CN103916349B - Strengthen the collocation method and device of the demodulation reference mark of public search space - Google Patents
Strengthen the collocation method and device of the demodulation reference mark of public search space Download PDFInfo
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Abstract
The invention discloses a kind of the demodulation reference mark DMRS for strengthening public search space collocation method and device,By the DMRS that different antennae port is configured for each neighbor cell,The UE in each adjacent cell is allowd to strengthen public search space by the DMRS demodulation of different antennae port respectively,The position that RE in OFDM is taken due to the DMRS of different antennae port is different,So that in the case where inter-cell signal is non-overlapping,UE in each cell can obtain effective DMRS,And even if signal between multiple neighbor cells produce it is overlapping cause to strengthen public search space overlap,Also the possibility that the DMRS between each neighbor cell overlaps can be reduced,So as to improve the possibility that the UE in cell obtains effective DMRS,And enhancing public search space is demodulated according to effective DMRS,The control information in effective enhancing public search space can be obtained.
Description
Technical field
The present invention relates to GSM, more particularly, to a kind of demodulation reference mark for strengthening public search space
Collocation method and device.
Background technology
In Long Term Evolution（Long Term Evolution, LTE）In Rel-8/9/10 systems, Physical Downlink Control Channel
（Physical Downlink Control Channel, PDCCH）It is transmitted in each downlink wireless subframe；And in thing
Manage resource block（Physical Resource Block, PRB）Number be more than 10 in the case of, PDCCH takes each descending son
Preceding 1 ~ 3 OFDM of frame（OrthogonalFrequency Division Multiplexing, OFDM）Symbol,
In the case where PRB number is more than 10, PDCCH takes preceding 2 ~ 4 OFDM symbols of each descending sub frame, and based in system
Cell specify reference symbol（Cell-specific Reference Signal）Demodulate PDCCH；Wherein, described first 1 ~ 3
OFDM symbol is referred to as " traditional PDCCH region ", also referred to as control area.Fig. 1 is the control signaling time-frequency in a PRB
Area schematic, in Fig. 1, preceding 1 ~ 3 OFDM symbol is control area, 4 ~ 11 OFDM symbol positions data area, control zone
Include several reference symbols in domain and data area, for example, the demodulation reference mark of port 0（De-Module
Reference Signal, DMRS）Be identified as R0。
At present, to meet different channels and transmission demand, system can configure 4 kinds of different control channel units
（Control Channel Element, CCE）Polymerization methodses carry out PDCCH transmission, 4 kinds of different CCE polymerization methodses
The CCE degree of polymerization is respectively 1,2,4 and 8, i.e. a PDCCH can take 1,2,4 or 8 CCE, wherein, CCE is a minimum
Control channel resource units, a CCE is generally by 36 resource units（Resources Element, RE）Composition.
Control area can be divided into public search space（Common Search Space, CSS）Sky is specifically searched for UE
Between（UE-Specific Search Space, USS）, CSS and USS may each comprise several CCE.CSS is that institute is useful in cell
Family will go to the region monitored, and USS is for some user's special configuration.Search spaces of the CSS as system default,
Various common control informations are issued in CSS, all UE can monitor CSS, i.e., obtained according to the DMRS for the port specified demodulation CSS
Common control information, communicated according to the common control information that demodulation obtains.To improve the reliability of CSS transmission, CSS can be with
Using high polymerization degree（That is CSS takes 4 or 8 CCE）.
In LTE Rel-11 and later release, for improve control channel capacity and control channel transmission can
By property, the region for being originally used for downlink data transmission is used to transmit enhancing Physical Downlink Control Channel（Enhanced-PDCCH,
E-PDCCH）, and have determined and utilize port 7 ~ 10（Port 7~10）（Or port 107 ~ 110, i.e. port 107 ~ 110）'s
DMRS demodulates E-PDCCH, wherein, the DMRS of port 7 and the DMRS of port 8 are transmitted in identical RE, the DMRS of port 9 and end
The DMRS of mouth 10 is transmitted in identical RE.Fig. 2 is the time-frequency region schematic diagram that the E-PDCCH in PRB takes, except 1 ~
Beyond 3 OFDM symbols, 4 ~ 11 OFDM of others are E-PDCCH regions, include being identified as R in E-PDCCH regions7And R9
DMRS, wherein, R7For the DMRS of port 7 mark, R8For the DMRS of port 8 mark, R9For the DMRS of port 9 mark,
R10For the DMRS of port 10 mark.
It can also be set similar to the CSS in PDCCH in E-PDCCH, referred to as strengthen public search space（enhanced
CSS, eCSS）, can also set similar to the USS in PDCCH in E-PDCCH, the specific public search space referred to as strengthened
（Enhanced USS, eUSS）, eUSS function and operation are similar with USS function and effect.Strengthening public search space will
Not by name limit, both can be used for broadcasting common control information for user（For example, the part sent at present in CSS and institute
There is information, future can also be transmitted in public search space is strengthened）, also can be under, UE performances poor in systematic function
During drop, as the search space used after rollback（The part of bearer control signalling）（I.e. from the specific public search space of enhancing
It return back to enhancing public search space）Or the public command deployment space of acquiescence（When terminal/UE is initially accessed, default priority
The region of the control signaling of reading）.UE can demodulate enhancing public search space using the DMRS of port 7 ~ 10.
If neighbor cell carries out control signal transmission all on E-PDCCH, and these correspondence positions are in different districts
Inside fail it is completely orthogonal, as shown in Figure 3, it will cause to produce between the signal between multiple cell it is overlapping, due to system default
The position for strengthening public search space RE shared in E-PDCCH is fixed, and system default adopts to neighbor cell
With same port transmission DMRS, so as to the enhancing public search space between multiple cell and DMRS can also produce it is overlapping, then it is more
Enhancing public search space and DMRS between cell will produce respectively to be interfered, and the UE in cell can not just be obtained effectively
DMRS, and according to the DMRS demodulation enhancing public search spaces being disturbed, the enhancing common search that can only obtain distortion is empty
Between information, can not obtain effectively strengthening public search space, so as to reduce enhancing public search space demodulation performance and
Reliability, reduce E-PDCCH capacity.
The content of the invention
The embodiment of the present invention provides a kind of collocation method and device of the demodulation reference mark for strengthening public search space, uses
Produce overlapping to solve the signal of prior art medium and small interval, cause the UE in cell can not obtain effective DMRS and can not
The problem of enhancing public search space is demodulated according to effective DMRS.
Technical scheme of the embodiment of the present invention is as follows：
A kind of collocation method for the demodulation reference mark for strengthening public search space, including：Configured for each neighbor cell
The DMRS of different antennae port；DMRS for each cell configuration is notified to the UE in each cell, so that the UE in each cell
Enhancing public search space is decoded according to the DMRS of configuration.
A kind of collocation method for the demodulation reference mark for strengthening public search space, including：Including macro base station and low work(
In the hierarchical network of rate base station, the DMRS of different antenna ports is configured for adjacent macro base station, is covered for same macro base station
In the range of low power base station configuration different antennae port DMRS；By for the low work(in each macro base station and macro base station coverage
Rate base station configuration DMRS notify to the UE in the low power base station in the UE in each macro base station and macro base station coverage, with
The UE in each macro base station or low power base station is set to decode enhancing public search space according to the DMRS of configuration.
A kind of configuration device for the demodulation reference mark for strengthening public search space, including：Configuration module, in network
During initial configuration or the network optimization, the DMRS of different antennae port is configured for each neighbor cell；Notification module, use
Notified in by the DMRS that configuration module is each cell configuration to the UE in each cell, so that the UE in each cell is according to configuration
DMRS decoding enhancing public search spaces.
A kind of configuration device for the demodulation reference mark DMRS for strengthening public search space, including：Configuration module, including
In macro base station and the hierarchical network of low power base station, the DMRS of different antenna ports is configured for adjacent macro base station, is same
The DMRS of low power base station configuration different antennae port in individual macro base station coverage；Notification module, will be each macro base station and
The DMRS of low power base station configuration in macro base station coverage is notified to the UE in each macro base station and macro base station coverage
UE in interior low power base station, so that the UE in UE or low power base station in each macro base station is decoded according to the DMRS of configuration and increased
Strong public search space.
Technical scheme according to embodiments of the present invention, by configuring the DMRS of different antennae port for each neighbor cell,
The UE in each adjacent cell is allowd to strengthen public search space by the DMRS demodulation of different antennae port respectively, by
The position that DMRS in different antennae port takes RE in OFDM is different so that in the case where inter-cell signal is non-overlapping, respectively
UE in individual cell can obtain effective DMRS, and even if the signal between multiple neighbor cells produces and overlapping causes enhancing public
Search space overlaps altogether, can also reduce the possibility that the DMRS between each neighbor cell overlaps, so as to
The possibility that the UE in cell obtains effective DMRS is improved, and enhancing public search space is demodulated according to effective DMRS,
The control information in effective enhancing public search space can be obtained, it is possible to increase strengthen the demodulation performance of public search space
And reliability, E-PDCCH transmission rate and utilization rate are improved, improves E-PDCCH capacity, and then can solve the problem that in the prior art
When the signal of minizone produces overlapping, the UE in cell can not obtain effective DMRS and can not be demodulated according to effective DMRS
The problem of strengthening public search space.
Other features and advantages of the present invention will be illustrated in the following description, also, partly becomes from specification
Obtain it is clear that or being understood by implementing the present invention.The purpose of the present invention and other advantages can be by the explanations write
Specifically noted structure is realized and obtained in book, claims and accompanying drawing.
Brief description of the drawings
Fig. 1 is the control signaling time-frequency region schematic diagram in a PRB in the prior art；
The time-frequency region schematic diagram that Fig. 2 takes for the EPDCCH in a PRB in the prior art；
Fig. 3 produces overlapping schematic diagram for the enhancing public search space in a PRB in the prior art and DMRS；
Fig. 4 is the workflow diagram of the DMRS of enhancing public search space provided in an embodiment of the present invention collocation method；
Fig. 5 is the scene signal of the DMRS of application enhancing public search space provided in an embodiment of the present invention collocation method
Figure；
RE shared by the DMRS for strengthening public search space in a PRB that Fig. 6 methods shown in application drawing 4 configure
Position view；
Fig. 7 is the work of the concrete application of the DMRS of enhancing public search space provided in an embodiment of the present invention collocation method
Make flow chart；
Fig. 8 is the structured flowchart of the DMRS of enhancing public search space provided in an embodiment of the present invention configuration device；
Fig. 9 is the scene signal of the DMRS of application enhancing public search space provided in an embodiment of the present invention collocation method
Figure；
Figure 10 is another workflow of the DMRS of enhancing public search space provided in an embodiment of the present invention collocation method
Cheng Tu；
Figure 11 is another structural frames of the DMRS of enhancing public search space provided in an embodiment of the present invention configuration device
Figure.
Embodiment
Embodiments of the invention are illustrated below in conjunction with accompanying drawing, it will be appreciated that embodiment described herein is only used
In the description and interpretation present invention, it is not intended to limit the present invention.
Signal generation for prior art medium and small interval is overlapping, causes the UE in cell to be demodulated according to the DMRS being disturbed
Strengthen public search space, the control information in effective enhancing public search space can not be obtained, reduce enhancing common search
The demodulation performance and reliability in space, the problem of reducing E-PDCCH capacity, the embodiments of the invention provide one kind enhancing public to search
The DMRS in rope space allocation plan, to solve the problem.Technical scheme according to embodiments of the present invention, by for each phase
The DMRS of adjacent cell configuration different antennae port so that the UE in each adjacent cell can pass through different antennae port respectively
DMRS demodulation enhancing public search spaces, the position that RE in OFDM is taken due to the DMRS of different antennae port is different so that
In the case where inter-cell signal is non-overlapping, the UE in each cell can obtain effective DMRS, and even if multiple adjacent
The signal of minizone produce it is overlapping cause to strengthen public search space overlap, can also reduce between each neighbor cell
The possibility that DMRS overlaps, so as to improve the possibility that the UE in cell obtains effective DMRS, and according to having
The DMRS demodulation enhancing public search spaces of effect, can obtain the control information in effective enhancing public search space, can
The demodulation performance and reliability of enhancing public search space are improved, improves E-PDCCH capacity.
The technical scheme of the embodiment of the present invention is described in detail below.
Embodiment one
Fig. 4 shows the workflow of the DMRS of enhancing public search space provided in an embodiment of the present invention collocation method
Figure, as shown in figure 4, this method includes：
Step 401, during network initial configuration or the network optimization, for each neighbor cell configure different antennae
The DMRS of port.
Specifically, specific configuration operation can be carried out by the following two kinds mode：
Configuration mode one, for current cell to be allocated, predefined parameter is removed with the Numerical-Mode of the cell ID of the cell
Mould division result is obtained, according to the DMRS of predetermined index numerical value and antenna port corresponding relation, by the numerical value with mould division result
The DMRS of antenna port is allocated to the cell corresponding to identical index numerical value；
It is for example, corresponding with the DMRS of antenna port with the numerical value of the cell ID of cell divided by 4, predetermined mould division result
Relation is：The DMRS of corresponding ports 7 is R when mould division result is 07, the DMRS of corresponding ports 8 is R when mould division result is 18, mould removes
The DMRS of corresponding ports 9 is R when being as a result 29, the DMRS of corresponding ports 10 is R when mould division result is 310；
Configuration mode two, the position relationship according to each neighbor cell, put in order according to predetermined to each adjacent small
Area is ranked up；Corresponding current cell to be allocated, according to the clooating sequence after the ranking cells and predetermined clooating sequence
With the DMRS of antenna port corresponding relation, DMRS corresponding with the clooating sequence after the ranking cells is allocated to each adjacent
Cell；
For example, in neighbor cell N ~ N+6 as shown in Figure 5, predetermined puts in order as N, N+1, N+2, N+3, N+4, N
+ 5, the DMRS of N+6, predetermined clooating sequence and antenna port corresponding relation is as shown in table 1, then, according to pair as shown in table 1
It should be related to, the DMRS that port 7 is configured for cell N is R7, the DMRS that port 8 is configured for cell N+1 is R8, end is configured for cell N+2
The DMRS of mouth 9 is R9, it is that the DMRS of the antenna port of other cell configurations is as shown in table 1, does not repeat one by one here.
Table 1
| Cell | The DMRS of antenna port |
| 1、N | Port7 R7 |
| 2、N+1 | Port8 R8 |
| 3、N+2 | Port9 R9 |
| 4、N+3 | Port10 R10 |
| 5、N+4 | Port8 R8 |
| 6、N+5 | Port9 R9 |
| 7、N+6 | Port10 R10 |
Can be the DMRS that neighbor cell configures different antennae port by above-mentioned configuration mode.It is understood that this
Inventive embodiments can also configure the DMRS of different antennae port for each neighbor cell in other way.
Step 402, the DMRS for each cell configuration notified to the UE in each cell so that the UE in each cell according to
The DMRS decoding enhancing public search spaces of configuration.
Preferably, the method that the present embodiment provides, can be realized, can also be in network side and UE sides reality simultaneously in network side
It is existing.First way, in the case where network side is realized, notified after determining the DMRS of each neighbor cell by network side to each
UE in cell.Second, in the case where network side and UE sides are realized simultaneously, network side and UE are each according to shared agreement respectively
From DMRS is determined, determine that DMRS mode is identical with above-mentioned first way in network side, but network side is not notified to UE,
In UE, the DMRS of the UE is determined by the One function unit in UE, and notified the DMRS of determination to UE by the functional unit
The middle functional unit for realizing demodulation enhancing public search space.
By above-mentioned processing procedure, during network initial configuration or the network optimization, configured for each neighbor cell
The DMRS of different antennae port so that the UE in each adjacent cell can be demodulated by the DMRS of different antennae port respectively
Strengthen public search space, the position that RE in OFDM is taken due to the DMRS of different antennae port is different so that believes in minizone
In the case of number non-overlapping, the UE in each cell can obtain effective DMRS, and even if letter between multiple neighbor cells
Number produce it is overlapping cause to strengthen public search space overlap, can also reduce DMRS between each neighbor cell and weight occurs
Folded possibility, so as to improve the possibility that the UE in cell obtains effective DMRS, and according to effective DMRS solutions
Enhancing public search space is adjusted, the control information in effective enhancing public search space can be obtained, it is possible to increase enhancing is public
The demodulation performance and reliability of search space altogether, E-PDCCH capacity is improved, and then can solve the problem that the letter of prior art medium and small interval
When number producing overlapping, the UE in cell can not obtain effective DMRS and can not demodulate that enhancing is public to search according to effective DMRS
The problem of rope space.
The DMRS of enhancing public search space provided in an embodiment of the present invention collocation method, can be specifically included for such as
Under two kinds of application scenarios processing method.
Scene one
Include 7 adjacent cells, i.e. cell N ~ cell N+6 in this scenario, each cell includes macro base station
（Macro-Base Station, MBS）, the schematic diagram of the scene can be as shown in Figure 5.
In this scenario, the DMRS of public search space processing procedure, Ke Yiru are strengthened for the configuration of each neighbor cell
Handling process shown in Fig. 4, is repeated no more here.
Fig. 6 is shown to the DMRS of above-mentioned cell N ~ cell N+3 enhancing public search spaces for configuring to obtain in a PRB
In shared RE position view, specific configuring condition is as shown in table 1, i.e. the DMRS that port 7 is configured for cell N is R7, it is
The DMRS of cell N+1 configurations port 8 is R8, the DMRS that port 9 is configured for cell N+2 is R9, port 10 is configured for cell N+3
DMRS is R10, cell N+4 ~ cell N+6 situation is identical with cell N+1 ~ cell N+3 situation, and port 8 is configured for cell N+4
DMRS be R8, the DMRS that port 9 is configured for cell N+5 is R9, the DMRS that port 10 is configured for cell N+6 is R10。
The technique effect that processing procedure in the scene can reach is also identical with the treatment effect of method shown in Fig. 4, here
Repeat no more.
Scene two
In this scenario, it is necessary to set the enhancing in the transmission mode residing after rollback is handled of each neighbor cell public
The DMRS of search space altogether.
Rollback processing generally includes two kinds of situations, and a kind of situation is the rollback of transmission mode, i.e., base station is with higher transmission
It is required that transmission means（That is the first transmission means）During being communicated, due to transmission conditions variation, higher biography is not reached
In the case of defeated requirement, sub-optimal transmission pattern can be return back to（That is the second transmission means）Transmission side i.e. relatively low to channel requirements
Formula, communicated in a manner of sub-optimal transmission, such as " a variety of transmission modes are defined in 3GPP TS36.213 ", i.e., in standard
Mode1 ~ mode7, two kinds of transmission means are defined in transmission mode mode4, i.e. the first transmission means is Closed-loop
spatialmultiplexing(see subclause7.1.4)or Transmit diversity(see
Subclause7.1.2), the second transmission means is Transmit diversity (see subclause7.1.2)；
Second of situation is the rollback of search space, i.e., base station return back to the situation of enhancing public search space from eUSS.
As shown in fig. 7, include following processing step for the processing procedure of the scene：
Step 701, during network initial configuration or the network optimization, configure each neighbor cell and perform rollback processing
When configuring the DMRS of the enhancing public search space in the transmission mode residing for UE, different antennae end is configured for each neighbor cell
The DMRS of mouth；
Wherein, specific configuration operation is as described in configuration mode one and configuration mode two in above-mentioned step 401, here not
Repeat again；
Step 702, the DMRS for each cell configuration notified to the UE in each cell so that the UE in each cell according to
The DMRS decoding enhancing public search spaces of configuration.
Can be that enhancing common search of each adjacent base station configuration after rollback is handled is empty by above-mentioned processing procedure
Between DMRS, can ensure each adjacent base station be in retract after transmission mode in when, UE can obtain effective DMRS, from
And enhancing public search space is demodulated according to effective DMRS, the control letter in effective enhancing public search space can be obtained
Breath, it is possible to increase strengthen the demodulation performance and reliability of public search space, improve E-PDCCH capacity.
Based on identical inventive concept, the embodiment of the present invention additionally provides a kind of matching somebody with somebody for DMRS for strengthening public search space
Put device.
Fig. 8 shows the structural frames of the DMRS of enhancing public search space provided in an embodiment of the present invention configuration device
Figure, as shown in figure 8, the device includes：
Configuration module 11, for during network initial configuration or the network optimization, being configured for each neighbor cell
The DMRS of different antennae port；
Specifically, configuration module 11 is for current cell to be allocated, with the Numerical-Mode of the cell ID of the cell except pre-
Determine parameter and obtain mould division result, will be with mould division result according to the DMRS of predetermined index numerical value and antenna port corresponding relation
Numerical value identical index numerical value corresponding to the DMRS of antenna port be allocated to the cell；
Or configuration module 11 puts in order to each phase according to the position relationship of each neighbor cell according to predetermined
Adjacent cell is ranked up；For current cell to be allocated, according to the clooating sequence after the ranking cells and predetermined sequence
Order and the DMRS of antenna port corresponding relation, it is small to be allocated to this by DMRS corresponding with the clooating sequence after the ranking cells
Area.
Preferably, configuration module 11 performs the increasing in the transmission mode to retract residing for processing configuration UE in each neighbor cell
During the DMRS of strong public search space, the DMRS of different antennae port is configured for each neighbor cell；Wherein, retract processing bag
Include：Cell configuration UE return back to the second transmission means from the first transmission means, wherein, requirement of first transmission means to channel is high
In requirement of second transmission means to channel.
Notification module 12, be connected to configuration module 11, for by configuration module 11 for each cell configuration DMRS notify to
UE in each cell, so that the UE in each cell decodes enhancing public search space according to the DMRS of configuration.
Preferably, when only realizing device provided in an embodiment of the present invention in network side, the device is as shown in Figure 8；When
When device provided in an embodiment of the present invention is realized in network side and UE sides simultaneously, only include configuration module 11 in the device of network side,
Device in UE sides includes module as shown in Figure 8.
Also can be the DMRS that each neighbor cell configures different antennae port so that each by the device shown in Fig. 8
UE in adjacent cell can be respectively by the DMRS demodulation enhancing public search spaces of different antennae port, due to not on the same day
The position that the DMRS of line end mouth takes RE in OFDM is different so that in the case where inter-cell signal is non-overlapping, in each cell
UE can obtain effective DMRS, and even if the signal between multiple neighbor cells produce it is overlapping cause to strengthen common search it is empty
Between overlap, the possibility that the DMRS between each neighbor cell overlaps can be also reduced, so as to improve cell
In UE obtain effective DMRS possibility, and enhancing public search space is demodulated according to effective DMRS, can obtained
Control information in effective enhancing public search space, it is possible to increase strengthen the demodulation performance of public search space and reliable
Property, E-PDCCH transmission rate and utilization rate are improved, improves E-PDCCH capacity, and then can solve the problem that prior art medium and small interval
Signal when producing overlapping, the UE in cell can not obtain effective DMRS and can not to demodulate enhancing according to effective DMRS public
Altogether the problem of search space.
Embodiment two
Include 7 adjacent cells in this scenario, i.e. cell N ~ cell N+6, each cell includes macro base station and low
Power base station（pico）, the schematic diagram of the scene can be as shown in Figure 9.
In this scenario, as shown in Figure 10, the DMRS of public search space processing is strengthened for the configuration of each neighbor cell
Process comprises the following steps：
Step 1001, during network initial configuration or the network optimization, including macro base station and low power base station
In hierarchical network, the DMRS of different antenna ports is configured for adjacent macro base station, is in same macro base station coverage
The DMRS of low power base station configuration different antennae port；
Preferably, the DMRS of not RE different antenna ports is taken in OFDM symbol for adjacent macro base station configuration,
Identical RE is taken in OFDM symbol not with the macro base station for the low power base station configuration in same macro base station coverage
With the DMRS of antenna port；
Specifically, different RE antenna port is occupied in OFDM symbol for the macro base station configuration in neighbor cell
DMRS, as described in configuration mode one and configuration mode two in above-mentioned step 401, repeat no more here, to the grand base in cell
Stand configuration antenna port DMRS it is as shown in table 1.
Take identical RE's in OFDM symbol to belong to the configuration of the low power base station in same macro base station coverage
The DMRS of different antennae port, for example, the DMRS for the antenna port 7 of the macro base station configuration in cell N is R7, antenna port 7
Identical RE in OFDM symbol is taken with antenna port 8, then is R by the DMRS of antenna port 88The low work(being allocated in cell N
Rate base station.It also list in table 2 as the macro base station in other cells and the DMRS of the antenna port of the configuration of low power base station
Situation, the DMRS that antenna port 8 is configured for the macro base station in cell N+1 is R8, antenna port 7 is configured for low power base station
DMRS is R7；The DMRS that antenna port 9 is configured for cell N+2 is R9, it is that the DMRS that low power base station configures antenna port 10 is
R10；The DMRS that port 10 is configured for cell N+3 is R10, the DMRS that antenna port 9 is configured for low power base station is R9；For cell N+
The DMRS of 4 configuration ports 8 is R8, the DMRS that antenna port 7 is configured for low power base station is R7；Port 9 is configured for cell N+5
DMRS is R9, the DMRS that antenna port 10 is configured for low power base station is R10；The DMRS that port 10 is configured for cell N+6 is R10,
The DMRS that antenna port 9 is configured for low power base station is R9。
Table 2
Preferably, it is similar to the scene two that above-described embodiment is a kind of, perform rollback processing configuring each adjacent macro base station
When configuring the DMRS of the enhancing public search space in the transmission mode residing for UE, configured for each adjacent macro base station in OFDM
The DMRS of different RE different antenna ports is taken in symbol, wherein, the rollback processing includes：Macro base station configures UE from the
One transmission means return back to the second transmission means, wherein, requirement of first transmission means to channel is higher than the second transmission means pair
The requirement of channel；Or macro base station configures UE base stations and return back to enhancing common search sky from the specific search space eUSS of enhancing
Between；
Step 1002, by each macro base station and macro base station coverage low power base station configure DMRS notify to each
The UE in the low power base station in UE and macro base station coverage in individual macro base station, so that UE or low-power in each macro base station
UE in base station decodes enhancing public search space according to the DMRS of configuration.
Preferably, as described in embodiment one, the method shown in Figure 10 can also be realized in network side, or exist at the same time
Network side and UE sides are realized.
In above-mentioned processing procedure, the DMRS of different antenna ports is configured to adjacent macro base station, is preferably configured in
The DMRS of different RE different antenna ports is taken in OFDM symbol, can strengthen DMRS's between each adjacent macro base station
Antijamming capability；The DMRS of different antennae port is configured for the low power base station in same macro base station coverage, is preferably matched somebody with somebody
The DMRS for the different antennae port for taking identical RE in OFDM symbol with the macro base station is put, the UE in macro base station is according to DMRS
In the operating process of demodulation enhancing public search space, including the processing that some information of itself is multiplied by base station with DMRS walks
Suddenly, in this step, for example, by some information of itself with transmission DMRS RE（Such as transmission R7 and R8 RE）In information
After multiplication, due to there is orthogonality between the DMRS for the different antennae port for taking identical RE, with regard to can eliminate be allocated to it is same
The DMRS of low power base station in macro base station coverage, so as to obtain effective DMRS, and then can be according to effective
DMRS demodulates to obtain the control information in effective enhancing public search space, it is possible to increase strengthens the demodulation of public search space
Performance And Reliability, E-PDCCH transmission rate and utilization rate are improved, improve E-PDCCH capacity, and then can solve the problem that existing skill
When the signal of art medium and small interval produces overlapping, the UE in cell can not obtain effective DMRS and can not be according to effective DMRS
The problem of demodulation enhancing public search space.
Based on identical inventive concept, the embodiment of the present invention additionally provides a kind of demodulation reference for strengthening public search space
Symbol DMRS configuration device, as shown in figure 11, the device include：
Configuration module 21, in the hierarchical network including macro base station and low power base station, for adjacent macro base station configuration not
The DMRS of same antenna port, it is that the low power base station in same macro base station coverage configures different antennae port
DMRS；Preferably, the DMRS of not RE different antenna ports is taken in OFDM symbol for adjacent macro base station configuration, is same
Low power base station configuration in one macro base station coverage and the macro base station taken in OFDM symbol identical RE not on the same day
The DMRS of line end mouth；
Specifically, configuration module 21 is for current macro base station to be allocated, with the Numerical-Mode of the mark of the macro base station except pre-
Determine parameter and obtain mould division result, will be with mould division result according to the DMRS of predetermined index numerical value and antenna port corresponding relation
Numerical value identical index numerical value corresponding to the DMRS of antenna port be allocated to the macro base station；Or according to each adjacent grand base
The position relationship stood, each adjacent macro base station is ranked up according to predetermined putting in order；For current grand base to be allocated
Stand, the corresponding relation of clooating sequence and the DMRS of predetermined clooating sequence and antenna port after being sorted according to the macro base station,
DMRS corresponding with the clooating sequence after macro base station sequence is allocated to the macro base station；
Preferably, configuration module 21 configures the increasing in each adjacent macro base station transmission mode residing after rollback is handled
During the DMRS of strong public search space, different RE different days are taken in OFDM symbol for each adjacent macro base station configuration
The DMRS of line end mouth, wherein, the rollback processing includes：Macro base station configuration UE return back to the second transmission side from the first transmission means
Formula, wherein, requirement of first transmission means to channel is higher than requirement of second transmission means to channel；Or macro base station is from spy
Fixed search space USS return back to public search space, or return back to enhancing public search space from specific search space.
Notification module 22, configuration module 21 is connected to, is in each macro base station and macro base station coverage by configuration module 21
Low power base station configuration DMRS notify in the low power base station in the UE in each macro base station and macro base station coverage
UE so that the UE in UE or low power base station in each macro base station decodes enhancing public search space according to the DMRS of configuration.
Preferably, when only realizing device provided in an embodiment of the present invention in network side, the device is as shown in figure 11；When
When device provided in an embodiment of the present invention is realized in network side and UE sides simultaneously, only include configuration module 21 in the device of network side,
Device in UE sides includes module as shown in figure 11.
By the device described in Figure 11, UE can be also set to obtain effective DMRS, and then can be solved according to effective DMRS
Adjust and obtain the control information in effective enhancing public search space, it is possible to increase strengthen public search space demodulation performance and
Reliability, E-PDCCH transmission rate and utilization rate are improved, improve E-PDCCH capacity, and then can solve the problem that small in prior art
When the signal in section produces overlapping, the UE in cell, which can not obtain effective DMRS and can not be demodulated according to effective DMRS, to be increased
The problem of strong public search space.
One of ordinary skill in the art will appreciate that all or part of step for realizing above-described embodiment method carrying is can
To instruct the hardware of correlation to complete by program, described program can be stored in a kind of computer-readable recording medium,
The program upon execution, including one or a combination set of the step of embodiment of the method.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing module, can also
That unit is individually physically present, can also two or more units be integrated in a module.Above-mentioned integrated mould
Block can both be realized in the form of hardware, can also be realized in the form of software function module.The integrated module is such as
Fruit is realized in the form of software function module and as independent production marketing or in use, can also be stored in a computer
In read/write memory medium.
It should be understood by those skilled in the art that, embodiments of the invention can be provided as method, system or computer program
Product.Therefore, the present invention can use the reality in terms of complete hardware embodiment, complete software embodiment or combination software and hardware
Apply the form of example.Moreover, the present invention can use the computer for wherein including computer usable program code in one or more
Usable storage medium（Including but not limited to magnetic disk storage and optical memory etc.）The shape of the computer program product of upper implementation
Formula.
The present invention is with reference to method according to embodiments of the present invention, equipment（System）And the flow of computer program product
Figure and/or block diagram describe.It should be understood that can be by every first-class in computer program instructions implementation process figure and/or block diagram
Journey and/or the flow in square frame and flow chart and/or block diagram and/or the combination of square frame.These computer programs can be provided
The processors 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 by the instruction of computer or the computing device of other programmable data processing devices for real
The device for the function of being specified in present one flow of flow chart or one square frame of multiple flows and/or block diagram or multiple square frames.
These computer program instructions, which may be alternatively stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that the instruction being stored in the computer-readable memory, which produces, to be included referring to
Make the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one square frame of 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 counted
Series of operation steps is performed on calculation machine or other programmable devices to produce computer implemented processing, 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.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention 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 including these changes and modification.
Claims (12)
- A kind of 1. collocation method for the demodulation reference mark DMRS for strengthening public search space, it is characterised in that including：The DMRS of different antennae port is configured for each neighbor cell, including：For current cell to be allocated, with the cell The Numerical-Mode of cell ID obtains mould division result except predefined parameter, according to the DMRS of predetermined index numerical value and antenna port pair It should be related to, the DMRS of antenna port corresponding with the numerical value identical of mould division result index numerical value is allocated to the cell；Or According to the position relationship of each neighbor cell, each neighbor cell is ranked up according to predetermined putting in order；For current Cell to be allocated, according to the clooating sequence after the ranking cells and the DMRS of predetermined clooating sequence and antenna port pair It should be related to, DMRS corresponding with the clooating sequence after the ranking cells is allocated to the cell；DMRS for each cell configuration is notified to the UE in each cell, so that the UE in each cell solves according to the DMRS of configuration Code enhancing public search space.
- 2. according to the method for claim 1, it is characterised in that configure different antennae port for each neighbor cell DMRS, in addition to：The DMRS of the enhancing public search space in the transmission mode to retract residing for processing configuration UE is performed in each neighbor cell When, it is the DMRS that each neighbor cell configures different antennae port, wherein, the rollback processing includes：Cell configuration UE is from One transmission means return back to the second transmission means, wherein, requirement of first transmission means to channel is higher than the second transmission means pair The requirement of channel；Or cell configuration UE base stations return back to enhancing public search space from the specific search space eUSS of enhancing.
- A kind of 3. collocation method for the demodulation reference mark DMRS for strengthening public search space, it is characterised in that including：In the hierarchical network including macro base station and low power base station, different antenna ports is configured for adjacent macro base station DMRS, it is the DMRS of the low power base station configuration different antennae port in same macro base station coverage；Described is adjacent Macro base station configures the DMRS of different antenna ports, including：For current macro base station to be allocated, with the mark of the macro base station Numerical-Mode obtains mould division result except predefined parameter, will according to the DMRS of predetermined index numerical value and antenna port corresponding relation The DMRS of antenna port corresponding with the numerical value identical index numerical value of mould division result is allocated to the macro base station；Or according to each The position relationship of individual adjacent macro base station, each adjacent macro base station is ranked up according to predetermined putting in order；For currently treating The macro base station of distribution, clooating sequence and the DMRS of predetermined clooating sequence and antenna port after being sorted according to the macro base station Corresponding relation, DMRS corresponding with the clooating sequence after macro base station sequence is allocated to the macro base station；The DMRS configured for the low power base station in each macro base station and macro base station coverage is notified in each macro base station The UE in low power base station in UE and macro base station coverage, so that the UE roots in UE or low power base station in each macro base station According to the DMRS decoding enhancing public search spaces of configuration.
- 4. according to the method for claim 3, it is characterised in that different antenna ports is configured for adjacent macro base station DMRS, specifically include：The different antennas that different resource unit R E is taken in orthogonal frequency division multiplex OFDM symbol are configured for adjacent macro base station The DMRS of port.
- 5. according to the method for claim 3, it is characterised in that for the low power base station in same macro base station coverage The DMRS of different antennae port is configured, is specifically included：For the low power base station configuration in same macro base station coverage with the macro base station in orthogonal frequency division multiplex OFDM symbol The DMRS of the middle different antennae port for taking same resource units RE.
- 6. the method according to any one of claim 3~5, it is characterised in that different for adjacent macro base station configuration The DMRS of antenna port, in addition to：Enhancing public search space in each adjacent macro base station performs the transmission mode to retract residing for processing configuration UE During DMRS, the DMRS of different RE different antenna ports is taken in OFDM symbol for each adjacent macro base station configuration, its In, the rollback processing includes：Macro base station configuration UE return back to the second transmission means from the first transmission means, wherein, first passes Requirement of the defeated mode to channel is higher than requirement of second transmission means to channel；Or macro base station configures UE base stations from enhancing Specific search space eUSS return back to enhancing public search space.
- A kind of 7. configuration device for the demodulation reference mark DMRS for strengthening public search space, it is characterised in that including：Configuration module, for configuring the DMRS of different antennae port for each neighbor cell；The configuration module, specifically for for current cell to be allocated, being removed with the Numerical-Mode of the cell ID of the cell pre- Determine parameter and obtain mould division result, will be with mould division result according to the DMRS of predetermined index numerical value and antenna port corresponding relation Numerical value identical index numerical value corresponding to the DMRS of antenna port be allocated to the cell；Or according to each neighbor cell Position relationship, each neighbor cell is ranked up according to predetermined putting in order；For current cell to be allocated, according to this The corresponding relation of clooating sequence and the DMRS of predetermined clooating sequence and antenna port after ranking cells, it will be arranged with the cell DMRS corresponding to clooating sequence after sequence is allocated to the cell；Notification module, for configuration module to be notified to the UE in each cell for the DMRS of each cell configuration, so that each cell In UE according to the DMRS of configuration decode enhancing public search space.
- 8. device according to claim 7, it is characterised in that the configuration module, be additionally operable to：The DMRS of the enhancing public search space in the transmission mode to retract residing for processing configuration UE is performed in each neighbor cell When, it is the DMRS that each neighbor cell configures different antennae port, wherein, the rollback processing includes：Cell configuration UE is from One transmission means return back to the second transmission means, wherein, requirement of first transmission means to channel is higher than the second transmission means pair The requirement of channel；Or cell configuration UE base stations return back to enhancing public search space from the specific search space eUSS of enhancing.
- A kind of 9. configuration device for the demodulation reference mark DMRS for strengthening public search space, it is characterised in that including：Configuration module, in the hierarchical network including macro base station and low power base station, different days is configured for adjacent macro base station The DMRS of line end mouth, it is the DMRS of the low power base station configuration different antennae port in same macro base station coverage；The configuration module, specifically for for current macro base station to be allocated, being removed with the Numerical-Mode of the mark of the macro base station pre- Determine parameter and obtain mould division result, will be with mould division result according to the DMRS of predetermined index numerical value and antenna port corresponding relation Numerical value identical index numerical value corresponding to the DMRS of antenna port be allocated to the macro base station；Or according to each adjacent grand base The position relationship stood, each adjacent macro base station is ranked up according to predetermined putting in order；For current grand base to be allocated Stand, the corresponding relation of clooating sequence and the DMRS of predetermined clooating sequence and antenna port after being sorted according to the macro base station, DMRS corresponding with the clooating sequence after macro base station sequence is allocated to the macro base station；Notification module, it is the DMRS that the low power base station in each macro base station and macro base station coverage configures by the configuration module Notify to the UE in the low power base station in the UE in each macro base station and macro base station coverage, so that the UE in each macro base station Or the UE in low power base station decodes enhancing public search space according to the DMRS of configuration.
- 10. device according to claim 9, it is characterised in that the configuration module, be specifically used for：For adjacent grand base Configuration of standing takes the DMRS of different resource unit R E different antenna ports in orthogonal frequency division multiplex OFDM symbol.
- 11. device according to claim 9, it is characterised in that the configuration module, be specifically used for：For the low power base station configuration in same macro base station coverage with the macro base station in orthogonal frequency division multiplex OFDM symbol The DMRS of the middle different antennae port for taking same resource units RE.
- 12. the device according to any one of claim 9~11, it is characterised in that the configuration module, be additionally operable to：Enhancing public search space in each adjacent macro base station performs the transmission mode to retract residing for processing configuration UE During DMRS, the DMRS of different RE different antenna ports is taken in OFDM symbol for each adjacent macro base station configuration, its In, the rollback processing includes：Macro base station configuration UE return back to the second transmission means from the first transmission means, wherein, first passes Requirement of the defeated mode to channel is higher than requirement of second transmission means to channel；Or macro base station configures UE base stations from enhancing Specific search space eUSS return back to enhancing public search space.
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| CN102082595B (en) * | 2010-04-30 | 2013-08-07 | 电信科学技术研究院 | Method, device and system for configuring DMRS (Demodulation Reference Signal) |
| CN102142918B (en) * | 2011-03-29 | 2015-04-08 | 电信科学技术研究院 | Method and equipment for processing pilot sequence |
| CN102315870B (en) * | 2011-09-30 | 2017-10-03 | 中兴通讯股份有限公司 | A kind of Downlink Control Information indicating means and device |
| CN102438314B (en) * | 2011-10-17 | 2014-04-16 | 电信科学技术研究院 | Method for transmitting control information, system and equipment thereof |
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