CN101742601B - Switch method for guaranteeing business service quality in relay system - Google Patents
Switch method for guaranteeing business service quality in relay system Download PDFInfo
- Publication number
- CN101742601B CN101742601B CN2009102514954A CN200910251495A CN101742601B CN 101742601 B CN101742601 B CN 101742601B CN 2009102514954 A CN2009102514954 A CN 2009102514954A CN 200910251495 A CN200910251495 A CN 200910251495A CN 101742601 B CN101742601 B CN 101742601B
- Authority
- CN
- China
- Prior art keywords
- travelling carriage
- base station
- relay station
- cell
- hys
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a switch method for guaranteeing business service quality in a relay system, which is characterized in that switch offset parameters (OS) dedicated by business are introduced in a conditional equality of triggering switch, to avoid unnecessary switch of guaranteed bit rate bearer service users, and meanwhile to encourage non-guaranteed bit rate bearer service users to selectively switch, thus improving service experience when users switch in the relay system.
Description
Technical field
The invention belongs to the mobility control technology field in the mobile communication, be specifically related to guarantee in the relay system changing method of QoS.
Background technology
In wireless communication system, when travelling carriage from a sub-district (scope that refers to base station and covering thereof) when moving to another sub-district, need carry out channel for the not interrupt communication that keeps the mobile subscriber and switch.
" international electronics journal (the IEEE Communication magazine 2004 that communicates by letter with The Institution of Electrical Engineers; Volume.42, issue 9, pp.80-89; 2005) think; In cellular network of future generation, relaying technique is a kind of lifting capacity and expands the coverage area, and improves the important technology of cell edge throughput.In relay system, the not only direct and base station communication of user, and can its information be delivered to the base station through relay station.But the introducing of relaying can form a lot " Microcell ", thereby causes that mobile subscriber's switching times increases in the sub-district; And the multi-hop of relaying Signalling exchange in handoff procedure can cause very big data interruption time delay.
According to the regulation in " third generation partner program agreement " (3GPP.TS 36.331V8.5.0), the conditional event A5 that triggers switching is:
Travelling carriage adds that to the channel quality Ms of current area base station the amount of hysteresis Hys sum that is provided with in order to reduce table tennis to switch is less than the situation of adding thresholding Thresh1, that is:
Ms+Hys＜Thresh1
Simultaneously travelling carriage deduct amount of hysteresis Hys to the channel quality Mn of adjacent cell base station difference greater than leaving situation thresholding Thresh2, that is:
Mn-Hys＞Thresh2
Wherein Hys, Thresh1 and Thresh2 are by system configuration, and Mn and Ms are obtained by moving table measuring.
Triggering the thresholding that switches is indifference to the user who uses different business, and this can not provide better service quality to guarantee as far as having the business of different demands.Non-assurance bit rate (NonGBR) loaded service is insensitive to time delay, switches the time delay of bringing and can tolerate for such service-user; And guarantee bit rate (GBR) loaded service to delay sensitive, in relay system, postponing a meeting or conference during the frequent data interruption with for a long time of switching times badly influences this professional user experience.
Summary of the invention
The objective of the invention is to propose a kind of changing method that in relay system, guarantees QoS; Get the exclusive switching skew parameter OS of different business through user in the switch decision condition according to different business; With the switching of avoiding guaranteeing that the bit rate service-user is unnecessary, thereby improve the business experience the when user is switched in the relay system.
The present invention guarantees the changing method of QoS in relay system, be included in base station of each cell setting, and cell edge is provided with relay station; Travelling carriage is randomly dispersed in random motion in each sub-district; Travelling carriage is directly with base station communication or pass through relay station and base station communication;
Travelling carriage extracts the system configuration parameter that comprises amount of hysteresis Hys, adding situation thresholding Thresh1 and leave situation thresholding Thresh2 from the cell broadcasting system information of base station or relay station; Identify the measuring process that triggers travelling carriage by base station or relay station to adjacent cell base station or the relay station that the travelling carriage transmission needs to measure; Travelling carriage is the ratio of the mean value of the power of the mean value of the power of the reference signal of affiliated base station or relay station and all signals channel quality Ms as current area, and the ratio of the mean value of the mean value of the power of the adjacent cell base station that needs to measure or the reference signal of relay station and the power of all signals is as the channel quality Mn of adjacent sub-district;
It is characterized in that:
If travelling carriage uses a kind of business, base station or relay station are mapped to the exclusive switching side-play amount of a business OS according to its service bearer type; The difference of measuring 4dB and amount of hysteresis Hys for the professional exclusive switching skew that guarantees bit rate (GBR) service-user is 4dB-Hys; The difference of measuring 2dB and amount of hysteresis Hys for the professional exclusive switching skew of non-assurance bit rate (NonGBR) service-user is 2dB-Hys; If travelling carriage uses the business of assurance bit rate and the business of non-assurance bit rate simultaneously, base station or relay station are chosen the professional exclusive switching side-play amount that guarantees that bit rate is professional; Base station or relay station send to travelling carriage with the exclusive switching side-play amount of business through cell broadcasting system information;
If said directly with the travelling carriage of base station communication satisfy travelling carriage to channel quality Ms, amount of hysteresis Hys and the professional exclusive switching side-play amount OS sum of current area base station less than adding situation thresholding Thresh1, that is: Ms+Hys+OS＜Thresh1; Simultaneously travelling carriage deducts difference that amount of hysteresis Hys deducts professional exclusive switching side-play amount OS again greater than leaving situation thresholding Thresh2 to the channel quality Mn of adjacent cell base station or relay station; That is: during Mn-Hys-OS＞Thresh2, travelling carriage directly is reported to the base station with " measurement report " message, and the strongest efficient cell of base station selected metrical information is confirmed as Target cell; Former afterwards cell base station sends switching command to travelling carriage; Travelling carriage breaks off and being connected of former cell base station according to switching command, begins to be synchronized to Target cell, and on Target cell, begins to receive and the transmission user data; Former base station discharges the Radio Resource of former sub-district under the travelling carriage, promptly switches and accomplishes; Otherwise the still direct and current cell base station of travelling carriage communicates;
Said travelling carriage through relay station and base station communication, if satisfy travelling carriage to channel quality Ms, amount of hysteresis Hys and the professional exclusive switching side-play amount OS sum of current relay station less than adding situation thresholding Thresh1, that is: Ms+Hys+OS＜Thresh1; Simultaneously travelling carriage deducts difference that amount of hysteresis Hys deducts professional exclusive switching side-play amount OS again greater than leaving situation thresholding Thresh2 to the channel quality Mn of adjacent cell base station or relay station; That is: during Mn-Hys-OS＞Thresh2; Travelling carriage directly is reported to relay station with " measurement report " message, and relay station is reported to the base station through back haul link again; The strongest efficient cell of base station selected metrical information is confirmed as Target cell, and former afterwards cell base station sends switching command through back haul link to travelling carriage, and relay station sends to travelling carriage with switching command again; Travelling carriage breaks off and being connected of former sub-district relay station according to switching command, begins to be synchronized to Target cell, and on Target cell, begins to receive and send user data, and former relay station discharges the Radio Resource of former sub-district under the travelling carriage, promptly switches completion; Otherwise the still direct and current sub-district relay station of travelling carriage communicates.
Compared with prior art; The switch triggering method of the consideration service feature that the present invention proposes; Through in triggering the conditional equality of switching, introducing professional exclusive switching skew parameter OS; Avoid the switching that guarantees that bit rate bearer service user is unnecessary as far as possible, encourage non-assurance bit rate bearer service user to switch selectively simultaneously, thereby improve the business experience the when user is switched in the relay system.
Description of drawings
Fig. 1 is the networking telephone (Voice over Internet Protocol, VoIP) the relation curve a of professional packet loss and OS;
Fig. 2 is the relation curve b of VoIP switching times (inferior/second) and OS;
Fig. 3 is FTP (File Transfer Protocol, FTP) the relation curve c of service transmission rate and OS;
Fig. 4 is the relation curve d of ftp business switching times and OS.
Embodiment
Embodiment below in conjunction with description of drawings this method.
Embodiment 1:
(Long Term Evolution, LTE) switching flow of travelling carriage is basic as statement in the system with the Long Term Evolution plan for present embodiment.In the cellular cell system that adopts 19 hexagonal cell are arranged, in base station of each cell setting, cell edge is provided with relay station; There are 3 sectors each sub-district; Two relay stations of each sector configuration, relay station is 500m to the distance of base station, the mode that relay station adopts demodulation to transmit.Carrier frequency is made as 2GHz, and channel width is 10MHz.120 ° of directional antennas are adopted in the base station, and antenna gain is the azimuth of directional antenna for
-180＜θ＜180 '.θ
3dbBe set at 70 degree, A
mBe made as 20dB, the maximum gain of every strip antenna is 14dBi, and this maxgain value depends on the sensing of antenna.Along with the departing from of boresight direction, antenna gain progressively reduces, maximum attenuation is 20dB.The relay station end adopts omnidirectional antenna.Large scale decline to relay station is 128.1+37.6log to the travelling carriage base station to travelling carriage and relay station in the base station
10(d), d is the distance of travelling carriage to the base station, and unit is a km.The small scale decline all will be upgraded at each time slot, and present embodiment adopts the Rayleigh channel model, and its Doppler frequency is defined as 600Hz.If the transmitted power of base station and relay station is respectively 10dBm and 20dBm.Thermal noise density is-104dBm/Hz.Base station relay station and travelling carriage are the single antenna configuration.Channel model is a Rayleigh channel.
Present embodiment adopts " third generation partner program agreement " (3GPP) middle frame structure that is provided with, and adaptive coding and modulating is QPSK 1/3, and QPSK 1/2, and QPSK 2/3, and 16QAM 2/3.
Data interruption time delay (being break period), expression be in handoff procedure, the time that the user data face send to suspend, directly have influence on the user experience in the handoff procedure.Table 1 has provided each part of data interruption time delay;
The part of table 1 data interruption time delay
Delay parameter in the table 1 obtains under desirable transmission conditions, the about 30ms of the handover delay of single-hop in the real system, the about 69ms of multi-hop handover delay in the relaying; This is an acceptable for the insensitive non-assurance bit rate bearer service of time delay, but for the assurance bit rate bearer service to delay sensitive, will have a strong impact on user's experience;
Guarantee the bit rate service-user for delay sensitive and insensitive to data speed, VoIP service-user for example can be stood abominable relatively speech quality and can't stand the delay of speech, when time delay surpasses 50ms, the packet loss behavior can take place.Therefore this type user is to switching the user of " fear ".Non-assurance bit rate service-user is insensitive and to the data rate sensitivity to time delay, and for example ftp business then can be stood long packet and postpone.Therefore this type user is to switching the user of " preference ", and to this type user, data rate is mainly by channel quality and system resource decision.Therefore when having detected the better sub-district of signal quality and can insert, should switch immediately.
Adopt two kinds of service application in the present embodiment, a kind of is ftp business, and a kind of is that VoIP is professional, and both ratios are 1: 1.500 users are arranged in the cell system, and each user only uses a kind of business.Simulation time is 1000s, and switch once each second.Frame structure is 10ms one frame, and the Hys parameter is set to 0.
The parameter of setting two types of business is as shown in table 2 below:
The parameter of table 2 business model
Being distributed in each sub-district of travelling carriage randomness, the translational speed of travelling carriage is 30m/s, moving direction is at random.Own nearest base station or the relay station of travelling carriage and distance communicates; Travelling carriage is divided into two types, and one type is the travelling carriage of direct and base station communication, and one type is the travelling carriage through relay station and base station communication;
Travelling carriage extracts the system configuration parameter that comprises amount of hysteresis Hys, adding situation thresholding Thresh1 and leave situation thresholding Thresh2 from the cell broadcasting system information of base station or relay station; Identify the measuring process that triggers travelling carriage by base station or relay station to adjacent cell base station or the relay station that the travelling carriage transmission needs to measure; Travelling carriage is according to the ratio of the mean value of the power of the mean value of the power of the reference signal of affiliated base station or relay station and all signals channel quality Ms as current area, and the ratio of the mean value of the mean value of the power of the adjacent cell base station that needs to measure or the reference signal of relay station and the power of all signals is as the channel quality Mn of adjacent sub-district;
If travelling carriage uses a kind of business, base station or relay station are mapped to an exclusive switching side-play amount of business (OS) according to its service bearer type; 4dB-Hys is measured in professional exclusive switching skew for guaranteeing bit rate (GBR) service-user; 2dB-Hys is measured in professional exclusive switching skew for non-assurance bit rate (NonGBR) service-user; If travelling carriage uses the business of assurance bit rate and the business of non-assurance bit rate simultaneously, base station or relay station are chosen the professional exclusive switching side-play amount that guarantees that bit rate is professional; Base station or relay station send to travelling carriage with the exclusive switching side-play amount of business through cell broadcasting system information.
If said directly with the travelling carriage of base station communication satisfy travelling carriage to channel quality Ms, amount of hysteresis Hys and the professional exclusive switching side-play amount OS sum of current area base station less than adding situation thresholding Thresh1, that is: Ms+Hys+OS＜Thresh1; Simultaneously travelling carriage deducts difference that amount of hysteresis Hys deducts professional exclusive switching side-play amount OS again greater than leaving situation thresholding Thresh2 to the channel quality Mn of adjacent cell base station or relay station; That is: during Mn-Hys-OS＞Thresh2, travelling carriage directly is reported to the base station with " measurement report " message, and the strongest efficient cell of base station selected metrical information is confirmed as Target cell; Former afterwards cell base station sends switching command to travelling carriage; Travelling carriage breaks off and being connected of former cell base station according to switching command, begins to be synchronized to Target cell, and on Target cell, begins to receive and the transmission user data; Former base station discharges the Radio Resource of former sub-district under the travelling carriage, promptly switches and accomplishes; Otherwise the still direct and current cell base station of travelling carriage communicates.
Said travelling carriage through relay station and base station communication, if satisfy travelling carriage to channel quality Ms, amount of hysteresis Hys and the professional exclusive switching side-play amount OS sum of current relay station less than adding situation thresholding Thresh1, that is: Ms+Hys+OS＜Thresh1; Simultaneously travelling carriage deducts difference that amount of hysteresis Hys deducts professional exclusive switching side-play amount OS again greater than leaving situation thresholding Thresh2 to the channel quality Mn of adjacent cell base station or relay station; That is: during Mn-Hys-OS＞Thresh2; Travelling carriage directly is reported to relay station with " measurement report " message, and relay station is reported to the base station through back haul link again; The strongest efficient cell of base station selected metrical information is confirmed as Target cell, and former afterwards cell base station sends switching command through back haul link to travelling carriage, and relay station sends to travelling carriage with switching command again; Travelling carriage breaks off and being connected of former sub-district relay station according to switching command, begins to be synchronized to Target cell, and on Target cell, begins to receive and send user data, and former relay station discharges the Radio Resource of former sub-district under the travelling carriage, promptly switches completion; Otherwise the still direct and current sub-district relay station of travelling carriage communicates.
Accompanying drawing 1 is the relation curve a of professional packet loss of VoIP and OS; Abscissa is the value of OS, and ordinate is the professional packet loss of VoIP, does not introduce professional exclusive switching skew, promptly when OS gets 0dB, switches the signal quality decision by two sub-districts, as long as adjacent cell signal quality is better than current area, just carries out and switches.At this time packet loss mainly causes owing to switching.Get at OS-1dB in, when the signal quality that adjacent cell signal is weaker than current area is not more than 1dB, force to switch, this moment, packet loss was not only caused by switching but also because the channel quality variation causes packet loss, so the packet loss of this moment uprises a little.OS get 0dB in 4dB because the signal quality of adjacent sub-district is higher than current area with OS just switches, avoid switching as far as possible, so packet loss reduces,,, make the packet loss rising because the current area channel quality is too poor when OS gets 4dB when above.So the comprehensive channel mass change with switch the packet loss cause, when VoIP was professional, when getting OS and be 4dB, packet loss was minimum.
Compared with prior art; The switch triggering method of the consideration service feature that the present invention proposes; Through introducing professional exclusive switching skew parameter OS; Avoid switching the unnecessary switching of assurance bit rate bearer service user of " fear " as far as possible, encourage the non-assurance bit rate bearer service user of switching " preference " to switch selectively simultaneously, thereby improve the business experience the when user is switched in the relay system.
Claims (1)
1. a changing method that in relay system, guarantees QoS is included in base station of each cell setting, and cell edge is provided with relay station; Travelling carriage is randomly dispersed in random motion in each sub-district; Travelling carriage is directly with base station communication or pass through relay station and base station communication;
Travelling carriage extracts the system configuration parameter that comprises amount of hysteresis Hys, adding situation thresholding Thresh1 and leave situation thresholding Thresh2 from the cell broadcasting system information of base station or relay station; Identify the measuring process that triggers travelling carriage by base station or relay station to adjacent cell base station or the relay station that the travelling carriage transmission needs to measure; Travelling carriage is the ratio of the mean value of the power of the mean value of the power of the reference signal of affiliated base station or relay station and all signals channel quality Ms as current area, and the ratio of the mean value of the mean value of the power of the adjacent cell base station that needs to measure or the reference signal of relay station and the power of all signals is as the channel quality Mn of adjacent sub-district;
It is characterized in that:
If travelling carriage uses a kind of business, base station or relay station are mapped to the exclusive switching side-play amount of a business OS according to its service bearer type; The difference of measuring 4dB and amount of hysteresis Hys for the professional exclusive switching skew that guarantees the bit rate service-user is 4dB-Hys; The difference of measuring 2dB and amount of hysteresis Hys for the professional exclusive switching skew of non-assurance bit rate service-user is 2dB-Hys; If travelling carriage uses the business of assurance bit rate and the business of non-assurance bit rate simultaneously, base station or relay station are chosen the professional exclusive switching side-play amount that guarantees that bit rate is professional; Base station or relay station send to travelling carriage with the exclusive switching side-play amount of business through cell broadcasting system information;
If said directly with the travelling carriage of base station communication satisfy travelling carriage to channel quality Ms, amount of hysteresis Hys and the professional exclusive switching side-play amount OS sum of current area base station less than adding situation thresholding Thresh1, that is: Ms+Hys+OS＜Thresh1; Simultaneously travelling carriage deducts difference that amount of hysteresis Hys deducts professional switching side-play amount OS again greater than leaving situation thresholding Thresh2 to the channel quality Mn of adjacent cell base station or relay station; That is: during Mn-Hys-OS＞Thresh2, travelling carriage directly is reported to the base station with " measurement report " message, and the strongest efficient cell of base station selected metrical information is confirmed as Target cell; Former afterwards cell base station sends switching command to travelling carriage; Travelling carriage breaks off and being connected of former cell base station according to switching command, begins to be synchronized to Target cell, and on Target cell, begins to receive and the transmission user data; Former base station discharges the Radio Resource of former sub-district under the travelling carriage, promptly switches and accomplishes; Otherwise the still direct and current cell base station of travelling carriage communicates; Said travelling carriage through relay station and base station communication, if satisfy travelling carriage to channel quality Ms, amount of hysteresis Hys and the professional exclusive switching side-play amount OS sum of current relay station less than adding situation thresholding Thresh1, that is: Ms+Hys+OS＜Thresh1; Simultaneously travelling carriage deducts difference that amount of hysteresis Hys deducts professional exclusive switching side-play amount OS again greater than leaving situation thresholding Thresh2 to the channel quality Mn of adjacent cell base station or relay station; That is: during Mn-Hys-OS＞Thresh2; Travelling carriage directly is reported to relay station with " measurement report " message, and relay station is reported to the base station through back haul link again; The strongest efficient cell of base station selected metrical information is confirmed as Target cell, and former afterwards cell base station sends switching command through back haul link to travelling carriage, and relay station sends to travelling carriage with switching command again; Travelling carriage breaks off and being connected of former sub-district relay station according to switching command, begins to be synchronized to Target cell, and on Target cell, begins to receive and send user data, and former relay station discharges the Radio Resource of former sub-district under the travelling carriage, promptly switches completion; Otherwise the still direct and current sub-district relay station of travelling carriage communicates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102514954A CN101742601B (en) | 2009-12-24 | 2009-12-24 | Switch method for guaranteeing business service quality in relay system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102514954A CN101742601B (en) | 2009-12-24 | 2009-12-24 | Switch method for guaranteeing business service quality in relay system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101742601A CN101742601A (en) | 2010-06-16 |
| CN101742601B true CN101742601B (en) | 2012-03-14 |
Family
ID=42465303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102514954A Expired - Fee Related CN101742601B (en) | 2009-12-24 | 2009-12-24 | Switch method for guaranteeing business service quality in relay system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101742601B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8755324B2 (en) * | 2011-08-03 | 2014-06-17 | Blackberry Limited | Allocating backhaul resources |
| CN102769876A (en) * | 2012-07-02 | 2012-11-07 | 中兴通讯股份有限公司 | Method and device for ensuring quality of service in relay system |
| CN106550412B (en) | 2015-09-21 | 2021-06-29 | 索尼公司 | Electronic device and wireless communication method in wireless communication system |
| CN108260177A (en) * | 2016-12-28 | 2018-07-06 | 大唐移动通信设备有限公司 | A kind of serving cell switching method and base station based on type of service |
| CN110831095B (en) * | 2018-08-11 | 2021-11-19 | 华为技术有限公司 | Communication method and communication device |
| CN116996572B (en) * | 2023-09-27 | 2023-12-08 | 北京三圣凯瑞科技有限公司 | Proxy node balancing method, system, terminal and storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101119581A (en) * | 2006-08-04 | 2008-02-06 | 华为技术有限公司 | Method for transmitting service quality information in evolvement network |
| CN101128003A (en) * | 2006-08-17 | 2008-02-20 | 中兴通讯股份有限公司 | Load evaluation method of packet service wireless access system based on user satisfaction |
| CN101150840A (en) * | 2006-09-20 | 2008-03-26 | 上海贝尔阿尔卡特股份有限公司 | Method and device for switching mobile relay station and its affiliated mobile station |
-
2009
- 2009-12-24 CN CN2009102514954A patent/CN101742601B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101119581A (en) * | 2006-08-04 | 2008-02-06 | 华为技术有限公司 | Method for transmitting service quality information in evolvement network |
| CN101128003A (en) * | 2006-08-17 | 2008-02-20 | 中兴通讯股份有限公司 | Load evaluation method of packet service wireless access system based on user satisfaction |
| CN101150840A (en) * | 2006-09-20 | 2008-03-26 | 上海贝尔阿尔卡特股份有限公司 | Method and device for switching mobile relay station and its affiliated mobile station |
Non-Patent Citations (4)
| Title |
|---|
| 3GPP.Evolved Universal Terrestrial Radio Access (E-UTRA) |
| 3GPP.Evolved Universal Terrestrial Radio Access (E-UTRA) Radio Resource Control (RRC);Protocol specification(Release 8).《3GPP TS 36.331 V8.5.0 》.2009,63-69. * |
| Protocol specification(Release 8).《3GPP TS 36.331 V8.5.0 》.2009,63-69. |
| Radio Resource Control (RRC) |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101742601A (en) | 2010-06-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Tayyab et al. | A survey on handover management: From LTE to NR | |
| CN101742601B (en) | Switch method for guaranteeing business service quality in relay system | |
| CN100486352C (en) | Switching method in wireless mobile communication system and system | |
| JP6612213B2 (en) | Interference measurement method and apparatus for inter-cell interference control in a wireless communication system | |
| KR100827169B1 (en) | Method for handoff in a communication system with smart antenna | |
| CN102300274A (en) | Geographical-position-information-based fast handover method for time-division duplex long term evolution (TD-LTE) system | |
| CN103582091A (en) | Method and device for base station energy-saving operation in high-speed rail private network | |
| CN104581849A (en) | Residential quarter switch method | |
| CN102217343A (en) | Transmission method, apparatus and system for uplink transmission diversity | |
| US20100232389A1 (en) | Method and system for high speed intra-domain mobility management using dual interfaces in wireless lan/man | |
| US10674418B2 (en) | Terminal device, telecommunications networks and methods | |
| JP4983809B2 (en) | Base station apparatus and cell switching determination method | |
| Puttonen et al. | On LTE performance trade-off between connected and idle states with always-on type applications | |
| KR20110085521A (en) | Apparatus and method for controlling transmission power in wireless communication system | |
| Neeraja et al. | A comparative study on handoff algorithms for GSM and CDMA cellular networks | |
| JP4856243B2 (en) | Best effort type macro diversity | |
| CN103167567A (en) | Method and device for mobile terminal to switch base stations | |
| CN100391301C (en) | Method for determining initial access power after mobile station switching | |
| KR101892927B1 (en) | A method for controlling operation of a compact base station and the small base station | |
| EP3873158A1 (en) | Wireless communication for vehicle based node | |
| CN104244353A (en) | Communication method, radio network controller, and user equipment | |
| Deng et al. | GEO satellite communications system soft handover algorithm based on residence time | |
| WO2006081711A1 (en) | A method of controlling measurement between systems and measurement between frequencys | |
| CN103442401B (en) | The processing method of uplink authorization information, terminal and the network equipment under a kind of soft handover | |
| CN101185351B (en) | Method for controlling macro diversity mode based on the user's QoS requirement difference |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120314 Termination date: 20151224 |
|
| EXPY | Termination of patent right or utility model |