CN1155179C - Fast small region choosing method based on QoS judge creterion - Google Patents
Fast small region choosing method based on QoS judge creterion Download PDFInfo
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- CN1155179C CN1155179C CNB011129603A CN01112960A CN1155179C CN 1155179 C CN1155179 C CN 1155179C CN B011129603 A CNB011129603 A CN B011129603A CN 01112960 A CN01112960 A CN 01112960A CN 1155179 C CN1155179 C CN 1155179C
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Abstract
The present invention relates to a fast cell choosing method based on QoS judging criteria. When UE is used for measuring each effectively concentrated cell, the signal-noise rates of common pilot channels are measured; a cell which satisfies the set target values of the signal-noise rates of the common pilot channels and has the smallest transmission power is chosen as a preferable cell; if the cell which satisfies a requirement does not exist, the number of service cells is added according to the magnitude of receiving the signal-to-noise rates of the common pilot channels by the cells until the received common pilot channels are merged for satisfying all target values of the smallest signal-to-noise rate in the common pilot channels; a plurality of chosen cells together serve the UE through each high-speed shared channel. The present invention can achieve the goals of reducing systemic downlink interference and increasing systemic capacity.
Description
Technical field
The present invention relates to a kind of fast cell selection method, relate in particular to a kind of fast cell selection method based on the service quality judgment criterion.
Background technology
The Chinese invention patent application publication number is CN1115555A disclosed " in a cdma system transmission power control method and use the mobile radio station of this method ", be through-put power control bit that comes by older base station during soft handover and the through-put power control bit that comes from new base station and the through-put power control bit than low transmission power of selecting this mobile radio station of indication, this mobile radio station is determined its through-put power.In addition, by SIR (signal-to-jamming ratio) that relatively receives from old base station and the SIR that receives from new base station and the SIR that selects bigger reception, this mobile radio station is determined the through-put power control bit of this base station during soft handover.The capacity that this makes it possible to reduce the through-put power of this base station and increases number of users.
And the high speed data transfer in mobile radio system, HSDPA (the High Speed Downlink Packet Access that comprises Wideband Code Division Multiple Access (WCDMA) WCDMA, the high speed downlink packet access) 1xEV-DV (the 1x EVolution Data and Voice of technology and code division multiple access cdma2000,1x evolution-the data of cdma2000 and voice version) technology, all used fast cell selection technology to substitute traditional soft handover.
In existing fast cell selection method, UE (User Equipmennt, subscriber equipment) each frame is by measuring all cell downlink Common Pilot Channel RSCP (the Rdceived Signal CodePower in the active set, received signal code power) intensity or SNR (signal to noise ratio), the sub-district of choosing the intensity maximum is as best cell (first-selected sub-district), indicate this sub-district for its service by up signaling, receive data from this sub-district by high speed shared channels.Any time, has only a best cell through the high speed shared channels service UE.
Because the sub-district that each frame UE chooses measured value maximum in the active set is as best cell, and receive the service of best cell, do not consider the quality of service of Traffic Channel high speed shared channels by high speed shared channels.If Serving cell has surpassed QoS (service quality) desired value to the respective user quality of service of the high speed shared channels of UE, then can waste the system power resource, increase the descending interference of system, reduce power system capacity; If quality of service miss the mark value then can not satisfy the demand to this business.
Summary of the invention
The object of the present invention is to provide a kind of fast cell selection method, reach and reduce the system descending interference, increase the purpose of power system capacity based on the service quality judgment criterion.
To achieve these goals, a kind of fast cell selection method based on the service quality judgment criterion provided by the present invention is: UE is when each sub-district is measured in the active set, measure the signal to noise ratio of Common Pilot Channel, the sub-district that selection is satisfied given Common Pilot Channel signal-to-noise target value and had minimum emissive power is as first-selected sub-district, and subscriber equipment is served by high speed shared channels in this sub-district; If the sub-district that does not meet the demands, then receive the size of the signal to noise ratio of Common Pilot Channel by the sub-district, increase the number of Serving cell, till the Common Pilot Channel that merging receives satisfied minimum signal-to-noise target value in all Common Pilot Channel, UE was served together by high speed shared channels separately in several sub-districts of then choosing.
In above-mentioned fast cell selection method based on the service quality judgment criterion, when each sub-district is measured in the active set, at first set the signal-to-noise target value of Common Pilot Channel according to the high speed shared channels operation quality requirement, measure the signal to noise ratio of Common Pilot Channel, compare with the Common Pilot Channel signal-to-noise target value, find the sub-district of satisfying the high speed shared channels quality of service.
In above-mentioned fast cell selection method based on the service quality judgment criterion, the method of setting the signal-to-noise target value of Common Pilot Channel according to the high speed shared channels operation quality requirement is, by receive with FCS (Fast cell selection, the fast cell selection) relevant system information calculates the signal-to-noise target value of each cell common pilots channel of this user, and this desired value comprises this quality of services for users requirement on the high speed shared channels simultaneously.
Adopt above-mentioned technical scheme, when fast cell is selected, considered the quality of service of high speed shared channels, calculated the signal-to-noise target value of each cell common pilots channel by certain system information.Like this, the present invention is based on the QoS judgment criterion of Traffic Channel, when measurement Common Pilot Channel signal to noise ratio is carried out the fast cell selection, can take into account the requirement of the quality of service of high speed shared channels.In addition, the sub-district that the measurement of each frame of UE is selected to satisfy the signal-to-noise target value of given Common Pilot Channel and have minimum emissive power is as first-selected sub-district, or the merging sub-district, and the noise specific energy of the Common Pilot Channel of its merging is met the demands.Thereby can reduce system descending and disturb, increase power system capacity.
Description of drawings
Fig. 1 is an algorithm flow chart of the present invention.
Embodiment
As shown in Figure 1, UE is in the measuring process of each frame, receive the Common Pilot Channel that launch each sub-district in the active set, also receive simultaneously some system informations relevant with FCS, the transmitting power of the Common Pilot Channel of each sub-district for example, power bias information of each cell common pilots channel and high speed shared channels or the like.Wherein, power bias information between Common Pilot Channel and the high speed shared channels can be used for calculating the signal-to-noise target value of Common Pilot Channel, and the transmitting power of Common Pilot Channel can be used for judging that the signal-to-noise target value that satisfies Common Pilot Channel requires and have the sub-district of minimum emissive power.
Then, UE calculates the signal-to-noise target value of each cell common pilots channel, shown in figure step 2 according to the Common Pilot Channel signal that receives, the system information relevant with FCS.For example, the a certain user's of DSCH Downlink Shared Channel QoS of survice requires DSCH Downlink Shared Channel must satisfy certain signal to noise ratio, according to the power bias between DSCH Downlink Shared Channel and the Common Pilot Channel, can calculate under this business, this user is for the desired signal-to-noise target value of Common Pilot Channel.Next, UE measures the current signal to noise ratio of Common Pilot Channel, shown in figure step 3.
UE judges to measure in the sub-district whether the signal-to-noise target value of the signal-to-noise ratio measurements of Common Pilot Channel more than or equal to Common Pilot Channel in this sub-district is arranged, shown in figure step 4.If the judged result of step 4 is to have the signal-to-noise target value of the signal-to-noise ratio measurements of Common Pilot Channel more than or equal to Common Pilot Channel in this sub-district, then in the sub-district of Common Pilot Channel signal-to-noise ratio measurements more than or equal to this cell common pilots channel signal-to-noise target value, selection has the sub-district of minimum emissive power as best cell (Serving cell), shown in figure step 5, step 6.Determined after the Serving cell that UE serves for it by up signaling indication Serving cell, shown in figure step 7.
If the judged result of step 4 be the signal-to-noise ratio measurements of Common Pilot Channel of neither one sub-district more than or equal to the signal-to-noise target value of this cell common pilots channel, then first count initialized device i makes i=0, shown in figure step 8.Shown in figure step 9, merge i+2 Common Pilot Channel of signal-to-noise ratio measurements maximum then.Next judge that whether the signal to noise ratio of the Common Pilot Channel after merging is more than or equal to the minimum Common Pilot Channel signal-to-noise target value in the active set, shown in figure step 10, if the judged result of step 10 be more than or equal to, then shown in step 11, select to merge the sub-district of Common Pilot Channel as Serving cell.If the judged result of step 10 be less than, then carry out step 13 earlier, judge whether to also have the sub-district that does not merge, whether promptly judge i less than N-2, N is the sub-district number in the active set, because at this moment merged the Common Pilot Channel of i+2 sub-district.If the judged result of step 13 be less than, then can continue merging.At this moment, carry out step 12, counter adds 1, carry out step 9 then, merges the Common Pilot Channel of i+2 sub-district.Operation according to step 10 continues then, finishes until merging.If the judged result of step 13 be more than or equal to, then stop to merge, carry out step 11, the sub-district of selecting the merging Common Pilot Channel is as Serving cell.Determined after the Serving cell that UE serves for it by up signaling indication Serving cell, shown in figure step 7.
Claims (3)
1. fast cell selection method based on the service quality judgment criterion, it is characterized in that, subscriber equipment is when each sub-district is measured in the active set, measure the signal to noise ratio of Common Pilot Channel, the sub-district that selection is satisfied given Common Pilot Channel signal-to-noise target value and had minimum emissive power is as first-selected sub-district, and subscriber equipment is served by high speed shared channels in this sub-district; If the sub-district that does not meet the demands, then receive the size of the signal to noise ratio of Common Pilot Channel by the sub-district, increase the number of Serving cell, till the Common Pilot Channel that merging receives satisfied minimum signal-to-noise target value in all Common Pilot Channel, subscriber equipment was served together by high speed shared channels separately in several sub-districts of then choosing.
2. a kind of fast cell selection method according to claim 1 based on the service quality judgment criterion, it is characterized in that, when each sub-district is measured in the active set, at first set the signal-to-noise target value of Common Pilot Channel according to the high speed shared channels operation quality requirement, measure the signal to noise ratio of Common Pilot Channel, compare with the Common Pilot Channel signal-to-noise target value, find the sub-district of satisfying the high speed shared channels quality of service.
3. a kind of fast cell selection method according to claim 2 based on the service quality judgment criterion, it is characterized in that, the described method of setting the signal-to-noise target value of Common Pilot Channel according to the high speed shared channels operation quality requirement is, select relevant system information to calculate the signal-to-noise target value of each cell common pilots channel of this user by what receive with fast cell, this desired value comprises this quality of services for users requirement on the high speed shared channels simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011129603A CN1155179C (en) | 2001-05-23 | 2001-05-23 | Fast small region choosing method based on QoS judge creterion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011129603A CN1155179C (en) | 2001-05-23 | 2001-05-23 | Fast small region choosing method based on QoS judge creterion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1387332A CN1387332A (en) | 2002-12-25 |
| CN1155179C true CN1155179C (en) | 2004-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB011129603A Expired - Fee Related CN1155179C (en) | 2001-05-23 | 2001-05-23 | Fast small region choosing method based on QoS judge creterion |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0310289D0 (en) * | 2003-05-03 | 2003-06-11 | Koninkl Philips Electronics Nv | Communication system |
| CN101075843B (en) * | 2006-05-18 | 2010-05-12 | 大唐移动通信设备有限公司 | Method and apparatus for selecting combined-inspection homogeneous frequency adjacent area |
| CN102123478B (en) | 2010-01-12 | 2013-11-06 | 华为技术有限公司 | Cell selecting method and user equipment for heterogeneous network |
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2001
- 2001-05-23 CN CNB011129603A patent/CN1155179C/en not_active Expired - Fee Related
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| CN1387332A (en) | 2002-12-25 |
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Granted publication date: 20040623 Termination date: 20170523 |