amount.Therefore, if multiple cell cooperative work nearby, the UE in CoMP communication mode will obtain much better service.
Fig. 1 shows exemplary wireless communications network 100.Exemplary telecommunication network includes base station 101,102 and 103, although
At runtime, telecommunication network must include more base stations.Each of base station 101,102 and 103 (eNB) is in respective coverage areas domain
104, it can operate on 105 and 106.The overlay area of each base station is further divided into cell.In the network illustrated by, often
The overlay area of a base station is divided into three cells.Mobile phone or other user equipmenies (UE) 109 are illustrated in cell A 108
In.Cell A108 is in the overlay area 104 of base station 101.Base station 101 emits signal and receive from UE 109 to UE 109 to be passed
It is defeated.Enter cell B 107 as UE 109 removes cell A 108, UE 109 can be switched to base station 102.Because of UE
109 is synchronous with base station 101, and UE 109 can use non-synchronized random access to start to the switching of base station 102.UE 109 can also
Enough use non-synchronized random access to request distribution 111 time of uplink or frequency or code resource.If UE 109 has
The data of transmission are got out, which can be business datum, measurement report or tracking area update, then UE 109 can be upper
Random access signal transmission on line link 111.Accidental access signal notifies UE 109 that uplink resource is required to send out to base station 101
Penetrate the data of UE.Base station 101 comprising distribution to the transmitting of UE 109 via downlink 110 for 109 uplink of UE by passing
The parameter of defeated resource and the message of possible time order error correction are responded.Base station 101 is being received in downlink
After the resource allocation and possible timing emitted on 110 shifts to an earlier date message, UE 109 optionally adjusts it and emits timing and pre-
The distributed resource of interim use of fixing time emits data in uplink 111.Base station 101 configures UE 109 to be used for
Periodic uplink value detects reference signal (SRS) transmission.Believed according to SRS transmission estimating uplink channel quality base station 101
It ceases (CQI).
Collaboration between the multiple network nodes of uplink (UL) cooperative multi-point (CoMP) communicating requirement, to help improve UE
Reception.This is related to the effective utilization of resources and is avoided high inter-cell interference.Specifically, (such as pico- by low power nodes
(pico) eNB and remote radio head (RRH)) the isomery deployment of small cell of control is deployed in macrocell (such as 108).
In multiple spot (CoMP) wireless communication system of collaboration, UE receives signal from multiple base stations (eNB).These base stations can be macro
ENB, pico- eNB, femto eNB or other suitable transfer points (TP).For each UE, which UE is downlink can be measured based on
Downlink channel state information configures multiple channel state information reference signal (CSI-RS) resources.Each CSI-RS resource can
It is associated with by E-UTRAN with base station, remote radio head (RRH) or spaced antenna.UE then makes on uplink (UL)
Emitted by OFDM frame to eNB with the Physical Resource Block (PRB) of distribution.
Referring now to Fig. 2, the block diagram of the heterogeneous wireless communication system of the prior art is provided.The system includes by cell boarder
200 separated macrocell A and B.Cell A is controlled by macro eNB 202 and the picocell 204 including being controlled by pico- eNB 206.
Cell B includes the picocell 222 controlled by the pico- eNB 228 for communicating 226 with pico- UE 224.Pico- eNB 206 is to area
UE (such as pico- UE 208) in domain 204 provides service.Pico- eNB 206 passes through data and control channel 210 and pico- UE
208 communications.Cell A further includes macro UE 214, passes through data and control channel 218 and macro 202 direct communication of eNB.Macro small
Pico- eNB 206 is introduced in area A to provide due to establishing cell caused by additional cell or region point in same geographic area
Split gain.Isomery deployment can further be classified into shared or unique physical cell ID (PCID) situation.Reference Fig. 2,
Under shared PCID situation, both macro eNB 202 and pico- eNB 206 share same PCID.Therefore, can make from two base stations
DL transmission to UE looks like the single transmission from distributing antenna system.Alternatively, pico- eNB 206 can have with
Macro eNB 202 different unique PCID.Both of these case causes different interference environments.
Uplink reference signal from UE to eNB is used for estimating uplink channel state information.These benchmark letter
It number include control channel reference signal (RS), Traffic Channel demodulation reference signal (DMRS) and value detects reference signal (SRS).?
In LTE, control channel and Traffic Channel are hereinafter referred to as physical uplink control channel (PUCCH) and physical uplink link is total
Enjoy channel (PUSCH).The orthogonality of the reference signal in cell is maintained by using the different cyclic shifts from basic sequence.
Usually utilize the uplink in uniform amplitude zero auto-correlation (CAZAC) sequence or pseudo noise (PN) sequence modulation communication system
Link reference signal.However, different basic sequences are not the network plannings that is orthogonal and having required to realize between neighboring community
Low cross-correlation.Subtracted by interference randomization technology (the specific basic sequence jump of such as cell and cyclic shift Hopping Pattern)
Light inter-cell interference.Moreover, according to whole cells in CoMP communication system all have unique Cell ID still share it is same small
There are different problems in area ID.
In the heterogeneous wireless communication system of the prior art, inter-cell interference due between short website or point between distance and show
It writes and increases.UL cell is selected, in terms of reducing UL interference, UE is preferably selected the cell with lowest path loss.For example,
Macro UE 214 in the wireless connection 218 of macro eNB 202 emit uplink data and control and also reception downlink
Control information.However, the communication link 212 between macro UE 214 and pico- eNB 206 has more compared with communication link 218
Few path loss.Thus, when attempting to maintain 202 acceptable link-quality of eNB, macro UE 214 produces pico- eNB 206
Raw significant UL interference 212.When macro UE 214 is close to cell boarder 200, can also generate to the significant dry of pico- eNB 228
It disturbs.The case where for shared PCID, whole eNB in macrocell are effectively formed by single PCID including spaced antenna system
The super cell of system.Accordingly, there exist it is few or do not have inter-cell interference because transmitting reference signal be identical basic sequence
Cyclic shift.On the other hand, regional split gain can not be obtained, to utilize multiple deployment in same geographic area
eNB.The case where for unique PCID, macro UE 214 can generate unacceptable UL to pico- eNB 206 and interfere.On the contrary, micro-
Micro- eNB 206 makes the DL of macro UE 214 receive deterioration.Therefore, it is desirable to macro UE 214 be configured as to pico- eNB 206 emit with
It reduces and interferes and also save battery life by reducing its UL transmission power.Therefore, it is able to observe that and is increasing network appearance
There is compromise between the increase interfered between minizone or point caused by amount and mitigation.
Although believing above method provides improving stablizing for wireless communication present inventors appreciate that controlling UL
The further improvement of the transmission of breath is still possible.Therefore, preferred embodiments described below is intended to this point and right
The improvement of the prior art.
Summary of the invention
In a preferred embodiment of the invention, a kind of method operating wireless communication system is disclosed, this method comprises: from
Distance transmitter receives identification parameter (ID).In response to received ID, motif column index (BSI) and cyclic shift jump are determined
(CSH) sequence.In response to BSI, the first pseudo-random sequence is determined.In response to CSH, subsequent pseudo-random sequence is selected.This method
It further include that special parameters set is received from distance transmitter to determine for transmitting uplink control information or detection benchmark letter
Number time/frequency region.
Detailed description of the invention
Fig. 1 is the block diagram of the wireless communication system of the prior art；
Fig. 2 is the block diagram of the isomery deployment of the wireless communication system of the prior art, shows macrocell and two pico- small
Area；
Fig. 3 is the block diagram of wireless communication system of the invention, is shown with the macrocell and portion interfered between reduced point
Affix one's name to the picocell in macrocell area；
Fig. 4 is the block diagram of the logical resource block distribution of the macrocell and picocell illustrated as in Fig. 3；
Fig. 5 shows the flow chart of the sequence selection of value detects reference signal (SRS) and PUCCH reference signal (RS)；
Fig. 6 shows that specific based on cell or the specific PUCCH parameter of UE determines the mapping of PUCCH resource to logical resource block
Flow chart；And
Fig. 7 is the flow chart of signaling between the eNB that the UE of determining PUCCH and SRS transmission parameter is specifically configured.
Specific embodiment
In the uplink control channel of LTE wireless communication system, interchannel interference is a prominent question.
Following abbreviation uses in entire instructions book.
BLER: block error rate
BSI: motif column index
CQI: channel quality indicator
CRS: the specific reference signal of cell
CRC: cyclic redundancy check
CSH: cyclic shift jump
CSI: channel state information
CSI-RS: channel state information reference signal
DCI: downlink control instructions symbol
DL: downlink
DMRS: demodulation fiducial mark or the specific fiducial mark of UE
DPS: dynamic point selection
ENB:E-UTRAN node B or base station
EPDCCH: enhancing physical downlink control channel
E-UTRAN: the Universal Terrestrial Radio Access Network of evolution
HARQ-ACK: hybrid automatic repeat-request-confirmation
IRC: interference rejection combination
JT: joint transmission
LTE: long term evolution
MIMO: multiple-input and multiple-output
MRC: the largest proportion of combinations
PCFICH: physical control format indicator channel
PCID: Physical Cell Identifier
PDCCH: physical downlink control channel
PDSCH: physical down link sharing channel
PMI: precoding matrix indicators
PRB: Physical Resource Block
PUCCH: physical uplink control channel
PUSCH: physical uplink shared channel
QAM: quadrature amplitude modulation
RI: order designator
RNTI: the interim indicator of radio net
RRC: radio resource control
SNR: signal-to-noise ratio
SRS: value detects reference signal
TPC: transmission power control
UE: user equipment
UL: uplink
UpPTS: uplink pilot time slot
VCID: virtual subdistrict identifier
Embodiments of the present invention are intended to enhance the spy in the uplink control transmissions and CoMP communication system on PUCCH
Survey reference signal transmission.It is dry that present invention description minimizes minizone for the uplink control region between division of cells
The method disturbed.Due to the transmission of PUCCH reference signal basic sequence nonopiate in neighboring community, the UE close to cell boarder can be in phase
Generate serious UL interference in adjacent cell, the seriousness of interference and UE to desired eNB and UE to the path loss between adjacent eNB
Difference it is proportional.Here, the reduction of power density or signal decaying when path loss is Electromagnetic Wave Propagation.Referring to Fig. 3, according to this
One embodiment of invention, in the case where each cell has unique physical cell ID, the pico- measurement of eNB 206 is received
Interference (partially due to macro UE 214 causes).If UL interference is greater than predetermined threshold, pico- eNB 206 notifies backhaul link
Macro eNB 202 on 216.A kind of logic interfacing that signaling between this eNB occurs on it is X2 interface.Then, macro eNB 202
When initializing pseudo random sequence generator is to generate BSI the and CSH sequence for PUCCH transmission, command macro UE 214 is used
The PCID of picocell 206.Macro UE 214 is presently considered to be CoMP UE, wherein realize UE 214 and pico- UE 208 it
Between intra-cell orthogonality, and eliminate interference 212 (Fig. 2).However, a problem of this method is UE 214 based on its clothes
The PUCCH parameter of the cell (macro eNB 202) of business come determine for uplink control transmissions resource block distribution.This will lead to
PUCCH money in launch channel status information reporting, scheduling request and HARQ-ACK feedback, between CoMP UE and old UE
Source distribution conflict.One solution of this problem is will to divide from the uplink control transmissions of CoMP UE and old UE
At different RB.The segmentation must carefully manage to increase PUCCH expense.
In an alternative embodiment of the invention, wherein whole cells in CoMP coordinated groups share public PCID,
By configuring UE to realize PUCCH regional split gain to nearest eNB transmitting.Here, interference and region between increasing point
There is compromise between PUCCH capacity.According to the present embodiment, the UE cluster for being relatively near to each other and being spatially isolated with other clusters
It is assigned unique ID, which is used to initialize for the pseudo-random sequence of PUCCH reference signal and value detects reference signal hair
Raw device.Virtual subdistrict can be referred to as by the new set of these UE clusters creation and dedicated ID is corresponding virtual subdistrict ID
(VCID)。
Other exemplary applications of this virtual subdistrict concept are possible.Referring to Fig. 3, the following institute of an alternative embodiment
It states.ENB 202 configures macrocell A to PCID=123, and pico- eNB 206 configures its picocell to PCID
=231, and pico- eNB 228 configures its picocell to PCID=55.It is completely new under the control of eNB 202
Virtual subdistrict can be by configuring UE 214 to VCID nID=500 create.
Dynamic PUCCH resource distribution with semi-static PUCCH resource distribution quite difference.Here, according in PDCCH or
The DL scheduling assignment sent on EPDCCH come determine dynamic PUCCH resource distribute.The present invention is utilized from LTE version 8-10
There is parameter to calculate single parameter m to map the PUCCH resource block (RB) of both old UE and CoMP UE.Present invention teach that
Concept is to configure the specific semi-static and region dynamic PUCCH the method for UE, and wherein the former determines for emitting CSI report, adjusting
The semi-static region of degree request and the feedback of the HARQ-ACK as caused by semi-continuous scheduling, and the latter determines and is used for dynamic HARQ-
The region of ACK feedback.
It referring now to Fig. 4, is shown for as the logical resource block of macrocell and picocell in Fig. 3 distributes m
Block diagram.Parameter m increases in indicated vertical direction.Fig. 4 illustrates the case where resource block (RB) distribution, wherein macro UE is empty
It is quasi- to be transmitted to pico- eNB.Virtual transmission refers to that macro UE is configured to CoMP UE, to believe to pico- eNB transmitting uplink control
Breath.The logic RB mapping of macro UE configuration is shown on the left of Fig. 4.Each RB includes PUCCH resource group, wherein the number of resources in RB
Amount depends on the transport-type of PUCCH.Block 400 to 406 respectively indicates PUSCH, dynamic PUCCH format 1a/1b, PUCCH format
The semi-static region PUCCH of 1/1a/1b and the semi-static region PUCCH of PUCCH format 2/2a/2b.It is assigned to PUCCH format
The quantity of the RB in the region 2/2a/2b is by N(2) RB, mIt indicates, and the start offset in the region dynamic PUCCH is by N(1) PUCCH, mIt indicates.Slightly
The logic RB of UE configuration is mapped in right side and shows, wherein semi-static have similar definition with the region dynamic PUCCH.Block 410 indicates
PUSCH, block 414 indicate the region dynamic PUCCH format 1a/1b, block 416 indicate the region semi-static PUCCH format 1/1a/1b and
Block 418 indicates the region semi-static PUCCH format 2/2a/2b.LTE version 8-10 is defined into the PUCCH resource mapping of resource block m.
The UE of these Versions is based on parameter N(2) RBAnd N(1) PUCCHDetermine the start offset in the region dynamic PUCCH.
CoMP UE in macrocell can be configured to send out in the region CoMP dynamic PUCCH that the block 412 of Fig. 4 is described
Penetrate UL control information.Therefore, to the CoMP uplink control transmissions of pico- eNB not with the intrinsic uplink control of picocell
Transmission collision processed.However, if CoMP UE, which is only provided to have, is expressed as N(1) PUCCH, UENew dedicated dynamic PUCCH offset
Parameter, then as shown in vertical arrows 420, it should use macro CSI region parameter N(2) RB, mAs initial offset.In this situation
Under, the dynamic PUCCH transmissions of CoMP UE can be with the dynamic PUCCH resource of other in picocell or even PUSCH transmission is rushed
It is prominent.If mixing RB to exist, it may also clash again, one of RB includes both HARQ-ACK feedback and CSI report
PUCCH resource.Therefore, embodiment according to the present invention, dynamic PUCCH offset and CSI region parameter are both provided
To UE.
Referring now to Fig. 5, the flow chart how UE determines the mapping of PUCCH resource to logical resource block is shown.UE is received
RRC information 500.If detecting N in message 500(1) PUCCH, UEAnd N(2) RB, UEOne or more dedicated PUCCH ginseng
Number, then UE determines PUCCH resource to RB mapping 504 based on the parameter detected.Otherwise, if RRC information 500 does not include one
Or more dedicated PUCCH mapping parameters, then common parameter N of the UE based on serving cell(1) PUCCHAnd N(2) RBDetermine PUCCH
Resource is mapped to RB, as shown in 506.
In yet another embodiment of the present invention, dedicated ID, n are utilizedIDUE is configured, the dedicated ID is for generating whole
The motif column index (BSI) and cyclic shift of PUCCH format jump (CSH) sequence.UE uses PCID or nIDInitialization it is pseudo- with
Machine sequencer.Binary flags signal is sent to indicate that the PCID of UE application service cell is still answered with signal form to UE
BSI and CSH sequence is generated with dedicated ID.UE has been further configured the specific parameter N of UE(1) PUCCH, UEAnd N(2) RB, UE, with determination
The start offset in the region dynamic PUCCH.
Referring now to Fig. 6, the flow chart for the reference signal how UE generates for PUCCH or SRS transmission is shown.UE prison
Survey RRC information 600.The RRC information that UE is confirmly detected in 602 includes dedicated PUCCH or SRS ID, nID.If there is
nID, then UE utilizes nIDInitialization is used for the pseudorandom number generator 604 of basic sequence group, sequence and cyclic shift hopping sequences.It is no
Then, if not detecting n in RRC informationID, then UE utilizes the PCID 606 of its serving cell to initialize for basic sequence
The pseudo-random sequence generator of group, sequence and cyclic shift hopping sequences.If fruit block 608 determines that PUCCH will be launched, then exist
In block 610, UE sequence 0 of the selection from PUCCH sequence group and correspond to time slot nSCyclic shift.Otherwise, as fruit block 608 is true
Determining SRS will be launched, then UE selects the correspondence in sequence group and the cyclic shift corresponding to the time slot and the time slot in 612
SRS SC-FDMA symbol (one or more).In block 614, UE generates suitable reference signal using selected sequence.
CoMP enhancing can also expand to the SRS transmission in CoMP Cooperative Area.For sharing PCID situation, this makes
SRS capacity can increase but be using increased inter-cell interference as cost.Therefore, with the service in CoMP Cooperative Area
The quantity of UE increases, it is ensured that sufficient SRS capacity simultaneously maintains the reasonable SRS overhead of each cell to become main problem.Pass through
It will be configured to can be realized with the virtual subdistrict ID for the SRS transmission for being used to it is expected receiving point around the UE of receiving point aggregation
Regional split gain.It is used to improve different invention further describes a kind of new mechanism for the VCID of SRS transmission due to introducing
SRS operation in structure deployment.A kind of situation is that more UE are transferred to macro eNB compared with pico- eNB.Therefore, in macrocell and
Using the specific SRS subframe configuration of identical cell on picocell, due to PUSCH rate in the specific SRS subframe of cell
Match, partially sacrifices the PUSCH transmission efficiency in picocell.It is different but relevant for the data and control of decoupling
Problem occurs, and wherein UE receives PDCCH from an eNB but emits PUSCH to different eNB.Thus, if two cells it
Between SRS subframe configure it is different, then it needs to be determined that UE should be using which of these configurations.
An embodiment of the invention is the specific ID of dedicated UE for being configured to SRS transmission.UE is according to signal shape
The SRS ID that formula is sent determines basic sequence group and sequence jump mode.
Another embodiment of the invention is further to utilize dedicated SRS parameter configuration UE.For example, can be using slightly
The specific macro UE of SRS parameter configuration of the cell of cell, to emit SRS to pico- eNB.Special parameters can be utilized and for making
The parameter configuration UE of energy/disabling SRS and HARQ-ACK transmission simultaneously, wherein special parameters are for SRS subframe configuration, SRS bandwidth
Configuration.For TDD system, the parameter configuration for defining the region maximum uplink pilot time slot (UpPTS) can be further utilized
UE。
Both open loop and closed-loop UL power control are closely related with CoMP operation.This is because wireless network can configure use
In a different reception point set of transmission a point set and the UL for UE of the DL of UE.Referring back to Fig. 3, for example,
UE 214 may be configured to send UL transmission to pico- eNB 206 so that minimum interference.However, UE 214 can still be matched
It is set to from macro eNB 202 and receives DL transmission.When the path loss and UE 214 and macro eNB between UE 214 and pico- eNB 206
When path loss between 202 is significantly different, occur power control the problem of.UE can be by UL power control, so that pico- eNB
The reception at place is lower than expectation threshold value.However, macro eNB 202 can still monitor the transmission of the UL from UE 214, to be used for radio
Resource management function or for being used in the DL of TDD system, wherein in a tdd system, the letter between UL and DL can be developed
Road reciprocity (reciprocity).Therefore, the power reduction for only meeting the reception threshold value at pico- eNB can make HongeNBChu's
Receive deterioration.Under normal conditions, in the transfer point of UE (TP) and receiving point (RP) not juxtaposition, this problem occurs.The problem
A solution be to provide the independent power control circuit for UL and DL.First power control circuit can be used in attached
PUSCH, PUCCH and SRS transmission of nearly eNB.Second power control circuit for ensure with the first eNB compared with biggish
Reliable reception at the 2nd eNB of the path loss of UE.However, this generates other problems, such as with it is old systematic reversed
It is compatible.It is ordered for example, needing a kind of new mechanism to send independent transmission power control (TPC) to UE with signal form eNB.
SRS power control for LTE version 10 is provided by formula [1].
Here, PCMAX, c(i) be serving cell c subframe i configuration maximum transmission power.PSRS_ offset, cIt (m) is to be directed to
Serving cell c, 4 bit parameters being semi-statically configured by the higher of m=0 and m=1.Here, m is the triggering for causing SRS transmission
Device type.MSRS, c(i) be the SRS transmission in the subframe of serving cell c bandwidth.The current power control of the subframe i of serving cell c
Adjustment state processed is fc(i)。PO_OUSCH, c(j) and αc(j) be respectively serving cell c PUSCH reference power spectrum density and score
(fractional) power contorl parameters.Here, the type of j instruction PUSCH transmission, that is, in response to semi-continuous, dynamic or at random
Access response license.PLcIt is the downlink path-loss estimator calculated by UE for serving cell c.
Another embodiment of the invention solves above-mentioned Power Control Problem and has minimal impact to having specification
In the case where remain backwards-compatible.According to the present embodiment, UE is configured by higher level signaling to emit and have offset PSRS_ offset(1)
Aperiodic SRS for UL transmit.UE is configured by higher level signaling to emit and have offset PSRS_ offset(2) aperiodic SRS is used
It is transmitted in DL.Power contorl parameters replace single power contorl parameters respectively, and respectively correspond UL power and DL power.
The present invention describes the method for sending two or more power control command to UE with signal form.It can make
Special power control in the one group of power control signal emitted on PDCCH to down link control information (DCI) format
Order configuration UE is to be used for aperiodic SRS transmission.UE can be configured by RRC signaling, wherein two in bit map or
The position of more indexes of person includes the emissive power control command to multiple UE.One TPC index indicates the first power control
The TPC command in circuit, another TPC index indicate the TPC command of the second power control circuit.Each TPC index can indicate 1
Or 2 bit TPC command.For example, in 10 system of LTE version, 2 bits commands with the transmitting of DCI format 3 and 1 bits command with
DCI format 3A transmitting.When the CRC of DCI format is scrambled by PUCCH RNTI, a TPC index can be indicated for PUCCH's
TPC command, and another TPC index can indicate the TPC command for aperiodic SRS transmission.As individual embodiment party
Formula, the set for being able to use one or more indexes indicate different SRS TPC commands to UE.Other variations are not excluded for,
Main thought is using multiple index configurations UE in one group of power control DCI, to indicate for different capacity control loop
TPC command.
Signaling generation is gulped down with superelevation between the eNB that the prior art for CoMP operation is primarily upon in CoMP Cooperative Area
The amount of spitting and less than the situation on the ideal backhaul link of the ultralow delay characterization of the 1-2 milliseconds of orders of magnitude.Embodiments of the present invention
The delay between eNB in signaling is also designed to work in at least deployment of the several ms order of magnitude.Base station can pass through
The PUCCH that backhaul signaling (using such as X2 signaling protocol) request adjacent base station emits them is configured.Alternatively, base station can be
It is small with signal form transmission to one or more Target cells controlled by other base stations via X2 logic interfacing under it is controlled
The PUCCH in area is configured.Bottom line, the PUCCH information that dynamic PUCCH offset parameter is sent on backhaul link with signal form
It is instructed in element.In addition, distribution can be instructed to for emitting the quantity of the RB of CSI report to allow adjacent eNB accurately true
The fixed region HARQ-ACK by the different eNB cell controlled.Other parameters, including one optionally can be sent with signal form
The quantity for the PUCCH format 1/1a/1b resource that can be assigned in RB, for transmitting HARQ-ACK and the cyclic shift quantity that retains with
And the scheduling request in resource block for HARQ-ACK scheduling request and the mixed transport of CSI.
In a different embodiments of the invention, when by the second base station requests, PUCCH configuration or this configuration one
A little elements can be sent by first base station with signal form.In an alternative embodiment, first base station can be in the second base
Preferred PUCCH under the control stood to the transmission of the second base station for neighboring community is configured.
For SRS transmission, first base station can be at the control via such as X2 interface to the second of control neighboring community
The SRS subframe configuration of base station indicating cell and SRS band width configuration.Cell specific SRS of second base station in configuration neighboring community
This information can be considered when the dedicated SRS of configuration and the cell edge UE in the cell configuration.For example, referring to Fig. 3, eNB
202, which can configure macrocell A, makes it have 5ms period and 0 sub-frame offset for the specific SRS subframe of cell.It is receiving
When this information, pico- eNB 206 can configure picocell and make it have the identical 5ms period but have different subframes inclined
It moves, to avoid inter-cell interference.In addition it for TDD system, can be sent out on backhaul link (such as X2 interface) with signal form
Send the parameter for limiting the maximum region UpPTS.
Referring now to Fig. 7, the eNB of network operation is capable of in the exemplary process diagram description shown in heterogeneous network deployment
Between signaling.The cell that the eNB 702 of the cell of control service UE 700 emits neighboring community under the control of eNB 704 is specific
The request of PUCCH and/or SRS configuration.Request message 708 is emitted on backhaul link using X2 signaling protocol.ENB 704 is sent
Confirmation previous Request replies message 710, and also emits requested PUCCH or SRS configuration on backhaul link.eNB
702 determine whether 712UE should be configured to send out to eNB 704 based on the information received from eNB 704 and UE measurement report 706
Penetrate PUCCH and/or SRS.If it is determined that be affirmative, then eNB 702 emits RRC to UE 700 and configures message 714, have with
The dedicated PUCCH or SRS parameter of the PUCCH or SRS configurations match of eNB 704.PUCCH is transmitted, UE 700 is true in 716
Uplink control information 718 required for determining RB mapping and emitting on PUCCH.For being directed to the aperiodicity of eNB 704
SRS request 720, UE emit SRS 722 to eNB 704.Based on UE measurement report 706, eNB can be determined alternatively in 712
UE 700 should continue to use cell public PUCCH or SRS configuration.In the case, block 716,718,720 and 722 is according to eNB
702 cell common configuration executes.
Further, although providing several examples, those skilled in the art will recognize that can be to described reality
The mode of applying carry out various modifications, replaces or changes, and it still falls within the scope of the present invention being determined by the claims that follow
It is interior.Other combinations for capable of obtaining those skilled in the art of this specification for will be apparent.
Claims (18)
1. a kind of method of operating wireless communication apparatus, which comprises
Radio Resource Control message, that is, RRC information is received from base station；
In response to the first state of the RRC information, the specific parameter of cell is selected, or
In response to the second state of the RRC information, the specific parameter of user is selected；And
In response to selected parameter, uplink reference signal is generated.
2. according to the method described in claim 1, wherein, the specific parameter of user is virtual subdistrict identification parameter.
3. according to the method described in claim 2, the described method includes:
The first pseudo-random sequence generator is initialized, for generating basic sequence using the virtual subdistrict identification parameter；
The second pseudo-random sequence generator is initialized, jumps sequence for generating cyclic shift using the virtual subdistrict identification parameter
Column；And
The uplink reference signal that transmitting is generated according to the basic sequence and the cyclic shift hopping sequences.
4. according to the method described in claim 1, wherein, the cell that the specific parameter of cell services the base station is
Public.
5. according to the method described in claim 1, the described method includes: physically being sent out on Uplink Control Channel, that is, PUCCH
Penetrate the reference signal.
6. according to the method described in claim 1, wherein, the reference signal is value detects reference signal i.e. SRS.
7. according to the method described in claim 1, the described method includes:
User equipment is configured using the specific uplink control resource allocation parameters of private subscribers, is used for launch channel to determine
The uplink control region of status information reporting；And
Determine the uplink for emitting scheduling request and hybrid automatic repeat-request confirmation report i.e. HARQ confirmation report
Road control area.
8. according to the method described in claim 1, the described method includes: determining for emitting on uplink control channel
The resource block of downlink control information.
9. according to the method described in claim 8, wherein, the uplink control information is hybrid automatic repeat-request confirmation
That is one of HARQ-ACK, channel status information reports and scheduling request.
10. according to the method described in claim 9, wherein, the HARQ-ACK is to preceding control signal schedule downlink
The response of one of the downlink transmission of data transmission and semi-continuous scheduling.
11. according to the method described in claim 1, the described method includes: utilizing dedicated value detects reference signal resource allocation parameters
I.e. SRS resource allocation of parameters configures user equipment, to determine the time-frequency resources for being used for emission detection reference signal.
12. according to the method for claim 11, wherein the SRS resource allocation of parameters includes SRS band width configuration, SRS
Whether allow the confirmation of simultaneous transmission hybrid automatic repeat-request and the instruction of SRS in frame configuration, subframe and is allocated for sending out
It penetrates one or more in the resource quantity of random access lead code.
13. according to the method described in claim 1, wherein SRS ID, nIDIt is the first state of the RRC information.
14. according to the method described in claim 1, wherein PUCCH ID, nIDIt is second state of the RRC information.
15. according to the method for claim 13, wherein the specific parameter of the cell include sequence from SRS group and when
Gap nSCyclic shift.
16. according to the method for claim 14, wherein the specific parameter of the user includes the sequence 0 from PUCCH group
With time slot nSCyclic shift.
17. a kind of method of operating wireless communication apparatus, which comprises
Receive Radio Resource Control message, that is, RRC information；
In response to the first state of the RRC information, the specific parameter of cell is selected, or
In response to the second state of the RRC information, the specific parameter of user is selected；And
In response to selected parameter, uplink reference signal is generated.
18. a kind of method of operating wireless communication apparatus, comprising:
Radio Resource Control message, that is, RRC information is received from base station；
Determine PUCCH or SRS ID, nIDWith the presence or absence of in the RRC information；
Work as nIDWhen being present in the RRC information, n is utilizedIDInitialization is used for basic sequence group, sequence and cyclic shift hopping sequences
Pseudorandom number generator；
Work as nIDWhen being not present in the RRC information, initialized using the Physical Cell Identifier with the base station association, that is, PCID
Pseudorandom number generator for basic sequence group, sequence and cyclic shift hopping sequences；
In response to the first state of the RRC information, the specific parameter of cell is selected, or
In response to the second state of the RRC information, the specific parameter of user is selected；And
In response to selected parameter, uplink reference signal is generated.
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| US13/952,588 US10433159B2 (en) | 2012-08-03 | 2013-07-27 | Uplink signaling for cooperative multipoint communication |
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