CN101764680A - Method for increasing transmission efficiency of data services in mobile communication system - Google Patents
Method for increasing transmission efficiency of data services in mobile communication system Download PDFInfo
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- CN101764680A CN101764680A CN200810189266A CN200810189266A CN101764680A CN 101764680 A CN101764680 A CN 101764680A CN 200810189266 A CN200810189266 A CN 200810189266A CN 200810189266 A CN200810189266 A CN 200810189266A CN 101764680 A CN101764680 A CN 101764680A
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Abstract
The invention provides a method for increasing the transmission efficiency of data services. The method comprises the following step: when a lost data block is detected by a receiving party, an answer message containing the receiving bitmap of the receiving window of the receiving party is sent to a sending party by the receiving party. Consequently, when the loss of data blocks is continuously caused at the receiving party, the method of the invention is capable of making the adjustment in a timely manner and sending an answer to the sending partying which sends the Nacked (negative acknowledgement) data blocks using the V(A)-based index and undergoing the earliest transmission in the data array V(B) after receiving the answer, thereby effectively preventing a window from being delayed.
Description
Technical field
The present invention relates to field of mobile communication, relate in particular to a kind of method that improves transmission efficiency of data services in mobile communication system.
Background technology
In mobile communication system, under the affirmation mode, the both sides of data service are the mechanism that adopts sliding window, receiving-transmitting sides respectively has a transmitting-receiving window, after the recipient receives the data of some, can send acknowledge message to transmit leg, inform the situation that receives bitmap in the current receive window of transmit leg.Transmit leg is according to this acknowledge message, confirms whether the recipient correctly receives the data block that sends previously, and retransmits the data block that do not receive and sliding window forward by this.The window of transmitting-receiving two-end according to above rule constantly to front slide.When the data block of reception unconfirmed the earliest in recipient's window and the next distance of waiting to receive between the data block reach window size, can't be to front slide, thus cause receive window to be stagnated; In the transmit leg window the earliest the distance between unacknowledged data piece and the next data block that will send reach window size and fail to front slide, send window will be stagnated.Sliding window mechanism is used in present communication system in a large number, can improve the efficient of transmission effectively.But problem is, it is longer to send and receive the time interval that both sides confirm, stagnates then can greatly influence efficient or because of not recovering to cause service fail in case window occurs.Mobile communication system causes the existence of its time delay and data to be lost easily owing to the network configuration and the complicated wireless environment of its mixing, and the chance that window is stagnated is also bigger, and the chance of the service exception release that therefore causes is also bigger.When wireless environment does not reach requiring of high-speed transfer, thereby uply lose the piece increase and may cause sliding window to be stagnated making up TBF (Temporary Block Flow, Temporary Block Flow) unusual release, also there is this problem in same descending TBF, can influence the transmission rate and the stability of data service so to a great extent.
In GSM (Global System for Mobile Communications, global system for mobile communications) system, safeguard that the both sides of transmitting-receiving window are respectively the packet control unit (PCU, Packet Control Unit) of MS (portable terminal) and network side.Wherein, when uploading data service, mobile terminal side is mainly safeguarded send window, and network side is mainly safeguarded receive window; When data download was professional, mobile terminal side was mainly safeguarded receive window, and network side is mainly safeguarded send window.Both sides adopt the slip of the mechanism maintenance window of replying, if side's window reaches maximum and moves, then are in the unusual flow process of window stagnation.Stagnate if window is long-term, frequent, can greatly influence transmission performance.
Along with the development and the professional variation of mobile communication technology, the application of data service is more and more, requires more and more higher.In upstream data service owing to respect to the network equipment more restriction (power, modulation and emission) is arranged as the portable terminal of transmit leg, and the up multislot capability of current most of portable terminal all more descending a little less than.Such as, a multi-slot basic capacity is the portable terminal of 8 (CLASS8), when carrying out the up-downgoing transmission simultaneously, generally adopts 4 time slots to receive, and adopts 1 time slot to send.Uplink service often can not have too big window, and what the chance that both sides reply was also more descending lacks.
Wireless network itself is exactly the changeable environment of a complexity, under this environment, even employing dynamically adapting algorithm also can not reflect wireless environment at that time fully.So loss of data is inevitably in the wireless environment, and this influence that transfer of data is caused usually influences the slip of window, causes window to stagnate and more serious consequence.When portable terminal received down in relatively poor wireless environment and sends data, the phenomenon of dropout of data block often appearred.Like this, the data block in the send window can not get confirming that window can't slide.If the dropout of data block of the data block of band key point and band acknowledgement indicator, both sides just can't understand the other side's the window's position and Data Receiving situation, even receiving-transmitting sides window secular stagnation can occur and can not recover.Even and if portable terminal is in preferably under the wireless environment, also can above-mentioned problem appear because of wireless disturbance.Current data are lost also do not have very good treating method, and the data block of band key point and the dropout of data block of band acknowledgement indicator are lacked judging means and consideration especially.
The Chinese patent of patent No. CN200510089858 provides a kind of method that down transmission efficiency was stagnated and improved to down wireless link control sliding window that reduces, but its window during not to uplink service is provided by the scheme that provides.Simultaneously, this patent lays particular emphasis on and guarantees that grouping downlink replys promptly and accurately.
And in agreement, only provide the method for the most basic maintenance window, do not provide the specific algorithm how special circumstances solve and prevent window to stagnate.For example, in the prior art, if the data block that portable terminal is sent out to network side is in lost condition always, network side can not sent out ascending response message to portable terminal, its bitmap can not upgrade when portable terminal can not receive ascending response message, V (A) can not move, thereby cause window to stagnate, V (A) is a unacknowledged data piece array at first in the window of agreement regulation, V (B) is a confirmation state array, when unconfirmed data block was arranged among the V (B), V (A) will rest on and send the earliest and state is the data block place that does not confirm (Nacked), will not cause window to stagnate if V (A) moves always.When portable terminal sends data block, also there is similar problem at network side.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of method that improves mobile communication system transmitted in packets efficient, and the prevention window is stagnated, and effectively improves the data transmission utilization ratio of grouped channels.
In order to solve the problems of the technologies described above, the invention provides a kind of method that improves data traffic transmission efficient, comprise:
When the recipient detects the obliterated data piece, send response message, carry the reception bitmap of recipient's receive window in the message to transmit leg.
Further, said method also can have following characteristics, and after described transmit leg was received described response message, according to described reception bitmap, the state of resending was that unconfirmed data block is given the recipient.
Further, said method also can have following characteristics, when described recipient detects the data block that continues to lose and is no less than a given threshold value N, just sends described response message to transmit leg.
Further, said method also can have following characteristics, and described transmit leg is a portable terminal, and described recipient is a network side, and described response message is an ascending response message.
Further, said method also can have following characteristics, described recipient detects the obliterated data piece and is meant, when network side is received the data block that portable terminal sends, detects this data block and is not on network side is distributed to the uplink data block of this portable terminal and send; Or network side is being distributed to the data block of not receiving on the uplink data block of this portable terminal that this portable terminal sends.
Further, said method also can have following characteristics, and described transmit leg is a network side, and described recipient is a portable terminal, and described response message is the grouping downlink response message.
Further, said method also can have following characteristics, described recipient detects the obliterated data piece and is meant, when portable terminal is received the data block that network side sends, detects this data block and is not on network side is distributed to the downlink data block of portable terminal and send; Or portable terminal is being distributed to the data block of not receiving on the downlink data block of this portable terminal that network side sends.
Method of the present invention, the recipient is when lasting obliterated data piece, can do timely and adjust, reply to the transmit leg transmission, transmit leg is receiving that will send after replying in V (B) array with V (A) is that the transmission the earliest and the state of index is " confirming " data block (Nacked), thereby prevents that effectively window stagnates.
Description of drawings
Fig. 1 is the method flow diagram that the present invention improves data transmission efficiency.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
In the prior art, if the data block that portable terminal is sent out to network side is in lost condition always, network side can not sent out ascending response message to portable terminal, thereby causes window to stagnate.Among the present invention, when network side is not received the uplink data block that portable terminal sends, be that network side detects when dropout of data block takes place, (the value backstage of N can be joined when the data block number of losing is no less than threshold value N given in advance, for example be 5) time, network side is sent out ascending response message to portable terminal, portable terminal upgrades V (A), V (B) according to the bitmap that carries in this message after receiving ascending response message, so that portable terminal in time resends the data block that sends and do not receive acknowledgement message the earliest, thereby can prevent the window stagnation of portable terminal place.V (A) is a unacknowledged data piece array at first in the window of agreement regulation, and V (B) is a confirmation state array.Equally, when portable terminal is receiving terminal, portable terminal detects when dropout of data block takes place, when the data block number of losing is no less than threshold value N given in advance when (the value backstage of N can be joined), portable terminal is sent out the grouping downlink response message to network side, network side receives that the reception bitmap according to the portable terminal receive window that carries in this message upgrades this site map after the grouping downlink response message, so that network side in time resends the data block that sends and do not receive acknowledgement message the earliest, thereby can prevent the stagnation of network side window.
Referring to Fig. 1, it is as follows that the present invention improves data traffic transmission efficient flow process:
When step 103, uplink state machine are received lost block message at transmitting state, judge whether to have lost and be no less than N uplink data block, such as N=5, and VR is not equal to oldVR, if condition set up then enter 104, otherwise, return step 101; Wherein,
VR is first data block of wishing reception in the receive window of agreement regulation, and oldVR is the VR of (last window) before receive window moves, and VR is not equal to oldVR and is used for judging whether to be to continue to have lost N uplink data block;
After step 105, portable terminal were received this ascending response message, according to the reception bitmap in this message, resending in V (B) array with V (A) was that the transmission the earliest and the state of index given network side for " confirming " data block (Nacked).
For downlink transfer, portable terminal is as the recipient, the bitmap that receives is carried by the grouping downlink response message, be that portable terminal sends the grouping downlink response message, concrete steps and above-mentioned network side are that recipient's flow process is similar, repeat no more herein, wherein, portable terminal detects the obliterated data piece and is meant, when portable terminal is received the data block that network side sends, detects this data block and is not on network side is distributed to the downlink data block of portable terminal and send; Or portable terminal is being distributed to the data block of not receiving on the downlink data block of this portable terminal that network side sends.
Network side is safeguarded the packet control unit of receive window.
Method of the present invention, the recipient is when lasting obliterated data piece, can do timely and adjust, send response message to transmit leg, it is that the transmission the earliest and the state of index given the recipient for " confirming " data block (Nacked) that transmit leg will send after receiving this response message in V (B) array with V (A), thereby prevents that effectively window stagnates.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (7)
1. a method that improves data traffic transmission efficient is characterized in that, comprises:
When the recipient detects the obliterated data piece, send response message, carry the reception bitmap of recipient's receive window in the message to transmit leg.
2. the method for claim 1 is characterized in that, after described transmit leg was received described response message, according to described reception bitmap, the state of resending was that unconfirmed data block is given the recipient.
3. method as claimed in claim 1 or 2 is characterized in that, when described recipient detects the data block that continues to lose and is no less than a given threshold value N, just sends described response message to transmit leg.
4. method as claimed in claim 1 or 2 is characterized in that, described transmit leg is a portable terminal, and described recipient is a network side, and described response message is an ascending response message.
5. method as claimed in claim 4, it is characterized in that, described recipient detects the obliterated data piece and is meant, when network side is received the data block that portable terminal sends, detects this data block and is not on network side is distributed to the uplink data block of this portable terminal and send; Or network side is being distributed to the data block of not receiving on the uplink data block of this portable terminal that this portable terminal sends.
6. method as claimed in claim 1 or 2 is characterized in that, described transmit leg is a network side, and described recipient is a portable terminal, and described response message is the grouping downlink response message.
7. method as claimed in claim 6, it is characterized in that, described recipient detects the obliterated data piece and is meant, when portable terminal is received the data block that network side sends, detects this data block and is not on network side is distributed to the downlink data block of portable terminal and send; Or portable terminal is being distributed to the data block of not receiving on the downlink data block of this portable terminal that network side sends.
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| CN200810189266A CN101764680A (en) | 2008-12-26 | 2008-12-26 | Method for increasing transmission efficiency of data services in mobile communication system |
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| CN200810189266A CN101764680A (en) | 2008-12-26 | 2008-12-26 | Method for increasing transmission efficiency of data services in mobile communication system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115395988A (en) * | 2021-05-25 | 2022-11-25 | 瑞昱半导体股份有限公司 | Bluetooth communication device and data transmission method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115395988A (en) * | 2021-05-25 | 2022-11-25 | 瑞昱半导体股份有限公司 | Bluetooth communication device and data transmission method |
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Application publication date: 20100630 |