CN1867171A - Method for improving dedicated channel wireless resource utilization ratio - Google Patents

Abstract

The invention relates to a method for improving the wireless resource utilization of special channel, belonging to the network communication technique. Wherein, it is completed by MAC layer; MAC checks the real emitted data amount and the useful TF, at each TTI; if the transmission block number of useful TF is equal to the real emitted data block number, selecting said TF; or else, selecting two TF whose real emitted data block numbers DataNum approach the transmission block number of all useful TF most, to be recorded as TFA and TFB, while TFA> DataNum>TFB; when there is no TFA, TFB is the selected result; when there is TFA, judging if (DataNum-TFB)/(TFA- TFB)<LIMIT, and TFB is the selected result; or else, the selection result of TF is TFA; the transmission block number filled by MAC is as PAD=TFA-DataNum. Said invention can make the service data use larger TF, to reach higher wireless resource utilization.

Description

A kind of method that improves the dedicated channel wireless resource utilance

Technical field

The present invention relates to network communications technology field, relate in particular to a kind of method that improves the dedicated channel wireless resource utilance.

Background technology

Universal mobile telecommunications system (UMTS, Universal Mobile TelecommunicationsSystem) be to adopt Wideband Code Division Multiple Access (WCDMA) to insert (WCDMA, Wideband Code DivisionMultiple Access) 3-G (Generation Three mobile communication system) of air interface technologies is also referred to as the WCDMA communication system usually.The WCDMA communication system comprises Radio Access Network (RAN, RadioAccess Network) and core network (CN, Core Network).Wherein, RAN realizes all and wireless function associated being also referred to as universal terrestrial access network (UTRAN, Universal Terrestrial Radio Access Network) usually.

The wave point of UTRAN is divided into physical layer, data link layer and network layer, wherein Radio Link is controlled (RLC, Radio Link Control) sublayer and media interviews control (MAC, MediumAccess Control) sublayer is the important sublayer in the data link layer.

Described RLC sublayer comprises that (its major function is to finish data-transformation facility for TM, TransparentMode) three kinds of mode of operations for affirmation mode (AM, Acknowledge Mode), Unacknowledged Mode (UM, Unacknowledge Mode) and transparent mode.Wherein, under the AM pattern, when service data unit (SDU from the upper strata is received in the RLC sublayer, Server Data Unit) after, protocol Data Unit (PDU according to the indication of the MAC of its lower floor layer, Protocol Data Unit) SDU that receives of big young pathbreaker is divided into the PDU of fixed size, sends to the MAC layer then.

At the MAC layer then according to TFS Transport Format Set (TFS by chain of command configuration, Transport FormatSet) and transport format combination set (TFCS, Transport Format Combination Set), and according to from what of the data volume of RLC, select a suitable transformat (TF, TransportFormat) data are sent to physical layer, chain of command is configured to TFCS and TFS base station (NODEB) and the subscriber equipment (UE, User Equipment) among the 3G simultaneously.Have only satisfy the TF that TFCS and TFS require simultaneously can be by NODEB and correct transmission and the reception of UE.

Because UE limited in one's ability, the TFCI limited amount among the TFCS that can support, when using a plurality of Traffic Channel at the same time, the TF quantity among the operable TFS of each channel also just is restricted.As: the TFCI number that UE supports is 12, uses 3 channels simultaneously, if two kinds of transformats are arranged among the TFS of every channel, so total number of combinations is the 2*2*2=8 kind, less than 12, is no problem.If the TFS of every channel has three kinds of transformats, so total number of combinations is the 3*3*3=18 kind, and UE does not just have the such configuration of ability support.

Therefore, corresponding to certain Traffic Channel, the number of combinations of TFS will be subjected to certain restriction.Such as, be the data service of 64K for speed, supposing to have 5 TF among the available TFS, and the transmission block size of TF is consistent, is designated as L; Transmission Time Interval (TTI, Transmission Time Interval) unanimity is designated as T; The difference of 5 TF just only is that the number of transmission block is inconsistent so, is designated as TF0～TF4; And TF0＜TF1＜...＜TF4, like this when professional when issuing for the full rate of 64K, MAC will select maximum TF for use, i.e. TF4, when not having data distributing, MAC will select the TF of minimum, i.e. TF0 for use.

According to the processing of present agreement, TFS is classification, discontinuous, and available TF quantity is limited, but actual service rate might be a continually varying.Such as in last example, 5 kinds of different TF, 5 kinds of different speed in 0～64K interval that reality is corresponding, such as (0K, 8K, 16K, 32K, 64K).But the practical business rate variation is continuous, is far above these 5 kinds.When service rate is 60K, just can only select TF for use corresponding to 32K, actual speed just has only 32K, has wasted the sign indicating number resource.

Therefore, need a kind of method that improves the dedicated channel wireless resource utilance,, reach higher wireless resource utility efficiency in order to avoid this waste of radio resources.

Summary of the invention

In view of above-mentioned existing in prior technology problem, the purpose of this invention is to provide a kind of method that improves the dedicated channel wireless resource utilance, when different TF are big at interval, by the MAC byte of padding, make business datum can select big TF for use, reach higher wireless resource utility efficiency.

The objective of the invention is to be achieved through the following technical solutions:

A kind of method that improves the dedicated channel wireless resource utilance comprises:

A, MAC layer are the transformat TF that data to be sent are selected and actual speed rate is mated most in the transmission format set TFS of configuration;

B, MAC layer use the transformat TF that mates most to transmit.

Described steps A comprises:

A1, MAC layer are checked data block number actual to be sent and available TF at the transmission interval T TI of transmission block;

A2, when described reality data block number to be sent is not equal to the number of transport blocks of available TF correspondence, determine that according to reality data block number to be sent the TF of coupling is as the professional actual TF that uses;

A3, when described reality data block number to be sent equals the number of transport blocks of available TF correspondence, select this TF as selection result.

Described steps A 2 specifically comprises:

A21, find the most approaching reality of number of transport blocks data block to be sent among all available TF to count two TF of DataNum according to reality data block number to be sent, be designated as TFA, TFB, TFA＞DataNum＞TFB wherein, if (DataNum-TFB)/(TFA-TFB)＜LIMIT, TFB is selection result, otherwise, select TFA as selection result, wherein LIMIT is a configurable value, span 0～1.

When TFA did not exist, TFB was selection result in the described steps A 21.

Described steps A 21 specifically comprises:

If A211 selects TFA as selection result, then need to generate byte of padding, and business waiting for transmission is filled processing by the media access control MAC layer.

Described steps A 211 comprises:

The number of transport blocks PAD=TFA-DataNum that A2111, calculating MAC need fill.

Described steps A 2111 specifically comprises:

Judge the pattern of the Radio Link control RLC on MAC upper strata, if RLC uses affirmation mode AM, then utilize the RLC control protocol data cell PDU of the element NO MORE SUFI structure among a kind of transport format combination set TFCS, the PDU number of filling is PAD.

As seen from the above technical solution provided by the invention, the present invention generates byte of padding by MAC when professional actual speed rate is lower than the speed of assignment, make business datum can select big TF for use, reaches higher wireless resource utility efficiency.

Description of drawings

Fig. 1 is the operational flowchart of the method for the invention.

Embodiment

For ease of understanding the present invention, below that common technology terminological interpretation of the present invention is as follows:

Transformat (TF, Transport Format) is used to define the form that MAC course physical layer sends data, is divided into semi-static part and dynamic part.Semi-static part only changes when channel configuration and release, and dynamic part comprises the TTI of length, transmission block total length and the transmission block of single transmission block.Under the situation that the length of single transmission block is fixed, as long as each TTI has determined the number of transmission block, TF just can determine.

TFS Transport Format Set (TFS, Transport Format Set) is the set of operable TF on a certain the channel.The semi-static part of TF among the TFS is all identical, and dynamic part can be different.

Transport format combination set (TFCS, Transport Format Combination Set) then is meant the combination that to use TF among the TFS of all channels on the bar code combination of transmitted channel, each element among the TFCS is called TFCI, represent a kind of combined situation, wherein NO MORE is a kind of of TFCI.

Media interviews control (MAC, Medium Access Control) sublayer is used at each TTI, under the constraint of TFCS and TFS, selects a suitable TF according to the actual volume of channel.

Core concept of the present invention provides a kind of method that improves the dedicated channel wireless resource utilance, when different TF are big at interval, can select big TF for use for business datum, reaches higher wireless resource utility efficiency.

The filling mechanism that a kind of method that improves the dedicated channel wireless resource utilance of the present invention proposes is finished by the MAC layer.When the speed of data service is 64K.The RLC sublayer is the AM pattern; TTI length is 40ms; Transport block length is 320bits; For reaching the transmission rate of 64K, at first calculate the transmission block number Num that each TTI need send at most:

Num=speed * TTI/ transport block length=8,

The maximum that can be determined 5 TF among the TFS by this number will equal 8 at least, have 5 TF among the TFS, corresponding number of transport blocks is respectively: 0,1,2,4,8, RLC is actual when 7 blocks of data are arranged, according to present agreement, can only use number of transport blocks is 4 transformat, with reference to Figure 1 shows that the present invention finishes the concrete steps of the mechanism of filling:

Step 101:MAC layer is checked data block number actual to be sent and available TF at each TTI, determines that according to check result professional actual speed rate is between the operable TF;

Step 102: according to the rule of setting is that service selection to be sent is used a kind of among two kinds of TF; Concrete processing procedure is as follows:

Judge at first whether the number of transport blocks among the available TF equals data block number actual to be sent;

Step 103:, then select this TF as selection result if the number of transport blocks among the above-mentioned available TF equals data block number actual to be sent;

Step 104: if the number of transport blocks among the above-mentioned available TF is not equal to data block number actual to be sent, then the MAC layer finds the most approaching reality of number of transport blocks data block to be sent among all available TF to count two TF of DataNum, be designated as TFA, TFB, wherein TFA＞DataNum＞TFB;

Because the number of transport blocks of minimum TF correspondence is 0, so TFB certainly exists;

Step 105: when TFA did not exist, TFB was selection result, directly carried out transfer of data with this TFB form, need not to fill to handle;

Step 106: when TFA exists, judge (DataNum-TFB)/(TFA-TFB)＜LIMIT, wherein LIMIT is a configurable value, span 0～1, and it is 0.5 that present embodiment is got the LIMIT value;

If above-mentioned judged result is for being, then TFB is selection result, directly carries out transfer of data with this TFB form, need not to fill to handle;

Step 107: if above-mentioned being judged as not, then the TF selection result is TFA, generates byte of padding by the MAC layer and fills processing;

Calculate PAD=TFA-DataNum, be the number of transport blocks that MAC need fill.Judge the pattern of the RLC on MAC upper strata, if RLC uses the AM pattern, then utilize the control PDU of NO MORE SUFI structure RLC, the PDU number of filling is PAD, selects to finish.

In sum, the present invention generates byte of padding by the MAC layer, makes business datum can select big TF for use, reaches higher wireless resource utility efficiency.

The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.

Claims (7)

1, a kind of method that improves the dedicated channel wireless resource utilance is characterized in that, comprising:

A, MAC layer are the transformat TF that data to be sent are selected and actual speed rate is mated most in the transmission format set TFS of configuration;

B, MAC layer use the transformat TF that mates most to transmit.

2, the method for raising dedicated channel wireless resource utilance as claimed in claim 1 is characterized in that, described steps A comprises:

A1, MAC layer are checked data block number actual to be sent and available TF at the transmission interval T TI of transmission block;

A2, when described reality data block number to be sent is not equal to the number of transport blocks of available TF correspondence, determine that according to reality data block number to be sent the TF of coupling is as the professional actual TF that uses;

A3, when described reality data block number to be sent equals the number of transport blocks of available TF correspondence, select this TF as selection result.

3, the method for raising dedicated channel wireless resource utilance as claimed in claim 2 is characterized in that, described steps A 2 specifically comprises:

A21, find the most approaching reality of number of transport blocks data block to be sent among all available TF to count two TF of DataNum according to reality data block number to be sent, be designated as TFA, TFB, TFA＞DataNum＞TFB wherein, if (DataNum-TFB)/(TFA-TFB)＜LIMIT, TFB is selection result, otherwise, select TFA as selection result, wherein LIMIT is a configurable value, span 0～1.

4, the method for raising dedicated channel wireless resource utilance as claimed in claim 3 is characterized in that, when TFA did not exist, TFB was selection result in the described steps A 21.

5, the method for raising dedicated channel wireless resource utilance as claimed in claim 3 is characterized in that, described steps A 21 specifically comprises:

If A211 selects TFA as selection result, then need to generate byte of padding, and business waiting for transmission is filled processing by the media access control MAC layer.

6, the method for raising dedicated channel wireless resource utilance as claimed in claim 5 is characterized in that, described steps A 211 comprises:

The number of transport blocks PAD=TFA-DataNum that A2111, calculating MAC need fill.

7, the method for raising dedicated channel wireless resource utilance as claimed in claim 6 is characterized in that, described steps A 2111 specifically comprises:

Judge the pattern of the Radio Link control RLC on MAC upper strata, if RLC uses affirmation mode AM, then utilize the RLC control protocol data cell PDU of the element NO MORE SUFI structure among a kind of transport format combination set TFCS, the PDU number of filling is PAD.

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