CN1710992A - Method for increasing downstream data rate of fan region and small region marginal customer - Google Patents
Method for increasing downstream data rate of fan region and small region marginal customer Download PDFInfo
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- CN1710992A CN1710992A CNA2005100900913A CN200510090091A CN1710992A CN 1710992 A CN1710992 A CN 1710992A CN A2005100900913 A CNA2005100900913 A CN A2005100900913A CN 200510090091 A CN200510090091 A CN 200510090091A CN 1710992 A CN1710992 A CN 1710992A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The method includes steps: (1) if signal power of mobile station received by users at boundary of sector is lower than power threshold of multiple access cellular communication system, then mobile station measures pilot signal in each sector, and selects out a group of sector with optimal quality of link; moreover, through up going channel, the method informs the selected result to the selected sector group; (2) the selected sector carries out relevant data dispatching, and sends data signal to the mobile station; (3) after receiving data signal dent from the selected sector, the mobile station carries out merger for these signals.
Description
Technical field
The present invention relates to a kind of descending quick sector or cell set system of selection, be applicable to any cellular radio Communication system that inserts (OFDMA), code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access multi-access modes such as (FDMA) based on OFDM.
Background technology
The brand-new business of following global communication will propose higher requirement to transmission rate, the bit rate that particularly how to improve Cell Edge User has become the problem that industry is extremely paid close attention to, and for example the long evolving system (LTE) of third generation partner program tissue (3GPP) just puts forward this especially as an important requirement.
Soft handover, the high-speed down data bag that the technology that is used at present solving the Cell Edge User transmission rate issues in the mobile communication system mainly contains code division multiple access system inserts fast cell in (HSDPA) and selects (FCS) etc., but all there are some problems in they.Though compare with direct-cut operation, the macro diversity of soft handover can improve the communication quality of user at cell edge, makes to call out to shift more smoothly in the minizone, and the soft handover activating set updating time is slower, is unfavorable for improving downstream data rate.In fast cell was selected, in any moment, travelling carriage only selected a sub-district to send data to it, has relatively reduced interference, but was difficult for combining with the multi-antenna technology that can improve capacity greatly.Therefore be necessary to study a kind of method future mobile communication system, that adapt to the descending Cell Edge User data rate of raising of multi-antenna technology that is used for.
Summary of the invention
The object of the present invention is to provide descending quick sector (sub-district) group selection method of a kind of raising sector (sub-district) edge customer speed, thereby improve the transmission rate of cell edge, the influence of opposing rapid fading and slow fading adapts to multi-antenna technology better.
According to an aspect of the present invention, provide a kind of set of sectors system of selection that in the TDMA cellular communication system, improves the sector-edge user downstream data rate, comprised step:
(1) when the received signal power of the travelling carriage of sector-edge user is lower than the threshold power of described TDMA cellular communication system, described travelling carriage is measured each sector pilot signals, select the sector of one group of link-quality the best, and utilize ascending control channel to be notified to the set of sectors of described selection selection result;
(2) set of sectors of described selection is carried out corresponding data dispatch, and sends data-signal to described travelling carriage;
(3) after described travelling carriage receives the data-signal that the set of sectors of described selection sends, these signals are merged.
According to another aspect of the present invention, provide a kind of cell set system of selection that in the TDMA cellular communication system, improves the Cell Edge User downstream data rate, comprised step:
(1) when the received signal power of the travelling carriage of Cell Edge User is lower than the threshold power of described TDMA cellular communication system, described travelling carriage is measured the pilot channel of each sub-district, select the sub-district of one group of link-quality the best, and utilize ascending control channel to be notified to the cell set of described selection selection result;
(2) cell set of described selection is carried out corresponding data dispatch, and sends data-signal to described travelling carriage;
(3) after described travelling carriage receives the data-signal that the cell set of described selection sends, these signals are merged.
According to basic design of the present invention, utilize the advantage of quick sector (sub-district) selection and multi-antenna technology, with both better combinations.The concrete steps of this scheme comprise:
The first step: carry out physical layer and measure.Travelling carriage is by measuring the pilot signal of each sector (sub-district), in conjunction with best one or several sectors (sub-district) of Information Selection link-quality such as the current available horsepower of each sector (sub-district), business load, resource allocation conditions.
Second step: the signal carrier/interface ratio value of sector (sub-district) group selection result and selected sector (sub-district) is notified to each sector (sub-district) of being chosen with up physical layer signaling.
The 3rd step: the sector of choosing (sub-district) group is to the scheduling of this mobile station data.The Node B at the group place of choosing, " the best " sector (sub-district) sends the modulation coding mode that the next frame data are adopted according to the carrier/interface ratio Information Selection that receives to this travelling carriage.
Through above step, finish once sector (sub-district) group selection fast.The measurement of the received signal power of pilot channel is all carried out at every frame, the turnover rate that is to say sector (sub-district) group selection be every frame once, time delay is very little, can resist the influence of rapid fading than direct-cut operation or soft handover better.Select one or more sectors (sub-district) to be the travelling carriage service simultaneously, can improve the downstream data rate of sector (sub-district) edge customer better.
Description of drawings
Fig. 1 has illustrated to select according to the quick set of sectors between Node B of the present invention inside and the Node B.
Embodiment
According to the present invention, a kind of method that improves sector (sub-district) edge customer downstream data rate in cellular radio is provided, when the user is in edge, sector (sub-district), travelling carriage selects composition sector, sector (sub-district) (sub-district) group of one or several link-quality the best to be used for the downlink data transmission according to certain rule, and the multiple signals that this sector (sub-district) group sends merge accordingly at user side.Wherein,
When the travelling carriage received signal that is in edge, sector (sub-district) is lower than certain threshold value of system's regulation, travelling carriage is selected the sector (sub-district) of one group of link-quality the best according to transmitting of each sector (sub-district) antenna that receives, and sector (sub-district) group of utilizing ascending control channel notice to be chosen selection result, be moved sector (sub-district) group that platform chooses and carry out corresponding data dispatch, simultaneously travelling carriage is sent data-signal, travelling carriage merges according to certain mode after receiving the data-signal of sector (sub-district) the group transmission of choosing.
In the present invention, in the sector of choosing (sub-district) group the data-signal form of each sector (sub-district) antenna transmission can be identical also can be different, for example can adopt empty time-code etc. to send deversity scheme.The sector of choosing (sub-district) group can be upgraded apace according to the real-time change of channel, can accomplish the speed that every radio frames is upgraded.And antenna in cell can be directional aerial, carries out quick set of sectors this moment and selects, and antenna in cell also can be omnidirectional antenna, carries out the fast cell group selection this moment.
In the present invention, the method for mobile station in selecting sector (sub-district) group can be according to the pilot information of each sector (sub-district) antenna transmission standard as sector (sub-district) group selection.And the signal of a plurality of antenna transmission merges accordingly at user side in sector (sub-district) group, and the merging method can adopt merging methods such as high specific merging, selectivity merging, equal gain combining.
In addition, unit, a plurality of sectors (sub-district) can be notified the information relevant with the travelling carriage of being served mutually each other.When being moved sector (sub-district) group that platform chooses and carrying out corresponding data dispatch, relevant resource allocation can be distributed by unit special in the system.And (sub-district) base station, each sector and travelling carriage can also can be antenna array for single antenna.
In the present invention, the different fan antennas of same sub-district can be settled on the identical or different geographical position, and the base station of different districts is placed on the different geographical position.And, the zone at place when sector (sub-district) fringe region can be defined as received signal when travelling carriage and is lower than certain threshold value of system's regulation.
Need to prove that quick sector of the present invention (sub-district) group selection scheme is irrelevant with concrete which kind of access technology that adopts, can be applied to the system of frequency division multiple access, time division multiple access, code division multiple access and OFDM access etc.Use the cellular radio Communication system of quick sector (sub-district) group selection scheme, has the unit that can carry out resource allocation, base station, each sector (sub-district) has transmission and receiving equipment, travelling carriage also has transmission and receiving equipment, can distinguish the transmission signal of base station, a plurality of sectors (sub-district) and possess the ability that signal merges.
With reference to the accompanying drawings and in conjunction with the preferred embodiments of the present invention quick sector of the present invention (sub-district) group selection is described.
Referring to Fig. 1, the quick set of sectors of having described among Fig. 1 between Node B inside and the Node B is selected.
Travelling carriage 1 is in Node B 1 inner sector intersection, carrying out the quick set of sectors of Node B inside selects, each update cycle sends downlink data from inner one or several (being made as 2 the present embodiment) sector of pilot signal strength maximum of selecting of Node B to travelling carriage, and selected sector links to each other with same Node B.
Travelling carriage 2 is in sector intersection between Node B 1, Node B 2, the Node B 3, the quick set of sectors of carrying out between the Node B is selected, each update cycle is selected the pilot signal strength maximum from sector 1B, sector 2A, sector 3A one or several (being made as 2 in the present embodiment) sector sends downlink data to travelling carriage, and at this moment selected sector can belong to different Node B.
In addition, when Node B was omnidirectional antenna, travelling carriage carried out the fast cell group selection, selected one or several sub-district of pilot signal strength maximum to send downlink data to travelling carriage.
Claims (16)
1, a kind of set of sectors system of selection that improves the sector-edge user downstream data rate in the TDMA cellular communication system comprises step:
(1) when the received signal power of the travelling carriage of sector-edge user is lower than the threshold power of described TDMA cellular communication system, described travelling carriage is measured the pilot channel of each sub-district, select the sector of one group of link-quality the best, and utilize ascending control channel to be notified to the set of sectors of described selection selection result;
(2) set of sectors of described selection is carried out corresponding data dispatch, and sends data-signal to described travelling carriage;
(3) after described travelling carriage receives the data-signal that the set of sectors of described selection sends, these signals are merged.
2, method according to claim 1, the mode that each fan antenna in the set of sectors of wherein said selection sends signal is identical.
3, method according to claim 1, each fan antenna in the set of sectors of wherein said selection sends the mode difference of signal.
4, method according to claim 1, each fan antenna in the set of sectors of wherein said selection adopt empty time-code to send deversity scheme.
5, method according to claim 1, wherein said travelling carriage is selected the sector of one group of link-quality the best in each radio frames, thus the cycle of realizing set of sectors upgrades.
6, method according to claim 1, wherein the merging in the step (3) adopts high specific merging, selectivity to merge or equal gain combining.
7, method according to claim 1, wherein step (1) also comprises step:
Described travelling carriage is by to the measuring of the pilot channel of each sub-district, and selects the best set of sectors of link-quality in conjunction with current available horsepower, business load, the resource allocation conditions of each sector;
Described travelling carriage utilizes the upstream physical layer signaling signal carrier/interface ratio value of selection result and selected sector to be notified to the sector of described selection.
8, method according to claim 7, wherein step (2) also comprises step:
The base station at the set of sectors place of described selection sends the modulation coding mode that the next frame data are adopted according to the carrier/interface ratio Information Selection that receives to affiliated travelling carriage.
9, a kind of cell set system of selection that improves the sector-edge user downstream data rate in the TDMA cellular communication system comprises step:
(1) when the received signal power of the travelling carriage of Cell Edge User is lower than the threshold power of described TDMA cellular communication system, described travelling carriage is measured the pilot channel of each sub-district, select the sub-district of one group of link-quality the best, and utilize ascending control channel to be notified to the cell set of described selection selection result;
(2) cell set of described selection is carried out corresponding data dispatch, and sends data-signal to described travelling carriage;
(3) after described travelling carriage receives the data-signal that the cell set of described selection sends, these signals are merged.
10, method according to claim 9, the mode that each antenna in cell in the cell set of wherein said selection sends signal is identical.
11, method according to claim 9, each antenna in cell in the cell set of wherein said selection sends the mode difference of signal.
12, method according to claim 9, each antenna in cell in the cell set of wherein said selection adopt empty time-code to send deversity scheme.
13, method according to claim 9, wherein said travelling carriage is selected the sub-district of one group of link-quality the best in each radio frames, thus the cycle of realizing cell set upgrades.
14, method according to claim 9, wherein the merging in the step (3) adopts high specific merging, selectivity to merge or equal gain combining.
15, method according to claim 9, wherein step (1) also comprises step:
Described travelling carriage is by to the measuring of the pilot channel of each sub-district, and selects the best cell set of link-quality in conjunction with current available horsepower, business load, the resource allocation conditions of each sub-district;
Described travelling carriage utilizes the upstream physical layer signaling signal carrier/interface ratio value of selection result and selected sub-district to be notified to the sub-district of described selection.
16, method according to claim 15, wherein step (2) also comprises step:
The base station at the cell set place of described selection sends the modulation coding mode that the next frame data are adopted according to the carrier/interface ratio Information Selection that receives to affiliated travelling carriage.
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| CNB2005100900913A CN100450293C (en) | 2005-08-12 | 2005-08-12 | Method for increasing downstream data rate of fan region and small region marginal customer |
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| CNB2005100900913A CN100450293C (en) | 2005-08-12 | 2005-08-12 | Method for increasing downstream data rate of fan region and small region marginal customer |
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Cited By (7)
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| CN101179822B (en) * | 2006-11-07 | 2010-05-12 | 华为技术有限公司 | Method, device and system for implementing soft switch |
| CN101459942B (en) * | 2007-12-14 | 2010-08-18 | 华为技术有限公司 | Method and mobile terminal for determining transmission end of base station |
| CN102177755A (en) * | 2008-08-11 | 2011-09-07 | 北方电讯网络有限公司 | Coordinated power boost and power back-off |
| CN101420254B (en) * | 2007-10-24 | 2012-09-26 | 中兴通讯股份有限公司 | Method for obtaining multiple node diversity gain |
| CN102781113A (en) * | 2006-05-03 | 2012-11-14 | 韩国电子通信研究院 | Method for transmitting up link control signal in mobile communication system |
| CN101558679B (en) * | 2006-11-17 | 2012-11-28 | 艾利森电话股份有限公司 | A mobile station communicating with a base station via a separate uplink when the parameters of channel quality fall below the predefined threholds |
| CN101610557B (en) * | 2008-06-20 | 2012-11-28 | 中兴通讯股份有限公司 | Method for dispatching terminals among wireless nodes |
Family Cites Families (3)
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| CN1148909C (en) * | 2001-10-24 | 2004-05-05 | 北京星河亮点通信软件有限责任公司 | Method for creating small district cluster and switching method between small district clusters |
| US8400979B2 (en) * | 2003-01-07 | 2013-03-19 | Qualcomm Incorporated | Forward link handoff for wireless communication systems with OFDM forward link and CDMA reverse link |
| US7194276B2 (en) * | 2003-09-15 | 2007-03-20 | Lucent Technologies Inc. | Methods and devices for grouping cells |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102781113A (en) * | 2006-05-03 | 2012-11-14 | 韩国电子通信研究院 | Method for transmitting up link control signal in mobile communication system |
| CN101438513B (en) * | 2006-05-03 | 2013-06-12 | 韩国电子通信研究院 | Method for transmitting uplink control signal in mobile communication system |
| CN102781113B (en) * | 2006-05-03 | 2016-02-17 | 韩国电子通信研究院 | Transmit and receive the method for the response being used for Stochastic accessing |
| CN101179822B (en) * | 2006-11-07 | 2010-05-12 | 华为技术有限公司 | Method, device and system for implementing soft switch |
| CN101558679B (en) * | 2006-11-17 | 2012-11-28 | 艾利森电话股份有限公司 | A mobile station communicating with a base station via a separate uplink when the parameters of channel quality fall below the predefined threholds |
| CN101420254B (en) * | 2007-10-24 | 2012-09-26 | 中兴通讯股份有限公司 | Method for obtaining multiple node diversity gain |
| CN101459942B (en) * | 2007-12-14 | 2010-08-18 | 华为技术有限公司 | Method and mobile terminal for determining transmission end of base station |
| CN101610557B (en) * | 2008-06-20 | 2012-11-28 | 中兴通讯股份有限公司 | Method for dispatching terminals among wireless nodes |
| CN102177755A (en) * | 2008-08-11 | 2011-09-07 | 北方电讯网络有限公司 | Coordinated power boost and power back-off |
| CN102177755B (en) * | 2008-08-11 | 2014-03-12 | 黑莓有限公司 | Coordinated power boost and power back-off |
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| CN100450293C (en) | 2009-01-07 |
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Owner name: BEIJING STAR POINT TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: BEIJING POSTAL AND TELECOMMUNICATIONS UNIV. Effective date: 20120217 |
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Effective date of registration: 20120217 Address after: 100102 Beijing city two Chaoyang District Lize Road No. 2 A block three layer Patentee after: BEIJING STARPOINT TECHNOLOGY CO., LTD. Address before: 100876 Beijing city Haidian District Xitucheng Road No. 10 Patentee before: Beijing University of Posts and Telecommunications |