CN101453764B - Indication method, system and apparatus for group handoff - Google Patents
Indication method, system and apparatus for group handoff Download PDFInfo
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- CN101453764B CN101453764B CN2007101882979A CN200710188297A CN101453764B CN 101453764 B CN101453764 B CN 101453764B CN 2007101882979 A CN2007101882979 A CN 2007101882979A CN 200710188297 A CN200710188297 A CN 200710188297A CN 101453764 B CN101453764 B CN 101453764B
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- 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
- H04W36/0079—Transmission or use of information for re-establishing the radio link in case of hand-off failure or rejection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
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Abstract
The embodiment of the invention discloses a method for indicating group switching. The method comprises the following steps: a mobile station MS receives a switching indicator transmitted by a base station BS; and according to the switching indicator, after the group switching operation is confirmed to be carried out, the MS transmits a confirmation message to the BS to respond the switching indicator. Through the adoption of the method, the BS indicates the MS to carry out the group switching operation through the switching indicator, thereby providing a mechanism by which the MS can be switched among different groups in the BS service, and being capable of supporting the switching operation of the MS among different groups in the BS service.
Description
Technical field
The present invention relates to network communications technology field, particularly a kind of group of indicating means, system and device that switches.
Background technology
WiMAX (Worldwide Interoperability for Microwave Access; Micro-wave access global inter communication) is a kind of broadband wireless connectivity scenario that " last mile " is provided for enterprise and domestic consumer, can realizes high coverage (can cover 25～30 miles scope) in data communication field.
According to the dual-mode of up-downgoing, the WiMAX system can be divided into the pattern of TDD and the pattern of FDD.Wherein, downlink data by BS (Base Station, base station) to MS (Mobile Station, travelling carriage), upstream data by MS to BS.At TDD (Time Division Duplexing; Time division duplex) under the pattern; BS communicates by letter with the uplink and downlink between the MS and uses the different time-gap of same frequency channels; With time differentiating uplink and downlink data, send data to MS in certain time period by BS, send data to BS in another time period by MS.Under FDD (Frequency Division Duplex or Duplexing, FDD) pattern, the up-downgoing data are used different frequency ranges, receive and transmit.
Be operated in the MS under the fdd mode; Difference according to ability can be divided into F-FDD (FullFrequency Division Duplex or Duplexing; The full duplex FDD) MS and H-FDD (HalfFrequency Division Duplex or Duplexing, half-duplex frequency division duplex) MS.F-FDD MS has two cover transmission circuits, and a cover is used for receiving data at band downlink, and a cover is used for sending data at uplink band, and this two covers circuit can be worked simultaneously.H-FDD MS has only a cover transmission circuit, or is operated in the reception frequency range, or is operated in the transmission frequency range.
Since the MS of H-FDD can not be simultaneously transceive data; Therefore the BS that is operated under the fdd mode need carry out the scheduling of up-downgoing resource to the terminal of H-FDD; To guarantee distributing the up-downgoing resource can for the simultaneously MS of H-FDD, this will increase the complexity of BS scheduling greatly.
Prior art adopts the mode of grouping, and the MS of H-FDD is assigned in two groups.BS is when Resources allocation, and the up-downgoing of these two groups interlocks, and guarantees that from face the MS in the group can not have upstream data and downlink data simultaneously.
As shown in Figure 1; The H-FDD subscriber station is divided into two groups; On behalf of the base station, wherein descending number sending data to the subscriber station of the group of this number indication during this period of time, and the subscriber station that up number representative belongs to the group of this number indication is sending data to BS during this period of time.The subscriber station that guarantees a H-FDD in this way can not only not send but also receive in the identical time, compares with the H-FDD implementation that adopts scheduling mode, adopts the mode of dividing into groups can simplify the dispatching algorithm of base station.
But, need change in some cases the grouping of MS, as:
(1) because MS switches or moves back net, causes that the MS number in two groups is different, cause the unbalanced of two groups of loads.In order to improve the utilance of resource, need be with MS two groups of intra.
(2) if two groups are used the different coding modulation scheme, for example: the MS of group 1 is nearer from BS, can use the modulation coding mode of high-order, and the MS of group 2 is far away from BS, uses the modulation coding mode of low order.When MS moves, variation has taken place with the distance of BS, for utilance and the reliable reception that improves resource, need be with MS two groups of intra.
In realizing process of the present invention, the inventor finds that there is following problem at least in prior art:
Prior art does not provide MS method of not switching between on the same group in BS service, can not support not the switching on the same group between of MS in the BS service.
Summary of the invention
The embodiment of the invention provides a kind of group of indicating means, system and the device that switch, to realize supporting not the switching on the same group between of MS in the BS service.
For achieving the above object, the embodiment of the invention provides a kind of group of indicating means that switches on the one hand, may further comprise the steps: the mobile station MS of half-duplex frequency division duplex H-FDD receives the switching indication that base station BS sends; After confirming to organize handover operation according to said switching indication, said MS sends acknowledge message to said BS, to respond said switching indication.
On the other hand, the embodiment of the invention also provides a kind of group of indication mechanism of switching, and comprising: the mobile station MS of half-duplex frequency division duplex H-FDD; Be used for receiving switching and indicate; After confirming to organize handover operation, send acknowledge message, to respond said switching indication according to said switching indication; Base station BS is used for sending the switching indication to said MS, and receives the affirmation message that said MS sends.
On the one hand, the embodiment of the invention also provides the mobile station MS of a kind of half-duplex frequency division duplex H-FDD, comprising again: the message sink module is used to receive the switching indication that base station BS sends; Confirm module, the switching indication that is used for receiving according to said message sink module confirms to organize handover operation; Confirm sending module, be used for after said affirmation module confirms to organize handover operation, sending acknowledge message, to respond said switching indication to said BS.
On the one hand, the embodiment of the invention also provides a kind of base station BS, comprising again: message transmission module is used for sending the switching indication to the mobile station MS of half-duplex frequency division duplex H-FDD; Confirm receiver module, be used to receive the affirmation message that said MS sends.
Compared with prior art; The embodiment of the invention has the following advantages: through the embodiment of the invention; BS comes instruct MS to organize handover operation through switching indication; Thereby a kind of MS is provided the mechanism of not switching between on the same group in BS service, can have supported not the handover operation on the same group between of MS in the BS service.
Description of drawings
Fig. 1 is the frame structure sketch map of the H-FDD subscriber station of prior art after dividing into groups;
Fig. 2 is the flow chart of the indicating means of embodiment of the invention group switching;
Fig. 3 is the structure chart of the indication mechanism of embodiment of the invention group switching.
Embodiment
The embodiment of the invention provides a kind of group of indicating means that switches; BS indicates instruct MS to organize handover operation through sending to switch; Thereby a kind of MS is provided the mechanism of not switching between on the same group in BS service, can have supported not the handover operation on the same group between of MS in the BS service.
As shown in Figure 2, the flow chart of the indicating means that switches for embodiment of the invention group specifically may further comprise the steps:
Step S201, MS receive the switching indication that BS sends.When needs were organized handover operation, BS sent to MS and switches indication, organizes handover operation with instruct MS.
Step S202, after confirming to organize handover operation according to the switching indication, MS sends acknowledge message to BS, should the switching indication with response.After the switching indication that receives the BS transmission, MS will organize handover operation according to this switching indication affirmation, and then this MS sends acknowledge message to BS, is somebody's turn to do with response and switches indication, makes BS learn that this MS has received the switching indication.
Preferably, send the switching indication at BS to MS, instruct MS is organized after the switching; The switching behavior possibility success of MS or failure are (for example: when MS can't resolve the MAP assignment of another group; Handoff failure), therefore, whether MS need clearly notify the BS handover operation successful.
In embodiments of the present invention, BS is when sending the switching indication to MS, for MS distributes first code element and second code element, for example: CQI sign indicating number 1 and CQI sign indicating number 2.Certainly, also first code element and second code element can be set in advance and be kept among the MS.Behind the MS handover success, MS feeds back first code element in the quick feedback district of new group to BS, for example: CQI sign indicating number 1, to report the BS handover success, after BS received first code element of MS feedback, the resource of distributing for MS later on will be in new group; If the MS handoff failure then returns former group, feed back second code element to BS, for example: CQI sign indicating number 2, to report the BS handoff failure, after BS received, the resource of distributing for MS later on will be still in former group.
The embodiment of the invention one, BS sends unicast messages Group_Switch_REQ to MS, organizes handover operation to indicate this MS.After receiving this message; MS decodes to this message, learns that BS with oneself switching to other one group, confirms oneself will organize handover operation; Then this MS confirms to up unicast messages Group_Switch_RSP of BS transmission, to respond this unicast messages.Wherein, BS is as shown in table 1 to the unicast messages Group_Switch_REQ that MS sends, and MS is as shown in table 2 to the up unicast messages Group_Switch_RSP that BS sends.
Table 1
| Grammer (Syntax) | Length (bit) | Remarks |
| Group_Switch_REQ(){ | - | - |
| Management?Message?Type＝xxx | 8 | - |
| ?Transaction?ID | 16 | The unique identification of this time handling |
| } | ? | ? |
Table 2
| Grammer (Syntax) | Length (bit) | Remarks |
| Group_Switch_RSP(){ | - | - |
| Management?Message?Type＝xxx | 8 | - |
| Transaction?ID | 16 | With identical among the Group_Switch_REQ |
| } | ? | ? |
The embodiment of the invention two, BS sends broadcast Group_Switch_ADV to MS, organizes handover operation with instruct MS.Group_Switch_ADV message uses broadcasting CID (Connection Identification, connection identifier) to carry out assignment in MAP, guarantees that all MS can listen to.After receiving this message; MS decodes to this message; Discovery has the Basic CID of oneself, learns that BS with oneself switching to other one group, confirms oneself will organize handover operation; Then this MS confirms to up unicast messages Group_Switch_RSP of BS transmission, to respond this broadcast.Wherein, BS is as shown in table 3 to the broadcast Group_Switch_ADV that MS sends, and MS is as shown in table 2 to the up unicast messages Group_Switch_RSP that BS sends.
Table 3
| Grammer (Syntax) | Length (bit) | Remarks |
| Group_Switch_ADV(){ | - | - |
| Management?Message?Type＝xxx | 8 | - |
| No.of?Basic?CID | 8 | - |
| for(i＝0；i＜No.of?Basic?CID；i++){ | ? | ? |
| Basic?CID | 16 | If MS’s Basic CID is included in this message， MS should perform group switching. |
| } | ? | ? |
| } | ? | ? |
The embodiment of the invention three, BS is provided with the reservation IE (Infomation Element, cell) in the MAP message, organizes handover operation with instruct MS.After will organizing handover operation based on this MAP message authentication, MS sends a up unicast messages Group_Switch_RSP to BS and confirms, to respond this MAP message.Wherein, the form of the reservation cell that BS is provided with is as shown in table 4, and MS is as shown in table 2 to the up unicast messages Group_Switch_RSP that BS sends.
Table 4
| Grammer (Syntax) | Length (bit) | Remarks |
| Group_Switch_ADV_IE(){ | - | ?- |
| Extended?DIUC | 4 | ?xx |
| Length | 4 | ? |
| No.of?Basic?CID | 8 | ?- |
| for(i＝0；i＜No.of?Basic?CID；i++){ | ? | ? |
| ?Basic?CID | 16 | If MS’s Basic CID is included in this message， MS should perform group switching. |
| } | ? | ? |
| } | ? | ? |
The embodiment of the invention four, when needs switched MS in batches, BS sent the switching indication multicast management message of carrying probability parameter to all MS of BS service, to announce probability parameter to all MS.After receiving this switching indication, MS generates a random number through random algorithm, then this random number is compared with the probability parameter of BS broadcasting, confirms whether to organize handover operation.For example: the probability parameter of BS bulletin is 0.8, and the random number that MS generates is x, and x is between 0 and 1, if x >=0.8, then MS will organize handover operation; Otherwise be retained in original group.The form of the probability parameter of BS bulletin is as shown in table 5.
After confirming to organize handover operation, MS sends bandwidth request at the distance measurement zone of new group, to insert new group.
Table 5
| Grammer (Syntax) | Length (bit) | Remarks |
| Group_Switch_Para_ADV(){ | - | - |
| Management?Message?Type＝xxx | 8 | xx |
| Probability | 8 | 1～0x64：probability?of?stay?in?original?group. |
| } | ? | ? |
The embodiment of the invention five, when needs switched MS in batches, BS was provided with the reservation cell in the MAP message, carried the probability parameter to all MS bulletins in the cell.After this cell in receiving MAP message, MS generates a random number through random algorithm, then this random number is compared with the probability parameter of BS broadcasting, confirms whether to organize handover operation.For example: the probability parameter of BS bulletin is 0.8, and the random number that MS generates is x, and x is between 0 and 1, if x >=0.8, then MS will organize handover operation; Otherwise be retained in original group.The form of the probability parameter of BS bulletin is as shown in table 6.
After confirming to organize handover operation, MS sends bandwidth request at the distance measurement zone of new group, to insert new group.
Table 6
| Grammer (Syntax) | Length (bit) | Remarks |
| Group_Switch_Para_IE(){ | - | - |
| Extended?DIUC | 4 | xx |
| Length | 4 | - |
| Probability | 8 | 1～0×64：probability?of stay?in?original?group. |
| } | ? | ? |
Above-mentioned group of indicating means that switches, BS comes instruct MS to organize handover operation through switching indication, thereby a kind of MS is provided the mechanism of not switching between on the same group in the BS service, can support not the handover operation on the same group between of MS in the BS service.
As shown in Figure 3, the structure chart of the indication mechanism of switching for embodiment of the invention group comprises: mobile station MS 1, and be used for receiving and switch indication, according to switching after indication confirms to organize handover operation, send acknowledge message, should switch indication with response; Base station BS 2 is used for sending the switching indication to MS1, and receives the affirmation message that MS1 sends.
Wherein, MS1 comprises: message sink module 11 is used to receive the switching indication that BS2 sends; Confirm module 12, the switching indication that is used for receiving based on message sink module 11 confirms to organize handover operation; Confirm sending module 13, be used for after confirming that module 12 is confirmed to organize handover operation, sending acknowledge message, switch indication with response to BS2.
Wherein, confirm that module 12 comprises: random number generates submodule 121, is used for when switching is designated as the switch indicating information of carrying probability parameter, generating the random number between 0 and 1.
Wherein, confirm that module 12 also comprises: comparison sub-module 122 is used for the random number of probability parameter and 121 generations of random number generation submodule is compared, to confirm to organize handover operation.
Wherein, MS1 also comprises: request sending module 14 is used for after confirming that module 12 is confirmed to organize handover operation, sending bandwidth request at the new distance measurement zone of organizing to BS2, to insert new group.
Wherein, MS1 also comprises: code element identification module 15 is used for after message sink module 11 receives the switching indication of BS2 transmission, discerning first code element and second code element that this switching indication is carried.。
Wherein, MS1 also comprises: symbol feedback module 16, be used for when the success of group handover operation, feeding back first code element to BS2, and to report the BS2 handover success, perhaps, when the failure of group handover operation, feed back second code element to BS2, to report the BS2 handoff failure.
Wherein, base station BS 2 comprises: message transmission module 21 is used for sending the switching indication to mobile station MS 1; Confirm receiver module 22, be used to receive the affirmation message that MS1 sends.
Wherein, BS2 also comprises: cell is provided with module 23, is used for when switching is designated as MAP message cell, before message transmission module 21 is sent the MAP message, the reservation cell in the MAP message is set, with 1 group of handover operation of instruct MS.
Wherein, BS2 also comprises: symbol allocation module 24, and be used to MS1 and distribute first code element and second code element, and first code element and second code element are sent to message transmission module 21, send to MS1 by message transmission module 21.
The above-mentioned group of indication mechanism of switching, BS2 comes 1 group of handover operation of instruct MS through switching indication, thereby a kind of MS1 is provided the mechanism of not switching between on the same group in the BS2 service, can support not the handover operation on the same group between of MS1 in the BS2 service.
Through the description of above execution mode, those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential general hardware platform, can certainly pass through hardware, but the former is better execution mode under a lot of situation.Based on such understanding; The part that technical scheme of the present invention contributes to prior art in essence in other words can be come out with the embodied of software product; This computer software product is stored in the storage medium; Comprise some instructions with so that computer equipment (can be personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.
More than disclosedly be merely several specific embodiment of the present invention, still, the present invention is not limited thereto, any those skilled in the art can think variation all should fall into protection scope of the present invention.
Claims (14)
1. an indicating means of organizing switching is characterized in that, may further comprise the steps:
The mobile station MS of half-duplex frequency division duplex H-FDD receives the switching indication that base station BS sends;
After confirming to organize handover operation according to said switching indication, said MS sends acknowledge message to said BS, to respond said switching indication;
Said switching indication comprises: carry the broadcast management messages or the MAP message of probability parameter,
The said indication according to switching confirms that organizing handover operation comprises:
Said MS compares the random number of said probability parameter and said MS generation, to confirm to organize handover operation.
2. organize the indicating means that switches according to claim 1, it is characterized in that, after said MS confirmed to organize handover operation, said MS was in the distance measurement zone transmission bandwidth request of new group, to insert said new group.
3. organize the indicating means that switches according to claim 1, it is characterized in that, after said MS received the switching indication of BS transmission, also comprise: said MS discerned said switching and indicates first code element and second code element of carrying.
4. the indicating means that switches like said group of claim 3 is characterized in that, after said MS discerns first code element and second code element that said switching indication carries, also comprises:
When the success of group handover operation, said MS feeds back said first code element to said BS, to report said BS handover success;
When said group of handover operation failure, said MS feeds back said second code element to said BS, to report said BS handoff failure.
5. an indication mechanism of organizing switching is characterized in that, comprising:
The mobile station MS of half-duplex frequency division duplex H-FDD is used for receiving and switches indication, after confirming to organize handover operation according to said switching indication, sends acknowledge message, to respond said switching indication;
Said switching indication comprises: carry the broadcast management messages or the MAP message of probability parameter,
The said indication based on said switching confirms that organizing handover operation comprises:
Said MS compares said probability parameter and said MS generation random number, to confirm to organize handover operation;
Base station BS is used for sending the switching indication to said MS, and receives the affirmation message that said MS sends.
6. like said group of indication mechanism of switching of claim 5, it is characterized in that said MS comprises:
The message sink module is used to receive the switching indication that said BS sends;
Confirm module, the switching indication that is used for receiving according to said message sink module confirms to organize handover operation;
Confirm sending module, be used for after said affirmation module confirms to organize handover operation, sending acknowledge message, to respond said switching indication to said BS.
7. like said group of indication mechanism of switching of claim 5, it is characterized in that said BS comprises:
Message transmission module is used for sending the switching indication to said MS;
Confirm receiver module, be used to receive the affirmation message that said MS sends.
8. the mobile station MS of a half-duplex frequency division duplex H-FDD is characterized in that, comprising:
The message sink module is used to receive the switching indication that base station BS sends;
Confirm module, the switching indication that is used for receiving according to said message sink module confirms to organize handover operation;
Said affirmation module comprises:
Random number generates submodule, is used for when said switching is designated as the switch indicating information of carrying probability parameter, generates a random number;
Comparison sub-module is used for the random number of said probability parameter and the generation of said random number generation submodule is compared, to confirm to organize handover operation;
Confirm sending module, be used for after said affirmation module confirms to organize handover operation, sending acknowledge message, to respond said switching indication to said BS.
9. like the said MS of claim 8, it is characterized in that, also comprise: request sending module is used for after said affirmation module is confirmed to organize handover operation, sending bandwidth request at the new distance measurement zone of organizing to said BS, to insert said new group.
10. like the said MS of claim 8, it is characterized in that, also comprise: the code element identification module is used for after said message sink module receives the switching indication of BS transmission, discerning first code element and second code element that said switching indication is carried.
11. like the said MS of claim 10, it is characterized in that, also comprise: the symbol feedback module, be used for when the success of group handover operation, feeding back said first code element to said BS, to report said BS handover success, perhaps,
When said group of handover operation failure, feed back said second code element to said BS, to report said BS handoff failure.
12. a base station BS is characterized in that, comprising:
Message transmission module is used for sending the switching indication to the mobile station MS of half-duplex frequency division duplex H-FDD;
Confirm receiver module, be used to receive the affirmation message that said MS sends;
Said switching indication comprises: the broadcast management messages or the MAP message of carrying probability parameter;
Said MS sends before the acknowledge message, need confirm to organize handover operation according to said switching indication;
The said indication based on said switching confirms that organizing handover operation comprises:
Said MS compares said probability parameter and said MS generation random number, to confirm to organize handover operation.
13. like the said BS of claim 12; It is characterized in that; Also comprise: cell is provided with module, is used for when said switching is designated as mapping MAP message, before said message transmission module is sent said MAP message cell; Reservation cell in the said MAP message is set, organizes handover operation to indicate said MS.
14. like the said BS of claim 12; It is characterized in that, also comprise: the symbol allocation module is used to said MS and distributes first code element and second code element; And said first code element and second code element sent to said message transmission module, send to said MS by said message transmission module.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101882979A CN101453764B (en) | 2007-11-30 | 2007-11-30 | Indication method, system and apparatus for group handoff |
| PCT/CN2008/073203 WO2009074061A1 (en) | 2007-11-30 | 2008-11-26 | An indicating method and an indicating system for group handover and an apparatus thereof |
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|---|---|---|---|
| CN2007101882979A CN101453764B (en) | 2007-11-30 | 2007-11-30 | Indication method, system and apparatus for group handoff |
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| CN101453764B true CN101453764B (en) | 2012-07-04 |
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| US9560558B2 (en) * | 2014-05-16 | 2017-01-31 | Intel Corporation | Reduced handover latency for licensed shared access |
| CN106656605B (en) * | 2016-12-26 | 2020-03-20 | 腾讯科技（深圳）有限公司 | Method and device for realizing network scene simulation |
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| CN1941992A (en) * | 2005-09-26 | 2007-04-04 | 中兴通讯股份有限公司 | CDMA2000 access network service updating method based on packet |
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| JP4550887B2 (en) * | 2004-05-07 | 2010-09-22 | サムスン エレクトロニクス カンパニー リミテッド | System and method for performing high-speed handover in a broadband wireless access communication system |
| CN1960209A (en) * | 2005-10-31 | 2007-05-09 | 上海原动力通信科技有限公司 | Communication method and device under mode of frequency division duplexing |
| GB2434056B (en) * | 2006-01-10 | 2008-07-23 | Siemens Ag | A method of dual transfer mode handover |
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| CN1941992A (en) * | 2005-09-26 | 2007-04-04 | 中兴通讯股份有限公司 | CDMA2000 access network service updating method based on packet |
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| WO2009074061A1 (en) | 2009-06-18 |
| CN101453764A (en) | 2009-06-10 |
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