Indicate and determine the method and apparatus of the home cell of cell
Technical field
The present invention relates to wireless communication field, more particularly to a kind of method of home cell for indicating and determining cell and
Equipment.
Background technology
With the increase of evolution and the data service of technology, cell(small cell)Concept propose and by height
Concern.Small cell generally have less coverage and relatively low transmission power, by the way that small cell are deployed in
Apart from user's closer proximity, such as indoor and hot spot region, the data rate of user can be lifted.
According to current research, small cell type is broadly divided into two kinds, the small cell of dependent work and
The small cell of autonomous working, respectively as illustrated in figs. 1A and ib.
The small cell of autonomous working have the complete function of a cell in existing system, support terminal in small
Accessed in cell and resident, terminal is moved in small cell coverages from macro base station to be needed by handoff procedure.It is non-only
The small cell of vertical work do not possess complete cell function in existing system, do not support the access of terminal and are resident.For example,
Be moved to dependent work small cell coverages in terminal, not through existing handoff procedure, but by its
Chain of command connection (system broadcasts, RRC signaling etc.) still remain at macro base station, only data surface connection (up-downgoing business datum,
Dispatch etc.) switch to small cell, i.e. carrying separation.Therefore, for dependent work small cell, it is necessary to have
The macrocell of determination(Macro cell)It is managed and configured.Simplify in view of actual deployment scene and equipment, generally
Small cell are managed by the Macro cell uniquely determined, and the ownership that the Macro cell are alternatively referred to as small cell is small
Area.Therefore, when carrying out small cell selections, it is necessary to ensure that the resident Macro cell of terminal are returning for the small cell
Belong to cell, or can at least be established with the small cell and be connected/management.Therefore, terminal is reported measuring, or grand base
, it is necessary to know small cell home cell information when station switches over decision-making.
On the other hand, generally, the small cell of dependent work cell ID(ID)By its ownership
Macro cell are distributed unitedly and management, i.e. Macro cell can pass through any small of its administration of cell ID unique identifications
cell.But different Macro cell are independently to be its small cell distribution cells ID.Therefore, under different Macro cell
Small cell are likely to configure same cell ID.Especially in smallcell dense deployments, different Macro cell it
Interior reuse identical cell ID possibility is bigger.Therefore, small cell cell ID needs to strengthen, and will solution never
The collision problem brought with Macro cell separate configurations smallcell cell ID.
Include home base stations(Local eNB)And macro base station(Macro eNB)Heterogeneous network deployment scenario such as Fig. 2 institutes
Show.Wherein Macro eNB provide grand covering, and Local eNB provide focus covering in grand coverage.
For the network architecture shown in Fig. 2, if according to current mechanism, terminal(User Equipment, UE)In Macro
When being moved in cell coverages, the handover operation between Macro cell and Local cell may be constantly performed.In order to keep away
Exempting from frequent switching causes data-transmission interruptions, and a kind of mode is exactly to allow UE to polymerize Local eNB and Macro eNB simultaneously
Resource, but wireless heterogeneous networks(RRC)Connection is maintained under Macro eNB, and the resource of Local base stations is only used for data biography
Defeated, i.e. chain of command user plane isolation technics, also referred to as carrying separates.
Sequence used in synchronizing signal has close relationship with physical-layer cell ID.LTE supports that 504 physical layers are small
Area ID, these physical-layer cells ID are divided into 168 groups, referred to as physical-layer cell ID groups, and each group includes 3 physical-layer cells
ID.So, a physical-layer cell ID can is by representing the numerals of physical-layer cell ID groups(Scope is 0~167), and
Represent the numeral of the physical-layer cell ID in the ID groups of the physical-layer cell(Scope is 0 ~ 2)Carry out unique definition, i.e.,
To sum up, prior art can not solve the problems, such as the home cell for how indicating small cell.
The content of the invention
The embodiment of the present invention provides a kind of method and apparatus for the home cell for indicating and determining cell, for solving such as
The problem of home cell of what instruction cell.
A kind of method for the home cell for indicating cell, this method include:
The cell ID for the macrocell that home base stations are belonged to according to the cell ID and the cell of cell, generation
The home cell indication signal of the cell;
Home base stations send the home cell indication signal to terminal, to notify cell described in terminal to be belonged to grand
Cell.
A kind of method for the home cell for determining cell, this method include:
The home cell indication signal for the cell that terminal detection home base stations are sent, the home cell of the cell refers to
It is the cell ID generation for the macrocell that home base stations are belonged to according to the cell ID and the cell of cell to show signal
Signal;
Terminal determines the macrocell that the cell is belonged to according to the home cell indication signal detected.
A kind of home base stations, the home base stations include:
Signal generation unit, the cell of the macrocell belonged to for the cell ID according to cell and the cell
Mark, generate the home cell indication signal of the cell;
Signal transmitting unit, for sending the home cell indication signal to terminal, to notify cell described in terminal
The macrocell belonged to.
A kind of terminal, the terminal include:
Detecting signal unit, the home cell indication signal of the cell for detecting home base stations transmission are described slight
The home cell indication signal in area is the macrocell that home base stations are belonged to according to the cell ID and the cell of cell
Cell ID generation signal;
Cell determining unit, for according to the home cell indication signal detected, determining that the cell is returned
The macrocell of category.
In scheme provided in an embodiment of the present invention, home base stations are belonged to according to the cell ID and the cell of cell
Macrocell cell ID, generate the home cell indication signal of the cell, and the home cell of generation is sent to terminal
Indication signal, the home cell indication signal for the cell that terminal detection home base stations are sent, according to the home cell detected
Indication signal determines the macrocell that cell is belonged to, it is seen then that home base stations are by sending home cell instruction letter in this programme
Number, terminal is determined the macrocell that cell belonged to according to home cell indication signal, how to be indicated so as to solve
The problem of home cell of cell.
Brief description of the drawings
Fig. 1 a are the cell schematic diagram of dependent work in the prior art;
Fig. 1 b are the cell schematic diagram to work independently in the prior art;
Fig. 2 is the heterogeneous network deployment scenario schematic diagram for including Local eNB and Macro eNB in the prior art;
Fig. 3 is FDD system synchronizing signal time-domain position schematic diagram in the prior art;
Fig. 4 is TDD system synchronizing signal time-domain position schematic diagram in the prior art;
Fig. 5 is method flow schematic diagram provided in an embodiment of the present invention;
Fig. 6 is another method schematic flow sheet provided in an embodiment of the present invention;
Fig. 7 is TDD system double synchronous signal structure time-domain position schematic diagram in the embodiment of the present invention;
Fig. 8 is architecture of base station schematic diagram provided in an embodiment of the present invention;
Fig. 9 is terminal structure schematic diagram provided in an embodiment of the present invention.
Embodiment
In LTE system, master sync signal(Primary Synchronized Signal, PSS)Use Zadoff-Chu sequences
Row, the main synchronizing sequence that three length are 62 is shared, it is with three physical-layer cellsThere are mapping relations one by one, main synchronous letter
Number sequence is only mapped on 62 subcarriers among 72 subcarriers, and 5 tone reservations at edge are protection interval.It is main same
Signal sequence is walked per 5ms transmission primarieses, sequence used in former and later two fields is identical in a radio frames.
Master sync signal sequence is produced by the Zadoff-Chu sequence of frequency domain, and one shares 3 master sync signal sequences, specifically
Equation below one:
Formula one:
The root sequence sequence number u of its Zadoff-Chu sequence used is as shown in table 1 below.
Table 1
Master sync signal sequence is carried out to resource unit according to frame structure(Resource Element, RE)Mapping.UE
End is it is not assumed that descending master sync signal sequence uses identical antenna port with any one downlink reference signal, it is not assumed that any
Used day when used antenna port transmits with other any master sync signal sequences when master sync signal sequence is transmitted
Line end mouth is identical(It is not assumed that master sync signal sequence is transmitted on some or certain several antenna ports).
Sequence d (n) to RE mapping relations are as follows:
ak,l=d (n),N=0 ..., 61;
Wherein,For Physical Resource Block corresponding to the bandwidth of cell(PRB)Number,Carried for the son in each PRB
Wave number mesh.
For frame structure 1, last OFDM of master sync signal sequence mapping to time slot 0 and time slot 10
(Orthogonal Frequency Division Multiplexing, OFDM)On symbol, as shown in Figure 3.
For frame structure 2, in the 3rd OFDM symbol of master sync signal sequence mapping to subframe 1 and 6, as shown in Figure 4.
The resource unit (k, l) that equation below two defines is reserved, is not used in the transmission of master sync signal sequence;
Formula two: N=-5, -4 ..., -1,62,63 ..., 66;
Wherein,For the number of the OFDM symbol in a PRB.
Auxiliary synchronous signals(Secondary Synchronization Signal, SSS)Sequence d (0) ..., d (61) is
The sequence connected into after the intertexture for the binary sequence that two length are 31.This catenation sequence is indicated by master sync signal sequence
Scramble sequence scrambled.
The two length are that the merging mode of 31 sequence in subframe 0 and subframe 5 is different, according to this different conjunction
And mode, it is possible to determine the timing original position of radio frames.Specific auxiliary synchronous signals sequence is defined by equation below three:
Formula three:
The m of wherein 0≤n≤30.0And m1By physical-layer cell ID groupsDetermine, i.e.,:
m0=m ' mod 31
Specific output result is shown in form 6.11.2.1-1 in 211 specifications.
The two sequencesWithIt is m-sequenceTwo different cyclically shifted sequences, i.e.,:
Wherein0≤i≤30, it is defined as:
Primary condition is x (0)=0, x (1)=0, x (2)=0, x (3)=0, x (4)=1.
Two scramble sequence c0And c (n)1(n) determined by master sync signal sequence, be m-sequenceTwo different follow
Ring shift sequence:
WhereinIt is in physical-layer cell ID groupsIn physical-layer cell ID.
0≤i≤30, it is defined as follows:
Primary condition is x (0)=0, x (1)=0, x (2)=0, x (3)=0, x (4)=1.
Scramble sequenceWithIt is m-sequenceCyclic shift, i.e.,:
Wherein m0And m1Form 6.11.2.1-1 has regulation in 211 specifications,0≤i≤30, it is defined as:
Primary condition is x (0)=0, x (1)=0, x (2)=0, x (3)=0, x (4)=1.
The running time-frequency resource position of auxiliary synchronous signals sequence depends on system frame structure type, for frame structure 1 and frame structure 2
In the subframe of preceding field, auxiliary synchronous signals sequence, auxiliary synchronous letter are sent using with master sync signal sequence identical antenna port
The mapping relations of number sequence d (n) to resource are as follows:
ak,l=d (n),N=0 ..., 61;
The resource unit (k, l) that equation below four defines retains, and without the transmission of auxiliary synchronous signals sequence;
Formula four:N=-5, -4 ..., -1,62,63 ..., 66;
In order to solve the problems, such as how to indicate the home cell of cell, the embodiment of the present invention provides a kind of small cell of instruction
Home cell method.
Referring to Fig. 5, the method for the home cell of instruction cell provided in an embodiment of the present invention, comprise the following steps:
Step 50:The cell mark for the macrocell that home base stations are belonged to according to the cell ID and the cell of cell
Know, generate the home cell indication signal of the cell;
Step 51:Home base stations send the home cell indication signal of generation to terminal, to notify the terminal cell institute
The macrocell of ownership.
As a kind of embodiment, the specific implementation of step 50 can be as follows:
The cell ID for the macrocell that home base stations are belonged to according to cell, or belonged to according to cell grand small
The cell ID in area and the cell ID of the cell, generate the first main indication signal;
The cell ID for the macrocell that home base stations are belonged to according to cell, or belonged to according to cell grand small
The cell ID in area and the cell ID of the cell, generate the first auxiliary indication signal;
The cell ID for the macrocell that home base stations are belonged to according to cell and the cell ID of the cell, generation the
Two auxiliary indication signals;
Home base stations regard the first of generation the main indication signal, the first auxiliary indication signal and the second auxiliary indication signal as this
The home cell indication signal of cell.
Specifically, the cell ID for the macrocell that above-mentioned home base stations are belonged to according to cell, generates the first main instruction
Signal, specific implementation can be as follows:
Identified in group in the cell ID for the macrocell that home base stations are belonged to according to cellAccording to drilling for a long time
Enter(LTE)Master sync signal generating mode specified in system protocol generates the first main indication signal, specifically may refer to formula
One.
Specifically, the cell of the cell ID for the macrocell that above-mentioned home base stations are belonged to according to cell and the cell
Mark, the first main indication signal is generated, specific implementation can be as follows:
Identified in group in the cell ID for the macrocell that home base stations are belonged to according to cellAccording to LTE system
Master sync signal generating mode specified in agreement generates master sync signal, specifically may refer to formula one;
Home base stations are used with being identified in the group in the cell ID of the cellRelated scramble sequence, to generation
Master sync signal scrambled, using the signal obtained after scrambling as the first main indication signal, such as, obtained after scrambling
One main indication signal ak,l=d1(n)d2(n), wherein d1(n) it is according to master sync signal generation side specified in LTE system agreement
The master sync signal of formula generation, d2(n) it is with being identified in the group in the cell ID of the cellRelated scramble sequence,
d2(n) can be specifically formula one limit sequence;Or, use the cell ID with the cellRelated scramble sequence,
The master sync signal of generation is scrambled, using the signal obtained after scrambling as the first main indication signal, such as, after scrambling
The the first main indication signal a arrivedk,l=d1(n) b (n), wherein d1(n) it is according to master sync signal specified in LTE system agreement
The master sync signal of generating mode generation, b (n) is the scramble sequence related to the cell ID of the cell, b (n) generation
Mode is as follows:
B (n)=(x1(n+Nc)+x2(n+Nc))mod2;
x1(n+31)=(x1(n+3)+x1(n))mod2;
x2(n+31)=(x2(n+3)+x2(n+2)+x2(n+1)+x2(n))mod2;
Wherein, Nc=1600, the initialization mode of first m-sequence is:x1(0)=1, x1(n)=0, n=1,2 ...,
30;Second m-sequence initialization mode be:Wherein cinitFor the cell ID of cell.
Specifically, the cell ID for the macrocell that above-mentioned home base stations are belonged to according to cell, generates the first auxiliary instruction
Signal, specific implementation can be as follows:
The cell ID for the macrocell that home base stations are belonged to according to cell, according to auxiliary specified in LTE system agreement
Synchronizing signal generating mode generates the first auxiliary indication signal.
Specifically, the cell ID for the macrocell that above-mentioned home base stations are belonged to according to cell and the cell is small
Area identifies, and generates the first auxiliary indication signal, specific implementation can be as follows:
Home base stations generate the first auxiliary indication signal according to auxiliary synchronous signals generating mode specified in LTE system agreement,
Specifically it may refer to formula three;And
The s sequences used when generating the first auxiliary indication signal(S i.e. in formula three0Sequence and s1Sequence)With z sequences
(Z i.e. in formula three1Sequence)Group mark in the cell ID of the macrocell belonged to the cellIt is related;Use
C0Identified in group in the cell ID for the macrocell that sequence is belonged to the cellOr the cell ID of the cell
In group in identifyCorrelation, the c used1Group internal standard in the cell ID for the macrocell that sequence is belonged to the cell
KnowOr identified in the group in the cell ID of the cellIt is related.
Specifically, the cell of the cell ID for the macrocell that above-mentioned home base stations are belonged to according to cell and the cell
Mark, the second auxiliary indication signal is generated, specific implementation can be as follows:
Home base stations generate the second auxiliary indication signal according to equation below
Wherein, s0、c0、c1、z1For the sequence specified in LTE system agreement used in auxiliary synchronous signals generating mode,
Correlated series i.e. in formula three;And
s0Group mark in the cell ID of the macrocell belonged to the cellOr the cell ID of the cell
In group markCorrelation, z1Group mark in the cell ID of the macrocell belonged to the cellOr this is slight
Group mark in the cell ID in areaIt is related;c0Group internal standard in the cell ID of the macrocell belonged to the cell
KnowOr identified in the group in the cell ID of the cellCorrelation, c1The cell of the macrocell belonged to the cell
Identified in group in markOr identified in the group in the cell ID of the cellIt is related.
Preferably, home base stations can also be according to the cell ID for the macrocell that cell is belonged to, or according to slight
The cell ID for the macrocell that area is belonged to and the cell ID of the cell, the second main indication signal is generated, and second is led
Indication signal is sent to terminal as the home cell indication signal of the cell.Here, belonged to according to cell grand small
The specific generation method that the cell ID in area generates the second main indication signal is:Home base stations are belonged to grand small according to cell
Identified in group in the cell ID in areaAccording to master sync signal generating mode generation second specified in LTE system agreement
Main indication signal, it specifically may refer to formula one.The cell ID of the macrocell belonged to according to cell and the cell
Cell ID, the method for the second main indication signal of generation can be:The macrocell that home base stations are belonged to according to cell it is small
Identified in group in area's markAccording to the main synchronous letter of master sync signal generating mode generation specified in LTE system agreement
Number;Using being identified in the group in the cell ID with cellRelated scramble sequence, or use the cell mark with cell
The scramble sequence of sensible pass, the master sync signal of generation is scrambled, using the signal obtained after scrambling as the second main instruction
Signal.
As another embodiment, the specific implementation of step 50 can be as follows:
The cell ID for the macrocell that home base stations are belonged to according to cell, main indication signal and auxiliary instruction are generated respectively
Signal;Specifically, identified in group in the cell ID for the macrocell that home base stations are belonged to according to cellAccording to LTE
Master sync signal generating mode specified in system protocol generates main indication signal, specifically may refer to formula one;According to slight
Group mark in the cell ID for the macrocell that area is belonged toGenerated according to auxiliary synchronous signals specified in LTE system agreement
Mode generates auxiliary indication signal, specifically may refer to formula three;
Home base stations use the scrambler sequence related to the cell ID of the cell, respectively to the main indication signal of generation
Scrambled with auxiliary indication signal;For example the main indication signal after scrambling is PSSMacrob(n), the auxiliary main indication signal after scrambling
For SSSMacrob(n), wherein PSSMacroFor the main indication signal of generation, SSSMacroFor the auxiliary indication signal of generation, b (n) be with
The related scrambler sequence of the cell ID of the cell.
For home base stations by the main indication signal after scrambling and the auxiliary indication signal after scrambling, the ownership as the cell is small
Area's indication signal.
In step 51, when home base stations send the home cell indication signal of cell, using meeting in following condition
The running time-frequency resource of at least one condition:
For time division duplex(TDD)System, it is located at subframe 0, subframe 1, subframe 5 and subframe 6 in time domain;
Positioned at multiple Physical Resource Block centered on direct current carrier on frequency domain(PRB);
It is located at the exclusive pilot signal of cell that 1 port is not present in subframe in time domain(CRS), channel condition information with reference to letter
Number(CSI-RS)And demodulation reference mark(DMRS)OFDM(OFDM)Symbol.
Referring to Fig. 6, the embodiment of the present invention provides a kind of method for the home cell for determining cell, comprises the following steps:
Step 60:The home cell indication signal for the cell that terminal detection home base stations are sent, the ownership of the cell
Cell indication signal is the cell ID for the macrocell that home base stations are belonged to according to the cell ID and the cell of cell
The signal of generation;
Step 61:Terminal determines what the cell was belonged to according to the home cell indication signal of the cell detected
Macrocell.
As a kind of embodiment, the home cell indication signal of cell includes the first main indication signal, the first auxiliary finger
Show signal and the second auxiliary indication signal;Wherein:
First main indication signal is the cell ID for the macrocell that home base stations are belonged to according to cell, or according to small
What the cell ID for the macrocell that cell is belonged to and the cell ID of the cell generated;
First auxiliary indication signal is the cell ID for the macrocell that home base stations are belonged to according to cell, or according to small
What the cell ID for the macrocell that cell is belonged to and the cell ID of the cell generated;
Second auxiliary indication signal is the cell ID and the small cell for the macrocell that home base stations are belonged to according to cell
Cell ID generation.
Further, the first main indication signal is the macrocell that home base stations are belonged to according to cell as follows
Cell ID generation:
Identified in group in the cell ID for the macrocell that home base stations are belonged to according to cellAccording to LTE system
Master sync signal generating mode specified in agreement generates the first main indication signal.
Further, the first main indication signal is the macrocell that home base stations are belonged to according to cell as follows
Cell ID and the cell cell ID generation:
Identified in group in the cell ID for the macrocell that home base stations are belonged to according to cellAccording to LTE system
Master sync signal generating mode specified in agreement generates master sync signal;
Home base stations are used with being identified in the group in the cell ID of the cellRelated scramble sequence, or make
With the scramble sequence related to the cell ID of the cell, the master sync signal of generation is scrambled, will be obtained after scrambling
Signal as the first main indication signal.
Further, the first auxiliary indication signal is the macrocell that home base stations are belonged to according to cell as follows
Cell ID generation:
The cell ID for the macrocell that home base stations are belonged to according to cell, according to auxiliary specified in LTE system agreement
Synchronizing signal generating mode generates the first auxiliary indication signal.
Further, the first auxiliary indication signal is the macrocell that home base stations are belonged to according to cell as follows
Cell ID and the cell cell ID generate:
Home base stations generate the first auxiliary indication signal according to auxiliary synchronous signals generating mode specified in LTE system agreement;
And
S sequences and z sequences and this used when generating the first auxiliary indication signal states the macrocell that cell is belonged to
Group mark in cell IDIt is related;The c used0In the cell ID for the macrocell that sequence is belonged to the cell
Identified in groupOr identified in the group in the cell ID of the cellCorrelation, the c used1Sequence is returned with the cell
Identified in group in the cell ID of the macrocell of categoryOr identified in the group in the cell ID of the cellIt is related.
Further, the second auxiliary indication signal is the macrocell that home base stations are belonged to according to cell as follows
Cell ID and the cell cell ID generate:
Home base stations generate the second auxiliary indication signal according to equation below
Wherein, s0、c0、c1、z1For the sequence specified in LTE system agreement used in auxiliary synchronous signals generating mode,
And
s0Group mark in the cell ID of the macrocell belonged to the cellOr the cell ID of the cell
In group markCorrelation, z1Group mark in the cell ID of the macrocell belonged to the cellOr this is slight
Group mark in the cell ID in areaIt is related;c0Group internal standard in the cell ID of the macrocell belonged to the cell
KnowOr identified in the group in the cell ID of the cellCorrelation, c1The cell of the macrocell belonged to the cell
Identified in group in markOr identified in the group in the cell ID of the cellIt is related.
Further, the home cell indication signal of cell also includes the second main indication signal, the second main indication signal
It is the cell ID for the macrocell that home base stations are belonged to according to the cell, or the macrocell belonged to according to cell
Cell ID and the cell cell ID generate.
Home cell indication signal as another embodiment cell includes main indication signal and auxiliary indication signal;
Wherein, main indication signal and auxiliary indication signal are that home base stations generate as follows;
The cell ID for the macrocell that home base stations are belonged to according to cell, main indication signal and auxiliary instruction are generated respectively
Signal;
Home base stations use the scrambler sequence related to the cell ID of the cell, respectively to the main indication signal
Scrambled with the auxiliary indication signal.
In step 60, terminal can detect small cell on the running time-frequency resource of at least one condition in meeting following condition
Home cell indication signal:
For TDD system, it is located at subframe 0, subframe 1, subframe 5 and subframe 6 in time domain;
Positioned at multiple PRB centered on direct current carrier on frequency domain;
It is located at CRS, CSI-RS and DMRS that 1 port is not present in subframe OFDM symbol in time domain.
The specific detection method of home cell indication signal is illustrated below:
As a kind of embodiment, in step 60, the home cell instruction for the cell that terminal detection home base stations are sent
Signal, specific implementation can be as follows:
The terminal detection master sync signal of cell, cell auxiliary synchronous signals and home cell indication signal in the
One main indication signal, obtain the group mark in the cell ID of cellIdentified in group in the cell ID of cellIdentified with the group in the cell ID of macrocell
Terminal in the group in the cell ID of macrocell according to identifyingOr in the cell ID according to cell
Identified in groupIdentified with the group in the cell ID of macrocellDetect the first auxiliary finger in the indication signal of home cell
Show signal, the group mark in the cell ID for obtaining macrocell from the first auxiliary indication signal
Terminal identifies according to the group in the cell ID of the cell of acquisitionIn group in the cell ID of cell
MarkGroup mark in the cell ID of macrocellIdentified with the group in the cell ID of macrocellDetection
The second auxiliary indication signal in the indication signal of home cell.
Accordingly, terminal determines the home cell of cell according to the home cell indication signal detected in step 61,
It is implemented as:Terminal according to the cell ID of the macrocell for determining to obtain to the testing result of the second auxiliary indication signal with it is slight
The incidence relation of the cell ID in area, and determine that the home cell of cell is that have the grand small of incidence relation with the cell
Area.Specifically:A, the cell ID of all macrocells of acquisition is divided into one group as first group, by all small cells of acquisition
Cell ID be divided into one be used as second group;B, the group mark in the cell ID of a macrocell is selected from first groupIdentified with the group in the cell ID of macrocellIn the cell ID that a cell is selected from second group
Group markIdentified with the group in the cell ID of cellUsing each mark selected to the second auxiliary instruction
Signal is detected, if detecting successfully, it is determined that between the cell ID of the macrocell selected and the cell ID of cell
With incidence relation, otherwise, detection next time, return to step B, until the macrocell mark in first group and second group are carried out
In small cell ID selected get.
Specifically, master sync signal, the auxiliary synchronous signals of cell and the returning for cell of above-mentioned terminal detection cell
Belong to the first main indication signal in cell indication signal, obtain the group mark in the cell ID of cellCell
Identified in group in cell IDIdentified with the group in the cell ID of macrocellIt is implemented as follows:
Terminal detects master sync signal according to master sync signal detection mode specified in LTE system agreement, from detecting
Master sync signal in obtain unknown cell cell ID in group in identify
Terminal is assisted according to the resource location relation of master sync signal set in advance and auxiliary synchronous signals according to LTE system
Auxiliary synchronous signals detection mode specified in view detects auxiliary synchronous signals;
If terminal detects auxiliary synchronous signals, it is determined that the master sync signal detected for cell master sync signal,
The auxiliary synchronous signals detected are the auxiliary synchronous signals of cell, and the cell ID of cell is obtained from the auxiliary synchronous signals
In group markIt will be identified in group in the cell ID of the unknown cellIt is defined as the cell ID of cell
In group in identifyAccording to synchronizing signal set in advance and the resource location relation of home cell indication signal, detection is returned
Belong to the first main indication signal in cell indication signal, in the cell ID for obtaining macrocell from the first main indication signal
Identified in group
If terminal is not detected by auxiliary synchronous signals, it is determined that the master sync signal detected is the first main indication signal, really
Identified in group in the cell ID of the fixed unknown cellTo be identified in the group in the cell ID of macrocellAnd root
According to the resource location relation of synchronizing signal set in advance and home cell indication signal, detect cell master sync signal and
Auxiliary synchronous signals, in the group in the cell ID for obtaining cell from the master sync signal and auxiliary synchronous signals of cell respectively
MarkWith a group mark
Preferably, terminal, in the first main indication signal in detecting home cell indication signal, also detection detection belongs to
The second main indication signal in cell indication signal, the group in the cell ID for obtaining macrocell from the second main indication signal
Interior mark
As another embodiment, the home cell instruction for the cell that terminal detection home base stations are sent in step 60
Signal, specific implementation can be as follows:
Terminal detects the master sync signal of cell and auxiliary synchronization according to synchronization signal detection mode specified in LTE system
Signal, obtain the cell ID of cell;
Terminal according to the resource location relation of synchronizing signal set in advance and home cell indication signal, using with it is slight
Main indication signal and auxiliary indication signal in the related scrambler sequence detection home cell indication signal of the cell ID in area, are obtained grand
Identified in group in the cell ID of cellWith the group mark in the cell ID of macrocell
Accordingly, in step 61, terminal determines the ownership of cell according to the home cell indication signal detected
Cell, it is implemented as:Terminal determine the home cell of cell be detect to obtain using the cell ID of the cell it is grand
Macrocell corresponding to the cell ID of cell.
With reference to specific embodiment, the present invention will be described:
Embodiment one:
Base station side:
Step 1:The cell ID for the macrocell that home base stations are belonged to according to the cell ID and cell of cell,
Generate the home cell indication signal of cell;Specifically, the home cell indication signal of generation includes following two parts:
Part I signal includes the first main indication signalWith the first auxiliary indication signal
Generating mode can compared with the generation method of master sync signal in technology, and with cell institute
In the cell ID of the macrocell of ownershipIt is related;Can also enter on the basis of existing master sync signal generation method
One step scrambles, for example, ak,l=d1(n)d2(n), d1(n)d2(n) in the cell ID of the macrocell belonged to respectively with cell
'sIn the cell ID of cellIt is related.Or ak,l=d1(n) b (n), d1(n) b (n) respectively with small cell
In the cell ID of the macrocell belonged toThe cell ID of cell is related.
Generating mode compared with technology, the relation between the generation of its sequence and cell ID is as shown in summer table 2:
Table 2
Explanation:Combination 1 and 2 in upper table 2 can further reduce the retrieval number of subsequent terminal, be easy to terminal quickly to look for
To cell and the corresponding relation of macrocell.
It is preferred that Part I signal can be mapped in preceding field.
Part II signal includes the second auxiliary indication signal
'sGenerating mode is:
Wherein, s, c, z generating mode is compared with technology, wherein, the corresponding relation between sequence generation and cell ID is such as
Shown in table 3 below:
Table 3
Recommend ground, Part II signal is mapped in rear field.
Part II signal can also include the second main indication signalWhereinGenerating mode co-occurrence
Have a technology, and with the cell ID of the macrocell of cell ownership, or with the cell ID of the macrocell of cell ownership and
The cell ID of cell is related.
Step 2:Home base stations send the home cell indication signal of generation to terminal, to notify that terminal cell is returned
The macrocell of category;
The resource mapping method of the home cell indication signal of cell is as follows:PSSMacroAnd SSSMacroIt is mapped in one
In the resource determined in radio frames, it is preferred that PSSMacroAnd SSSMacroIt is mapped in the resource for meeting following partly or entirely condition
On:
For TDD system, using subframe 0,1,5 and 6.
Use resource near centered on direct current carrier.For example, 6 PRB. centered on direct current carrier
In the absence of CRS, CSI-RS and DMRS of 1 port OFDM symbol.For conventional CP, recommend OFDM symbol 1,2,
3,8 }, for extending CP, OFDM symbol { 1,2 } is recommended.
Example 1:For FDD system;
WithIndividual OFDM symbol and penultimate OFDM symbol last in time slot K are mapped in,(If there is)WithIt is mapped in individual OFDM symbol last and penultimate OFDM symbols in time slot K+n
Number, K=1-9, n≤10.Recommend ground, n ≠ 10.As shown in Figure 7.
Example 2:For TDD system;
WithIt is mapped in second OFDM symbol of subframe 1 and the penultimate OFDM symbols of subframe 0
Number;(If there is)WithIt is mapped in second OFDM symbol of subframe 6 and the penultimate of subframe 5
OFDM symbol.
End side:
Step 1:The home cell indication signal for the cell that terminal detection home base stations are sent, returns according to what is detected
Belong to cell indication signal, determine the macrocell that cell is belonged to;It is specific as follows:
Master sync signal is detected according to prior art and obtained
Terminal according toAuxiliary synchronous signals are detected with the auxiliary synchronous signals relative position of protocol conventions;
When terminal is capable of detecting when auxiliary synchronous signals according to prior art, terminal can determine front and rear field, CP length
With cellThe cell ID of complete cell can be obtained.And according to the synchronizing signal and ownership of protocol conventions
The relative position detection indication signal of cell indication signalIndication signal can detect or pass through according to prior art
The cell ID of cell is gone after disturbing, then detected using prior art.By detecting indication signal, terminal can obtain macrocell
Cell ID in
When terminal can not detect auxiliary synchronous signals according to prior art, the master sync signal that terminal thinks to have detected is
Indication signalI.e. and home base stationThe indication signal of binding.Further according to the synchronizing signal of protocol conventions and
The relative position of home cell indication signal, detect synchronizing signal.And then obtain before and after field, CP length and cell cell
Mark.
In cell ID of the terminal according to macrocellOr in the cell ID of cellIt is small with macrocell
In area's markTo indication signalAfter descrambling, in the cell ID for detecting macrocellIt is i.e. available
The cell ID of complete macrocell.
Terminal detects indication signal according to the cell ID of obtained macrocell and the cell ID of cellAnd then the incidence relation of the cell ID of macrocell and the cell ID of cell is determined according to testing result.
Embodiment two:
Base station side:
Step 1:The cell ID for the macrocell that home base stations are belonged to according to the cell ID and cell of cell,
Generate the home cell indication signal of cell;Specifically:
The cell ID for the macrocell that home base stations are belonged to according to cell generates main indication signal PSSMacroWith auxiliary finger
Show signal SSSMacro, and the PSS using scrambler sequence b (n) to generationMacroAnd SSSMacroScrambled respectively, b (n) with it is slight
The cell ID in area is related.
Step 2:Home base stations send the home cell indication signal of generation to terminal, to notify that terminal cell is returned
The macrocell of category;
The resource impact of home cell indication signal is as follows:
PSSMacroAnd SSSMacroIt can be mapped in respectively in embodiment oneWithIn the resource of mapping;Or
Person, PSSMacroAnd SSSMacroIt is mapped in respectively in embodiment oneWithIn the resource of mapping;Or PSSMacro
It is mapped in embodiment oneWithIn the resource of mapping, SSSMacroIt is mapped in embodiment oneWithIn the resource of mapping.
End side:
Step 1:The home cell indication signal for the cell that terminal detection home base stations are sent;Returned according to what is detected
Category cell indication signal determines the macrocell that cell is belonged to.Specifically:
Terminal detects synchronizing signal according to prior art and obtains the cell ID of cell;
Terminal determines home cell indication signal according to the relative position relation of synchronizing signal and home cell indication signal
The resource location at place, scrambler sequence is further determined according to the cell ID of cell, disturbed on the resource location according to this
Code sequence pair home cell indication signal is descrambled;
Terminal carries out sequence correlation to the sequence after descrambling successively, and then determines the cell for the macrocell that cell is belonged to
Mark.
Referring to Fig. 8, the embodiment of the present invention provides a kind of home base stations, and the home base stations include:
Signal generation unit 80, the macrocell belonged to for the cell ID according to cell and the cell it is small
Area identifies, and generates the home cell indication signal of the cell;
Signal transmitting unit 81, it is slight described in terminal to notify for sending the home cell indication signal to terminal
The macrocell that area is belonged to.
Further, the signal generation unit 80 includes:
First generation unit 801, for the cell ID of the macrocell belonged to according to cell, or according to small cell
The cell ID of the cell ID of the macrocell belonged to and the cell, generate the first main indication signal;
Second generation unit 802, for the cell ID of the macrocell belonged to according to cell, or according to small cell
The cell ID of the cell ID of the macrocell belonged to and the cell, generate the first auxiliary indication signal;
3rd generation unit 803, for the cell ID of macrocell that is belonged to according to cell and the small cell
Cell ID, generate the second auxiliary indication signal;
Determining unit 804, for the first of generation the main indication signal, the first auxiliary indication signal and the second auxiliary instruction to be believed
Number, the home cell indication signal as the cell.
Further, the first signal generation unit 801 is used for:
Identified in group in the cell ID of the macrocell belonged to according to cellAccording to Long Term Evolution LTE system
Master sync signal generating mode specified in agreement generates the first main indication signal.
Further, the first signal generation unit 801 is used for:
Identified in group in the cell ID of the macrocell belonged to according to cellAccording to being advised in LTE system agreement
Fixed master sync signal generating mode generation master sync signal;
Using with being identified in the group in the cell ID of the cellRelated scramble sequence, or use with it is described
The related scramble sequence of the cell ID of cell, is scrambled, the signal that will be obtained after scrambling to the master sync signal of generation
As the first main indication signal.
Further, second generation unit 802 is used for:
The cell ID of the macrocell belonged to according to cell, according to auxiliary synchronous signals specified in LTE system agreement
Generating mode generates the first auxiliary indication signal.
Further, second generation unit 802 is used for:
The first auxiliary indication signal is generated according to auxiliary synchronous signals generating mode specified in LTE system agreement;
The macrocell that the s sequences and z sequences used when generating the first auxiliary indication signal is belonged to the cell
Group mark in cell IDIt is related;The c used0In the cell ID for the macrocell that sequence is belonged to the cell
Group in identifyOr identified in the group in the cell ID of the cellCorrelation, the c used1Sequence with it is described slight
Identified in group in the cell ID for the macrocell that area is belonged toOr identified in the group in the cell ID of the cellIt is related.
Further, the 3rd generation unit 803 is used for:
The second auxiliary indication signal is generated according to equation below
Wherein, s0、c0、c1、z1For the sequence specified in LTE system agreement used in auxiliary synchronous signals generating mode,
And
s0Group mark in the cell ID of the macrocell belonged to the cellOr the cell of the cell
Group mark in markCorrelation, z1Group mark in the cell ID of the macrocell belonged to the cellOr
Group mark in the cell ID of the cellIt is related;c0The cell ID of the macrocell belonged to the cell
In group in identifyOr identified in the group in the cell ID of the cellCorrelation, c1Belonged to the cell
Macrocell cell ID in group in identifyOr identified in the group in the cell ID of the cellIt is related.
Further, the signal generation unit 80 also includes:
4th generation unit 805, for the cell ID of the macrocell belonged to according to the cell, or according to institute
The cell ID for the macrocell that cell is belonged to and the cell ID of the cell are stated, generates the second main indication signal;
The determining unit 804 is additionally operable to:Letter is indicated using the second main indication signal as the home cell of the cell
Number.
Further, the signal generation unit 80 includes:
5th generation unit 806, for the cell ID of the macrocell belonged to according to cell, main instruction is generated respectively
Signal and auxiliary indication signal;
Scrambling unit 807, for using the scrambler sequence related to the cell ID of the cell, respectively to the master
Indication signal and the auxiliary indication signal are scrambled;By the main indication signal after scrambling and the auxiliary instruction after scrambling
Signal, the home cell indication signal as the cell.
Further, when the signal transmitting unit 81 sends the home cell indication signal of the cell, using full
The running time-frequency resource of at least one condition in the following condition of foot:
For TDD system, it is located at subframe 0, subframe 1, subframe 5 and subframe 6 in time domain;
Positioned at multiple Physical Resource Block PRB centered on direct current carrier on frequency domain;
It is located at the exclusive pilot signal CRS of cell, the channel state information reference signals that 1 port is not present in subframe in time domain
CSI-RS and demodulation reference character D MRS orthogonal frequency division multiplex OFDM symbol.
Referring to Fig. 9, the embodiment of the present invention provides a kind of terminal, and the terminal includes:
Detecting signal unit 90, the home cell indication signal of the cell for detecting home base stations transmission are described small
It is grand small that the home cell indication signal of cell is that home base stations are belonged to according to the cell ID and the cell of cell
The signal of the cell ID generation in area;
Cell determining unit 91, for according to the home cell indication signal detected, determining the cell institute
The macrocell of ownership.
Further, the home cell indication signal that the detecting signal unit 90 detects include the first main indication signal,
First auxiliary indication signal and the second auxiliary indication signal;
Wherein, the first main indication signal is the cell ID for the macrocell that home base stations are belonged to according to cell, or
What the cell ID of the macrocell belonged to according to cell and the cell ID of the cell generated;
First auxiliary indication signal is the cell ID for the macrocell that home base stations are belonged to according to cell, or according to small
What the cell ID for the macrocell that cell is belonged to and the cell ID of the cell generated;
Second auxiliary indication signal is the cell ID of the macrocell that home base stations are belonged to according to cell and described slight
The cell ID generation in area.
Further, the first main indication signal that the detecting signal unit 90 detects be home base stations as follows
The cell ID generation of the macrocell belonged to according to cell:
Identified in group in the cell ID for the macrocell that home base stations are belonged to according to cellAccording to drilling for a long time
Enter master sync signal generating mode specified in LTE system agreement and generate the first main indication signal.
Further, the first main indication signal that the detecting signal unit 90 detects be home base stations as follows
What the cell ID of the macrocell belonged to according to cell and the cell ID of the cell generated:
Identified in group in the cell ID for the macrocell that home base stations are belonged to according to cellAccording to LTE system
Master sync signal generating mode specified in agreement generates master sync signal;
Home base stations are used with being identified in the group in the cell ID of the cellRelated scramble sequence, or make
With the scramble sequence related to the cell ID of the cell, the master sync signal of generation is scrambled, will be obtained after scrambling
The signal arrived is as the first main indication signal.
Further, the first auxiliary indication signal that the detecting signal unit 90 detects be home base stations as follows
The cell ID generation of the macrocell belonged to according to cell:
The cell ID for the macrocell that home base stations are belonged to according to cellAccording to specified in LTE system agreement
Auxiliary synchronous signals generating mode generates the first auxiliary indication signal.
Further, the first auxiliary indication signal that the detecting signal unit 90 detects be home base stations as follows
What the cell ID of the macrocell belonged to according to cell and the cell ID of the cell generated:
Home base stations generate the first auxiliary indication signal according to auxiliary synchronous signals generating mode specified in LTE system agreement;
The macrocell that the s sequences and z sequences used when generating the first auxiliary indication signal is belonged to the cell
Group mark in cell IDIt is related;The c used0In the cell ID for the macrocell that sequence is belonged to the cell
Group in identifyOr identified in the group in the cell ID of the cellCorrelation, the c used1Sequence with it is described slight
Identified in group in the cell ID for the macrocell that area is belonged toOr identified in the group in the cell ID of the cellIt is related.
Further, the second auxiliary indication signal that the detecting signal unit 90 detects be home base stations as follows
What the cell ID of the macrocell belonged to according to cell and the cell ID of the cell generated:
Home base stations generate the second auxiliary indication signal according to equation below
Wherein, s0、c0、c1、z1For the sequence specified in LTE system agreement used in auxiliary synchronous signals generating mode,
And
s0Group mark in the cell ID of the macrocell belonged to the cellOr the cell of the cell
Group mark in markCorrelation, z1Group mark in the cell ID of the macrocell belonged to the cellOr
Group mark in the cell ID of the cellIt is related;c0The cell ID of the macrocell belonged to the cell
In group in identifyOr identified in the group in the cell ID of the cellCorrelation, c1Belonged to the cell
Macrocell cell ID in group in identifyOr identified in the group in the cell ID of the cellIt is related.
Further, the home cell indication signal for the cell that the detecting signal unit 90 detects also includes the
Two main indication signals, the second main indication signal are the cell IDs for the macrocell that home base stations are belonged to according to the cell,
Or the macrocell belonged to according to the cell cell ID and the cell cell ID generation.
Further, the home cell indication signal for the cell that the detecting signal unit 90 detects includes main finger
Show signal and auxiliary indication signal;Wherein, main indication signal and auxiliary indication signal are that home base stations generate as follows;
The cell ID for the macrocell that home base stations are belonged to according to cell, main indication signal and auxiliary instruction are generated respectively
Signal;
Home base stations use the scrambler sequence related to the cell ID of the cell, respectively to the main indication signal
Scrambled with the auxiliary indication signal.
Further, the detecting signal unit 90 is on the running time-frequency resource of at least one condition in meeting following condition
Detect the home cell indication signal of cell:
For TDD system, it is located at subframe 0, subframe 1, subframe 5 and subframe 6 in time domain;
Positioned at multiple Physical Resource Block PRB centered on direct current carrier on frequency domain;
It is located at the exclusive pilot signal CRS of cell, the channel state information reference signals that 1 port is not present in subframe in time domain
CSI-RS and demodulation reference character D MRS orthogonal frequency division multiplex OFDM symbol.
It should be noted that the sequence related to cell ID in the present invention, refers to what is generated according to the cell ID
Sequence.
To sum up, beneficial effects of the present invention include:
In scheme provided in an embodiment of the present invention, home base stations are belonged to according to the cell ID and the cell of cell
Macrocell cell ID, generate the home cell indication signal of the cell, and the home cell of generation is sent to terminal
Indication signal, the home cell indication signal for the cell that terminal detection home base stations are sent, according to the home cell detected
Indication signal determines the macrocell that cell is belonged to, it is seen then that home base stations are by sending home cell instruction letter in this programme
Number, terminal is determined the macrocell that cell belonged to according to home cell indication signal, how to be indicated so as to solve
The problem of home cell of cell, after the problem is resolved, same cells ID cell is used for different cells
ID collision problems are also resolved, because the cell using same cells ID can be distinguished by home cell.
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.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation
Property concept, then can make other change and modification to these embodiments.So appended claims be intended to be construed to include it is excellent
Select embodiment and fall into having altered and changing for the scope of the invention.
Obviously, those skilled in the art can carry out 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.