CN102076017A - Method and device for transmitting retransmission message in TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) mobile terminal - Google Patents
Method and device for transmitting retransmission message in TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) mobile terminal Download PDFInfo
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- CN102076017A CN102076017A CN2009102464264A CN200910246426A CN102076017A CN 102076017 A CN102076017 A CN 102076017A CN 2009102464264 A CN2009102464264 A CN 2009102464264A CN 200910246426 A CN200910246426 A CN 200910246426A CN 102076017 A CN102076017 A CN 102076017A
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Abstract
The invention discloses a method and device for transmitting a retransmission message in a TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) mobile terminal. The method mainly comprises the following steps: a confirming step used for confirming the mixing type of a retransmission message configured by an operator, a judging step used for judging whether the retransmission message meets the retransmission need, and a transmitting step for retransmitting the message meeting the retransmission need. The method and device provided by the embodiment of the invention scarcely influence the current standard and can improve the HSPA (High-Speed Packet Access)/HSPA+ (HSPA evolution) and the real-time performance.
Description
Technical field
The present invention relates to a kind of method and apparatus that retransmits message that in the TD-SCDMA portable terminal, sends, particularly relate to the method and apparatus that a kind of transmission relevant with the mixed automatic retransmission request type retransmits message.
Background technology
Insert (HSPA) or the downward evolution version of HSPA (HSPA+) for high-speed packet, configuration mixed automatic retransmission request (HARQ).If wireless base station (RBS) do not carry out correct decoding to sending, the wireless base station is with notifying user equipment (UE) (such as portable terminal), and this subscriber equipment will be retransmitted the message data of front again.At present, standard is supported following two types repeating transmission:
-CC (Chase merging): the message of repeating transmission is identical with original message;
-IR (steadily increase redundancy): the message of repeating transmission uses the punching pattern different from the coding of original message.
No matter original transmission or repeating transmission, TD SDMA (TD-SCDMA) wireless base station should be to a user equipment allocation power and a sign indicating number resource, for scheduling resource at each Transmission Time Interval (TTI).Only permit (code/power) in the wireless base station enough the time, the message that subscriber equipment can retransmits erroneous, perhaps subscriber equipment sends new message.If it were not for TD-SCDMA, when occurring retransmitting, the wireless base station is difficult to distribute and former identical resource.
TD-SCDMA divides scheduling and non-scheduled HARQ process number, so, for the radio bearer that carries on the scheduling of resource, only support maximum 4 HARQ processes.
Fig. 1 shows the sequential process analysis that current TD SDMA High Speed Uplink Packet is inserted the mixed automatic retransmission request process.As seen from the figure, in UE prepare to retransmit continuous two Transmission Time Intervals (TTI) that will not confirm (NACK), the wireless base station gives low power or code channel mandate, it will trigger a HARQ packet loss, thereby trigger the repeating transmission of Radio Link control (RLC) layer, this will greatly affect the HSPA/HSPA+ flow.For example, under the help of OLPC, original bLock error rate (BLER) target is 10%, and actual BLER burst can reach 15%-20%, and this will cause the Radio Link control (RLC) of extra 3-5% to be retransmitted.
Therefore, present TD-SCDMA multiple access inserts channel standard will be easy to make unwise ground of subscriber equipment dropping packets, and this will limit flow and the round trip delay time of HSPA/HSPA+ service.
Summary of the invention
The objective of the invention is in order to overcome the defective of prior art existence, a kind of method and apparatus that retransmits message that sends is provided.In order to realize this purpose, the technical solution used in the present invention is as follows.
According to the first aspect of the embodiment of the invention, a kind of method that retransmits message that sends in the TD-SCDMA portable terminal is provided, comprising: determining step, for the mixed type of the re-transmission message of determining operator's configuration; Determining step is used for judging whether retransmit message satisfies the re-transmission requirement; And forwarding step, resend for satisfying the message that retransmits requirement.
According to the second aspect of the embodiment of the invention, a kind of device that retransmits message that sends in the TD-SCDMA portable terminal is provided, comprising: determination module, for the mixed type of the re-transmission message of determining operator's configuration; Judge module is used for judging whether retransmit message satisfies the re-transmission requirement; And sending module, resend for satisfying the message that retransmits requirement.
According to the third aspect of the embodiment of the invention, a kind of TD-SCDMA portable terminal is provided, comprise the device that retransmits message according to the transmission of embodiment of the invention second aspect.
According to the method and apparatus of the embodiment of the invention, to the almost not impact of current standard, and can improve HSPA/HSPA+ and real-time performance.
Below in conjunction with accompanying drawing and by specific embodiment the present invention is further specified.
Description of drawings
Fig. 1 shows the sequential process analysis that current TD SDMA High Speed Uplink Packet is inserted the mixed automatic retransmission request process;
Fig. 2 is the flow chart that is used for sending at the TD-SCDMA portable terminal re-transmission method of message according to one embodiment of the invention;
Fig. 3 is the schematic block diagram that is used for sending at the TD-SCDMA portable terminal device that retransmits message according to one embodiment of the invention.
Embodiment
According to the related re-transmission resource system of selection of the HARQ type of the embodiment of the invention and device by the change standard, so that re-transmission only checks required physical resource availability.
For CC, to the HARQ process, send for the first time with the repeating transmission message and must use identical code resource, identical but power resource does not need.
For IR, to the HARQ process, send for the first time and retransmit message and can use different sign indicating number and power resource, still, retransmit and to guarantee that the sign indicating number resource is greater than the needs of minimum code speed (the minimum code speed that actual code rate must limit greater than wireless network).
So detailed HARQ process can be carried out change as shown in Figure 2.Wherein change and mainly be: at first, determine the mixed type (being determining step) of the re-transmission message of operator's configuration, determine that just retransmitting message is CC or IR; Secondly, judge respectively for dissimilar whether the re-transmission message satisfies re-transmission and require (being determining step); At last, resend (being forwarding step) for satisfying the message that retransmits requirement.In addition, before determining to retransmit the mixed type of message, can comprise also whether having retransmitting message etc. (promptly checking step) to be sent that mobile terminal check mixed automatic retransmission request process does not retransmit the new message (constitution step) of structure when to be sent such as message by mobile terminal check mixed automatic retransmission request process.Below in conjunction with flow chart 2, be specifically described retransmitting method of message according in the TD-SCDMA portable terminal, sending of present embodiment.
UE checks the HARQ process, has determined whether to retransmit (frames 200) to be sent such as messages;
To retransmit message etc. to be sent if having, and determines that then this retransmits message and uses Chase to merge CC (Chase Combining) or steadily increase redundancy retransmits IR (Incremental Redundancy) (frame 202);
If CC checks the code resource of distributing so, if the code resource that this time scheduling is used and the code resource identical (frame 204) of last scheduled then satisfy retransmitting requirement;
If IR, detect so code resource that should time scheduling, for this packet to be retransmitted, calculate corresponding code rate, and detect this speed whether in maximum that operator disposes and minimum code speed range (frame 206).If in this scope, think that so code rate is legal, satisfy retransmitting requirement;
Retransmit the re-transmission message (frame 208) that requires for satisfying, then retransmit this message (frame 210); If do not satisfy, then again skip to frame 200.
In addition, if it is to be sent to determine not retransmit message etc. in frame 200, new message (frame 212) takes place then.
As an application example according to the present embodiment method, certain mobile phone finds have packet to be retransmitted, mobile phone at first to detect this message retransmission mode, is assumed to be CC, so, detects scheduling next time.If the code of scheduling is 16 SF16, also used 16 SF16 and launched this message last time, think so and satisfy retransmission condition, retransmit this message.
As the Another application example according to the present embodiment method, certain mobile phone finds have packet to be retransmitted, mobile phone at first to detect this message retransmission mode, is assumed to be IR, so, detects scheduling next time.If the code of scheduling supports that for maximum transport block size is 2816, this packet to be retransmitted size is 1971, calculates so code check and be 1971/2816=0.7 (176 is maximum data block sizes that the code channel of a SF16 can transmit).If operator's configuration legal encodings speed range is 0.3-0.9, think that so this code rate is legal, retransmit this message.
As shown in Figure 3, be the schematic block diagram that is used for sending the device that retransmits message at the TD-SCDMA portable terminal according to one embodiment of the invention, mainly comprise determination module 302, judge module 304 and sending module 306.In addition, also can comprise inspection module 300 and constructing module 308.
Wherein in checking module 300, check whether the mixed automatic retransmission request process has the message of re-transmission etc. to be sent.To retransmit message etc. to be sent if having, then determination module 302 determine operators' configuration this retransmit the mixed type of message, i.e. CC or IR.Judge module 304 judges for the mixed type of different re-transmission messages whether retransmit message satisfies the re-transmission requirement.Retransmit requirement if satisfy, 306 pairs of these messages of sending module resend.Otherwise if discontented lumping weight passes requirement, then the echo check module 300.In addition, not retransmit message etc. to be sent if checking module 300 is checked through the mixed automatic retransmission request process, then by the new message of constructing module 308 structures.
The device for send the re-transmission message at the TD-SCDMA portable terminal according to present embodiment can be implemented in by hardware, software, firmware or its combination in the portable terminal (such as including but not limited to mobile phone, PDA, portable computer etc.), to carry out the method that in the TD-SCDMA portable terminal, sends the re-transmission message according to the embodiment of the invention, this realizes easily to those skilled in the art, does not do detailed description at this.
More than describe the present invention by specific embodiment, but the present invention is not limited to these specific embodiments.Those skilled in the art should be understood that, can also make various modifications to the present invention, be equal to replacement, change or the like, for example with a step in the foregoing description or module is divided into two or more steps or module realizes, perhaps opposite, the function of two or more steps in the foregoing description or module is placed in a step or the module realizes.But these conversion all should be within protection scope of the present invention as long as do not deviate from spirit of the present invention.In addition, the symbol of more employed terms of present specification and claims and employing is not restriction, only is for convenience of description.
Claims (15)
1. one kind is used for sending the re-transmission method of message at the TD-SCDMA portable terminal, comprising:
Determining step is used for determining the mixed type of the re-transmission message of operator's configuration;
Determining step is used for judging whether retransmit message satisfies the re-transmission requirement; And
Forwarding step is used for resending satisfying the message that retransmits requirement.
2. the method for claim 1 also comprises:
Check step, be used for checking whether the mixed automatic retransmission request process has the message of re-transmission etc. to be sent.
3. method as claimed in claim 2 also comprises:
Constitution step is used for not retransmitting the new message of structure when to be sent such as message in the mixed automatic retransmission request process.
4. method as claimed in claim 2 wherein in determining step, retransmits the discontented lumping weight biography of message requirement, then echo check step if judge.
5. as each described method in the claim 1 to 4, the mixed type that wherein retransmits message comprises that Chase merges and steadily increase redundancy.
6. method as claimed in claim 5 wherein merges the re-transmission message for Chase, and the re-transmission requirement is identical with the sign indicating number resource of last scheduled use for the sign indicating number resource of this time scheduling use.
7. method as claimed in claim 5 wherein retransmits message for steadily increase redundancy, and the corresponding code rate of code resource that re-transmission requires to use for this time scheduling is in maximum and minimum code speed range that operator disposes.
8. one kind is used for sending the device that retransmits message at the TD-SCDMA portable terminal, comprising:
Determination module is used for determining the mixed type of the re-transmission message of operator's configuration;
Judge module is used for judging whether retransmit message satisfies the re-transmission requirement; And
Sending module is used for resending satisfying the message that retransmits requirement.
9. device as claimed in claim 8 also comprises:
Checking module be used for to check whether the mixed automatic retransmission request process has the message of re-transmission etc. to be sent.
10. device as claimed in claim 9 also comprises:
Constructing module is used for not retransmitting the new message of structure when to be sent such as message in the mixed automatic retransmission request process.
11. device as claimed in claim 9 is if wherein judge module concludes that retransmitting the discontented lumping weight of message passes requirement, then echo check module.
12. as each described device in the claim 8 to 11, the mixed type that wherein retransmits message comprises that Chase merges and steadily increase redundancy.
13. device as claimed in claim 12 wherein merges the re-transmission message for Chase, the re-transmission requirement is identical with the sign indicating number resource of last scheduled use for the sign indicating number resource of this time scheduling use.
14. device as claimed in claim 12 wherein retransmits message for steadily increase redundancy, the corresponding code rate of code resource that re-transmission requires to use for this time scheduling is in maximum and minimum code speed range that operator disposes.
15. a portable terminal comprises that each described transmission of claim 8 to 14 retransmits the device of message.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102464264A CN102076017A (en) | 2009-11-20 | 2009-11-20 | Method and device for transmitting retransmission message in TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) mobile terminal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102464264A CN102076017A (en) | 2009-11-20 | 2009-11-20 | Method and device for transmitting retransmission message in TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) mobile terminal |
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| CN102076017A true CN102076017A (en) | 2011-05-25 |
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| CN2009102464264A Pending CN102076017A (en) | 2009-11-20 | 2009-11-20 | Method and device for transmitting retransmission message in TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) mobile terminal |
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Application publication date: 20110525 |