CN101098184A - Method and apparatus for eliminating interference between adjacent cells - Google Patents
Method and apparatus for eliminating interference between adjacent cells Download PDFInfo
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- CN101098184A CN101098184A CNA2006100894283A CN200610089428A CN101098184A CN 101098184 A CN101098184 A CN 101098184A CN A2006100894283 A CNA2006100894283 A CN A2006100894283A CN 200610089428 A CN200610089428 A CN 200610089428A CN 101098184 A CN101098184 A CN 101098184A
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Abstract
The invention discloses a method for eliminating the interference of nearby regions, wherein user device UE obtains the midamble setting information of each nearby region, while the information comprises midamble shift distributing method and midamble setting parameter K, the UE according to the midabmle setting parameter K for each nearby region which midabmle shift distributing method is default obtains the relation between the midabmle shift and channel code of nearby regions, and the UE according to the relation checks relative nearby regions to obtain signal evaluation, via which to eliminate the interference of nearby regions. The invention also discloses a communicator and a TDD-CDMA communication system.
Description
Technical field
The present invention relates to communication technical field, particularly in the time-division duplex connecting system, eliminate the method and the device of neighbor cell interference.
Background technology
Insert (TDD-CDMA at time-division duplex, Time Division Duplex CodeDivision Multiple Access) in the system, that air interface adopts is TDMA (Time DivisionMultiple Access, time division multiple access inserts)/multiple access method of CDMA, use time slot, spreading code that Radio Resource is distinguished usually.
In the TD-SCDMA system, its system configuration frame as shown in Figure 1, each subframe is made up of 10 time slots (TS), wherein 7 time slots can be used for transfer of data, all the other 3 time slots are used for regularly synchronously.In a time slot, can send a plurality of bursts simultaneously, burst structure is as shown in Figure 2.Burst structure comprises data, midamble Midamble and protection three parts of GP at interval.Wherein, data division need use different spreading codes to distinguish, and spread spectrum coefficient can be 1,2,4,8,16.The Midamble design is carried out channel estimating for the ease of receiver, and the midamble that different user uses in the same time slot (hereinafter referred to as midamble skew midamble shift) is produced by the method for cyclic shift by a basic midamble.The relation of Midamble distribution and outburst type Burst Type is as follows:
| Cell/group name Information Element/Group name | Necessary Need | Multiple Multi | Type and interface Type and Reference | Semantic description Semantics description | Version Version |
| CHOICE TDD option | MP | REL4 | |||
| ＞3.84 Mcps TDD | REL-4 | ||||
| ...... | |||||
| ＞1.28 Mcps TDD | REL-4 | ||||
| ＞＞Midamble Allocation Mode | MP | Enumerated(Default midamble，Common midamble，UE specific midamble) | REL-4 | ||
| ＞＞Midamble | MP | Integer(2，4，6，8，10， | As defined in | REL-4 |
| Cell/group name Information Element/Group name | Necessary Need | Multiple Multi | Type and interface Type and Reference | Semantic description Semantics deseription | |
| configuration | |||||
| 12，14，16) | 3GPP TS 25.221 | ||||
| ＞＞Midamble Shift | CV-UE | Integer(0..15) | REL-4 |
Can adopt multiple mode to eliminate in the prior art or suppress interference from Serving cell, wherein the best mode of resultant effect is a Multiuser Detection, i.e. associated detection technique.Joint-detection is partly carried out channel estimating according to midamble, utilizes the related information of channel estimating and spread spectrum code word, thereby eliminates multi-user interference.Use associated detection technique just must know the midamble configuration information of sub-district, and cell parameter Cellparameter and basic midamble (basic midamble) have fixing corresponding relation, therefore, UE can determine the basic midamble (basic midamble) of Serving cell according to the Cell parameterID of Serving cell.Cell parameterID is defined as follows in agreement TS 25.33110.3.6.9:
| Information Element/Group name | Need | Multi | Type and reference | Semantics description |
| Cell parameter Id | MP | Integer(0..127) |
The corresponding physical layer parameter is:
| Block code (Code Group) | Related sign indicating number (Associated Codes) | |||
| Descending synchronous code numbering SYNC DL ID | Uplink synchronous code numbering SYNC UL ID | Scrambler numbering Scrambling Code ID | Basic midamble numbering Basic Midamble | |
| Group | ||||
| 1 | 0 | 0～7 (000～111) | 0 | 0 |
| 1 | 1 | |||
| 2 | 2 | |||
| 3 | 3 | |||
| |
1 | 8～15 (000～111) | 4 | 4 |
| 5 | 5 | |||
| 6 | 6 | |||
| 7 | 7 | |||
| ...... | ||||
| Group 32 | 31 | 248～255 (000～111) | 124 | 124 |
| 125 | 125 | |||
| 126 | 126 | |||
| 127 | 127 | |||
In the TD-SCDMA system, corresponding 4 the basic Midamble sign indicating numbers of each SYNC_DL (down-going synchronous) sign indicating number.After having determined the SYNC_DL sign indicating number of current area, also in 4 basic Midamble sign indicating numbers, confirm the basic Midamble sign indicating number that current area adopts.Finish DwPTS (descending synchronous code) synchronously after, just can find the Midamble part of TS0.The midamble shift1. of the fixing use of the beacon channel of TS0 K=8 carries out correlation computations with the Midamble data of the TS0 that receives respectively with 4 basic Midamble sign indicating numbers of SYNC_DL sign indicating number correspondence, calculate related power, find out the maximum of related power then, can determine the basic midamble that current area is used.
Existing 3GPP (3th Generation Partner Project, the plan of third generation partnership) TDD system, the descending midamble shift method of salary distribution has three kinds: default mode (Default mode), common way (Common mode) and UE ad hoc fashion (UE Specific mode).The Default mode is introduced in order to improve detection performance and minimizing system signaling expense, and it has defined the corresponding relation of midamble shift and channel code.Under the Default mode, according to predefined corresponding relation, UE can carry out joint-detection, thereby the interference of Serving cell is eliminated, and effectively reduces the multi-user interference in the sub-district.
When the TDD-CDMA system carried out the scale networking, work can be carried out in adjacent sub-district under identical frequency.Though in the network planning, can plan that spreading code is that the signal of neighbor cell is quadrature fully by the result of channel code and cell scrambling composite action to the code word that neighbor cell uses.In some cases, be in the user of cell edge, because the signal of neighbor cell is suitable with the service cell signal strength, it is interfered stronger, can exert an influence to receptivity.Under the situation of existing system design of protocol, when adopting associated detection technique to reduce interference,, can eliminate the interference of Serving cell because UE can only be known the midamble configuration information of Serving cell, but, then can't handle the interference that neighbor cell produces.
Summary of the invention
The invention provides a kind of method and device of eliminating neighbor cell interference, can only know the midamble configuration information of Serving cell in order to sub-district subscriber equipment in the solution prior art, and cause subscriber equipment can't eliminate the problem of neighbor cell interference thus.
The invention provides following technical scheme:
A kind of method that makes terminal equipment know neighbor cell midamble configuration information comprises step:
Insert the TDD-CDMA system determines current area according to community configured information all neighbor cells by time-division duplex;
Obtain the midamble midamble configuration information of each neighbor cell and send to terminal equipment in the described current area, wherein said midamble configuration information comprises the midamble method of salary distribution and miamble configuration parameter K at least.
Wherein: the TDD-CDMA system adopts system broadcast message that midamble midamble configuration information is sent to described current area; Perhaps the TDD-CDMA system adopts dedicated signaling to carry described midamble configuration information.
A kind of elimination neighbor cell interference method comprises the steps:
User equipment (UE) obtains the midamble midamble configuration information of each neighbor cell, and this information comprises basic midamble sign indicating number, the midamble shift method of salary distribution and miamble configuration parameter K;
Described UE is each neighbor cell of default mode at the midamble shift method of salary distribution, obtains the midamble skew of this neighbor cell and the corresponding relation of channel code according to described miamble configuration parameter K; And
Described UE carries out the joint-detection picked up signal according to described corresponding relation to corresponding neighbor cell and estimates, and utilizes this signal to estimate to eliminate neighbor cell interference.
A kind of network equipment that is applied in the TDD-CDMA system comprises:
Acquiring unit is used for determining according to community configured information all neighbor cells of current area, and obtains the midamble configuration information of each neighbor cell, and this information comprises the midamble shift method of salary distribution and miamble configuration parameter K;
Transmitting element is used for the midamble configuration information of described neighbor cell is sent to described current area.
A kind of subscriber equipment comprises:
Receiving element is used for the configuration information at the midamble of Serving cell reception of neighboring cell, and this information comprises the midamble shift method of salary distribution and miamble configuration parameter K;
Detecting unit, be used at the midamble shift method of salary distribution is each neighbor cell of default mode, obtain the midamble skew of this neighbor cell and the corresponding relation of channel code according to described miamble configuration parameter K, and according to described corresponding relation corresponding neighbor cell is carried out the joint-detection picked up signal and estimate;
Go interference units, utilize this signal to estimate to eliminate neighbor cell interference.
A kind of TDD-CDMA system comprises:
The network equipment is used to obtain the midamble configuration information of each neighbor cell of current area, and sends it to described current area, and described configuration information comprises the midamble shift method of salary distribution and miamble configuration parameter K;
Subscriber equipment, be used for receiving described midamble configuration information in described current area, and be each neighbor cell of default mode at the midamble shift method of salary distribution, obtain the midamble skew of this neighbor cell and the corresponding relation of channel code according to described miamble configuration parameter K, and according to described corresponding relation corresponding neighbor cell is carried out the joint-detection picked up signal and estimate, and utilize this signal to estimate to eliminate neighbor cell interference.
Beneficial effect of the present invention is as follows:
Adopt the present invention, UE can utilize adjacent sub-district midamble configuration information, and the effective elimination by associated detecting method or suppress interference from neighbor cell improves the quantity transmission quality.Interference further combined with prior art elimination Serving cell can realize once eliminating simultaneously the multi-user interference from Serving cell and neighbor cell, thereby increases substantially data transmission quality and increase channel capacity.
Description of drawings
Fig. 1 is at TD-SCDMA system configuration frame schematic diagram in the prior art;
Fig. 2 is the schematic diagram of burst structure in the prior art;
Fig. 3 is the communication system schematic diagram in the embodiment of the invention;
Fig. 4 A is the structural representation of base station equipment in the embodiment of the invention;
Fig. 4 B is the structural representation of subscriber equipment in the embodiment of the invention;
Fig. 5 is the flow chart that UE eliminates neighbor cell interference in the embodiment of the invention;
When Fig. 6 is default mode and miamble configuration parameter K=16 for the midamble shift method of salary distribution in the embodiment of the invention, the corresponding relation schematic diagram of midamble shift and channel code.
Embodiment
Can only know the midamble midamble configuration information of Serving cell in order to solve user equipment (UE) in the prior art, and cause subscriber equipment can't eliminate the problem of neighbor cell interference thus, the present invention notifies the midamble configuration information of UE neighbor cell, and UE adopts the interference of associated detection technique elimination from neighbor cell.
It is that the present invention is described in detail for example that present embodiment inserts (TD-SCDMA, Time DivisionSynchronization Code Division Multiple Access) system with TD SDMA.
The associated detection technique that adopts in the TD-SCDMA system is on the basis of traditional detection technology, make full use of and cause MAI (Multiple Access Interference, multiple access access interference) all subscriber signals that disturb and the prior information of multipath thereof, the separation of subscriber signal being used as the joint detection process that is mutually related of a unification finishes, thereby has good interference free performance, the reduction system is to the requirement of power control precision, therefore can effectively utilize the uplink spectrum resource more, improve power system capacity significantly.
When the midamble shift method of salary distribution is configured to the default mode, can finish the joint-detection of neighbor cell.The joint detection process of neighbor cell is similar with the joint detection process of Serving cell, also needs to know the corresponding relation of the basic midamble sign indicating number of neighbor cell and midamble shift and spreading code.Obtain channel estimating according to training sequence, and the spreading code that obtains using according to corresponding relation, the tectonic system matrix is estimated to carry out signal.
If will detect the transmission data, must know system transmission matrix, matrix is by the convolution decision of a plurality of users' spread spectrum code sequence and channel impulse response; Therefore the prerequisite of joint detection algorithm is the spread spectrum code sequence and the channel impulse response that can obtain all users.Because in the TD system, the user of same time slot generates the training sequence of different midamble shift as oneself according to identical basic midamble, corresponding relation according to training sequence and spreading code, just can obtain spread spectrum code sequence, further can estimate channel impulse response, thus can the tectonic system matrix.
Referring to Fig. 3, the UE1 of sub-district 1 is corresponding with a radio network controller (RNC), and the UE2 of neighbor cell 2 can be by this RNC or another RNC control.Above-mentioned two sub-districts are neighbor cell each other all, and the UE1 of sub-district 1 can be subjected to the interference from the UE2 of neighbor cell 2 in data transmission procedure.
In the present embodiment, RNC is the midamble configuration information notifying cell 1 of the neighbor cell 2 of sub-district 1, and is same, with the midamble configuration information notifying cell 2 of the neighbor cell 1 of sub-district 2.The midamble configuration information comprises basic midamble sign indicating number, the midamble shift method of salary distribution and miamble configuration parameter K.Several midamble shift (referring to 3GPP TS 25.221 agreements) can be arranged in time slot of K value representation.
UE eliminates the interference of Serving cell except the midamble configuration information that utilizes Serving cell, also further utilizes the midamble configuration information of neighbor cell, eliminates the interference of neighbor cell.
Consult shown in Fig. 4 A, the network terminal in the present embodiment comprises receiving element 400, acquiring unit 401, transmitting element 402 and control unit 403, and described receiving element 400 is used to receive the data that UE sends; Described acquiring unit 401 is used for determining according to community configured information all neighbor cells of current area, and obtains the midamble configuration information of each neighbor cell, and this information comprises basic midamble sign indicating number, the midamble method of salary distribution and miamble configuration parameter K; Transmitting element 402 is used for the midamble configuration information of described neighbor cell is sent to described current area; Control unit 403 is used to control receiving element 400, acquiring unit 401 and transmitting element 402.
Consult shown in Fig. 4 B, the UE in the present embodiment comprises receiving element 450, detecting unit 451, removes interference units 452 and transmitting element 453.Transmitting element 453 is used for sending data to network terminal; Receiving element 450 is used for receiving the data that network side sends at Serving cell, comprising the midamble configuration information of neighbor cell; It is each neighbor cell of default mode that detecting unit 451 is used at the midamble shift method of salary distribution, obtain the midamble skew of this neighbor cell and the corresponding relation of channel code according to described miamble configuration parameter K, and according to described corresponding relation corresponding neighbor cell is carried out the joint-detection picked up signal and estimate; Go interference units 452 to utilize this signal to estimate to eliminate neighbor cell interference.
Referring to Fig. 5, the handling process of eliminating neighbor cell interference in the present embodiment is as follows:
The UE of step 520, described current area is each neighbor cell of default mode at the midamble shift method of salary distribution, obtains the midamble skew of this neighbor cell and the corresponding relation of channel code according to described miamble configuration parameter K.
Under the default mode, sub-district midamble shift and channel code have fixing corresponding relation, and for example, the corresponding relation during K=16 as shown in Figure 6.
In the present embodiment, network side can issue the midamble configuration information of its neighbor cell in the following ways to the sub-district:
One, adopt system message to broadcast the midamble configuration information of adjacent sub-district
Under the signaling definition format of prior art, the part cell does not use in the system message, therefore can redefine untapped cell, is used for carrying the midamble configuration information of neighbor cell; In addition, also can add new IE, promptly on the basis of original signaling, expand the IE that makes new advances, be used for carrying the midamble configuration information of neighbor cell.Below providing example respectively describes:
A, carry the midamble configuration information of neighbor cell by redefining IE
The ASN.1 of (R4, the 4th version) System information block 5 SIB5 in the existing system (Abstract SyntaxNotation One, abstract syntax mark) structure is as follows:
SysInfoType5::＝ SEQUENCE{
sib6indicator BOOLEAN，
-Physical channel IEs
pich-PowerOffset PICH-PowerOffset，
modeSpecificInfo CHOICE{
fdd SEQUENCE{
aich-PowerOffset AICH-PowerOffset
}，
tdd SEQUENCE{
--If PDSCH/PUSCH is configured for 1.28Mcps TDD，the following IEs should be absent
--and the info included in the tdd128SpecificInfo instead.
pusch-SysInfoList-SFN PUSCH-SysInfoList-SFN OPTIONAL，
pdsch-SysInfoList-SFN PDSCH-SysInfoList-SFN OPTIONAL，
openLoopPowerControl-TDD OpenLoopPowerControl-TDD
}
}，
......
}
Wherein the tdd content in the modeSpecificInfo structure is defined, but is obsolete to TDD 128, so can redefine this part content, is used for carrying the midamble information of neighbor cell, is defined as follows:
SysInfoType5::＝ SEQUENCE{
sib6indicator BOOLEAN，
--Physical channel IEs
pich-PowerOffset PICH-PowerOffset，
modeSpecificInfo CHOICE{
fdd SEQUENCE{
aich-PowerOffset AICH-PowerOffset
}，
Tdd SEQUENCE{ // following IEs carries midamble information
--If PDSCH/PUSCH is configured for1.28Mcps TDD，
--the info included in the tdd128SpecificInfo should be uesd instead.
pusch-SysInfoList-SFN PUSCH-SysInfoList-SFN OPTIONAL，
pdsch-SysInfoList-SFN PDSCH-SysInfoList-SFN OPTIONAL，
openLoopPowerControl-TDD OpenLoopPowerControl-TDD
}
}，
......
}
Wherein: PUSCH-SysInfoList-SFN is used for carrying the midamble information of homogeneous frequency adjacent area; PDSCH-SysInfoList-SFN is used for carrying the midamble information of alien frequencies neighbor cell; The purposes of OpenLoopPowerControl-TDD is not done description in the present embodiment, this IE of terminal disregards in the present embodiment.
More than the IE structure of Xiu Gaiing is only effective to being included among the SIB5/SIB6 structure of modeSpecificInfo, and the description among other message IE is with unaffected.
B, the new IE of interpolation carry the midamble configuration information of neighbor cell
By the expansion item of nonCriticalExtensions, in original signaling, increase the midamble configuration information that new IE carries neighbor cell.With SIB11 message is example, and the ASN.1 of SIB11 is carried out following expansion:
SysInfoType11::＝ SEQUENCE{
sib12indicator BOOLEAN，
--Measurement IEs
fach-MeasurementOccasionInfo FACH-MeasurementOccasionInfo OPTIONAL，
measurementControlSysInfo MeasurementControlSysInfo，
--Extension mechanism for non-release99 information
v4b0NonCriticalExtensions SEQUENCE{
sysInfoType11-v4b0ext SysInfoType11-v4b0ext-IEs OPTIONAL，
vxyzNonCriticalExtensions SEQUENCE{
sysInfoType11-vxyzext SysInfoType11-vxyzext-IEs OPTIONAL，
nonCriticalExtensions SEQUENCE{} OPTIONAL
} OPTIONAL
} OPTIONAL
}
SyslnfoType11-vxyzext-IEs::＝SEQUENCE{
neighbourCellMidambleInfo NeighbourCellMidambleInfo-IEs OPTIONAL
}
NeighbourCellMidambleInfo-IEs::＝SEQUENCE{
intraFreqCellMidambleInfo SEQUENCE(SIZE(1..maxCellMeas))OF
IntraFreqCellMidambleInfo-IEs OPTIONAL，
interFreqCellMidambleInfo SEQUENCE(SIZE(1..maxCellMeas))OF
InterFreqCellMidambleInfo-IEs OPTIONAL，
}
IntraFreqCellMidambleInfo-IEs ::＝SEQUENCE{
cellParametersID CellParametersID，
midambleInfo SEQUENCE(SIZE(1..maxTS))OF Midamblelnfo-IEs
}
InterFreqCellMidambleInfo-IEs ::＝SEQUENCE{
frequencyInfo FrequencyInfo OPTIONAL，
cellParametersID CellParametersID，
midambleInfo SEQUENCE(SIZE(l..maxTS))OF MidambleInfo-IEs
}
MidambleInfo-IEs ::＝SEQUENCE{
timeslot TimeslotNumber-LCR-r4，
--Actual value midambleConfiguration＝IE value*2
midambleConfiguration INTEGER(1..8)
}
Said structure increases an expansion nonCriticalExtensions on original IE, described nonCriticalExtensions expands cell sysInfoType11-vxyzext, on this signaling basics, further expand cell neighbourCellMidambleInfo, this cell is used for carrying the midamble configuration information of neighbor cell, this cell neighbourCellMidambleInf comprises cell IntraFreqCellMidambleInfo-IEs and InterFreqCellMidambleInfo-IEs, wherein IntraFreqCellMidambleInfo-IEs is used for carrying the midamble configuration information of co-frequency neighbor cell, and InterFreqCellMidambleInfo-IEs is used for carrying the midamble configuration information of alien frequencies neighbor cell.Can obtain cell Parameters ID by above-mentioned two orders, further can obtain MidambleInfo-IEs, comprise the midamble configuration information of neighbor cell among the MidambleInfo-IEs.
Alter mode to SIB12 (perhaps other system message) is identical with the alter mode of SIB11, by above modification, can allow network notify the midamble configuring condition of UE neighbor cell by system message on the basis of compatible 3GPP agreement.
Two, adopt dedicated signaling to issue the midamble configuration information of adjacent sub-district
Wireless-transmission network can confirm that CellUpdateConfirm, measurement control MeasurementControl, physical channel reprovision PhysicalChannelReconfiguration, radio bearer reprovision RadioBearerReconfiguration, radio bearer are set up RadioBearerSetup, the midamble configuration information that many signalings such as RRCConnectionSetup, transmission channel reprovision TransportChannelReconfiguration are carried neighbor cell is set up in wireless connections by cell update, and it is passed to UE.Be that example describes below with MeasurementControl.
Dedicated signaling MEASUREMENT CONTROL has definition in agreement TS 25.33110.2.17, this dedicated signaling is to be used for UTRAN to send to UE and set up, revise or discharge measurement.RLC-SAP (Radio Link Control, Radio Link control; Service Access Point, Service Access point) be AM (Acknowledged mode affirmation mode); Logical channel (logic channel) adopts DCCH (Dedicated Control Channel); Transmission Direction (direction) is the downlink transmission from UTRAN to UE.MeasurementControl message form is amended as follows:
| Information Element/Group name | Need | Multi | Type and reference | Semantics description |
| Message Type | MP | Message Type | ||
| ...... | ||||
| ＞UE internal measurement | UE internal measurement 10.3.7.77 | |||
| Measurement Information extension | OP | Neighbour Cell Midamble Information 10.x.x.x | ||
| Physical channel information elements | ||||
| DPCH compressed mode status info | OP | DPCH compressed mode status info 10.3.6.34 |
The Midamble configuration information of neighbor cell is as follows:
| Information Element/Group name | Need | Multi | Type and reference | Semantics description | |
| Intra-CeH | OP | 1 to <maxCellMeas> | |||
| ＞CellParametersID | MP | Integer (0..127) | |||
| ＞ | MP | 1 to<maxTS> | |||
| ＞＞timeslot | MP | Integer(1..6) | |||
| ＞＞midambleConfigur | MP | Integer(2，4， |
| Information Element/Group name | Need | Multi | Type and refefence | | |
| ation | |||||
| 6，8，10，12， 14，16) | |||||
| Inter-Cell | OP | 1 to <maxCellMeas> | |||
| ＞Frequency info | MD | Frequency info10.3.6.36 | Default value is the value of the previous ″frequency info″in the list. NOTE：The first occurrence is then MP. | ||
| ＞CellParametersID | MP | Integer (0..127) | |||
| ＞ | MP | 1 to<maxTS> | |||
| ＞＞timeslot | MP | Integer(1..6) | |||
| ＞＞midambleConfigur ation | MP | Integer(2，4， 6，8，10，12， 14，16) |
ASN.1 to MeasurementControl message is amended as follows accordingly:
MeasurementControl::＝CHOICE{
--The Rel-4 functionality of UE Positioning OTDOA AssistanceData for TDD is onlyavailable
--in the later-than-r3 branch of this message(i.e.through the use of the IE
--ue-Positioning-OTDOA-AssistanceData-r4)
r3 SEQUENCE{
Ignore obsolete R3 content ...
}，
later-than-r3 SEQUENCE{
rrc-TransactionIdentifier RRC-TransactionIdentifier，
criticalExtensions CHOICE {
r4 SEQUENCE{
measurementControl-r4 MeasurementControl-r4-IEs，
v4d0NonCriticalExtensions SEQUENCE{
--Container for adding non critical extensions after freezing REL-5
measurementControl-r4-add-ext BIT STRING OPTIONAL，
nonCriticalExtensions SEQUENCE{} OPTIONAL
} OPTIONAL
}，
criticalExtensions SEQUENCE{}
}
}
}
Wherein " measurementControl-r4-add-ext BIT STRING OPTIONAL; " it is the compatible expansion item of 3GPP ASN.1, can be to this VLEC (Variable lengthextension containers, variable length expansion item) the expansion item is expanded, carry the midamble configuration information of neighbor cell, specifically expand as follows: measurementControl-r4-add-ext BIT STRING (CONTAININGMeasurementControl-r4-add-ext-IEs) OPTIONAL
The organization definition that the organization definition of MeasurementControl-r4-add-ext-IEs can be added the SysInfoTypel 1-vxyzext-IEs described in the new IE with aforementioned method one so just can be carried the midamble configuration information of Serving cell and neighbor cell simultaneously.
By above modification, can on the basis of compatible existing standard agreement, allow network notify the midamble configuring condition of UE neighbor cell.Can obtain the midamble configuring condition of Serving cell and neighbor cell simultaneously, can adopt associated detection technique to eliminate the interference of Serving cell and neighbor cell simultaneously, improve systematic function.
Because it is even more important for the user who is in cell edge to eliminate adjacent area interference, therefore, adopting dedicated signaling to issue under the situation of adjacent sub-district midamble configuration information, can determine the user of the adjacent sub-district of needs midamble configuration information according to certain measurement reporting information.For example the neighbor cell pilot measurement reports that reports according to UE is provided with certain threshold value, and the user of this information of needs is screened, and determines to need to send the UE of this information, and this information is sent to the UE that needs.Like this, make the UE of cell edge can adopt associated detection technique to eliminate the interference of neighbor cell.
In the present embodiment, the midamble configuration information of neighbor cell comprises the basic midamble of neighbor cell, the K value of the midamble shift method of salary distribution and use is considered from the complete equal angles of signaling consumption and amount of information, and the content-form of midamble configuration information can be in the following ways:
1, the relativeness of notice all neighbor cells of UE and Serving cell midamble configuration.This is the relativeness of all neighbor cells of a kind of simple identification and Serving cell, promptly uses a bit sign to represent whether all neighbor cell midamble methods of salary distribution are all identical with the Serving cell mode, implies to comprise whether the K value is identical.This mode, information bit (bit or the byte) minimum number that need increase, also minimum to the modification of system, the adjacent cell information under the typical applicable cases can be provided with the cost of minimum, thereby realize that multi-plot joint in typical case detects; Certainly, it is less that this mode offers the amount of information of UE, can only be in typical case for the information that provides be provided multi-plot joint, its effect of system of flexible configuration is subjected to a certain degree restriction.As shown in the table:
| Data | Sign position (whether all neighbor cells are identical with Serving cell midamble configuration) 0/1 |
2, provide neighbor cell list, represent the corresponding situation of neighbor cell and Serving cell successively, can divide following two kinds of situations:
A, use one bit sign represent whether the corresponding neighbor cell midamble method of salary distribution is identical with the Serving cell mode, imply to comprise whether the K value is identical.Whether identical available 0/1 expression.This mode with respect to method 1, is distinguished different neighbor cells, and the information that UE obtains increases to some extent.As shown in the table:
| |
|
|
...... |
| (whether identical) 0/1 with the Serving cell configuration | 0/1 | 0/1 |
Whether whether B, to divide two parts to represent to the midamble method of salary distribution and K value identical with the Serving cell mode, identical available 0/1 expression.The information bit number that needs to increase increases to some extent than A, but the further refinement of information that UE obtains.As shown in the table:
| |
|
|
...... | |||
| midamble | K | midamble | K | midamble | K | |
| 0/1 | 0/1 | 0/1 | 0/1 | 0/1 | 0/1 | |
3, provide neighbor cell list, clearly provide the midamble method of salary distribution of neighbor cell and concrete K value.It is more that this mode, notice need the signaling traffic load of increase to increase, but the information that terminal UE obtains is the most complete, can according to the information of knowing from network, judge whether and can effectively eliminate the interference of neighbor cell under various configuring conditions flexibly.The signaling that increases can estimate simply that also for example in the TD-SCDMA system, the midamble method of salary distribution has three kinds, can be represented by 2bit, and the K value has 8 kinds, can represent with 3bit.This mode, UE obtains to carry out the most complete information that neighbor cell interference is eliminated, and when clear and definite neighbor cell is the default mode, can effectively eliminate neighbor cell interference.As shown in the table:
| |
|
|
...... | |||
| midamble | K | midamble | K | midamble | K | |
| Default (00) | 16 (111) | Common (01) | 16 (111) | UE Specific(10) | 8 (110) | |
In above-mentioned information, the method for expressing of the midamble method of salary distribution also can be simplified, and only is concerned about whether be the default mode.For not being that default mode or the information of not knowing the sub-district can be represented with a kind of state.As shown in the table:
| |
|
|
...... | |||
| midamble | K | midamble | K | midamble | K | |
| Default(0) | 16 (111) | Common (1) | 16 (111) | UE Specific(1) | 8 (110) | |
4, for the fixing scene of using the midamble configuration in the system, be that the whole network midamble method of salary distribution is defined as the default mode, when the K value is fixed as a determined value, can equivalence be a special case, be the configuration information that UE can be obtained neighbor cell by predefined mode, system does not need to adopt demonstration means of signaling notice UE again.
Above-mentioned network side is with the method for the midamble configuration information notifying cell UE of neighbor cell and do not rely on UE and be used to eliminate adjacent area interference, this method can also be used for UE and need other application scenarioss of this information, so network side can independently use the method for the midamble configuration information notifying cell UE of neighbor cell.
Because present embodiment provides the method for the midamble configuration information that obtains neighbor cell, also provide the method for this information of UE in the notification service sub-district simultaneously, so UE can adopt the interference of associated detection technique elimination from neighbor cell in the Serving cell.UE can adopt associated detection technique to eliminate the interference of multi-user in the Serving cell in the prior art at present, further combined with the method that is provided in the present embodiment, UE can eliminate the multi-user interference from Serving cell and neighbor cell simultaneously, data transmission quality is provided greatly, has increased channel capacity.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (16)
1, a kind of method that makes terminal equipment know neighbor cell midamble configuration information is characterized in that, comprises step:
Insert the TDD-CDMA system determines current area according to community configured information all neighbor cells by time-division duplex;
Obtain midamble (midamble) configuration information of each neighbor cell and send to terminal equipment in the described current area, wherein said midamble configuration information comprises the midamble skew midamble shift method of salary distribution and miamble configuration parameter K at least.
2, the method for claim 1 is characterized in that, the TDD-CDMA system adopts system broadcast message that midamble midamble configuration information is sent to described current area.
3, method as claimed in claim 2 is characterized in that, untapped cell carries described midamble configuration information in the employing system broadcast message; Perhaps
Employing is expanded cell and is carried described midamble configuration information in system broadcast message.
4, the method for claim 1 is characterized in that, the TDD-CDMA system adopts dedicated signaling to carry described midamble configuration information.
As each described method of claim 1 to 4, it is characterized in that 5, the relativeness that adopts all neighbor cells and current area midamble to dispose is described the midamble configuration information of neighbor cell; Perhaps, adopt the relativeness of in neighbor cell, representing each neighbor cell and current area midamble configuration successively to describe the midamble configuration information of neighbor cell; Perhaps, adopt the midamble skew midamble shift method of salary distribution and the miamble configuration parameter K value that in neighbor cell, indicates each neighbor cell.
6, a kind of method of eliminating neighbor cell interference is characterized in that, comprises the steps:
User equipment (UE) obtains the midamble midamble configuration information of each neighbor cell, and this information comprises the midamble skew midamble shift method of salary distribution and miamble configuration parameter K;
Described UE is each neighbor cell of default mode at the midamble skew midamble shift method of salary distribution, obtains the midamble skew of this neighbor cell and the corresponding relation of channel code according to described miamble configuration parameter K; And
Described UE carries out the joint-detection picked up signal according to described corresponding relation to corresponding neighbor cell and estimates, and utilizes this signal to estimate to eliminate neighbor cell interference.
7, method as claimed in claim 6 is characterized in that, the TDD-CDMA system adopts system broadcast message that midamble midamble configuration information is sent to described current area.
8, method as claimed in claim 7 is characterized in that, untapped cell carries described midamble configuration information in the employing system broadcast message; Perhaps
Employing is expanded cell and is carried described midamble configuration information in system broadcast message.
9, method as claimed in claim 6 is characterized in that, the TDD-CDMA system adopts dedicated signaling to carry described midamble configuration information.
As each described method of claim 6 to 9, it is characterized in that 10, the relativeness that adopts all neighbor cells and current area midamble to dispose is described the midamble configuration information of neighbor cell; Perhaps, adopt the relativeness of in neighbor cell, representing each neighbor cell and current area midamble configuration successively to describe the midamble configuration information of neighbor cell; Perhaps, adopt the midamble method of salary distribution and the miamble configuration parameter K value that in neighbor cell, indicates each neighbor cell.
11, method as claimed in claim 6 is characterized in that, UE obtains the midamble configuration information of neighbor cell by the predefine mode.
12, a kind of network equipment that is applied in the TDD-CDMA system is characterized in that, comprising:
Acquiring unit is used for determining according to community configured information all neighbor cells of current area, and obtains the midamble configuration information of each neighbor cell, and this information comprises the midamble shift method of salary distribution and miamble configuration parameter K;
Transmitting element is used for the midamble configuration information of described neighbor cell is sent to described current area.
13, a kind of subscriber equipment is characterized in that, comprising:
Receiving element is used for the configuration information at the midamble of Serving cell reception of neighboring cell, and this information comprises the midamble shift method of salary distribution and miamble configuration parameter K;
Detecting unit, be used at the midamble shift method of salary distribution is each neighbor cell of default mode, obtain the midamble skew of this neighbor cell and the corresponding relation of channel code according to described miamble configuration parameter K, and according to described corresponding relation corresponding neighbor cell is carried out the joint-detection picked up signal and estimate;
Go interference units, utilize this signal to estimate to eliminate neighbor cell interference.
14, a kind of TDD-CDMA communication system is characterized in that, comprising:
The network equipment is used to obtain the midamble configuration information of each neighbor cell of current area, and sends it to described current area, and described configuration information comprises the midamble shift method of salary distribution and miamble configuration parameter K;
Subscriber equipment, be used for receiving described midamble configuration information in described current area, and be each neighbor cell of default mode at the midamble shift method of salary distribution, obtain the midamble skew of this neighbor cell and the corresponding relation of channel code according to described miamble configuration parameter K, and according to described corresponding relation corresponding neighbor cell is carried out the joint-detection picked up signal and estimate, and utilize this signal to estimate to eliminate neighbor cell interference.
15, system as claimed in claim 14 is characterized in that, the described network equipment comprises:
Acquiring unit is used for determining according to community configured information all neighbor cells of current area, and obtains the midamble configuration information of each neighbor cell, and this information comprises the midamble shift method of salary distribution and miamble configuration parameter K;
Transmitting element is used for the midamble configuration information of described neighbor cell is sent to described current area.
16, as claim 14 or 15 described systems, it is characterized in that described subscriber equipment comprises:
Receiving element is used for the configuration information at the midamble of Serving cell reception of neighboring cell, and this information comprises the midamble shift method of salary distribution and miamble configuration parameter K;
Detecting unit, be used at the midamble shift method of salary distribution is each neighbor cell of default mode, obtain the midamble skew of this neighbor cell and the corresponding relation of channel code according to described miamble configuration parameter K, and according to described corresponding relation corresponding neighbor cell is carried out the joint-detection picked up signal and estimate;
Go interference units, utilize this signal to estimate to eliminate neighbor cell interference.
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| CN2006100894283A CN101098184B (en) | 2006-06-26 | 2006-06-26 | Method and apparatus for eliminating interference between adjacent cells |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102420678A (en) * | 2010-09-28 | 2012-04-18 | 中兴通讯股份有限公司 | Notification method and system of independent midamble configuration information |
| CN103841065A (en) * | 2014-02-17 | 2014-06-04 | 清华大学 | Non-orthogonal multi-user access and sending and combined receiving, demodulation and coding system and method |
| CN104254978A (en) * | 2012-05-11 | 2014-12-31 | 富士通株式会社 | Interference suppression method, device and system in hierarchical networking of heterogeneous network |
| CN106059601A (en) * | 2011-05-20 | 2016-10-26 | 株式会社Ntt都科摩 | Reception device, transmission device and wireless communications method |
| CN103701735B (en) * | 2013-12-26 | 2017-02-08 | 大唐移动通信设备有限公司 | Multiple cell-based same-frequency joint detection method and device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW376601B (en) * | 1995-08-01 | 1999-12-11 | Siemens Ag | Method and arrangement for reducing common channel interference in radio system with a cellular structure |
| EP1205049A1 (en) * | 1999-08-16 | 2002-05-15 | Roke Manor Research Limited | Method of estimating inter-cell interference in a telecommunications system |
| CN100401646C (en) * | 2004-09-24 | 2008-07-09 | 大唐移动通信设备有限公司 | Multi region combined detection method of time gap code division multi address system |
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2006
- 2006-06-26 CN CN2006100894283A patent/CN101098184B/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102420678A (en) * | 2010-09-28 | 2012-04-18 | 中兴通讯股份有限公司 | Notification method and system of independent midamble configuration information |
| CN102420678B (en) * | 2010-09-28 | 2016-03-30 | 中兴通讯股份有限公司 | The Notification Method of independent midamble configuration information and system |
| CN106059601A (en) * | 2011-05-20 | 2016-10-26 | 株式会社Ntt都科摩 | Reception device, transmission device and wireless communications method |
| CN104254978A (en) * | 2012-05-11 | 2014-12-31 | 富士通株式会社 | Interference suppression method, device and system in hierarchical networking of heterogeneous network |
| CN103701735B (en) * | 2013-12-26 | 2017-02-08 | 大唐移动通信设备有限公司 | Multiple cell-based same-frequency joint detection method and device |
| CN103841065A (en) * | 2014-02-17 | 2014-06-04 | 清华大学 | Non-orthogonal multi-user access and sending and combined receiving, demodulation and coding system and method |
| CN103841065B (en) * | 2014-02-17 | 2018-07-06 | 清华大学 | Nonopiate multiple access is sent and joint receives demodulation coding system and method |
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| Publication number | Publication date |
|---|---|
| CN101098184B (en) | 2012-04-25 |
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