CN101365225B - Cell selection method, system, base station and user equipment implementing cell selection - Google Patents
Cell selection method, system, base station and user equipment implementing cell selection Download PDFInfo
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- CN101365225B CN101365225B CN2007101200289A CN200710120028A CN101365225B CN 101365225 B CN101365225 B CN 101365225B CN 2007101200289 A CN2007101200289 A CN 2007101200289A CN 200710120028 A CN200710120028 A CN 200710120028A CN 101365225 B CN101365225 B CN 101365225B
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Abstract
The invention discloses a cell selection method which comprises the following steps: a network side notifies user equipment of the information of occupied code resources in various cells; and the user equipment selects a target cell according to the channel quality and the information of occupied code resources in each cell. Besides, the invention further discloses a system for cell selection, which comprises network side equipment used for notifying the user equipment of the information of occupied code resources in each cell, and the user equipment used for selecting the target cell according to the channel quality and the information of occupied code resources in each cell. The technical scheme can increase the rate of success in cell access or cell switch.
Description
Technical field
The present invention relates to the communication technology, relate in particular to a kind of method of cell selecting, system, base station and the subscriber equipment of realization cell selecting.
Background technology
In the communication system, when inserting in the sub-district, UE is according to the channel quality of measured sub-district, and access procedure is initiated in the measured sub-district of selective channel matter; When switching in the sub-district, UE also can be according to the channel quality of measured sub-district, and handoff procedure is initiated in the measured sub-district of selective channel matter, is UE assigned code resource in this sub-district by network side afterwards.
Wherein, in the access procedure, when network side is UE assigned code resource in this sub-district, the resource of finding this sub-district sometimes is not enough, then may directly refuse the access of this UE this moment, perhaps can go to attempt in other sub-district being UE assigned code resource, thereby the success rate that causes inserting reduces, and turn-on time is elongated.In like manner, in the time of switching in, when network is surveyed and be UE assigned code resource in the adjacent area, sometimes the resource that also can find this sub-district is not enough, then may cause handoff failure this moment, perhaps can go to attempt in other sub-district switching once more, thereby cause success rate for switching to reduce, and switching time is elongated.
Summary of the invention
In view of this, provide a kind of method of cell selecting among the present invention on the one hand, a kind of system, base station and subscriber equipment of realizing cell selecting is provided on the other hand, insert or success rate for switching so that improve the sub-district.
The method of cell selecting provided by the invention comprises:
Network side is notified to subscriber equipment with the occupied information of each cell code resource;
Subscriber equipment is selected the purpose sub-district according to the channel quality of each sub-district and the occupied information of sign indicating number resource;
Wherein, the occupied information of described sign indicating number resource comprises: the current and/or trend occupied information of sign indicating number resource;
Described subscriber equipment is according to the channel quality and the sign indicating number resource occupation information of each sub-district, select the purpose sub-district to be: current and/or trend occupied information is determined vacant yard resource of current and/or trend of each sub-district according to the sign indicating number resource of each sub-district, the channel quality of each sub-district and the current and/or vacant sign indicating number of trend resource are computed weighted, choose the more excellent sub-district of weighted results as the purpose sub-district.
Preferably, this method further comprises: when initial the access, initiate the sub-district access procedure at described purpose sub-district;
Perhaps this method further comprises: when switching in the sub-district, initiate cell switch process at described purpose sub-district.
Wherein, described network side is notified to subscriber equipment with the occupied information of each cell code resource: radio network controller sends a sign indicating number resource occupation information broadcast Indication message to the base station, and broadcast away the occupied information of each cell code resource according to described Indication message the base station by broadcast;
Perhaps being: makes decisions on one's own the occupied information of each cell code resource is broadcasted away by broadcast in the base station.
Wherein, described broadcast is: the existing broadcast of system perhaps is: newly-increased broadcast.
Wherein, the occupied information periodic broadcast of described sign indicating number resource, or broadcasting when upgrading.
Wherein, carry the occupied information of each cell code resource in the described Indication message.
Wherein, the occupied information of described sign indicating number resource is by the expression of bit sign.
Preferably, described to each sub-district channel quality and before the current and/or vacant sign indicating number of trend resource computes weighted, further comprise: according to the current of each cell code resource and/or trend occupied information, determine the sub-district that vacant sign indicating number resource satisfies the subscriber equipment resource requirement, from determined sub-district, carry out described channel quality and operation current and/or that the vacant sign indicating number of trend resource computes weighted each sub-district.
From such scheme as can be seen, network side is notified to UE with the occupied information of each cell code resource among the present invention,, is selected the purpose sub-district, and initiates sub-district access procedure or cell switch process according to the channel quality of each sub-district and the occupied information of sign indicating number resource by UE.Thereby UE is inserted or have more independence when switching, and owing to insert or tentatively considered when switching the situation that takies of resource, make and insert or success rate for switching is improved.
Further, network side is also corresponding has reduced because the number of retries that the resource allocation failure causes has shortened the access duration and switched duration.
Description of drawings
Fig. 1 is the exemplary process diagram of the method for cell selecting in the embodiment of the invention;
Fig. 2 is the exemplary block diagram that realizes the system of cell selecting in the embodiment of the invention;
Fig. 3 is the cut-away view of Node B in the embodiment of the invention;
Fig. 4 is the cut-away view of UE in the embodiment of the invention.
Embodiment
In the embodiment of the invention, network side is notified to subscriber equipment with the occupied information of each cell code resource; Subscriber equipment is selected the purpose sub-district according to the channel quality of each sub-district and the occupied information of sign indicating number resource.
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment and accompanying drawing, the present invention is described in more detail.
Fig. 1 is the exemplary process diagram of the method for cell selecting in the embodiment of the invention.As shown in Figure 1, this flow process comprises the steps:
In this step, during specific implementation, the radio network controller (RNC) that can be network side sends sign indicating number resource occupation information broadcast Indication message to base station (Node B), and Node B broadcasts away the occupied information of each cell code resource according to the Indication message that is received by broadcast; Perhaps, also can be to make decisions on one's own the occupied information of each cell code resource is broadcasted away by broadcast in the base station of network side.
Wherein, because RNC is responsible for the UE Resources allocation, and the resource of being distributed is indicated to NodeB, therefore RNC and Node B can be known the distribution condition of each cell code resource, it is the occupied information that RNC and Node B can obtain each cell code resource, so can carry the occupied information of each cell code resource in the Indication message, also can be a notification message that does not carry the occupied information of cell code resource.
In addition, the occupied information of sign indicating number resource can comprise: the current occupied information of sign indicating number resource, and/or, the trend occupied information of sign indicating number resource.Wherein, the trend occupied information of sign indicating number resource can obtain the situation that takies of following special time period ISN resource according to business model or statistical information analysis, for example, for the business district, taking of the timing code that may work by day resource is more, and for the residential area, taking of possible sign indicating number resource more etc. the quitting time in the evening.
In addition, above-mentioned broadcast can be the existing broadcast of system, then can increase the indication field of sign indicating number resource occupation information in this existing broadcast.Perhaps above-mentioned broadcast can be the broadcast that increases newly also, and carries the indication field of the sign indicating number resource occupation information of each sub-district of indication.
Wherein, indication field can be a bit sign, is used for correspondingly with yard resource, and current and/or trend is occupied to indicate which yard resource, which yard resource is current and/or trend is unoccupied; Perhaps indication field is used for the percentage of the current and/or trend occupied information of indication code resource, or the capacity of vacant resource etc.
In this step, the occupied information of sign indicating number resource can periodic broadcast, also can be broadcasting etc. when upgrading.When carrying out periodic broadcast, cycle duration can be chosen according to actual needs, for example can be 200 milliseconds, or 1 second etc.
During this step specific implementation, can comprise following two kinds of methods at least:
Method one: set in advance quality threshold, determine that channel quality satisfies pre-conditioned sub-district, current and/or the trend of access code resource takies lower sub-district as the purpose sub-district from determined sub-district, for example, can be with the sign indicating number resource current and/or trend take minimum or inferior low sub-district as the purpose sub-district.
Further, can also carry out the selection of purpose sub-district according to the UE resource requirement, wherein, the UE resource requirement can be that UE carries out Radio Resource required resource when connecting (RRC) during access, also can be UE required resource and required resource of follow-up business when carrying out RRC.During switching, the UE resource requirement then is that the RRC of UE connects and all professional required resources.
At this moment, can be before definite channel quality satisfies pre-conditioned sub-district, according to the current of each cell code resource and/or trend occupied information, determine the sub-district that vacant sign indicating number resource satisfies the subscriber equipment resource requirement, in vacant sign indicating number resource satisfies the sub-district of subscriber equipment resource requirement, determine that channel quality satisfies pre-conditioned sub-district, afterwards channel quality greater than the sub-district of default quality threshold in the current and/or trend of access code resource take lower sub-district as the purpose sub-district; Perhaps, also can be after the definite sub-district of channel quality greater than quality threshold, according to the current of each cell code resource and/or trend occupied information, satisfy the sub-district of determining in the pre-conditioned sub-district that vacant sign indicating number resource satisfies the subscriber equipment resource requirement at channel quality, afterwards, satisfy in the sub-district of subscriber equipment resource requirement the current and/or trend of access code resource in vacant sign indicating number resource and take lower sub-district as the purpose sub-district.
Wherein, for the sub-district access procedure, pre-conditioned can perhaps be its special condition for surpassing the thresholding of setting; For handoff procedure, pre-conditionedly can be switching condition based on radio signal quality, the radio signal quality that this switching condition is generally the adjacent area surpasses the thresholding of setting than local area wireless signal, and specifically the switching condition based on wireless signal also has other kind, gives unnecessary details no longer one by one herein.
Method two: current and/or trend occupied information is determined the vacant sign indicating number of the current and/or trend resource of each sub-district according to the sign indicating number resource of each sub-district, the channel quality of each sub-district and the current and/or vacant sign indicating number of trend resource are computed weighted, choose the more excellent sub-district of weighted results as the purpose sub-district, for example can be with weighted value maximum or inferior big sub-district as the purpose sub-district.
Equally, also can further carry out the selection of purpose sub-district according to the UE resource requirement, before promptly the channel quality of each sub-district and the current and/or vacant sign indicating number of trend resource being computed weighted, according to the current of each cell code resource and/or trend occupied information, determine the sub-district that vacant sign indicating number resource satisfies the subscriber equipment resource requirement, from determined sub-district, carry out described channel quality and operation current and/or that the vacant sign indicating number of trend resource computes weighted each sub-district.
Wherein, when initially inserting, the purpose sub-district is: desire inserts the sub-district; When switched the sub-district, the purpose sub-district was: the Target cell that desire is switched.
The specific implementation process of this step can be consistent with prior art.Wherein, when initially inserting, UE initiates the sub-district access procedure and is: UE initiates the sub-district and inserts request; When switched the sub-district, UE initiates the sub-district access procedure and is: UE initiated the sub-district handoff request.
Above-mentioned method to the cell selecting in the embodiment of the invention is described in detail, the system that realizes cell selecting is described in detail below again.
Fig. 2 shows the exemplary block diagram of the system that realizes cell selecting.As shown in Figure 2, this system comprises: network equipment and UE.
Wherein, network equipment is used for the occupied information of each cell code resource is notified to subscriber equipment.
Subscriber equipment is used for the occupied information according to the channel quality of each sub-district and sign indicating number resource, selects the purpose sub-district.
During specific implementation, network equipment can include only Node B, and promptly the Node B occupied information of making decisions on one's own each cell code resource is notified to subscriber equipment; Perhaps network equipment comprises RNC and NodeB.
Wherein, RNC is used for sending sign indicating number resource occupation information broadcast Indication message to the base station.
Node B is used to receive the sign indicating number resource occupation information broadcast Indication message from radio network controller, according to described Indication message the occupied information of each cell code resource is notified to subscriber equipment by broadcast.
During specific implementation, the cut-away view of Node B can comprise a yard resource occupation information broadcast module as shown in Figure 3, is used for the occupied information of each cell code resource is notified to subscriber equipment.
In addition, also can comprise the Indication message receiver module, be used to receive sign indicating number resource occupation information broadcast Indication message, described Indication message is offered a yard resource occupation information broadcast module from radio network controller; Sign indicating number resource occupation information broadcast module is carried out the operation that described occupied information with each cell code resource is notified to subscriber equipment according to this Indication message.
UE can comprise when specific implementation as shown in Figure 4: the cell selecting module is used for selecting the purpose sub-district according to the channel quality of each sub-district and the occupied information of sign indicating number resource.
Further, this UE can also comprise: request sending module, be used for purpose sub-district at the selection of cell selecting module, and initiate sub-district access procedure or cell switch process.
Each component in this system and the specific operation process of each component internal module can be consistent with the operating process described in the method flow shown in Figure 1, give unnecessary details no longer one by one herein.
Above-described specific embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the above only is preferred embodiment of the present invention; be not to be used to limit protection scope of the present invention; within the spirit and principles in the present invention all, 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 method for a cell selecting is characterized in that, this method comprises:
Network side is notified to subscriber equipment with the occupied information of each cell code resource;
Subscriber equipment is selected the purpose sub-district according to the channel quality of each sub-district and the occupied information of sign indicating number resource;
Wherein, the occupied information of described sign indicating number resource comprises: the current and/or trend occupied information of sign indicating number resource;
Described subscriber equipment is according to the channel quality and the sign indicating number resource occupation information of each sub-district, select the purpose sub-district to be: current and/or trend occupied information is determined vacant yard resource of current and/or trend of each sub-district according to the sign indicating number resource of each sub-district, the channel quality of each sub-district and the current and/or vacant sign indicating number of trend resource are computed weighted, choose the more excellent sub-district of weighted results as the purpose sub-district.
2. the method for claim 1 is characterized in that, this method further comprises: when initial the access, initiate the sub-district access procedure at described purpose sub-district;
Perhaps this method further comprises: when switching in the sub-district, initiate cell switch process at described purpose sub-district.
3. the method for claim 1, it is characterized in that, described network side is notified to subscriber equipment with the occupied information of each cell code resource: radio network controller sends a sign indicating number resource occupation information broadcast Indication message to the base station, and broadcast away the occupied information of each cell code resource according to described Indication message the base station by broadcast;
Perhaps being: makes decisions on one's own the occupied information of each cell code resource is broadcasted away by broadcast in the base station.
4. method as claimed in claim 3 is characterized in that, described broadcast is: the existing broadcast of system perhaps is: newly-increased broadcast.
5. method as claimed in claim 3 is characterized in that, the occupied information periodic broadcast of described sign indicating number resource, or broadcasting when upgrading.
6. method as claimed in claim 3 is characterized in that, carries the occupied information of each cell code resource in the described Indication message.
7. the method for claim 1 is characterized in that, the occupied information of described sign indicating number resource is by the expression of bit sign.
8. the method for claim 1, it is characterized in that, described to each sub-district channel quality and before the current and/or vacant sign indicating number of trend resource computes weighted, further comprise: according to the current of each cell code resource and/or trend occupied information, determine the sub-district that vacant sign indicating number resource satisfies the subscriber equipment resource requirement, from determined sub-district, carry out described channel quality and operation current and/or that the vacant sign indicating number of trend resource computes weighted each sub-district.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101200289A CN101365225B (en) | 2007-08-07 | 2007-08-07 | Cell selection method, system, base station and user equipment implementing cell selection |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007101200289A CN101365225B (en) | 2007-08-07 | 2007-08-07 | Cell selection method, system, base station and user equipment implementing cell selection |
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| Publication Number | Publication Date |
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| CN101365225A CN101365225A (en) | 2009-02-11 |
| CN101365225B true CN101365225B (en) | 2011-07-27 |
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| CN2007101200289A Expired - Fee Related CN101365225B (en) | 2007-08-07 | 2007-08-07 | Cell selection method, system, base station and user equipment implementing cell selection |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101588605B (en) * | 2009-06-24 | 2011-05-04 | 华为技术有限公司 | Method for dispatching multi-carrier cells and network device |
| WO2015042804A1 (en) * | 2013-09-25 | 2015-04-02 | 华为技术有限公司 | Handover method and device |
| CN107708177A (en) * | 2016-08-09 | 2018-02-16 | 北京信威通信技术股份有限公司 | A kind of method and device of mobile terminal access |
| CN108092750B (en) * | 2016-11-22 | 2020-05-15 | 中国移动通信有限公司研究院 | Data retransmission method and device |
| CN108901059B (en) * | 2018-08-14 | 2020-10-09 | 厦门美图移动科技有限公司 | Base station cell selection method and device |
| CN112399563B (en) * | 2019-08-13 | 2023-09-26 | 成都华为技术有限公司 | Resource allocation method and device in symbiotic network |
| CN113177697A (en) * | 2021-04-09 | 2021-07-27 | 深圳市广和通无线股份有限公司 | Cell access method, device, computer equipment and storage medium |
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| US5535425A (en) * | 1994-03-01 | 1996-07-09 | Fujitsu Limited | Channel switching control in mobile telecommunication system |
| CN1416231A (en) * | 2001-10-29 | 2003-05-07 | 华为技术有限公司 | Method for broadcasting system information wireless packed data transmission |
| CN1744753A (en) * | 2004-09-02 | 2006-03-08 | 大唐移动通信设备有限公司 | Selecting method of switching target community in TDD/CDMA system |
| CN1753558A (en) * | 2004-09-24 | 2006-03-29 | 华为技术有限公司 | Method of controlling user terminal selection cell in radio communication system |
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2007
- 2007-08-07 CN CN2007101200289A patent/CN101365225B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5535425A (en) * | 1994-03-01 | 1996-07-09 | Fujitsu Limited | Channel switching control in mobile telecommunication system |
| CN1416231A (en) * | 2001-10-29 | 2003-05-07 | 华为技术有限公司 | Method for broadcasting system information wireless packed data transmission |
| CN1744753A (en) * | 2004-09-02 | 2006-03-08 | 大唐移动通信设备有限公司 | Selecting method of switching target community in TDD/CDMA system |
| CN1753558A (en) * | 2004-09-24 | 2006-03-29 | 华为技术有限公司 | Method of controlling user terminal selection cell in radio communication system |
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Granted publication date: 20110727 Termination date: 20210807 |