CN106341850B - A kind of cell synchronous method and device - Google Patents
A kind of cell synchronous method and device Download PDFInfo
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- CN106341850B CN106341850B CN201510397713.0A CN201510397713A CN106341850B CN 106341850 B CN106341850 B CN 106341850B CN 201510397713 A CN201510397713 A CN 201510397713A CN 106341850 B CN106341850 B CN 106341850B
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- microcell
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0061—Transmission or use of information for re-establishing the radio link of neighbour cell information
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7073—Synchronisation aspects
- H04B1/70735—Code identification
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7073—Synchronisation aspects
- H04B1/7083—Cell search, e.g. using a three-step approach
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The present invention provides a kind of cell synchronous method and device, by same frequency and the very small cell that there is overlapping to cover be divided into a Microcell group, configure cell ID corresponding with the alien frequencies macro base station of Microcell group's overlapping covering for Microcell cell ID in the group of the Microcell；When user terminal receives the adjacent area list information of the resident macro base station broadcast of this user terminal, if it was found that there is cell ID identical with the cell ID of the macro base station in the neighboring cell list, then on the corresponding Microcell frequency point of cell ID, cell synchronization information is searched for using the cell ID of the macro base station；The PSS that Microcell is sent is received, carries out main synchronization using cell ID parsing PSS；When receiving the SSS that Microcell is sent, auxiliary synchronization is carried out using cell ID parsing SSS.With this solution, reduce hand off signaling when user terminal movement, and cell synchronous can be fast implemented, enhance user experience.
Description
Technical field
The present invention relates to field of communication technology, in particular to a kind of cell synchronous method and device.
Background technique
Currently, when user terminal needs to transmit data after movement, needing elder generation with frequent collection cell deployment
It is synchronized for new Microcell, needs to search for primary synchronization signal (Primary Synchronization when synchronous
Signal, PSS) and secondary synchronization signal (Secondary Synchronization Signal, SSS), parsing obtains object respectively
Manage cell group in ID and physical area group number, and then obtain Microcell cell ID, be completed at the same time main synchronization with it is auxiliary synchronous.
When user terminal is frequently moved in each minizone, such implementation, user terminal can be frequent in minizone
Switching synchronous efficiency is reduced, so that the service experience of user can be reduced so as to cause a large amount of network side signaling is generated.
Summary of the invention
In view of this, the application provides a kind of cell synchronous method and device, when frequently being moved with solving user, can generate
A large amount of hand off signaling, and synchronize slow problem.
In order to solve the above technical problems, the technical solution of the application is achieved in that
A kind of cell synchronous method, by same frequency and the very small cell that there is overlapping to cover be divided into Microcell group, by this
The cell ID ID of Microcell is configured in the group of Microcell, cell corresponding with the alien frequencies macro base station of Microcell group's overlapping covering
ID, this method comprises:
User terminal receives the adjacent area list information of the resident macro base station broadcast of this user terminal, obtains neighboring cell list, if
It was found that there is cell ID identical with the cell ID of the macro base station in the neighboring cell list, then the frequency of Microcell is corresponded in cell ID
Cell synchronization information is searched for using the cell ID of the macro base station on point；
The primary synchronization signal PSS that Microcell is sent is received, carries out main synchronization using cell ID parsing PSS；
The secondary synchronization signal SSS that Microcell is sent is received, carries out auxiliary synchronization using cell ID parsing SSS.
A kind of cell synchronous device, by same frequency and the very small cell that there is overlapping to cover be divided into Microcell group, by this
The cell ID ID of Microcell is configured in the group of Microcell, cell corresponding with the alien frequencies macro base station of Microcell group's overlapping covering
ID, the device include: receiving unit and processing unit；
The receiving unit receives the primary synchronization signal PSS of Microcell transmission, makes for receiving adjacent area list information
Main synchronization is carried out with cell ID parsing PSS；The secondary synchronization signal SSS that Microcell is sent is received, is solved using the cell ID
It analyses SSS and carries out auxiliary synchronization；
The processing unit, for receiving the adjacent area of the resident macro base station broadcast of this user terminal when the receiving unit
List information obtains neighboring cell list, if finding to have cell ID identical with the cell ID of the macro base station in the neighboring cell list,
Cell synchronization information is searched for using the cell ID of the macro base station on the frequency point that cell ID corresponds to Microcell.
As can be seen from the above technical solution, in the application in on-premise network, by same frequency and have overlapping cover it is small
Zoning is divided into a Microcell group, configures the Microcell cell ID ID in the group of the Microcell to, Chong Die with Microcell group
The corresponding cell ID of the alien frequencies macro base station of covering；It can directly be carried out using known cell ID when carrying out cell synchronous main same
Step with it is auxiliary synchronous.By technical solution provided by the present application, when being able to use family terminal and being moved in same Microcell group, it is not required to
Carry out cell switching；Reduce hand off signaling when user terminal movement, and cell synchronous can be fast implemented, enhances user
Experience.
Detailed description of the invention
Fig. 1 is cell synchronous flow diagram in the embodiment of the present application；
Fig. 2 is the structural schematic diagram for being applied to the device of above-mentioned technology in the embodiment of the present application.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and examples,
Technical solution of the present invention is described in detail.
In network deployment, by same frequency and the very small cell that there is overlapping to cover be divided into Microcell group, the Microcell
The cell ID (ID) of Microcell configuration in group is cell corresponding with the alien frequencies macro base station of Microcell group's overlapping covering
ID.Here Microcell, which refers to, sends the cell that the lower base station of power is formed.
Overlapping covering in the embodiment of the present application between Microcell is at least between Microcell has overlapping covering two-by-two, i.e.,
In the presence of covering intersection；If Microcell group includes Microcell 1, Microcell 2 and Microcell 3, then it can be Microcell 1 and small
There is overlapping covering between area 2, there is overlapping covering between Microcell 3 and Microcell 2, and between Microcell 1 and Microcell 3 not
It is covered in the presence of overlapping；Alternatively, there is overlapping covering etc. between Microcell 1, Microcell 2 and Microcell 3.
It is different with the Microcell in the group of the Microcell from the frequency of the alien frequencies macro base station of Microcell group's overlapping covering, and should
There are Chong Die coverings with any Microcell in the group of the Microcell for macro base station, i.e., the macro base station is at least and in the group of the Microcell
A Microcell exist overlapping covering.
Overlapping covering in the embodiment of the present application refers to that the range of covering has overlapping.
User terminal in an idle state, resides in macro base station, that is to say, that user terminal can only see macro base at this time
It stands, can't see each Microcell.
When user terminal needs to send or receive data, user needs to find Microcell, and synchronous with the Microcell of discovery,
And then in the Microcell transmitting data.
A Microcell is assigned to by the very small cell that overlapping covering will be present in above-mentioned implementation in the embodiment of the present application
Group in, and the cell ID in the Microcell same Microcell Qun Zhongge be it is identical, therefore, when user terminal the Microcell group
In each Microcell between when moving, the switching for being not required to carry out Microcell can increase so that a large amount of network side signaling will not be generated
Strong user experience effect.
It is described in detail in the embodiment of the present application how to realize cell synchronous with reference to the accompanying drawing.
It is cell synchronous flow diagram in the embodiment of the present application referring to Fig. 1, Fig. 1.Specific steps are as follows:
Step 101, user terminal receives the adjacent area list information of the resident macro base station broadcast of this user terminal, obtains adjacent area
List, however, it is determined that there is cell ID identical with the cell ID of the macro base station in the neighboring cell list, then it is corresponding in cell ID
Cell synchronization information is searched for using the cell ID of the macro base station on the frequency point of Microcell.
When user terminal needs to receive or send data, the adjacent area of the resident macro base station broadcast of this user terminal is started to process
List information obtains neighboring cell list and, by the neighboring cell list, needs to detect in a certain order multiple in existing realization
Adjacent area, it is determined which adjacent area be linked into；And in the embodiment of the present application only need to determine in the neighboring cell list with the presence or absence of with
The identical cell ID of the corresponding cell ID of the macro base station that this user terminal is currently resident, if so, the cell ID that then be used directly
Execute subsequent cell synchronous；Otherwise, the synchronization of cell is carried out according to existing realization.
Except cell ID in adjacent area list information comprising each adjacent Microcell, also comprising frequency corresponding to neighboring community
Point.
According to the mode of micro cell deployment ID in the embodiment of the present application, terminal whether there is and this in discovery neighboring cell list
The identical cell ID of macro base station respective cell ID that user terminal is currently resident, so that it may directly determine to exist Chong Die with macro base station
The Microcell of covering then directly searches and finds this Microcell, without executing multiple adjacent area search and discovery.
User terminal searches for the synchronizing information of known cell ID on some frequency point, than not knowing frequency point and/or cell
The high-efficient more of cell ID are searched in the case where ID.
Step 102, which receives the PSS that Microcell is sent, and is carried out using cell ID parsing PSS main same
Step.
In this step, user terminal carries out main synchronization using the PSS that cell ID parsing receives, and specifically includes:
User terminal using the cell ID value divided by the remainder after 3 as the serial number in the group of physical area, and described in use
The PSS that the corresponding sequence analysis of serial number receives in the group of physical area carries out main synchronization.
For LTE system, 504 unique physical district IDs are shared, for distinguishing different cells.This 504
Physical district ID is first divided into 168 unique physical area group numbers, unique comprising 3 again in each physical area group
Serial number in the group of physical area.Here the purpose being grouped is to guarantee to complete cell discovery and synchronous faster with principle.
Therefore, the serial number 0,1,2 in the group of physical area.
Step 103, which receives the SSS of Microcell transmission, is carried out using cell ID parsing SSS auxiliary same
Step.
In this step, user terminal carries out auxiliary synchronization using the SSS that cell ID parsing receives, and specifically includes:
The cell ID value is rounded downwards resulting numerical value as physical area group number divided by 3 quotient by user terminal, and
Auxiliary synchronization is carried out using the SSS that the corresponding sequence analysis of the physical area group number receives.
The user terminal synchronizes signal search under the premise of step 101, and therefore, the PSS and SSS received is
Cell ID corresponding with the macro base station is identical, and the corresponding micro-base station transmission in Microcell of frequency alien frequencies.
In the embodiment of the present application user terminal carry out main synchronization with it is auxiliary it is synchronous after, also need receive cell common reference letter
Number (CRS), the essence for this user terminal is synchronous, and specific implementation is compared with realization.
A kind of cell synchronous device is also proposed based on same inventive concept, in the embodiment of the present application.It, will when on-premise network
With frequency and the very small cell that there is overlapping to cover be divided into Microcell group, by the Microcell cell ID ID in the group of the Microcell
It is configured to, cell ID corresponding with the alien frequencies macro base station of Microcell group's overlapping covering.Referring to fig. 2, Fig. 2 is the embodiment of the present application
In be applied to above-mentioned technology device structural schematic diagram.The device includes: receiving unit 201 and processing unit 202；
Receiving unit 201 receives the primary synchronization signal PSS of Microcell transmission, uses for receiving adjacent area list information
The cell ID parsing PSS carries out main synchronization；The secondary synchronization signal SSS that Microcell is sent is received, is parsed using the cell ID
SSS carries out auxiliary synchronization；
Processing unit 202, for receiving the adjacent area column of the resident macro base station broadcast of this user terminal when receiving unit 201
Table information obtains neighboring cell list, if finding to have cell ID identical with the cell ID of the macro base station in the neighboring cell list,
Cell ID corresponds to the cell ID search cell synchronization information on the frequency point of Microcell using the macro base station.
Preferably,
Receiving unit 201, when specifically for carrying out main synchronous using cell ID parsing PSS, by the cell ID value
Divided by the remainder after 3 as serial number in the group of physical area, and use the corresponding sequence analysis PSS of serial number in the physical area group
Carry out main synchronization.
Preferably,
Receiving unit 201, when being specifically used for carrying out auxiliary synchronous using cell ID parsing SSS, by the cell ID value
It is rounded resulting numerical value downwards as physical area group number divided by 3 quotient, and uses the corresponding sequence of the physical area group number
It parses SSS and carries out auxiliary synchronization.
Preferably,
Receiving unit 201 is further used for receiving cell common reference signal CRS；It is same that essence is carried out using the CRS received
Step.
The unit of above-described embodiment can integrate in one, can also be deployed separately；It can be merged into a unit, it can also
To be further split into multiple subelements.
In conclusion the application is by on-premise network, by same frequency and the very small cell that there is overlapping to cover be divided into one
A Microcell group, configures the Microcell cell ID ID in the group of the Microcell to, the alien frequencies of covering Chong Die with Microcell group
The corresponding cell ID of macro base station；When carrying out cell synchronous main synchronization and auxiliary same directly can be carried out using known cell ID
Step.By technical solution provided by the present application, when being able to use family terminal and moving in same Microcell group, it is not required to carry out cell
Switching；Reduce hand off signaling when user terminal movement, and cell synchronous can be fast implemented, enhances user experience.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent substitution, improvement and etc. done be should be included within the scope of the present invention.
Claims (8)
1. a kind of cell synchronous method, which is characterized in that by same frequency and have overlapping cover very small cell be divided into one it is small
Qu Qun configures the cell ID ID of Microcell in the group of the Microcell to, the alien frequencies macro base station of covering Chong Die with Microcell group
Corresponding cell ID, this method comprises:
User terminal receives the adjacent area list information of the resident macro base station broadcast of this user terminal, obtains neighboring cell list, if discovery
There is cell ID identical with the cell ID of macro base station that this user terminal is resident in the neighboring cell list, then it is corresponding in cell ID
The cell ID for the macro base station being resident on the frequency point of Microcell using this user terminal searches for cell synchronization information；
The primary synchronization signal PSS that Microcell is sent is received, carries out main synchronization using cell ID parsing PSS；
The secondary synchronization signal SSS that Microcell is sent is received, carries out auxiliary synchronization using cell ID parsing SSS.
2. the method according to claim 1, wherein it is described using the cell ID PSS that receives of parsing into
The main synchronization of row, comprising:
Using the cell ID value divided by the remainder after 3 as serial number in cell group, and it is corresponding using serial number in the cell group
The PSS that sequence analysis receives carries out main synchronization.
3. the method according to claim 1, wherein it is described using the cell ID SSS that receives of parsing into
The auxiliary synchronization of row, comprising:
The cell ID value is rounded downwards resulting numerical value as physical area group number divided by 3 quotient, and uses the physics
The SSS that the corresponding sequence analysis of cell group number receives carries out auxiliary synchronization.
4. method described in any one of -3 according to claim 1, which is characterized in that the method further includes:
When receiving cell common reference signal CRS, it is synchronous that essence is carried out using the CRS received.
5. a kind of cell synchronous device, which is characterized in that by same frequency and have overlapping cover very small cell be divided into one it is small
Qu Qun configures the cell ID ID of Microcell in the group of the Microcell to, the alien frequencies macro base station of covering Chong Die with Microcell group
Corresponding cell ID, the device include: receiving unit and processing unit；
The receiving unit, for receiving adjacent area list information, when the processing unit finds exist and this in the neighboring cell list
After the identical cell ID of cell ID of the resident macro base station of user terminal, if receiving the primary synchronization signal of Microcell transmission
PSS carries out main synchronization using cell ID parsing PSS；If the secondary synchronization signal SSS that Microcell is sent is received, using described
Cell ID parses SSS and carries out auxiliary synchronization；
The processing unit, for receiving the neighboring cell list of the resident macro base station broadcast of this user terminal when the receiving unit
Information obtains neighboring cell list, if finding to exist in the neighboring cell list identical as the cell ID of macro base station that this user terminal is resident
Cell ID, then on the frequency point that cell ID corresponds to Microcell using this user terminal be resident macro base station cell ID search for
Cell synchronization information.
6. device according to claim 5, which is characterized in that
The receiving unit, specifically for using the cell ID parsing PSS carry out main synchronous when, by the cell ID value divided by
Remainder after 3 is carried out as serial number in the group of physical area, and using the corresponding sequence analysis PSS of serial number in the physical area group
Main synchronization.
7. device according to claim 5, which is characterized in that
The receiving unit, be specifically used for using the cell ID parsing SSS carry out it is auxiliary synchronous when, by the cell ID value divided by
3 quotient is rounded downwards resulting numerical value as physical area group number, and uses the corresponding sequence analysis of the physical area group number
SSS carries out auxiliary synchronization.
8. the device according to any one of claim 5-7, which is characterized in that
The receiving unit is further used for receiving cell common reference signal CRS；It is synchronous that essence is carried out using the CRS received.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510397713.0A CN106341850B (en) | 2015-07-08 | 2015-07-08 | A kind of cell synchronous method and device |
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| CN201510397713.0A CN106341850B (en) | 2015-07-08 | 2015-07-08 | A kind of cell synchronous method and device |
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| CN106341850A CN106341850A (en) | 2017-01-18 |
| CN106341850B true CN106341850B (en) | 2019-08-09 |
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| JP7433336B2 (en) * | 2019-10-03 | 2024-02-19 | 株式会社Ｎｔｔドコモ | Terminal, base station, communication system, and communication method |
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| CN101505476A (en) * | 2009-03-12 | 2009-08-12 | 上海无线通信研究中心 | Cellular communication system and cell filtering method thereof |
| US8681730B2 (en) * | 2009-07-09 | 2014-03-25 | Broadcom Corporation | Method and system for using sign based synchronization sequences in a correlation process to reduce correlation complexity in an OFDM system |
| CN103686742A (en) * | 2013-12-25 | 2014-03-26 | 广东省电信规划设计院有限公司 | PCI (Physical Cell Identifier) planning method and device |
| CN103703814A (en) * | 2011-07-28 | 2014-04-02 | 瑞典爱立信有限公司 | Beamforming for cell edge capacity improvement in a heterogeneous network |
| CN103747445A (en) * | 2014-01-27 | 2014-04-23 | 上海大唐移动通信设备有限公司 | Method and device for distributing physical cell identity |
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2015
- 2015-07-08 CN CN201510397713.0A patent/CN106341850B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101505476A (en) * | 2009-03-12 | 2009-08-12 | 上海无线通信研究中心 | Cellular communication system and cell filtering method thereof |
| US8681730B2 (en) * | 2009-07-09 | 2014-03-25 | Broadcom Corporation | Method and system for using sign based synchronization sequences in a correlation process to reduce correlation complexity in an OFDM system |
| CN103703814A (en) * | 2011-07-28 | 2014-04-02 | 瑞典爱立信有限公司 | Beamforming for cell edge capacity improvement in a heterogeneous network |
| CN103686742A (en) * | 2013-12-25 | 2014-03-26 | 广东省电信规划设计院有限公司 | PCI (Physical Cell Identifier) planning method and device |
| CN103747445A (en) * | 2014-01-27 | 2014-04-23 | 上海大唐移动通信设备有限公司 | Method and device for distributing physical cell identity |
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Address after: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee after: CHINA ACADEMY OF INFORMATION AND COMMUNICATIONS Address before: 100191 No. 52 Garden North Road, Beijing, Haidian District Patentee before: CHINA ACADEME OF TELECOMMUNICATION RESEARCH OF MIIT |