CN104243012B - A kind of frame structure allocation method and device in TDD system - Google Patents
A kind of frame structure allocation method and device in TDD system Download PDFInfo
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Abstract
The invention proposes a kind of in TDD eIMTA scene, and network assistance user executes interference eliminates the method for inhibiting operation.In one embodiment, serving cell sends the identifier of neighboring community and frame structure enables target UE accurately to eliminate inhibition downlink adjacent cell interference.By using technical solution provided in the present invention, solve the problems, such as that UE can not accurately execute interference elimination inhibition operation in eIMTA scene, while utmostly maintaining the compatibility with existing system.
Description
Technical field
The present invention relates to the schemes that frame structure in time-division bis- (TDD-Time Division Duplex) systems distributes, especially
It is to be related to the tdd frame structure allocation plan based on long term evolution (LTE-Long Term Evolution) framework.
Background technique
Traditional third generation cooperative partner program (3GPP-3rd Generation Partner Project) long term evolution
In (LTE-Long Term Evolution) system, time division duplex (TDD-Time Division Duplex) system is defined
Frame structure, as shown in table 1, wherein D indicate downlink subframe, U indicate sub-frame of uplink, S is special subframe:
Table 1:TDD LTE frame structure
3GPP introduces enhancing interference management transmission adjustment (eIMTA-Enhanced in version (R-Release) 11
Interference Traffic Adaptation) research topic, main thought is the need according to cell uplink and downlink portfolio
It asks, adjusts the frame structure of TDD system faster.3GPP has evaluated three kinds of possible adjustment periods:
● 640 milliseconds (ms-millisecond): existing R11 system can pass through system information block (SIB-System
Information Block) it supports
● 100ms: existing R11 system is not supported, is realized by RRC signaling
● 10ms: existing R11 system is not supported, is realized by dynamic signaling
The adjustment period of 10ms can provide maximum freedom degree and performance gain, thus eventually become 3GPP R12 introducing
EIMTA scheme.It is the frame structure for passing through common physical layer signaling dynamic configuration present frame that conclusion is reached in RAN1#73 meeting.
Further, Restrain measurement (NAICS:Network- is eliminated in the interference that 3GPP R12 starts network assistance
Assisted Interference Cancellation and Suppression).There are no true for specific NAICS scheme
Fixed, concept is that UE is enabled more effectively to execute interference elimination or AF panel behaviour by the information that network assistance issues
Make, the possible information that issues includes interference characteristic, the sending method of interference, interference band, adjacent cell reference signal, the tune of interference
Coding mode processed etc..
Summary of the invention
Inventors discovered through research that for serving cell, the downlink signal of usual adjacent cell is done in TDD system
Disturb the interference of significantly larger than uplink signal.Inventor is it has furthermore been found that introduce after eIMTA technology, adjacent cell and serving cell
Frame structure configuration can be different, i.e. the downlink subframe of serving cell correspond to the sub-frame of uplink of adjacent cell, thus needs newly
Solution is to support NAICS.
The invention discloses the sides that frame structure acquisition is carried out in a kind of user equipment (UE) of time division duplex (TDD) system
Method, wherein include the following steps:
It receives the first signaling and obtains K cell i1i2…iKIdentifier i1i2…iK
Receive the frame structure s that the second signaling obtains the K cell1s2…sK
Wherein, cell ikFrame structure be sk, the K is greater than the integer equal to 1, and the k is more than or equal to 1 and is less than or equal to
K, the K cell do not include the cell for sending first signaling and second signaling.The identifier is one of the following:
● physical cell identifier, by primary synchronization signal (PSS-Primary Synchronized Signal)/auxiliary synchronization
Signal (SSS-Secondary Synchronized Signal) mark.
● cellular global identity accords with (CGI-Cell Global Identifier), and the whole network is unique.
The quantity of above-mentioned physical cell identifier is 504, can theoretically be identified by 9 information bits, however one
A little special screnes are when for example cellulor is largely disposed, it is possible that cell identifier is in short supply.Above-mentioned cellular global identity symbol can
To support sufficient amount of cell, however need more -28 bits of information bit.
Specifically, according to an aspect of the present invention, which is characterized in that first signaling is high-level signaling
Specifically, according to another aspect of the invention, which is characterized in that second signaling is physical layer signaling
First signaling and second signaling are sent by the serving cell of UE, it is contemplated that the interfered cell of UE is generally not
Meeting dynamic change, first signaling are high-level signaling, such as wireless heterogeneous networks (RRC-Radio Resource
Control) signaling.Further first signaling is the RRC common signaling either proprietary signaling of RRC, the former is for cell
Interior all users are applicable in, and the latter is only applicable to particular UE.In order to support eIMTA, second signaling is physical layer signaling, into one
Step, second signaling is the specific signaling of cell or the specific signaling of UE, the former more saves resource overhead, and the latter is more clever
It is living.
If quick interfered cell is supported to select, first signaling is physical layer signaling, and second signaling is also
Physical layer signaling.
As one embodiment, first signaling is system information block, wherein including the K cell identifier, institute
Stating the second signaling is common downlink physical layer signaling, wherein including K cell i described in present frame1i2…iKFrame structure.
Specifically, according to an aspect of the present invention, which is characterized in that further include following steps:
It is executed in subframe t and is directed to cellSignal execute interference eliminate inhibit operation
Wherein, the subframe t is in the cellFrame structureIn
It is downlink subframe, it is describedIt is the i1i2…iKSubset.
Even if the interference that UE receives neighboring community is main after eIMTA introducing leads to the frame structure difference of neighboring community
It is that downlink interference-uplink interference is typically small and be difficult to carry out interference and eliminate inhibit operation.Therefore, UE is primarily directed to neighbouring small
The downlink signal in area, which executes interference and eliminates, inhibits operation, and for different downlink signal types, operating method is also different.It is typical
Operating method have: for some cell common signals such as cell common reference signal (CRS-Cell Reference
Signal)/PSS/SSS/ Physical Broadcast Channel (PBCH-Physical Broadcasting Channel), UE execute non-linear
Interference cancellation operation first estimates adjacent cell to the channel impulse response of UE, then recovers the CRS/ of adjacent cell
PSS/SSS/PBCH signal receives signal in the interference of UE receiver, and UE receives signal and subtracts the interference reception signal；For
Data-signal (PDSCH-Physicai Downlink Shared Channel) executes AF panel operation, i.e., first estimates neighbour
Nearly cell arrives the channel impulse response of UE, and then constructs prewhitening filter and receive signal execution whitening operation to UE.
UE theoretically can be to all cell is1i2…iKDownlink interference signal execute interference eliminate inhibit operation,
However in view of the channel for inhibiting to need to estimate adjacent cell is eliminated in interference, the signal of adjacent cell is considered in practical operation
Intensity, UE can independently determine to eliminate all or part of cell i1i2…iKIn downlink interference signal, specific algorithm
Belong to realization related content.
The invention discloses in a kind of system equipment of time division duplex (TDD) system carry out frame structure configuration method,
In, include the following steps:
It sends the first signaling and indicates K cell i1i2…iKIdentifier i1i2…iK
Send the frame structure s that the second signaling indicates the K cell1s2…sK
Wherein, cell ikFrame structure be sk, the K is greater than the integer equal to 1, and the k is more than or equal to 1 and is less than or equal to
K, the K cell do not include the transmission cell of first signaling and second signaling.
Specifically, according to an aspect of the present invention, which is characterized in that first signaling is high-level signaling
Specifically, according to another aspect of the invention, which is characterized in that second signaling is physical layer signaling
The invention discloses a kind of user equipment (UE), which is characterized in that the equipment includes:
First module: it receives the first signaling and obtains K cell i1i2…iKIdentifier i1i2…iK
Second module: the frame structure s that the second signaling obtains the K cell is received1s2…sK
Wherein, cell ikFrame structure be sk, the K is greater than the integer equal to 1, and the k is more than or equal to 1 and is less than or equal to
K, the K cell do not include the transmission cell of first signaling and second signaling.
As one embodiment, in above equipment further include:
Third module: it is executed in subframe t and is directed to cellSignal execute interference eliminate inhibit
Operation
Wherein, the subframe t is in the cellFrame structure
In be downlink subframe, it is describedIt is the i1i2…iKSubset.
The invention discloses a kind of system equipments, which is characterized in that the equipment includes:
First module: it sends the first signaling and indicates K cell i1i2…iKIdentifier i1i2…iK
Second module: the frame structure s that the second signaling indicates the K cell is sent1s2…sK
Wherein, cell ikFrame structure be sk, the K is greater than the integer equal to 1, and the k is more than or equal to 1 and is less than or equal to
K, the K cell do not include the transmission cell of first signaling and second signaling.
The present invention solves the problems, such as that UE can not accurately execute interference elimination inhibition operation in eIMTA scene, pass through network
The frame structure for issuing neighboring community enables target UE accurately to eliminate inhibition downlink adjacent cell interference, and the present invention is utmostly kept
And the compatibility of existing system.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, of the invention other
Feature, objects and advantages will become more apparent:
Fig. 1 shows UE according to an embodiment of the invention and receives serving cell signaling two adjacent cell frames of acquisition
The schematic diagram of structure；
The signaling that serving cell is sent, which is received, Fig. 2 shows UE according to an embodiment of the invention obtains adjacent cell
The flow diagram of frame structure；
Fig. 3 shows the structural block diagram according to an embodiment of the invention for the device in UE；
Specific embodiment
Technical solution of the present invention is described in further detail below in conjunction with attached drawing, it should be noted that do not rushing
In the case where prominent, the feature in embodiments herein and embodiment can be arbitrarily combined with each other.
Embodiment 1
Embodiment 1 illustrates UE and receives serving cell signaling two adjacent cell frame structures of acquisition, as shown in Fig. 1.It is attached
In Fig. 1, cell 10 is the serving cell of UE40, and cell 20 and cell 30 are two adjacent cells of cell 10.UE40 receives special
There is RRC signaling to obtain the cell identifier of cell 20 and cell 30, receives descending scheduling signaling acquisition cell 20 and cell 30 exists
The frame structure of present frame.The proprietary RRC signaling and the descending scheduling signaling are all the specific signalings of UE, by the cell 10
By eating dishes without rice or wine, connection 104 is sent.The cell 20 is sent to by X2 interface in the frame structure of present frame by the cell 20 small
Area 10, as shown in the connection of attached drawing 1 201.The cell 30 is sent by the cell 30 by X2 interface in the frame structure of present frame
To cell 10, as shown in the connection of attached drawing 1 301.The connection 201 and the connection 301 are not eated dishes without rice or wine, and are represented by dotted lines.
Embodiment 2
Embodiment 2 illustrates UE and receives the process that the signaling that serving cell is sent obtains adjacent cell frame structure, such as attached drawing 2
It is shown.In attached drawing 2, cell i 3 is the serving cell of UEul, and cell i 1 and cell i 2 are the adjacent cell of the cell i 3, step
In s11, i3 sends the cell identifier of the first physical layer signaling instruction i1 and i2, respectively i1, i2.In step s12, i3 is sent
Second physical layer signaling indicates that the frame structure of the present frame of i1 cell and i2 cell is respectively s1, s2, and it is 2 that wherein s1, which is 1, s2,.
First physical layer signaling and second physical layer signaling are the same Physical Downlink Control Channel (PDCCH-Physical
Downlink Control Channel) different information bits.
In step s21, it is respectively i1, i2, step that u1, which receives first physical signaling and obtains the cell identifier of i1 and i2,
In rapid s22, u1 receives second physical signaling and obtains i1 cell, and i2 cell is respectively #1, #2 in the frame structure of present frame.
In step s31, i1 sends downlink letter in the subframe 0/1/4/5/6/9 (downlink subframe of frame structure #1) of present frame
Number, in step s41, i2 sends downlink signal in the subframe 0/1/3/4/5/6/8/9 (downlink subframe of frame structure #2) of present frame.
In step s23, u1, which executes interference and eliminates, inhibits operation.Operative algorithm first is that:
It executes in subframe 0/1/4/5/6/9 to i1 cell, the interference of i2 cell, which is eliminated, inhibits operation
It executes the interference to i2 cell in subframe 3/8 and eliminates and inhibit operation.
Operative algorithm second is that:
It executes the interference to i1 cell in subframe 0/1/4/5/6/9 and eliminates and inhibit operation
Above-mentioned algorithm two does not execute the interference cancellation operation to i2 cell.
Embodiment 3
Embodiment 3 illustrates the structural block diagram for the device in UE, as shown in Fig. 3.Device in attached drawing 3, in UE
300 include three devices: reception device 301, and reception device 302, interference, which is eliminated, inhibits device 303.The reception device 301 connects
It receives the first signaling and obtains adjacent cell identifier, the reception device 302 receives the second signaling and obtains adjacent cell frame structure, does
Disturbing to eliminate inhibits device 303 to execute interference elimination suppression according to downlink signal of the adjacent cell frame structure to the adjacent cell
System operation.
Those of ordinary skill in the art will appreciate that all or part of the steps in the above method can be referred to by program
Related hardware is enabled to complete, described program can store in computer readable storage medium, such as read-only memory, hard disk or light
Disk etc..Optionally, one or more integrated circuit can be used also to realize in all or part of the steps of above-described embodiment.Phase
It answers, each modular unit in above-described embodiment, can be realized using example, in hardware, it can also be by the form of software function module
It realizes, the application is not limited to the combination of the software and hardware of any particular form.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.It is all
Within the spirit and principles in the present invention, any modification made, equivalent replacement, improve etc., it should be included in protection of the invention
Within the scope of.
Claims (8)
1. carrying out the method for frame structure acquisition in a kind of user equipment (UE) of TDD system, wherein including walking as follows
It is rapid:
Receive the identifier i that the first signaling obtains K cell1i2…iK；
Receive the frame structure s that the second signaling obtains the K cell1s2…sK；
Wherein, cell ikFrame structure be sk, the K is greater than the integer equal to 1, and the k is more than or equal to 1 and is less than or equal to K, institute
It states K cell and does not include the cell for sending first signaling and second signaling；
Further include following steps:
Cell is directed in subframe tSignal execute interference eliminate inhibit operation；
Wherein, the subframe t is in the cellFrame structure sq1sq2…sqKIn be downlink subframe, institute
It statesIt is the i1i2…iKSubset.
2. the method according to claim 1, wherein first signaling is high-rise letter
It enables.
3. the method according to claim 1, wherein second signaling is physical layer signaling.
4. carrying out the method for frame structure transmission in a kind of system equipment of TDD system, wherein include the following steps:
Send the identifier i that the first signaling indicates K cell1i2…iK；
Send the frame structure s that the second signaling indicates the K cell1s2…sK；
Wherein, cell ikFrame structure be sk, the K is greater than the integer equal to 1, and the k is more than or equal to 1 and is less than or equal to K, institute
State the transmission cell that K cell does not include first signaling and second signaling；
Cell is directed in subframe tSignal execute interference eliminate inhibit operation；
Wherein, the subframe t is in the cellFrame structure sq1sq2…sqKIn be downlink subframe, institute
It statesIt is the i1i2…iKSubset.
5. according to the method described in claim 4, it is characterized in that, first signaling is high-level signaling.
6. according to the method described in claim 4, it is characterized in that, second signaling is physical layer signaling.
7. a kind of user equipment (UE), which is characterized in that the equipment includes:
First module: the identifier i that the first signaling obtains K cell is received1i2…iK；
Second module: the frame structure s that the second signaling obtains the K cell is received1s2…sK；
Wherein, cell ikFrame structure be sk, the K is greater than the integer equal to 1, and the k is more than or equal to 1 and is less than or equal to K, institute
State the transmission cell that K cell does not include first signaling and second signaling；
Third module: cell is directed in subframe tSignal execute interference eliminate inhibit operation；
Wherein, the subframe t is in the cellFrame structure sq1sq2…sqK
In be downlink subframe, it is describedIt is the i1i2…iKSubset.
8. a kind of system equipment, which is characterized in that the equipment includes:
First module: the identifier i that the first signaling indicates K cell is sent1i2…iK；
Second module: the frame structure s that the second signaling indicates the K cell is sent1s2…sK；
Wherein, cell ikFrame structure be sk, the K is greater than the integer equal to 1, and the k is more than or equal to 1 and is less than or equal to K, institute
State the transmission cell that K cell does not include first signaling and second signaling；
Cell is directed in subframe tSignal execute interference eliminate inhibit operation；
Wherein, the subframe t is in the cellFrame structure sq1sq2…sqKIn be downlink subframe,
It is describedIt is the i1i2…iKSubset.
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| CN103002587A (en) * | 2011-09-09 | 2013-03-27 | 中兴通讯股份有限公司 | Method and device for determining power |
| CN102378252A (en) * | 2011-11-10 | 2012-03-14 | 北京北方烽火科技有限公司 | TD-LTE (Time Division-Long Term Evolution) system-based frequency sweep method and TD-LTE system-based frequency sweep system |
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