CN101404817A

CN101404817A - SRS band width collocation method, system and apparatus

Info

Publication number: CN101404817A
Application number: CNA2008101803238A
Authority: CN
Inventors: 李伟; 彭炳光
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2008-11-24
Filing date: 2008-11-24
Publication date: 2009-04-08
Anticipated expiration: 2028-11-24
Also published as: CN101404817B

Abstract

The embodiment of the invention discloses a method used for allocating SRS bandwidth, a system and a device thereof. The method comprises the steps as follows: when subdistrict-grade SRS bandwidth allocation is changed so that the allocation of user-grade SRS bandwidth is triggered, the method confirms the user-grade SRS bandwidth for the subdistrict user allocation according to the allocation strategy based on the principle that the quantity of the users with the user-grade SRS bandwidth being changed is the least; the invention sends a command to the users with the user-grade SRS bandwidth being changed; and the command carries user-grade SRS bandwidth information after the user-grade SRS bandwidth is changed. In the invention, the SRS bandwidth of most users is reserved to the greatest extent, so the quantity of the users without change is the most, and the quantity of the users with change is the least; for the whole system, the invention ensures that the signaling cost required for reallocating the user-grade SRS bandwidth is reduced greatly and simplifies the complexity of SRS bandwidth reallocation.

Description

The method, system and device of SRS band width configuration

Technical field

The present invention relates to communication technical field, particularly relate to a kind of method, system and device of SRS band width configuration.

Background technology

Along with being showing improvement or progress day by day of society, global radio communication presents the development trend of mobile, broadband and IPization, and LTE (Long Term Evolution, Long Term Evolution plan) has realized reducing cost and improved the target of performance.In the LTE system, UE (User Equipment, subscriber equipment) reference signal that sends to eNB (base station) includes but not limited to DM-RS (Demodulation Reference Signal, demodulated reference signal) and SRS (Sounding Reference Signal, reference signal detection), wherein, DM-RS is used for the demodulation of business datum and signaling information, and SRS is used for eNB UE is measured.In the application of reality, the frequency band that SRS takies can not with PUCCH (Physical Uplink Controlchannel, Physical Uplink Control Channel) frequency band that takies overlaps, and the bandwidth of PUCCH is provided by system broadcast message in the sub-district, when the bandwidth of PUCCH changes, the SRS maximum bandwidth of cell-level will be according to the variation of PUCCH bandwidth and is changed thereupon, and user's SRS band width configuration will be affected.

In the prior art, when the SRS of cell-level maximum bandwidth changes, need the bandwidth in this sub-district be reconfigured.

In realizing process of the present invention, the inventor finds that there are the following problems at least in the prior art:

It is very big that all users are carried out SRS bandwidth reprovision signaling consumption, and elapsed time is also longer.

Summary of the invention

The embodiment of the invention provides a kind of method, system and device of SRS band width configuration, with when cell-level SRS band width configuration changes to the user's configure user level SRS bandwidth in the sub-district, make that the complexity of SRS bandwidth reprovision is simplified.

In order to achieve the above object, the embodiment of the invention has proposed a kind of method of SRS band width configuration, comprising:

Cell-level SRS band width configuration changes and when triggering configuration to user class SRS bandwidth, minimum according to the number of users that changes with user class SRS bandwidth is the collocation strategy of principle, is defined as user configured user class SRS bandwidth in the sub-district;

The user who changes to user class SRS bandwidth sends indication, carries the user class SRS bandwidth information after described user class SRS bandwidth changes in the described indication.

The embodiment of the invention has also proposed a kind of device of the SRS of configuration bandwidth, comprising:

Memory module is used to store SRS band width configuration strategy, and the number of users that described strategy changes with user class SRS bandwidth is minimum to be principle;

Configuration module is used for according to the SRS band width configuration strategy that described memory module is stored, being defined as user configured user class SRS bandwidth in the sub-district when cell-level SRS band width configuration changes and triggers configuration to user class SRS bandwidth;

Indicating module is used for sending indication to the user that user class SRS bandwidth changes, and carries the user class SRS bandwidth information after described user class SRS bandwidth changes in the described indication.

The embodiment of the invention has also proposed a kind of system of SRS bandwidth reprovision, comprises the user who uses the SRS bandwidth in above-mentioned device and the sub-district.

Compared with prior art, the embodiment of the invention has the following advantages:

Change when triggering the reconfiguring of user class SRS bandwidth in the maximum bandwidth owing to cell-level SRS, the number of users that changes with user class SRS bandwidth is minimum to be principle, and user in the sub-district is carried out reconfiguring of user class SRS bandwidth.Owing to kept most users' SRS bandwidth as far as possible, the feasible number of users maximum that does not change, the number of users that changes is minimum, for entire system, the signaling consumption that feasible needs reconfigure user class SRS bandwidth significantly reduces, and has simplified the complexity of SRS bandwidth reprovision.

Description of drawings

In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the method flow diagram of a kind of SRS band width configuration of the embodiment of the invention one proposition;

Fig. 2 is the method flow diagram of a kind of SRS band width configuration of the embodiment of the invention two propositions;

Fig. 3 is that the tree structure of the bandwidth tree of the cell-level SRS that proposes of the embodiment of the invention two changes schematic diagram;

Fig. 4 is the method flow diagram of a kind of SRS band width configuration of the embodiment of the invention three propositions;

Fig. 5 is that the tree structure of the bandwidth tree of the cell-level SRS that proposes of the embodiment of the invention three changes schematic diagram;

Fig. 6 is the structure drawing of device of a kind of SRS band width configuration of the embodiment of the invention four propositions.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.

A kind of SRS band width configuration method that the embodiment of the invention one proposes as shown in Figure 1, comprising:

Step S101, cell-level SRS band width configuration changes and when triggering configuration to user class SRS bandwidth, minimum according to the number of users that changes with user class SRS bandwidth is the collocation strategy of principle, is defined as user configured user class SRS bandwidth in the sub-district;

Step S102, the user who changes to user class SRS bandwidth sends indication, carries the user class SRS bandwidth information after described user class SRS bandwidth changes in the described indication.

As seen, in the embodiment of the invention, change when triggering the reconfiguring of user class SRS bandwidth in the maximum bandwidth owing to cell-level SRS, the number of users that changes with user class SRS bandwidth is minimum to be principle, and user in the sub-district is carried out reconfiguring of user class SRS bandwidth.Owing to kept most users' SRS bandwidth as far as possible, the feasible number of users maximum that does not change, the number of users that changes is minimum, for entire system, the signaling consumption that feasible needs reconfigure user class SRS bandwidth significantly reduces, and has simplified the complexity of SRS bandwidth reprovision.

The method of a kind of SRS band width configuration that the embodiment of the invention two proposes in the present embodiment, is 10MHz with the system bandwidth, and it is that example describes that the bandwidth of PUCCH becomes 2RB by 12RB, as shown in Figure 2, comprising:

Step S201, before the bandwidth of PUCCH changed, the base station sent to user in this sub-district by broadcast message with initial cell level SRS band width configuration.

Concrete, this cell-level SRS band width configuration is the tree structure of cell-level SRS bandwidth tree, for example, when system bandwidth is 10MHz, then the RB of system adds up to 50RB, and the summation of the bandwidth of PUCCH and SRS bandwidth is 50RB to the maximum, and promptly the summation of the bandwidth of PUCCH and SRS maximum bandwidth is 50RB to the maximum.When the bandwidth of PUCCH is not more than 2, promptly

N_{RB}^{PUCCH} \leq 2

The time, the tree structure of this cell-level SRS bandwidth tree be 48,24,12,4}, the bandwidth that is not more than 10RB and this PUCCH when the bandwidth of PUCCH is during greater than 2RB, promptly

2 < N_{RB}^{PUCCH} \leq 10

The time, the tree structure of this cell-level SRS bandwidth tree be 40,20,4}, the bandwidth that is not more than 14RB and this PUCCH when the bandwidth of PUCCH is during greater than 10RB, promptly

10 < N_{RB}^{PUCCH} \leq 14

The time, the tree structure of this cell-level SRS bandwidth tree is { 36,12,4}, in addition, the bandwidth of PUCCH also has other possibility, the tree structure of corresponding district level SRS bandwidth tree also has other combination, the tree structure one of this cell-level SRS bandwidth tree has 8 kinds in the application of reality, is to send to user in the sub-district by broadcast message, and this broadcast message can be 3 bits.User storage in the sub-district combined situation of 8 kinds of bandwidth tree, after the user in this sub-district is receiving broadcast message from 3 bits of base station, obtain the tree structure of this sub-district corresponding district level SRS bandwidth tree according to the broadcast message of this 3 bit.

In the present embodiment, when the bandwidth of PUCCH is 12RB, the tree structure that the base station can get access to cell-level SRS bandwidth tree this moment is { 36,12,4}, the base station is according to the combined situation of 8 kinds of bandwidth tree, is { 36 with the tree structure of cell-level SRS bandwidth tree, 12, the broadcast message of the pairing information of 4} by 3 bits sends to the user in this sub-district.For example, the tree structure of cell-level SRS bandwidth tree is { 36,12,4}, in the combination of 8 kinds of bandwidth tree, be positioned at the 4th, the base station can be by 3 bits broadcast message with 3 users that send in this sub-district, after broadcast message that the user in the sub-district receives this 3 bit is 3, combined situation according to 8 kinds of bandwidth tree of this user storage, the tree structure that gets access to 3 pairing cell-level SRS bandwidth tree is { 36,12,4}, the assembled arrangement of employed 8 kinds of bandwidth tree was identical when the assembled arrangement of 8 kinds of bandwidth tree of user memory in sub-district storage can be with base station configuration.

Step S202, the base station is by RRC (Radio Resource Control, radio resource control) message sends to user in this sub-district with initial user level SRS bandwidth information, so that the user in this sub-district obtains this user's user class SRS bandwidth in conjunction with this cell-level SRS band width configuration situation.

Concrete, user class SRS bandwidth is each other value of level on the cell-level SRS bandwidth tree, in the tree structure of cell-level SRS bandwidth tree, the maximum degree of depth is 4, and 4 kinds of user class SRS bandwidth values are promptly arranged at most, comprise the 0th grade, the 1st grade, the 2nd grade, 3rd level, wherein, the 0th grade is highest level, and the bandwidth of distributing when distributing is maximum, 3rd level is minimum rank, and the bandwidth of distributing when distributing is minimum.In the tree structure of SRS bandwidth, other SRS bandwidth value of each grade is unit with RB, and the bandwidth of 3rd level is 4RB, and the 2nd grade bandwidth is the integral multiple of 3rd level bandwidth, the 1st grade bandwidth is the integral multiple of the 2nd grade of bandwidth, and the 0th grade bandwidth is the integral multiple of the 1st grade of bandwidth.In the present embodiment, when the bandwidth of PUCCH is 12RB, the tree structure of cell-level SRS bandwidth tree be 36,12,4}, the base station sends to initial user level SRS bandwidth information by RRC message the user of this sub-district.With this RRC message (or claiming signaling) is that 2 bits are example, for example, in the 0th grade of correspondence 2 bit RRC message 0, in the 1st grade of correspondence 2 bit RRC message 1, in the 2nd grade of correspondence 2 bit RRC message 2, in the corresponding 2 bit RRC message of 3rd level 3 o'clock, when the RRC message of 2 bits of the user in the base station sends to the sub-district is 1, user in this sub-district confirms that then this user is on the 1st grade of the tree structure of SRS bandwidth tree, and the tree structure of the cell-level SRS bandwidth tree that the user in this sub-district gets access to is { 36,12, the user class SRS bandwidth that 4}, the user in this sub-district can get access to this user is 12RB.

After the tree structure of SRS bandwidth tree is determined, need on this tree structure the user's distributing user level SRS bandwidth in this sub-district.In the present embodiment, the tree structure of cell-level SRS bandwidth tree is { 36,12,4}, distributing user is specially on the tree structure of this cell-level SRS bandwidth tree: in 3rd level, for each user distributes bandwidth is the user class SRS bandwidth of 4RB, and the maximum bandwidth of this bandwidth tree is 36RB, promptly can be that to distribute bandwidth be the user class SRS bandwidth of 4RB for 9 user a, b, c, d, e, f, g, h, i simultaneously.In the 1st grade, the user class SRS bandwidth of distributing bandwidth 12RB for each user, and the maximum bandwidth of this bandwidth tree is 36RB promptly can be that to distribute bandwidth be the user class SRS bandwidth of 12RB for 3 user B, C, D simultaneously.In the 0th grade, the user class SRS bandwidth of distributing bandwidth 36RB for each user, and the maximum bandwidth of this bandwidth tree is 36RB promptly can be that to distribute bandwidth be the user class SRS bandwidth of 36RB to 1 user A simultaneously.

Step S203, when the bandwidth of PUCCH reduces, the base station will obtain the new cell-level SRS band width configuration of this sub-district according to the variation of PUCCH bandwidth.

Be the bandwidth change that the bandwidth change of PUCCH causes cell-level SRS, thereby triggering cell level SRS band width configuration change.

In the sub-district, the bandwidth of PUCCH is provided by system broadcast message, is subjected to the influence of number of users, system loading and the descending scheduling strategy of system, and the bandwidth of PUCCH can change.And the summation of cell-level SRS bandwidth and PUCCH bandwidth is no more than system bandwidth, and the frequency bandwidth that SRS takies can not overlap with the frequency band that PUCCH takies, and when the bandwidth of PUCCH changes, the SRS bandwidth of cell-level also will change.In the present embodiment, when the bandwidth of PUCCH reduced, the SRS bandwidth of cell-level will increase according to the variation of PUCCH bandwidth.And when the SRS of cell-level bandwidth need change, the base station obtained the new cell-level SRS band width configuration of this sub-district according to the variation of PUCCH bandwidth.

Concrete, in the present embodiment, the supposing the system bandwidth is 10MHz, and the RB of system adds up to 50RB, and the summation of the bandwidth of PUCCH and SRS bandwidth is 50RB to the maximum, and promptly the summation of the bandwidth of PUCCH and SRS maximum bandwidth is 50RB to the maximum.To become 2RB when the bandwidth of PUCCH by 12RB is example, then the tree structure of this cell-level SRS bandwidth tree will by 36,12, and 4} become 48,24,12,4}.

Step S204, the base station sends to user in this sub-district by broadcast message with the new cell-level SRS band width configuration of this sub-district.

Concrete, the broadcast message that the base station can be by 3 bits is that { 48,24,12, pairing 3 bit informations of 4} send to the user in this sub-district with the tree structure of cell-level SRS bandwidth tree.

Step S205, the base station is according to new cell-level SRS band width configuration, and the number of users that changes with user class SRS bandwidth minimum be the collocation strategy of principle, be defined as user configured user class SRS bandwidth in the sub-district.

During user class SRS bandwidth in distributing the sub-district, cell-level SRS band width configuration adopts bandwidth tree to represent, this bandwidth tree comprises the target bandwidth tree after cell-level SRS band width configuration changes preceding source bandwidth tree and the change of cell-level SRS band width configuration, the collocation strategy that adopts is: the number of users that changes with user class SRS bandwidth is minimum to be principle, be defined as user configured user class SRS bandwidth in the sub-district, reduce the number of users that user class SRS bandwidth changes as far as possible, also promptly reduce the number of users that need reconfigure user class SRS bandwidth.Comprise: to the user on the bandwidth tree of source according to first low level after high level order dispose step by step, in the configuration of each grade, user as much as possible is configured on the appropriate level that user class SRS bandwidth remains unchanged on this target bandwidth tree; Further, after user as much as possible being configured on the appropriate level that user class SRS bandwidth remains unchanged on the target bandwidth tree, in the configuration of each grade, keep the constant user of user class SRS bandwidth for failing, be configured on the appropriate level of target bandwidth tree of user class SRS bandwidth change amplitude minimum; Further, for failing to keep the constant user of user class SRS bandwidth, after being configured on the appropriate level of target bandwidth tree of user class SRS bandwidth change amplitude minimum, in the configuration of each grade, when failing to keep the constant user of user class SRS bandwidth can't all be configured on the appropriate level of target bandwidth tree of user class SRS bandwidth change amplitude minimum, the even lower level that the user that can't be configured to this appropriate level is configured to this target bandwidth tree appropriate level does not go up.

Concrete, strategy for the user's configure user level SRS bandwidth in this sub-district on the SRS of new cell-level bandwidth tree includes but not limited to: the user on the bandwidth tree before 1) cell-level SRS band width configuration being changed according to first low level after high level order, be configured on the bandwidth tree after cell-level SRS band width configuration changes, to be the little user's configure user level SRS bandwidth of SRS bandwidth as far as possible, make the user's that the SRS bandwidth is little user class SRS bandwidth remain unchanged, number is many comparatively speaking owing to low-level user, can save the RRC signaling to greatest extent so take such strategy, and other user class bandwidth of lowermost level on the bandwidth tree after the minimum rank on the bandwidth tree of cell-level SRS band width configuration before changing and the change of cell-level SRS band width configuration is identical, be 4RB, make to need not sending RRC message during other user's configure user level of lowermost level SRS bandwidth on the bandwidth tree of cell-level SRS band width configuration before changing, thereby save the RRC signaling; 2) cell-level SRS band width configuration is changed the user class SRS bandwidth of user on the preceding bandwidth tree and the user class SRS bandwidth on the bandwidth tree after the change of cell-level SRS band width configuration and carry out size relatively, and search for step by step according to high level order after the first low level, on the appropriate level of the bandwidth tree after the cell-level SRS band width configuration that the user before cell-level SRS band width configuration changed on the bandwidth tree is configured to bandwidth change amplitude minimum changes, to reduce the variation of user class SRS bandwidth as far as possible, and obtain maximum user class SRS bandwidth, make the base station can obtain the information of more subscriber equipment when UE being measured according to user class SRS; 3) after choosing suitable configure user level SRS bandwidth-level, in the time of on the corresponding level of the bandwidth tree after the user on the bandwidth tree before the change of cell-level SRS band width configuration can't all be configured to the change of cell-level SRS band width configuration, the even lower level that user on the bandwidth tree before the change of cell-level SRS band width configuration is configured to the bandwidth tree institute corresponding level after cell-level SRS band width configuration changes does not go up, to satisfy the configuration requirement of user class SRS bandwidth, make the base station can obtain the information of subscriber equipment accurately when UE being measured according to user class SRS.

After the tree structure of the bandwidth tree of SRS is determined, need on this tree structure the user's distributing user level SRS bandwidth in this sub-district.In the scene that present embodiment provides, when the bandwidth of the PUCCH in the sub-district became 2RB by 12RB, when the maximum bandwidth of this cell-level SRS then became 48RB by 36RB, the variation of the tree structure of the bandwidth tree of this cell-level SRS as shown in Figure 3.In the present embodiment, the tree structure of cell-level SRS bandwidth tree is { 48,24,12,4}, distributing user is specially on this tree structure: in 3rd level, be the user class SRS bandwidth of 4RB for each user distributes bandwidth, and the maximum bandwidth of this bandwidth tree is 48RB, can be the user class SRS bandwidth that 12 users distribute 4RB simultaneously; In the 2nd grade, be the user class SRS bandwidth of 12RB for each user distributes bandwidth, and the maximum bandwidth of this bandwidth tree is 48RB, can be the user class SRS bandwidth that 4 users distribute 12RB simultaneously; In the 1st grade, be the user class SRS bandwidth of 24RB for each user distributes bandwidth, and the maximum bandwidth of this bandwidth tree is 48RB, can be divided into 2 users simultaneously and distribute 24RB user class SRS bandwidth; In the 0th grade, the bandwidth of distributing for each user is 48RB, and the maximum bandwidth of this bandwidth tree is 48RB, can only distribute the user class SRS bandwidth of 48RB for 1 user.

In the present embodiment, the user class SRS bandwidth information that can distribute for the user on the tree structure according to the bandwidth tree that reconfigures strategy and above-mentioned SRS that reduces user that user class SRS bandwidth changes be the user's configure user level SRS bandwidth on the bandwidth tree before cell-level SRS band width configuration changes, be specifically as follows: other user of lowermost level on the bandwidth tree before cell-level SRS band width configuration is changed is configured on the minimum rank of the bandwidth tree after cell-level SRS band width configuration changes, and described minimum rank is the 3rd level of described bandwidth tree; Be clipped to the high-level 3rd level, the 2nd grade, the 1st grade, the 0th grade of being followed successively by from rudimentary; Correspond in the present embodiment, on the tree structure of new SRS bandwidth tree during distributing user, need to distribute from the preceding lower-level user of the bandwidth tree change of cell-level SRS earlier, promptly distribute the 3rd level user before bandwidth tree changes earlier, among the 3rd level user before bandwidth tree changes, have 9 user a, b, c, d, e, f, g, h, i, the user class SRS bandwidth of distributing for each user is 4RB, in the tree structure after bandwidth tree changes, need the 3rd level user before the reserved bandwidth tree changes, promptly need keep user a at the 3rd level in the tree structure after bandwidth tree changes, b, c, d, e, f, g, h, i, and in the 3rd level of the tree structure after bandwidth tree changes, can dispose the user class SRS bandwidth of 4RB for 12 users simultaneously, thereby kept user a, b, c, d, e, f, g, h, i can also be 3 l that Add User simultaneously, m, n distributes the user class SRS bandwidth of 4RB.Because the user class SRS bandwidth of user a, b, c, d, e, f, g, h, i does not change, just need not send RRC message to user a, b, c, d, e, f, g, h, i, thereby saved the RRC signaling, in the present embodiment, the base station need send RRC message to user l, m, n, carried the information that user l, m, n have been given the user class SRS bandwidth of 4RB in this message.

After 3rd level user configuration on the bandwidth tree before cell-level SRS band width configuration changes is finished, the 2nd grade of user that this cell-level SRS band width configuration is changed on the preceding bandwidth tree is configured, user class SRS bandwidth by the bandwidth tree after upwards search cell level SRS band width configuration changes step by step, the 2nd grade of user on the bandwidth tree before cell-level SRS band width configuration changed is configured on the appropriate level of SRS bandwidth change amplitude minimum of the bandwidth tree after the change, in the time of on the appropriate level of the bandwidth tree after the SRS band width configuration that the 2nd grade of user on the bandwidth tree before cell-level SRS band width configuration changes can't be configured to bandwidth change amplitude minimum changes, the even lower level of the bandwidth tree after the SRS band width configuration that the 2nd grade of user on the bandwidth tree before this cell-level SRS band width configuration changed is configured to bandwidth change amplitude minimum changes does not go up; Correspond in the present embodiment, cell-level SRS band width configuration changes the 2nd grade of user class SRS bandwidth that does not upward adapt to of preceding bandwidth tree, does not promptly need to be configured for the 2nd grade of user that cell-level SRS band width configuration changes on the preceding bandwidth tree.

After the 2nd grade of user's configuration on the bandwidth tree before cell-level SRS band width configuration changes finished, the 1st grade of user that this cell-level SRS band width configuration is changed on the preceding bandwidth tree is configured, user class SRS bandwidth by the bandwidth tree after upwards search cell level SRS band width configuration changes step by step, the 1st grade of user on the bandwidth tree before cell-level SRS band width configuration changed is configured on the appropriate level of SRS bandwidth change amplitude minimum of the bandwidth tree after the change, in the time of on the appropriate level of the bandwidth tree after the SRS band width configuration that the 1st grade of user on the bandwidth tree before cell-level SRS band width configuration changes can't be configured to bandwidth change amplitude minimum changes, the even lower level of the bandwidth tree after the SRS band width configuration that the 1st grade of user on the bandwidth tree before this cell-level SRS band width configuration changed is configured to bandwidth change amplitude minimum changes does not go up; Correspond in the present embodiment, on the tree structure of new SRS bandwidth tree during distributing user, the 1st grade of user on the bandwidth tree before need change this moment to cell-level SRS band width configuration is configured, among the 1st grade of user before bandwidth tree changes, have 3 user B, C, D, the user class SRS bandwidth of distributing for each user is 12RB, in the tree structure after bandwidth tree changes, need the 1st grade of user before the reserved bandwidth tree changes, according to user class SRS bandwidth by the bandwidth tree after upwards search cell level SRS band width configuration changes step by step, the 1st grade of user on the bandwidth tree before cell-level SRS band width configuration changed is configured to the strategy that reconfigures on the appropriate level of SRS bandwidth change amplitude minimum of the bandwidth tree after the change, to the upwards search step by step of the tree structure after the bandwidth tree change, 3rd level is 4RB, the 2nd grade is 12RB, the 1st grade is 24RB, the 0th grade is 48RB, the appropriate level of the SRS bandwidth change amplitude minimum of the 1st grade (12RB) on the bandwidth tree before changing with cell-level SRS band width configuration as can be known be on the bandwidth tree after cell-level SRS band width configuration changes the 2nd grade (12RB), promptly need be in the tree structure after bandwidth tree changes the 2nd grade keeps user B, C, D, in the 2nd grade of tree structure after bandwidth tree changes, can dispose the user class SRS bandwidth of 12RB for 4 users simultaneously, keep user B, C, D simultaneously can also be the another one user class SRS bandwidth that E distributes 12RB that Adds User.Because the user class SRS bandwidth of user B, C, D does not change, just need not send RRC message to user B, C, D, thereby saved the RRC signaling, in the present embodiment, the base station also needs to send RRC message to user E, carried user E in this message and given the information of the user class SRS bandwidth of 12RB, detailed process is described in subsequent step S206, is not described in detail at this.

After the 1st grade of user's configuration on the bandwidth tree before cell-level SRS band width configuration changes finished, the 0th grade of user that this cell-level SRS band width configuration is changed on the preceding bandwidth tree is configured, user class SRS bandwidth by the bandwidth tree after upwards search cell level SRS band width configuration changes step by step, the 0th grade of user on the bandwidth tree before cell-level SRS band width configuration changed is configured on the appropriate level of SRS bandwidth change amplitude minimum of the bandwidth tree after the change, in the time of on the appropriate level of the bandwidth tree after the SRS band width configuration that the 0th grade of user on the bandwidth tree before cell-level SRS band width configuration changes can't be configured to bandwidth change amplitude minimum changes, the even lower level of the bandwidth tree after the SRS band width configuration that the 0th grade of user on the bandwidth tree before this cell-level SRS band width configuration changed is configured to bandwidth change amplitude minimum changes does not go up.Correspond in the present embodiment, on the tree structure of new SRS bandwidth tree during distributing user, the 0th grade of user on the bandwidth tree before need change this moment to cell-level SRS band width configuration is configured, among the 0th grade of user before bandwidth tree changes, have 1 user A, the user class SRS bandwidth that this user A distributes is 36RB, in the tree structure after bandwidth tree changes, need the 0th grade of user before the reserved bandwidth tree changes, according to user class SRS bandwidth by the bandwidth tree after upwards search cell level SRS band width configuration changes step by step, the 0th grade of user on the bandwidth tree before cell-level SRS band width configuration changed is configured to the strategy that reconfigures on the appropriate level of SRS bandwidth change amplitude minimum of the bandwidth tree after the change, to the upwards search step by step of the tree structure after the bandwidth tree change, 3rd level is 4RB, the 2nd grade is 12RB, the 1st grade is 24RB, the 0th grade is 48RB, the appropriate level of the SRS bandwidth change amplitude minimum of the 0th grade (36RB) on the bandwidth tree before changing with cell-level SRS band width configuration as can be known be on the bandwidth tree after cell-level SRS band width configuration changes the 1st grade (24RB), promptly need be in the tree structure after bandwidth tree changes the 1st grade keeps user A, in the 1st grade of tree structure after bandwidth tree changes, can dispose the user class SRS bandwidth of 24RB for 2 users simultaneously, keep user A, can also be the another one user class SRS bandwidth that F distributes 24RB that Adds User simultaneously.Because variation has taken place in the user class SRS bandwidth of user A, promptly need to send RRC message to user A, carry user A in this message and be configured the information of the user class SRS bandwidth of 24RB, in the present embodiment, the base station also needs to send RRC message to user F, carried user E in this message and given the information of the user class SRS bandwidth of 24RB, detailed process is described in subsequent step S206, is not described in detail at this.

Step S206, the user class SRS bandwidth information after by RRC message user class SRS bandwidth being changed sends to the user in this sub-district.

In this step, user class SRS bandwidth information after user class SRS bandwidth changed sends to the user in this sub-district, and making needs to reconfigure the user of user class SRS bandwidth obtains this user in conjunction with this cell-level SRS band width configuration situation user class SRS bandwidth in this sub-district.

Concrete, in the present embodiment, the bandwidth of PUCCH becomes 2RB by 12RB, the tree structure of new cell-level SRS bandwidth tree is from original { 36,12,4} becomes { 48,24,12,4}, the base station can send to the user who needs to reconfigure user class SRS bandwidth in this sub-district with new user class SRS bandwidth information by the RRC message of 2 bits, and this user that need reconfigure user class SRS bandwidth is the user after user class SRS bandwidth changes, and has carried the user class SRS bandwidth information that need reconfigure user class SRS bandwidth in this RRC message.For example, when 0 of the 0th grade of correspondence 2 bit RRC message, 1 of the 1st grade of correspondence 2 bit RRC message, 2 of the 2nd grade of correspondence 2 bit RRC message, 3 o'clock of the corresponding 2 bit RRC message of 3rd level, when the RRC message that sends to the user's that need reconfigure user class SRS bandwidth 2 bits when the base station is 1, this user that need reconfigure user class SRS bandwidth confirms that then this user is the 1st grade, tree structure { 48 according to the new cell-level SRS bandwidth tree of obtaining, 24,12,4}, the SRS bandwidth that this user that need reconfigure user class SRS bandwidth can get access to this user is 24RB.In the present embodiment, structural user of original SRS bandwidth tree and inequality need reconfigure user class SRS bandwidth, when sending RRC message, only need RRC message is sent among the user that need reconfigure user class SRS bandwidth.The structural user of original SRS bandwidth tree is when receiving new cell-level SRS band width configuration, for the user who does not need to reconfigure user class SRS bandwidth, can get access to this user in the new structural rank of SRS bandwidth tree according to this user's user class SRS bandwidth, for example, original SRS bandwidth tree structure is { 36,12, the user that the last user class SRS bandwidth of 4} is 12RB, this user's user class SRS bandwidth is 12RB, just when this user received new cell-level SRS band width configuration, the tree structure that can get access to new cell-level SRS bandwidth tree became { 48,24,12,4}.Do not reconfigure the indication of user class SRS bandwidth when what this user received that the base station sends for this user, then this user's user class SRS bandwidth can not change, promptly this user's user class SRS bandwidth is 12RB, corresponding, this user is on the 2nd grade of the tree structure of new cell-level SRS bandwidth tree; Reconfigure the indication of user class SRS bandwidth when what this user received that the base station sends for this user, then this user obtains new user class SRS bandwidth according to the information in the indication, for example, when the information in the indication shows that this user's new user class SRS bandwidth is 4RB, corresponding, this user is on the 3rd level of the tree structure of new cell-level SRS bandwidth tree.Above-mentioned indication is the RRC message transmission that 2 bits are passed through in the base station, has carried new user class SRS bandwidth information in this message.

After user on the bandwidth tree before cell-level SRS band width configuration changes all disposes and finishes, in the tree structure of the bandwidth tree after cell-level SRS band width configuration changes, the 0th grade also is not assigned with away, at this moment, can be the user class SRS bandwidth of the G distribution 48RB that Adds User.At this moment, the base station need send RRC message to user G, has carried the user class SRS bandwidth information that user G has been given 48RB in this message.

In summary it can be seen, when the maximum bandwidth of cell-level SRS becomes big, in the tree structure after bandwidth tree changes, can reserved bandwidth set all users that change in the preceding tree structure, be that user a, b, c, d, e, f, g, h, i, B, C, D, A have all kept in the tree structure after bandwidth tree changes, and the tree structure after bandwidth tree changes can also be user l, m, n, E, F, the G distributing user level SRS bandwidth that does not have in the tree structure before the bandwidth tree change.

In the present embodiment, the user class SRS bandwidth of above-mentioned user a, b, c, d, e, f, g, h, i, B, C, D does not change, this moment, the base station did not need to send RRC message to user a, b, c, d, e, f, g, h, i, B, C, D, thereby had reduced the expense of RRC signaling.

In the present embodiment, the bandwidth change of PUCCH is for reducing, the bandwidth change of cell-level SRS is for increasing, by utilizing the cell-level SRS bandwidth that increases, be the configure user level SRS bandwidth that Adds User in the sub-district, for the user class SRS bandwidth of the configuration that Adds User in the sub-district to the appropriate level on should the wide tree of object tape; And the transmission indication that in this sub-district, Adds User, carry the appropriate level information on this target bandwidth tree in the indication into this user configured this user.Be that the base station can send to user A, l, m, n, E, F, G with user class SRS bandwidth value information by RRC message, make user A, l, m, n, E, F, G can get access to the user class SRS bandwidth in the tree structure of new bandwidth tree.

Optionally, can also comprise the step that the SRS bandwidth after changing is utilized, such as: step S205, the base station is measured UE according to the user class SRS bandwidth after changing.

Concrete, above-mentioned measurement includes but not limited to the channel quality of UE is measured, and the up timing of UE is measured.ENB is by measuring the SRS signal, can estimate up CQI (channel quality indication), and go up line frequency degree of recruiting according to up CQI, while eNB can measure UE by SRS up timing, issue TA (time adjustment) order, guarantee the uplink synchronous state of UE, wherein, SRS generally adopts the mode that periodically sends.Different SRS band width configuration algorithms has a significant impact estimation and the up timing measurement of up CQI, has determined frequently degree of recruiting and has kept the number of users that is in the RRC_CONNECT state, has also determined the overall performance of system.

As seen, in the embodiment of the invention, when the maximum bandwidth of cell-level SRS takes place to increase, the minimum strategy that reconfigures of the number of users that changes according to user class SRS bandwidth for principle, only to needing the user who reconfigures user class SRS bandwidth to reconfigure in the sub-district, and the user who only reconfigures user class SRS bandwidth to needs sends RRC message, thereby reduced the expense of RRC signaling.

Maximum bandwidth at cell-level SRS increases, and the number of users that changes according to user class SRS bandwidth is minimum during for the reconfiguring user before strategy changes cell-level SRS band width configuration and be configured of principle, can keep the user before all cell-level SRS band width configuration change, and can be newly-increased user's configure user level SRS bandwidth, make the base station when UE being measured, can obtain the information of subscriber equipmenies such as CQI more accurately according to the user class SRS bandwidth after changing.

The method of a kind of SRS band width configuration that the embodiment of the invention three proposes in the present embodiment, is 20MHz with the system bandwidth, and it is that example describes that the bandwidth of PUCCH becomes 25RB by 2RB, as shown in Figure 4, comprising:

Step S401, before the bandwidth of PUCCH changed, the base station sent to user in this sub-district by broadcast message with initial cell level SRS band width configuration.

Concrete, this cell-level SRS band width configuration is the tree structure of cell-level SRS bandwidth tree, for example, when system bandwidth is 20MHz, then the RB of system adds up to 100RB, be that the bandwidth of PUCCH and the summation of SRS bandwidth are 100RB to the maximum, promptly the summation of the bandwidth of PUCCH and SRS maximum bandwidth is 100RB to the maximum.When the bandwidth of PUCCH is not more than 4RB, promptly

N_{RB}^{PUCCH} \leq 4

The time, the tree structure of this cell-level SRS bandwidth tree be 96,48,24,4}, the bandwidth that is not more than 20RB and this PUCCH when the bandwidth of PUCCH is during greater than 4RB, promptly

4 < N_{RB}^{PUCCH} \leq 20

The time, the tree structure of this cell-level SRS bandwidth tree be 80,40,20,4}, the bandwidth that is not more than 28RB and this PUCCH when the bandwidth of PUCCH is during greater than 20RB, promptly

20 < N_{RB}^{PUCCH} \leq 28

The time, the tree structure of this cell-level SRS bandwidth tree is { 72,24,12,4}, in addition, the bandwidth of PUCCH also has other possibility, and the tree structure of corresponding district level SRS bandwidth tree also has other combination, and the tree structure one of this cell-level SRS bandwidth tree has 8 kinds in the application of reality, be that the broadcast message passed through sends to user in the sub-district, this broadcast message can be 3 bits.User storage in the sub-district combined situation of 8 kinds of bandwidth tree, after the user in this sub-district is receiving broadcast message from 3 bits of base station, obtain the tree structure of this sub-district corresponding district level SRS bandwidth tree according to the broadcast message of this 3 bit.

In the present embodiment, when the bandwidth of PUCCH is 2RB, the tree structure that the base station can get access to cell-level SRS bandwidth tree this moment is { 96,48,24,4}, the base station is according to the combined situation of 8 kinds of bandwidth tree, is { 96,48 with the tree structure of cell-level SRS bandwidth tree, 24, the broadcast message of the pairing information of 4} by 3 bits sends to the user in this sub-district.For example, the tree structure of cell-level SRS bandwidth tree is { 96,48,24,4} is positioned at the 4th in the combination of 8 kinds of bandwidth tree, the base station can be by 3 bits broadcast message with 3 users that send in this sub-district, after broadcast message that the user in the sub-district receives this 3 bit is 3, combined situation according to 8 kinds of bandwidth tree of this user memory storage, the tree structure that gets access to 3 pairing cell-level SRS bandwidth tree is { 96,48,24,4}, the assembled arrangement of employed 8 kinds of bandwidth tree was identical when the assembled arrangement of 8 kinds of bandwidth tree of user memory in sub-district storage can be with base station configuration.

Step S402, the base station sends to the user of this sub-district by RRC message with initial user level SRS bandwidth information, so that the user in this sub-district obtains this user's user class SRS bandwidth in conjunction with this cell-level SRS band width configuration situation.

Concrete, user class SRS bandwidth is each other value of level on the cell-level SRS bandwidth tree, in the tree structure of cell-level SRS bandwidth tree, the maximum degree of depth is 4, and 4 kinds of user class SRS bandwidth values are promptly arranged at most, comprise the 0th grade, the 1st grade, the 2nd grade, 3rd level, wherein, the 0th grade is highest level, and the bandwidth of distributing when distributing is the highest, 3rd level is minimum rank, and the bandwidth of distributing when distributing is minimum.In the present embodiment, when the bandwidth of PUCCH is 2RB, the tree structure of cell-level SRS bandwidth tree be 96,48,24,4}, the base station sends to initial user level SRS bandwidth information by RRC message the user of this sub-district.With this RRC message (or claiming signaling) is that 2 bits are example, for example, when 0 of the 0th grade of correspondence 2 bit RRC message, 1 of the 1st grade of correspondence 2 bit RRC message, 2 of the 2nd grade of correspondence 2 bit RRC message, 3 o'clock of the corresponding 2 bit RRC message of 3rd level, when the RRC message of 2 bits of the user in the base station sends to the sub-district is 1, user in this sub-district confirms that then this user is on the 1st grade of the tree structure of SRS bandwidth tree, and the tree structure of the cell-level SRS bandwidth tree that the user in this sub-district gets access to { 96,48,24, the user class SRS bandwidth that 4}, the user in this sub-district can get access to this user is 48RB.

After the tree structure of the bandwidth tree of SRS is determined, need on this tree structure the user's distributing user level SRS bandwidth in this sub-district.In the present embodiment, the tree structure of cell-level SRS bandwidth tree is { 96,48,24,4}, distributing user is specially on the tree structure of this cell-level SRS bandwidth tree: in 3rd level, be the user class SRS bandwidth of 4RB for each user distributes bandwidth, and the maximum bandwidth of this bandwidth tree is 96RB, can be that to distribute bandwidth be the user class SRS bandwidth of 4RB for 24 user a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x simultaneously.In the 2nd grade, the user class SRS bandwidth of distributing bandwidth 24RB for each user, and the maximum bandwidth of this bandwidth tree is 96RB can be that to distribute bandwidth be the user class SRS bandwidth of 24RB for 4 user D, E, F, G simultaneously.In the 1st grade, the user class SRS bandwidth of distributing bandwidth 48RB for each user, and the maximum bandwidth of this bandwidth tree is 96RB can be that to distribute bandwidth be the user class SRS bandwidth of 48RB for 2 user B, C simultaneously.In the 0th grade, the user class SRS bandwidth of distributing bandwidth 96RB for each user, and the maximum bandwidth of this bandwidth tree is 96RB, can be that 1 user A wears the wide user class SRS bandwidth of 96RB that is simultaneously.

Step S403, when the bandwidth of PUCCH increases, the base station will obtain the new cell-level SRS band width configuration of this sub-district according to the variation of PUCCH bandwidth.

In the sub-district, the bandwidth of PUCCH is provided by system broadcast message, is subjected to the influence of number of users, system loading and the descending scheduling strategy of system, and the bandwidth of PUCCH can change.And the summation of cell-level SRS maximum bandwidth and PUCCH bandwidth is no more than system bandwidth, and the frequency bandwidth that SRS takies can not overlap with the frequency band that PUCCH takies, and when the bandwidth of PUCCH changes, the SRS maximum bandwidth of cell-level also will change.In the present embodiment, when the bandwidth of PUCCH increased, the SRS bandwidth of cell-level will reduce according to the variation of PUCCH bandwidth.And when the SRS of cell-level bandwidth need change, the base station obtained the new cell-level SRS band width configuration of this sub-district according to the variation of PUCCH bandwidth.

Concrete, in the present embodiment, the supposing the system bandwidth is 20MHz, and the RB of system adds up to 100RB, and the summation of the bandwidth of PUCCH and SRS bandwidth is 100RB, and promptly the summation of the bandwidth of PUCCH and SRS maximum bandwidth is 100RB to the maximum.To become 25RB when the bandwidth of PUCCH by 2RB is example, then the tree structure of this cell-level SRS bandwidth tree will by 96,48,24, and 4} become 72,24,12,4}.

Step S404, the base station sends to user in this sub-district by broadcast message with the new cell-level SRS band width configuration of this sub-district.

Concrete, the broadcast message that the base station can be by 3 bits is that { 72,24,12, pairing 3 bit informations of 4} send to the user in this sub-district with the tree structure of cell-level SRS bandwidth tree.

Step S405, the base station is according to new cell-level SRS band width configuration, and the number of users that changes with user class SRS bandwidth minimum be the collocation strategy of principle, be defined as user configured user class SRS bandwidth in the sub-district.

Concrete, strategy for the user's configure user level SRS bandwidth in this sub-district on the SRS of new cell-level bandwidth tree includes but not limited to: the user on the bandwidth tree before 1) cell-level SRS band width configuration being changed according to first low level after high level order, be configured on the bandwidth tree after cell-level SRS band width configuration changes, to be the little user's configure user level SRS bandwidth of SRS bandwidth as far as possible, make the user's that the SRS bandwidth is little user class SRS bandwidth remain unchanged, number is many comparatively speaking owing to low-level user, can save the RRC signaling to greatest extent so take such strategy, and other user class bandwidth of lowermost level on the bandwidth tree after the minimum rank on the bandwidth tree of cell-level SRS band width configuration before changing and the change of cell-level SRS band width configuration is identical, be 4RB, make to need not sending RRC message during other user's configure user level of lowermost level SRS bandwidth on the bandwidth tree of cell-level SRS band width configuration before changing, thereby save the RRC signaling; 2) cell-level SRS band width configuration is changed the user class SRS bandwidth of user on the preceding bandwidth tree and the user class SRS bandwidth on the bandwidth tree after the change of cell-level SRS band width configuration and carry out size relatively, and search for step by step according to high level order after the first low level, on the appropriate level of the bandwidth tree after the cell-level SRS band width configuration that the user before cell-level SRS band width configuration changed on the bandwidth tree is configured to bandwidth change amplitude minimum changes, to reduce the variation of user class SRS bandwidth as far as possible, and obtain maximum user class SRS bandwidth, make the base station can obtain more user equipment information when UE being measured according to user class SRS; 3) after choosing suitable configure user level SRS bandwidth-level, in the time of on the corresponding level of the bandwidth tree after the user on the bandwidth tree before the change of cell-level SRS band width configuration can't all be configured to the change of cell-level SRS band width configuration, the even lower level that user on the bandwidth tree before the change of cell-level SRS band width configuration is configured to the bandwidth tree institute corresponding level after cell-level SRS band width configuration changes does not go up, to satisfy the configuration requirement of user class SRS bandwidth, make the base station can obtain user equipment information accurately when UE being measured according to user class SRS.

After the tree structure of the bandwidth tree of SRS is determined, need on this tree structure the user's distributing user level SRS bandwidth in this sub-district.In the scene that present embodiment provides, when the bandwidth of the PUCCH in the sub-district became 25RB by 2RB, when the maximum bandwidth of this SRS then became 72RB by 96RB, the variation of the tree structure of the bandwidth tree of this cell-level SRS as shown in Figure 5.In the present embodiment, the tree structure of cell-level SRS bandwidth tree is { 72,24,12,4}, distributing user is specially on this tree structure: in the 3rd level, be the user class SRS bandwidth of 4RB for each user distributes bandwidth, and the maximum bandwidth of this bandwidth tree is 72RB, can be 18 user's distributing user level SRS bandwidth simultaneously; In the 2nd grade, be the user class SRS bandwidth of 12RB for each user distributes bandwidth, and the maximum bandwidth of this bandwidth tree is 72RB, can be 6 user's distributing user level SRS bandwidth simultaneously; In the 1st grade, be the user class SRS bandwidth of 24RB for each user distributes bandwidth, and the maximum bandwidth of this bandwidth tree is 72RB, can be 3 user's distributing user level SRS bandwidth simultaneously; In the 0th grade, be the user class SRS bandwidth of 72RB for each user distributes bandwidth, and the maximum bandwidth of this bandwidth tree is 72RB, can only distribute the user class SRS bandwidth of 72RB for 1 user.

In the present embodiment, the user class SRS bandwidth information that can distribute for the user on the tree structure according to the bandwidth tree that reconfigures strategy and above-mentioned SRS that reduces user that user class SRS bandwidth changes be the user's configure user level SRS bandwidth on the bandwidth tree before cell-level SRS band width configuration changes, be specifically as follows: other user of lowermost level on the bandwidth tree before cell-level SRS band width configuration is changed is configured on the minimum rank of the bandwidth tree after cell-level SRS band width configuration changes, and described minimum rank is the 3rd level of described bandwidth tree; Be clipped to the high-level 3rd level, the 2nd grade, the 1st grade, the 0th grade of being followed successively by from rudimentary; Correspond in the present embodiment, on the tree structure of new SRS bandwidth tree during distributing user, need to distribute from the preceding lower-level user of the bandwidth tree change of cell-level SRS earlier, promptly distribute the 3rd level user before bandwidth tree changes earlier, among the 3rd level user before bandwidth tree changes, have 24 user a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x, for each user distributes bandwidth is the user class SRS bandwidth of 4RB, in the tree structure after bandwidth tree changes, need the 3rd level user before the reserved bandwidth tree changes, promptly need keep user a at the 3rd level in the tree structure after bandwidth tree changes, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x, and in the 3rd level of the tree structure after bandwidth tree changes, can only dispose the user class SRS bandwidth of 4RB for 18 users simultaneously, promptly the user that can keep is a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, at this moment, can not be user s, t, u, v, w, x has distributed the user class SRS bandwidth of 4RB, and 3rd level is minimum rank, can't be user s in next stage, t, u, v, w, x distributes bandwidth.Because the user class SRS bandwidth of user a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r does not change, just need not send RRC message, thereby save the RRC signaling to user a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r.In the present embodiment, user s, t, u, v, w, x are not assigned to user class SRS bandwidth, and the base station need be to user s, t, u, v, w, x message, have carried user s, t, u, v in this message, w, x do not have distributing user level SRS bandwidth information.

After 3rd level user configuration on the bandwidth tree before cell-level SRS band width configuration changes is finished, the 2nd grade of user that this cell-level SRS band width configuration is changed on the preceding bandwidth tree is configured, user class SRS bandwidth by the bandwidth tree after upwards search cell level SRS band width configuration changes step by step, the 2nd grade of user on the bandwidth tree before cell-level SRS band width configuration changed is configured on the appropriate level of SRS bandwidth change amplitude minimum of the bandwidth tree after the change, in the time of on the appropriate level of the bandwidth tree after the SRS band width configuration that the 2nd grade of user on the bandwidth tree before cell-level SRS band width configuration changes can't be configured to bandwidth change amplitude minimum changes, the even lower level of the bandwidth tree after the SRS band width configuration that the 2nd grade of user on the bandwidth tree before this cell-level SRS band width configuration changed is configured to bandwidth change amplitude minimum changes does not go up; Correspond in the present embodiment, on the tree structure of new SRS bandwidth tree during distributing user, the 2nd grade of user on the bandwidth tree before need change this moment to cell-level SRS band width configuration is configured, among the 2nd grade of user before bandwidth tree changes, have 4 user D, E, F, G, the user class SRS bandwidth that each user distributes is 24RB, in the tree structure after bandwidth tree changes, need the 2nd grade of user before the reserved bandwidth tree changes, promptly need be at the reservation user D in the tree structure after bandwidth tree changes, E, F, G, according to user class SRS bandwidth by the bandwidth tree after upwards search cell level SRS band width configuration changes step by step, the 2nd grade of user on the bandwidth tree before cell-level SRS band width configuration changed is configured to the strategy that reconfigures on the appropriate level of SRS bandwidth change amplitude minimum of the bandwidth tree after the change, to the upwards search step by step of the tree structure after the bandwidth tree change, 3rd level is 4RB, the 2nd grade is 12RB, the 1st grade is 24RB, the 0th grade is 72RB, the appropriate level of the SRS bandwidth change amplitude minimum of the 2nd grade (24RB) on the bandwidth tree before changing with cell-level SRS band width configuration as can be known be on the bandwidth tree after cell-level SRS band width configuration changes the 1st grade (24RB), promptly need keep user D on the 1st grade in the tree structure after bandwidth tree changes, E, F, G, in the 1st grade of tree structure after bandwidth tree changes, can dispose the user class SRS bandwidth of 24RB for 3 users simultaneously, at this moment, can keep user D, E, F, with user D, E, F is assigned in the 1st grade of tree structure after bandwidth tree changes, at this moment, can not be for the bandwidth of user G configure user level SRS bandwidth 24RB, in the time of on the appropriate level of the bandwidth tree after the SRS band width configuration that can't be configured to bandwidth change amplitude minimum according to the 2nd grade of user on the bandwidth tree before cell-level SRS band width configuration changes changes, the even lower level of the bandwidth tree after the SRS band width configuration that the 2nd grade of user on the bandwidth tree before this cell-level SRS band width configuration changed is configured to bandwidth change amplitude minimum changes does not go up reconfigures strategy, the even lower level that user G can be assigned to the 2nd grade of bandwidth tree after cell-level SRS band width configuration changes does not go up, at this moment, user G need be assigned on the third level of the bandwidth tree after cell-level SRS band width configuration changes, be the user class SRS bandwidth of user G configuration 12RB.Because the user class SRS bandwidth of user D, E, F does not change, just need not send RRC message to user D, E, F, thereby saved the RRC signaling, in the present embodiment, the base station need send RRC message to user G, carried the information that user G has been given the user class SRS bandwidth of 12RB in this message.

After the 2nd grade of user's configuration on the bandwidth tree before cell-level SRS band width configuration changes finished, the 1st grade of user that this cell-level SRS band width configuration is changed on the preceding bandwidth tree is configured, user class SRS bandwidth by the bandwidth tree after upwards search cell level SRS band width configuration changes step by step, the 1st grade of user on the bandwidth tree before cell-level SRS band width configuration changed is configured on the appropriate level of SRS bandwidth change amplitude minimum of the bandwidth tree after the change, in the time of on the appropriate level of the bandwidth tree after the SRS band width configuration that the 1st grade of user on the bandwidth tree before cell-level SRS band width configuration changes can't be configured to bandwidth change amplitude minimum changes, the even lower level of the bandwidth tree after the SRS band width configuration that the 1st grade of user on the bandwidth tree before this cell-level SRS band width configuration changed is configured to bandwidth change amplitude minimum changes does not go up; Correspond in the present embodiment, on the tree structure of new SRS bandwidth tree during distributing user, the 1st grade of user on the bandwidth tree before need change this moment to cell-level SRS band width configuration is configured, among the 1st grade of user before bandwidth tree changes, have 2 user B, C, the user class SRS bandwidth that each user distributes is 48RB, in the tree structure after bandwidth tree changes, need the 1st grade of user before the reserved bandwidth tree changes, promptly need be at the reservation user B in the tree structure after bandwidth tree changes, C, according to user class SRS bandwidth by the bandwidth tree after upwards search cell level SRS band width configuration changes step by step, the 1st grade of user on the bandwidth tree before cell-level SRS band width configuration changed is configured to the strategy that reconfigures on the appropriate level of SRS bandwidth change amplitude minimum of the bandwidth tree after the change, to the upwards search step by step of the tree structure after the bandwidth tree change, 3rd level is 4RB, the 2nd grade is 12RB, the 1st grade is 24RB, the 0th grade is 72RB, the appropriate level of the SRS bandwidth change amplitude minimum of the 1st grade (48RB) on the bandwidth tree before changing with cell-level SRS band width configuration as can be known be on the bandwidth tree after cell-level SRS band width configuration changes the 1st grade (24RB), promptly can keep user B on the 1st grade in the tree structure after bandwidth tree changes, C, at this moment, in the 1st grade of tree structure after bandwidth tree changes, be 3 user D, E, the user class SRS bandwidth of F configuration 24RB, not having unnecessary user class SRS bandwidth is other user's configure user level SRS bandwidth, when promptly needing to be configured on the appropriate level of the bandwidth tree after the SRS band width configuration change of bandwidth change amplitude minimum according to the 1st grade of user on the bandwidth tree before cell-level SRS band width configuration changes, the even lower level of the bandwidth tree after the SRS band width configuration that the 1st grade of user on the bandwidth tree before this cell-level SRS band width configuration changed is configured to bandwidth change amplitude minimum changes does not go up reconfigures strategy, with user B, the even lower level that C is assigned to the 2nd grade of bandwidth tree after cell-level SRS band width configuration changes does not go up, at this moment, need be with user B, C is assigned on the third level of the bandwidth tree after cell-level SRS band width configuration changes, and is user B, the user class SRS bandwidth of C configuration 12RB.Because variation has taken place in the user class SRS bandwidth of user B, C, then the base station also needs to send RRC message to user B, C, carried user B, C in this message and be configured the information of the user class SRS bandwidth of 12RB, detailed process is described in subsequent step S406, is not described in detail at this.

After the 1st grade of user's configuration on the bandwidth tree before cell-level SRS band width configuration changes finished, the 0th grade of user that this cell-level SRS band width configuration is changed on the preceding bandwidth tree is configured, user class SRS bandwidth by the bandwidth tree after upwards search cell level SRS band width configuration changes step by step, the 0th grade of user on the bandwidth tree before cell-level SRS band width configuration changed is configured on the appropriate level of SRS bandwidth change amplitude minimum of the bandwidth tree after the change, in the time of on the appropriate level of the bandwidth tree after the SRS band width configuration that the 0th grade of user on the bandwidth tree before cell-level SRS band width configuration changes can't be configured to bandwidth change amplitude minimum changes, the even lower level of the bandwidth tree after the SRS band width configuration that the 1st grade of user on the bandwidth tree before this cell-level SRS band width configuration changed is configured to bandwidth change amplitude minimum changes does not go up; Correspond in the present embodiment, on the tree structure of new SRS bandwidth tree during distributing user, the 0th grade of user on the bandwidth tree before need change this moment to cell-level SRS band width configuration is configured, among the 0th grade of user before bandwidth tree changes, have 1 user A, the user class SRS bandwidth that this user A is assigned with is 96RB, in the tree structure after bandwidth tree changes, need the 0th grade of user before the reserved bandwidth tree changes, promptly need be at the reservation user A in the tree structure after bandwidth tree changes, according to user class SRS bandwidth by the bandwidth tree after upwards search cell level SRS band width configuration changes step by step, the 0th grade of user on the bandwidth tree before cell-level SRS band width configuration changed is configured to the strategy that reconfigures on the appropriate level of SRS bandwidth change amplitude minimum of the bandwidth tree after the change, to the upwards search step by step of the tree structure after the bandwidth tree change, 3rd level is 4RB, the 2nd grade is 12RB, the 1st grade is 24RB, the 0th grade is 72RB, the appropriate level of the SRS bandwidth change amplitude minimum of the 0th grade (96RB) on the bandwidth tree before changing with cell-level SRS band width configuration as can be known be on the bandwidth tree after cell-level SRS band width configuration changes the 0th grade (72RB), promptly can keep user A on the 0th grade in the tree structure after bandwidth tree changes, at this moment, in the 0th grade of tree structure after bandwidth tree changes, can dispose the user class SRS bandwidth of 72RB for a user, promptly the 0th grade in the tree structure after bandwidth tree changes is the user class SRS bandwidth of user A configuration 72RB.Because variation has taken place in the user class SRS bandwidth of user A, then the base station need send RRC message to user A, carried user A in this message and be configured the information of the user class SRS bandwidth of 72RB, detailed process is described in subsequent step S406, is not described in detail at this.

Step S406, the user class SRS bandwidth information after by RRC message user class SRS bandwidth being changed sends to the user in this sub-district.

Concrete, in the present embodiment, the bandwidth of PUCCH becomes 25RB by 2RB, the tree structure of new cell-level SRS bandwidth tree is from original { 96,48,24,4} becomes { 72,24,12,4}, the base station can send to the user who needs to reconfigure user class SRS bandwidth in this sub-district with new user class SRS bandwidth information by the RRC message of 2 bits, this user that need reconfigure user class SRS bandwidth is the user after user class SRS bandwidth changes, and has carried the user class SRS bandwidth information that need reconfigure user class SRS bandwidth in this RRC message.For example, when 0 of the 0th grade of correspondence 2 bit RRC message, 1 of the 1st grade of correspondence 2 bit RRC message, 2 of the 2nd grade of correspondence 2 bit RRC message, 3 o'clock of the corresponding 2 bit RRC message of 3rd level, when the RRC message that sends to the user's that need reconfigure user class SRS bandwidth 2 bits when the base station is 1, this user that need reconfigure user class SRS bandwidth confirms that then this user is the 1st grade, tree structure { 72 according to the new cell-level SRS bandwidth tree of obtaining, 24,12,4}, the SRS bandwidth that this user that need reconfigure user class SRS bandwidth can get access to this user is 24RB.In the present embodiment, structural user of original SRS bandwidth tree and inequality need reconfigure user class SRS bandwidth, when sending RRC message, only need RRC message is sent among the user that need reconfigure user class SRS bandwidth.The structural user of original SRS bandwidth tree is when receiving new cell-level SRS band width configuration, for the user who does not need to reconfigure user class SRS bandwidth, can get access to this user in the new structural rank of SRS bandwidth tree according to this user's user class SRS bandwidth, for example, original SRS bandwidth tree structure is { 96,48,24, the user that the last user class SRS bandwidth of 4} is 24RB, this user's user class SRS bandwidth is 24RB, just when this user receives new cell-level SRS band width configuration, the tree structure that can get access to new cell-level SRS bandwidth tree becomes { 72,24,12,4}.Do not reconfigure the indication of user class SRS bandwidth when what this user received that the base station sends for this user, then this user's user class SRS bandwidth can not change, promptly this user's user class SRS bandwidth is 24RB, corresponding, this user is on the 1st grade of the tree structure of new cell-level SRS bandwidth tree; Reconfigure the indication of user class SRS bandwidth when what this user received that the base station sends for this user, then this user obtains new user class SRS bandwidth according to the information in the indication, for example, when the information in the indication shows that this user's new user class SRS bandwidth is 12RB, corresponding, this user is on the 2nd grade of the tree structure of new cell-level SRS bandwidth tree.Above-mentioned indication is the RRC message transmission that 2 bits are passed through in the base station, has carried new user class SRS bandwidth information in this message.

User on the bandwidth tree before cell-level SRS band width configuration changes is after all configuration is finished, and in the tree structure of the bandwidth tree after the change of cell-level SRS band width configuration, can also dispose the user class SRS bandwidth of 12RB in the 2nd grade for 3 newly-increased users.At this moment, the base station need send RRC message to 3 newly-increased users, has carried 3 user class SRS bandwidth information that Add User and be configured 12RB in this message.

In summary it can be seen, when the maximum bandwidth of SRS will diminish, in the tree structure after bandwidth tree changes, can reserved bandwidth set a of certain customers, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, A, B, C, D, E, F, the G that changes in the preceding tree structure, in the present embodiment, can also be the user class SRS bandwidth of 3 configuration 12RB that Add User.

In the present embodiment, the user class SRS bandwidth of above-mentioned user a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, D, E, F does not all change, this moment, the base station did not need to send RRC message to user a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, D, E, F, thereby had reduced the expense of RRC signaling.

In the present embodiment, the base station can send to user G, B, C, A and 3 with user class SRS bandwidth value information by RRC message and Add User, and makes user G, B, C, A and 3 Add User can to get access to user class SRS bandwidth in the tree structure of new bandwidth tree.

Optionally, can also comprise the step that the SRS bandwidth after changing is utilized, such as: step S405, the base station is measured UE according to the user class SRS bandwidth after changing.

Concrete, above-mentioned measurement includes but not limited to the channel quality of UE is measured, and the up timing of UE is measured.ENB can estimate up CQI, and go up line frequency degree of recruiting according to up CQI by measuring the SRS signal, eNB issues the TA order by the up timing that SRS can measure UE simultaneously, guarantees the uplink synchronous state of UE, wherein, SRS generally adopts the mode that periodically sends.Different SRS band width configuration algorithms has a significant impact estimation and the up timing measurement of up CQI, has determined frequently degree of recruiting and has kept the number of users that is in the RRC_CONNECT state, has also determined the overall performance of system.

As seen, in the embodiment of the invention, when reducing by maximum bandwidth at cell-level SRS, the minimum strategy that reconfigures of the number of users that changes according to user class SRS bandwidth for principle, only to needing the user who reconfigures user class SRS bandwidth to reconfigure in the sub-district, and the user who only reconfigures user class SRS bandwidth to needs sends RRC message, thereby reduced the expense of RRC signaling.

Maximum bandwidth at cell-level SRS increases, and the number of users that changes according to user class SRS bandwidth is minimum during for the reconfiguring user before strategy changes cell-level SRS band width configuration and be configured of principle, can keep the user before cell-level SRS band width configuration changes as far as possible, user's maximum before making the cell-level SRS band width configuration that is kept change, and can be newly-increased user's configure user level SRS bandwidth, make the base station when UE being measured, can obtain the information of subscriber equipmenies such as CQI accurately according to the user class SRS bandwidth after changing.

A kind of device that disposes the SRS bandwidth that the embodiment of the invention four proposes, the device of this configuration SRS bandwidth is the base station in the Long Term Evolution planning system.As shown in Figure 6, comprising:

Memory module 61 is used to store SRS band width configuration strategy, and the number of users that this strategy changes with user class SRS bandwidth is minimum to be principle;

Configuration module 62 is used for according to the SRS band width configuration strategy that this memory module 61 is stored, being defined as user configured user class SRS bandwidth in the sub-district when cell-level SRS band width configuration changes and triggers configuration to user class SRS bandwidth;

Indicating module 63 is used for sending indication to the user that user class SRS bandwidth changes, the user class SRS bandwidth information after the user class SRS bandwidth of carrying this user of configuration module 62 configuration in this indication changes.

Further, this cell-level SRS band width configuration adopts bandwidth tree to represent, this bandwidth tree comprises the target bandwidth tree after cell-level SRS band width configuration changes preceding source bandwidth tree and the change of cell-level SRS band width configuration; This configuration module 62 comprises:

First dispensing unit 621, be used for to the user on this source bandwidth tree according to first low level after high level order dispose step by step, in the configuration of each grade, user as much as possible is configured on the appropriate level that the SRS bandwidth remains unchanged on the target bandwidth tree.

Second dispensing unit 622 is used for for the layoutprocedure of each grade being failed to keep the constant user of user class SRS bandwidth at this first dispensing unit, is configured on the appropriate level of target bandwidth tree of user class SRS bandwidth change amplitude minimum.

The 3rd dispensing unit 623, be used for the user for the appropriate level of the target bandwidth tree that can't be configured to user class SRS bandwidth change amplitude minimum at this second dispensing unit in the layoutprocedure to each grade, the even lower level that is configured to target bandwidth tree appropriate level does not go up.

The embodiment of the invention has also proposed a kind of system of SRS bandwidth reprovision, comprise the user who uses the SRS bandwidth in the device of above-mentioned configuration SRS bandwidth and the sub-district, wherein: the device of configuration SRS bandwidth is used to store SRS band width configuration strategy, and the number of users that this strategy changes with user class SRS bandwidth is minimum to be principle; When cell-level SRS band width configuration changes and triggers configuration to user class SRS bandwidth,, be defined as user configured user class SRS bandwidth in the sub-district according to the SRS band width configuration strategy of this storage; And the user who changes to user class SRS bandwidth sends indication, the user class SRS bandwidth information after the user class SRS bandwidth of carrying this user in this indication changes.

Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by hardware, also can realize by the mode that software adds the necessary hardware platform.Based on such understanding, technical scheme of the present invention can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, comprise some instructions with so that computer equipment (can be personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.

The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be looked protection scope of the present invention.

Claims

1, a kind of method of reference signal detection SRS band width configuration is characterized in that, comprising:

2, the method for claim 1 is characterized in that, described cell-level SRS band width configuration adopts bandwidth tree to represent, described bandwidth tree comprises the target bandwidth tree after cell-level SRS band width configuration changes preceding source bandwidth tree and the change of cell-level SRS band width configuration;

The number of users that described basis changes with user class SRS bandwidth is minimum to be the collocation strategy of principle, is defined as that user configured user class SRS bandwidth comprises in the sub-district:

To the user on the bandwidth tree of described source according to first low level after high level order dispose step by step, in the configuration of each grade, user as much as possible is configured on the appropriate level that user class SRS bandwidth remains unchanged on the described target bandwidth tree.

3, method as claimed in claim 2 is characterized in that, after user as much as possible being configured on the appropriate level that user class SRS bandwidth remains unchanged on the described target bandwidth tree, also comprises:

In the configuration of each grade, keep the constant user of user class SRS bandwidth for failing, be configured on the appropriate level of target bandwidth tree of user class SRS bandwidth change amplitude minimum.

4, method as claimed in claim 3 is characterized in that, is keeping the constant user of user class SRS bandwidth for failing, be configured on the appropriate level of target bandwidth tree of user class SRS bandwidth change amplitude minimum after, also comprise:

In the configuration of each grade, when failing to keep the constant user of user class SRS bandwidth can't all be configured on the appropriate level of target bandwidth tree of user class SRS bandwidth change amplitude minimum, the even lower level that the user that can't be configured to described appropriate level is configured to described target bandwidth tree appropriate level does not go up.

As each described method of claim 2 to 4, it is characterized in that 5, the described user who changes to user class SRS bandwidth sends indication, the user class SRS bandwidth information of carrying in the described indication after described user class SRS bandwidth changes comprises:

The user who changes to described user class SRS bandwidth sends indication, carries the appropriate level information on described target bandwidth tree into described user configured described user in the described indication.

6, method as claimed in claim 5 is characterized in that, the band width configuration of described cell-level SRS changes and comprises:

The bandwidth change of Physical Uplink Control Channel PUCCH causes the bandwidth change of described cell-level SRS, thereby triggering cell level SRS band width configuration changes.

7, method as claimed in claim 6 is characterized in that, the bandwidth change of described PUCCH is for reducing, and the bandwidth change of described cell-level SRS is for increasing, and described method also comprises:

Utilize the cell-level SRS bandwidth that increases, be the configure user level SRS bandwidth that Adds User in the described sub-district, the appropriate level on the corresponding described target bandwidth tree of described user class SRS bandwidth for the configuration that Adds User in the sub-district;

Adding User in described sub-district sends indication, carries the appropriate level information on described target bandwidth tree into described user configured described user in the described indication.

8, a kind of device that disposes the SRS bandwidth is characterized in that, comprising:

9, device as claimed in claim 8 is characterized in that, described cell-level SRS band width configuration adopts bandwidth tree to represent, described bandwidth tree comprises the target bandwidth tree after cell-level SRS band width configuration changes preceding source bandwidth tree and the change of cell-level SRS band width configuration;

Described configuration module comprises:

First dispensing unit, be used for to the user on the bandwidth tree of described source according to first low level after high level order dispose step by step, in the configuration of each grade, user as much as possible is configured on the appropriate level that the SRS bandwidth remains unchanged on the target bandwidth tree.

10, device as claimed in claim 9 is characterized in that, described configuration module also comprises:

Second dispensing unit is used for for the layoutprocedure of each grade being failed to keep the constant user of user class SRS bandwidth at described first dispensing unit, is configured on the appropriate level of target bandwidth tree of user class SRS bandwidth change amplitude minimum.

11, device as claimed in claim 10 is characterized in that, described configuration module also comprises:

The 3rd dispensing unit, be used for the user for the appropriate level of the target bandwidth tree that can't be configured to user class SRS bandwidth change amplitude minimum at described second dispensing unit in the layoutprocedure to each grade, the even lower level that is configured to target bandwidth tree appropriate level does not go up.

As each described device of claim 8 to 11, it is characterized in that 12, the device of described configuration SRS bandwidth is the base station in the Long Term Evolution plan LTE system.

13, a kind of system that disposes the SRS bandwidth is characterized in that, comprising: as the arbitrary described device of claim 8-12, and the user who uses the SRS bandwidth in the sub-district.