CN105992286A - District synchronization method when LTE terminal switches districts and LTE terminal - Google Patents
District synchronization method when LTE terminal switches districts and LTE terminal Download PDFInfo
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- CN105992286A CN105992286A CN201510053940.1A CN201510053940A CN105992286A CN 105992286 A CN105992286 A CN 105992286A CN 201510053940 A CN201510053940 A CN 201510053940A CN 105992286 A CN105992286 A CN 105992286A
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Abstract
The present invention discloses a district synchronization method when a LTE terminal switches districts and a LTE terminal. The method comprises: performing periodic adjacent region detection of districts, and obtaining the downlink synchronization information of districts; when receiving the reassortment message of districts switching, obtaining the downlink synchronization information of a target district according to a switching target district ID; performing downlink synchronization of the target district, and switching to the target district; receiving the physics broadcast channel (PBCH) of the target district, and analyzing the account synchronization information of the target district obtained by a main system information block (MIB); and completing the frame number synchronization regulation. The synchronization rate of switching districts through the LTE terminal is effectively improved, and the user experience is greatly improved.
Description
Technical field
The present invention relates to wireless communication technology, particularly relate to synchronized cells during a kind of LTE terminal switching cell
Method and LTE terminal.
Background technology
Switching is an important radio resource management function, is the exclusive function of cellular system and key
Feature, the motion of mobile station and the change of neighbouring environment, signal all can be caused with barrier change and interference
Situation forms decline, and this is the main cause starting switching.Switching be calling during process the most key
Process, it is in order to ensure that Radio Resource switches, at handover between cells, same in same cells
The seriality converted in base station and between different base station.
Switching when, if subscriber equipment (User equipment is called for short UE) target to be linked into is little
District, it is necessary to first carry out a series of synchronizing process.Terminal is needed not affect currently in former community before switching
In the case of community receives, calculate the down-going synchronous obtained with Target cell and receive the physics of Target cell
Broadcast channel (Physical Broadcast Channel is called for short PBCH), resolves non-primary system information block
(Master Information, Block are called for short MIB) obtains the synchronizing informations such as frame number.By above-mentioned feelings
Condition understands, loaded down with trivial details handling process and data processing amount big defect when traditional method exists switching.
Summary of the invention
The invention aims to solve deficiencies of the prior art, it is provided that one can simplify
Handling process, the method for synchronized cells when improving the LTE terminal switching cell of switch speed.
For achieving the above object, on the one hand, synchronize when the invention provides a kind of LTE terminal switching cell
The method of community, the method comprises the following steps:
Community is carried out the detection of periodic adjacent area, it is thus achieved that cell downlink synchronizing information；Receive community switching
Reallocation message time, according to switching target small area ID obtain Target cell down-going synchronous information；Carry out mesh
The down-going synchronous of mark community, is switched to Target cell；Receive Target cell Physical Broadcast Channel PBCH, and
Resolve non-primary system information block MIB and obtain the frame number synchronization information of Target cell；Complete frame number synchronization to adjust.
Preferably, community is carried out the detection of periodic adjacent area, it is thus achieved that cell downlink synchronizing information step, bag
Include acquisition community gain information；When receiving the reallocation message of community switching, obtain according to switching target small area ID
Obtain the gain information of Target cell；The described Target cell that is switched to includes carrying out the Gain tuning of Target cell.
On the other hand, present invention also offers a kind of LTE terminal, including:
Cell detection unit, for carrying out the detection of periodic adjacent area to community, it is thus achieved that cell downlink synchronizes
Information；Acquiring unit, during for receiving the reallocation message of community switching, obtains according to switching target small area ID
Obtain the down-going synchronous information of Target cell；Switch unit, for carrying out the down-going synchronous of Target cell, cuts
Change to Target cell；Resolution unit, is used for receiving Target cell Physical Broadcast Channel PBCH, and resolves master
System information block MIB is wanted to obtain the frame number synchronization information of Target cell；Adjustment unit, has been used for frame number
Synchronization control.
Preferably, cell detection unit is specifically for obtaining community gain information；Acquiring unit, is receiving
During the reallocation message that community switches, obtain the gain information of Target cell according to switching target small area ID；Institute
State switch unit and be additionally operable to carry out the Gain tuning of Target cell.
The present invention utilize switching before lasting detection to neighbor cell, safeguard the down-going synchronous of neighbor cell
Information, eliminates prior art and obtains the process of Target cell synchronizing information when switching, be switched to mesh
After mark community, by receiving Physical Broadcast Channel PBCH and resolving non-primary system information block MIB acquisition also
Adjust Target cell frame number, simplify the handling process of switching, decrease process data volume, shorten and cut
Change time delay.
Accompanying drawing explanation
Synchronized cells method flow during a kind of LTE terminal switching cell that Fig. 1 provides for the embodiment of the present invention
Figure；
A kind of LTE terminal structural representation that Fig. 2 provides for the embodiment of the present invention.
Detailed description of the invention
For making what the technical scheme of the embodiment of the present invention and advantage expressed to become apparent from, below by accompanying drawing and
Embodiment, is described in further detail technical scheme.
During a kind of LTE terminal switching cell that the present invention provides, the method for the new community of Fast synchronization, mainly solves
Determined the simplification to handoff procedure and shorten handoff delay.The method is carried out by continual before switching
Adjacent area is detected, thus ensures to obtain up-to-date down-going synchronous and gain information in time when switching；Root during switching
Down-going synchronous and the gain information that Target cell ID safeguards is obtained according to the switching target small area ID of network configuration,
Realize the function that Target cell synchronizes, there is simple, quick and that data processing amount is little advantage.
The stream of synchronized cells method during a kind of LTE terminal switching cell that Fig. 1 provides for the embodiment of the present invention
Cheng Tu.As it is shown in figure 1, the method comprises the following steps:
Step 101, LTE terminal receive the message of cell detection.
Step 102, after LTE terminal receives the message of cell detection, calculate cell detection time point.
Step 103, LTE terminal carry out cell detection.
Step 104, LTE terminal obtain cell synchronous deviation and gain information, and keep and update.If
LTE terminal receives the message (step 201) that the switching that base station sends heavily is joined, then flow process jumps to step
202；Otherwise proceed to step 105.
Step 105, LTE terminal update the time point of cell detection, are then return to process step 103.
Step 103 is formed to step 105 and is periodically detected circulation.Specifically, cell detection is by continual
Carrying out, down-going synchronous and reception gain that adjacent area detection obtains carry out keeping and updating according to community ID.
Step 201, receive the message heavily joined of switching.Specifically, terminal receives the switching that base station sends and heavily joins
Request.
Step 202, obtain according to the switching target small area ID of network configuration that Target cell ID safeguards descending
Synchronizing information and gain information.Specifically, nearest adjacent little in LTE terminal automatic screening distance objective community
District ID, obtains its down-going synchronous information safeguarded by neighbor cell ID.
Preferably, LTE terminal carries out the detection of periodic adjacent area to community, it is thus achieved that cell downlink synchronizing information
Step, including obtaining community gain information；LTE terminal disappears receiving heavily the joining of community switching that base station sends
During breath, obtain the gain information of Target cell according to switching target small area ID and carry out the increasing of Target cell
Benefit adjusts.
Step 203, LTE terminal carry out the down-going synchronous of Target cell, are switched to Target cell.
Step 204, LTE terminal receive Target cell Physical Broadcast Channel PBCH and resolve Major Systems letter
Breath module MIB obtains the frame number synchronization information of Target cell.
Step 205, LTE terminal carry out frame number synchronization process.
Step 206, LTE terminal complete the down-going synchronous of Target cell.
During the LTE terminal switching cell that the embodiment of the present invention provides, synchronized cells method is right before utilizing switching
The lasting detection of neighbor cell, safeguards the down-going synchronous information of neighbor cell, saves before switching is initiated and mesh
The process of mark community re-synchronization；Meanwhile, obtain the down-going synchronous information of Target cell, and, cutting
After changing to Target cell, by receiving Physical Broadcast Channel PBCH and resolving non-primary system information block MIB
Obtain and adjust Target cell frame number, simplify the handling process of switching, decrease process data volume, contracting
Short handover delay.
A kind of LTE terminal structural representation that Fig. 2 provides for the embodiment of the present invention.As in figure 2 it is shown, should
Terminal includes: cell detection unit 21, acquiring unit 22, switch unit 23, resolution unit 24 and tune
Whole unit 25.
Cell detection unit 21 is for carrying out the detection of periodic adjacent area to community, it is thus achieved that cell downlink synchronizes
Information.Specifically, cell detection unit 21 receives the request of cell detection, at cell detection unit 21
After receiving the request of cell detection, calculate time point and the cycle of cell detection, process cell detection
Request, it is thus achieved that cell synchronous deviation information, storage cell testing result also keeps updating.Preferably, little
District's detector unit 21 is additionally operable to obtain community gain information.
The reallocation message of the community switching that acquiring unit 22 sends for receiving base station, sends when receiving base station
The reallocation message of community switching time, obtain Target cell according to the switching target small area ID of network configuration
Down-going synchronous and gain information.Specifically, receiving when heavily the joining request of community switching that base station sends,
The synchronizing information of the switching cell ID coupling community according to network configuration.Preferably, acquiring unit 22 is also
For when receiving the reallocation message of the community switching that base station sends, obtaining mesh according to switching target small area ID
The gain information of mark community.
Switch unit 23, for carrying out the down-going synchronous of Target cell, is switched to Target cell.Preferably,
Switch unit 23 is additionally operable to carry out the Gain tuning of Target cell.
Resolution unit 24 is used for receiving Target cell Physical Broadcast Channel PBCH, and resolves non-primary system information
Block MIB obtains the frame number synchronization information of Target cell.
Adjustment unit 25 has been used for frame number synchronization and has adjusted.
The LTE terminal that the embodiment of the present invention provides utilizes the lasting detection before switching to neighbor cell, dimension
Protect the down-going synchronous information of neighbor cell, save the process with Target cell re-synchronization before switching is initiated；
Meanwhile, obtain the down-going synchronous information of Target cell, and, after being switched to Target cell, pass through
Receive Physical Broadcast Channel PBCH and resolve non-primary system information block MIB and obtain and adjust Target cell frame
Number, simplify the handling process of switching, decrease process data volume, shorten handover delay.
Professional should further appreciate that, describes in conjunction with the embodiments described herein
The unit of each example and algorithm steps, it is possible to come with electronic hardware, computer software or the combination of the two
Realize, in order to clearly demonstrate the interchangeability of hardware and software, the most according to function
Generally describe composition and the step of each example.These functions are come with hardware or software mode actually
Perform, depend on application-specific and the design constraint of technical scheme.Professional and technical personnel can be to often
Individual specifically should being used for uses different methods to realize described function, but this realization it is not considered that
Beyond the scope of this invention.
The method described in conjunction with the embodiments described herein or the step of algorithm can use hardware, process
The software module that device performs, or the combination of the two implements.Software module can be placed in random access memory
(RAM), internal memory, read only memory (ROM), electrically programmable ROM, electrically erasable ROM,
Other form any well known in depositor, hard disk, moveable magnetic disc, CD-ROM or technical field
Storage medium in.
Above-described detailed description of the invention, is carried out the purpose of the present invention, technical scheme and beneficial effect
Further describe, be it should be understood that the foregoing is only the present invention detailed description of the invention and
, the protection domain being not intended to limit the present invention, all within the spirit and principles in the present invention, done
Any modification, equivalent substitution and improvement etc., should be included within the scope of the present invention.
Claims (6)
1. the method for synchronized cells during a LTE terminal switching cell, it is characterised in that described method bag
Include:
Community is carried out the detection of periodic adjacent area, it is thus achieved that cell downlink synchronizing information；
When receiving the reallocation message of community switching, obtain the descending of Target cell according to switching target small area ID
Synchronizing information；
Carry out the down-going synchronous of Target cell, be switched to Target cell；
Receive Target cell Physical Broadcast Channel PBCH, and resolve non-primary system information block MIB acquisition target
The frame number synchronization information of community；
Complete frame number synchronization to adjust.
The method of synchronized cells during LTE terminal switching cell the most according to claim 1, its feature
It is, described community is carried out periodic adjacent area detecting step particularly as follows: to neighbor cell before Qie Huan
Lasting detection, safeguard the down-going synchronous information of neighbor cell.
The method of synchronized cells during LTE terminal switching cell the most according to claim 1, its feature
It is, described community is carried out the detection of periodic adjacent area, it is thus achieved that cell downlink synchronizing information step, bag
Include acquisition community gain information；
When receiving the reallocation message of community switching, obtain the gain of Target cell according to switching target small area ID
Information；
The described Target cell that is switched to includes carrying out the Gain tuning of Target cell.
The method of synchronized cells during LTE terminal switching cell the most according to claim 1, its feature
It is, described periodic adjacent area detecting step that community is carried out, further comprising the steps of:
Receive cell detection message；
Calculate the time point of cell detection；
Carry out cell detection；
Obtain cell synchronous deviation and gain information.
5. a LTE terminal, it is characterised in that described terminal includes:
Cell detection unit, for carrying out the detection of periodic adjacent area to community, it is thus achieved that cell downlink synchronizes
Information；
Acquiring unit, during for receiving the reallocation message of community switching, obtains according to switching target small area ID
The down-going synchronous information of Target cell；
Switch unit, for carrying out the down-going synchronous of Target cell, is switched to Target cell；
Resolution unit, is used for receiving Target cell Physical Broadcast Channel PBCH, and resolves non-primary system information
Block MIB obtains the frame number synchronization information of Target cell；
Adjustment unit, has been used for frame number synchronization and has adjusted.
LTE terminal the most according to claim 5, it is characterised in that cell detection unit, is used for
Community is carried out the detection of periodic adjacent area, it is thus achieved that cell downlink synchronizing information, including obtaining community gain
Information；
Acquiring unit, during for receiving the reallocation message of community switching, obtains according to switching target small area ID
The gain information of Target cell；
Described switch unit is additionally operable to carry out the Gain tuning of Target cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510053940.1A CN105992286A (en) | 2015-02-02 | 2015-02-02 | District synchronization method when LTE terminal switches districts and LTE terminal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510053940.1A CN105992286A (en) | 2015-02-02 | 2015-02-02 | District synchronization method when LTE terminal switches districts and LTE terminal |
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| CN201510053940.1A Pending CN105992286A (en) | 2015-02-02 | 2015-02-02 | District synchronization method when LTE terminal switches districts and LTE terminal |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1570695A1 (en) * | 2002-12-13 | 2005-09-07 | Da Tang Mobile Communications Equipment Co., Ltd. | A hand-over method in mobile communication system |
| CN1735271A (en) * | 2005-06-30 | 2006-02-15 | 凯明信息科技股份有限公司 | Hard handoff method and device and TD-SCDMA system using same method and device |
| CN101835224A (en) * | 2009-03-09 | 2010-09-15 | 大唐移动通信设备有限公司 | Switching method and terminal of HSPA (High Speed Packet Access) channel |
| US20140092871A1 (en) * | 2006-10-30 | 2014-04-03 | Interdigital Technology Corporation | Method and apparatus for implementing tracking area update and cell reselection in a long term evolution system |
-
2015
- 2015-02-02 CN CN201510053940.1A patent/CN105992286A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1570695A1 (en) * | 2002-12-13 | 2005-09-07 | Da Tang Mobile Communications Equipment Co., Ltd. | A hand-over method in mobile communication system |
| CN1735271A (en) * | 2005-06-30 | 2006-02-15 | 凯明信息科技股份有限公司 | Hard handoff method and device and TD-SCDMA system using same method and device |
| US20140092871A1 (en) * | 2006-10-30 | 2014-04-03 | Interdigital Technology Corporation | Method and apparatus for implementing tracking area update and cell reselection in a long term evolution system |
| CN101835224A (en) * | 2009-03-09 | 2010-09-15 | 大唐移动通信设备有限公司 | Switching method and terminal of HSPA (High Speed Packet Access) channel |
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Application publication date: 20161005 |