CN103037521B

CN103037521B - Up-going reference mark signal realizing method in time division synchronization code division multiple access (TD-SCDMA) system

Info

Publication number: CN103037521B
Application number: CN201210532084.4A
Authority: CN
Inventors: 范晨; 沈东栋; 王大飞; 李蓉; 贺刚; 陈迎
Original assignee: TD Tech Ltd
Current assignee: TD Tech Ltd
Priority date: 2009-01-19
Filing date: 2009-01-19
Publication date: 2015-05-20
Anticipated expiration: 2029-01-19
Also published as: CN103037521A

Abstract

The invention discloses an up-going reference mark signal (sounding RS and SRS) realizing method in a time division synchronization code division multiple access (TD-SCDMA) system. The realizing method comprises the steps that a network side configures SRS resource information for user equipment user experience (UE), the configured SRS resource information is informed to the UE, and the UE sends the SRS according to the SRS resource information. According to the technical scheme, sending of the SRS can be achieved in the TD-SCDMA system.

Description

Method for realizing uplink reference symbol in TD-SCDMA system

Technical Field

The invention relates to a mobile communication technology, in particular to an uplink reference symbol implementation method in a time division synchronous code division multiple access (TD-SCDMA) system.

Background

In a mobile communication system, in order to implement high-speed data transmission, a High Speed Packet Access (HSPA) technology is introduced, which includes a High Speed Downlink Packet Access (HSDPA) technology and/or a High Speed Uplink Packet Access (HSUPA) technology.

The HSUPA includes four Physical channels, namely an enhanced dedicated Channel (E-DCH) Physical Uplink Channel (E-PUCH, E-DCH Physical Uplink Channel), an E-DCH Absolute Grant Channel (E-AGCH, E-DCH Absolute Grant Channel), an E-DCH Hybrid automatic repeat indicator Channel (E-HICH, E-DCH Hybrid indicator Channel), and an E-DCH random access Uplink Control Channel (E-RUCCH, E-DCH random access Uplink Control Channel).

In an Uplink (UL) physical layer of a Long Term Evolution (LTE) system, there are two types of Reference Symbols (RS), namely, Demodulation Reference symbols (DM RS) and uplink Reference symbols (SRS). According to 3GPP standard Release 7 to Release8, as known from HSPA and SAE/LTE, DM RS is mainly used for channel estimation of physical channels such as PUSCH or PUCCH, and is transmitted along with data when transmitting, and a base station (Node B) performs channel estimation according to DM RS uploaded by User Equipment (UE) to assist data demodulation. The SRS is mainly used for measuring the quality of an uplink signal, and is transmitted separately during transmission, and a base station (NodeB) may perform channel estimation according to SRS information uploaded by the UE, and perform physical layer resource configuration again according to a channel estimation result, so as to ensure the service quality of a service.

In TD-SCDMA system, the symbol for uplink channel estimation is carried in Midamble (Midamble) field transmitted along with data, i.e. the symbol is transmitted along with data, i.e. it is equivalent to MD RS in LTE system. It can be seen that, in the current TD-SCDMA system, there is no situation that a symbol for uplink channel estimation is carried in a Midamble domain for separate transmission, that is, there is no SRS, and certainly, there is no implementation scheme for the SRS. Considering that for the TD-SCDMA system, the SRS can be used for not only uplink channel estimation but also downlink beamforming accuracy based on reciprocity of uplink and downlink channels. For example, by alternately transmitting SRS on two antennas of the UE, the base station (Node B) can perform channel estimation from the two antennas of the UE to each receiving antenna of the base station (Node B), and thus can assist downlink Multiple Input Multiple Output (MIMO) single/dual stream selection and dual stream Beamforming (Beamforming precoding). Therefore, how to implement SRS on TD-SCDMA system is a problem that needs to be solved urgently at present.

Disclosure of Invention

In view of this, the present invention provides a method for implementing SRS in TD-SCDMA system, so as to implement SRS transmission in TD-SCDMA system.

The SRS realizing method in the TD-SCDMA system provided by the invention comprises the following steps:

A. a network side configures SRS resource information for User Equipment (UE) and notifies the configured SRS resource information to the UE;

B. and the UE transmits the SRS according to the SRS resource information.

Preferably, the step a includes: configuring SRS resource information comprising one or more one-to-one correspondence relations between SRS and set uplink channels for UE of a current cell by taking the cell as a unit and a network side, and notifying the SRS resource information to the UE of the current cell;

the step B comprises the following steps: and the UE which calls a certain set uplink channel currently binds and transmits the SRS which has one-to-one correspondence with the set uplink channel when transmitting the set uplink channel according to the resource information.

Preferably, the step a further comprises: the base station reports the available SRS information to the RNC;

the network side configures SRS resource information including one or more SRS corresponding relations between a set uplink channel and a set uplink channel for the UE of the current cell, and the step of informing the UE of the current cell of the SRS resource information comprises the following steps: the RNC at the network side configures SRS resource information comprising one-to-one correspondence of more than one SRS and a set uplink channel for the UE of the current cell according to the information of the available SRS, and notifies the SRS resource information to the UE of the current cell through broadcast messages or special signaling;

the step A and the step B further comprise the following steps: the RNC informs a base station at a network side of the SRS resource information;

after the step B, further comprising: and the base station receives the SRS which is sent by the current UE and bound with the set uplink channel according to the SRS resource information.

Preferably, the sending the SRS in one-to-one correspondence with the set uplink channel by binding with the set uplink channel includes: when more than two uplink time slots exist in the current transmission time interval TTI used for transmitting the set uplink channel, transmitting the SRS which has one-to-one correspondence with the set uplink channel on the time slots except the time slot for transmitting the set uplink channel; otherwise, the SRS with one-to-one correspondence relation with the set uplink channel is transmitted in the TTI immediately before or after the current TTI.

Preferably, the sending the SRS, which has a one-to-one correspondence relationship with the set uplink channel, on the time slot other than the time slot for sending the set uplink channel includes:

when the set uplink channel is transmitted in a non-sixth time slot TS6, the SRS which has a one-to-one correspondence with the set uplink channel is transmitted in a time slot after the set uplink channel; when the set uplink channel is transmitted in TS6, the SRS having a one-to-one correspondence relationship with the set uplink channel is transmitted in a time slot before the set uplink channel.

Preferably, the setting the uplink channel includes: shared information channel HS-SICH of high speed down shared channel.

Preferably, the UE comprises two antennas;

the transmitting the SRS includes: and respectively transmitting the set uplink channel and the corresponding SRS on two antennas.

Preferably, the method further comprises:

the network side sends a transmission power control TPC for controlling the power of the SRS and/or a synchronous deviation SS for synchronizing the SRS to the UE;

the UE performs power control and/or synchronization on the transmitted SRS according to the received TPC and/or SS.

Preferably, the sending the TPC for power controlling the SRS and/or the SS for synchronizing the SRS includes:

transmitting the TPC for power control of the SRS and/or the SS for synchronization of the SRS by using an independent enhanced dedicated channel hybrid automatic repeat indicator channel (E-HICH); or,

transmitting the TPC for power control of the SRS and/or the SS for synchronization of the SRS by using the E-HICH multiplexed with scheduling transmission; or,

and transmitting the TPC for power control of the SRS and/or the SS for synchronization of the SRS by utilizing the E-HICH multiplexed with the non-scheduled transmission.

Preferably, the transmitting the TPC for power controlling the SRS and/or the SS for synchronizing the SRS using a separate E-HICH includes:

dividing the 80 signature sequences of the E-HICH into set M groups, and utilizing the signature sequences of each groupThe TPC used for controlling the power of the SRS and/or the SS used for synchronizing the SRS are carried by the signature sequences.

Preferably, the sending the TPC used for power control of the SRS and/or the SS used for synchronization of the SRS by using the E-HICH multiplexed with the scheduled transmission includes:

grouping the 80 signature sequences of the E-HICH according to a grouping mode of scheduling transmission, and utilizing the signature sequences of groups except the group occupied by the scheduling transmission to carry the TPC for power control of the SRS and/or the SS for synchronization of the SRS; or,

dividing 80-N out of N signature sequences occupied by the scheduling transmission into set M groups, and utilizing each groupThe TPC used for controlling the power of the SRS and/or the SS used for synchronizing the SRS are carried by the signature sequences.

Preferably, the sending the TPC used for power control of the SRS and/or the SS used for synchronization of the SRS by using the E-HICH multiplexed with the non-scheduled transmission includes:

grouping the 80 signature sequences of the E-HICH according to a grouping mode of non-scheduling transmission, and utilizing the signature sequences of groups except the group occupied by the non-scheduling transmission to carry the TPC for power control of the SRS and/or the SS for synchronization of the SRS; or,

dividing 80-N out of N signature sequences occupied by the non-scheduled transmission into set M groups, and utilizing each groupThe TPC used for controlling the power of the SRS and/or the SS used for synchronizing the SRS are carried by the signature sequences.

and transmitting the TPC for power control of the SRS and/or the SS for synchronization of the SRS by utilizing spare bits in the E-HICH.

According to the scheme, in the TD-SCDMA system, the network side configures the SRS resource information for the user equipment UE, the configured SRS resource information is notified to the UE, and then the UE transmits the SRS according to the configuration information, so that the SRS is transmitted in the TD-SCDMA system.

Drawings

FIG. 1 is a flowchart illustrating an SRS implementation method in a TD-SCDMA system according to an embodiment of the present invention;

fig. 2a and fig. 2b are schematic flow diagrams of an SRS implementation method based on user-level SRS allocation according to an embodiment of the present invention;

fig. 3a and fig. 3b are schematic flow diagrams of an SRS implementation method based on user-level SRS allocation according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following embodiments and the accompanying drawings.

Fig. 1 is an exemplary flowchart of an SRS implementation method in a TD-SCDMA system according to an embodiment of the present invention. As shown in fig. 1, the process includes the following steps:

step 101, a network side configures SRS resource information for a user equipment UE, and notifies the configured SRS resource information to the UE.

According to different application scenarios, the SRS may be allocated to a user-level configuration (UE specific) or a cell-level configuration (cell specific). Two allocation schemes are described in detail below:

(1) user-level SRS allocation: when a UE service initiates and establishes a service Connection, such as entering a radio resource control Connection (RRC Connection) state or entering a CELL dedicated channel state (CELL _ DCH) in the RRC Connection state, a base station (Node B) or a Radio Network Controller (RNC) or other network equipment allocates SRS resources to each UE through a physical layer or higher layer signaling, and indicates the allocated SRS resource information to the corresponding UE. When the RNC allocates the SRS resource to each UE, the base station may first notify the RNC of the available SRS information, and then the RNC allocates the SRS resource to each UE according to the available SRS information. The available SRS information may include information such as SRS _ ID and corresponding available time.

Generally, the UE-level SRS resource information may be configured statically or dynamically.

The statically configured SRS resource information may include: SRS label (SRS _ ID), Transmission Interval (T)_SRS) And by the subframe offset (D)_SRS) And slot offset (TS)_SRS) The transmission time of the component. The dynamically configured SRS resource information may include: SRS _ ID, T_SRS、D_SRS、TS_SRSIn addition, the effective time or number of times (T) of the allocated SRS resource information may also be included_{SRS_duration}). The transmission interval is also referred to as a transmission interval or a transmission period.

SRS _ ID, T are given in Table 1_{SRS_duration}、T_SRS、D_SRSAnd T_SSRSAn example of a set of values and number of bits (bits) used:

TABLE 1

(2) Cell-level SRS allocation: for example, assuming that the set uplink channel is a shared information channel (HS-SICH) of a high-speed downlink shared channel, the SRS and the HS-SICH may be established in a one-to-one correspondence relationship (for example, the SRS and the HS-SICH having the correspondence relationship are assigned with the same ID). Thereafter, all UEs of the cell are informed of the correspondence between SRS and HS-SICH without dedicated signaling allocation for the UEs.

And 102, the UE transmits the SRS according to the SRS resource information.

(1) For user-level SRS allocation, a corresponding UE may start a resource allocation timer according to SRS resource information allocated by a network side, and transmit an SRS with an SRS _ ID at a corresponding transmission time when a transmission interval is reached.

In the case where the UE has two antennas, when transmitting the SRS, the SRS is generally transmitted alternately on the two antennas. In addition, in order to ensure the accuracy of channel estimation, the transmission intervals of the two SRSs on the two antennas should be reduced as much as possible, for this reason, a transmission interval effective time may be preset, and if any uplink data is transmitted in the transmission interval effective time before or after the TTI or timeslot where the current SRS to be transmitted is located, the SRS is transmitted on another antenna other than the antenna transmitting the uplink data; otherwise, the SRS is transmitted on another antenna than the antenna transmitting the previous SRS.

(2) For the SRS allocation at the cell level, when a UE in a cell currently calls a certain set uplink channel, the UE may bind and transmit the SRS having a one-to-one correspondence relationship with the set uplink channel according to the SRS resource information allocated by the network side when transmitting the set uplink channel.

When binding transmission is carried out, if two or more uplink time slots exist in the current Transmission Time Interval (TTI) for transmitting the set uplink channel, sending the SRS which has one-to-one correspondence with the set uplink channel on the time slots except the time slot for transmitting the set uplink channel; otherwise, the SRS with one-to-one correspondence relation with the set uplink channel is transmitted in the TTI immediately before or after the current TTI.

When the SRS which has one-to-one correspondence with the set uplink channel is transmitted on a time slot except a time slot for transmitting the set uplink channel, if the set uplink channel is transmitted in a non-sixth time slot (TS 6), the SRS which has one-to-one correspondence with the set uplink channel is transmitted in a time slot after the set uplink channel; when the set uplink channel is transmitted in TS6, the SRS, which has a one-to-one correspondence with the set uplink channel, is transmitted in a time slot before the set uplink channel.

When a UE has two antennas, when transmitting a set uplink channel and an SRS having a binding relationship, the set uplink channel and the corresponding SRS are transmitted on the two antennas, respectively.

In step 103, when the condition for stopping SRS transmission is satisfied, the UE ends SRS transmission.

(1) For the SRS allocation at the user level, the corresponding UE may terminate sending the SRS to the network side when the service is terminated or the service connection is exited or the cell dedicated channel state of the service connection is exited. Further, if the SRS resource information includes the valid time of the SRS resource, the corresponding UE terminates sending the SRS to the network side if the valid time of the SRS resource is reached before the UE ends the service or exits the service connection or exits the cell dedicated channel state of the service connection.

(2) For the SRS allocation at the cell level, after the UE finishes the call for setting the uplink channel, the UE stops transmitting the SRS in one-to-one correspondence with the uplink channel.

In addition, in the embodiment of the present invention, after the SRS is implemented as an uplink reference symbol which is separately transmitted, uplink maintenance and synchronization can be performed by using the SRS, so that a network needs to use a downlink channel to carry a Synchronization Shift (SS) to perform synchronization adjustment on the SRS. In addition, in order to ensure the receiving quality of the SRS and reduce the interference of the SRS to neighboring cells and other users, the network side may also perform power control on the SRS, and at this time, a downlink channel needs to be used to carry Transmission Power Control (TPC).

In a specific implementation, power control and synchronization of the SRS may be performed simultaneously, or may be performed separately, that is, the network side may send, to the UE, a TPC for power control of the SRS and/or an SS for synchronization of the SRS, and the UE may perform power control and/or synchronization of the SRS to be sent according to the received TPC and/or SS.

Considering that in the current HSUPA system, an E-HICH channel is included, and the E-HICH channel is carried by a downlink physical channel with spreading factor SF of 16, and an E-HICH carries 80 signature sequences, which are used for carrying feedback information of a base station to users, for example, ACK/NACK indications (which are distinguished by orthogonal signature sequences) of one or more users can be carried by the E-HICH channel, and are used for feeding back whether uplink data frames of each user are received correctly by the base station when the uplink data frames are sent through the E-PUCH channel.

Wherein, the ACK/NACK indications of the scheduling service and the non-scheduling service are respectively sent on different E-HICHs. For the scheduling UE, the E-HICH only carries ACK/NACK indication, and TPC and SS indication are carried by the E-AGCH. At this time, each UE is allocated with a signature sequence, and an E-HICH carries ACK/NACK feedback information of at most 80 UEs. For non-scheduling services, the E-HICH carries the TPC and SS domains for power control and synchronization of the E-PUCH in addition to the ACK/NACK indication. At this time, the 80 signature sequences may be divided into 20 groups, each group including 4 sequences, and a higher layer may allocate a unique set of signature sequences to each non-scheduled user. Of the four signature sequences, the first signature sequence is used to indicate ACK/NACK, and the other three signature sequences are used to indicate TPC/SS commands. The three signature sequences and the corresponding three inverse sequences are six possible sequences for indicating the TPC/SS command status. Wherein, the reverse sequence is obtained by changing each bit 0 into bit 1 and each bit 1 into bit 0 in the sequence.

Therefore, the embodiment may also consider using the E-HICH to carry the TPC and/or SS of the SRS. When each set of signature sequences only carries the TPC, since the TPC only has two states, "Down" and "Up", a mapping relationship between the signature sequence index and the TPC as shown in table 2 may be adopted.

index	TPC command
		0	′Down′
1	′Up′

TABLE 2

When each set of signature sequences only carries the SS, since the SS has three states, "Down", "Up", and "Do nothing", a mapping relationship between signature sequence indexes and TPCs as shown in table 3 can be adopted.

index	SS command
		00	′Down′
11	′Up′
		01	‘Do nothing’

TABLE 3

When the group signature sequence carries both TPC and SS, since there are six states, the mapping relationship between the signature sequence index and TPC as shown in table 4 can be used.

index	TPC command	SS command
			0	‘DOWN’	‘DOWN’
1	‘UP’	‘DOWN’
			2	‘DOWN’	‘UP’
3	‘UP’	‘UP’
			4	‘DOWN’	‘Do Nothing’
5	‘UP’	‘Do Nothing’

TABLE 4

The specific implementation method using E-HICH bearer can be various, and some of them are listed below:

the first method comprises the following steps: and transmitting TPC and/or SS of the SRS by using one or more E-HICHs.

In this case, the 80 signature sequences of the E-HICH can be divided into M groups, and each group is usedEach signature sequence carries the TPC and/or SS. The TPC and/or SS for multiple users may be distinguished by orthogonal signature sequences.

And the second method comprises the following steps: the TPC and/or SS are transmitted using the E-HICH multiplexed with the scheduled transmission.

In this case, there are two possible ways:

the first method is as follows: and grouping the 80 signature sequences of the E-HICH according to a grouping mode of scheduling transmission, carrying TPC and/or SS by using the signature sequences of the groups except the group occupied by the scheduling transmission, and correspondingly, modifying the mapping relation between the signature sequences and ACK/NCK in the scheduling transmission into the mapping relation between the signature sequences and the TPC and/or SS.

The second method comprises the following steps: if the scheduled transmission occupies N signature sequences, the SRS may adopt a signature sequence grouping manner different from that of the UE scheduled for transmission, for example, 80-N signature sequences except the N signature sequences occupied by the scheduled transmission may be divided into M groups, and each group is utilizedEach signature sequence carries TPC and/or SS.

And the third is that: the TPC and/or SS are transmitted using the E-HICH multiplexed with non-scheduled transmissions.

In this case, there are two possible ways:

the first method is as follows: and grouping the 80 signature sequences of the E-HICH according to a grouping mode of non-scheduling transmission, and carrying TPC and/or SS by using the signature sequences of groups except the group occupied by the non-scheduling transmission.

The second method comprises the following steps: if the non-scheduled transmission occupies N signature sequences, the SRS may adopt a signature sequence grouping manner different from the UE for non-scheduled transmission, for example, 80-N signature sequences except the N signature sequences occupied by the non-scheduled transmission may be divided into M groups, and each group is utilizedEach signature sequence carries TPC and/or SS.

In addition, since the E-HICH includes 8 spare bits, the 8 spare bits in the E-HICH may also be used to carry the TPC and/or SS.

Based on the above description, the SRS implementation method in the TD-SCDMA system in the embodiment of the present invention is described in detail below by taking user-level SRS allocation as an example.

Fig. 2a and fig. 2b are schematic flow diagrams of an SRS implementation method based on user-level SRS allocation according to an embodiment of the present invention. In fig. 2a, a single UE is taken as an example, and in fig. 2b, a plurality of UEs are taken as an example.

Referring to fig. 2a in conjunction with fig. 2b, the process includes the following steps:

in step 200, the base station reports the information of the available SRS to the RNC. The available SRS information may include information such as SRS _ ID and corresponding available time.

Step 201, the RNC at the network side configures the UE currently establishing service connection with SRS _ ID and T_SRS、D_SRSAnd TS_SRSOr includes SRS _ ID, T_{SRS_duration}、T_SRS、D_SRSAnd TS_SRSAnd notifying the configured SRS resource information to the corresponding UE.

For the case of multiple UEs in fig. 2b, step 201 is performed for each UE.

Step 202, the RNC notifies the Node B on the network side of the correspondence between the SRS resource information and the identity (UE _ ID) of the UE.

In the case of multiple UEs in fig. 2B, the RNC notifies the Node B of the correspondence between the SRS resource information allocated to each UE and the UE _ ID of the corresponding UE.

In step 203, the UE feeds back the confirmation information of the received SRS resource information to the RNC.

For the case where there are multiple UEs in fig. 2b, each UE performs this step 203 separately.

In step 204, the Node B feeds back the received SRS resource information and the confirmation information of the corresponding UE _ ID to the RNC.

For the case of multiple UEs in fig. 2B, the Node B feeds back to the RNC for each UE.

Step 205, the UE starts a resource allocation timer according to the SRS resource information of step 201, and starts a resource allocation timer according to T_SRS、D_SRSAnd T_SSRSOr T_{SRS_duration}、T_SRS、D_SRSAnd TS_SRSThe SRS with the SRS _ ID is transmitted at regular time.

For the case where there are multiple UEs in fig. 2b, then each UE performs this step separately.

Meanwhile, the Node B confirms the correspondence between the UE and the SRS according to the UE _ ID of the UE and the allocated SRS resource information in step 202, and periodically detects the SRS transmitted by the UE labeled with UE _ ID.

For the case of multiple UEs in fig. 2B, the Node B performs this step separately for each UE.

In step 206, the Node B sends TPC and/or SS for power control and/or synchronization to the UE through the E-HICH according to the condition of receiving SRS.

For the case of multiple UEs in fig. 2B, the Node B may indicate the TPC and/or SS of the multiple UEs to the respective UEs through mutually orthogonal signature sequences.

And then, when the service of the UE is finished or the UE exits the service connection or the UE pushes out the RRC _ DCH state of the service connection or the SRS resource effective time of the UE arrives, the UE terminates the SRS transmission.

For the case where there are multiple UEs in fig. 2b, each UE performs this operation according to its own situation.

Meanwhile, the Node B learns that the UE stops sending the SRS through signaling, or the Node B stops detecting the SRS marked as the SRS _ ID at fixed time according to the SRS resource effective time, and deletes the corresponding relation between the UE marked as the UE _ ID and the SRS marked as the SRS _ ID.

For the case of multiple UEs in fig. 2B, the Node B operates accordingly for each UE.

Fig. 3a and fig. 3b are schematic flow diagrams of an SRS implementation method based on user-level SRS allocation according to an embodiment of the present invention. In fig. 3a, a single UE is taken as an example, and in fig. 3b, a plurality of UEs are taken as an example.

Referring to fig. 3a in conjunction with fig. 3b, the process includes the following steps:

step 301, the Node B of the network side configures the UE for establishing the service connection currently, including SRS _ ID, T_SRS、D_SRSAnd TS_SRSOr includes SRS _ ID, T_{SRS_duration}、T_SRS、D_SRSAnd TS_SRSAnd notifying the configured SRS resource information to the corresponding UE.

For the case of multiple UEs in fig. 3b, step 201 is performed for each UE.

Step 302, the UE feeds back the confirmation information of the received SRS resource information to the Node B.

For the case where there are multiple UEs in fig. 3b, each UE performs this step 302 separately.

Step 303, the UE starts a resource allocation timer according to the SRS resource information of step 301, and starts a resource allocation timer according to T_SRS、D_SRSAnd TS_SRSOr T_{SRS_duration}、T_SRS、D_SRSAnd TS_SRSThe SRS with the SRS _ ID is transmitted at regular time.

For the case where there are multiple UEs in fig. 3b, then each UE performs this step separately.

Meanwhile, the Node B detects the SRS sent by the UE with the label of UE _ ID at fixed time according to the SRS resource information distributed to the current UE.

For the case of multiple UEs in fig. 3B, the Node B performs this step separately for each UE.

Step 304, the Node B sends TPC and/or SS for power control and/or synchronization to the UE through the E-HICH according to the condition of receiving SRS.

For the case of multiple UEs in fig. 3B, the Node B may indicate the TPC and/or SS of the multiple UEs to the respective UEs through mutually orthogonal signature sequences.

And then, the service of the UE is ended, or the UE exits the service connection, or the UE pushes out the RRC _ DCH state of the service connection, or the SRS resource effective time of the UE is reached, and the UE terminates the SRS transmission.

In the case of fig. 3b where there are a plurality of UEs, each UE performs step 306 according to its own situation.

For the case of multiple UEs in fig. 3B, the Node B operates accordingly for each UE.

The above-mentioned embodiments are intended to illustrate the objects, aspects and advantages of the present invention, and it should be understood that the above-mentioned embodiments are merely preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A method for realizing an uplink reference symbol SRS in a time division-synchronous code division multiple access TD-SCDMA system is characterized in that the method comprises the following steps:

B. the UE transmits the SRS according to the SRS resource information;

the step A comprises the following steps: configuring SRS resource information comprising one or more one-to-one correspondence relations between SRS and set uplink channels for UE of a current cell by taking the cell as a unit and a network side, and notifying the SRS resource information to the UE of the current cell;

2. The method of claim 1, wherein step a is preceded by the further step of: the base station reports the available SRS information to the RNC;

3. The method of claim 1, wherein the bundling the SRS and the set uplink channel for transmission, the SRS and the set uplink channel having a one-to-one correspondence with the set uplink channel, comprises: when more than two uplink time slots exist in the current transmission time interval TTI used for transmitting the set uplink channel, transmitting the SRS which has one-to-one correspondence with the set uplink channel on the time slots except the time slot for transmitting the set uplink channel; otherwise, the SRS with one-to-one correspondence relation with the set uplink channel is transmitted in the TTI immediately before or after the current TTI.

4. The method of claim 3, wherein the transmitting the SRS having the one-to-one correspondence with the set uplink channel in the time slot other than the time slot in which the set uplink channel is transmitted comprises:

5. The method of any one of claims 1 to 4, wherein the setting the uplink channel comprises: shared information channel HS-SICH of high speed down shared channel.

6. The method of any of claims 1 to 4, wherein the UE comprises two antennas;

7. The method of any of claims 1 to 4, further comprising:

8. The method of claim 7, wherein the transmitting the TPC for power control of the SRS and/or the SS for synchronization of the SRS comprises:

9. The method of claim 8, wherein the transmitting the TPC for power control over SRS and/or the SS for synchronization over SRS with a separate E-HICH comprises:

10. The method of claim 8, wherein the transmitting the TPC for power control and/or the SS for synchronization of the SRS with the E-HICH multiplexed with scheduled transmissions comprises:

11. The method of claim 8, wherein the transmitting the TPC for power control and/or the SS for synchronization of an SRS with an E-HICH multiplexed with non-scheduled transmissions comprises:

12. The method of claim 7, wherein the transmitting the TPC for power control of the SRS and/or the SS for synchronization of the SRS comprises: