CN100375578C - Method for selecting target housing-estate customer data transmitting spot in relay switch-over - Google Patents
Method for selecting target housing-estate customer data transmitting spot in relay switch-over Download PDFInfo
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- CN100375578C CN100375578C CNB2005100831260A CN200510083126A CN100375578C CN 100375578 C CN100375578 C CN 100375578C CN B2005100831260 A CNB2005100831260 A CN B2005100831260A CN 200510083126 A CN200510083126 A CN 200510083126A CN 100375578 C CN100375578 C CN 100375578C
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Abstract
The present invention discloses a method for selecting customer data transmitting spots in target housing estates in relay switching, which belongs to the field of synchronous time-division code-division multiple addresses. The method for selecting target housing-estate customer data transmitting spots in relay switching comprises: a target housing estate allocates wireless links for mobile terminals and sends user data to the original housing estate and the target housing estate; the original housing estate sends the data to the mobile terminals, and the housing estate only sends special burst signals; the mobile terminals reconfigure uplink channels after receiving a reconfiguration command and send the special burst signals to the target housing estate; the main lobe directions of intelligent antennae are aligned to the mobile terminals by a node B of the target housing estate according to the wave beam shapes of the special burst signals, and then, the down-line user data is sent; the mobile terminals accomplish the configuration of down-line channels in the target housing estate and releases the wireless links of the original housing estate. The present invention enhances the transmitting power of a new RL, ensures that UE receives the user data transmitted by the target housing estate in a switching region and simultaneously avoids interfering with other UE.
Description
Technical field
The present invention relates to TD SDMA (TD-SCDMA, Time Division-Synchronous CodeDivision Multiple Access) mobile communication technology field relates in particular to the system of selection of Target cell customer data transmitting spot in the baton handover of TD SDMA (TD-SCDMA) mobile communication system.
Background technology
Because mobile communication system adopts honeycomb,, user's set (UE, User Equipment) do not interrupt with the communication that inserts side so when crossing over the sub-district of spatial division, keeping UE; Perhaps when the signal quality of Serving cell decayed to certain limit, UE can be transformed into the better quality of signal sub-district; At this moment, must carry out handover, promptly finish the transfer of UE, and Node B arrives the corresponding transfer of switching center to web portal and web portal to the air interface of Node B.In first generation analogue system and second generation gsm system, all adopt and distinguish hard-switching technology more, the implementation of direct-cut operation is, UE needs the original Radio Link (RL of deletion earlier, Radio Link), enable new Radio Link then and carry out communication with the access side, this technology makes system approximately lose the information of 300ms in handoff procedure, and the channel resource that takies simultaneously is more.
In the TD-SCDMA system, except that adopting direct-cut operation, also adopt baton handover.Baton handover is divided into four steps, i.e. measuring process, presynchronization process, judging process and implementation.Baton handover utilizes technology such as smart antenna and uplink synchronous, judges as supplementary whether present UE has moved to the close region of the adjacent node B that can switch according to orientation and the distance between UE and Node B of UE.If UE enters Zone switched, radio network controller (RNC then, Radio Network Controller) preparation of notifying this Node B to carry out switching, it is the same that relay baton is transmitted in the relay in the similar track and field events of this process, thereby be referred to as baton handover visually.Adopt baton handover can reach not drop-out, not interrupt communication, the purpose of saving channel resource.
The relay switching method of existing TD-SCDMA system is specific as follows:
In UE and Node B communication process, UE need measure the pilot signal strength of this sub-district Node B and neighbor cell Node B.The measurement of UE can be periodically to carry out by the RNC appointment, also can be undertaken by Event triggered.
The presynchronization process of baton handover belongs to open loop presynchronization, record is from the signal of each adjacent cell Node B and delay inequality from this sub-district Node B signal when UE measures the pilot signal strength of this sub-district Node B and neighbor cell Node B, obtain the synchronization parameter with Target cell in advance, and by open loop approach keep with Target cell synchronously.
After Target cell was determined, RNC was direct-cut operation (belonging to different RNC) or baton handover (belonging to same RNC) according to relation judgement Target cell and former sub-district.Suppose that all sub-districts all belong to same RNC, promptly adjudicate UE and carry out baton handover.RNC will carry out baton handover.At first Target cell is sent Radio Link and set up request.After RNC receives that the Radio Link foundation of Target cell is finished, to send the business datum carrying simultaneously to former sub-district and Target cell, these data from former sub-district and Target cell eat dishes without rice or wine send, simultaneously RNC sends the order of physical channel reconfiguration message, i.e. switching command to UE.
After UE receives switching command, receive downlink bearing business and signaling and by up bearer service and the signaling of Target cell emission by former sub-district.Simultaneously, utilize the former sub-district and power difference DELTA P between the Target cell and the time difference Δ t that obtain in advance, the synchronous and power control by open loop is in up bearer service and the signaling of Target cell emission.After continuing for some time, bring into use newly to be configured in the Target cell downlink data receiving, realize closed power and Synchronization Control, interrupt finishing handoff procedure from former sub-district downlink data receiving.After switching command sends, receive handover success message as RNC from UE, then RNC sends request to former sub-district, deletes the Radio Link of former sub-district.
The feature of baton handover has two: 1. in the baton handover process, Target cell and former sub-district are all sending downlink data.2. in the whole baton handover process, UE only receives the reconfigure command of once sending from RNC, and UE reshuffles the up channel of oneself according to this order; But the configuration of down channel is the timing that rule of thumb is worth to be triggered, and just after receive reconfigure command, UE oneself is provided with a timer, timer then after, the configuration of reprovision down channel.And corresponding first feature, when when sending datagram, needing to judge the time point that sends valid data to two RL (Radio Link) simultaneously.
If when new RL has just set up, send user data at once downwards, the base band side of this RL correspondence sends this user data eating dishes without rice or wine, at this moment the data of Fa Songing send in sub-district omnidirectional, for this RL, its transmitting power can not arrive cell edge, and the UE great majority when switching are at cell edge.If UE can not receive data, then these data are exactly invalid; These data also can cause interference to other UE in the invalid transmission of eating dishes without rice or wine simultaneously.
Summary of the invention
The objective of the invention is to solve when the new RL of Target cell has just set up, UE is at the Zone switched user data that does not receive the Target cell transmission, the problem and shortage that the invalid transmission of these data simultaneously also can cause interference to deposit to other UE of Target cell provides a kind of transmitting power that improves new RL, guarantees that UE is Zone switchedly receiving user data that Target cell sends, can avoid other UE is caused the system of selection of Target cell customer data transmitting spot in the baton handover of interference simultaneously.
For addressing the above problem, the present invention adopts following technical scheme: the system of selection of Target cell customer data transmitting spot in a kind of baton handover may further comprise the steps:
When 1) the radio network controller decision is carried out baton handover to portable terminal, after radio network controller receives that the Radio Link of Target cell is set up the message of finishing, send down user data simultaneously to the Node B of former sub-district and the Node B of Target cell, by former sub-district eat dishes without rice or wine send described down user data to portable terminal, the special burst of eating dishes without rice or wine only to send of Target cell;
2) radio network controller sends reconfigure command by the Radio Link of former sub-district to portable terminal, portable terminal is reshuffled up channel, and send special burst to the Node B of Target cell, the Node B of described Target cell is according to the wave beam forming of this special burst signal, the main lobe direction of its smart antenna is aimed at portable terminal, begin to send down user data then;
3) portable terminal is finished the down channel configuration at Target cell, discharges the Radio Link of former sub-district.
Technical scheme according to the invention described above, in baton handover, by the smart antenna main lobe direction of Target cell Node B is aimed at portable terminal, improved the transmitting power of new RL greatly, can guarantee effectively that UE is at the Zone switched user data that receives the Target cell transmission; Simultaneously, avoided the interference that the invalid transmission of these data causes other UE of Target cell in the handoff procedure.
Embodiment
Below in conjunction with embodiment, further specify technical characterictic of the present invention and function characteristics, purpose is that the present invention can be described better, but is not to be used for limiting protection scope of the present invention.
The system of selection of Target cell customer data transmitting spot in the baton handover of the present invention may further comprise the steps:
1) after the UE Target cell that will switch was determined, RNC sent Radio Link to Target cell and sets up request before sending switching command.After RNC receives that the Radio Link of Target cell is set up the message of finishing, send down user data simultaneously to the Node B of former sub-district and the Node B of Target cell, by former sub-district eat dishes without rice or wine send this down user data to portable terminal, this down user data of eating dishes without rice or wine to abandon of Target cell only sends special burst;
2) RNC sends the physical layer reconfigure command by the RL of former sub-district to UE, and this reconfigure command comprises physical channel reconfigure command, transmission channel reconfigure command and radio bearer (RB, Radio Bearer) reconfigure command; After UE receives reconfigure command, when judging that according to the parameter of reconfigure command this switches to baton handover, up channel is reshuffled, and send special burst to the Node B of Target cell, UE can continue to send uplink user data in former sub-district under possible situation; The Node B of described Target cell is according to the wave beam forming of this special burst signal, the main lobe direction of its smart antenna is aimed at portable terminal, improved the transmitting power of new RL greatly, can guarantee effectively that UE is at the Zone switched user data that receives the Target cell transmission, simultaneously, avoided the interference that the invalid transmission of these data causes other UE of Target cell in the handoff procedure; The special burst of eating dishes without rice or wine to stop to send of Target cell then, Node B begins to send down user data, and sends special burst when no down user data;
UE can send uplink user data at Target cell, and interrupt the up-link wireless link of former sub-district after Target cell is received the special burst or down user data that Node B sends;
3) portable terminal is finished the down channel configuration at Target cell, discharges the Radio Link of former sub-district.That is, UE finishes the configuration to down channel, accepts down user data from Target cell, sends physics to RNC simultaneously and reshuffles the message of finishing;
When RNC receive physical layer that UE sends reshuffle finish message after, discharge the air-link resources of former sub-district, the baton handover flow process finishes.
Here, former sub-district and Target cell can shared Node B or are used a Node B respectively.If during the shared Node B of former sub-district and Target cell, the difference of eating dishes without rice or wine of use.
Above-mentioned embodiment describes the present invention with preferred embodiment, but the example of this visualization of just lifting for the ease of understanding should not be considered to be limitation of the scope of the invention.Equally, according to the description of technical scheme of the present invention and preferred embodiment thereof, can make various possible being equal to and change or replacement, and all these changes or replacement all should belong to the protection range of claim of the present invention.
Claims (6)
1. the system of selection of Target cell customer data transmitting spot in the baton handover is characterized in that this method may further comprise the steps:
When 1) the radio network controller decision is carried out baton handover to portable terminal, after radio network controller receives that the Radio Link of Target cell is set up the message of finishing, send down user data simultaneously to the Node B of former sub-district and the Node B of Target cell, by former sub-district eat dishes without rice or wine send described down user data to portable terminal, the special burst of eating dishes without rice or wine only to send of Target cell;
2) radio network controller sends reconfigure command by the Radio Link of former sub-district to portable terminal, portable terminal is reshuffled up channel, and send special burst to the Node B of Target cell, the Node B of described Target cell is according to the wave beam forming of this special burst signal, the main lobe direction of its smart antenna is aimed at portable terminal, begin to send down user data then;
3) portable terminal is finished the down channel configuration at Target cell, discharges the Radio Link of former sub-district.
2. the system of selection of Target cell customer data transmitting spot is characterized in that in the baton handover as claimed in claim 1, described step 2) in, portable terminal continues to send uplink user data in former sub-district.
3. the system of selection of Target cell customer data transmitting spot is characterized in that in the baton handover as claimed in claim 1, described step 2) in, after the main lobe direction of smart antenna was aimed at portable terminal, Target cell sent special burst when no down user data.
4. the system of selection of Target cell customer data transmitting spot in the baton handover as claimed in claim 1, it is characterized in that, described step 2) and between the step 3) also comprise: after portable terminal is received the down user data of Node B transmission at Target cell, send uplink user data at Target cell, and interrupt the up-link wireless link of former sub-district.
5. the system of selection of Target cell customer data transmitting spot is characterized in that in the baton handover as claimed in claim 1, the shared Node B of described former sub-district and Target cell or use a Node B respectively.
6. if the system of selection of Target cell customer data transmitting spot in the described baton handover of claim 5 is characterized in that, the shared Node B point of described former sub-district and Target cell, the difference of eating dishes without rice or wine of use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100831260A CN100375578C (en) | 2005-07-13 | 2005-07-13 | Method for selecting target housing-estate customer data transmitting spot in relay switch-over |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100831260A CN100375578C (en) | 2005-07-13 | 2005-07-13 | Method for selecting target housing-estate customer data transmitting spot in relay switch-over |
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| CN1710991A CN1710991A (en) | 2005-12-21 |
| CN100375578C true CN100375578C (en) | 2008-03-12 |
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| CNB2005100831260A Expired - Fee Related CN100375578C (en) | 2005-07-13 | 2005-07-13 | Method for selecting target housing-estate customer data transmitting spot in relay switch-over |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101686514B (en) * | 2008-09-27 | 2012-04-18 | 鼎桥通信技术有限公司 | Interference optimization method when in cell switching |
| WO2011059517A1 (en) * | 2009-11-12 | 2011-05-19 | Qualcomm Incorporated | Method and apparatus for power correction in uplink synchronization during a td-scdma handover |
| CN102833804B (en) * | 2011-06-13 | 2018-02-02 | 深圳市中兴微电子技术有限公司 | Mobile terminal skip zone switching method, system and mobile terminal |
| CN102223606B (en) * | 2011-07-08 | 2014-07-02 | 重庆邮电大学 | Method for realizing relay switching in group calling of TD-SCDMA (time division-synchronization code division multiple access) cluster system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1219091A (en) * | 1998-10-20 | 1999-06-09 | 北京信威通信技术有限公司 | Method for relay switch over in synchronous code sharing multiple address communication system |
| CN1446009A (en) * | 2002-12-13 | 2003-10-01 | 大唐移动通信设备有限公司 | Switching method used in mobile comunication system |
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2005
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1219091A (en) * | 1998-10-20 | 1999-06-09 | 北京信威通信技术有限公司 | Method for relay switch over in synchronous code sharing multiple address communication system |
| CN1446009A (en) * | 2002-12-13 | 2003-10-01 | 大唐移动通信设备有限公司 | Switching method used in mobile comunication system |
Non-Patent Citations (2)
| Title |
|---|
| TD-SCDMA 的系统结构及关键技术. 薛波，颜彪，徐中华，芮晓波.现代电子技术，第14期. 2003 * |
| TD-SCDMA系统中的接力切换研究. 陈晓莉，李方伟.无线通信技术，第3期. 2003 * |
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