CN102665244A - Method and device for switching data transmission modes - Google Patents
Method and device for switching data transmission modes Download PDFInfo
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- CN102665244A CN102665244A CN2012101156376A CN201210115637A CN102665244A CN 102665244 A CN102665244 A CN 102665244A CN 2012101156376 A CN2012101156376 A CN 2012101156376A CN 201210115637 A CN201210115637 A CN 201210115637A CN 102665244 A CN102665244 A CN 102665244A
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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, relate in particular 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; WiMAX) and Long Term Evolution (Long Term Evolution, LTE) etc. a lot of patterns relevant with MIMO appear in standard, for example branch collects; Multiplexing; Beamforming etc. relate to the problem of switching between each pattern thus, and since before the pattern switching can relate to the robustness after the mode switch.
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 mode switch, switches the terminal, back and switches to pattern 2 by pattern 1, and BS sends new data pattern 2 times to the terminal; Keep a kind of data-transmission mode before switching, even the HARQ retransmission data packet may is arranged; Just using new model after the switching, is actual mode switch.
Because BS and SS can't desire know the concrete performance of the pattern after switching,, can cause the deterioration and the table tennis of performance like this after the switching, bad stability if the performance of the pattern after switching is also more bad than the pattern before switching.
Summary of the invention
The method and apparatus that the embodiment of the invention provides a kind of data-transmission mode to switch can be learnt to judge whether the performance of the data-transmission mode after the switching to carry out data-transmission mode then and switch, and prevents the generation of mis-behave and bad stability.
The method that the embodiment of the invention provides a kind of data-transmission mode to switch is characterized in that said method comprises:
During the data-transmission mode pre-switch, in time threshold, use to be switched data-transmission mode transmission new data packets, use current data transmission mode transmission retransmission data packet may;
Statistics is used first Packet Error Ratio of to be switched data-transmission mode transmission new data packets and is used the current data transmission mode to transmit second Packet Error Ratio of retransmission data packet may in time threshold;
When first Packet Error Ratio is not more than the Packet Error Ratio threshold value, switch to be switched data-transmission mode transmits data packets from the current data transmission mode.
The embodiment of the invention also provides a kind of device of mode switch, it is characterized in that, said device comprises:
Transmission unit when being used for the data-transmission mode pre-switch, uses to be switched data-transmission mode transmission new data packets in time threshold, use current data transmission mode transmission retransmission data packet may;
Statistic unit is used for statistics in time threshold, uses first Packet Error Ratio of to be switched data-transmission mode transmits data packets and uses the current data transmission mode to transmit second Packet Error Ratio of retransmission data packet may;
Switch unit is used for when first Packet Error Ratio is not more than the Packet Error Ratio threshold value, switches to be switched data-transmission mode transmits data packets from the current data transmission mode.
The method and apparatus of embodiment of the invention mode switch; According within time threshold; Use first Packet Error Ratio and the Packet Error Ratio threshold value of to be switched data-transmission mode transmission new data packets to compare; Have only and when satisfied first Packet Error Ratio is not more than the Packet Error Ratio threshold value, just carry out the data-transmission mode switching, improve stability and reliability after data-transmission mode switches.
Description of drawings
The method flow diagram that Fig. 1 switches for embodiment of the invention data-transmission mode;
Fig. 2 is an embodiment of the invention data-transmission mode device for switching sketch map.
Embodiment
Through accompanying drawing and embodiment, technical scheme of the present invention is done further detailed description below.
The embodiment of the invention is when desiring to carry out the data-transmission mode switching; Be utilized in and utilize the Packet Error Ratio of to be switched data-transmission mode transmission new data packets to sound out in the time threshold; If sound out successfully; Then carry out data-transmission mode and switch, unsuccessful if data-transmission mode is soundd out, then keep former data-transmission mode.
The method flow diagram that Fig. 1 switches for embodiment of the invention data-transmission mode, as shown in the figure, present embodiment specifically comprises the steps:
Judging whether to desire to carry out the method that data-transmission mode switches has a lot; As: judge whether to carry out the data-transmission mode pre-switch according to Packet Error Ratio under the current data transmission mode or spectrum efficiency, if when Packet Error Ratio under the current data transmission mode or spectrum efficiency have reached the just predefined pre-switch condition of critical value.
Data-transmission mode has a lot, for example transmit diversity and multiplexer mode, Beamforming pattern and non-BF pattern;
The purpose of this step is exactly to carry out the mode that data-transmission mode is soundd out; Be that 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 to transmit new data packets is first Packet Error Ratio, and utilizes the transmission of current data transmission mode to mix automatic repeat requests (Hybird Automatic Repeat Request, HARQ) packet;
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; At the Packet Error Ratio of step 103 statistics in time threshold is exactly in the data-transmission mode switch overtime; Statistics transmission mode switching timer from start to overtime till; Use the first Packet Error Ratio PER1 of to be switched data-transmission mode transmission new data packets and use the current data transmission mode to transmit the second Packet Error Ratio PER2 of retransmission data packet may.
Judge whether that according to Packet Error Ratio the condition of carrying out the data-transmission mode switching has a lot; Just when not satisfying switching condition; Do not carry out the data-transmission mode switching and can be superior to carrying out the data-transmission mode switching; For example PERth when first Packet Error Ratio is not more than the Packet Error Ratio threshold value switches to be switched data-transmission mode from the current data transmission mode; Do not switch when first Packet Error Ratio does not carry out data-transmission mode during greater than the Packet Error Ratio threshold value, still use the current data transmission mode.
The foregoing description is the method embodiment that data-transmission mode switches, and following be data-transmission mode device for switching embodiment, utilize the data-transmission mode device for switching also can realize the present invention.
Fig. 2 is embodiment of the invention data-transmission mode device for switching sketch map, and is as shown in the figure, and the data-transmission mode device for switching of present embodiment specifically comprises: judging unit 10, transmission unit 11, statistic unit 12 and switch unit 13.
The method and apparatus that embodiment of the invention data-transmission mode switches; According within time threshold; Use first Packet Error Ratio and the Packet Error Ratio threshold value of to be switched data-transmission mode transmission new data packets to compare; Having only and when satisfied first Packet Error Ratio is not more than the Packet Error Ratio threshold value, just carry out the data-transmission mode switching, is that a kind of heuristic data-transmission mode switches, and guarantees to switch the robustness of back transfer of data; Prevent to produce the defective of stability and poor reliability; Prevent that simultaneously unnecessary data transmission mode table tennis and unnecessary data transmission mode handover overhead from making data-transmission mode switch and having according to complying with, improve stability and reliability after data-transmission mode switches.
The professional should further recognize; The unit and the algorithm steps of each example of describing in conjunction with embodiment disclosed herein; Can realize with electronic hardware, computer software or the combination of the two; For the interchangeability of hardware and software clearly is described, the composition and the step of each example described prevailingly according to function in above-mentioned explanation.These functions still are that software mode is carried out with hardware actually, depend on the application-specific and the design constraint of technical scheme.The professional and technical personnel can use distinct methods to realize described function to each certain applications, but this realization should not thought and exceeds scope of the present invention.
The software module that the method for describing in conjunction with embodiment disclosed herein or the step of algorithm can use hardware, processor to carry out, perhaps the combination of the two is implemented.Software module can place the storage medium of any other form 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 the technical field.
Above-described embodiment; The object of the invention, technical scheme and beneficial effect have been carried out further explain, and institute it should be understood that the above is merely embodiment of the present invention; And be not used in qualification protection scope of the present invention; All within spirit of the present invention and principle, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. the method switched of a data-transmission mode is characterized in that said method comprises:
During the data-transmission mode pre-switch, in time threshold, use to be switched data-transmission mode transmission new data packets, use current data transmission mode transmission retransmission data packet may;
Statistics is used first Packet Error Ratio of to be switched data-transmission mode transmission new data packets and is used the current data transmission mode to transmit second Packet Error Ratio of retransmission data packet may in time threshold;
When first Packet Error Ratio is not more than the Packet Error Ratio threshold value, switch to be switched data-transmission mode transmits data packets from the current data transmission mode.
2. the method that data-transmission mode according to claim 1 switches; It is characterized in that; Also comprised before during said data-transmission mode pre-switch, judge whether to carry out the data-transmission mode pre-switch according to Packet Error Ratio under the current data transmission mode or spectrum efficiency.
3. the method that data-transmission mode according to claim 1 switches; It is characterized in that; Saidly in time threshold, be specially: log-on data transmission mode switching timer is carried out timing to said time threshold, when said timer expiry, arrives said time threshold.
4. the method that data-transmission mode according to claim 1 switches is characterized in that, said use current data transmission mode transmission retransmission data packet may is specially: use the transmission of current data transmission mode to mix automatic repeat requests data bag.
5. a data-transmission mode device for switching is characterized in that, said device comprises:
Transmission unit when being used for the data-transmission mode pre-switch, uses to be switched data-transmission mode transmission new data packets in time threshold, use current data transmission mode transmission retransmission data packet may;
Statistic unit is used for statistics in time threshold, uses first Packet Error Ratio of to be switched data-transmission mode transmits data packets and uses the current data transmission mode to transmit second Packet Error Ratio of retransmission data packet may;
Switch unit is used for when first Packet Error Ratio is not more than the Packet Error Ratio threshold value, switches to be switched data-transmission mode transmits data packets from the current data transmission mode.
6. data-transmission mode device for switching according to claim 5 is characterized in that said device also comprises, judging unit is used for judging whether to carry out the data-transmission mode pre-switch according to Packet Error Ratio under the current data transmission mode or spectrum efficiency.
7. data-transmission mode device for switching according to claim 5 is characterized in that, said statistic unit utilizes the data-transmission mode switching timer that said time threshold is carried out timing, when said timer expiry, arrives said time threshold.
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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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 |
WO2017049973A1 (en) * | 2015-09-25 | 2017-03-30 | 中兴通讯股份有限公司 | Data transmission control method, host device, usb device and system |
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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)
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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 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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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 |
WO2017049973A1 (en) * | 2015-09-25 | 2017-03-30 | 中兴通讯股份有限公司 | Data transmission control method, host device, usb device and system |
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