CN103546930B - A kind of cell switching method that is suitable for TD-LTE public network group system - Google Patents
A kind of cell switching method that is suitable for TD-LTE public network group system Download PDFInfo
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- CN103546930B CN103546930B CN201310522464.4A CN201310522464A CN103546930B CN 103546930 B CN103546930 B CN 103546930B CN 201310522464 A CN201310522464 A CN 201310522464A CN 103546930 B CN103546930 B CN 103546930B
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Abstract
The invention discloses a kind of method of switching for wireless network group. The group being made up of multiple movement stations carries out handover constantly, first an interim little network of movement station composition that utilizes the thresholding setting in advance that needs are switched, and in this little network, select a bridge group user, its Bridge user has been equipped with two cover transceivers, allow to communicate at the network of two different frequencies, be the information that other group user forwarding source base stations in interim little network send by bridge group user simultaneously. Realize source access station to the switching between target access station by bridge group user, after bridge group user target approach network, other group user is by the negotiation between bridge group user and target access station, target approach access station in order. By this scheme, the present invention can reduce the collision in group's handoff procedure significantly, thereby has reduced the time that service to mobile stations interrupts, and can with existing wireless network compatibility.
Description
Technical field
The present invention relates to wireless communication field, little in particular to a kind of TD-LTE public network group systemArea switching method.
Background technology
Along with the development of the 4th third generation mobile communication network, trunked communication system also will be to the 4th generation trunking communication systemSystem evolution, traditional trunked communication system is taking private network as main, for meet different industries department Business Nature,The requirement of the aspects such as environment for use, has formed various trunked communication system. But, for general enterpriseThe departments such as industry, logistics, communications and transportation, these industry departments to cluster network require relatively low,To embody economic benefit as main. Therefore these departments generally adopt shared frequency resource and network infrastructurePublic access mobile radio, or employing provides the mode of group service to realize in public mobile communication systemCommand scheduling function. Public network group system need to, together with the public network system integration of operator, make full use ofPublic network access network resource, resources of core network and operation management resource, do not affect public network service and public network service energyEnough organicly coexist, the digital colony network of efficient compatible, shared resource.
In cluster network, often there will be the simultaneously handover of user of a group, owing to being that the public isThe network that the group system of unifying coexists, so the time delay of switching may become higher due to collision, reduction is cutThe success rate of changing. Also there is this situation in the railway system, in the time of train fast moving, on train, use in a large numberFamily needs handover simultaneously. By installation car microscope carrier ON TRAINS, can effectively reduce handover delay, carryHigh handover success rate. But installation car microscope carrier is very difficult in cluster user, how carry at installation car notIn the situation of platform, effectively improve the handover success rate of group user, while reducing the interruption of user in handoff procedureBetween, in correlation technique, effective solution is not yet proposed at present.
The invention discloses a kind of cell switching method of the 4th generation public group system, can be used for group to useFamily switching is optimized.
In the patent that is CN201210074697.8 at application number, disclosing a kind of switching of the LTE based on TA sentencesCertainly method and device are according to comparing with agreement a reference value to the TA value of UE terminal to report, to the difference obtainingState carry out increment operation, carry out the mobile trend of UE terminal according to this mobile trend thereby statistics drawsDecision process, can improve the accuracy of switch decision, has improved eNB hand-off process performance. At application number beCell switching method and device in a kind of LTE network are disclosed in the patent of CN201210324808.6, logicalCross base station and receive the measurement report based on power uploaded of UE to the Reference Signal Received Power of each adjacent area and negativeLotus information sorts, and according to overall ranking select target community, thereby increases network utilization, and raising is cutChange power into. In the patent that is CN200810207636.8 at application number, disclose a kind of based on requirement forecasting andThe group service adaptive optimization changing method of priority, according to quality of service, terminal, type of service, endThe factors such as end pattern, switching demand, arrange two kinds of pre-switch demand thresholdings, call analytic hierarchy process (AHP) weight squareAssociated weight matrix in battle array database, obtains treating the queue of pre-switch service priority. The present invention has improved and has cutChange efficiency, increased network gain. In the patent that is CN200880130195.4 at application number, one is disclosedThe method and apparatus switching for wireless network group, by containing multiple users' group, by source base station handleAll information of this group user send to target BS. The present invention has reduced significantly in group handoff procedure and has believedThe duration that the expense of order and group are switched, thus the time that service to mobile stations interrupts reduced, and canWith existing wireless network compatibility.
In current patent, there is no the switching side for a large amount of group user are switched in public network group system simultaneouslyMethod, but all information of group user are sent to target BS from source base station together, but actual feelingsGroup user not all in condition all can be switched, and the suitable switching of group user and user at that timeParameter information also cannot determine.
Summary of the invention
For above deficiency of the prior art, the object of the present invention is to provide one to reduce group's switchingCollision in process, thus reduced the time that service to mobile stations interrupts, and can with existing wireless networkThe compatible cell switching method that is suitable for TD-LTE public network group system. Technical scheme of the present invention is as follows: oneKind be suitable for the cell switching method of TD-LTE public network group system, in its small area, comprise common group user MS,Bridge group user BNS and source base station BS1, community is outside equipped with target BS BS2, described community switching sideMethod comprises the following steps:
101, when the signal strength values that receives source base station BS1 as common group user MS is less than threshold value M1,Common group user MS signalling of bouquet handover request is to source base station BS1, and this source base station BS1 is according to receivingCluster handover request, send switching command to bridge group user BNS, and send handover acknowledge request simultaneouslyGive common group user MS, this handover acknowledge request comprises that common group user MS is connected to bridge group userThe destination channel information of BNS;
102, common group user MS sends according to the handover acknowledge request receiving in step 101 company of measurementThe request that connects is to bridge group user BNS, and this bridge group user BNS sends to measure and connects acknowledges requests and provideMeasurement channel is given to common group user MS, and bridge group user BNS and common group user MS form oneIndividual casual network;
103, as the bridge group user BNS in step 102, to receive the signal strength values of source base station BS1 littleIn the time of threshold value M2, the connection of bridge group user BNS disconnection and source base station BS1, and to target BS BS2Send Access Control request, this target BS BS2 sends handoff response to bridge group user BNS, Bridge GroupAccess is carried out in group user BNS request, this target BS BS2 Resources allocation to bridge group user BNS;
104, in step 103, access the bridge group user BNS request target base station BS 2 of target BS BS2Distribute and measure channel to common group user MS, common group user MS replys and request target base station BS 2 is heldRow is measured and is connected, the transmission that this target BS BS2 Resources allocation realizes Frame to common group user MS,Complete the handoff procedure of domestic consumer.
Further, the bridge group user in step 102 and step 103 and the company of common group user MSConnecing network is mobile ad-hoc network, Wimax, or WLAN.
Further, described bridge group user installation has at least two cover transceivers, allows simultaneously at two notThe network of same frequency communicates.
Advantage of the present invention and beneficial effect are as follows:
The present invention is leading other group user to carry out moving across community by bridge group user, in order to preventThe collision that a large number of users brings while switching simultaneously and signaling storm, wherein bridge group user is to belong toA member in this group. Can improve a large amount of group user by this changing method moves across community simultaneouslyMoving handover success rate, reduces handoff time delay.
Brief description of the drawings
Fig. 1 is that the group user in the preferred embodiment of the present invention moves schematic diagram;
Fig. 2 is changing method schematic diagram of the present invention;
Fig. 3 is changing method schematic block diagram of the present invention;
Fig. 4 is changing method flow chart of the present invention;
Fig. 5 uses unique user handover delay analogous diagram in the group of changing method in the present invention.
Detailed description of the invention
The invention will be further elaborated to provide a non-limiting embodiment below in conjunction with accompanying drawing. ButShould be appreciated that, these descriptions are exemplary, and do not really want to limit the scope of the invention. In addition, withIn lower explanation, omit the description to known features and technology, of the present invention general to avoid unnecessarily obscuringRead.
Figure 1 shows that the group user mobile context schematic diagram of this method, can see the use that has a groupFamily needs handover simultaneously.
Figure 2 shows that changing method schematic diagram of the present invention.
Fig. 3 shows changing method flow chart of the present invention. In step 301, large in same groupAmount group user need to be carried out handover simultaneously. In step 302, common group user is accurate lower than switchingThe standby thresholding that sets out, joins the casual network being made up of the bridge user of group, forwards by bridge group userInformation, wherein switching preparation threshold M1 can be the pilot signal strength of user's reception sources community and Target cellRecently determine, the M1 that mentioned is here that pilot signal strength is than being M1=1.2. Step 303 has been pointed out bridgeGroup user is leading connected common group user to carry out moving across community. In step 304, bridgeGroup user meets the handover trigger thresholding of unique user, and fill order's subscriber handover process wherein switches and preparesThresholding M2 can be that the pilot signal strength of user's reception sources community and Target cell is recently determined, carries hereTo M2 be pilot signal strength than being M2=0.9. In step 305, common group user is at target baseStand in region, can by predefined time window function orderly add target BS.
Fig. 4 is changing method flow chart of the present invention, and cut a kind of community of the TD-LTE of being suitable for public network group systemChange method, comprise the following steps:
Source base station is received the measurement report of common group user, determines whether to initiate group and switches, if initiate groupGroup switching notifies bridge group user to prepare to accept common group user, and should to common group user transmissionAnswer message, bridge group user also sends response message to source base station.
Domestic consumer is connected in the casual network of bridge group user composition, starts to accept to be used by bridge groupThe data that family forwards. Thereby complete handoff preparation phase.
Bridge group user is carried out the handover at alone family, and source base station is received the measurement report of bridge group userAccuse, send handover request (HandoverRequest) message by X2 mouth or S1 mouth to target BS,This switching includes but not limited to the switching that mobility triggers. During HandoverRequest is careful, comprises but do not limitIn the RRC of UE context, UE ability and the ready message that re-establishes that comprises handover source base station information. BridgeGroup user reconnects to target BS by measurement, authentication, registration, and so far handover execution stage completes.
Common group user is distributed the measuring machine meeting and the resource that reenter target BS, and common group user hasOrder is connected to target BS, and so far, whole handoff algorithms completes.
Figure 5 shows that unique user handover delay analogous diagram in the group that uses changing method in the present invention. FromIn figure, we can see, a lot of group user, owing to using traditional changing method, are switched at a large number of usersTime produced a large amount of collisions, caused higher handover delay, and used the changing method energy in the present inventionEnough avoid a large number of users to produce and switch collision, reduce handover delay.
These embodiment are interpreted as being only not used in for the present invention is described restriction protection model of the present invention aboveEnclose. After having read the content of record of the present invention, technical staff can to the present invention do various changes orAmendment, these equivalences change and modification falls into the model that cell switching method claim of the present invention limits equallyEnclose.
Claims (3)
1. be suitable for a cell switching method for TD-LTE public network group system, in its small area, comprise common groupGroup user MS, bridge group user BNS and source base station BS1, community is outside equipped with target BS BS2, its spyLevy and be, described cell switching method comprises the following steps:
101, when the signal strength values that receives source base station BS1 as common group user MS is less than threshold value M1,Common group user MS signalling of bouquet handover request is to source base station BS1, and this source base station BS1 is according to receivingCluster handover request, send switching command to bridge group user BNS, and send handover acknowledge request simultaneouslyGive common group user MS, this handover acknowledge request comprises that common group user MS is connected to bridge group userThe destination channel information of BNS;
102, common group user MS sends according to the handover acknowledge request receiving in step 101 company of measurementThe request that connects is to bridge group user BNS, and this bridge group user BNS sends to measure and connects acknowledges requests and provideMeasure channel to common group user MS, bridge group user BNS and common group user MS form oneCasual network;
103, as the bridge group user BNS in step 102, to receive the signal strength values of source base station BS1 littleIn the time of threshold value M2, the connection of bridge group user BNS disconnection and source base station BS1, and to target BS BS2Send Access Control request, this target BS BS2 sends handoff response to bridge group user BNS, Bridge GroupAccess is carried out in group user BNS request, this target BS BS2 Resources allocation to bridge group user BNS;
104, in step 103, access the bridge group user BNS request target base station BS 2 of target BS BS2Distribute and measure channel to common group user MS, common group user MS replys and request target base station BS 2 is heldRow is measured and is connected, the transmission that this target BS BS2 Resources allocation realizes Frame to common group user MS,Complete the handoff procedure of domestic consumer.
2. the cell switching method that is suitable for TD-LTE public network group system according to claim 1, itsBe characterised in that: the bridge group user in step 102 and step 103 and the connection network of common group user MSNetwork is mobile ad-hoc network, Wimax, or WLAN.
3. the cell switching method that is suitable for TD-LTE public network group system according to claim 1, itsBe characterised in that: described bridge group user installation has at least two cover transceivers, allow simultaneously frequently different at twoThe network of rate communicates.
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| US10542464B2 (en) * | 2016-04-01 | 2020-01-21 | Futurewei Technologies, Inc. | Methods for data communication to a platoon of connected vehicles |
| CN106686570B (en) * | 2016-06-28 | 2020-06-02 | 海能达通信股份有限公司 | Terminal cluster registration method, device and system and core network equipment |
| CN113869896A (en) * | 2021-09-13 | 2021-12-31 | 中国移动通信集团云南有限公司 | Public network and private network block chain network platform and building method thereof |
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| CN103167423A (en) * | 2011-12-16 | 2013-06-19 | 鼎桥通信技术有限公司 | Cell switching method, device and system for monitoring user terminal in clustered system |
| CN103237342A (en) * | 2013-04-28 | 2013-08-07 | 哈尔滨工业大学 | Cross identity registration method for co-group users of time division-long term evolution-based (TD-LTE-based) public network and cluster |
| CN103260146A (en) * | 2013-06-03 | 2013-08-21 | 重庆邮电大学 | Identification management method of TD-LTE public trunked communication system |
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| US8050223B2 (en) * | 2007-04-12 | 2011-11-01 | Wi-Lan Inc. | System and method for facilitating co-channel and co-existence via enhanced frame preambles |
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| CN103167423A (en) * | 2011-12-16 | 2013-06-19 | 鼎桥通信技术有限公司 | Cell switching method, device and system for monitoring user terminal in clustered system |
| CN102521044A (en) * | 2011-12-30 | 2012-06-27 | 北京拓明科技有限公司 | Distributed task scheduling method and system based on messaging middleware |
| CN103237342A (en) * | 2013-04-28 | 2013-08-07 | 哈尔滨工业大学 | Cross identity registration method for co-group users of time division-long term evolution-based (TD-LTE-based) public network and cluster |
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