CN102340827B - Wireless communication system and method for adjusting use depth of buffering unit therein - Google Patents
Wireless communication system and method for adjusting use depth of buffering unit therein Download PDFInfo
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- CN102340827B CN102340827B CN201010230241.7A CN201010230241A CN102340827B CN 102340827 B CN102340827 B CN 102340827B CN 201010230241 A CN201010230241 A CN 201010230241A CN 102340827 B CN102340827 B CN 102340827B
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Abstract
The invention discloses a wireless communication system and a method for adjusting use depth of a buffering unit in the same. The wireless communication system comprises a receiving unit, a buffer unit, a judging unit and an adjusting unit; the receiving unit is used for receiving a signal stream; the buffer unit is coupled to the receiving unit and used for storing the signal stream in a use depth; the judging unit is coupled to the receiving unit and used for judging the signal receiving quality of the signal stream received by the receiving unit and generating a judgment result; and the adjusting unit is coupled to the judging unit and used for adjusting the use depth of the buffer unit according to the judgment result.
Description
Technical field
The present invention relates to a kind of wireless communication system, espespecially a kind of method and related wireless communication system thereof adjusting a use degree of depth of a buffer cell in a wireless communication system.
Background technology
In general, when multimedia packages such as transmission over networks video/voice, capital before being played, download in one piece of data to buffering area (Buffer) in advance and carry out buffered, when network be interfered and cause actual online speed to be less than data speed that broadcasting consumes time, playing program will take the data in this bit of buffering area, to avoid interruption or the interference of broadcasting, and the size of this block buffer mainly decides according to the patient delay of multimedia, but, on a wireless network, the change of transmission situation greatly, such as, short range transmission is fast, long-distance transmissions is slow, transmit smoothly time noiseless and have during interference and transmit often meeting hit, therefore, according to the buffering area of fixed size, when running into channel quality and being unstable, then usually cannot receiver, video and voice smoothly, the known mechanism being used for dynamic conditioning buffering area is all the delay situation that the package received by statistics past attempts postpones that situation estimates following package, and then adjust buffer size (namely postponing the time length play) accordingly, but, when instantaneous interference may be there is in wireless network environment, the reaction of this practice is slower.
Therefore, the size that how change of fast reaction wireless network environment adjusts buffering area is exactly a very important problem.
Summary of the invention
An object of the present invention is that providing a kind of adjusts method and the related wireless communication system thereof that one of a buffer cell uses the degree of depth, in a wireless communication system to solve the problem in prior art.
Embodiments of the invention disclose a kind of wireless communication system, and it includes a receiving element, a buffer cell, a judging unit and an adjustment unit.This receiving element is used for reception one signal crossfire.This buffer cell is coupled to this receiving element, and it uses the degree of depth to store this signal crossfire with one.This judging unit is coupled to this receiving element, is used for judging a signal receiving quality of this signal crossfire that this receiving element receives, and produces a judged result according to this.This adjustment unit is coupled to this judging unit, is used for according to this judged result to adjust this use degree of depth of this buffer cell.
Embodiments of the invention also disclose a kind of method adjusting a use degree of depth of a buffer cell in a wireless communication system.The method includes: receive a signal crossfire; This signal crossfire is stored with this use degree of depth; Judge a signal receiving quality of this signal crossfire received, and produce a judged result according to this; And this use degree of depth of this buffer cell is adjusted according to this judged result.
The invention has the advantages that the size utilizing prediction radio network information channel quality to carry out Dynamic controlling buffer cell, thus, can multimedia be allowed to play smoothly in response to the change of wireless network environment fast.In addition, another advantage of the present invention is to utilize first, second signal quality demand critical value of setting avoid adjusting continually the size of buffer cell and affect multimedia quality.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of an embodiment of wireless communication system of the present invention.
Fig. 2 is that buffer cell of the present invention uses the degree of depth to carry out the schematic diagram of storage assembly crossfire with one.
Fig. 3 is the flow chart that the present invention adjusts that one of a buffer cell uses an example operation of the method for the degree of depth in a wireless communication system.
Fig. 4 is the flow chart that the present invention adjusts that one of a buffer cell uses another example operation of the method for the degree of depth in a wireless communication system.
[main element symbol description]
100,300 wireless communication system 110 receiving elements
120 buffer cell 130 judging units
140 adjustment units
Embodiment
Please refer to Fig. 1, Fig. 1 is the schematic diagram of an embodiment of wireless communication system 100 of the present invention.As shown in Figure 1, wireless communication system 100 includes (but being not limited to) receiving element 110, buffer cell 120, judging unit 130 and adjustment unit 140.Receiving element 110 is used for reception one signal crossfire S, and buffer cell 120 is then be coupled to receiving element 110, and it uses degree of depth D to carry out storage assembly crossfire S with one.In addition, judging unit 130 is coupled to this receiving element 110, be used for judging a signal receiving quality Q of the signal crossfire S that receiving element 110 receives, and produce a judged result DR according to this, adjustment unit 140 is then be coupled to judging unit 130, be used for according to judged result DR to adjust the use degree of depth D of buffer cell 120, in the present embodiment, when judged result DR index signal quality of reception Q does not reach one first signal quality demand critical value TH1, adjustment unit 140 just increases the use degree of depth D of buffer cell 120, in addition, when judged result DR index signal quality of reception Q reaches a secondary signal quality requirement critical value TH2, adjustment unit 140 just reduces the use degree of depth D of buffer cell 120.
For example, can successfully broadcast to allow a video or voice, after receiving element 110 receives the signal crossfire S of this video or these voice, buffer cell 120 just can first initially use degree of depth DI (D=DI) to carry out storage assembly crossfire S with one, as shown in Figure 2, Fig. 2 is that buffer cell 120 of the present invention is with the schematic diagram using degree of depth D to carry out storage assembly crossfire S.Simultaneously, judging unit 130 also can judge whether the signal receiving quality Q of the signal crossfire S that receiving element 110 receives reaches the first signal quality demand critical value TH1, if signal receiving quality Q does not reach the first signal quality demand critical value TH1, namely the network channel quality representing current wireless communication system 100 is not good, now use degree of depth DI current for buffer cell 120 just can be increased to and use degree of depth D1 (D=D1 > DI) by adjustment unit 140, and this video or this voice can successfully be broadcasted; On the other hand, if signal receiving quality Q reaches secondary signal quality requirement critical value TH2 (in the present embodiment, TH2 > TH1), namely the network channel quality representing current wireless communication system 100 is better, and use degree of depth DI current for buffer cell 120 just can be reduced to and use degree of depth D2 (D=D2 < DI) by adjustment unit 140.Thus, after a reflector (not being shown in figure) sends the control signal of a stopping, because the use degree of depth of buffer cell 120 is decreased to D2, wireless communication system 100 just can perform the control signal of this stopping very soon; Moreover, if signal receiving quality Q is between the first signal quality demand critical value TH1 and secondary signal quality requirement critical value TH2, adjustment unit 140 does not just adjust the current use degree of depth D of buffer cell 120, thus, the size of buffer cell 120 can be avoided adjusting continually and affect multimedia quality.
Please referring again to Fig. 1, in the present embodiment, adjustment unit 140 is that a processor is implemented, and this processor utilizes execution one playing program to extract and processes the signal crossfire S stored by buffer cell 120.When judged result DR index signal quality of reception Q does not reach the first signal quality demand critical value TH1, now adjustment unit 140 just indicates this processor to reduce the extraction rate of buffer cell 120, for example, the extraction rate of this processor can be reduced by 20% (that is broadcasting speed slows down 20%); And when judged result DR index signal quality of reception Q reaches the first signal quality demand critical value TH1, now adjustment unit 140 just indicates this processor to increase the extraction rate of buffer cell 120, for example, the extraction rate of this processor can be increased by 20% (that is broadcasting speed accelerates 20%); Again for example, suppose that the use degree of depth D of buffer cell 120 stores 30 frame Frame, now this processor only can be play frame that even number (Even) numbers and not play the frame that odd number (Odd) numbers, and accelerates the extraction rate to buffer cell 120.
Please note, above-described embodiment a false alarm quantity (False alarm count), a cyclic redundancy check number of errors (CRC error counter) and a polymerization media access control protocol data unit sequence of subframes quantity (AMPDU subframe sequencenumber) can calculate signal receiving quality Q, because person familiar with the technology can the meaning of apparent false alarm quantity, cyclic redundancy check number of errors and polymerization media access control protocol data unit sequence of subframes quantity, for for purpose of brevity, therefore repeat no more in this.Please note, using above-mentioned parameter to calculate signal receiving quality Q and only as example, use is described, is not restrictive condition of the present invention, in other words, the practice spirit all according to the invention of every signal receiving quality that can be used for predicting radio network information channel quality, and fall into category of the present invention.
Please refer to Fig. 3, Fig. 3 is the flow chart that the present invention adjusts that one of a buffer cell uses an example operation of the method for the degree of depth in a wireless communication system, it comprises (but being not limited to), and following steps (please note, if can obtain result identical in fact, then these steps might not perform in accordance with the execution order shown in Fig. 3):
Step S300: start.
Step S310: receive a signal crossfire.
Step S320: use the degree of depth to store this train of signal with one and flow to a buffer cell.
Step S325: the signal receiving quality judging this signal crossfire received, and produce a judged result according to this.When judged result indicates this signal receiving quality not reach one first signal quality demand critical value, perform step S330; When judged result indicates this signal receiving quality to reach a secondary signal quality requirement critical value, perform step S340; Otherwise, get back to step S310.
Step S330: this use degree of depth increasing this buffer cell.
Step S340: this use degree of depth reducing this buffer cell.
The each element shown in each step shown in Fig. 3 and Fig. 1 of please arranging in pairs or groups can be understood each element and how to operate, and for for purpose of brevity, therefore repeats no more in this.Wherein, step S330 and step S340 is performed by adjustment unit 140.
Please refer to Fig. 4, Fig. 4 is the flow chart that the present invention adjusts that one of a buffer cell uses another example operation of the method for the degree of depth in a wireless communication system, it comprises (but being not limited to), and following steps (please note, if can obtain result identical in fact, then these steps might not perform in accordance with the execution order shown in Fig. 4):
Step S400: start.
Step S410: receive a signal crossfire.
Step S420: use the degree of depth to store this train of signal with one and flow to a buffer cell.
Step S425: the signal receiving quality judging this signal crossfire received, and produce a judged result according to this.When judged result indicates this signal receiving quality not reach one first signal quality demand critical value, perform step S430; When judged result indicates this signal receiving quality to reach a secondary signal quality requirement critical value, perform step S440; Otherwise, get back to step S410.
Step S430: the extraction rate reducing this buffer cell.
Step S440: the extraction rate increasing this buffer cell.
Please to arrange in pairs or groups each element shown in each step shown in Fig. 4 and Fig. 1, each element can be understood and how to operate, for for purpose of brevity, therefore repeat no more in this.Wherein, step S430 and step S440 is performed by this processor.
The step of above-mentioned each flow process be only the present invention for feasible embodiment, and unrestricted restrictive condition of the present invention, and when without prejudice to spirit of the present invention, these methods separately can comprise other intermediate steps or several step can be merged into one step, to do suitable change.
Above-described embodiment is only used for technical characteristic of the present invention is described, is not used for limiting to category of the present invention.As from the foregoing, the invention provides a kind of method and the related wireless communication system thereof that adjust a use degree of depth of a buffer cell in a wireless communication system, utilize prediction radio network information channel quality to carry out the size of Dynamic controlling buffer cell, the change that can respond wireless network environment is fast play smoothly to allow multimedia.In addition, first, second signal quality demand critical value of setting is utilized also can to avoid adjusting continually the size of buffer cell and affect multimedia quality.
The foregoing is only the preferred embodiments of the present invention, all equalizations done according to claims of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (8)
1. a wireless communication system, it includes:
One receiving element, is used for reception one signal crossfire;
One buffer cell, is coupled to described receiving element, uses the degree of depth to store described signal crossfire with one;
One judging unit, is coupled to described receiving element, is used for judging a signal receiving quality of the described signal crossfire that described receiving element receives, and produces a judged result according to this; And
One adjustment unit, is coupled to described judging unit, is used for according to described judged result to adjust the described use degree of depth of described buffer cell,
Wherein said adjustment unit is when described judged result indicates described signal receiving quality not reach one first signal quality demand critical value, increase the described use degree of depth of described buffer cell, wherein, described adjustment unit is when described judged result indicates described signal receiving quality to reach a secondary signal quality requirement critical value, reduce the described use degree of depth of described buffer cell, and wherein said adjustment unit is when described judged result indicates described signal receiving quality between described first signal quality demand critical value and described secondary signal quality requirement critical value, described adjustment unit does not adjust the described use degree of depth of described buffer cell.
2. system according to claim 1, wherein, described adjustment unit is a processor, be used for extracting and process the described signal crossfire stored by described buffer cell, and when described judged result indicates described signal receiving quality not reach one first signal quality demand critical value, described processor is used for reducing the extraction rate of described buffer cell.
3. system according to claim 1, wherein, described adjustment unit is a processor, be used for extracting and process the described signal crossfire stored by described buffer cell, and when described judged result indicates described signal receiving quality to reach a secondary signal quality requirement critical value, described processor is used for increasing the extraction rate of described buffer cell.
4. system according to claim 1, wherein, described judging unit calculates described signal receiving quality according to a false alarm quantity, a cyclic redundancy check number of errors and a polymerization media access control protocol data unit sequence of subframes quantity.
5. adjust the method that one of a buffer cell uses the degree of depth in a wireless communication system, include:
Receive a signal crossfire;
Described signal crossfire is stored with the described use degree of depth;
Judge a signal receiving quality of the described signal crossfire received, and produce a judged result according to this; And
The described use degree of depth of described buffer cell is adjusted according to described judged result,
Wherein when described judged result indicates described signal receiving quality not reach one first signal quality demand critical value, increase the described use degree of depth of described buffer cell, wherein, when described judged result indicates described signal receiving quality to reach a secondary signal quality requirement critical value, reduce the described use degree of depth of described buffer cell, and wherein when described judged result indicates described signal receiving quality between described first signal quality demand critical value and described secondary signal quality requirement critical value, the described use degree of depth of described buffer cell is not adjusted.
6. method according to claim 5, wherein, the step adjusting the described use degree of depth of described buffer cell according to described judged result includes:
Extract and process the described signal crossfire stored by described buffer cell; And
When described judged result indicates described signal receiving quality not reach one first signal quality demand critical value, reduce the extraction rate of described buffer cell.
7. method according to claim 5, wherein, the step adjusting the described use degree of depth of described buffer cell according to described judged result includes:
Extract and process the described signal crossfire stored by described buffer cell; And
When described judged result indicates described signal receiving quality to reach a secondary signal quality requirement critical value, increase the extraction rate of described buffer cell.
8. method according to claim 5, wherein, judges that the step of the described signal receiving quality of the described signal crossfire received includes:
Described signal receiving quality is calculated according to a false alarm quantity, a cyclic redundancy check number of errors and a polymerization media access control protocol data unit sequence of subframes quantity.
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| CN103379379B (en) * | 2012-04-13 | 2016-08-03 | 腾讯科技（深圳）有限公司 | Streaming media buffer playing method and device |
| CN102665131A (en) * | 2012-04-27 | 2012-09-12 | 山东省计算中心 | Video buffer method for receiving end of network video service system |
| CN107302502B (en) * | 2017-07-25 | 2020-02-07 | 武汉思创易控科技有限公司 | Terminal processing method and device |
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| CN101076989A (en) * | 2004-10-13 | 2007-11-21 | 高通股份有限公司 | De-jitter buffer adjustments based on estimated delay |
| CN101548500A (en) * | 2006-12-06 | 2009-09-30 | 艾利森电话股份有限公司 | Jitter buffer control |
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| CN101076989A (en) * | 2004-10-13 | 2007-11-21 | 高通股份有限公司 | De-jitter buffer adjustments based on estimated delay |
| CN101548500A (en) * | 2006-12-06 | 2009-09-30 | 艾利森电话股份有限公司 | Jitter buffer control |
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