CN101873650B - Switching method and device of user equipment in spatial division multiple access - Google Patents
Switching method and device of user equipment in spatial division multiple access Download PDFInfo
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- CN101873650B CN101873650B CN2009100826913A CN200910082691A CN101873650B CN 101873650 B CN101873650 B CN 101873650B CN 2009100826913 A CN2009100826913 A CN 2009100826913A CN 200910082691 A CN200910082691 A CN 200910082691A CN 101873650 B CN101873650 B CN 101873650B
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Abstract
The invention discloses a switching method and a device of user equipment (UE) in spatial division multiple access (SDMA). The corresponding relationship between channels in a cell and the channels of the adjacent cell is simultaneously configured when configuring the corresponding relationship between the cell and the adjacent cell, and a wireless network controller (RNC) can decide which channel of which target cell where the UE to be switched is switched to during the switching according to the two relationships, thereby leading the UE to be switched and the existing UE of the channel to equally share carrier waves of the channel when distributing resources, ensuring that the business in the target cell is not affected when switching the UE and not increasing the probability of call drop.
Description
Technical field
The present invention relates to handoff technique, particularly the spatial scalability multiple access inserts the changing method and the device of subscriber equipment (UE, User Equipment) in (SDMA, Space Division Multiple Access).
Background technology
The SDMA technology makes the UE that is positioned at different directions or distinct coverage region use identical time slot, carrier wave and code channel resource a kind of form of spatial character as resource division.Specifically, the SDMA technology is set up N passage in the sub-district with spatial scalability condition, each channel arrangement carrier wave 0～M, and the same carrier wave that is positioned at different passages can be used as resource allocation and gives different UE.In SDMA,, make them can use identical interface-free resources like this, promoted the capacity of system through different user is linked in the different passages.
At present; When UE inserted a certain sub-district, UE controlled (RRC, Radio Resource Control) message to radio network controller (RNC through Radio Resource; Radio Network Controller) reports the channel number that will insert; RNC inserts this UE this passage and makes all UE in this passage on each carrier wave, divide equally, and promptly distributes different carrier waves to each UE in this passage as far as possible, can farthest improve single user's the speed and the throughput of whole sub-district like this.
The maximum characteristics of wireless communication user are exactly the continuity of its business in moving process; In the prior art; For guaranteeing the continuity in the moving process, in the network planning, can be the different neighbor cell of each cell configuration, but after the SDMA technology is introduced passage; Prior art is not introduced the notion of adjacency channel, and this will switch the problem of bringing to UE.
Fig. 1 is the changing method flow chart of UE among the prior art SDMA, and this flow process comprises:
Step 101:RNC according to the measurement report combination algorithm strategic decision-making UE is switched, and when switching condition satisfies, select target sub-district from the neighbor cell of UE current area.
Step 102:RNC is the UE Resources allocation at Target cell.
In this step, RNC carries out professional requirement itself according to loading condition, disturbed condition and the UE of Target cell and carries out the distribution of resource.
The resource allocation process of this step is described with an instance.Fig. 2 is the sketch map of UE Resources allocation for RNC in the flow process shown in Figure 1, and in this example, source is the initial sub-district of inserting of UE1, and target side is carried out the sub-district that UE1 need switch in the process for business.Because RNC can not adjudicate which passage that UE is switched to Target cell, therefore can only load is less, disturb carrier wave Random assignment less and that satisfy business need to give UE1.As shown in Figure 2; Target side itself exists F0 and 1 two carrier waves of F, and has distributed to UE5 and UE6 respectively on these two carrier waves, and is identical from two carrier waves of loading condition; Suppose that the interference of carrier wave F1 is less and satisfy business need, RNC just can distribute to UE1 with carrier wave F1.
Step 103:RNC carries out handoff procedure.
Step 104:RNC judge to switch whether success, if execution in step 105 then, otherwise return execution in step 101.
Step 105:RNC upgrades internal data, switches to accomplish.
The UE that step 106:RNC reports according to the base station switches the residing channel number in back; Existing other UE in UE and this passage are adjusted; Carry out dynamic channel allocation (DCA, Dynamic Channel Allocation), to guarantee that all UE in this passage carry out carrier wave and divide equally.
In this step, as still being example with Fig. 2, owing to only comprise carrier wave F0 in the passage 1 of Target cell described in Fig. 2, so the result that divides equally of carrier wave remains distributing carrier wave F0 of UE5 and UE1.
Can find out that through above-mentioned flow process shown in Figure 1 there is following problem in the changing method of UE among the prior art SDMA:
1, in handoff procedure during Resources allocation; Because RNC can not know UE will switch in which passage of Target cell, can only be the UE Resources allocation at random therefore according to loading condition, disturbed condition and professional requirement own; After possibly causing UE incision Target cell; Some carrier load of individual channels is excessive, influences the business of Target cell, even causes service disconnection;
2, after switching completion; In order farthest to improve single user's the speed and the throughput of whole sub-district; RNC also needs the UE that reports according to the base station to belong to channel number; All UE in this passage are carried out DCA, this time delay that extended on the one hand, frequent on the other hand adjustment has increased probability of call.
Summary of the invention
The present invention provides the changing method of UE among a kind of SDMA, when this method can guarantee that UE switches, and professional unaffected in the Target cell, and can not increase probability of call.
The present invention provides the switching device shifter of UE among a kind of SDMA, when this device can guarantee that UE switches, and professional unaffected in the Target cell, and can not increase probability of call.
Technical scheme of the present invention is achieved in that
The changing method of subscriber equipment during a kind of spatial scalability multiple access inserts, key is that allocating cell is adjacent first corresponding relation of sub-district in radio network controller (RNC), the passage in the allocating cell is adjacent second corresponding relation of the passage in the sub-district; This method also comprises:
RNC determines Target cell according to be switched user equipment (UE) cell-of-origin, place and said first corresponding relation from the corresponding neighbor cell in cell-of-origin;
RNC is to be switched UE select target passage from the passage of said Target cell according to the passage and said second corresponding relation to be switched UE place in the said cell-of-origin;
RNC is to be switched UE Resources allocation, makes the existing UE in to be switched UE and the said destination channel divide equally each carrier wave in this destination channel;
RNC switches to the destination channel in the Target cell with to be switched UE.
The switching device shifter of subscriber equipment during a kind of spatial scalability multiple access inserts, key is that this device comprises:
Memory module is used for storing first corresponding relation that the sub-district is adjacent the sub-district, the passage of sub-district is adjacent second corresponding relation of the passage in the sub-district;
Determination module is used for from the corresponding neighbor cell in cell-of-origin, determining Target cell according to be switched user equipment (UE) cell-of-origin, place and said first corresponding relation; According to passage and said second corresponding relation in the cell-of-origin, to be switched UE place, from the passage of said Target cell to be switched UE select target passage;
Resource distribution module is used to be switched UE Resources allocation, makes the existing UE in to be switched UE and the said destination channel divide equally each carrier wave in this destination channel;
Handover module is used for to be switched UE is switched to the destination channel of Target cell.
It is thus clear that; The changing method of UE among the SDMA of the present invention; When the corresponding relation of allocating cell and neighbor cell thereof; Also disposed the corresponding relation that the passage in the sub-district is adjacent the passage in the sub-district simultaneously; RNC just can adjudicate which passage which Target cell to be switched UE will switch to according to these two kinds of corresponding relations in switching, also just can when Resources allocation, will make the existing UE of to be switched UE and this passage divide equally the carrier wave of this passage, farthest improves single user's the speed and the throughput of whole sub-district.RNC has just avoided as prior art, being at random to be switched UE Resources allocation like this; And the channel number that after switching completion, reports according to the base station is carried out DCA to this passage; Therefore in the time of can guaranteeing that UE switches, professional unaffected in the Target cell, and can not increase probability of call.
Description of drawings
Fig. 1 is the changing method flow chart of UE among the prior art SDMA;
Fig. 2 is the sketch map of UE Resources allocation for RNC in the flow process shown in Figure 1;
Fig. 3 is the flow chart of the changing method of UE among the SDMA of the present invention;
Fig. 4 is the embodiment flow chart of the changing method of UE among the SDMA of the present invention;
Fig. 5 is the structural representation of the switching device shifter of UE among the SDMA of the present invention.
Embodiment
For making objects and advantages of the present invention clearer, the present invention is done further detailed description below in conjunction with accompanying drawing and embodiment.
Fig. 3 is the flow chart of the changing method of UE among the SDMA of the present invention, and before this flow process began, allocating cell was adjacent first corresponding relation of sub-district in RNC, and the passage in the allocating cell is adjacent second corresponding relation of the passage in the sub-district.
Flow process shown in Figure 3 comprises:
Step 301:RNC belongs to the cell-of-origin, reaches said first corresponding relation according to be switched UE, from the corresponding neighbor cell in cell-of-origin, determines Target cell.
Step 302:RNC is to be switched UE select target passage from the passage of said Target cell according to the passage to be switched UE place in the said cell-of-origin, and said second corresponding relation.
Step 303:RNC is to be switched UE Resources allocation, makes the existing UE in to be switched UE and the said destination channel divide equally each carrier wave in this destination channel.
Step 304:RNC switches to the destination channel in the Target cell with to be switched UE.
It is thus clear that; The changing method of UE among the SDMA of the present invention; When the corresponding relation of allocating cell and neighbor cell thereof; Also disposed the corresponding relation that the passage in the sub-district is adjacent the passage in the sub-district simultaneously; RNC just can adjudicate which passage which Target cell to be switched UE will switch to according to these two kinds of corresponding relations in switching, also just can when Resources allocation, will make the existing UE of to be switched UE and this passage divide equally the carrier wave of this passage, farthest improves single user's the speed and the throughput of whole sub-district.RNC has just avoided as prior art, being at random to be switched UE Resources allocation like this; And the channel number that after switching completion, reports according to the base station is carried out DCA to this passage; Therefore in the time of can guaranteeing that UE switches, professional unaffected in the Target cell, and can not increase probability of call.
Fig. 4 is the embodiment flow chart of the changing method of UE among the SDMA of the present invention; In the present embodiment; According to the network planning, allocating cell is adjacent first corresponding relation of sub-district in RNC, and the passage in the allocating cell is adjacent second corresponding relation of the passage in the sub-district.
Above-mentioned configuration second corresponding relation is to each passage in the sub-district, in each neighbor cell of this sub-district, selects maximum passages adjacent on the geographical position, sets up corresponding relation.
Flow process shown in Figure 4 comprises:
Step 401:RNC according to the measurement report combination algorithm strategic decision-making UE is switched.
Step 402:RNC belongs to the cell-of-origin, reaches first corresponding relation according to be switched UE, from the corresponding neighbor cell in cell-of-origin, determines Target cell.
Step 403:RNC is to be switched UE select target passage from the passage of Target cell according to the passage to be switched UE place in the cell-of-origin, and second corresponding relation.
Step 404:RNC is to be switched UE Resources allocation, makes the existing UE in to be switched UE and the said destination channel divide equally each carrier wave in this destination channel.
Step 405:RNC switches to the destination channel in the Target cell with to be switched UE.
Step 406:RNC judges whether switching is successful, if then execution in step 407; Otherwise execution in step 402.
In this step, if after this switching less than success, is then returned step 402, RNC will confirm Target cell and destination channel again.
Step 407:RNC upgrades internal data, process ends.
For realizing the changing method of UE among the SDMA of the present invention, the present invention also proposes the switching device shifter of UE among a kind of SDMA, and this device is positioned at RNC one side, can be integrated among the RNC, and also can be the self-contained unit that links to each other with RNC.
Fig. 5 is the structural representation of the switching device shifter of UE among the SDMA of the present invention, and this device comprises: memory module, determination module, resource distribution module and handover module.Wherein,
Memory module is used for storing first corresponding relation that the sub-district is adjacent the sub-district, the passage of sub-district is adjacent second corresponding relation of the passage in the sub-district.
Determination module is used for according to cell-of-origin, to be switched user equipment (UE) place, reaches said first corresponding relation, from the corresponding neighbor cell in cell-of-origin, determines Target cell; According to the passage in the cell-of-origin, to be switched UE place, and said second corresponding relation, from the passage of said Target cell to be switched UE select target passage.
Resource distribution module is used to be switched UE Resources allocation, makes the existing UE in to be switched UE and the said destination channel divide equally each carrier wave in this destination channel.
Handover module is used for to be switched UE is switched to the destination channel of Target cell.
Reselect Target cell and destination channel for being implemented in when this switching gets nowhere, further comprise in the said apparatus: judge module and data update module.Wherein,
Judge module is used to judge the whether success of switching of said handover module, if, trigger data update module then; Otherwise, trigger said determination module executable operations again.
Data update module is triggered by said judge module, is used to upgrade the inner data of RNC.
Also further comprise in this device: decision-making module, be used for to be switched UE being switched according to measurement report and algorithm policy decision-making, trigger said determination module executable operations then.
Each module in the said apparatus repeats no more to the detailed process of carrying out all according to the corresponding step executable operations in the inventive method here.
In sum, more than being merely the preferred embodiment of present embodiment, is not to be used to limit protection scope of the present invention.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. the changing method of subscriber equipment during a spatial scalability multiple access inserts; It is characterized in that; Allocating cell is adjacent first corresponding relation of sub-district in radio network controller (RNC), and the passage in the allocating cell is adjacent second corresponding relation of the passage in the sub-district; This method also comprises:
RNC determines Target cell according to be switched user equipment (UE) cell-of-origin, place and said first corresponding relation from the corresponding neighbor cell in cell-of-origin;
RNC is to be switched UE select target passage from the passage of said Target cell according to the passage and said second corresponding relation to be switched UE place in the said cell-of-origin;
RNC is to be switched UE Resources allocation, makes the existing UE in to be switched UE and the said destination channel divide equally each carrier wave in this destination channel;
RNC switches to the destination channel in the Target cell with to be switched UE.
2. the method for claim 1 is characterized in that, second corresponding relation that the passage in the said allocating cell is adjacent the passage in the sub-district is:
To each passage in the sub-district, in each neighbor cell of this sub-district, select maximum passages adjacent on the geographical position, set up corresponding relation.
3. according to claim 1 or claim 2 method is characterized in that, said RNC further comprises after carrying out and switching:
RNC judge to switch whether success, if, process ends after upgrading internal data then, otherwise, return and carry out the step of from the corresponding neighbor cell in cell-of-origin, determining Target cell again.
4. method as claimed in claim 3 is characterized in that, the said execution again when from the corresponding neighbor cell in cell-of-origin, determining the step of Target cell, and the Target cell of determining again is different with the Target cell that said execution is again determined before.
5. according to claim 1 or claim 2 method is characterized in that, saidly from the corresponding neighbor cell in cell-of-origin, determines before the Target cell, further comprises:
RNC switches to be switched UE according to measurement report and algorithm policy decision-making.
6. the switching device shifter of subscriber equipment during a spatial scalability multiple access inserts is characterized in that this device comprises:
Memory module is used for storing first corresponding relation that the sub-district is adjacent the sub-district, the passage of sub-district is adjacent second corresponding relation of the passage in the sub-district;
Determination module is used for from the corresponding neighbor cell in cell-of-origin, determining Target cell according to be switched user equipment (UE) cell-of-origin, place and said first corresponding relation; According to passage and said second corresponding relation in the cell-of-origin, to be switched UE place, from the passage of said Target cell to be switched UE select target passage;
Resource distribution module is used to be switched UE Resources allocation, makes the existing UE in to be switched UE and the said destination channel divide equally each carrier wave in this destination channel;
Handover module is used for to be switched UE is switched to the destination channel of Target cell.
7. device as claimed in claim 6 is characterized in that, further comprises in this device: judge module and data update module;
Said judge module is used to judge the whether success of switching of said handover module, if, trigger data update module then; Otherwise, trigger said determination module executable operations again;
Said data update module is triggered by said judge module, is used to upgrade the inner data of radio network controller (RNC).
8. like claim 6 or 7 described devices, it is characterized in that, further comprise in this device: decision-making module, be used for to be switched UE being switched according to measurement report and algorithm policy decision-making, trigger said determination module executable operations then.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0743802A2 (en) * | 1995-05-19 | 1996-11-20 | Alcatel SEL Aktiengesellschaft | Processor controlled arrangement for mobile station tracking in a mobile radio system with space division multiple access |
| CN1244998A (en) * | 1996-12-04 | 2000-02-16 | 诺基亚电信股份公司 | Controlling handover in a mobile communication network |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0743802A2 (en) * | 1995-05-19 | 1996-11-20 | Alcatel SEL Aktiengesellschaft | Processor controlled arrangement for mobile station tracking in a mobile radio system with space division multiple access |
| CN1244998A (en) * | 1996-12-04 | 2000-02-16 | 诺基亚电信股份公司 | Controlling handover in a mobile communication network |
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