CN101087472B - Method for re-selecting cell of user device - Google Patents
Method for re-selecting cell of user device Download PDFInfo
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- CN101087472B CN101087472B CN2006100933292A CN200610093329A CN101087472B CN 101087472 B CN101087472 B CN 101087472B CN 2006100933292 A CN2006100933292 A CN 2006100933292A CN 200610093329 A CN200610093329 A CN 200610093329A CN 101087472 B CN101087472 B CN 101087472B
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Abstract
The invention relates to mobile communication filed, it discloses a method of user equipment reselecting area to make ratio of success that UE reselects HSDPA area increased. In the invention, service area sends adjacent message to UE which supports HSDPA, thereinto it includes capability parameter whether adjacent area support HSDPA, if UE judges there is adjacent area to support HSDPA based on capability parameter which supports HSDPA, the quality of signal of the adjacent area is measured, if the quality of signal of the adjacent area fulfills request, the adjacent area is reselected. When the quality of signal is required to preset threshold, if the number of adjacent area that quality of signal exceeds corresponding threshold is bigger or more than two, UE will reselects the adjacent area that quality of signal is the best.
Description
Technical field
The present invention relates to moving communicating field, particularly high speed downlink packet inserts (High SpeedDownlink Packet Access is called for short " HSDPA ") technology.
Background technology
Third generation partner program (3rd Generation Partnership Project, be called for short " 3GPP ") promoted the standardization effort of 3G (Third Generation) Moblie (The Third Generation is called for short " 3G ") technology as the vital tissue of moving communicating field.Along with the development of mobile communication technology, 3G technology is also in constantly development evolution.
In recent years, in the HSDPA and high speed uplink packet access (High Speed UplinkPacket Access is called for short " HSUPA ") of 3G system, all adopt the HARQ technology to carry out error control, improved systematic function.Wherein, HSUPA is called dedicated channel (the Enhanced DedicatedChannel of enhancing again, be called for short " E-DCH "), use the HARQ technology in the physical layer of E-DCH and retransmit fast, and improved the decoding performance of physical layer by the soft merging between first biography and the re-transmission.
In order to realize subscriber equipment (User Equipment, abbreviation " UE ") high-speed transfer of downlink data, HSDPA has increased two down physical channels and a uplink physical channel newly, they are respectively high-speed physical downlink shared channel (HS-PDSCH) (the High Speed Physical DownlinkShared Channel that is used for carrying user data, be called for short " HS-PDSCH "), be used to carry descending High-Speed Shared Control Channel (the High Speed Shared Control Channel of the required signaling of demodulation companion data channel HS-PDSCH, be called for short " HS-SCCH "), and the ACK/NACK and channel quality indication (the ChannelQuality Indicator that are used to carry UE, be called for short " CQI ") wait the up Dedicated Physical Control Channel (High Speed Dedicated Physical Control Channel, abbreviation " HS-DPCCH ") of feedback information (FBI).Base-station node (Node B) knows by HS-DPCCH whether data are correctly received, if incorrect, will initiate to retransmit, otherwise send new data.
HSDPA is Wideband Code Division Multiple Access (WCDMA) (Wideband Code Division Multiple Access, be called for short " WCDMA ") key property of technology the 5th edition, by adaptive modulation and coding (AdaptiveModulation and Coding, abbreviation " AMC "), HARQ, and the series of key techniques such as fast dispatch of Node B, realized descending high speed data transfer.
With dedicated channel (Dedicate Channel, be called for short " DCH ") compare, HSDPA has very big advantage: a plurality of UE in the sub-district can share all resources of HSDPA, wherein, the operable HS-PDSCH channel in each sub-district can reach 15 at most, and the spreading factor of the channel code that each channel uses is fixed as 16.The channel of these carrying data can be according to transfer of data demand and the residing channel circumstance of UE, distribute to each UE dynamically, synchronization also can be distributed to a plurality of UE to resource according to certain ratio, as shown in Figure 1, and can be so that the distribution of channel be more reasonable.
In addition, by using certain dispatching algorithm, system can also distribute more HS-PDSCH channel for the good UE of channel circumstance, so just can further improve the capacity of system; And for the DCH channel, system is necessary for each UE and distributes fixing resource, when certain UE does not have transfer of data, distributes to the resource of this UE can not be used by other UE, thereby causes the waste of resource.Therefore, very suitable those transfer of data demands of HSDPA technology have sudden, and data transmission delay requires lower non-real-time service, and the DCH technology then is fit to the real time business such as telephone conversation higher to the transfer of data delay requirement.
When the residing channel circumstance of UE is better, AMC function by HSDPA, system can adopt 16 quadrature amplitude modulations (Quadrature Amplitude Modulation, abbreviation " QAM ") modulation system, and use higher encoding rate, thereby improved 100% even more the acquisition high-speed data transmission, the relative DCH channel of the resource utilization of its channel code and power.If disposed 15 HS-PDSDCH channels in the sub-district, in theory, if when the residing channel circumstance of UE allows, the maximum data transfer rate of each UE can reach 13.976Mbps.Therefore, the HSDPA technology is the solution that the WCDMA down high-speed data inserts, and can effectively solve the limited problem of downlink capacity.
Although the HSDPA technology has plurality of advantages than the DCH technology, because operator's networking strategy difference in real network, exist the part sub-district to support the HSDPA channel, and the situation of HSDPA channel is not supported in the part sub-district.
In the prior art scheme, when a UE asks to set up in the sub-district when professional, system is in conjunction with the ability of sub-district, UE place, and according to the using priciple of channel type, for this UE distributes a kind of suitable channel type, comprising: common signal channel, DCH and HS-PDSCH.
When the common sub-district of not supporting HSDPA and HSDPA sub-district cover same physical region, system can be assigned to all data services on the HS-DSCH channel of HSDPA sub-district as much as possible, no matter still being the HSDPA sub-district from common sub-district, UE initiates reselection request, just the UE of two sub-districts can share the HSDPA resource of HSDPA sub-district, thereby obtains the better level of resources utilization.Wherein, UE is the gravity treatment that realizes HSDPA by directed retry, as shown in Figures 2 and 3.
When UE when place persistent district b initiates the calling of data service because sub-district b does not support HSDPA, but there is the alien-frequency district 2 with same coverage area in sub-district b, and HSDPA are supported in sub-district 2.Then radio network controller (Radio Network Controller, be called for short " RNC ") triggers a directed retry, this UE gravity treatment in sub-district 2, thereby provide high speed data transfer for this UE based on HS-DSCH.
In actual applications, there is following problem in such scheme: the UE gravity treatment is lower to the chance of success of HSDPA sub-district.
Cause the main cause of this situation to be, because the UE gravity treatment is the mode that adopts directed retry in the HSDPA sub-district, the prerequisite of its gravity treatment success be when UE when the Serving cell of not supporting HSDPA makes a call, there is a HSDPA sub-district that has same coverage area with this Serving cell, yet this is in real network under most of situation, because the HSDPA sub-district mainly is to cover and provide high-speed data service in order to satisfy focus, therefore can adopt littler radius of society, that is to say, under most of situation, the directed retry method can not effectively solve the assignment problem of data service to the HSDPA sub-district.Make the UE gravity treatment lower to the chance of success of HSDPA sub-district.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method of re-selecting cell of user device, makes the UE gravity treatment be improved to the chance of success of HSDPA sub-district.
For achieving the above object, the invention provides a kind of method of re-selecting cell of user device, comprise following steps:
Subscriber equipment receives the neighboring BS information that Serving cell issues to subscriber equipment, wherein comprises the ability parameter whether adjacent area supports that high speed downlink packet inserts;
If the subscriber equipment of supporting high speed downlink packet to insert judges have the adjacent area to support high speed downlink packet to insert according to the ability parameter of supporting high speed downlink packet to insert in the described neighboring BS information, this subscriber equipment is measured each neighboring cell signal quality of supporting high speed downlink packet to insert, in supporting the adjacent area that high speed downlink packet inserts, carry out gravity treatment, and reside in the selected adjacent area; If signal quality exceeds the adjacent area number of corresponding thresholding more than or equal to two, then this subscriber equipment gravity treatment is to the best adjacent area of signal quality;
If described subscriber equipment judges do not have the adjacent area to support high speed downlink packet to insert according to the ability parameter of supporting high speed downlink packet to insert in the described neighboring BS information, then all neighboring cell signal qualities are measured, lay equal stress on and choose the adjacent area that a signal quality satisfies demand on signal quality, wherein, preset thresholding if the described signal quality of adjacent cells of described subscriber equipment measurement gained exceeds, then this signal quality of adjacent cells satisfies demand on signal quality.
In this external described method, described adjacent area is the alien frequencies adjacent area of described Serving cell.
In this external described method, described Serving cell issues described neighboring BS information by Cell Broadcast CB.
In this external described method, the ability parameter that described high speed downlink packet inserts is the newly-increased parameter in the described neighboring BS information, and its value is: support, do not support.
In this external described method, described thresholding issues in the system message of described Serving cell.
In this external described method, the value of described thresholding between-20dB between the 0dB.
In this external described method, a described thresholding is set respectively at each adjacent area of described Serving cell;
Perhaps, all the adjacent area unifications at described Serving cell are provided with a described thresholding.
By relatively finding, the main distinction of technical scheme of the present invention and prior art is, Serving cell issues neighboring BS information to the UE that supports HSDPA, wherein comprise the adjacent area and whether support the ability parameter of HSDPA, if UE judges have the adjacent area to support HSDPA according to the ability parameter of supporting HSDPA, then this neighboring cell signal quality is measured, if this signal quality of adjacent cells satisfies demand on signal quality, then gravity treatment is to this adjacent area.Resident by the UE active gravity treatment of supporting HSDPA to sub-district with HSDPA ability, when UE initiates business, can directly set up HSDPA connects, make when effectively improving the system HSDPA channel utilization, avoid when the HSDPA service access, carrying out in the prior art time delay of HSDPA sub-district retry, improved systematic function.In addition, the present invention is not subjected to the restriction of real network layout, as long as there is the zone of HSDPA sub-district, UE initiatively gravity treatment has farthest improved the chance of success of gravity treatment to the HSDPA sub-district to appropriate H SDPA sub-district.
When demand on signal quality is that preset gate is prescribed a time limit, if signal quality exceeds the adjacent area number of corresponding thresholding more than or equal to two, then UE selects gravity treatment to the best adjacent area of signal quality, makes UE can independently select optimum HSDPA sub-district, has further improved service quality.
Owing at each adjacent area of Serving cell the thresholding of a signal quality is set respectively, therefore configuration-system parameter neatly improves the adaptive capacity of system.
Description of drawings
Fig. 1 is the HSDPA scheduling of resource schematic diagram between a plurality of UE in the prior art;
Fig. 2 is that HSDPA channel network schematic diagram is set up in UE directed retry request in the prior art;
Fig. 3 is that HSDPA channel network schematic diagram is set up in the UE directed retry in the prior art;
Fig. 4 is the UE re-selecting cell method flow diagram according to first embodiment of the invention;
Fig. 5 is the UE re-selecting cell network diagram according to first embodiment of the invention;
Fig. 6 is the UE re-selecting cell method flow diagram according to second embodiment of the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
Whether the present invention is by supporting the neighboring BS information of the ability parameter of HSDPA in its adjacent area of cell broadcast service of UE, UE judges according to the neighboring BS information of receiving, support the HSDPA adjacent area if exist, and this signal quality of adjacent cells satisfies demand on signal quality, and then UE selects the adjacent area of qualified signal quality optimum to carry out gravity treatment.
Wherein, demand on signal quality can have multiple mode, for example, for presetting thresholding, when signal quality exceeds this thresholding, then meets the requirements; Otherwise it is undesirable.Perhaps, signal quality continues to exceed default thresholding in certain duration T, then meet the requirements; Otherwise undesirable or the like mode.No matter in which kind of mode, demand on signal quality is handed down to UE in the system message of Serving cell.Be to preset the mode of thresholding with demand on signal quality below, UE re-selecting cell method of the present invention is described further.
The UE re-selecting cell method of first embodiment of the invention as shown in Figure 4, wherein, the network condition of UE re-selecting cell as shown in Figure 5, HSDPA is all supported in sub-district 2, sub-district 3 and sub-district 1, and sub-district b and sub-district a do not support HSDPA.Wherein, sub-district 1,2,3 all is the alien frequencies adjacent area of sub-district a.
In step 401, after supporting the UE access network of HSDPA, select a proper cell resident as Serving cell, and read this Serving cell by neighboring BS information that Cell Broadcast CB issued, wherein comprise the expression adjacent area and whether support the newly-increased parameter of the ability of HSDPA, its value is: support, do not support.The adjacent area here is meant the alien frequencies adjacent area of Serving cell.
In step 402, UE is known neighboring BS information by Cell Broadcast CB, wherein comprises the ability parameter of whether supporting HSDPA.For example, UE is known the adjacent area by Cell Broadcast CB after being linked among as shown in Figure 5 the sub-district a: sub-district 2, sub-district 3 and sub-district 1, and the HSDPA ability parameter of sub-district 2, sub-district 3 and sub-district 1 is support.
In step 403, UE measures the neighboring cell signal quality of supporting HSDPA, and the thresholding that presets of each neighboring cell signal quality issues in the system message of Serving cell, the value of thresholding between-20dB between the 0dB.Wherein, a thresholding is set respectively at each adjacent area of Serving cell, for example, the thresholding of sub-district 2 is-thresholding of 10dB, sub-district 3 is-1dB for the thresholding of-3dB, sub-district 1.In three adjacent areas of sub-district a, the signal quality that UE records sub-district 2, sub-district 3 and sub-district 1 is respectively-8dB ,-8dB and 5dB, wherein the signal quality of sub-district 2 and sub-district 1 has all exceeded default thresholding.
In step 404, UE carries out gravity treatment in the adjacent area of supporting HSDPA, and resides in the selected adjacent area.If signal quality exceeds the adjacent area number of corresponding thresholding more than or equal to two, then the UE gravity treatment is to the best adjacent area of signal quality.Make UE can independently select optimum HSDPA sub-district, further improved service quality.
Equally as above routine described, exceed thresholding and support in the sub-district 2 and sub-district 1 of HSDPA at signal quality, the signal quality optimum of sub-district 1, then UE is resident will be from sub-district a gravity treatment to sub-district 1.Process ends.Resident by the UE active gravity treatment of supporting HSDPA to sub-district with HSDPA ability, when UE initiates business, can directly set up HSDPA connects, make when effectively improving the system HSDPA channel utilization, avoid when the HSDPA service access, carrying out in the prior art time delay of HSDPA sub-district retry, improved systematic function.In addition, the present invention is not subjected to the restriction of real network layout, as long as there is the zone of HSDPA sub-district, UE initiatively gravity treatment has farthest improved the chance of success of gravity treatment to the HSDPA sub-district to appropriate H SDPA sub-district.
The UE re-selecting cell method of second embodiment of the invention as shown in Figure 6, wherein, the network condition of UE re-selecting cell equally as shown in Figure 5, but have only sub-district 2 and sub-district 3 to support HSDPA, and sub-district 1, sub-district a and sub-district b do not support HSDPA.
In step 602, UE has judged whether adjacent area support HSDPA according to the ability parameter of supporting HSDPA in the neighboring BS information, after UE is linked among as shown in Figure 5 the sub-district a, know the adjacent area by Cell Broadcast CB: sub-district 2, sub-district 3 and sub-district 1, and the HSDPA ability parameter of sub-district 2 and sub-district 3 is the HSDPA ability parameter of support, sub-district 1 for not supporting.
In step 603, UE measures the neighboring cell signal quality of supporting HSDPA, and judges whether this signal quality of adjacent cells exceeds and preset thresholding.Wherein, the thresholding that presets of each neighboring cell signal quality issues in the system message of Serving cell, the value of thresholding between-20dB between the 0dB.Can a thresholding be set at all adjacent area unifications of Serving cell, for example unified thresholding that is provided with is-10dB, and UE records the signal quality of sub-district 2 and sub-district 3 and is respectively-12dB ,-15dB.Because in the adjacent area of supporting HSDPA, do not have neighboring cell signal quality to exceed thresholding, therefore, UE does not carry out gravity treatment in these adjacent areas.
In step 604, UE carries out normal cell re-selection procedure, if there is the new sub-district of satisfying the normal cell reselection conditions, then gravity treatment is to this new sub-district.Process ends.
In the above-described embodiment, if adopt the thresholding that a signal quality is set respectively at each adjacent area of Serving cell, configuration-system parameter neatly then improves the adaptive capacity of system; If adopt the thresholding that a signal quality is set at each adjacent area unification of Serving cell, then the system of the judgement of carrying out thresholding that need dispose of UE and comparison is comparatively simple.This dual mode respectively has pluses and minuses, in practice, can select according to the needs of network and UE design.
In addition, if support the ability parameter of HSDPA to judge do not have the adjacent area to support HSDPA in according to neighboring BS information as UE, then can carry out the sub-district gravity treatment according to prior art.That is, UE measures all adjacent areas (not supporting HSDPA's) signal quality, if there are one or more signal quality of adjacent cells to satisfy demand on signal quality, then the wherein adjacent area of signal quality optimum is arrived in gravity treatment.
Though pass through with reference to some of the preferred embodiment of the invention, the present invention is illustrated and describes, but those of ordinary skill in the art should be understood that and can do various changes to it in the form and details, and without departing from the spirit and scope of the present invention.
Claims (7)
1. the method for a re-selecting cell of user device is characterized in that, comprises following steps:
Subscriber equipment receives the neighboring BS information that Serving cell issues to subscriber equipment, wherein comprises the ability parameter whether adjacent area supports that high speed downlink packet inserts;
If the subscriber equipment of supporting high speed downlink packet to insert judges have the adjacent area to support high speed downlink packet to insert according to the ability parameter of supporting high speed downlink packet to insert in the described neighboring BS information, then this subscriber equipment is measured each neighboring cell signal quality of supporting high speed downlink packet to insert, in supporting the adjacent area that high speed downlink packet inserts, carry out gravity treatment, and reside in the selected adjacent area; If signal quality exceeds the adjacent area number of corresponding thresholding more than or equal to two, then this subscriber equipment gravity treatment is to the best adjacent area of signal quality;
If described subscriber equipment judges do not have the adjacent area to support high speed downlink packet to insert according to the ability parameter of supporting high speed downlink packet to insert in the described neighboring BS information, then all neighboring cell signal qualities are measured, lay equal stress on and choose the adjacent area that a signal quality satisfies demand on signal quality, wherein, preset thresholding if the described signal quality of adjacent cells of described subscriber equipment measurement gained exceeds, then this signal quality of adjacent cells satisfies demand on signal quality.
2. the method for re-selecting cell of user device according to claim 1 is characterized in that, described adjacent area is the alien frequencies adjacent area of described Serving cell.
3. the method for re-selecting cell of user device according to claim 2 is characterized in that, described Serving cell issues described neighboring BS information by Cell Broadcast CB.
4. the method for re-selecting cell of user device according to claim 2 is characterized in that, the ability parameter that described high speed downlink packet inserts is the newly-increased parameter in the described neighboring BS information, and its value is: support, do not support.
5. the method for re-selecting cell of user device according to claim 4 is characterized in that, described thresholding issues in the system message of described Serving cell.
6. the method for re-selecting cell of user device according to claim 4 is characterized in that, the value of described thresholding between-20dB between the 0dB.
7. according to the method for each described re-selecting cell of user device in the claim 2 to 6, it is characterized in that, a described thresholding is set respectively at each adjacent area of described Serving cell;
Perhaps, all the adjacent area unifications at described Serving cell are provided with a described thresholding.
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Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101466118B (en) * | 2007-12-18 | 2012-06-20 | 上海华为技术有限公司 | Method for indicating neighbour zone information and network side equipment |
| CN101232730B (en) * | 2008-02-27 | 2010-12-29 | 中兴通讯股份有限公司 | Method for mobile equipment to priority select HSDPA district |
| CN101651858B (en) * | 2008-08-15 | 2012-10-17 | 华为技术有限公司 | Method and system for issuing message, method and device for receiving sent message |
| CN101730164B (en) * | 2008-10-17 | 2013-04-24 | 上海华为技术有限公司 | Method and terminal for reselecting cell |
| US9148831B2 (en) | 2008-11-14 | 2015-09-29 | Qualcomm Incorporated | GPS-assisted cell selection for mobile devices |
| CN102056269B (en) * | 2009-11-02 | 2014-04-02 | 华为技术有限公司 | Function controlling and processing method, device and system |
| CN102469480B (en) * | 2010-11-10 | 2016-05-25 | 中兴通讯股份有限公司 | The Radio Resource control and management method and system of optimizing |
| CN102076012B (en) * | 2011-01-18 | 2016-08-03 | 中兴通讯股份有限公司 | Neighboring BS information processing method, switching instruction method, terminal and base station |
| CN102413521A (en) * | 2011-11-10 | 2012-04-11 | 电信科学技术研究院 | Method of mobility management, system thereof and device thereof |
| WO2015139666A1 (en) * | 2014-03-21 | 2015-09-24 | Mediatek Singapore Pte. Ltd. | Cell selection and reselection for low cost machine-type communication ue |
| BR112017001764A2 (en) * | 2014-07-30 | 2018-02-14 | Nokia Solutions & Networks Oy | method and apparatus |
| CN105376820B (en) * | 2014-08-15 | 2020-02-07 | 中兴通讯股份有限公司 | Cell selection method and device |
| CN104918303B (en) * | 2015-06-12 | 2019-01-15 | 联想(北京)有限公司 | mobile terminal device and control method |
| CN111226461A (en) * | 2018-01-19 | 2020-06-02 | Oppo广东移动通信有限公司 | Cell reselection method, device and system |
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