CN106341850A - Cell synchronization method and device - Google Patents
Cell synchronization method and device Download PDFInfo
- Publication number
- CN106341850A CN106341850A CN201510397713.0A CN201510397713A CN106341850A CN 106341850 A CN106341850 A CN 106341850A CN 201510397713 A CN201510397713 A CN 201510397713A CN 106341850 A CN106341850 A CN 106341850A
- Authority
- CN
- China
- Prior art keywords
- cell
- microcell
- group
- synchronization
- base station
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
Abstract
The invention provides a cell synchronization method and device. The cell synchronization method is characterized in that same-frequency micro cells with overlapping coverage are divided into a micro cell group, and cell IDs of the micro cells in the micro cell group are configured to be cell ID corresponding to a different-frequency macro base station which has overlapping coverage with the micro cell group. The cell synchronization method comprises the steps that a user terminal receives neighbor cell list information broadcasted by a macro base station at which the user terminal resides, and if the user terminal discovers that a cell ID which is identical to the cell ID of the macro base station exists in the neighbor cell list, cell synchronization information is searched at a micro cell frequency point corresponding to the cell ID by using the cell ID of the macro base station; PSSs (Primary Synchronization Signals) sent by the micro cells are received, and the PSSs are parsed by using the cell ID to carry out primary synchronization; and SSSs (Secondary Synchronization Signals) sent by the micro cells are received, and the SSSs are parsed by using the cell ID to carry out secondary synchronization. Through the scheme provided by the invention, switch signaling of the user terminal in movement is reduced. In addition, the cell synchronization method can realize cell synchronization quickly, and the user experience is enhanced.
Description
Technical field
The present invention relates to communication technical field, particularly to a kind of cell synchronous method and device.
Background technology
At present, in the case of with frequent collection cell deployment, user terminal needs transmission data after movement
When, need first to synchronize for new Microcell, need in synchronization to search for master sync signal (primary
Synchronization signal, pss) and auxiliary synchronous signals (secondary synchronization signal,
Sss), parsing obtains id and physical area group number in the group of physical area respectively, and then obtains Microcell
Cell i d, completes main synchronization and auxiliary synchronization simultaneously.
When user terminal frequently moves in each minizone, such implementation, user terminal can be little
Interval frequently switches, thus leading to produce substantial amounts of network side signaling, reduces synchronous efficiency, thus meeting
Reduce the service experience of user.
Content of the invention
In view of this, the application provides a kind of cell synchronous method and device, is frequently moved with solving user
When, a large amount of hand off signaling can be produced, and synchronous slow problem.
For solving above-mentioned technical problem, the technical scheme of the application is achieved in that
A kind of cell synchronous method, by same frequency and the very small cell that has overlapping covering is divided into a Microcell group,
The cell ID id of Microcell in the group of this Microcell is configured to, the alien frequencies of covering overlapping with this Microcell group is grand
Corresponding cell i d in base station, the method includes:
User terminal receives the adjacent area list information of the resident macro base station broadcast of this user terminal, obtains adjacent area row
Table, if find cell i d identical cell i d having with this macro base station in this Neighboring Cell List, in this cell
Cell synchronization information is searched for using cell i d of described macro base station on the frequency of the corresponding Microcell of id；
Receive the master sync signal pss that Microcell sends, carry out main synchronization using described cell i d parsing pss；
Receive the auxiliary synchronous signals sss that Microcell sends, carry out auxiliary synchronization using described cell i d parsing sss.
A kind of cell synchronous device, by same frequency and the very small cell that has overlapping covering is divided into a Microcell group,
The cell ID id of Microcell in the group of this Microcell is configured to, the alien frequencies of covering overlapping with this Microcell group is grand
Corresponding cell i d in base station, this device includes: receiving unit and processing unit；
Described receiving unit, for receiving adjacent area list information, receives the master sync signal of Microcell transmission
Pss, carries out main synchronization using described cell i d parsing pss；Receive the auxiliary synchronous signals sss that Microcell sends,
Carry out auxiliary synchronization using described cell i d parsing sss；
Described processing unit, for receiving the resident macro base station broadcast of this user terminal when described receiving unit
Adjacent area list information, obtains Neighboring Cell List, if finding cell i d having with this macro base station in this Neighboring Cell List
Identical cell i d, then using cell i d of described macro base station on the frequency of the corresponding Microcell of this cell i d
Search cell synchronization information.
From technical scheme above, in the application in on-premise network, by same frequency and have overlapping covering
Very small cell is divided into a Microcell group, and the Microcell cell ID id in the group of this Microcell is configured to, with
Overlapping corresponding cell i d of alien frequencies macro base station covering of this Microcell group；Can be direct when carrying out cell synchronous
Carry out main synchronization and auxiliary synchronization using known cell i d.The technical scheme being provided by the application, can make
When user terminal moves in same Microcell group, it is not required to carry out cell switching；Decrease user terminal to move
When hand off signaling, and can quickly realize cell synchronous, strengthen Consumer's Experience.
Brief description
Fig. 1 is cell synchronous schematic flow sheet in the embodiment of the present application；
Fig. 2 is the structural representation of the device being applied to above-mentioned technology in the embodiment of the present application.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, below in conjunction with the accompanying drawings simultaneously
For embodiment, technical scheme is described in detail.
In network design, by same frequency and the very small cell that has overlapping covering is divided into a Microcell group,
In the group of this Microcell Microcell configuration cell ID (id) be, overlapping with this Microcell group covering
Corresponding cell i d of alien frequencies macro base station.Here Microcell refers to what the relatively low base station of transmit power was formed
Cell.
In the embodiment of the present application, overlapping covering the between Microcell is at least between Microcell presence overlap two-by-two
Cover, that is, exist to cover and occur simultaneously；As a Microcell group includes Microcell 1, Microcell 2 and Microcell 3,
Can be then between Microcell 1 and Microcell 2, to there is overlapping covering, between Microcell 3 and Microcell 2
There is overlapping covering, and between Microcell 1 and Microcell 3, there is not overlapping covering；Or, Microcell
1st, all there is overlapping covering etc. between Microcell 2 and Microcell 3.
Microcell in the frequency of alien frequencies macro base station of covering overlapping with this Microcell group and this Microcell group is not
With, and this macro base station and the arbitrary Microcell in the group of this Microcell exist overlapping cover, i.e. this grand base
Stand and at least there is overlapping covering with one of this Microcell group Microcell.
There is overlap in the overlapping scope referring to cover that covers in the embodiment of the present application.
User terminal in an idle state, resides in macro base station that is to say, that user terminal now can only
See macro base station, can't see each Microcell.
When user terminal needs transmission or receiving data, user needs to find Microcell, and micro- with find
Cell synchronous, and then in this Microcell transmitting data.
One is assigned to by the very small cell that above-mentioned implementation there will be overlapping covering in the embodiment of the present application
In individual Microcell group, and cell i d in same Microcell Qun Zhongge Microcell is identical, therefore,
When user terminal moves between each Microcell in the group of this Microcell, it is not required to carry out the switching of Microcell,
Thus not producing substantial amounts of network side signaling, Consumer's Experience effect can be strengthened.
Describe in the embodiment of the present application how to realize cell synchronous in detail below in conjunction with the accompanying drawings.
Referring to Fig. 1, Fig. 1 is cell synchronous schematic flow sheet in the embodiment of the present application.Concretely comprise the following steps:
Step 101, user terminal receives the adjacent area list information of the resident macro base station broadcast of this user terminal,
Obtain Neighboring Cell List however, it is determined that there is the cell i d identical cell with this macro base station in this Neighboring Cell List
Id, then searched for little on the frequency of the corresponding Microcell of this cell i d using cell i d of described macro base station
Area's synchronizing information.
When user terminal needs to receive or send data, the resident macro base station of this user terminal of start to process is wide
The adjacent area list information broadcast, obtains Neighboring Cell List, in existing realization, by this Neighboring Cell List, needs
Detect multiple adjacent areas in a certain order, with it is determined that be linked into which adjacent area；And the application is implemented
Only need to determine corresponding with the presence or absence of the macro base station currently resident with this user terminal in this Neighboring Cell List in example
Cell i d identical cell i d, if it is, directly use the follow-up cell synchronous of this cell i d execution；
Otherwise, carry out the synchronization of cell according to existing realization.
Adjacent area list information comprises, outside cell i d of each adjacent Microcell, also comprise neighbor cell
Corresponding frequency.
According to the mode of micro cell deployment id in the embodiment of the present application, terminal is in finding Neighboring Cell List
No exist with currently resident macro base station respective cell id identical cell i d of this user terminal it is possible to
Directly judge the Microcell that there is covering overlapping with macro base station, subsequently directly search and find this Microcell,
Search for and discovery without executing multiple adjacent area.
User terminal searches for the synchronizing information of known cell id on certain frequency, and ratio does not know frequency,
And/or in the case of cell i d search for cell i d efficiency high many.
Step 102, this user terminal receives the pss that Microcell sends, using the parsing of described cell i d
Pss carries out main synchronization.
In this step, user terminal carries out main synchronization using the pss that the parsing of described cell i d receives, specifically
Including:
User terminal using described cell i d value divided by the remainder after 3 as the sequence number in the group of physical area, and make
Carry out main synchronization with the pss that the corresponding sequence analysis of sequence number in the group of described physical area receive.
For lte system, have 504 unique physical area id, for distinguishing different cells.
This 504 physical area id are first divided into 168 unique physical area group numbers, in each physical area
The sequence number in 3 unique physical area groups is comprised again in group.Here the purpose being grouped and principle are to protect
Card completes cell faster and finds and synchronous.
Therefore, the serial number 0,1,2 in the group of physical area.
Step 103, this user terminal receives the sss of Microcell transmission, parses sss using described cell i d
Carry out auxiliary synchronization.
In this step, user terminal carries out auxiliary synchronization using the sss that the parsing of described cell i d receives, specifically
Including:
Described cell i d value is rounded downwards the numerical value of gained as physical area group divided by 3 business by user terminal
Number, and carry out auxiliary synchronization using the sss that group number corresponding sequence analysis in described physical area receive.
This user terminal synchronizes signal search on the premise of step 101, therefore, the pss that receives
It is identical with corresponding cell i d of described macro base station with sss, and the corresponding micro-base station in Microcell of frequency alien frequencies
Send.
In the embodiment of the present application, user terminal, after carrying out main synchronization and auxiliary synchronization, also needs to receive the public ginseng of cell
Examine signal (crs), the essence for this user terminal is synchronous, and specific implementation is compared with realization.
Based on same inventive concept, a kind of cell synchronous device is also proposed in the embodiment of the present application.On-premise network
When, by same frequency and the very small cell that has overlapping covering is divided into a Microcell group, by the group of this Microcell
Microcell cell ID id is configured to, the alien frequencies macro base station corresponding cell that cover overlapping with this Microcell group
id.Referring to Fig. 2, Fig. 2 is the structural representation of the device being applied to above-mentioned technology in the embodiment of the present application.Should
Device includes: receiving unit 201 and processing unit 202；
Receiving unit 201, for receiving adjacent area list information, receives the master sync signal of Microcell transmission
Pss, carries out main synchronization using described cell i d parsing pss；Receive the auxiliary synchronous signals sss that Microcell sends,
Carry out auxiliary synchronization using described cell i d parsing sss；
Processing unit 202, for receiving the resident macro base station broadcast of this user terminal when receiving unit 201
Adjacent area list information, obtains Neighboring Cell List, if finding cell i d having with this macro base station in this Neighboring Cell List
Identical cell i d, then using cell i d of described macro base station on the frequency of the corresponding Microcell of this cell i d
Search cell synchronization information.
It is preferred that
Receiving unit 201, during specifically for carrying out main synchronous using described cell i d parsing pss, will be described
Cell i d value divided by the remainder after 3 as sequence number in the group of physical area, and using sequence in the group of described physical area
Number corresponding sequence analysis pss carries out main synchronization.
It is preferred that
Receiving unit 201, during specifically for carrying out auxiliary synchronous using described cell i d parsing sss, will be described
Cell i d value rounds downwards the numerical value of gained as physical area group number divided by 3 business, and uses described physics
Cell group number corresponding sequence analysis sss carries out auxiliary synchronization.
It is preferred that
Receiving unit 201, is further used for receiving cell common reference signal crs；Using the crs receiving
Carry out essence synchronous.
The unit of above-described embodiment can be integrated in one it is also possible to be deployed separately；One can be merged into
Unit is it is also possible to be further split into multiple subelements.
In sum, the application passes through in on-premise network, by Microcell that is same frequency and having overlapping covering
It is divided into a Microcell group, the Microcell cell ID id in the group of this Microcell is configured to, with this
Overlapping corresponding cell i d of alien frequencies macro base station covering of Microcell group；Can be direct when carrying out cell synchronous
Carry out main synchronization and auxiliary synchronization using known cell i d.The technical scheme being provided by the application, energy
When so that user terminal is moved in same Microcell group, it is not required to carry out cell switching；Decrease user eventually
Hand off signaling when end is mobile, and can quickly realize cell synchronous, strengthen Consumer's Experience.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all this
Within the spirit of invention and principle, any modification, equivalent substitution and improvement done etc., should be included in
Within the scope of protection of the invention.
Claims (8)
1. a kind of cell synchronous method it is characterised in that by same frequency and the Microcell that has overlapping covering divide
For a Microcell group, the cell ID id of Microcell in the group of this Microcell is configured to, with this Microcell group
Overlapping corresponding cell i d of alien frequencies macro base station covering, the method includes:
User terminal receives the adjacent area list information of the resident macro base station broadcast of this user terminal, obtains adjacent area row
Table, if find cell i d identical cell i d having with this macro base station in this Neighboring Cell List, in this cell
Cell synchronization information is searched for using cell i d of described macro base station on the frequency of the corresponding Microcell of id；
Receive the master sync signal pss that Microcell sends, carry out main synchronization using described cell i d parsing pss；
Receive the auxiliary synchronous signals sss that Microcell sends, carry out auxiliary synchronization using described cell i d parsing sss.
2. method according to claim 1 is it is characterised in that described parsed using described cell i d
The pss receiving carries out main synchronization, comprising:
Using described cell i d value divided by the remainder after 3 as sequence number in little district's groups, and using in described little district's groups
The pss that the corresponding sequence analysis of sequence number receive carries out main synchronization.
3. method according to claim 1 is it is characterised in that described parsed using described cell i d
The sss receiving carries out auxiliary synchronization, comprising:
Described cell i d value is rounded downwards the numerical value of gained as physical area group number divided by 3 business, and makes
Carry out auxiliary synchronization with the sss that group number corresponding sequence analysis in described physical area receive.
4. the method according to any one in claim 1-3 is it is characterised in that methods described enters one
Step includes:
When receiving cell common reference signal crs, carry out essence using the crs receiving synchronous.
5. a kind of cell synchronous device it is characterised in that by same frequency and the Microcell that has overlapping covering divide
For a Microcell group, the cell ID id of Microcell in the group of this Microcell is configured to, with this Microcell group
Overlapping corresponding cell i d of alien frequencies macro base station covering, this device includes: receiving unit and processing unit；
Described receiving unit, for receiving adjacent area list information, receives the master sync signal of Microcell transmission
Pss, carries out main synchronization using described cell i d parsing pss；Receive the auxiliary synchronous signals sss that Microcell sends,
Carry out auxiliary synchronization using described cell i d parsing sss；
Described processing unit, for receiving the resident macro base station broadcast of this user terminal when described receiving unit
Adjacent area list information, obtains Neighboring Cell List, if finding cell i d having with this macro base station in this Neighboring Cell List
Identical cell i d, then using cell i d of described macro base station on the frequency of the corresponding Microcell of this cell i d
Search cell synchronization information.
6. device according to claim 5 it is characterised in that
Described receiving unit, during specifically for carrying out main synchronous using described cell i d parsing pss, will be described
Cell i d value divided by the remainder after 3 as sequence number in the group of physical area, and using sequence in the group of described physical area
Number corresponding sequence analysis pss carries out main synchronization.
7. device according to claim 5 it is characterised in that
Described receiving unit, during specifically for carrying out auxiliary synchronous using described cell i d parsing sss, will be described
Cell i d value rounds downwards the numerical value of gained as physical area group number divided by 3 business, and uses described physics
Cell group number corresponding sequence analysis sss carries out auxiliary synchronization.
8. the device according to any one in claim 5-7 it is characterised in that
Described receiving unit, is further used for receiving cell common reference signal crs；Using the crs receiving
Carry out essence synchronous.
Priority Applications (1)
| 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 |
Applications Claiming Priority (1)
| 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106341850A true CN106341850A (en) | 2017-01-18 |
| CN106341850B CN106341850B (en) | 2019-08-09 |
Family
ID=57825967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510397713.0A Active CN106341850B (en) | 2015-07-08 | 2015-07-08 | A kind of cell synchronous method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106341850B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114467336A (en) * | 2019-10-03 | 2022-05-10 | 株式会社Ntt都科摩 | Terminal and base station device |
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 |
| 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 |
-
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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114467336A (en) * | 2019-10-03 | 2022-05-10 | 株式会社Ntt都科摩 | Terminal and base station device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106341850B (en) | 2019-08-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105191426B (en) | Communication system | |
| CN109076544A (en) | Method and apparatus for the synchronization in wireless communication system | |
| CN101365223B (en) | Method and apparatus for nearby region measurement, nearby region selection in long term evolution system | |
| RU2690023C1 (en) | D2d synchronization method, user equipment and serving cell | |
| CN104412660B (en) | Device and method for the cell information instruction in wireless network | |
| CN105409301B (en) | LTE synchronous method and relevant device and system | |
| CN102438294A (en) | Method for accessing M2M (machine-to-machine) terminal to network and M2M communication system | |
| CN104158619A (en) | LTE (Long Term Evolution) signal shielding method and system based on CRS (Central Reservation System) | |
| CN103947236A (en) | Cell identifier allocation method, base station, maintenance server, and mobile communication system | |
| KR20200017711A (en) | Method And Apparatus for Synchronizing 5G Relay System | |
| CN107733829A (en) | A kind of method, equipment for sending and detecting synchronizing signal | |
| CN105917603A (en) | CSI-RS based cell discovery signal | |
| CN104753560A (en) | Narrow-band interference resisting method, eNodeB (evolved Node B)and communication system | |
| CN110896555B (en) | Message processing method and device | |
| CN104936264B (en) | A kind of method and apparatus of transmission and the detection of cell ID | |
| CN107734633A (en) | A kind of method and device of synchronous signal transmission | |
| CN102625439B (en) | Method and equipment for carrying out synchronization | |
| CN103634800A (en) | Public information demodulation based mobile communication common-frequency reuse method | |
| CN106341850B (en) | A kind of cell synchronous method and device | |
| TWI494002B (en) | Systems and methods for network entry management, and computer program products thereof | |
| CN104244316A (en) | Discovery signal detecting method and equipment thereof | |
| CN103874045A (en) | Method and device for indicating and determining home cell of small cell | |
| CN101686082A (en) | Downlink synchronizing method and terminal | |
| CN103781170B (en) | Signal sends and device identification method and equipment | |
| CN101686532B (en) | Initial cell search method, system and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
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 |
|
| CP03 | Change of name, title or address |