CN101384055A - Device and method for configuring uplink reference signal for channel measurement - Google Patents

Abstract

The invention relates to a method for treating SRS of a base station, which has the following steps: an SRS parameter of a subdistrict is configured by a system, and different cyclic shifts of fundamental sequence are configured for each transmission comb; a base station sends SRS configuration information to user equipment, and indication bits for configuring the transmission comb of the user equipment and the bits for indicating the cyclic shifts are include; and the base station detects the SRS of the user equipment.

Description

Configuration is used for the equipment and the method for the uplink reference signals of channel measurement

Technical field

The present invention relates to wireless communication system, relate to equipment and method that a kind of configuration in wireless communication system is used for the uplink reference signals of channel measurement in particular.

Background technology

Now, 3GPP standardization body has set about beginning its existing system standard is carried out long-term evolution (LTE).In the middle of numerous physical layer transmission technology, be the focus of research based on the downlink transfer technology of OFDM (OFDM) with based on the uplink technology that single-carrier frequency division multiple access inserts (SCFDMA).Two kinds of frame structures are arranged: i.e. Class1 frame structure (Type1 Frame Structure) and type 2 frame structures (Type 2 Frame Structure) in LTE.Two kinds of duplex modes of FDD and TDD are arranged in the Class1 frame structure, and have only TDD duplex mode in type 2 frame structures.

According to the discussion result of current LTE, Fig. 1 is the uplink frame structure of LTE Class1 FDD, and the time span of its radio frames (101～103) is all 10ms mutually with WCDMA; Each frame is subdivided into a plurality of time slots (104～107), and present hypothesis is that each radio frames comprises 20 time slots, and time slots length is 0.5ms; Each time slot comprises a plurality of SCFDMA symbols again.The CP of SCFDMA symbol has two kinds of length, promptly general CP (normal CP) and lengthening CP (extended CP), and the time span of general CP is approximately 4.7 μ s, the about 16.7 μ s of time span of lengthening CP.General CP time slot comprises 7 SCFDMA symbols, and lengthening CP time slot comprises 6 SCFDMA symbols.According to present discussion result, continuous two time slots constitute subframes (subframe), and Transmission Time Interval (TTI) is 1ms, equal the time span of a subframe.The sub-frame of uplink structure of LTE Class1 TDD is identical with the sub-frame of uplink structure of LTE Class1 FDD.

According to the discussion result of current LTE, Fig. 2 is the frame structure of LTE type 2TDD, and the time span of radio frames (201～203) is 10ms; Each frame is divided into the field (half-frame) (204,205) of two 5ms; Each field comprises 7 time slots (206～212) and three special territories, i.e. descending pilot frequency time slot (DwPTS) (213), protection be (GP) (214) and uplink pilot time slot (UpPTS) (215) at interval.And first time slot (206) and the DwPTS of each field are fixed for downlink transfer, and second time slot (207) of UpPTS and each field is fixed for uplink.Identical with the LTE Class1, each ascending time slot comprises a plurality of SCFDMA symbols, and the CP of SCFDMA symbol has two kinds of length, promptly general CP and lengthening CP, and general CP time slot comprises 9 SCFDMA symbols, and lengthening CP time slot comprises 8 SCFDMA symbols.According to present discussion result, each time slot is a subframe.

Fig. 3 is the signal processing of SCFDMA, transmitting terminal obtains its modulation symbol that need send (301) through certain processing, transform to frequency domain through DFT module (301), be mapped to the sub-carrier positions of system assignment then through subcarrier mapping block (303), next return time domain through IFFT module (304) conversion, then add CP (305), carry out follow-up operation then.Notice that in order to distinguish with the DFT operation of IFFT operation (304) and execution when receiving, the DFT operation of module (301) is called the Pre-DFT operation.

In the discussion of current LTE, propose a class and had a lot of well sequences of character, here be referred to as CAZAC (Constant Amplitude Zero Autocorrelation) sequence, this class sequence all has constant envelope in time domain and frequency domain, its circulation auto-correlation function is 0, and its Cyclic Cross-Correlation Transform function is a very little constant value.Obtain one group of sequence by same CAZAC sequence being carried out different cyclic shift (cyclic shift), this group sequence has good their cross correlation, thereby different user equipment allocation is used the different sequences in this group sequence.The number of available here cyclic shift value is subject to the length of sequence and the maximum multipath time delay of wireless channel.

Sequence with CAZAC character is widely used in the LTE system, especially at up direction, for example is used for the uplink reference signals (DM-RS) of data demodulates and is used for uplink reference signals (abbreviating CS-RS or SRS as) of channel measurement etc.According to the discussion result of current LTE, system bandwidth is divided a plurality of Resource Block (RB), and each RB comprises 12 subcarriers on frequency domain here.Number for the CAZAC sequence that guarantees to generate, the length of the CAZAC sequence that formula generates generally is prime number, and the sequence length that needs in the LTE uplink is an even number, promptly be 12 multiple, so need carry out cyclic extensions (extension) or brachymemma (truncation) to the CAZAC sequence that formula generates.Because length is that the number of the CAZAC sequence of N (N is a prime number) is N-1, and cubic metric (Cubic Metric) performance of the sequence that these CAZAC sequences obtain after expansion or brachymemma is bad, cause sequence length more in short-term, the number of available CAZAC sequence is fewer.Therefore according to the discussion result of current LTE, length is 3 times and produces to RB subcarrier number (promptly 36) or the longer CAZAC sequence method by formula and cyclic extensions, and the sequence that length is equivalent to the subcarrier number (promptly 12) of a RB and the subcarrier number that length is equivalent to two RB (promptly 24) is obtained by computer search, the sequence of these search should have the character that is similar to desirable CAZAC sequence.

In order to support scheduling to uplink channel resources, particularly support the scheduling of upstream frequency selectivity, need subscriber equipment to send SRS at up direction, the up channel situation of each subscriber equipment is estimated according to SRS in the base station, thereby finishes scheduling of resource.According to the discussion result of current LTE to SRS, the bandwidth of SRS has multiple, and the bandwidth of the SRS that can configure user equipment sends of base station.Fig. 4 is the schematic diagram of SRS multiplexing structure in the LTE system, repetition factor (RPF) when SRS transmits in a SCFDMA symbol equals 2, resource in such SCFDMA symbol is divided into two transmission combs (transmission comb) according to the mode of frequency division multiple access (FDMA), and is called comb 0 (401) and comb 1 (402).In each transmission comb, the sub-band that system bandwidth is divided into a plurality of local formulas is respectively applied for the transmitting SRS signal, as the SRS bandwidth on the comb among Fig. 40 (403 and 404).In the sub-band of each local formula, system can dispose the mode transmitting SRS of a plurality of subscriber equipmenies with CDMA, and the mode of realization CDMA is based on the sequence of the same CAZAC of having character and the value of a plurality of cyclic shifts obtains a plurality of sequences.The base station can be configured in the SRS signal multiplexing of two kinds of different bandwidths in different transmission combs, and for example in Fig. 4, the SRS bandwidth on the comb 0 (403 and 404) is different with SRS bandwidth (405) on the comb 1.In sum, when the SRS transmission is carried out at configure user equipment in the base station, need to set the SRS transmission cycle, subframe that SRS takies and SCFDMA symbol, the transmission comb that SRS takies, the bandwidth of SRS and frequency original position, the basic CAZAC sequence that SRS uses and the value of cyclic shift etc.According to the discussion result of LTE, the index of SRS sequence obtains by the sequence index of the Physical Uplink Control Channel (PUCCH) of this sub-district.What this patent solved is exactly the problem of distributing the value of SRS sequence and cyclic shift thereof rationally.

Summary of the invention

The purpose of this invention is to provide equipment and method that a kind of configuration in wireless communication system is used for the uplink reference signals of channel measurement.

According to an aspect of of the present present invention, the method for a kind of base station treatment S RS comprises the steps:

A) the SRS parameter of system configuration sub-district is included as the different cyclic shift that each transmission comb disposes basic sequence;

B) base station sends the SRS configuration information to subscriber equipment, comprises the indication bit and the bit of indicating cyclic shift of the transmission comb of distributing user equipment;

C) SRS of subscriber equipment is detected in the base station.

According to another aspect of the present invention, the method for a kind of subscriber equipment treatment S RS comprises the steps:

A) subscriber equipment obtains the set that each transmission comb uses the cyclic shift of basic sequence;

B) subscriber equipment receives the configuration information of base station to its SRS;

C) subscriber equipment sends SRS.

According to another aspect of the present invention, the equipment of a kind of base station treatment S RS comprises:

A) circular shift information controller module is used to generate the configuration information that the available cycles on each transmission comb is shifted;

B) SRS configuration information controller module is used to generate the SRS configuration information to a subscriber equipment

C) SRS detector module is used to measure the up channel state of subscriber equipment.

According to another aspect of the present invention, the equipment of a kind of subscriber equipment treatment S RS comprises:

A) circular shift information parser modules is used to obtain the set of the available cycles displacement on each transmission comb;

B) SRS configuration information parser modules is used to obtain the configuration information of base station to its SRS

C) SRS maker module is used for generating SRS according to the configuration information of base station.

According to another aspect of the present invention, a kind of method that disposes SRS comprises the steps:

A) system configuration SRS parameter is included as each transmission comb configuration and uses different basic sequences;

B) base station sends the SRS configuration information to subscriber equipment;

C) subscriber equipment receives the configuration information of base station to SRS, and sends SRS.

Description of drawings

Fig. 1 is the uplink frame structure of LTE Class1 FDD;

Fig. 2 is the frame structure of LTE type 2;

Fig. 3 is a SCFDMA Signal Processing process;

Fig. 4 is the multiplexing structure of SRS;

Fig. 5 is the equipment drawing of base station treatment S RS;

Fig. 6 is the equipment drawing of subscriber equipment treatment S RS.

Embodiment

The present invention discuss when RPF more than or equal to 1 the time, a plurality of subscriber equipmenies of base station configuration send the method for SRS in up symbol, the value of note RPF is N _RPFThe present invention is the transmission technology that adopted of restriction system up direction not, and promptly up symbol can be SCFDMA symbol or OFDM symbol etc.Especially, according to the discussion result of present LTE system, up symbol is the SCFDMA symbol, and the value of RPF is fixed as 2.Like this, system is at the N of up symbol _RPFAdopt the SRS of the multiplexing a plurality of subscriber equipmenies of mode of FDMA on the individual transmission comb, here, the bandwidth of the SRS on the different transmission combs can be identical, also can be different.In a transmission comb, system bandwidth can be divided into the sub-band of a plurality of local formulas, and the bandwidth of the sub-band of these local formulas can equate also can not wait; In the sub-band of each local formula, system can dispose the mode transmitting SRS of a plurality of subscriber equipmenies with CDMA, in the LTE system, the mode of realization CDMA is based on the basic sequence of the same CAZAC of having character and the value of a plurality of cyclic shifts obtains a plurality of sequences.The basic sequence with CAZAC character here can be based on the formula generation, also can obtain by the computer search.

In order to reduce the SRS interference between signals of subscriber equipment as much as possible, the present invention proposes two kinds of solutions, be described respectively below.

Scheme one: the different cyclic shift of configuration on the different transmission combs

Because the SRS sequence is by basic sequence is carried out the sequence that cyclic shift obtains, in order to reduce interference, system is when configuration SRS, the value of the different cyclic shift of configuration on different transmission combs does not limit the basic sequence that is disposed on the different transmission combs and is identical or different here.The number of the available cycles displacement that the note system disposes on each transmission comb is

Then the bit number of base station indication cyclic shift value of needs when being a user device configuration SRS is $\mathrm{ceil}\left({\log }_2\left(N_{\mathrm{shift}}^{\mathrm{comb}}\right)\right).$

In the LTE system, SRS can have multiple different bandwidth, and corresponding, basic sequence can have multiple different length, and obviously the number of the possible cyclic shift of the basic sequence of different length is different.Usually, the length of remembering the basic sequence of certain bandwidth is L, and then the number of its available cyclic shift also is L.When basic sequence is when generating by cyclic extensions, the length of the CAZAC sequence before the note cyclic extensions is L _C, then the number of its available cyclic shift is L _C

The number of cyclic shift that can be simultaneously multiplexing on transmission comb depends on temporal extension and other disturbing factors of channel.For example, for the very big SRS of bandwidth, the length of its basic sequence is very long, and the number of available cyclic shift is a lot, but in fact has only seldom a part of cyclic shift really to use in system.

A kind of method of determining the available cycles displacement on each transmission comb is described below, and the present invention does not limit the method for determining the available cycles displacement on each transmission comb.The available cycles displacement of note basic sequence add up to L _B, a number of transmitting the available cycles displacement on the comb is

Then formula is satisfied in k each available cycles displacement of transmitting on the comb

The formula of another possible configuration available cycles displacement is $s_i^k=\mathrm{round}(i\·\frac{L_B}{N_{\mathrm{shift}}^{\mathrm{comb}}})+o_k;$ Here, k=0,1 ... N _RPF-1, $i=\mathrm{0,1},...N_{\mathrm{shift}}^{\mathrm{comb}}-1,$

Note working as L _BCan divide exactly

The time, top simplified formula is $s_i^k=i\·\frac{L_B}{N_{\mathrm{shift}}^{\mathrm{comb}}}+o_k.$ Here, the offset parameter o of different transmission comb configuration _kDifference, and o _kSetting should guarantee the difference maximums of the available cycles displacement of different transmission combs configuration.o _kSatisfy formula

Perhaps satisfy formula $o_k=\mathrm{round}(k\·\frac{N_o}{N_{\mathrm{RPF}}})+c,$ Here

Note, to being L by length _CThe length that obtains through cyclic extensions of CAZAC sequence be the basic sequence of L, system still can be according to L _BFormula above=L uses calculates the available cycles displacement, and the present invention does not limit this.

The base station can send the configuration information to the available cycles displacement in broadcast channel, in the LTE system, this information generally is to send in Dynamic Broadcast Channel (D-BCH).

The method of first kind of transmission available cycles displacement information is the bandwidth to each SRS, is each transmission comb, and system sends the numerical value of its operable each cyclic shift respectively, and the signaling consumption that this method needs is bigger.

The method of second kind of transmission available cycles displacement information is the bandwidth to each SRS, system sends the numerical value of each cyclic shift of transmission comb configuration, and send the increment of the value of other cyclic shifts of transmitting combs, thereby can calculate the value of actual available cycles displacement with respect to the cyclic shift of this transmission comb.For example, suppose that RPF equals 2, to some SRS bandwidth, the value of the cyclic shift that the note system disposes on a transmission comb is $s_i^0,i=\mathrm{0,1},...N_{\mathrm{shift}}^{\mathrm{comb}}-1,$ And increment is a, then the value of the available cycles displacement on another transmission comb $s_i^1=s_i^0+a,i=\mathrm{0,1},...N_{\mathrm{shift}}^{\mathrm{comb}}-1.$

The third method that sends available cycles displacement information is the ratio according to the SRS bandwidth, determines the ratio of the cyclic shift of its use; To a specific SRS bandwidth, system sends the numerical value of each cyclic shift of transmission comb configuration, and sends the increment of the value of other cyclic shifts of transmitting combs with respect to the cyclic shift on this transmission comb; Thereby the value that the available cycles that can calculate the reality of each SRS bandwidth is shifted.For example, suppose that RPF equals 2, to minimum SRS bandwidth, the value of the cyclic shift that the note system disposes on a transmission comb is $s_i^0,i=\mathrm{0,1},...N_{\mathrm{shift}}^{\mathrm{comb}}-1,$ And increment is a, then the value of the available cycles displacement on another transmission comb $s_i^1=s_i^0+a,i=\mathrm{0,1},...N_{\mathrm{shift}}^{\mathrm{comb}}-1.$ To bandwidth is minimum SRS bandwidth b SRS doubly, and the value of the cyclic shift of two transmission comb configuration is With

$i=\mathrm{0,1},...N_{\mathrm{shift}}^{\mathrm{comb}}-1.$

The 4th kind of method that sends available cycles displacement information is that system sends the sum that a transmission comb disposes the cyclic shift of using

And respectively every kind of SRS bandwidth is sent the offset parameter o that each transmits comb _kThereby, according to formula

Perhaps $s_i^k=\mathrm{round}(i\·\frac{L_B}{N_{\mathrm{shift}}^{\mathrm{comb}}})+o_k$ Calculate the value of available cycles displacement of the reality of each SRS bandwidth.

The 5th kind of method that sends available cycles displacement information is that system sends the sum that a transmission comb disposes the cyclic shift of using

And respectively each SRS bandwidth is sent definite offset parameter o _kParameter c, thereby according to formula

Perhaps $s_i^k=\mathrm{round}(i\·\frac{L_B}{N_{\mathrm{shift}}^{\mathrm{comb}}})+o_k$ Calculate the value of available cycles displacement of the reality of each SRS bandwidth, here o _kSatisfy formula

Perhaps $o_k=\mathrm{round}(k\·\frac{N_o}{N_{\mathrm{RPF}}})+c,$

The 6th kind of method that sends available cycles displacement information is that system sends the sum that a transmission comb disposes the cyclic shift of using

And transmission is determined offset parameter o to a specific SRS bandwidth _kParameter c, and determine o when obtaining other SRS bandwidth according to the ratio of SRS bandwidth _kParameter c.Thereby according to formula

Perhaps $s_i^k=\mathrm{round}(i\·\frac{L^B}{N_{\mathrm{shift}}^{\mathrm{comb}}})+o^k$ Calculate the value of available cycles displacement of the reality of each SRS bandwidth, here o _kSatisfy formula

Perhaps $o_k=\mathrm{round}(k\·\frac{N_o}{N_{\mathrm{RPF}}})+c,$

The 7th kind of method that sends available cycles displacement information is that system sends the sum that a transmission comb disposes the cyclic shift of using

And each SRS bandwidth of predefine be used for determining offset parameter o _kParameter c, for example can equal 0 by predefine c.Thereby according to formula

Perhaps $s_i^k=\mathrm{round}(i\·\frac{L_B}{N_{\mathrm{shift}}^{\mathrm{comb}}})+o_k$ Calculate the value of available cycles displacement of the reality of each SRS bandwidth, here o _kSatisfy formula

Perhaps $o_k=\mathrm{round}(k\·\frac{N_o}{N_{\mathrm{RPF}}})+c,$

System can predefine the set of operable cyclic shift on each transmission comb, need in broadcast channel, not send this configuration information like this.A kind of predefined method is the sum of the cyclic shift of a transmission of predefine comb configuration use

With definite offset parameter o _kParameter c.Thereby according to formula

Perhaps $s_i^k=\mathrm{round}(i\·\frac{L_B}{N_{\mathrm{shift}}^{\mathrm{comb}}})+o_k$ Calculate the value of available cycles displacement of the reality of each SRS bandwidth, here o _kSatisfy formula

Perhaps $o_k=\mathrm{round}(k\·\frac{N_o}{N_{\mathrm{RPF}}})+c,$

Here With parameter c can be different to general CP frame structure and lengthening CP frame structure.

System also can define multiple With the combination of parameter c, and it is carried out index.Like this, system can send this index value in broadcast channel (being in D-BCH) in LTE.

Also can utilize according to sub-district ID and determine what adopted this sub-district with parameter c by implicit the determining of other system parameter

And parameter c.

According to the method above the present invention, system configuration the value of each transmission available cyclic shift on comb.Mapping relations can be fixed like this, i.e. the fixing value of using some cyclic shift of transmission comb; In addition, on the up symbol of different transmission SRS signals, system can change the mapping relations that available cycles is displaced to the transmission comb.For example, when RPF equals 2, on the up symbol of even number position, directly use the value of the cyclic shift of configuration, and on the up symbol of odd positions, exchange the value of the cyclic shift of two transmission combs at each transmission comb.

Adopt above-describedly by broadcast channel configuration or predefined method, system is different cyclic shift of each transmission comb configuration use basic sequence.Then, need send the subscriber equipment of SRS to each, the base station sends its SRS configuration information, comprises the indication bit and the ratio top grade of indicating cyclic shift of the transmission comb of distributing user equipment.The set of the available cycles displacement of a transmission comb of note system configuration is A, and the bit of then indicating cyclic shift is the index of the cyclic shift in the pair set A.Next, the SRS of subscriber equipment is detected in the base station on the SRS resource of configuration.

Subscriber equipment receives the information of the cyclic shift of each the transmission comb configuration use basic sequence in the broadcast channel, perhaps obtain the information that each transmission comb uses the cyclic shift of basic sequence, obtain the set that each transmission comb uses the cyclic shift of basic sequence based on predefined parameter; Subscriber equipment receives the configuration information of base station to its SRS then, obtains disposing the parameters such as cyclic shift of its use according to the indication bit of the transmission comb of its distribution and the bit of indication cyclic shift, and sends SRS.

Be the equipment drawing of base station treatment S RS as shown in Figure 5, wherein circular shift information controller module (501) and SRS configuration information controller module (502) are embodiments of the present invention.At first the base station generates the configuration information that the available cycles of SRS on each transmission comb is shifted in module 501, and is multiplexed in the broadcast channel by physical channel multiplexer module (503); Need send the subscriber equipment of SRS then to each, module 502 generates the SRS configuration information of this subscriber equipment, and multiplexing by module 503; The multiplexed signals of module 503 outputs sends by sending and receiving device module (504).Next, the base station obtains the SRS of subscriber equipment by the signal of module 504 reception subscriber equipmenies through physical channel demodulation multiplexer module (505) demultiplexing, and measures the up channel state of subscriber equipment in SRS detector module (506).

Be the equipment drawing of subscriber equipment treatment S RS as shown in Figure 6, wherein circular shift information parser modules (601) and SRS configuration information parser modules (602) are embodiments of the present invention.At first subscriber equipment receives signal of base station through sending and receiving device module (604), goes out broadcast message through physical channel demodulation multiplexer module (603) demultiplexing, and resolves the set that obtains the available cycles displacement on each transmission comb in module 601; Through module 603 demultiplexings, in module 602, resolve and obtain the base station its SRS configuration information.Next, subscriber equipment is at the configuration information generation SRS of SRS maker (606) module according to the base station, and is multiplexing through physical channel multiplexer module (605), and sends by module 604.

Scheme two: the different basic sequence of configuration on the different transmission combs

Because the SRS sequence is by basic sequence is carried out the sequence that cyclic shift obtains, in order to reduce EVAC (Evacuation Network Computer Model) when disposing SRS, the different basic sequence with CAZAC character of configuration on different transmission combs does not limit the cyclic shift that is disposed on the different transmission combs and is identical or different here.Specifically, to one SRS bandwidth, system configuration transmission comb k goes up and uses basic sequence C _k, k=0 here, 1 ... N _RPF-1.The C here _kIt is the basic sequence that satisfies this SRS bandwidth with CAZAC character.

To the LTE system, according to current discussion, the basic sequence with CAZAC character is divided into a plurality of groups, comprises one or more basic sequence in each group, and system can dispose the basic sequence that certain group is used in a sub-district.The number of the basic sequence in every group is more than or equal to N _RPFThe time, can be simply the N in the group _RPFIndividual basic sequence is configured in N respectively ^RPFUse on the individual transmission comb.Basic sequence number in every group is less than N _RPFThe time, a kind of method be defined in the sub-district can only the using system configuration one group of basic sequence, at this moment allow the SRS on the some or all of transmission comb to use identical basic sequence.Basic sequence number in every group is less than N _RPFThe time, another kind of method is to be defined in the sub-district to use a plurality of groups basic sequence, thereby guarantees the different basic sequences that use on the combs that transmit.For example, work as N _RPFEqual 2, and each group is when having only a basic sequence, a kind of method is that two transmission combs all use this basic sequence; Another kind method is interior basic sequence and basic sequence that other groups are interior of group that two transmission of configuration comb uses respectively to distribute to this sub-district.For example, the note basic sequence is divided into the M group, and keeps the score and join the basic sequence that the m group is used in this sub-district, then works as N _RPFEqual 2, use the basic sequence of this m group on the system configuration comb 0, and use mod on the configuration comb 1 (m+n, M) Zu basic sequence, m=0 here, 1 ... M-1, n are integers, and n=1 ... M-1.

The base station can send the configuration information to the basic sequence of SRS in broadcast channel, in the LTE system, this information generally is to send in Dynamic Broadcast Channel (D-BCH).

Embodiment

This part has provided two embodiment of this invention, and is too tediously long for fear of the description that makes this patent, in the following description, omitted the detailed description of function that the public is known or device etc.

First embodiment

An example of the present invention's different cyclic shifts of configuration basic sequence on difference transmission comb is described in the present embodiment.Here be example with the LTE system, the bandwidth of supposing SRS is 6 RB, i.e. 72 subcarriers are because the RPF of SRS equals 2, so the length of the basic sequence of SRS is 36.Be subjected to the influence of the factors such as temporal extension of channel, suppose on each transmission comb to be 6 with the number of the simultaneously multiplexing subscriber equipment of the mode of CDMA here, promptly the number of the cyclic shift of using simultaneously on comb is 6.

According to formula $s_i^k=i\·\frac{L_B}{N_{\mathrm{shift}}^{\mathrm{comb}}}+o_k$ Calculate the value of the cyclic shift of each transmission comb configuration use, L _BEqual 36,

Equal 6, o _kBy formula

Determine, suppose further that here c equals 0, wherein N _oEqual 6, N _RPFEqual 2.As shown in table 1, be the value of the cyclic shift used on comb of each transmission of system configuration.Here, the corresponding cyclic shift of " √ " expression is used on a transmission comb.The value of the cyclic shift that configuration is used on the comb 0 is 0,6,12,18,24 and 30; The value of the cyclic shift that configuration is used on the comb 1 is 3,9,15,21,27 and 33.

Table 1: the cyclic shift of each transmission comb configuration

Second embodiment

Another example of the present invention's different cyclic shifts of configuration basic sequence on difference transmission comb is described in the present embodiment.Here be example with the LTE system, the bandwidth of supposing SRS is 6 RB, i.e. 72 subcarriers are because the RPF of SRS equals 2, so the length of the basic sequence of SRS is 36.Here suppose further that length is that 36 basic sequence is by being that 31 CAZAC sequence obtains through cyclic extensions to length, so in fact the number of the available cycles of basic sequence expansion is 31.Be subjected to the influence of the factors such as temporal extension of channel, suppose on each transmission comb to be 6 with the number of the simultaneously multiplexing subscriber equipment of the mode of CDMA here, promptly the number of the cyclic shift of using simultaneously on comb is 6.

According to formula

Calculate the value of the cyclic shift of each transmission comb configuration use, L _BEqual 31,

Equal 6, o _kBy formula

Determine, suppose that here c equals 0, wherein N _oEqual 5, N _RPFEqual 2.As shown in table 2, be the value of the cyclic shift used on comb of each transmission of system configuration.Here, the corresponding cyclic shift of " √ " expression is used on a transmission comb.The value of the cyclic shift that configuration is used on the comb 0 is 0,5,10,15,20 and 25; The value of the cyclic shift that configuration is used on the comb 1 is 2,7,12,17,22 and 27.

Table 2: the cyclic shift of each transmission comb configuration

Claims (30)

1. the method for a base station treatment S RS comprises the steps:

A) the SRS parameter of system configuration sub-district is included as the different cyclic shift that each transmission comb disposes basic sequence;

B) base station sends the SRS configuration information to subscriber equipment, comprises the indication bit and the bit of indicating cyclic shift of the transmission comb of distributing user equipment;

C) SRS of subscriber equipment is detected in the base station.

2. method according to claim 1 is characterized in that in step a), the different identical basic sequences of transmission comb configuration.

3. method according to claim 1 is characterized in that in step a), the different different basic sequences of transmission comb configuration.

4. method according to claim 1 is characterized in that in step a), and formula is satisfied in k each available cycles displacement of transmitting on the comb

Here, L _BBe the sum of the available cycles displacement of basic sequence,

Be the number of an available cycles displacement on the transmission comb, o _kIt is the deviant of the cyclic shift of each transmission comb configuration.

5. method according to claim 1 is characterized in that in step a), and formula is satisfied in k each available cycles displacement of transmitting on the comb $s_i^k=\mathrm{round}(i\·\frac{L_B}{N_{\mathrm{shift}}^{\mathrm{comb}}})+o_k,$ Here, L _BBe the sum of the available cycles displacement of basic sequence,

Be the number of an available cycles displacement on the transmission comb, o _kIt is the deviant of the cyclic shift of each transmission comb configuration.

6. according to claim 4 or 5 described methods, it is characterized in that offset parameter o ^kSatisfy formula Perhaps satisfy formula $o_k=\mathrm{round}(k\·\frac{N_o}{N_{\mathrm{RPF}}})+c,$ Here

7. method according to claim 1 is characterized in that in step a), and the base station can send the configuration information to the available cycles displacement in broadcast channel, and in the LTE system, this configuration information sends in Dynamic Broadcast Channel (D-BCH).

8. method according to claim 7 is characterized in that, to the bandwidth of each SRS, is each transmission comb, and system sends the numerical value of its operable each cyclic shift respectively.

9. method according to claim 7, it is characterized in that, to the bandwidth of each SRS, system sends the numerical value of each cyclic shift of transmission comb configuration, and sends the increment of the value of other cyclic shifts of transmitting combs with respect to the cyclic shift on this transmission comb.

10. method according to claim 7 is characterized in that,

According to the ratio of SRS bandwidth, determine the ratio of the cyclic shift of its use;

To a specific SRS bandwidth, system sends the numerical value of each cyclic shift of transmission comb configuration, and sends the increment of the value of other cyclic shifts of transmitting combs with respect to the cyclic shift on this transmission comb.

11. method according to claim 7 is characterized in that, system sends the sum of the cyclic shift of a transmission comb configuration use, and respectively every kind of SRS bandwidth is sent the offset parameter of each transmission comb.

12. method according to claim 7 is characterized in that, system sends the sum of the cyclic shift of a transmission comb configuration use, and respectively offset parameter o is determined in each SRS bandwidth transmission _kFormula in parameter c.

13. method according to claim 7 is characterized in that, system sends a transmission comb and disposes the sum of the cyclic shift of using and a specific SRS bandwidth is determined offset parameter o _kParameter c, thereby determine o when obtaining other SRS bandwidth according to the ratio of SRS bandwidth _kParameter c.

14. method according to claim 7 is characterized in that, system sends the sum of the cyclic shift that the configuration of a transmission comb uses, and each SRS bandwidth of predefine be used for determining offset parameter o _kFormula in parameter c.

15. method according to claim 14 is characterized in that parameter c equals 0.

16. method according to claim 7 is characterized in that system definition is multiple

With the combination of parameter c, and it is carried out index, thereby in broadcast channel, send this index value.

17. method according to claim 1 is characterized in that in step a), the set of operable cyclic shift on each transmission comb of system's predefine.

18. method according to claim 17 is characterized in that, sum and definite o of the cyclic shift that the configuration of a transmission of predefine comb is used _kFormula in parameter c.

19. method according to claim 18 is characterized in that,

Is different to general CP frame structure with lengthening CP frame structure with parameter c.

20. method according to claim 1 is characterized in that in step b), the number of the available cycles displacement that the note system disposes on each transmission comb is

Then the base station at the bit number of indication cyclic shift value is $\mathrm{ceil}\left({\log }_2\left(N_{\mathrm{shift}}^{\mathrm{comb}}\right)\right).$

21. the method for a subscriber equipment treatment S RS comprises the steps:

A) subscriber equipment obtains the set that each transmission comb uses the cyclic shift of basic sequence;

B) subscriber equipment receives the configuration information of base station to its SRS;

C) subscriber equipment sends SRS.

22. method according to claim 1 is characterized in that in step a), obtains the cyclic shift that each transmission comb uses basic sequence by receiving broadcast channel.

23. method according to claim 1 is characterized in that in step a), obtains the cyclic shift that each transmission comb uses basic sequence based on predefined parameter.

24. method according to claim 1 is characterized in that in step b), obtains disposing the cyclic shift of its use according to the indication bit of the transmission comb of its distribution and the bit of indication cyclic shift.

25. the equipment of a base station treatment S RS comprises:

A) circular shift information controller module is used to generate the configuration information that the available cycles on each transmission comb is shifted;

B) SRS configuration information controller module is used to generate the SRS configuration information to a subscriber equipment

C) SRS detector module is used to measure the up channel state of subscriber equipment.

26. the equipment of a subscriber equipment treatment S RS comprises:

A) circular shift information parser modules is used to obtain the set of the available cycles displacement on each transmission comb;

B) SRS configuration information parser modules is used to obtain the configuration information of base station to its SRS

C) SRS maker module is used for generating SRS according to the configuration information of base station.

27. a method that disposes SRS comprises the steps:

A) system configuration SRS parameter is included as each transmission comb configuration and uses different basic sequences;

B) base station sends the SRS configuration information to subscriber equipment;

C) subscriber equipment receives the configuration information of base station to SRS, and sends SRS.

28. method according to claim 27 is characterized in that in step a) the number of the basic sequence in the group of each basic sequence is more than or equal to N _RPFThe time, N wherein _RPFIndividual basic sequence is configured in respectively is configured in N _RPFUse on the individual transmission comb.

29. method according to claim 27 is characterized in that in step a) the number of the basic sequence in the group of each basic sequence is less than N _RPFThe time, in a sub-district, use a plurality of groups basic sequence.

30. method according to claim 27 is characterized in that in step a), the base station can send the configuration information to the basic sequence of SRS in broadcast channel, and in the LTE system, this information sends in Dynamic Broadcast Channel (D-BCH).

Images