CN102223726A - Method and system for sending SRS (survey reference signal) - Google Patents

Abstract

The invention discloses a method and a system for sending an SRS (survey reference signal); the method comprises the following steps: user equipment (UE) transmits the SRS to a base station on a time domain resource, a frequency domain resource and/or a code domain resource, wherein the time domain resource comprises the last time domain sign, the first time domain sign or the last but one time domain sign of a sub-frame of an SRS cycle; the frequency domain resource comprises a frequency domain location of the SRS or a sending frequency comb of the SRS, the code domain resource is obtained by the following method: a sequence group number of the SRS is generated by the UE according to a parameter which is configured for the UE by the base station through a high level signaling and is proprietary by users, and the code domain resource which is needed for sending the SRS is determined according to the generated sequence group number of the SRS. The available resource of the SRS is increased, the user multiplexing capacity of the SRS is improved, and the channel estimation quality of the base station to the SRS is improved, therefore, the application of the coordinated multi-point transmission technology to the system is supported effectively.

Description

The sending method of a kind of SRS and system

Technical field

The present invention relates to measuring reference signals (SRS) correlation technique of senior LTE (LTE-A), relate in particular to sending method and the system of a kind of SRS.

Background technology

Long Term Evolution (LTE, Long Term Evolution) uplink physical channel of system comprises Physical Random Access Channel (PRACH, Physical Random Access Channel), Physical Uplink Shared Channel (PUSCH, Physical Uplink Shared Channel), Physical Uplink Control Channel (PUCCH, Physical Uplink Control Channel).Wherein, PUSCH has two kinds of different Cyclic Prefix (CP, Cyclic Prefix) length, is respectively general cyclic prefix (Normal CP, Normal Cyclic Prefix) and extended cyclic prefix (Extended CP, Extended Cyclic Prefix).Each of PUSCH sends subframe (Subframe) to be made up of two time slots (Slot), and for different circulating prefix-lengths, residing position can be different in subframe for demodulated reference signal (DMRS, Demodulation Reference Signal).Shown in Fig. 1 a, Fig. 1 b, Fig. 1 a, Fig. 1 b are the time-domain position schematic diagrames of DMRS in the prior art, wherein, Fig. 1 a is when adopting general cyclic prefix, the time-domain position schematic diagram of DMRS, each subframe contain 14 OFDMs (OFDM, Orthogonal Frequency Division Multiplexing) symbol, comprise the DMRS symbol, the time-domain position of a subframe of OFDM symbology; Fig. 1 b is when adopting extended cyclic prefix, the schematic diagram of the time-domain position of DMRS, and each subframe contains 12 data in time domain OFDM symbols.

Cooperative multipoint transmission technology (CoMP, Coordinated Multi-Point Transmission and Reception), be to utilize the transmitting antenna cooperation transmission of a plurality of sub-districts (Cell) to realize the higher capacity and the reliable transmission of cell edge place Radio Link, can effectively solve the cell edge interference problem.The structural representation that the basic principle of multicast communication and multi-plot joint are handled, as shown in Figure 2.Descending CoMP is divided into two classes: Combined Treatment/joint transmission (JP/JT, Joint Processing/Joint Transmission) and cooperative scheduling/wave beam forming (CS/CB, Coordinated Scheduling/Beamforming).In JT, data send simultaneously from a plurality of sub-districts, and transmission data, scheduling and channel condition information only carry out mutual between a plurality of launch points that cooperation is concentrated; And in CS/CB, have only Serving cell to send data to user terminal (UE), scheduling and Beamforming information are concentrated mutual in the CoMP cooperation.A cooperation collection is just formed in the different sub-district that participates in transmission or cooperation, and to some user terminals (UE, User Equipment), cooperation concentrates that a sub-district is arranged is Serving cell, and remaining sub-district is a cooperation cell.

Measuring reference signals (SRS, Sounding Reference Signal) is the signal that is used for measuring radio channel information (CSI, Channel State Information) between a kind of UE and base station.In the LTE system, UE regularly sends uplink SRS according to the parameters such as bandwidth, frequency domain position, sequence cyclic shift, cycle and sub-frame offset of base station (eNB, Evolved NodeB) indication on last data symbol that sends subframe; ENB judges the up CSI of UE according to the SRS that receives, and carries out operations such as frequency domain selection scheduling, closed power control according to the CSI that obtains.

In the LTE system, the SRS sequence that UE sends is by to the YITIAOGEN sequence

Carry out in time domain that cyclic shift α obtains.To carrying out different cyclic shift α with the YITIAOGEN sequence, just can access different SRS sequences, and mutually orthogonal between these SRS sequences that obtain, therefore, can use to different UE these SRS sequence allocation, to realize the code division multiple access between UE.In the LTE system, the SRS sequence definition 8 cyclic shift α, provide by formula (1):

$\mathrm{\α}=2\mathrm{\π}\frac{n_{\mathrm{SRS}}^{\mathrm{cs}}}{8}---\left(1\right)$

In the formula (1),

Signaling by 3bit is indicated, and is respectively 0,1,2,3,4,5,6 and 7.That is to say that under same running time-frequency resource, the UE in the sub-district has 8 available sign indicating number resources, eNB can dispose 8 UE at most and send SRS simultaneously on identical running time-frequency resource.Formula (1) can be regarded as the SRS sequence uniformly-spaced is divided into 8 parts in time domain, but because the SRS sequence length is 12 multiple, so the minimum length of SRS sequence is 24.

In the LTE system, the frequency domain bandwidth of SRS adopts tree to be configured.The corresponding tree structure of each SRS band width configuration (SRS bandwidth configuration), the SRS bandwidth (SRS-Bandwidth) of top (or being called ground floor) is to maximum SRS bandwidth that should the SRS band width configuration, or is called the SRS bandwidth range.UE is according to the indication of the signaling of base station, calculate the SRS bandwidth of self after, the top signaling frequency domain position n that sends according to eNB again _RRCDetermine that self sends the frequency domain initial position of SRS.Fig. 3 distributes different n in the prior art _RRCUE send the schematic diagram of the frequency domain initial position of SRS, as shown in Figure 3, distributed different n _RRCUE will send SRS in the zones of different of sub-district SRS bandwidth, wherein, UE1 is according to n _RRC=0 determines to send the frequency initial position of SRS, and UE2 is according to n _RRC=3 determine to send the frequency initial position of SRS, and UE3 is according to n _RRC=4 determine to send the frequency initial position of SRS, and UE4 is according to n _RRC=6 determine to send the frequency initial position of SRS.

The employed sequence of SRS is selected from the demodulation pilot frequency sequence group, and when the SRS of UE bandwidth was 4 Resource Block (RB, Resource Block), using length was the sequence of the computer generation (CG, Computer Generated) of 2 RB; When the SRS of UE bandwidth during, use Zadoff-Chu (ZC) sequence of corresponding length greater than 4 RB.

In addition, in same SRS bandwidth, the subcarrier of SRS (sub-carrier) is to place at interval, that is to say, pectinate texture is adopted in the transmission of SRS.The quantity of the frequency comb in the LTE system (frequency comb) is 2, and also the repeat factor value (RPF, RePetition Factor) corresponding to time domain is 2.Fig. 4 is the schematic diagram of the pectinate texture of prior art SRS, and among Fig. 4, the lattice that point is filled is represented the situation of Comb=1, and the lattice that oblique line is filled is represented the situation of Comb=0.As shown in Figure 4, each UE only uses in two frequency comb, Comb=0 or Comb=1 when sending SRS.Like this, UE only uses the frequency domain index to send SRS as the subcarrier of even number or odd number according to the frequency comb comb position indication of the top signaling of 1 bit.This pectinate texture allows more UE to send SRS in same SRS bandwidth.

In same SRS bandwidth, a plurality of UE can use different cyclic shifts on same frequency comb, send SRS by code division multiplexing then, also can two UE on different frequency comb, send SRS by frequency division multiplexing.For instance, in the LTE system, in certain SRS bandwidth (4 RB), send the UE of SRS, operable cyclic shift has 8, operable frequency comb is 2, so UE always has 16 resources that can be used to send SRS, that is to say, in this SRS bandwidth, can send 16 SRS simultaneously at most.Owing in the LTE system, do not support uplink single user multiple-input and multiple-output (SU-MIMO, Single User Multiple Input Multiple Output), UE constantly can only have an antenna transmission SRS at each, so a UE only needs a SRS resource, therefore, in above-mentioned SRS bandwidth, system is multiplexing 16 UE at most simultaneously.

(LTE-A, LTE-Advanced) system is the evolution system of future generation of LTE system to senior LTE, at up support SU-MIMO, and can use 4 antennas as up transmitting antenna at most.That is to say that UE can send SRS simultaneously at synchronization on many antennas, and eNB need estimate state on every channel according to the SRS that receives on the every antenna.

In the research of existing LTE-A Release 10 (LTE-A version 10), propose: in uplink communication, should use the SRS of non-precoding (being that antenna is proprietary), the DMRS of PUSCH is then carried out precoding.The base station can estimate up original CSI by receiving the SRS of non-precoding, and the DMRS that has passed through precoding then can not make the base station estimate up original CSI.At this moment, when UE used the SRS of the non-precoding of many antenna transmission, the needed SRS resource of each UE all can increase, and had also just caused in the system simultaneously multiplexing UE quantity to descend.UE can send SRS by high-level signaling (be also referred to as by trigger type 0 and trigger) or these two kinds of triggering modes of Downlink Control Information (be also referred to as by trigger type 1 and trigger), that trigger based on high-level signaling be cycle SRS, and based on the Downlink Control Information triggering is SRS aperiodic.Though in LTE-A Release 10, increased the mode that sends SRS aperiodic, improved the utilance of SRS resource to a certain extent, improve the flexibility of scheduling of resource, but in following LTE-A Release 11 (LTE-A version 11) research, the CoMP system usually can utilize channel reciprocity to obtain descending CSI by measuring SRS in order to reduce the feedback quantity of UE; In addition, along with the application of the distributed remote wireless front end that has same cells ID (Distributed RRHs with the same cell ID), the number of users in the sub-district increases, and therefore just the multiplexing capacity of the user of SRS is had higher requirement.How further increasing the available resources of SRS, improve the multiplexing capacity of user of SRS, improve the channel estimating quality of receiving terminal (base station) to SRS, more effectively support the application of CoMP system, is present problem demanding prompt solution.

Summary of the invention

In view of this, main purpose of the present invention is to provide sending method and the system of a kind of SRS, to increase the available resources of SRS, improves the multiplexing capacity of user of SRS, improves the channel estimating quality of base station to SRS.

For achieving the above object, technical scheme of the present invention is achieved in that

The invention provides the sending method of a kind of measuring reference signals (SRS), this method comprises:

User terminal (UE) sends SRS to the base station on time-domain resource, frequency domain resource and/or sign indicating number territory resource; Wherein, described time-domain resource comprises: last time-domain symbol of SRS cycle place subframe or first time-domain symbol or penult time-domain symbol; Described frequency domain resource comprises: the frequency domain position of SRS or the transmission frequency of SRS comb; Described sign indicating number territory resource obtains in the following manner: UE is the proprietary parameter of user of UE configuration according to the base station by high-level signaling, produces the sequence set numbering of SRS, and determines to send the required sign indicating number territory resource of SRS according to the sequence set numbering of the SRS that is produced.

The sequence set of described SRS is numbered: the sequence set numbering of the demodulated reference signal (DMRS) of Physical Uplink Shared Channel (PUSCH) is numbered or be used for to the sequence set that is used for Physical Uplink Control Channel (PUCCH).

The sequence set numbering of the described PUCCH of being used for draws in the following manner:

$u=(f_{\mathrm{gh}}\left(n_s\right)+f_{\mathrm{ss}}^{\mathrm{PUCCH}})\mathrm{mod}30$

Wherein, u represents to be used for the sequence set numbering of PUCCH, f _Gh(n _s) expression group redirect pattern,

The sequence displacement pattern of expression PUCCH, mod represents modulo operation.

Described

Draw in the following manner:

$f_{\mathrm{ss}}^{\mathrm{PUCCH}}=(N_{\mathrm{ID}}^{\mathrm{cell}}\mathrm{mod}30+{\mathrm{\Δ}}_{\mathrm{ss}})\mathrm{mod}30$

Or $f_{\mathrm{ss}}^{\mathrm{PUCCH}}=(N_{\mathrm{ID}}^{\mathrm{cell}}\mathrm{mod}30+{\mathrm{\Δ}}_{\mathrm{SS}}^{\mathrm{SRS}})\mathrm{mod}30$

Wherein,

Expression physical-layer cell identifier (ID), Δ _SsBe that high-level signaling is the offset parameter of PUSCH configuration, Δ _Ss∈ 0,1 ..., 29}; Be that high-level signaling is the offset parameter of SRS configuration,

Described

Draw in the following manner:

$f_{\mathrm{ss}}^{\mathrm{PUCCH}}=({\mathrm{\Σ}}_{i=0}^{7}c(8n_s+i)\·2^i)\mathrm{mod}30$

Wherein, c (i) represents pseudo random sequence, n _sRepresent the time-gap number in the radio frames, use in the incipient stage of each radio frames

Pseudo-random sequence generator is carried out initialization, n _RNTIBe Radio Network Temporary Identifier, n _RNTIFor the base station is the proprietary parameter of user of UE configuration by high-level signaling.

Described f _Gh(n _s) draw in the following manner:

$f_{\mathrm{gh}}\left(n_s\right)=\left\{\begin{array}{c}0\\ ({\mathrm{\Σ}}_{i=0}^{7}c(8n_s+i)\·2^i)\mathrm{mod}30\end{array}\right.$

If the group redirect does not enable, then f _Gh(n _s) value be 0; If the group redirect enables, then f _Gh(n _s) value be

Wherein, c (i) represents pseudo random sequence, n _sRepresent the time-gap number in the radio frames.

Described UE on the frequency domain resource before the base station sends SRS, this method also comprises:

Described base station according to received cooperation cell by the SRS resource occupation information that X2 interface sends over, the UE that disposes this base station affiliated subdistrict with nonoverlapping SRS frequency domain position of the SRS resource of cooperation cell or frequency comb on send SRS.

Described UE on the frequency domain resource before the base station sends SRS, this method also comprises:

Described base station sends the SRS resource occupation information of this sub-district to cooperation cell by X2 interface.

This method further comprises:

The Physical Resource Block (PRB) of information word (IE) by an X2 interface SRS takies the proprietary parameter information of user of indication and/or IE item SRS, represents the resource occupation information of SRS.

The PRB of described IE item SRS takies indication and comprises: the CoMP SRS indication of every PRB; The proprietary parameter information of user of described IE item SRS comprises: the CoMP SRS information indication that the user is proprietary.

The quantity of the transmission frequency comb of described SRS is 2,3 or 4.

The present invention also provides the transmitting system of a kind of SRS, and this system comprises: UE and base station, wherein,

Described UE is used for sending SRS to the base station on time-domain resource, frequency domain resource and/or sign indicating number territory resource; Wherein, described time-domain resource comprises: last time-domain symbol of SRS cycle place subframe or first time-domain symbol or penult time-domain symbol; Described frequency domain resource comprises: the frequency domain position of SRS or the transmission frequency of SRS comb; Described sign indicating number territory resource obtains in the following manner: UE is the proprietary parameter of user of UE configuration according to the base station by high-level signaling, produces the sequence set numbering of SRS, and determines to send the required sign indicating number territory resource of SRS according to the sequence set numbering of the SRS that is produced;

Described base station is used for receiving the SRS that UE sends on time-domain resource, frequency domain resource and/or sign indicating number territory resource.

The sequence set of described SRS is numbered: the sequence set numbering of the DMRS of PUSCH is numbered or be used for to the sequence set that is used for PUCCH.

The sequence set numbering of the described PUCCH of being used for draws in the following manner:

$u=(f_{\mathrm{gh}}\left(n_s\right)+f_{\mathrm{ss}}^{\mathrm{PUCCH}})\mathrm{mod}30$

Wherein, u represents to be used for the sequence set numbering of PUCCH, f _Gh(n _s) expression group redirect pattern,

The sequence displacement pattern of expression PUCCH, mod represents modulo operation.

Described

Draw in the following manner:

$f_{\mathrm{ss}}^{\mathrm{PUCCH}}=(N_{\mathrm{ID}}^{\mathrm{cell}}\mathrm{mod}30+{\mathrm{\Δ}}_{\mathrm{ss}})\mathrm{mod}30$

Or $f_{\mathrm{ss}}^{\mathrm{PUCCH}}=(N_{\mathrm{ID}}^{\mathrm{cell}}\mathrm{mod}30+{\mathrm{\Δ}}_{\mathrm{SS}}^{\mathrm{SRS}})\mathrm{mod}30$

Wherein,

Expression physical-layer cell identifier (ID), Δ _SsBe that high-level signaling is the offset parameter of PUSCH configuration, Δ _Ss∈ 0,1 ..., 29};

Be that high-level signaling is the offset parameter of SRS configuration,

Described

Draw in the following manner:

$f_{\mathrm{ss}}^{\mathrm{PUCCH}}=({\mathrm{\Σ}}_{i=0}^{7}c(8n_s+i)\·2^i)\mathrm{mod}30$

Wherein, c (i) represents pseudo random sequence, n _sRepresent the time-gap number in the radio frames, use in the incipient stage of each radio frames

Pseudo-random sequence generator is carried out initialization, n _RNTIBe Radio Network Temporary Identifier, n _RNTIFor the base station is the proprietary parameter of user of UE configuration by high-level signaling.

Described f _Gh(n _s) draw in the following manner:

$f_{\mathrm{gh}}\left(n_s\right)=\left\{\begin{array}{c}0\\ ({\mathrm{\Σ}}_{i=0}^{7}c(8n_s+i)\·2^i)\mathrm{mod}30\end{array}\right.$

If the group redirect does not enable, then f _Gh(n _s) value be 0; If the group redirect enables, then f _Gh(n _s) value be Wherein, c (i) represents pseudo random sequence, n _sRepresent the time-gap number in the radio frames.

Described base station is further used for, described UE on the frequency domain resource before the base station sends SRS, according to received cooperation cell by the SRS resource occupation information that X2 interface sends over, the UE that disposes this base station affiliated subdistrict with nonoverlapping SRS frequency domain position of the SRS resource of cooperation cell or frequency comb on send SRS.

Described base station is further used for, described UE on the frequency domain resource before the base station sends SRS, send the SRS resource occupation information of this sub-district to cooperation cell by X2 interface.

The Physical Resource Block (PRB) of information word (IE) by an X2 interface SRS takies the proprietary parameter information of user of indication and/or IE item SRS, represents the resource occupation information of SRS.

The PRB of described IE item SRS takies indication and comprises: the CoMP SRS indication of every PRB; The proprietary parameter information of user of described IE item SRS comprises: the CoMP SRS information indication that the user is proprietary.

The quantity of the transmission frequency comb of described SRS is 2,3 or 4.

The sending method of a kind of SRS provided by the present invention and system send SRS to the base station by UE on time-domain resource, frequency domain resource and/or sign indicating number territory resource; Wherein, time-domain resource comprises: last time-domain symbol of SRS cycle place subframe or first time-domain symbol or penult time-domain symbol; Frequency domain resource comprises: the frequency domain position of SRS or the transmission frequency of SRS comb; Sign indicating number territory resource obtains in the following manner: UE is the proprietary parameter of user of UE configuration according to the base station by high-level signaling, produces the sequence set numbering of SRS, and determines to send the required sign indicating number territory resource of SRS according to the sequence set numbering of the SRS that is produced.By the present invention, can increase the available resources of SRS, improve the multiplexing capacity of user of SRS, improve the channel estimating quality of base station, and then more effectively support the application of CoMP system SRS.

Description of drawings

The time-domain position schematic diagram of DMRS when Fig. 1 a is the available technology adopting general cyclic prefix;

The time-domain position schematic diagram of DMRS when Fig. 1 b is the available technology adopting extended cyclic prefix;

Fig. 2 is the basic principle of multicast communication in the prior art and the structural representation that multi-plot joint is handled;

Fig. 3 distributes different n in the prior art _RRCUE send the schematic diagram of the frequency domain initial position of SRS;

Fig. 4 is the schematic diagram of the pectinate texture of SRS in the prior art;

Fig. 5 is the flow chart of the sending method of the SRS in the embodiment of the invention.

Embodiment

The technical solution of the present invention is further elaborated below in conjunction with the drawings and specific embodiments.

The sending method of the SRS that the embodiment of the invention provided as shown in Figure 5, comprising:

UE sends SRS to the base station on time-domain resource, frequency domain resource and/or sign indicating number territory resource; Wherein, time-domain resource comprises: last time-domain symbol of SRS cycle place subframe or first time-domain symbol or penult time-domain symbol; Frequency domain resource comprises: the frequency domain position of SRS or the transmission frequency of SRS comb; Sign indicating number territory resource obtains in the following manner: UE is the proprietary parameter of user of UE configuration by high-level signaling according to the base station, produce the sequence set numbering (SRS sequence-group number) of SRS, and determine to send the required sign indicating number territory resource of SRS according to the sequence set numbering of the SRS that is produced.

Wherein, can use the sequence set numbering that is used for PUCCH to number as the sequence set of SRS; Perhaps, the sequence set numbering that is used for the DMRS of PUSCH is numbered as the sequence set of SRS.

On last time-domain symbol of SRS cycle place subframe or first time-domain symbol or penult time-domain symbol, send SRS by UE is set, can increase the available resources of SRS, improve the multiplexing capacity of user of SRS to the base station.

Be elaborated below in conjunction with the sending method of specific embodiment to the SRS of the embodiment of the invention.

In embodiments of the invention one, UE sends SRS to the base station on the resource of sign indicating number territory.Described sign indicating number territory resource obtains in the following manner: the proprietary parameter of user that UE disposes for UE by high-level signaling (as the radio resource control RRC signaling) according to the base station, produce the sequence set numbering of SRS, and determine to send the required sign indicating number territory resource of SRS according to the sequence set numbering of the SRS that is produced.

Wherein, can use the sequence set numbering that is used for PUCCH to number as the sequence set of SRS; Perhaps, the sequence set numbering that is used for the DMRS of PUSCH is numbered as the sequence set of SRS.

The sequence set numbering that is used for PUCCH when use is during as the sequence set numbering of SRS, needs the sequence of the wherein a kind of definite PUCCH by the two kinds of following methods pattern (sequence-shift pattern) that is shifted

Method one: obtain by following formula (2) or (3)

$f_{\mathrm{ss}}^{\mathrm{PUCCH}}=(N_{\mathrm{ID}}^{\mathrm{cell}}\mathrm{mod}30+{\mathrm{\Δ}}_{\mathrm{ss}})\mathrm{mod}30---\left(2\right)$

$f_{\mathrm{ss}}^{\mathrm{PUCCH}}=(N_{\mathrm{ID}}^{\mathrm{cell}}\mathrm{mod}30+{\mathrm{\Δ}}_{\mathrm{SS}}^{\mathrm{SRS}})\mathrm{mod}30---\left(3\right)$

Wherein,

Expression physical-layer cell identifier (ID), Δ _SsBe that high-level signaling is the offset parameter (groupAssignmentPUSCH) of PUSCH configuration,

Be that high-level signaling is the offset parameter (groupAssignmentSRS) of SRS configuration.Described Δ _SsWith

The base station that is aforementioned indication is the proprietary parameter of user of UE configuration by high-level signaling, if adopt above-mentioned formula (2) to obtain

The proprietary parameter of so described user promptly is meant Δ _SsIf adopt above-mentioned formula (3) to obtain

The proprietary parameter of so described user promptly is meant

Method two: obtain by following formula (4)

$f_{\mathrm{ss}}^{\mathrm{PUCCH}}=({\mathrm{\Σ}}_{i=0}^{7}c(8n_s+i)\·2^i)\mathrm{mod}30---\left(4\right)$

Wherein, c (i) is pseudo random sequence (pseudo-random sequence), n _sBe the time-gap number (Slot number within a radio frame) in the radio frames, use in the incipient stage of each radio frames Pseudo-random sequence generator is carried out initialization, n _RNTIBe Radio Network Temporary Identifier (Radio Network Temporary Identifier), n _RNTIBeing aforementioned base station is the proprietary parameter of user of UE configuration by high-level signaling.

Obtain

After, obtain being used for the sequence set numbering u of PUCCH again by following formula (5):

$u=(f_{\mathrm{gh}}\left(n_s\right)+f_{\mathrm{ss}}^{\mathrm{PUCCH}})\mathrm{mod}30---\left(5\right)$

Wherein, f _Gh(n _s) be group redirect pattern (group-hopping pattern), obtain by following formula (6):

$f_{\mathrm{gh}}\left(n_s\right)=\left\{\begin{array}{cc}0& \mathrm{ifgrouphoppingisdisabled}\\ ({\mathrm{\Σ}}_{i=0}^{7}c(8n_s+i)\·2^i)& \mathrm{ifgrouphoppingisenabled}\end{array}\right.---\left(6\right)$

If i.e. group redirect does not enable, then f _Gh(n _s) value be 0; If the group redirect enables, then f _Gh(n _s) value be $({\mathrm{\Σ}}_{i=0}^{7}c(8n_s+i)\·2^i)\mathrm{mod}30.$

Obtain after the sequence set numbering u of SRS, UE obtains the sequence of SRS according to following formula (7)～(10) again

Be and send the required sign indicating number territory resource of SRS:

$r_{\mathrm{SRS}}^{\left(\tilde{p}\right)}\left(n\right)=r_{u,v}^{\left({\mathrm{\α}}_{\tilde{p}}\right)}\left(n\right)---\left(7\right)$

${\mathrm{\α}}_{\tilde{p}}=2\mathrm{\π}\frac{n_{\mathrm{SRS}}^{\mathrm{cs},\tilde{p}}}{8}---\left(8\right)$

$n_{\mathrm{SRS}}^{\mathrm{cs},\tilde{p}}=(n_{\mathrm{SRS}}^{\mathrm{cs}}+\frac{8\tilde{p}}{N_{\mathrm{ap}}})\mathrm{mod}8---\left(9\right)$

$\tilde{p}\∈\{\mathrm{0,1},...,N_{\mathrm{ap}}-1\}---\left(10\right)$

Wherein,

Be configured by high-level signaling,

For sending the antenna end slogan of SRS, N _ApFor sending the antenna amount of SRS.Reference signal

The definition of definition and LTE agreement the inside consistent.

The sequence set numbering of DMRS that is used for PUSCH when use is during as the sequence set numbering of SRS, the sequence that obtains PUSCH by formula (11) and (12) pattern (sequence-shift pattern) that is shifted

$f_{\mathrm{ss}}^{\mathrm{PUCCH}}=N_{\mathrm{ID}}^{\mathrm{cell}}\mathrm{mod}30---\left(11\right)$

$f_{\mathrm{ss}}^{\mathrm{PUSCH}}=(f_{\mathrm{ss}}^{\mathrm{PUCCH}}+{\mathrm{\Δ}}_{\mathrm{ss}})\mathrm{mod}30---\left(12\right)$

Wherein, Δ _SsBe that high-level signaling is the proprietary offset parameter (groupAssignmentPUSCH) of user of PUSCH configuration, Δ _Ss∈ 0,1 ..., 29}.

Obtain

After, obtain being used for the sequence set numbering u of PUSCH again by following formula (13):

$u=(f_{\mathrm{gh}}\left(n_s\right)+f_{\mathrm{ss}}^{\mathrm{PUCCH}})\mathrm{mod}30---\left(13\right)$

Wherein, f _Gh(n _s) for group redirect pattern (group-hopping pattern), obtain by aforementioned formula (6).

Obtain after the sequence set numbering u of SRS, UE obtains the sequence of SRS according to aforementioned formula (7)～(10) again

Be and send the required sign indicating number territory resource of SRS.

In the foregoing description, by being the proprietary biasing of UE configure user, and draw the sequence set numbering that is used for PUCCH or PUSCH based on the biasing of configuration, as the sequence set numbering of SRS, UE sends SRS to the base station on the sequence set numbering of described SRS; Thereby can increase the available resources of SRS, improve the multiplexing capacity of user of SRS.

In embodiments of the invention two, UE sends SRS to the base station on frequency domain resource.Described frequency domain resource comprises: the frequency domain position of SRS or the transmission frequency of SRS comb.

Further, at UE before the base station sends SRS, the base station according to received cooperation cell by the SRS resource occupation information that X2 interface sends over, the UE that disposes this sub-district with nonoverlapping SRS frequency domain position of the SRS resource of cooperation cell or frequency comb on send SRS.Avoid on overlapping SRS frequency domain position or frequency comb, sending SRS, can improve the channel estimating quality of receiving terminal (base station) SRS.

Further, before the base station sent SRS, the base station sent the SRS resource occupation information of this sub-district to cooperation cell by X2 interface at UE.

Further, can be by the information word (IE of X2 interface, Information Element) Physical Resource Block (PRB, Physical Resource Block) of a SRS takies the proprietary parameter information of user of indication and/or SRS, represents the resource occupation information of SRS.

Further, the proprietary parameter information of user of the Physical Resource Block occupied information of IE item SRS and IE item SRS is gone up the IE item that is provided with for import information message (LOAD INFORMATION message).

Further, the PRB of IE item SRS takies to indicate and comprises: the CoMP SRS indication (CoMP SRS in PRB Indication) of every PRB; The proprietary parameter information of user of IE item SRS comprises: the CoMP SRS information indication (CoMP SRS ue-specific Information Indication) that the user is proprietary.

For IE item CoMP SRS in PRB Indication, suppose that it is b that i PRB (1≤i≤110) goes up corresponding 4bits _I3b _I2b _I1b _I0If b _I3b _I2b _I1b _I0=0000, then there is not CoMP SRS on i PRB; If b _I3b _I2b _I1b _I0=0001, then representing has CoMP SRS on i the PRB, and comb=0 is occupied; If b _I3b _I2b _I1b _I0=0010, then representing has CoMP SRS on i the PRB, and comb=1 is occupied; If b _I3b _I2b _I1b _I0=0100, then representing has CoMP SRS on i the PRB, and comb=2 is occupied; If b _I3b _I2b _I1b _I0=1000, then representing has CoMP SRS on i the PRB, and comb=3 is occupied; If b _I3b _I2b _I1b _I0=0011, then representing has CoMP SRS on i the PRB, and comb=0 and comb=1 are occupied; If b _I3b _I2b _I1b _I0=0101, then representing has CoMP SRS on i the PRB, and comb=0 and comb=2 are occupied; And the like, if b _I3b _I2b _I1b _I0In b _Ij(j is 0 to 3 integer) corresponds to 1, and then expression has CoMP SRS, and comb=j is occupied.

Further, the transmission frequency of SRS comb quantity can be configured to 2,3 or 4.Frequency comb quantity is 2 o'clock, the corresponding 2 bit b of each PRB _I1b _I0Frequency comb quantity is 3 o'clock, then the corresponding 3 bit b of each PRB _I2b _I1b _I0Frequency comb quantity is 4 o'clock, then the corresponding 4 bit b of each PRB _I3b _I2b _I1b _I0

Frequency comb quantity is 4 o'clock, and its IE form that specifically increases newly on X2 interface is as shown in table 1 below:

Table 1

For IE item CoMP SRS ue-specific Information Indication, the UE-specific SRS parameter information that cooperation cell sends by X2 interface, promptly the mutual information content comprise following one or several UE-specific SRS parameter:

The bandwidth of SRS (srs-Bandwidth/srs-BandwidthAp) is set to: ENUMERATED{bw0, bw1, bw2, bw3};

The bandwidth of frequency domain Hopping (srs-HoppingBandwidth) is set to: ENUMERATED{hbw0, hbw1, hbw2, hbw3};

The Physical Resource Block original position (freqDomainPosition/freqDomainPositionAp) of distributing is set to: NTEGER (0...23);

SRS transmission cycle (single or up to not enabling) (duration), is set to BOOLEAN;

SRS configuration index (srs-ConfigIndex/srs-ConfigIndexAp) has been represented cycle and initial subframe, is set to INTEGER (0..1023)/INTEGER (0..32);

The pectinate texture (transmissionComb/transmissionCombAp) of transmission is set to INTEGER (0,1,2,3);

The cyclic shift amount (cyclicShift/cyclicShiftAp) of sequence is set to ENUMERATED{cs0, cs1, cs2, cs3, cs4, cs5, cs6, cs7}.

SRS number of transmit antennas (srs-AntennaPort/srs-AntennaPortAp) is set to INTEGER (0,1,2,4);

The IE form is as shown in table 2 below:

Table 2

The sending method of corresponding above-mentioned SRS, embodiments of the invention also provide the transmitting system of a kind of SRS, comprising: UE and base station.Wherein, UE is used for sending SRS to the base station on time-domain resource, frequency domain resource and/or sign indicating number territory resource; Wherein, described time-domain resource comprises: last time-domain symbol of SRS cycle place subframe or first time-domain symbol or penult time-domain symbol; Described frequency domain resource comprises: the frequency domain position of SRS or the transmission frequency of SRS comb; Described sign indicating number territory resource obtains in the following manner: UE is the proprietary parameter of user of UE configuration according to the base station by high-level signaling, produces the sequence set numbering of SRS, and determines to send the required sign indicating number territory resource of SRS according to the sequence set numbering of the SRS that is produced.The base station is used for receiving the SRS that UE sends on time-domain resource, frequency domain resource and/or sign indicating number territory resource.

Wherein, the sequence set of SRS numbering can for: be used for the sequence set numbering of PUCCH or be used for the sequence set numbering of the DMRS of PUSCH.

Further, the sequence set that is used for PUCCH is numbered and can be drawn in the following manner:

$u=(f_{\mathrm{gh}}\left(n_s\right)+f_{\mathrm{ss}}^{\mathrm{PUCCH}})\mathrm{mod}30$

Wherein, u represents to be used for the sequence set numbering of PUCCH, f _Gh(n _s) expression group redirect pattern, The sequence displacement pattern of expression PUCCH, mod represents modulo operation.

Can draw in the following manner:

$f_{\mathrm{ss}}^{\mathrm{PUCCH}}=(N_{\mathrm{ID}}^{\mathrm{cell}}\mathrm{mod}30+{\mathrm{\Δ}}_{\mathrm{ss}})\mathrm{mod}30$

Or $f_{\mathrm{ss}}^{\mathrm{PUCCH}}=(N_{\mathrm{ID}}^{\mathrm{cell}}\mathrm{mod}30+{\mathrm{\Δ}}_{\mathrm{SS}}^{\mathrm{SRS}})\mathrm{mod}30$

Wherein,

Expression physical-layer cell identifier (ID), Δ _SsBe that high-level signaling is the offset parameter of PUSCH configuration, Δ _Ss∈ 0,1 ..., 29};

Be that high-level signaling is the offset parameter of SRS configuration,

Also can draw in the following manner:

$f_{\mathrm{ss}}^{\mathrm{PUCCH}}=({\mathrm{\Σ}}_{i=0}^{7}c(8n_s+i)\·2^i)\mathrm{mod}30$

Wherein, c (i) represents pseudo random sequence, n _sRepresent the time-gap number in the radio frames, use in the incipient stage of each radio frames

Pseudo-random sequence generator is carried out initialization, n _RNTIBe Radio Network Temporary Identifier, n _RNTIFor the base station is the proprietary parameter of user of UE configuration by high-level signaling.

f _Gh(n _s) can draw in the following manner:

$f_{\mathrm{gh}}\left(n_s\right)=\left\{\begin{array}{c}0\\ ({\mathrm{\Σ}}_{i=0}^{7}c(8n_s+i)\·2^i)\mathrm{mod}30\end{array}\right.$

If the group redirect does not enable, then f _Gh(n _s) value be 0; If the group redirect enables, then f _Gh(n _s) value be

Wherein, c (i) represents pseudo random sequence, n _sRepresent the time-gap number in the radio frames.

Preferable, the base station is further used for, UE on the frequency domain resource before the base station sends SRS, according to received cooperation cell by the SRS resource occupation information that X2 interface sends over, the UE that disposes this base station affiliated subdistrict with nonoverlapping SRS frequency domain position of the SRS resource of cooperation cell or frequency comb on send SRS.

Preferable, the base station is further used for, UE on the frequency domain resource before the base station sends SRS, the base station sends the SRS resource occupation information of this sub-district to cooperation cell by X2 interface.

The Physical Resource Block (PRB) of IE item SRS by X2 interface takies the proprietary parameter information of user of indication and/or IE item SRS, represents the resource occupation information of SRS.The PRB of described IE item SRS takies indication and comprises: CoMP SRS in PRB Indication; The proprietary parameter information of user of described IE item SRS comprises: CoMP SRS ue-specific Information Indication.

Preferable, the proprietary parameter information of user of the Physical Resource Block occupied information of IE item SRS and IE item SRS is gone up the IE item that is provided with for import information message (LOAD INFORMATION message).

The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.

Claims (22)

1. the sending method of a measuring reference signals (SRS) is characterized in that, this method comprises:

User terminal (UE) sends SRS to the base station on time-domain resource, frequency domain resource and/or sign indicating number territory resource; Wherein, described time-domain resource comprises: last time-domain symbol of SRS cycle place subframe or first time-domain symbol or penult time-domain symbol; Described frequency domain resource comprises: the frequency domain position of SRS or the transmission frequency of SRS comb; Described sign indicating number territory resource obtains in the following manner: UE is the proprietary parameter of user of UE configuration according to the base station by high-level signaling, produces the sequence set numbering of SRS, and determines to send the required sign indicating number territory resource of SRS according to the sequence set numbering of the SRS that is produced.

2. according to the sending method of the described SRS of claim 1, it is characterized in that the sequence set of described SRS is numbered: the sequence set numbering of the demodulated reference signal (DMRS) of Physical Uplink Shared Channel (PUSCH) is numbered or be used for to the sequence set that is used for Physical Uplink Control Channel (PUCCH).

3. according to the sending method of the described SRS of claim 2, it is characterized in that the sequence set numbering of the described PUCCH of being used for draws in the following manner:

$u=(f_{\mathrm{gh}}\left(n_s\right)+f_{\mathrm{ss}}^{\mathrm{PUCCH}})\mathrm{mod}30$

Wherein, u represents to be used for the sequence set numbering of PUCCH, f _Gh(n _s) expression group redirect pattern,

The sequence displacement pattern of expression PUCCH, mod represents modulo operation.

4. according to the sending method of the described SRS of claim 3, it is characterized in that, described

Draw in the following manner:

$f_{\mathrm{ss}}^{\mathrm{PUCCH}}=(N_{\mathrm{ID}}^{\mathrm{cell}}\mathrm{mod}30+{\mathrm{\Δ}}_{\mathrm{ss}})\mathrm{mod}30$

Or $f_{\mathrm{ss}}^{\mathrm{PUCCH}}=(N_{\mathrm{ID}}^{\mathrm{cell}}\mathrm{mod}30+{\mathrm{\Δ}}_{\mathrm{SS}}^{\mathrm{SRS}})\mathrm{mod}30$

Wherein, Expression physical-layer cell identifier (ID), Δ _SsBe that high-level signaling is the offset parameter of PUSCH configuration, Δ _Ss∈ 0,1 ..., 29};

Be that high-level signaling is the offset parameter of SRS configuration,

5. according to the sending method of the described SRS of claim 3, it is characterized in that, described

Draw in the following manner:

$f_{\mathrm{ss}}^{\mathrm{PUCCH}}=({\mathrm{\Σ}}_{i=0}^{7}c(8n_s+i)\·2^i)\mathrm{mod}30$

Wherein, c (i) represents pseudo random sequence, n _sRepresent the time-gap number in the radio frames, use in the incipient stage of each radio frames

Pseudo-random sequence generator is carried out initialization, n _RNTIBe Radio Network Temporary Identifier, n _RNTIFor the base station is the proprietary parameter of user of UE configuration by high-level signaling.

6. according to the sending method of the described SRS of claim 3, it is characterized in that described f _Gh(n _s) draw in the following manner:

$f_{\mathrm{gh}}\left(n_s\right)=\left\{\begin{array}{c}0\\ ({\mathrm{\Σ}}_{i=0}^{7}c(8n_s+i)\·2^i)\mathrm{mod}30\end{array}\right.$

If the group redirect does not enable, then f _Gh(n _s) value be 0; If the group redirect enables, then f _Gh(n _s) value be

Wherein, c (i) represents pseudo random sequence, n _sRepresent the time-gap number in the radio frames.

7. according to the sending method of the described SRS of claim 1, it is characterized in that, described UE on the frequency domain resource before the base station sends SRS, this method also comprises:

Described base station according to received cooperation cell by the SRS resource occupation information that X2 interface sends over, the UE that disposes this base station affiliated subdistrict with nonoverlapping SRS frequency domain position of the SRS resource of cooperation cell or frequency comb on send SRS.

8. according to the sending method of the described SRS of claim 1, it is characterized in that, described UE on the frequency domain resource before the base station sends SRS, this method also comprises:

Described base station sends the SRS resource occupation information of this sub-district to cooperation cell by X2 interface.

9. according to the sending method of claim 7 or 8 described SRS, it is characterized in that this method further comprises:

The Physical Resource Block (PRB) of information word (IE) by an X2 interface SRS takies the proprietary parameter information of user of indication and/or IE item SRS, represents the resource occupation information of SRS.

10. according to the sending method of the described SRS of claim 9, it is characterized in that the PRB of described IE item SRS takies indication and comprises: the CoMP SRS indication of every PRB; The proprietary parameter information of user of described IE item SRS comprises: the CoMP SRS information indication that the user is proprietary.

11. the sending method according to each described SRS of claim 1 to 8 is characterized in that, the quantity of the transmission frequency comb of described SRS is 2,3 or 4.

12. the transmitting system of a SRS is characterized in that, this system comprises: UE and base station, wherein,

Described UE is used for sending SRS to the base station on time-domain resource, frequency domain resource and/or sign indicating number territory resource; Wherein, described time-domain resource comprises: last time-domain symbol of SRS cycle place subframe or first time-domain symbol or penult time-domain symbol; Described frequency domain resource comprises: the frequency domain position of SRS or the transmission frequency of SRS comb; Described sign indicating number territory resource obtains in the following manner: UE is the proprietary parameter of user of UE configuration according to the base station by high-level signaling, produces the sequence set numbering of SRS, and determines to send the required sign indicating number territory resource of SRS according to the sequence set numbering of the SRS that is produced;

Described base station is used for receiving the SRS that UE sends on time-domain resource, frequency domain resource and/or sign indicating number territory resource.

13. the transmitting system according to the described SRS of claim 12 is characterized in that, the sequence set of described SRS is numbered: the sequence set numbering of the DMRS of PUSCH is numbered or be used for to the sequence set that is used for PUCCH.

14. the transmitting system according to the described SRS of claim 13 is characterized in that, the sequence set numbering of the described PUCCH of being used for draws in the following manner:

$u=(f_{\mathrm{gh}}\left(n_s\right)+f_{\mathrm{ss}}^{\mathrm{PUCCH}})\mathrm{mod}30$

Wherein, u represents to be used for the sequence set numbering of PUCCH, f _Gh(n _s) expression group redirect pattern,

The sequence displacement pattern of expression PUCCH, mod represents modulo operation.

15. the transmitting system according to the described SRS of claim 14 is characterized in that, and is described

Draw in the following manner:

$f_{\mathrm{ss}}^{\mathrm{PUCCH}}=(N_{\mathrm{ID}}^{\mathrm{cell}}\mathrm{mod}30+{\mathrm{\Δ}}_{\mathrm{ss}})\mathrm{mod}30$

Or $f_{\mathrm{ss}}^{\mathrm{PUCCH}}=(N_{\mathrm{ID}}^{\mathrm{cell}}\mathrm{mod}30+{\mathrm{\Δ}}_{\mathrm{SS}}^{\mathrm{SRS}})\mathrm{mod}30$

Wherein,

Expression physical-layer cell identifier (ID), Δ _SsBe that high-level signaling is the offset parameter of PUSCH configuration, Δ _Ss∈ 0,1 ..., 29};

Be that high-level signaling is the offset parameter of SRS configuration,

16. the transmitting system according to the described SRS of claim 14 is characterized in that, and is described Draw in the following manner:

$f_{\mathrm{ss}}^{\mathrm{PUCCH}}=({\mathrm{\Σ}}_{i=0}^{7}c(8n_s+i)\·2^i)\mathrm{mod}30$

Wherein, c (i) represents pseudo random sequence, n _sRepresent the time-gap number in the radio frames, use in the incipient stage of each radio frames

Pseudo-random sequence generator is carried out initialization, n _RNTIBe Radio Network Temporary Identifier, n _RNTIFor the base station is the proprietary parameter of user of UE configuration by high-level signaling.

17. the transmitting system according to the described SRS of claim 14 is characterized in that, described f _Gh(n _s) draw in the following manner:

$f_{\mathrm{gh}}\left(n_s\right)=\left\{\begin{array}{c}0\\ ({\mathrm{\Σ}}_{i=0}^{7}c(8n_s+i)\·2^i)\mathrm{mod}30\end{array}\right.$

If the group redirect does not enable, then f _Gh(n _s) value be 0; If the group redirect enables, then f _Gh(n _s) value be

Wherein, c (i) represents pseudo random sequence, n _sRepresent the time-gap number in the radio frames.

18. transmitting system according to the described SRS of claim 12, it is characterized in that, described base station is further used for, described UE on the frequency domain resource before the base station sends SRS, according to received cooperation cell by the SRS resource occupation information that X2 interface sends over, the UE that disposes this base station affiliated subdistrict with nonoverlapping SRS frequency domain position of the SRS resource of cooperation cell or frequency comb on send SRS.

19. the transmitting system according to the described SRS of claim 12 is characterized in that, described base station is further used for, described UE on the frequency domain resource before the base station sends SRS, send the SRS resource occupation information of this sub-district to cooperation cell by X2 interface.

20. transmitting system according to claim 18 or 19 described SRS, it is characterized in that, the Physical Resource Block (PRB) of information word (IE) by an X2 interface SRS takies the proprietary parameter information of user of indication and/or IE item SRS, represents the resource occupation information of SRS.

21. the transmitting system according to the described SRS of claim 20 is characterized in that, the PRB of described IE item SRS takies indication and comprises: the CoMP SRS indication of every PRB; The proprietary parameter information of user of described IE item SRS comprises: the CoMP SRS information indication that the user is proprietary.

22. the transmitting system according to each described SRS of claim 12 to 19 is characterized in that, the quantity of the transmission frequency comb of described SRS is 2,3 or 4.

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