A kind of SRS resource collocation method and device
Technical field
The present invention relates to the communications field, more particularly to a kind of SRS resource collocation method and device.
Background technology
At present, the location technology of terminal is increasingly attracted much attention in mobile communications network, based on location-based service
Using flourishing, different social sectors, such as navigation Service, location push and association search, big data row are penetrated into
For etc., in data age, deriving the various information service come by positional information will cut a conspicuous figure, and this will further highlight positioning
The importance of technology.
Currently, in cell combining system covering application, because a cell is penetrated by a baseband processing unit and multiple
Frequency extension unit is constituted, therefore is in continuous a piece of on each MPS process, and baseband processing unit is receiving the end in this cell
Other are also have received while uplink SRS (Sounding Reference Signal, the Sounding Reference Signal) signal at end
The uplink SRS signal of cell terminal, when the terminal in different districts is allocated identical SRS resource, baseband processing unit institute
Will there is interference in the uplink SRS signal of reception, this phenomenon is referred to as the pilot pollution problem.Fig. 1 gives pilot pollution
Schematic diagram, including terminal 103 and terminal 104, baseband processing unit 101 and baseband processing unit 102, terminal 103 and terminal 104
Different cells are respectively at, terminal 103 is identical with the SRS resource that terminal 104 is allocated, and causes baseband processing unit 101 to connect
The uplink SRS signal of this cell terminal 103 is have received, meanwhile, also receive the uplink SRS signal of adjacent area terminal 104, therefore base
The uplink SRS signal of the terminal 103 that tape handling unit 101 is received just receives interference, makes baseband processing unit later use
The accuracy that the uplink SRS signal does signal transacting is greatly lowered, so as to cannot carry out determining exactly to the terminal in cell
Position.Therefore the requirement that SRS resource between neighbor cell configures mutual exclusion must is fulfilled for, the SRS signal superposition of different districts is just avoided that
Cause interference, however, current SRS resource configuration is mainly each cell separate configurations, such method is mainly considered how fully
Using the SRS resource in either own cell, therefore the purpose of the SRS mutual exclusions configuration between being unable to reach neighbor cell, therefore to small
Terminal is accurately positioned in area, how to realize by between neighbor cell SRS resource mutual exclusion configuration be urgent need to resolve problem.
The content of the invention
The embodiment of the present invention provides a kind of SRS resource collocation method and device, and SRS resource is mutual between being used to realize neighbor cell
Denounce the purpose of configuration.
The inventive method includes a kind of SRS resource collocation method, and the method includes:
It is determined that carrying out the adjacent area of co-located with first community, and determine the first SRS resource that the adjacent area is configured
Collection;
The second SRS resource in addition to the first SRS resource subset is obtained from default SRS resource set
Collection, wherein, the default SRS resource set is the configuration parameter identical SRS resource set for previously generating;
The terminal that SRS resource in the second SRS resource subset is allocated to be linked into the first community, so that
The SRS resource that terminal in the SRS resource that terminal in the first community is accessed and the adjacent area is accessed is mutually orthogonal.
Based on same inventive concept, the embodiment of the present invention further provides a kind of SRS resource configuration device, including:
Determining unit, for determining to carry out the adjacent area of co-located with first community, and determines what the adjacent area was configured
First SRS resource subset;
Acquiring unit, for obtaining in addition to the first SRS resource subset from default SRS resource set
Two SRS resource subsets, wherein, the default SRS resource set is the configuration parameter identical SRS resource collection for previously generating
Close;
Dispensing unit, for the SRS resource in the second SRS resource subset to be allocated to be linked into the first community
Interior terminal, so that the SRS resource that the terminal in the SRS resource that accesses of terminal in the first community and the adjacent area is accessed
It is mutually orthogonal.
First community determines the adjacent area with itself co-located first in the embodiment of the present invention, has further determined adjacent area
The SRS resource that uses of configuration, then selected from default SRS resource set the SRS resource being not used by be allocated to it is small
Terminal in area, so, because the SRS resource set being pre-configured with is that have the SRS resource for similarly configuring, first community
The SRS resource dependent quadrature that the terminal in SRS resource and adjacent area that interior terminal is configured is configured, so that in different districts
The uplink SRS signal of terminal to report will not occur superposition interference, therefore baseband processing unit can utilize the SRS signal for receiving
Cell terminal is accurately positioned.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be to that will make needed for embodiment description
Accompanying drawing is briefly introduced, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for this
For the those of ordinary skill in field, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is a kind of pilot pollution schematic diagram of the prior art;
Fig. 2 is a kind of schematic diagram of Comb Pilot of the prior art;
Fig. 3 is a kind of SRS resource collocation method schematic flow sheet provided in an embodiment of the present invention;
Fig. 4 is a kind of SRS resource schematic diagram provided in an embodiment of the present invention;
Fig. 5 is provided in an embodiment of the present invention a kind of to be directed to four SRS resource collocation method schematic diagrames one of cell;
Fig. 6 is provided in an embodiment of the present invention a kind of to be directed to four SRS resource collocation method schematic diagrames two of cell;
Fig. 7 is a kind of SRS resource configuration device schematic diagram provided in an embodiment of the present invention.
Specific embodiment
In order that the object, technical solutions and advantages of the present invention are clearer, below in conjunction with accompanying drawing the present invention is made into
One step ground is described in detail, it is clear that described embodiment is only some embodiments of the invention, rather than whole implementation
Example.Based on the embodiment in the present invention, what those of ordinary skill in the art were obtained under the premise of creative work is not made
All other embodiment, belongs to the scope of protection of the invention.
Various aspects are described herein in connection with terminal and/or base station.Terminal, refers to and provides a user with voice and/or data
Connective equipment (device), including wireless terminal or catv terminal.Wireless terminal can be with wireless connecting function
Portable equipment is connected to other processing equipments of radio modem, through wireless access network and one or more cores
The mobile terminal that net is communicated.For example, wireless terminal can be mobile phone (or being " honeycomb " phone) and with movement
The computer of terminal.And for example, wireless terminal can also be portable, pocket, hand-held, built-in computer or vehicle-mounted
Mobile device.For another example, wireless terminal can (English be for movement station:Mobile station), (English is access point:
Access point) or user equipment (English is:User equipment, abbreviation UE) a part.
In the prior art, in time division duplex (Time Division Dulplexing, abbreviation TDD) system, up letter
Road has symmetry characteristic with down channel.Therefore, base station can be with equivalent by the uplink channel information that uplink channel estimation is obtained
Descending channel information for needed for.In order to aid in uplink channel estimation, terminal is in up channel launch channel detection reference signal
(Sounding Reference Signal, SRS), the Sounding Reference Signal is generated using specific pseudo-random sequence,
Such as Zadoff-Chu (ZC) sequence, and terminal and the known sequence generation information in base station.Up-link sends ZC sequences
Afterwards, base station carries out coherent detection and demodulation using the signal sequence received by corresponding ZC sequence pairs, estimates up channel
CSI (Channel State Information, channel status symbol).Using resulting CSI, base station can carry out pre-
The MIMO signals such as coding, beam shaping treatment operation, with the spectrum efficiency of lifting system.Due to the quantity of orthogonal pseudo-random sequence
It is limited, therefore cannot ensure that the pseudo-random sequence that different terminals are distributed is completely orthogonal.In this regard, side of the base station using various multiplexings
Formula is terminal distribution SRS resource.SRS resource maps and distribution method is one of important design problem in practical communication system.
3G (Third Generation) Moblie partner program (3rd Generation Partnership Project, referred to as 3GPP) is formulated
The corresponding Long Term Evolution (Long of Evolved Universal Terrestrial Radio Access (E-UTRA) agreement
Term Evolution, referred to as LTE) system has corresponding SRS resource to map and distribution method.Specifically, SRS resource
Refer to pseudo-random sequence that SRS is used, specially send frequency domain, time domain, code domain resource of SRS etc..Such as, frequency domain multiplexing side
Method includes Comb Pilot, frequency hopping etc., code domain multiplexing method include to same pseudo-random sequence by different cyclic shifts (CS,
Cyclic shift) the multiple pseudo-random sequences of generation etc..
Fig. 2 gives a kind of schematic diagram of Comb Pilot, and in a time slot, odd subcarriers resource allocation is to terminal 1
SRS1 is sent, even subcarriers resource allocation sends SRS2 to terminal 2, and wherein SRS1 and SRS2 can be same pseudo-random sequence
Row.Although SRS resource can be multiplexed, LTE system is still present the situation of SRS resource shortage.Such as, in same time slot,
At most 16 filled bands of support SRS transmittings wide, correspond to 2 Comb Pilots and the difference puppet generated by 8 different CS
Random sequence.In same cell, base station is that different terminals distribute orthogonal SRS resource, and thus terminal is sent out in up-link
When penetrating SRS, the SRS from different terminals that base station receives is orthogonal, so as to base station can do correct channel estimation obtain
To the CSI of up-link.However, the terminal distribution of different districts to SRS resource be probably it is non-orthogonal, that is, occur SRS money
The situation of source conflict.Such as, on same running time-frequency resource, the pseudorandom sequence that the SRS of the different districts of LTE system distribution is used
Row adjust CS and obtain according to different ZC roots sequences.Although same ZC roots sequence is orthogonal after different CS are adjusted,
It is that the pseudo-random sequence obtained by different ZC roots sequences is but non-orthogonal.Also, distribution and the cell of different districts root sequence
Number (cell id) is relevant.Therefore, the SRS resource of different districts is non-orthogonal.
Therefore, the embodiment of the present invention for different districts when SRS resource is configured, it is regular by different districts according to setting
SRS resource is configured to mutually orthogonal resource, and this makes it possible to avoid, the uplink SRS signal of the terminal from different districts is mutual
Interference, specifically, as described in Figure 3, the embodiment of the present invention provides a kind of SRS resource collocation method schematic flow sheet, specifically real
Existing method includes:
Step S301, it is determined that carrying out the adjacent area of co-located with first community, and determines the adjacent area is configured first
SRS resource subset;
Step S302, obtains second in addition to the first SRS resource subset from default SRS resource set
SRS resource subset, wherein, the default SRS resource set is the configuration parameter identical SRS resource set for previously generating;
Step S303, the SRS resource in the second SRS resource subset is allocated to be linked into the first community
Terminal, so that the SRS resource that the terminal in the SRS resource that accesses of terminal in the first community and the adjacent area is accessed is mutual
It is orthogonal.
It should be noted that the first community mentioned in the embodiment of the present invention refers to wherein in network overlay system
Individual cell, is that one kind refers to, and adjacent area is then cell that is adjacent with first community position or may disturbing, or is passed through
Interference level etc. determines adjacent category relation.
In step S301, Neighboring Cell List is determined according to neighboring BS relationship, and the cell in the Neighboring Cell List is defined as
The adjacent area of the first community;Or, according to the configuration information that user sets, the cell that will be included in the configuration information determines
It is the adjacent area of the first community.
That is, first community receives the mark of the adjacent area of the terminal to report in first community coverage, and by institute
The corresponding adjacent area of mark is stated as the adjacent area for carrying out with the first community co-located.
Or be that user first configures to the adjacent area of first community, determining can be led to first community
The adjacent area of letter, then first community the cell in user configuration information is defined as the adjacent area of co-located.
Further, Fig. 4 gives 2 schematic diagrames of cycle SRS resource, and the SRS resource in a cycle includes resource
0th, resource 1, resource 2, resource 3, resource 4, resource 5, resource 6, resource 7, wherein, these resources are orthogonal resources.This hair
Bright embodiment combination Fig. 5 is illustrated to above-mentioned SRS resource collocation method, and specifically, Fig. 5 includes four base stations, is respectively
First base station, the second base station, the 3rd base station and the 4th base station, each base station carry a cell, the SRS moneys needed for each base station
Source is 2, four base stations eventually through adjacent area self-configuring, being configured to neighboring BS relationship each other.
Before step a, the T0 moment, four base stations in Fig. 5 do not go up electricity, and at the T0 moment, electricity completes adjacent in first base station
With postponing, due to now there was only first base station, therefore first base station does not have neighbor base station, now means 8 SRS resources pair in area
All be can use for first base station, 2 SRS resources are only needed due to first base station, therefore first base station selects two SRS at random
Resource, it is assumed that first base station picks resource 0, resource 1, after having selected, then completes the SRS moneys of the corresponding cell 0 of first base station
Source configures.
Step b, the T1 moment, if after electricity completes neighbor cell configuration on the second base station, because now first base station is existing, because
After this second base station detects first base station, adjacent area is completed each other and is mutually configured, now the SRS moneys of the second base station inquiry first base station
After the configuring condition of source, learn that resource 0, resource 1 are occupied, therefore, the second base station is any from remaining six SRS resources
Select two of which, it is assumed that the second base station picks resource 2, resource 3, after having selected, then complete the corresponding cell 1 in the second base station
SRS resource configuration.
Step c, subsequent third base station, the 4th base station still complete the SRS configurations so cell using similar step b.
From above-mentioned steps as can be seen that using SRS resource configuration strategy provided in an embodiment of the present invention, it is ensured that four
The SRS resource non-overlapping copies of cell, realize that SRS resource mutual exclusion is configured, thus for multi-cell coordination is detected in each cell eventually
The SRS signal at end provides technical support, and the measurement of cell coordination position fixing process SRS signal is in the absence of interference, it is ensured that multi-cell coordination
The possibility of positioning such that it is able to multi-plot joint positioning terminal.
Assuming that cover two cells below a base station, as described in Figure 6, first base station coverage cell 0 and cell 1,
Two base stations coverage cell 2 and cell 3, the SRS resource needed for each cell are 2, and four cells utilize first base station and second
Base station eventually through adjacent area self-configuring, being configured to neighboring BS relationship each other.
Step 1, T0 moment, after electricity completes neighbor cell configuration in first base station, due to now there was only first base station, therefore first
Base station does not have neighbor base station, now means that 8 SRS resources all can use for first base station, due to first base station covering
Two cells, it is only necessary to 4 SRS resources, therefore first base station is random selects two SRS resources and be allocated to cell 0, it is assumed that the
One base station picks resource 0, resource 1 and is allocated to cell 0, and after having selected, first base station selects two from resource is left again
SRS resource is allocated to cell 1, it is assumed that first base station picks resource 2, resource 3 and is allocated to cell 1.
Step 2, the T1 moment, if after electricity completes neighbor cell configuration on the second base station, because now first base station is existing, because
After this second base station detects first base station, adjacent area is completed each other and is mutually configured, now the SRS moneys of the second base station inquiry first base station
After the configuring condition of source, learn that resource 0, resource 1, resource 2, resource 3 are occupied, therefore, the second base station is from remaining 4
Arbitrarily two of which is selected in SRS resource, it is assumed that the second base station picks resource 4, resource 5, after having selected, then complete the second base
The SRS resource configuration of corresponding cell 2 of standing.
Step 3, follow-up second base station still completes the SRS configurations so cell 3 using the method for similar step 2, will
Resource 6, resource 7 are allocated to cell 3.
Further, it is contemplated that the diversity of network overlay system, the first SRS resource that the adjacent area is configured is determined
It is that first community receives the adjacent area that the adjacent area is transmitted directly to the first community is configured first to collect a kind of mode
The mark of SRS resource, and the first SRS resource subset that the adjacent area is configured is determined according to the mark;Or another kind side
Formula is that the first community receives the mark of the first SRS resource configured on the adjacent area forwarded by third party device,
And the first SRS resource subset that the adjacent area is configured is determined according to the mark.
Such as, the 3rd base station can be that the adjacent base station first base station of the 3rd base station of reception and the second base station are sent respectively to
The second base station in the configured SRS resource mark, or Fig. 5 of the 3rd base station can as third party device, the 3rd
The configured SRS resource that base station receives the transmission of the second base station is identified, and the first base station of the second base station forwarding is configured
SRS resource is identified.The second way can relatively reduce the number of times of the interaction between base station compared to first way, save
Signaling consumption.
Further, the first community is according to the priority of the terminal in cell, preferentially by second SRS resource
The SRS resource of concentration is allocated to the terminal of high priority, as shown in figure 5, if the terminal in T4 moment, the 4th base station is
3 because the SRS resource that can configure altogether of the 4th base station is 2, therefore, now, the 4th base station according to the priority of terminal,
For 2 terminals of high priority configure corresponding SRS resource 4 and SRS resource 5.
In addition, the SRS resource in the second SRS resource subset is allocated to be linked into the first community by first community
After interior terminal, also include:The shared information of the mark on second SRS resource is generated, it is true in order to other cells
The SRS resource that the fixed first community is configured.That is, after first base station configures SRS resource in Figure 5, will
Configured SRS resource information of the generation on first community, similarly, the second base station, the 3rd base station, and the 4th base station can
Mark of the generation on itself configured SRS resource of corresponding cell, so, base station below can obtain in time has matched somebody with somebody
The SRS resource information put, the SRS resource that then will be not used by is allocated to the terminal in cell.
Based on identical technology design, the embodiment of the present invention also provides a kind of SRS resource configuration device, and the device can perform
Above method embodiment.Device provided in an embodiment of the present invention as shown in fig. 7, comprises:Determining unit 301, acquiring unit 302,
Dispensing unit 303, wherein:
Determining unit 301, for determining to carry out the adjacent area of co-located with first community, and determines that the adjacent area is configured
The first SRS resource subset;
Acquiring unit 302, for being obtained in addition to the first SRS resource subset from default SRS resource set
The second SRS resource subset, wherein, the default SRS resource set is the configuration parameter identical SRS resource for previously generating
Set;
Dispensing unit 303, for the SRS resource in the second SRS resource subset to be allocated to be linked into described first
Terminal in cell, so that the SRS that the terminal in the SRS resource that accesses of terminal in the first community and the adjacent area is accessed
Resource is mutually orthogonal.
Further, the determining unit 301 specifically for:Neighboring Cell List is determined according to neighboring BS relationship, and by the neighbour
Cell in area's list is defined as the adjacent area of the first community;
Or, according to the configuration information that user sets, the cell included in the configuration information is defined as described first
The adjacent area of cell.
Further, receiving unit 304, the adjacent area of the first community is transmitted directly to for receiving the adjacent area
The mark of the first SRS resource for being configured;Or, configured on the adjacent area by what third party device was forwarded for receiving
The mark of the first SRS resource;
The determining unit 301 specifically for:The first SRS resource that the adjacent area is configured is determined according to the mark
Collection.
The dispensing unit 303 specifically for:According to the priority of the terminal in cell, preferentially the 2nd SRS is provided
SRS resource in the subset of source is allocated to the terminal of high priority.
Further, also include:Generation unit 305, the shared letter for generating the mark on second SRS resource
Breath, the SRS resource that the first community is configured is determined in order to other cells.
In sum, first community determines the adjacent area with itself co-located first in the embodiment of the present invention, further
Determine the configured SRS resource for using in adjacent area, the SRS resource being not used by then is selected from default SRS resource set
The terminal in this cell is allocated to, so, because the SRS resource set being pre-configured with is that have the SRS resource for similarly configuring, institute
The SRS resource dependent quadrature that terminal in the SRS resource being configured with the terminal in first community and adjacent area is configured, from without
Superposition interference will not occur with the uplink SRS signal of the terminal to report in cell, therefore baseband processing unit can be using reception
To SRS signal cell terminal is accurately positioned.
The present invention is the flow with reference to method according to embodiments of the present invention, equipment (system) and computer program product
Figure and/or block diagram are described.It should be understood that every first-class during flow chart and/or block diagram can be realized by computer program instructions
The combination of flow and/or square frame in journey and/or square frame and flow chart and/or block diagram.These computer programs can be provided
The processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce
A raw machine so that produced for reality by the instruction of computer or the computing device of other programmable data processing devices
The device of the function of being specified in present one flow of flow chart or multiple one square frame of flow and/or block diagram or multiple square frames.
These computer program instructions may be alternatively stored in can guide computer or other programmable data processing devices with spy
In determining the computer-readable memory that mode works so that instruction of the storage in the computer-readable memory is produced and include finger
Make the manufacture of device, the command device realize in one flow of flow chart or multiple one square frame of flow and/or block diagram or
The function of being specified in multiple square frames.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that in meter
Series of operation steps is performed on calculation machine or other programmable devices to produce computer implemented treatment, so as in computer or
The instruction performed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in individual square frame or multiple square frames.
, but those skilled in the art once know basic creation although preferred embodiments of the present invention have been described
Property concept, then can make other change and modification to these embodiments.So, appended claims are intended to be construed to include excellent
Select embodiment and fall into having altered and changing for the scope of the invention.
Obviously, those skilled in the art can carry out various changes and modification without deviating from essence of the invention to the present invention
God and scope.So, if these modifications of the invention and modification belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising these changes and modification.