CN103298114B - The resource allocation method and device of uplink pilot signal in communication system - Google Patents
The resource allocation method and device of uplink pilot signal in communication system Download PDFInfo
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- CN103298114B CN103298114B CN201210045196.7A CN201210045196A CN103298114B CN 103298114 B CN103298114 B CN 103298114B CN 201210045196 A CN201210045196 A CN 201210045196A CN 103298114 B CN103298114 B CN 103298114B
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Abstract
The embodiment of the invention discloses a kind of resource allocation method of uplink pilot signal and devices, are applied to multi-cell communication systems.This method comprises: obtaining the cell specific configuration information that at least two base stations are directed to uplink pilot signal；The cooperation specific configuration information of uplink pilot signal is determined according to the cell specific configuration information；It to the user for meeting preset condition to be used to send uplink pilot signal the cooperation resource reservation of the cooperation specific configuration information instruction, is used for the user for not meeting preset condition that other resources at least two base station in the resource of the cell specific configuration information instruction of the uplink pilot signal of each base station in addition to the cooperation resource are allocated to the base station to send uplink pilot signal.The present invention marks off the cooperation resource only used for meeting the user of preset condition from the communication resource for be used for transmission uplink pilot signal, do not allow to use to other users, to avoid interference of the user for not meeting preset condition to the uplink pilot signal for the user for meeting preset condition.
Description
Technical field
The present embodiments relate to wireless communication technology field, in particular to uplink pilot signal in a kind of communication system
Resource allocation method and device.
Background technique
Uplink pilot signal includes the demodulated reference signal (DeModulation for the demodulation of base station upstream data
Reference Signal, DMRS) and for uplink signal-channel quality measurement detection reference signal (Sounding Reference
Signal, SRS).
In existing system, base station needs to distribute uplink pilot signal transmission money for the user in itself coverage cell
Source, and the uplink pilot signal of user's transmission is received for estimating up channel.Specifically, each cell has respective
The uplink pilot signal for this intra-cell users cell-specific resource distribution, base station is by the cell-specific resource of this cell
The indicated resource allocation of configuration gives the user of this cell serves.Each user sends uplink to base station using the resource of base station distribution
Pilot signal.In this case, base station avoids these users by distributing different resources for the different user in this cell
Uplink pilot signal between interfere with each other.But the resource that user is used to send uplink pilot signal in this cell may
The user in neighboring community is distributed to for sending data or other uplink signals, therefore, this community user by other base stations
Uplink pilot signal may be subjected to the interference of the user uplink signal in neighboring community.It is especially upper when this community user
Row pilot signal strength is weaker, for example, due to user be located at cell edge and with base station distance farther out when, neighbor cell interference
It influences just bigger.
In addition, the boundary that multipoint cooperative (Coordinated Multi-Point, CoMP) technology can be improved cell is handled up
Amount and average throughput, are accordingly regarded as one of the key technology of the subsequent evolution of LTE.CoMP technology refers to geographical location dispersion
Multiple transmission point is the same user service by specific cooperation mode (such as joint transmission, Combined Treatment, cooperative scheduling).
Wherein, multiple transmission point can be the base station with full resource management module, baseband processing module and radio frequency unit, either
The multiple radio frequency units and antenna (such as spaced antenna) of geographical location inequality or relay node etc..Using CoMP technology
When, multiple base stations (being hereinafter cooperative base station) for carrying out cooperation transmission need to receive the CoMP service for enjoying multiple base stations
The uplink pilot signal that user's (being hereinafter collaboration user) sends, to carry out the collaboration user to this multiple cooperative base station
Uplink channel estimation.That is, a base station, which needs to receive, is located at the uplink pilot signal that the collaboration user of other cells is sent.
And do not have in existing system for the resource allocation mechanism using uplink pilot signal when CoMP technology, it is one small
User in area may be used for for sending uplink pilot signal or the resource of upstream data with the collaboration user in another cell
The resource for sending uplink pilot signal is identical.When the base station of the cell is the cooperative base station of the collaboration user, cooperative base station is needed
It receives the uplink pilot signal of collaboration user and extracts some channel parameters for cooperation transmission.At this moment, due to collaboration user
Farther out apart from cooperative base station, uplink signal strength is weaker, the ascending pilot frequency letter of the user of this cell that cooperative base station receives
Number or upstream data signals can cause stronger interference to the uplink pilot signal of collaboration user, to cooperate to the base station
Transmission has an adverse effect.For example, participating in multiple base stations of cooperation, to can use detection reference signal (SRS) multiple small to obtain
The downlink channel condition information (CSIT) in area is to provide better CoMP service for collaboration user.For TDD system, by
In there are channel reciprocity, the method for obtaining the CSIT of multiple cells using SRS is especially effective.The version of long term evolution (LTE)
10 (R10) are independently dispatched using each cell by the way of SRS.It is more since LTE R10 does not support multiple cell SRS to cooperate
The SRS transmission of a cell can be interfered with each other or be interfered with data transmission, so as to cause according to multiple cell SRS channel estimations
Obtained multiple cell CSIT mass are badly damaged, and are unable to satisfy the requirement of CoMP.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of resource allocation method of uplink pilot signal in communication system and
Device reduces the interference that the uplink signal of neighboring community generates the uplink pilot signal of user.
The embodiment of the invention provides a kind of resource allocation methods of uplink pilot signal, are applied to multi-cell communication system
System characterized by comprising
Obtain the cell specific configuration information that at least two base stations in the communication system are directed to uplink pilot signal；
The cooperation specialized configuration of uplink pilot signal is determined according to the cell specific configuration information of at least two base station
Information；
The user for meeting preset condition to be used to send the cooperation resource reservation of the cooperation specific configuration information instruction
Uplink pilot signal indicates the cell specific configuration information of the uplink pilot signal of each base station at least two base station
Resource in except it is described cooperation resource in addition to other resources be allocated to the base station do not meet the preset condition user use
In transmission uplink pilot signal；
The cell specific configuration information according at least two base stations determines the cooperation specialized configuration of uplink pilot signal
Information includes:
The resource indicated for the cell specific configuration information of at least two base station takes union to be used as cooperation resource, and raw
At the cooperation specific configuration information for being used to indicate the cooperation resource；Or
The resource indicated for the cell specific configuration information of at least two base station takes union, from preset resource collection
It is middle to select have one or more resource collections of intersection as the resource that cooperates with the union, and generate and be used to indicate the cooperation
The cooperation specific configuration information of resource.
The embodiment of the invention provides a kind of device for allocating resources of uplink pilot signal, are applied to multi-cell communication system
System, comprising:
Configuration obtains module, the cell-specific for being directed to uplink pilot signal for obtaining at least two base stations in the base station
Configuration information；
Cooperative arrangement determining module is determined for obtaining the cell specific configuration information that module obtains according to the configuration
The cooperation specific configuration information of row pilot signal；
Wherein, the cooperation resource reservation of the cooperation specific configuration information instruction gives the user for meeting preset condition for sending out
Send uplink pilot signal；
The cooperative arrangement determining module is used for: for the money of the cell specific configuration information instruction of at least two base station
Source takes union as cooperation resource, and generates the cooperation specific configuration information for being used to indicate the cooperation resource；Alternatively, being described
At least two base stations cell specific configuration information instruction resource take union, from preset resource collection selection with it is described simultaneously
Collection has one or more resource collections of intersection as cooperation resource, and generate be used to indicate the cooperation resource cooperation it is dedicated
Configuration information.
The embodiment of the invention provides a kind of base stations, positioned at the communication system of multiple cell, comprising:
Configuration obtains module, for obtaining in this base station and the base station at least one second base station for ascending pilot frequency letter
Number cell specific configuration information；
Cooperative arrangement determining module determines that uplink is led for obtaining the cell specific configuration information that module obtains according to configuration
The cooperation specific configuration information of frequency signal；
Resource distribution module, for the cooperation resource reservation of the cooperation specific configuration information instruction to be met default item
The user of part will remove the cooperation in the resource of the cell specific configuration information instruction of this base station for sending uplink pilot signal
Other resources other than resource are allocated to the user for not meeting preset condition of this base station for sending uplink pilot signal；
The cooperative arrangement determining module is used for: for the money of the cell specific configuration information instruction of at least two base station
Source takes union as cooperation resource, and generates the cooperation specific configuration information for being used to indicate the cooperation resource；Alternatively, being described
At least two base stations cell specific configuration information instruction resource take union, from preset resource collection selection with it is described simultaneously
Collection has one or more resource collections of intersection as cooperation resource, and generate be used to indicate the cooperation resource cooperation it is dedicated
Configuration information.
As seen from the above technical solutions, method and apparatus provided in an embodiment of the present invention can be used for transmission ascending pilot frequency
Cooperation resource is specially marked off in the communication resource of signal, and the collaboration user at least two base station range is kept for make
With.Reserved cooperation resource does not allow to be assigned to ordinary user's use, that is, the ordinary user in the region does not allow using association
Make resource, to avoid interference of the common UE to the uplink pilot signal of cooperation UE.
Detailed description of the invention
Fig. 1 is the process of the resource allocation method of uplink pilot signal in a kind of communication system provided in an embodiment of the present invention
Figure.
Fig. 2 is a kind of structural schematic diagram of the device for allocating resources of uplink pilot signal provided in an embodiment of the present invention.
Fig. 3 is a kind of flow chart of the resource allocation method of uplink pilot signal provided in an embodiment of the present invention.
Fig. 4 is a kind of composition schematic diagram of communication system provided in an embodiment of the present invention.
Fig. 5 is a kind of structural schematic diagram of base station provided in an embodiment of the present invention.
Fig. 6 is a kind of composition schematic diagram of communication system provided in an embodiment of the present invention.
Fig. 7 is a kind of flow chart of the resource allocation method of uplink pilot signal provided in an embodiment of the present invention.
Fig. 8 is the reserved and distribution mechanism schematic diagram in an example for the cooperation resource of SRS signal.
Fig. 9 is the schematic illustration that orthogonal covering codes are used in an example.
Figure 10 is the flow chart of the resource allocation method of uplink pilot signal in one embodiment of the invention.
Specific embodiment
For the objects, technical solutions and advantages of the embodiment of the present invention are more clearly understood, develop simultaneously referring to the drawings
The embodiment of the present invention is further described in embodiment.
Fig. 1 shows the stream of the resource allocation method of uplink pilot signal in a kind of communication system provided in an embodiment of the present invention
Cheng Tu.As shown in Figure 1, this method mainly includes the following steps.
Step 101, the cell specific configuration information that at least two base stations are directed to uplink pilot signal is obtained.
Step 102, the cooperation of uplink pilot signal is determined according to the cell specific configuration information of at least two base station
Specific configuration information.
Step 103, the cooperation resource reservation of the cooperation specific configuration information instruction is given to the user for meeting preset condition
For sending uplink pilot signal, will be removed in the resource of the cell specific configuration information instruction of the uplink pilot signal of the base station
Other resources other than the cooperation resource are allocated to the user for not meeting preset condition for sending uplink pilot signal.
The above method specially marks off cooperation resource in the communication resource for being used for transmission uplink pilot signal, keeps for this
The user for meeting preset condition at least two base station ranges uses.Reserved cooperation resource does not allow to be assigned to not
The user for meeting preset condition uses, to avoid interfering with each other between these users.For example, when this method is applied to support
It include that CoMP clothes can be provided for collaboration user in the communication system when in the wireless communication system of cooperative multi-point (CoMP) transmission
The base station of business, the user for meeting preset condition is collaboration user, and the user for not meeting preset condition is that non-cooperating is used
Family (being hereinafter ordinary user), the ordinary user at least two base station range do not allow using cooperation resource,
To avoid interference of the common UE to the uplink pilot signal of cooperation UE；When this method is applied to common multi-cell communication systems
When, the user for meeting preset condition can be the intensity for its uplink signal that the base station receives or signal adds with interference
Noise ratio (SINR) is lower than the user of pre-determined threshold, the uplink signal strength or SINR at least two base station range compared with
High user does not allow using cooperation resource, so that the UE for avoiding signal strength good believes the ascending pilot frequency of the UE of difference in signal strength
Number generate interference.
Wherein, at least two above-mentioned base stations can be the base station for arbitrarily having cooperation relation, such as adjacent base station, or belong to
Base station etc. in the same Cooperation group (cluster).
Cell specific configuration information is matched for the resource for being exclusively used in transmission uplink pilot signal of the user preset in cell
Confidence breath, different cells can have different cell specific configuration information.
The bandwidth and the position in time domain and frequency domain that the cooperation specific configuration information is used to indicate the cooperation resource
It sets.The cooperation resource can be what time domain and/or frequency domain periodically occurred, can be a frequency of concentration on frequency domain
Section is also possible to the set of several frequency ranges of distribution.
The above method can be completed by a device independently of base station, can also be realized by base station, be illustrated individually below
Explanation.
Fig. 2 is a kind of device for allocating resources of uplink pilot signal provided in an embodiment of the present invention.As shown in Fig. 2, the dress
200 are set to specifically include that
Configuration obtains module 201, the cell for being directed to uplink pilot signal for obtaining at least two base stations in communication system
Specific configuration information；
Cooperative arrangement determining module 202, it is true for obtaining the cell specific configuration information that module obtains according to the configuration
Determine the cooperation specific configuration information of uplink pilot signal；Wherein, the cooperation resource reservation of the cooperation specific configuration information instruction
It is used to send uplink pilot signal to the user for meeting preset condition.
Above-mentioned configuration obtains module 201 and cooperative arrangement determining module 202 is only the logic divided by function
Module, when realization, can be realized by same module, can also divide and be realized by multiple submodule.It only lists above and the present invention program
Related functional module, in fact, the device can also include other modules.For example, the device can also include: centre
Manage unit (CPU) 203, memory module 204, communication module 205, internal bus 206 etc..Above-mentioned configuration obtains module 201 and association
The function of making configuration determining module 202 may need other modules to assist when realizing, such as CPU 203 is needed to carry out data fortune
It calculates, memory module 204 is used to store cooperation specific configuration information, the communication module 206 of each cell specific configuration information and determination
For carrying out information exchange etc. at least two base station, for simplicity, these functions are described as being obtained by configuration
Module 201 and cooperative arrangement determining module 202 are completed.Internal bus 206 then provides the information interaction passage of each intermodule, can be with
It is the bus of each module of connection, can also be made of a plurality of route between above-mentioned modules.
Above-mentioned apparatus can be applied to support the communication system of CoMP, include that can mention for collaboration user in the communication system
For the base station of CoMP service, then the user for meeting preset condition is the collaboration user, described not meet the default item
The user of part is ordinary user.Above-mentioned apparatus also can be applied to common multi-cell communication systems, then described to meet preset condition
User can be its uplink signal that the base station receives intensity or SINR be lower than pre-determined threshold user.
Above-mentioned apparatus can be an independent equipment in above-mentioned communication system, be also possible in above-mentioned communication system one
Module in existing device.In latter situation, then above-mentioned module 201-206 can be newly-installed module, be also possible to benefit
It is realized with module existing in existing device.
The device can carry out information exchange by the base station in communication module 206 and the communication system.This information is handed over
It mutually can be directly, be also possible to carry out transfer by other equipment or network.The communication connection of the device and base station can
To be wired connection, it is also possible to be wirelessly connected, existing communication protocol can be used, it can also be using the communication specially designed
Agreement.
The device obtain at least two base station need cell specific configuration information can be receive base station actively or
It should request to be sent to the device, or be read by the device from each base station or a specific equipment.
Fig. 3 is a kind of flow chart of the resource allocation method of uplink pilot signal provided in an embodiment of the present invention.This method
Applied in communication system 400 shown in Fig. 4.The communication system 400 includes base station 401-40n, user terminal 411-41n, with
And device for allocating resources 430, i.e., device for allocating resources 200 shown in Fig. 2.As shown in figure 3, this method mainly includes following step
Suddenly.
Step 301, device for allocating resources obtains the cell that at least two base stations in communication system are directed to uplink pilot signal
Specific configuration information.
Step 302, device for allocating resources obtains the cell specific configuration information that module obtains according to the configuration and determines association
Make specific configuration information, and is supplied at least two base station.
Step 303, base station receives the cooperation specific configuration information, by the cooperation of the cooperation specific configuration information instruction
Resource reservation to collaboration user for sending uplink pilot signal, will the base station the instruction of cell specific configuration information resource in
Other resources in addition to the cooperation resource are allocated to the ordinary user of the base station for sending uplink pilot signal.
In step 302, the cooperative arrangement determining module 202 of device 200 can be according to the cell of at least two base station
The resource of specific configuration information instruction determines the cooperation resource according to scheduled strategy.For example, can be described at least two
The resource of the cell specific configuration information instruction of base station takes intersection or union as cooperation resource, and generate be used to indicate it is described
The cooperation specific configuration information for the resource that cooperates；Alternatively, the money of the cell specific configuration information instruction at least two base station
Source takes intersection, and perhaps union selects have the one or more of intersection to provide with the intersection or union from preset resource collection
Source set generates the cooperation specific configuration information for being used to indicate the cooperation resource as cooperation resource, etc..
In step 302, the cooperative arrangement determining module 202 of device 200 can be according to the number of collaboration user and ordinary user
Mesh come determine cooperation resource bandwidth.For example, can be according to the number of the collaboration user at least two base station range
The ratio of the ratio of the number of mesh and ordinary user or the number of collaboration user and total number of users is from for sending ascending pilot frequency letter
Number total bandwidth in mark off the total amount of bandwidth of the bandwidth of same ratio as the cooperation resource, such as collaboration user number and common
When the ratio of number of users is 1:5, i.e., the ratio of collaboration user number and total number of users is 1:6, then can mark off for sending
The bandwidth resources of 1/6 size of the total bandwidth of row pilot signal are as cooperation resource；Alternatively, number or association when collaboration user
Make the ratio of the ratio of the number of user and the number of ordinary user or the number of collaboration user and total number of users greater than preset
When threshold value, using preset bandwidth corresponding with the threshold value as the total amount of bandwidth of the cooperation resource, if for example, can preset
The corresponding relationship of dry threshold value and bandwidth, then determines corresponding association according to practical collaboration user number and/or total number of users
Make the bandwidth of resource.It can also be using other strategies, for example, the priority that can set collaboration user and ordinary user is closed
System indicates the preferential communication quality for ensureing collaboration user or ordinary user, at this point it is possible to preferential to enjoy according to priority relationship
User group distribute more bandwidth resources.For example, when the preferential communication quality for ensureing collaboration user is arranged in system, device
200 can first determine the bandwidth of cooperation resource according to the above method, increase default ratio on the basis of the amount of bandwidth then obtained again
Total bandwidth of the bandwidth of example as cooperation resource.
In this way, the cooperation resource allocation that conditioning unit 430 divides can be used to send out by base station 401-40n to collaboration user
Uplink pilot signal is sent, without allowing ordinary user to use the cooperation resource, so as to avoid the uplink signal pair of ordinary user
The interference of the uplink pilot signal of collaboration user.
In the embodiment, the base station 401-40n in the communication system 400 supports CoMP.Those skilled in the art only need
Scheme above be simply adaptively adjusted and the above method can be applied to other systems, such as common multiple cell
System.
Method described in Fig. 1 can also be realized by base station.Fig. 5 is that a kind of structure of base station provided in an embodiment of the present invention is shown
It is intended to.As shown in figure 5, base station 500 specifically includes that
Configuration obtains module 501, for obtaining this base station and at least one second base station for the small of uplink pilot signal
Area's specific configuration information；
Cooperative arrangement determining module 502 is determined for obtaining the cell specific configuration information that module obtains according to configuration
The cooperation specific configuration information of row pilot signal；
Resource distribution module 510, for the cooperation resource reservation of the cooperation specific configuration information instruction is pre- to meeting
If except described in the resource that for sending uplink pilot signal, the cell specific configuration information of this base station is indicated by the user of condition
Other resources other than cooperation resource are allocated to the user for not meeting preset condition of this base station for sending uplink pilot signal.
Above-mentioned configuration obtain module 501, cooperative arrangement determining module 502 and resource distribution module 510 be only by function into
Row divides obtained logic module, and when realization can be realized by same module, can also divide and be realized by multiple submodule.Above only
Functional module related with the present invention program is listed, in fact, the device can also include other modules.For example, the device
It can also include: central processing unit (CPU) 503, memory module 504, communication module 505, internal bus 506, wireless receiving and dispatching
Module 507 etc..As previously mentioned, the function of above-mentioned module 501,502 and 510 may need other modules to assist when realizing, it is
For purpose of brevity, it is described as being completed by above-mentioned module 501,502 and 510.Internal bus 506 then provides the information of each intermodule
Interaction channel can be the bus of each module of connection, can also be made of a plurality of route between above-mentioned modules.
Above-mentioned module 501-506 can be newly-installed module in base station, be also possible to real using the existing module in base station
It is existing.
Information exchange can be carried out by respective communication module 506 between base station.This information exchange can be directly
, it is also possible to carry out transfer by other equipment or network；It can be by wired connection, also using wireless connection.
The cell specific configuration information that base station obtains other base stations, which can be, to be received other base stations actively or should request to send out
The device is given, or is read by the device from each base station or a specific equipment.
Fig. 7 is a kind of flow chart of the resource allocation method of uplink pilot signal provided in an embodiment of the present invention.This method
Applied to communication system 600 as shown in FIG. 6.It include base station 601-60n and user terminal 611-61n in the communication system 600.
Wherein base station 601-60n uses base station 500 shown in fig. 5.As shown in fig. 7, this method mainly includes the following steps.
Step 701, first base station obtains first base station and at least one second base station is directed to the cell of uplink pilot signal
Specific configuration information.
Step 702, first base station determines that the cooperation of uplink pilot signal is dedicated according to the cell specific configuration information of acquisition
Configuration information.
Step 703, first base station uses the cooperation resource reservation of the cooperation specific configuration information instruction to collaboration user
In transmission uplink pilot signal, the resource that the cell specific configuration information of the base station is indicated in addition to the cooperation resource
Other resources are allocated to the ordinary user of the base station for sending uplink pilot signal.
In step 702, the cooperative arrangement determining module 502 of base station 500 determines the method and abovementioned steps 302 of cooperation resource
The method that the cooperative arrangement determining module 202 of middle device 200 uses is identical, and which is not described herein again.
In the above method, first base station and at least one described second base station can be the base station or any of cooperation relation
Several adjacent base stations etc., such as belong to the base station etc. in the same cluster.Base according to preparatory configuration, in cluster
It stands and interacts respective cell specific configuration information, for example, receiving the cell specific configuration information of other base stations in cluster and inciting somebody to action
The cell specific configuration information of itself is supplied to other base stations in cluster.
Voluntarily decision obtains cooperation resource for each base station, if tactful identical, the association that different base stations is determined of configuration
It will be identical for making resource.Alternatively, the main base for being responsible for determining cooperation resource can be pre-configured in each cluster
It stands, the cell specific configuration information of itself is supplied to the master base station by other base stations, and master base station generates use after determining cooperation resource
In the cooperation specific configuration information for indicating the cooperation resource and it is supplied to other base stations.Again alternatively, each base station can basis
Certain strategy being pre-configured determines alternative cooperation resource, the information for the alternative cooperation resource that then each base station interaction respectively determines,
Negotiate to determine the cooperation resource that the cluster is finally used.The present invention determines that the mode of cooperation resource does not limit to multiple base stations
It is fixed.
In the embodiment, the base station 601-60n in the communication system 600 supports CoMP.Those skilled in the art only need
Scheme above be simply adaptively adjusted and the above method can be applied to other systems, such as common multiple cell
System.
Using the scheme of the various embodiments described above, base station is obtained with cooperation specific configuration information, and matches from cooperation is dedicated
Suitable resource allocation is selected to the user for meeting preset condition in itself coverage area in the cooperation resource of confidence breath instruction
For sending uplink pilot signal, and the user for not allowing not meeting preset condition uses the cooperation resource, so as to
Avoid interference of the latter user to former user.
Base station is to meet user's distribution of preset condition for sending out according to the cooperation resource of cooperation specific configuration information instruction
Send uplink pilot signal resource may include: base station selected from the cooperation resource first resource distribute to this base station covering
The first user for meeting the preset condition in range is for sending uplink pilot signal；From the cell specific configuration of the cell
Selection resource allocation is not met the preset condition in resource in the resource of information instruction in addition to the cooperation resource
Second user is for sending uplink pilot signal.Wherein, base station cannot will cooperate resource allocation to the use for not meeting preset condition
Family, the user for not meeting preset condition do not allow using cooperation resource.The step can be held by the resource distribution module in base station
Row.
First resource is used for the second user for meeting preset condition in this base station and second base station range
The Secondary resource for sending uplink pilot signal is different.For example, first resource can use different frequency or frequency from Secondary resource
Section or different subcarriers or t easet ofasubcarriers etc..
Base station is determining as user's distribution for can be generated and be used to indicate after sending the resource of uplink pilot signal
User's specific configuration information of the resource is simultaneously sent to collaboration user.
Base station determined from cooperation resource the resource that specifically uses of some user can by the resource progress time domain that will cooperate,
Resource allocation after division is given and meets the different users of preset condition as above-mentioned first resource by the division of frequency domain, code domain,
To realize the time-division between collaboration user, frequency division, code point.Fig. 8 is shown in an example for the cooperation resource of SRS signal
Reserved and distribution mechanism schematic diagram.
It is different for example, can be multiple frequency ranges by the bandwidth partition for the resource that cooperates in a manner of frequency division multiplexing (FDM)
User distributes different frequency ranges as above-mentioned first resource；It can also be multiple subcarriers by the bandwidth partition for the resource that cooperates, it will
The set of different sub-carrier distributes to different users as above-mentioned first resource.
In the case where using subcarrier, frequency comb (Comb) can also be defined according to different subcarrier spacings.For not
Same user, which distributes different Comb, can distinguish different users, and distributing different Comb for the user positioned at different community can
To distinguish the user of different community.In the later case, the Comb that each cell uses can be filled by the resource distribution concentrated
Determination is set, can also be held consultation by multiple base stations or is determined according to preset strategy.
The pilot frequency sequence of different user is generated according to the different cyclic shifts (CS) of basic sequence, different user in similar frequency bands
Pilot frequency sequence be distinguish by different Comb and CS.The maximum value of the CS supported in agreement at present is the maximum of 8, comb
Value is 2, then the maximum multiplexing capacity of SRS is 16 in similar frequency bands.
According to one embodiment of present invention, more a variety of Comb and less CS number can be used, while making its product
It is constant, such as keeping product is 16.For example, base station can determine 4 kinds of Comb from the cooperation resource, with basic sequence
4 kinds of cyclic shift combination of two obtain 16 different combination of resources；Alternatively, base station determines 8 kinds from the cooperation resource
Comb, and 2 kinds of cyclic shift combination of two of basic sequence combination of resources that obtain 16 different are different from described 16
One is chosen in combination of resources is used as the first resource.Reducing while increasing Comb number according to the scheme of the present embodiment makes
CS number can increase the flexibility of scheduling under the premise of guaranteeing channel state information (CSI) quality.Certainly, above scheme
It is not only adapted to the distribution of cooperation resource, it is also general to be suitable for ordinary user's distribution resource；And it is applicable not only to DMRS and SRS,
It is also applied for other types of uplink signal.
According to one embodiment of present invention, the precoding of collaboration user is also supported in base station.Base station can will be above-mentioned symbol
The information of the pre-coding matrix for the user's distribution for closing preset condition is supplied to the user for sending uplink pilot signal.It is described
User carries out precoding to sent uplink pilot signal using the pre-coding matrix, by the ascending pilot frequency Jing Guo precoding
Signal issues in the cooperation resource of distribution.
Precoding configuration can also use the side based on non-code book using based on by the way of code book (codebook)
Formula.
In codebook-based mode, base station pre-defines the set of several code words (codeword), i.e. code book, then will choosing
Index (index) notice of fixed code word carries out pre-encode operation to SRS using the code word that base station is specified to UE, UE.
In mode based on non-code book, base station only notifies whether UE carries out the equivalent aerial end after precoding and precoding
Which kind of pre-coding matrix is mouth number use without specified UE, and UE can voluntarily select pre-coding matrix.
LTE R10 does not support to carry out pre-encode operation to SRS at present, but permits in the case where being directed to SRS in the present embodiment yet
Perhaps collaboration user uses precoding, to save SRS code resource, and signal energy is focused on narrower direction in space,
Improve the signal quality of collaboration user.
In one embodiment of the present of invention, different users is distinguished using different orthogonal covering codes (OCC).
First base station can distribute the first orthogonal covering codes for the first user, and the first user utilizes the first orthogonal covering codes pair
Uplink pilot signal symbol to be sent is weighted, and the uplink pilot signal after weighting is sent out in the cooperation resource of distribution
Out.Wherein, in the first orthogonal covering codes and the second base station range and the occupied resource part or identical that cooperates
The second orthogonal covering codes that second user uses are different.
This scheme is particularly suitable for TDD system.For TDD system, if UpPTS only has 1 SC-FDMA symbol
Number, then the symbol can be used for SRS transmission；If UpPTS has 2 SC-FDMA symbols, this 2 symbols may be used to
SRS transmission, and the same UE can be distributed to and used.By using the scheme of preceding embodiment, 2 in UpPTS are used as
In the SC-FDMA symbol of SRS, a dedicated search coverage is marked off, i.e. the region is only used for meeting the user of preset condition
SRS.At this point, can be accorded in the dedicated search coverage of this 2 symbols to meet 2 SRS of user of preset condition
The weighting operations of orthogonal covering codes number are introduced, so as to distinguish by orthogonal covering codes and its with the combination of FDM or Comb
Different user, as collaboration user (CoMP-UE) or uplink signal strength or SINR are lower than the user of pre-determined threshold.
Introduce orthogonal covering codes can more fully utilize time, frequency, code resource, for example, can be the first user and
Two user's distribution portions are identical or identical resource is used for uplink, the two use are only distinguished by orthogonal covering codes
Family.
Fig. 9 shows the schematic illustration that orthogonal covering codes are used in an example.In figure, a user utilizes {+1 ,+1 }
As orthogonal covering codes, processing is weighted to 2 SRS symbols；Another user then utilizes {+1, -1 } to be used as orthogonal covering
2 SRS symbols are weighted processing by code.By above-mentioned processing, the SRS of the two users is orthogonal.
By using orthogonal covering codes, the flexibility of base station scheduling can be increased, improve the signal quality of user.It is different small
When the user of different community is distinguished in area using different orthogonal covering codes, it is possible to reduce dry between the user of different community
It disturbs.
Certainly, above-mentioned that collaboration user can be not only used for using the scheme of orthogonal covering codes, it can be also used for ordinary user,
And it is suitable for various uplink pilot signals.It, can also be with moreover, the above-mentioned scheme using orthogonal covering codes can be used alone
Other schemes, such as above-mentioned FDM, Comb, CS scheme are applied in combination, for distinguishing different users.
In addition, cooperation resource supports frequency hopping in one embodiment of the present of invention.
In addition, the bandwidth of the cooperation resource and period occur be also dynamically to adjust.For example, when the bandwidth of cooperation resource
When being determined according to the number of collaboration user, can trigger cooperation resource under preset conditions redefines or adjusts process.
Preset condition can be scheduled duration, amplitude of variation of collaboration user number etc..When preset condition meets, cooperation money
The determination process in source can re-execute once to update the resource that cooperates；Alternatively, can be according to the number of variations feelings of collaboration user
Condition increases or decreases cooperation resource on the basis of currently used cooperation resource.
Help understanding of the technical staff to the present invention program for a specific example below.The example uses for SRS
It is illustrated, those skilled in the art should will easily can be adjusted and be used for other types of ascending pilot frequency letter
Number.
Figure 10 is the flow chart of the resource allocation method of uplink pilot signal in one embodiment of the invention.Such as Figure 10 institute
Show, this method may comprise steps of.
Step 1001, in the SC-FDMA symbol for SRS transmission, confidence is matched according to the cell-specific SRS of multiple cells
Breath determines one or more dedicated search coverages that cooperate.
Step 1002, the resource reservation in the dedicated search coverage of the cooperation is used to send SRS, each base station to collaboration user
Resource in the resource that the cell-specific SRS configuration information of this cell is indicated in addition to the resource of the dedicated search coverage of the cooperation
The ordinary user of the cell is allocated to for sending SRS.That is, the resource in the dedicated search coverage of the cooperation is only used for assisting
Make user and send SRS, does not allow ordinary user to use.
Step 1003, the resource in the dedicated search coverage of the cooperation is marked off a variety of different Comb by base station.
Step 1004, in the case where the total SRS multiplexing order 16 of holding is constant, increasing the Comb number used and reducing makes
CS number, that is, by 4 or 2 cyclic shift (CS) combination of two of 4 kinds or 8 kinds Comb and basic sequences, form 16
Different alternative resource groups.
Step 1005, base station selects a not used set of resources dispensing collaboration user for sending out from alternative resource group
Send SRS.
Step 1006, base station is that the collaboration user distributes pre-coding matrix and orthogonal covering codes, and by pre-coding matrix
The collaboration user is sent to the information of orthogonal covering codes.
Step 1007, the collaboration user is generated pending using the cyclic shift of the basic sequence in the resource group of base station distribution
The SRS sequence sent, and carry out precoding to sent SRS sequence and handled using the weighting of orthogonal covering codes, it will be by pre-
Coding and weighting treated SRS sequence are issued using the Comb in the resource group.
It should be noted that step and module not all in above-mentioned each process and each structure chart be all it is necessary, can
To ignore certain steps or module according to the actual needs.Each step execution sequence be not it is fixed, can according to need into
Row adjustment.The division of each module is intended merely to facilitate the division functionally that description uses, and in actual implementation, a module can
It is realized with point by multiple modules, the function of multiple modules can also be realized by the same module, these modules can be located at same
In a equipment, it can also be located in different equipment.In addition, middle use " first ", " second " is described above just to convenient
Two objects with same meaning are distinguished, its tangible difference is not offered as.
The scheme of the embodiment of the present invention is by reserving cooperation private resource, it is possible to reduce to realize multiple cell SRS associations
Signalling exchange expense needed for making.Meanwhile avoiding and being interfered with each other with ordinary user, maintain backwards compatibility.It is cooperating
In private resource, it can realize that the SRS of different user is orthogonal by Comb and/or OCC, ensure that multiple cell CSIT's
Quality, and without specially reserving SRS basic sequence for cooperation.Meanwhile the collaboration user of different community can use the spy simultaneously
Region is surveyed, the level of resources utilization is improved.Meanwhile increasing the Comb number used and being also beneficial to increase dispatching flexibility.
In conclusion being not intended to limit the scope of the present invention the above is only section Example of the invention.
All any modification, equivalent replacement, improvement and so within the scope of the present invention, should be included in protection scope of the present invention
Within.
Claims (18)
1. a kind of resource allocation method of uplink pilot signal is applied to multi-cell communication systems characterized by comprising
Obtain the cell specific configuration information that at least two base stations in the communication system are directed to uplink pilot signal；
The cooperation specific configuration information of uplink pilot signal is determined according to the cell specific configuration information of at least two base station；
The user for meeting preset condition to be used to send uplink the cooperation resource reservation of the cooperation specific configuration information instruction
Pilot signal, by the money of the cell specific configuration information instruction of the uplink pilot signal of each base station at least two base station
Other resources in source in addition to the cooperation resource are allocated to the user for not meeting the preset condition of the base station for sending out
Send uplink pilot signal；
The cell specific configuration information according at least two base stations determines the cooperation specific configuration information of uplink pilot signal
Include:
The resource indicated for the cell specific configuration information of at least two base station takes union as cooperation resource, and generates use
In the cooperation specific configuration information for indicating the cooperation resource；Or
The resource indicated for the cell specific configuration information of at least two base station takes union, selects from preset resource collection
The one or more resource collections for having intersection with the union are selected as the resource that cooperates, and generates and is used to indicate the cooperation resource
Cooperation specific configuration information.
2. the method as described in claim 1, which is characterized in that the method is applied to support the communication of cooperative multi-point (CoMP)
System includes that the base station serviced CoMP, the user for meeting preset condition can be provided for collaboration user in the communication system
For the collaboration user, the user for not meeting the preset condition is ordinary user；
It is described to determine that cooperation specific configuration information includes: according to the cell specific configuration information of at least two base stations
According to the ratio or association of the number of the collaboration user at least two base station range and the number of ordinary user
The ratio of the number and total number of users of making user marks off same ratio from the total bandwidth for sending uplink pilot signal
Total amount of bandwidth of the bandwidth as the cooperation resource；Or
When the number of the number of collaboration user or the ratio or collaboration user of the number of collaboration user and the number of ordinary user with
When the ratio of total number of users is greater than preset threshold value, using preset bandwidth corresponding with the threshold value as the cooperation resource
Total amount of bandwidth.
3. the method as described in claim 1, which is characterized in that further comprise:
First base station at least two base station selects first resource from the cooperation resource and distributes to first base
Meet the first user of preset condition in coverage area of standing for sending uplink pilot signal, the first resource and it is described at least
The Secondary resource that the second user for meeting preset condition in two base station ranges is used to send uplink pilot signal is different.
4. method as claimed in claim 3, which is characterized in that the first resource and Secondary resource use different subcarriers
Set.
5. method as claimed in claim 3, which is characterized in that selected from the cooperation resource first resource distribute to it is described
The first user for meeting preset condition in first base station coverage area is used to send uplink pilot signal
M subcarrier spacings (Comb) is determined from the cooperation resource, the N kind cyclic shift combination of two with a basic sequence
Obtain 16 different combination of resources；Wherein, the value of M, N are 2 and 8 or 4 and 4 or 8 and 2 or 16 and 1；
One is chosen from 16 different combination of resources is used as the first resource.
6. the method as described in claim 1, which is characterized in that further comprise:
First base station at least two base station is to meet the first of preset condition in the first base station coverage area to use
The first orthogonal covering codes are distributed for sending uplink pilot signal in family, wherein the first orthogonal covering codes and at least two base
Meet preset condition and occupied cooperate resource part or identical second user use second in coverage area of standing
Orthogonal covering codes are different；
First user is carried out using first orthogonal covering codes to sent at least two uplink pilot signal symbols
Weighting, the uplink pilot signal after weighting is issued in the cooperation resource of distribution；Wherein, the uplink pilot signal being weighted
The equal length of symbol numbers and orthogonal covering codes.
7. the method as described in claim 1, which is characterized in that further comprise:
The pre-coding matrix that first base station at least two base station distributes the first user to meet preset condition
Information is supplied to the first user for sending uplink pilot signal；
First user carries out precoding to sent uplink pilot signal using the pre-coding matrix, will be by prelisting
The uplink pilot signal of code issues in the cooperation resource of distribution.
8. the method as described in any claim in claim 1,4-7, which is characterized in that
The intensity or signal for its uplink signal that the user for meeting preset condition receives for the base station add with interference makes an uproar
Acoustic ratio (SINR) is lower than the user of pre-determined threshold；Or
The method is applied to support the communication system of cooperative multi-point (CoMP), and including in the communication system can be collaboration user
The base station of service CoMP is provided, the user for meeting preset condition is the collaboration user, described not meet the default item
The user of part is ordinary user.
9. a kind of device for allocating resources of uplink pilot signal is applied to multi-cell communication systems characterized by comprising
Configuration obtains module, the cell-specific for being directed to uplink pilot signal for obtaining at least two base stations in the communication system
Configuration information；
Cooperative arrangement determining module determines that uplink is led for obtaining the cell specific configuration information that module obtains according to the configuration
The cooperation specific configuration information of frequency signal；
Wherein, the cooperation resource reservation of the cooperation specific configuration information instruction gives the user for meeting preset condition for sending
Row pilot signal；
The cooperative arrangement determining module is used for: the resource for the cell specific configuration information instruction of at least two base station takes
Union generates the cooperation specific configuration information for being used to indicate the cooperation resource as cooperation resource；Alternatively, for described at least
The resource of the cell specific configuration information instruction of two base stations takes union, selects to have with the union from preset resource collection
One or more resource collections of intersection generate the cooperation specialized configuration for being used to indicate the cooperation resource as cooperation resource
Information.
10. device as claimed in claim 9, which is characterized in that include that can be provided for collaboration user in the communication system
The base station of CoMP service, the user for meeting preset condition are the collaboration user, do not meet the user of the preset condition
For ordinary user；
The cooperative arrangement determining module is used for: according to the number of the collaboration user at least two base station range with
The ratio of the ratio of the number of ordinary user or the number of collaboration user and total number of users is from for sending uplink pilot signal
Total amount of bandwidth of the bandwidth of same ratio as the cooperation resource is marked off in total bandwidth；Alternatively, when collaboration user number,
Or the ratio of number or the number of collaboration user of the number and ordinary user of collaboration user and the ratio of total number of users are greater than in advance
If threshold value when, using preset bandwidth corresponding with the threshold value as it is described cooperation resource total amount of bandwidth.
11. a kind of base station, positioned at the communication system of multiple cell characterized by comprising
Configuration obtains module, the cell-specific for being directed to uplink pilot signal for obtaining at least two base stations in the communication system
Configuration information, wherein at least two base station includes this base station and at least one second base station；
Cooperative arrangement determining module determines that ascending pilot frequency is believed for obtaining the cell specific configuration information that module obtains according to configuration
Number cooperation specific configuration information；
Resource distribution module, for the cooperation resource reservation of the cooperation specific configuration information instruction to be met preset condition
User will remove the cooperation resource in the resource of the cell specific configuration information instruction of this base station for sending uplink pilot signal
Other resources in addition are allocated to the user for not meeting preset condition of this base station for sending uplink pilot signal；
The cooperative arrangement determining module is used for: the resource for the cell specific configuration information instruction of at least two base station takes
Union generates the cooperation specific configuration information for being used to indicate the cooperation resource as cooperation resource；Alternatively, for described at least
The resource of the cell specific configuration information instruction of two base stations takes union, selects to have with the union from preset resource collection
One or more resource collections of intersection generate the cooperation specialized configuration for being used to indicate the cooperation resource as cooperation resource
Information.
12. base station as claimed in claim 11, which is characterized in that the base station can at least one of the communication system its
Its base station collaboration for collaboration user provide CoMP service, the user for meeting preset condition be the collaboration user, it is described not
The user for meeting the preset condition is ordinary user；
The cooperative arrangement determining module is used for: according to the number of the collaboration user at least two base station range with
The ratio of the ratio of the number of ordinary user or the number of collaboration user and total number of users is from for sending uplink pilot signal
Total amount of bandwidth of the bandwidth of same ratio as the cooperation resource is marked off in total bandwidth；Alternatively, when collaboration user number,
Or the ratio of number or the number of collaboration user of the number and ordinary user of collaboration user and the ratio of total number of users are greater than in advance
If threshold value when, using preset bandwidth corresponding with the threshold value as it is described cooperation resource total amount of bandwidth.
13. base station as claimed in claim 11, which is characterized in that
The resource distribution module is further used for selecting first resource from the cooperation resource and distributes to this base station covering model
Meet the first user of preset condition in enclosing for sending uplink pilot signal；Wherein, the first resource and this base station and institute
It is different to state Secondary resource of the second user for meeting preset condition in the second base station range for sending uplink pilot signal.
14. base station as claimed in claim 13, which is characterized in that
The resource distribution module is used to from the cooperation resource select from Secondary resource using different t easet ofasubcarriers
First resource distributes to the first user for sending uplink pilot signal.
15. base station as claimed in claim 13, which is characterized in that
The resource distribution module is used to determine M subcarrier spacings (Comb) from the cooperation resource, with a basic sequence
N kind cyclic shift combination of two obtain 16 different combination of resources；One is chosen from 16 different combination of resources
It is a to be used as the first resource；Wherein, the value of M and N is 2 and 8 or 4 and 4 or 8 and 2 or 16 and 1.
16. base station as claimed in claim 11, which is characterized in that
The resource distribution module is further used for meeting the first user of preset condition the first orthogonal covering codes of distribution and being used for
First user is weighted using the first orthogonal covering codes to sent at least two uplink pilot signal symbols, wherein the
Meet preset condition and the occupied Resources Department that cooperates in one orthogonal covering codes and at least one described second base station range
Divide or the second orthogonal covering codes of identical second user use are different, the symbol numbers for the uplink pilot signal being weighted
With the equal length of orthogonal covering codes.
17. base station as claimed in claim 11, which is characterized in that
The resource distribution module is further used for being the letter for meeting the pre-coding matrix of the first user distribution of preset condition
Breath is supplied to the first user for sending uplink pilot signal.
18. the base station as described in any claim in claim 11,13-17, which is characterized in that
The intensity or Signal to Interference plus Noise Ratio (SINR) for its uplink signal that the resource distribution module is used to receive
Lower than the user of pre-determined threshold as the user for meeting preset condition；Or
The base station can provide CoMP service with the other base station collaborations of at least one of the communication system for collaboration user, described
Resource distribution module meets the user of preset condition described in being used to for collaboration user being used as, and does not meet using ordinary user as described
The user of the preset condition.
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| JP2013020512A JP6121180B2 (en) | 2012-02-24 | 2013-02-05 | Resource allocation method and apparatus for uplink reference signal in communication system |
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| CN104168656B (en) * | 2014-08-25 | 2018-07-24 | 大唐移动通信设备有限公司 | A kind of detection reference signal SRS resource distribution method and device |
| EP3422617A4 (en) | 2016-03-16 | 2019-03-06 | Huawei Technologies Co., Ltd. | Signal transmission method and device |
| EP3319263B1 (en) * | 2016-11-04 | 2020-10-14 | Mitsubishi Electric R&D Centre Europe B.V. | Resource allocation with different numerologies onto the same carrier |
| WO2019028925A1 (en) * | 2017-08-11 | 2019-02-14 | 华为技术有限公司 | Communication method and related device |
| CN110999455B (en) * | 2017-08-11 | 2022-04-29 | 华为技术有限公司 | Communication method and related equipment |
| EP4160975A1 (en) * | 2019-02-03 | 2023-04-05 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Method and device for measuring interference or signal received power |
| CN110808763B (en) * | 2019-09-20 | 2023-03-07 | 三维通信股份有限公司 | Cooperative pilot interference suppression method for large-scale antenna system |
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| CN101019400A (en) * | 2004-07-16 | 2007-08-15 | 高通股份有限公司 | Incremental pilot insertion for channel and interference estimation |
| CN101401338A (en) * | 2006-03-14 | 2009-04-01 | 三星电子株式会社 | Apparatus and method for performing resource allocation and communication in a wireless communication system, and system using the same |
| WO2011068995A2 (en) * | 2009-12-03 | 2011-06-09 | Qualcomm Incorporated | Sounding reference signal enhancements for wireless communication |
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| US9893859B2 (en) * | 2007-10-30 | 2018-02-13 | Texas Instruments Incorporated | Transmission of sounding reference signal and scheduling request in single carrier systems |
| US8938247B2 (en) * | 2009-04-23 | 2015-01-20 | Qualcomm Incorporated | Sounding reference signal for coordinated multi-point operation |
| JP5413964B2 (en) * | 2009-09-14 | 2014-02-12 | パナソニック株式会社 | Radio base station apparatus, radio terminal apparatus, and radio communication method |
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| CN101019400A (en) * | 2004-07-16 | 2007-08-15 | 高通股份有限公司 | Incremental pilot insertion for channel and interference estimation |
| CN101401338A (en) * | 2006-03-14 | 2009-04-01 | 三星电子株式会社 | Apparatus and method for performing resource allocation and communication in a wireless communication system, and system using the same |
| WO2011068995A2 (en) * | 2009-12-03 | 2011-06-09 | Qualcomm Incorporated | Sounding reference signal enhancements for wireless communication |
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