CN102665244B - Method and device for switching data transmission modes - Google Patents
Method and device for switching data transmission modes Download PDFInfo
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- CN102665244B CN102665244B CN201210115637.6A CN201210115637A CN102665244B CN 102665244 B CN102665244 B CN 102665244B CN 201210115637 A CN201210115637 A CN 201210115637A CN 102665244 B CN102665244 B CN 102665244B
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Abstract
The invention relates to a method and a device for switching data transmission modes. The method comprises the following steps: when the data transmission modes are pre-switched, using a data transmission mode to be switched to transmit new data packets in a time threshold value and using a current data transmission mode to transmit retransmitted data packets; carrying out statistics on a first packet error rate of using the data transmission mode to be switched to transmit the new data packets and a second packet error rate of using a current data transmission mode to transmit the retransmitted data packets in the time threshold value; and when the first packet error rate is greater than a packet error rate threshold value, switching to the data transmission mode to be switched from the current data transmission mode so as to transmit the data packets. According to the method and the device for switching the modes, which are disclosed by the embodiment of the invention, in the time threshold value, the first packet error rate of using the data transmission mode to be switched to transmit the new data packets is compared with the packet error rate threshold value and only when the first packet error rate is not greater than the packet error rate threshold value, the switching of the data transmission modes can be carried out, so that the stability and the reliability after the data transmission modes are switched are improved.
Description
Technical field
The present invention relates to moving communicating field, particularly relate to the method and apparatus that a kind of data-transmission mode switches.
Background technology
In the communications field, along with multiple-input, multiple-output (Multiple Input Multiple Output, MIMO) development of technology, World Interoperability for Microwave Access, WiMax (Worldwide Interoperability for Microwave Access, and Long Term Evolution (Long Term Evolution WiMAX), etc. LTE) there is a lot of pattern relevant to MIMO in standard, such as diversity, multiplexing, Beamforming etc., relate to the problem switched between each pattern thus, and due to switching before pattern can relate to pattern switch after robustness.
Existing mode switching method is base station (Base Station, BS) according to terminal (Subscriber Station, SS) information such as signal determines whether to carry out pattern switching, after switching, terminal is switched to pattern 2 by pattern 1, BS sends new data to terminal 2 times in pattern, a kind of data-transmission mode is kept, even if there is HARQ retransmission data packet may before switching; Just using new model after switching, is that actual pattern switches.
Because BS and SS for knowing the specific performance of the pattern after switching, if the pattern before the Performance Ratio switching of the pattern after switching is also bad, cannot can cause deterioration and the table tennis of performance, bad stability after switching like this.
Summary of the invention
Embodiments provide the method and apparatus that a kind of data-transmission mode switches, the performance of the data-transmission mode after switching can be learnt, then judge whether to carry out data-transmission mode switching, prevent the generation of penalty and bad stability.
Embodiments provide a kind of method that data-transmission mode switches, it is characterized in that, described method comprises:
During data-transmission mode pre-switch, in time threshold, use to be switched data-transmission mode to transmit new data packets, use present data transmission mode transfer retransmission data packet may;
Statistics, in time threshold, uses to be switched data-transmission mode to transmit the first Packet Error Ratio of new data packets, and uses the second Packet Error Ratio of present data transmission mode transfer retransmission data packet may;
When the first Packet Error Ratio is not more than Packet Error Ratio threshold value, be switched to be switched data-transmission mode transmission packet from present data transmission pattern.
The embodiment of the present invention additionally provides the device that a kind of pattern switches, and it is characterized in that, described device comprises:
Transmission unit, during for data-transmission mode pre-switch, uses to be switched data-transmission mode to transmit new data packets, uses present data transmission mode transfer retransmission data packet may in time threshold;
Statistic unit, for statistics in time threshold, uses to be switched data-transmission mode to transmit the first Packet Error Ratio of packet, and uses the second Packet Error Ratio of present data transmission mode transfer retransmission data packet may;
Switch unit, for when the first Packet Error Ratio is not more than Packet Error Ratio threshold value, is switched to be switched data-transmission mode transmission packet from present data transmission pattern.
The method and apparatus that embodiment of the present invention pattern switches, according within time threshold, the first Packet Error Ratio of to be switched data-transmission mode transmission new data packets and Packet Error Ratio threshold value is used to compare, only have and just carry out data-transmission mode switching when satisfied first Packet Error Ratio is not more than Packet Error Ratio threshold value, improve the stability after data-transmission mode switching and reliability.
Accompanying drawing explanation
Fig. 1 is the method flow diagram that embodiment of the present invention data-transmission mode switches;
Fig. 2 is the device schematic diagram that embodiment of the present invention data-transmission mode switches.
Embodiment
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
The embodiment of the present invention is when for carrying out data-transmission mode switching, utilize in time threshold, utilize the Packet Error Ratio that to be switched data-transmission mode transmits new data packets to sound out, if sound out successfully, then carry out data-transmission mode switching, if data-transmission mode is soundd out unsuccessful, then keep former data-transmission mode.
Fig. 1 is the method flow diagram that embodiment of the present invention data-transmission mode switches, and as shown in the figure, the present embodiment specifically comprises the steps:
Step 101, judges whether to carry out data-transmission mode pre-switch;
Judge whether that the method for carrying out data-transmission mode switching has a lot, as: judge whether to carry out data-transmission mode pre-switch according to the Packet Error Ratio under present data transmission pattern or spectrum efficiency, if time the Packet Error Ratio under present data transmission pattern or spectrum efficiency reach the pre-switch condition that critical value namely presets.
Data-transmission mode has a lot, such as transmit diversity and multiplexer mode, Beamforming pattern and non-BF pattern;
Step 102, adds up in time threshold, uses to be switched data-transmission mode to transmit the first Packet Error Ratio of new data packets, and uses the second Packet Error Ratio of present data transmission mode transfer retransmission data packet may;
The object of this step is exactly the mode of carrying out data-transmission mode exploration, namely log-on data transmission mode switching timer TimerMIMOSwitch carries out timing to time threshold, in time threshold, Packet Error Ratio when using to be switched data-transmission mode transmission new data packets is the first Packet Error Ratio, and utilize present data transmission mode transfer hybrid automatic repeat-request (Hybird Automatic Repeat Request, HARQ) packet;
Step 103, adds up in time threshold, uses to be switched data-transmission mode to transmit the first Packet Error Ratio of new data packets, and uses the second Packet Error Ratio of present data transmission mode transfer retransmission data packet may;
Utilize TimerMIMOSwitch log-on data transmission mode switching timer when step 102 brings into use two kinds of data-transmission modes to transmit different packets; The Packet Error Ratio added up in time threshold in step 103 is exactly in data-transmission mode switch overtime, statistics transmission mode switching timer is from till starting to time-out, use to be switched data-transmission mode to transmit the first Packet Error Ratio PER1 of new data packets, and use the second Packet Error Ratio PER2 of present data transmission mode transfer retransmission data packet may.
Step 104, judges whether to carry out data-transmission mode switching according to Packet Error Ratio;
The condition judging whether to carry out data-transmission mode switching according to Packet Error Ratio has a lot, namely when not meeting switching condition, do not carry out data-transmission mode switching can be better than carrying out data-transmission mode switching, such as the PERth when the first Packet Error Ratio is not more than Packet Error Ratio threshold value, is switched to be switched data-transmission mode from present data transmission pattern; Do not carry out data-transmission mode switching when the first Packet Error Ratio is greater than Packet Error Ratio threshold value, still use present data transmission pattern.
Above-described embodiment is the embodiment of the method that data-transmission mode switches, and the following device embodiment being data-transmission mode and switching, the device utilizing data-transmission mode to switch also can realize the present invention.
Fig. 2 is the device schematic diagram that embodiment of the present invention data-transmission mode switches, and as shown in the figure, the device that the data-transmission mode of the present embodiment switches specifically comprises: judging unit 10, transmission unit 11, statistic unit 12 and switch unit 13.
Judging unit 10 is for judging whether to carry out data-transmission mode pre-switch according to the Packet Error Ratio under present data transmission pattern or spectrum efficiency.When transmission unit 11 is for data-transmission mode pre-switch, in time threshold, use to be switched data-transmission mode to transmit new data packets, use present data transmission mode transfer retransmission data packet may.Statistic unit 12 for statistics, uses to be switched data-transmission mode to transmit the first Packet Error Ratio of packet, and uses the second Packet Error Ratio of present data transmission mode transfer retransmission data packet may in time threshold.Switch unit 13, for when the first Packet Error Ratio is not more than Packet Error Ratio threshold value, is switched to be switched data-transmission mode transmission packet from present data transmission pattern.
Statistic unit 12 utilizes data-transmission mode switching timer to carry out timing to time threshold, time transmission unit 11 starts to utilize present data transmission mode transfer retransmission data packet may, data-transmission mode switching timer starts, when described timer expiry, arrive described time threshold, the second Packet Error Ratio of present data transmission mode transfer retransmission data packet may is utilized in statistic unit 12 timing statistics threshold value, and statistics is in time threshold, to be switched data-transmission mode is used to transmit the first Packet Error Ratio of packet.
The method and apparatus that embodiment of the present invention data-transmission mode switches, according within time threshold, the first Packet Error Ratio of to be switched data-transmission mode transmission new data packets and Packet Error Ratio threshold value is used to compare, only have and just carry out data-transmission mode switching when satisfied first Packet Error Ratio is not more than Packet Error Ratio threshold value, be that a kind of heuristic data-transmission mode switches, ensure the robustness of transfer of data after switching; Prevent the defect of stability and poor reliability, prevent unnecessary data-transmission mode table tennis and unnecessary data-transmission mode handover overhead from data-transmission mode is switched evidence-based simultaneously, improve the stability after data-transmission mode switching and reliability.
Professional should recognize further, in conjunction with unit and the algorithm steps of each example of embodiment disclosed herein description, can realize with electronic hardware, computer software or the combination of the two, in order to the interchangeability of hardware and software is clearly described, generally describe composition and the step of each example in the above description according to function.These functions perform with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.Professional and technical personnel can use distinct methods to realize described function to each specifically should being used for, but this realization should not thought and exceeds scope of the present invention.
The software module that the method described in conjunction with embodiment disclosed herein or the step of algorithm can use hardware, processor to perform, or the combination of the two is implemented.Software module can be placed in the storage medium of other form any known in random asccess memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field.
Above-described embodiment; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only the specific embodiment of the present invention; the protection range be not intended to limit the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. a method for data-transmission mode switching, it is characterized in that, described method comprises:
During data-transmission mode pre-switch, in time threshold, use to be switched data-transmission mode to transmit new data packets, use present data transmission mode transfer retransmission data packet may;
Statistics, in time threshold, uses to be switched data-transmission mode to transmit the first Packet Error Ratio of new data packets, and uses the second Packet Error Ratio of present data transmission mode transfer retransmission data packet may;
When the first Packet Error Ratio is not more than Packet Error Ratio threshold value, be switched to be switched data-transmission mode transmission packet from present data transmission pattern.
2. the method for data-transmission mode switching according to claim 1, it is characterized in that, also comprised before during described data-transmission mode pre-switch, judge whether to carry out data-transmission mode pre-switch according to the Packet Error Ratio under present data transmission pattern or spectrum efficiency.
3. the method that switches of data-transmission mode according to claim 1, is characterized in that, is describedly specially in time threshold: data-transmission mode switching timer is from till starting to time-out.
4. the method for data-transmission mode switching according to claim 1, it is characterized in that, described use present data transmission mode transfer retransmission data packet may is specially: use present data transmission mode transfer hybrid automatic repeat-request packet.
5. a device for data-transmission mode switching, it is characterized in that, described device comprises:
Transmission unit, during for data-transmission mode pre-switch, uses to be switched data-transmission mode to transmit new data packets, uses present data transmission mode transfer retransmission data packet may in time threshold;
Statistic unit, for statistics in time threshold, uses to be switched data-transmission mode to transmit the first Packet Error Ratio of packet, and uses the second Packet Error Ratio of present data transmission mode transfer retransmission data packet may;
Switch unit, for when the first Packet Error Ratio is not more than Packet Error Ratio threshold value, is switched to be switched data-transmission mode transmission packet from present data transmission pattern.
6. the device of data-transmission mode switching according to claim 5, it is characterized in that, described device also comprises, judging unit, for judging whether to carry out data-transmission mode pre-switch according to the Packet Error Ratio under present data transmission pattern or spectrum efficiency.
7. the device of data-transmission mode switching according to claim 5, it is characterized in that, described statistic unit utilizes data-transmission mode switching timer to carry out timing to described time threshold, when described timer expiry, arrives described time threshold.
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| CN201210115637.6A CN102665244B (en) | 2012-04-19 | 2012-04-19 | Method and device for switching data transmission modes |
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| CN201210115637.6A CN102665244B (en) | 2012-04-19 | 2012-04-19 | Method and device for switching data transmission modes |
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| CN104202255A (en) * | 2014-08-26 | 2014-12-10 | 浪潮(北京)电子信息产业有限公司 | Efficient multi-link data transmission implementation method |
| CN106557377A (en) * | 2015-09-25 | 2017-04-05 | 中兴通讯股份有限公司 | Data transfer control method, main process equipment, USB device and system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US6643322B1 (en) * | 2000-09-20 | 2003-11-04 | Aperto Networks, Inc. | Dynamic wireless link adaptation |
| US7583637B2 (en) * | 2003-01-31 | 2009-09-01 | Alcatel-Lucent Usa Inc. | Methods of controlling data rate in wireless communications systems |
| CN101834879A (en) * | 2010-02-09 | 2010-09-15 | 北京中科大洋科技发展股份有限公司 | Intelligent efficient video/audio data transmission method adapted to different network environments |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6643322B1 (en) * | 2000-09-20 | 2003-11-04 | Aperto Networks, Inc. | Dynamic wireless link adaptation |
| US7583637B2 (en) * | 2003-01-31 | 2009-09-01 | Alcatel-Lucent Usa Inc. | Methods of controlling data rate in wireless communications systems |
| CN101834879A (en) * | 2010-02-09 | 2010-09-15 | 北京中科大洋科技发展股份有限公司 | Intelligent efficient video/audio data transmission method adapted to different network environments |
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