CN101562821B - Method for ensuring stability of service transmission in wireless communication system - Google Patents
Method for ensuring stability of service transmission in wireless communication system Download PDFInfo
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- CN101562821B CN101562821B CN200810104161XA CN200810104161A CN101562821B CN 101562821 B CN101562821 B CN 101562821B CN 200810104161X A CN200810104161X A CN 200810104161XA CN 200810104161 A CN200810104161 A CN 200810104161A CN 101562821 B CN101562821 B CN 101562821B
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Abstract
The invention provides a method capable of reliably sending service reconfiguring information in time when channel conditions are poor, thereby the method enables terminals to correctly adjust serviceconfiguration parameters in time to ensure the stability of service transmission.
Description
Technical field
The present invention relates to a kind of in wireless communication system, the method that ensures stability of service transmission.
Background technology
In wireless communication system, the characteristic of channel is by the propagation environment of radio wave decision, and communication environments itself is quite complicated, and this just makes that the characteristic of wireless channel is also very complicated.Especially in mobile radio channel, the decline of signal (being the rapid drawdown of signal strength signal intensity) can often take place.
When need communicate by letter with the terminal in the base station; The base station can be provided with certain business configuration according to current channel condition; Be handed down to the terminal again, the terminal will receive or send Traffic Channel according to the parameter request in the business configuration (like coded system, code rate, modulation system etc.).When channel condition changed, original business configuration possibly readjusted, and as reducing order of modulation or code check, using as far as possible reliably, modulation coding mode guarantees that professional reception is correct.
In traditional wireless communication system, the reallocation message of base station meeting issuing service configuration is in time adjusted the parameter that Traffic Channel is sent and received in order to the notice terminal.This reallocating method has a weakness; Be reallocation message along with Traffic Channel issues, this message is still followed the parameter request of original business configuration in Base-Band Processing, so when decline appears in channel; This reallocation message probably can't correctly be resolved at receiving terminal; Cause down the complete mistake of up reception Traffic Channel, can't correctly communicating by letter with the terminal in the base station always, has had a strong impact on the robustness of traffic channel transmission.
Therefore, when channel condition was very poor, we are badly in need of, and a kind of mechanism in time sent and reception business configuration reconfiguration message, guarantees the correct reception of up-downgoing Traffic Channel as far as possible, avoids the situation of long-time error communications to produce as far as possible.
Summary of the invention
The present invention proposes a kind of method; Promptly receive the uplink service mistake continuously in the base station; Perhaps the base station receives the downlink business of self terminal to receive under the situation of error feedback continuously; In time adjust the parameter request of business configuration, and send the reprovision requirement of business configuration with the down channel of a special use.
When the base station received the uplink service mistake continuously, the base station can be adjusted the uplink service configuration parameter separately, also can adjust descending simultaneously and the uplink service configuration parameter; When the base station received the reception downlink business error feedback of self terminal continuously, the downlink business configuration parameter need be adjusted in the base station.
The mapping relations of this dedicated downlink channel and physical sub-channels are in system configuration, to be accomplished and be fixed up by the base station, and the physical sub-channels that this fixed position only need be monitored in the terminal just can detect the situation that issues of this private subchannel.In addition; The business configuration parameter of this dedicated downlink channel is fixed; And be set at lower modulation and coded system, guaranteeing the terminal when channel condition is poor, can correct Solution separate out carry in this dedicated downlink channel following the uplink service reconfiguration message.
After the terminal correctly receives this dedicated channel, parse the business configuration reconfiguration message that wherein carries, adjust the business configuration parameter that oneself receives and send.Through after the business configuration reprovision, guarantee down the reverse link traffic channel transmission continue to carry out smoothly, guaranteed the sane of communication.
Description of drawings
Fig. 1 is the transmission flow sketch map of ECCH in the SCDMA system of broadband wireless communication;
Fig. 2 is the reception schematic flow sheet of ECCH in the SCDMA system of broadband wireless communication.
Embodiment
The present invention proposes a kind of method; Promptly receive the uplink service mistake continuously in the base station; Perhaps the base station receives the downlink business of self terminal to receive under the situation of error feedback continuously; In time adjust the parameter request of business configuration, and send the reprovision requirement of business configuration with the down channel of a special use.
When the base station received the uplink service mistake continuously, the base station can be adjusted the uplink service configuration parameter separately, also can adjust descending simultaneously and the uplink service configuration parameter; When the base station received the downlink business of self terminal to receive error feedback continuously, the downlink business configuration parameter need be adjusted in the base station.
The mapping relations of this dedicated downlink channel and physical sub-channels are in system configuration, to be accomplished and be fixed up by the base station, and the physical sub-channels that this fixed position only need be monitored in the terminal just can detect the situation that issues of this private subchannel.In addition; The business configuration parameter of this dedicated downlink channel is fixed; And be set at lower modulation and coded system, guaranteeing the terminal when channel condition is poor, can correct Solution separate out carry in this dedicated downlink channel following the uplink service reconfiguration message.
After the terminal correctly receives this dedicated channel, parse the business configuration reconfiguration message that wherein carries, adjust the business configuration parameter that oneself receives and send.Through after the business configuration reprovision, guarantee down the reverse link traffic channel transmission continue to carry out smoothly, guaranteed the sane of communication.
Be that example is explained practical implementation method of the present invention with the SCDMA system of broadband wireless communication below, but method described herein is not limited only to the SCDMA system.
In the SCDMA system of broadband wireless communication, set a kind of DPCH, i.e. emergency control channel (ECCH).The effect of this channel is when descending channel condition is very poor, to use this channel to guarantee that link is sane.This channel adopts the QPSK modulation system, and its coding adopts the RS coding, and code check is 2.5kbps.
When channel condition was very poor, the base station may receive the uplink service mistake continuously, perhaps received the downlink business of self terminal to receive error feedback continuously.At this moment, the base station just uses the ECCH channel to carry out emergency treatment.
The transmission flow of ECCH is following:
When 1, base station and terminal communication began, the sub-channel positions that the good ECCH of base station configuration is corresponding (being arranged to first subchannel of traffic sub channel set) also was handed down to the terminal;
2, base station and terminal proper communication;
3,, the base station will issue ECCH when detecting following two kinds of situation:
3.1 the continuous variation of reverse link traffic channel (signal to noise ratio of business information CRC check mistake or Traffic Channel is very poor) that the base station receives; Can not support original business configuration; The base station will be reset the uplink service configuration or reset descending and the uplink service configuration, reduces the order of modulation in original business configuration;
3.2 the terminal report is received in the base station, the Traffic Channel that receives multiframe continuously is all very poor, and the downlink business configuration will be reset in the base station, reduces the order of modulation in original downlink business configuration;
4, the base station continuous multiple frames is sent this depression of order information on the ECCH channel.
The reception flow process of ECCH is following:
1, the ECCH channel is monitored at the terminal always in communication process, through the CRC check correctness of the ECCH channel that receives, judges whether this frame contains the ECCH channel, and adjudicates the reliability that increases judgement through the accumulation of multiframe;
2, when terminal parses ECCH channel error, then continue to use original business configuration mode and base station communication; When terminal parses ECCH channel continuous multiple frames is correct, then further parse the professional reconfiguration message that carries in the ECCH channel, to down the order of modulation of uplink service adjust accordingly.
Claims (7)
- One kind in wireless communication system, can be when the channel condition variation, guarantee that the terminal receives service in base station configuration reconfiguration message smoothly, thereby guarantee the sane method of professional transmission, it is characterized in that:Use a kind of down channel of special use to send the business configuration reconfiguration message, the position and the modulation coding mode of this dedicated downlink channel are all fixed;Receive the physical channel of this fixed position, use this fixing modulation coding mode parameter to receive and resolve reconfiguration message.
- 2. method according to claim 1 is characterized in that, the modulation coding mode of said dedicated downlink channel is set to: guarantee that in bad channel conditions the terminal can correctly receive the information of this dedicated downlink channel.
- 3. method according to claim 1 is characterized in that, the condition that said dedicated downlink channel issues is to make mistakes when receiving uplink service information continuously in the base station.
- 4. method according to claim 1 is characterized in that, the condition that said dedicated downlink channel issues is that the base station is received the reception downlink business information errors of terminal feedback continuously.
- 5. method according to claim 1 is characterized in that, receiving terminal is monitored the physical channel of the corresponding fixed position of dedicated downlink channel always.
- 6. method according to claim 3 is characterized in that, issues under the condition said, and the business configuration reconfiguration message that send the base station can be to adjust the uplink service configuration parameter separately, also can be to adjust descending simultaneously and the uplink service configuration parameter.
- 7. method according to claim 4 is characterized in that, issues under the condition said, and the business configuration reconfiguration message that send the base station need be adjusted the downlink business configuration parameter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810104161XA CN101562821B (en) | 2008-04-16 | 2008-04-16 | Method for ensuring stability of service transmission in wireless communication system |
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| CN200810104161XA CN101562821B (en) | 2008-04-16 | 2008-04-16 | Method for ensuring stability of service transmission in wireless communication system |
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| CN101562821B true CN101562821B (en) | 2012-01-04 |
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| CN106714307A (en) * | 2015-07-15 | 2017-05-24 | 北京信威通信技术股份有限公司 | Method for performing resource allocation through emergency channels |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1366781A (en) * | 2000-04-17 | 2002-08-28 | 摩托罗拉公司 | Apparatus and method for providing separate forward dedicated and shared control channels in communications system |
| US6876295B1 (en) * | 1998-12-16 | 2005-04-05 | Symbol Technologies, Inc. | Wireless communication devices configurable via passive tags |
| CN1708149A (en) * | 2004-06-07 | 2005-12-14 | 上海贝尔阿尔卡特股份有限公司 | Method and base station for adaptive regulating and modulating coding mode and/or emission power |
| EP1890432A2 (en) * | 2006-08-18 | 2008-02-20 | Fujitsu Ltd. | Assigning channels in a wireless network |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6876295B1 (en) * | 1998-12-16 | 2005-04-05 | Symbol Technologies, Inc. | Wireless communication devices configurable via passive tags |
| CN1366781A (en) * | 2000-04-17 | 2002-08-28 | 摩托罗拉公司 | Apparatus and method for providing separate forward dedicated and shared control channels in communications system |
| CN1708149A (en) * | 2004-06-07 | 2005-12-14 | 上海贝尔阿尔卡特股份有限公司 | Method and base station for adaptive regulating and modulating coding mode and/or emission power |
| EP1890432A2 (en) * | 2006-08-18 | 2008-02-20 | Fujitsu Ltd. | Assigning channels in a wireless network |
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Application publication date: 20091021 Assignee: BEIJING XINYOUDA VIDEO TECHNOLOGY CO., LTD. Assignor: Xinwei Communications Technological Co., Ltd., Beijing Contract record no.: 2014110000021 Denomination of invention: Method for ensuring stability of service transmission in wireless communication system Granted publication date: 20120104 License type: Exclusive License Record date: 20140526 |
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