CN100372259C - Method for selecting transmission format combination - Google Patents
Method for selecting transmission format combination Download PDFInfo
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- CN100372259C CN100372259C CNB2004100333379A CN200410033337A CN100372259C CN 100372259 C CN100372259 C CN 100372259C CN B2004100333379 A CNB2004100333379 A CN B2004100333379A CN 200410033337 A CN200410033337 A CN 200410033337A CN 100372259 C CN100372259 C CN 100372259C
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Abstract
The present invention relates to a method for selecting appropriate combination of transmission formats in a wireless transmission unit suitable for a wireless communication system. In the method of the present invention, all combination of transmission formats is firstly sequenced, and then the parameter of transmitting relative power is compared with the parameter of referential relative power to obtain an index; finally, the appropriate combination of transmission formats is selected according to the obtained index.
Description
Technical field
The present invention relates to a kind of method of in a wireless transmission unit, selecting suitable transformat combination.
Background technology
Wireless communication system now has been widely used for transmission as information such as sound and/or literal, and these communication systems can be divided into the technology of code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA) and other multiple access on data processing.Wherein used the most widely with code division multiple access again, and need be met general industrywide standard usually, as IS-95, CDMA2000 and W-CDMA etc.
Physical layer in W-CDMA (Physical layer) can be used for a plurality of transmission channels (transportchannel) mutual data transmission, each transmission channel can transmit one or more transformat (transport format), each transformat has many parameters relevant with data processing, for example: the delivery time at interval (transmission time interval, TTI), can transmit the size of data, the compiling method (coding scheme) etc. of acceptable transport block (transport bock) number, transport block in each TTI.Use different transformats can allow multi-form data transmit by identical media (being transmission channel).In a delivery time interval, one specific transformat combination (transport format combination, TFC) defined a transformat for each transmission channel, and this transformat combination is that (transport format combination is selected in TFCS) by one group of possible transmission format composite set.
With W-CDMA, desiring to reduce in limited frequency range the method in transmission time has following several: reduce and desire data quantity transmitted, increase encoding rate (coding rate) and increase data rate (data rate).Reduce to desire data quantity transmitted sometimes and the nonsystematic dealer can grasp, if but through-put power can increase, and then obtain preferable every potential energy and full noise jamming ratio (energy-per-bit-to-total-noise-plus-interference ratio), it is feasible then increasing code rate and data rate; Because the figure place of each figure place transformat combination TFC is not quite similar during transmission, for keeping the quality QoS (Quality of Service) of transmission service, each transformat combination TFC has different power, comply with the through-put power that indivedual through-put powers can provide with respect to wireless transmission unit, can be divided into power status of support (Supported State), power is crossed excessive state (Excess-power) state and blocked state (Blocked state), cross excessive state at status of support and power, TFC all has an opportunity selected and transmits, and at blocked state, TFC just has no chance to transmit.
In sum, under the qualification of the power that can provide a system, select the transformat combination TFC an of the best to transmit, the usefulness of system is had very big influence.Therefore, the power of judging which transformat combination be system can load just very important.
Summary of the invention
The present invention relates to a kind of method of selecting suitable transformat combination in a wireless transmission unit, this wireless transmission unit is applicable in the wireless communication system.Mentioned herein to wireless transmission unit can be a base station or a mobile communications device.
Wireless transmission unit comprises N possible transformat combination and with reference to the relative power parameter.In the above-mentioned N transformat combination (N is a positive integer), each transformat combination is with respect to a transmission relative power parameter, this transmission relative power parameter is to control channel (dedicated physical control channel with the application-specific entity of wireless communication system, DPCCH) (dedicated physical data channel, DPDCH) power is relevant for the dpdch of power and each transformat combination.Then relevant with reference to the relative power parameter with application-specific entity control channel power.
Method of the present invention comprises the following step: sort to N transformat combination according to the size of transmission relative power parameter (1.1); (1.2) relatively transmit the relative power parameter and with reference to the relative power parameter according to the order after the ordering, and obtain a pointer; And (1.3) are according to selecting a suitable transformat combination in the specified transformat combination of resulting pointer in the step (1.2).
Wherein, step (1.2) comprises the following step: (4.1) by selecting a transformat combination with as a comparison combination in N the transformat combination, and with the pointed comparison combination; (4.2) judge in Y time interval continuously, the transmission relative power parameter of comparison combination whether in X the time interval less than reference relative power parameter; (4.3) if the transmission relative power parameter of comparison combination in X the time interval less than reference relative power parameter, judge then whether pointer points to the transformat combination that has maximum transmitted relative power parameter after the ordering; (4.4) if pointer does not point to the transformat combination that has maximum transmitted relative power parameter after the ordering, then pointed transmission relative power parameter is the most approaching and greater than the transformat combination of comparison combination; (4.5) pointer transformat combination pointed in the step (4.4) is assigned as comparison combination; And (4.6) judge in Y time interval continuously, the transmission relative power parameter of comparison combination whether in X the time interval less than reference relative power parameter, if then get back to step (4.3).
Step (1.2) more comprises the following step: (7.1) if in step (4.2) the transmission relative power parameter of comparison combination not in X the time interval less than reference relative power parameter, judge then whether pointer points to the transformat combination that has minimum transfer relative power parameter after the ordering; (7.2) if pointer does not point to the transformat combination that has minimum transfer relative power parameter after the ordering, then pointed transmission relative power parameter is the most approaching and less than the transformat combination of comparison combination; (7.3) pointer transformat combination pointed in the step (7.2) is assigned as comparison combination; (7.4) the transmission relative power parameter of judging comparison combination whether in Z time interval continuously all less than reference relative power parameter; (7.5) if the transmission relative power parameter of in step (7.4), judging comparison combination not in continuous Z the time interval all less than this with reference to the relative power parameter, then get back to step (7.1); (7.6) if the transmission relative power parameter of in step (7.4), judging comparison combination in continuous Z the time interval all less than reference relative power parameter, then defining comparison combination is a critical transformat combination; And (7.7) are if having the transformat combination of minimum transfer relative power parameter judge the pointed ordering in step (7.1) after, then represent no any suitable transformat combination, the present invention sets and is labeled as " TRUE ", all can't be suitable for to represent all N transformat combination.
The accompanying drawing summary
Fig. 1 is the flow chart of method of the present invention;
Fig. 2 is the flow chart of first embodiment of the invention;
Fig. 3 is the part flow chart of method of the present invention when execution in step 102;
Fig. 4 is the part flow chart of method of the present invention when execution in step 102;
Fig. 5 is the part flow chart of method of the present invention when execution in step 102; And
Fig. 6 is the flow chart of second embodiment of the invention.
Embodiment
The present invention is applied in the W-CDMA system, and this system comprises a wireless transmission unit, in order to the transmission data.The W-CDMA system is when transmitting data, can transmit control signal in the lump, wherein control signal comprises delivering power control command (transmit power control command), guiding (pilot) and transformat combination indicating device signals such as (transport format combinationindicator).
The channel of being responsible for the transmission data is called dpdch (DPDCH), and the channel of being responsible for the transmission control signal then is called application-specific entity control channel (DPCCH).In each time interval, application-specific entity control channel power is generally fixed value, and dpdch power is then controlled a specific ratios of channel power for application-specific entity.Can converse in each time interval according to this ratio, required power when utilizing dpdch to transmit data, and this specification is defined as transmission relative power parameter with this ratio.In addition, this specification is defined is the maximum power that can provide for wireless transmission unit and the ratio of application-specific entity control channel power with reference to the relative power parameter.
The present invention promptly utilizes transmission relative power parameter and judges with reference to the relative power parameter power of which transformat combination of comparison is that system can load, and further determines can be used to transmit data for which transformat combination.
As shown in Figure 1, method provided by the present invention comprises the following step: when execution in step 100, wireless transmission unit sorts to N transformat combination according to the size of transmission relative power parameter.The mode of ordering can be descending or ascending, and the present invention does not limit the mode of ordering.
When execution in step 102, the order of wireless transmission unit after according to ordering relatively transmitted the relative power parameter and with reference to the relative power parameter, and then obtained a pointer, and this pointer is to point to a critical transformat combination.
When execution in step 104, wireless transmission unit is selected a suitable transformat combination according to pointer.
Because the present invention is relatively being transmitted the relative power parameter and during with reference to relative power parameter big or small, be to transmit relative power parameter and with reference to the size of relative power parameter with reference to (Y is a positive integer) in continuous Y time interval, so the first embodiment of the present invention as shown in Figure 2, more can comprise step 200: in continuous Y the time interval, store with reference to the numerical value of relative power parameter in each time interval.
Whether in addition, wireless transmission unit more can comprise a mark, neither suitable in order to represent an above-mentioned N transformat combination.This embodiment definition is if all transformat combination are neither to be suitable for, and then flag settings is " TRUE ", is not suitable for if be that all transformat combination are neither, and then flag settings is " FALSE ".Shown in step 202, this method more comprises default be labeled as " FALSE ", is not N neither being suitable for of transformat combination with expression.
It should be noted that; the order of the step 200 among Fig. 2, step 100 and step 202 can be transferred arbitrarily; except the order of the step 200-shown in the figure＞step 100-＞step 202, step 200-＞step 202-＞step 100, step 100-＞step 200-＞step 202 or other execution sequence also belong to the scope of desire protection of the present invention.
For more detailed description step 102, method of the present invention more can be subdivided into as Fig. 3, Fig. 4 and step shown in Figure 5.
As shown in Figure 3, when execution in step 300, wireless transmission unit is by selecting a transformat combination as comparison combination in the above-mentioned N transformat combination, and with the pointed comparison combination.The present invention does not limit wireless transmission unit is selected initial comparison combination in step 300 mode, in other words, the transformat combination that wireless transmission unit can be selected to transmit relative power parameter minimum is used as initial comparison combination, or select the transformat combination of transmission relative power parameter maximum to regard initial comparison combination, or any one transformat combination is as initial comparison combination.
When execution in step 302, wireless transmission unit was judged in continuous Y the time interval, the transmission relative power parameter of above-mentioned comparison combination whether in X the time interval less than reference relative power parameter, wherein X is a positive integer less than Y, and the present invention does not limit whether X the time interval is continuous.If less than reference relative power parameter, then expression has at least a transformat combination can supply to utilize to the transmission relative power parameter of comparison combination in X the time interval, this method is followed execution in step A.If not, then expression has not determined whether that as yet transformat combination can so follow execution in step B, continue to have judged whether that other transformat combination can be for utilizing for utilizing.
If the transmission relative power parameter of in step 302, judging comparison combination in X the time interval less than reference relative power parameter, then continue to carry out step 400 as shown in Figure 4, judge further whether pointer points to the transformat combination that has maximum transmitted relative power parameter after the ordering.
If pointer does not point to the transformat combination that has maximum transmitted relative power parameter after the ordering, then execution in step 402, and it is the most approaching and greater than the transformat combination of comparison combination that pointed is transmitted the relative power parameter.
When execution in step 404, will in step 402, pointer transformat combination pointed be assigned as comparison combination.
When execution in step 406, judge in Y time interval continuously, the transmission relative power parameter of comparison combination whether in X the time interval less than reference relative power parameter.If, then get back to step 400, continue to confirm whether to have the bigger person of transmission relative power parameter can supply to utilize.
If in step 406, judge in continuous Y the time interval, the transmission relative power parameter of comparison combination not in X the time interval less than reference relative power parameter, represent that then this comparison combination has been in all transformat combination that are suitable for, transmission relative power parameter the maximum.This moment execution in step 408 of the present invention, defining this comparison combination is critical transformat combination, promptly the transmission relative power parameter of transformat combination is all suitable transformat combination less than the transmission relative power parameter person of critical transformat combination.If in step 100, the mode of ordering is ascending, and then the transformat combination of ordering back before critical transformat combination all has the dpdch power that system can load, so applicable.The dpdch power of the transformat combination after critical transformat combination then surpasses system can load, so can't be suitable for.
If in step 400, judge the transformat combination that has maximum transmitted relative power parameter after pointed sorts, then representing not had the transformat combination with bigger transmission relative power parameter can be for comparing, the present invention is execution in step 408 just, and defining this comparison combination is critical transformat combination.
If in step 302, the transmission relative power parameter of judging comparison combination not in X the time interval less than reference relative power parameter, then carry out step 500 as shown in Figure 5, judge whether pointer points to the transformat combination that has minimum transfer relative power parameter after the ordering.If not, then continue to judge whether suitable transformat combination, this method is followed execution in step 502.
When execution in step 502, pointed transmission relative power parameter is the most approaching and less than a transformat combination of comparison combination.
When execution in step 504, the transformat combination that pointer in the step 502 is pointed is assigned as comparison combination.
When execution in step 506, the transmission relative power parameter of judging comparison combination whether in Z time interval continuously (Z is a positive integer less than Y) all less than reference relative power parameter.If then continue execution in step 508.
When execution in step 508, defining this comparison combination is critical transformat combination.
If the transmission relative power parameter of in step 506, judging comparison combination not in Z time interval continuously all less than reference relative power parameter, then get back to step 500, the transformat combination that continues to judge whether to have the defeated relative power parameter of brief biography more is available.
If judge the transformat combination that has minimum transfer relative power parameter after pointed sorts in step 500, then execution in step 510, set to be labeled as " TRUE ", all can't be suitable for N transformat combination of expression.
After the process above-mentioned steps selects suitable transformat combination as critical transformat combination, the present invention follows the step 104 of execution graph 2, be from the transmission relative power parameter of transmission relative power parameter, select a suitable transformat combination less than critical transformat combination.
Fig. 6 is the second embodiment of the present invention, be execution of step 300 with the first embodiment difference after, then execution in step 600, whether judge mark is " FALSE ", if then execution in step 302.Step afterwards is same with first embodiment, so do not give unnecessary details.
If judge mark is " TRUE " in step 600, then the present all transformat combination of expression all can't be suitable for, the present invention is execution in step 602 just, the transmission relative power parameter of judging comparison combination whether in Z time interval continuously all less than reference relative power parameter.If then execution in step B promptly follows the step in the execution graph 5.If not, then shown in step 604, the present invention judges no any suitable transformat combination.
By method of the present invention, wireless transmission unit can judge whether the dpdch power of each transformat combination is that system can load, make wireless transmission unit from one or more transformat combination that is suitable for, to select best transformat combination for the transmission data.
Above narration only is explanation spirit of the present invention, should be with this as restriction.Ripe this skill person can do suitable variation under the category that does not surmount claim and contained.
Claims (13)
1. method of in a wireless transmission unit, selecting a suitable transformat combination, this wireless transmission unit is applicable to a wireless communication system, this wireless transmission unit comprises:
N transformat combination, each transformat combination has a transmission relative power parameter, this transmission relative power parameter is relevant with a dpdch power of an application-specific entity of this wireless communication system control channel power and this each transformat combination, and wherein N is a positive integer; And
One with reference to the relative power parameter, is relevant with this application-specific entity control channel power;
This method comprises:
(1.1) according to the size of this transmission relative power parameter, this N transformat combination is sorted;
(1.2) according to the order after the ordering relatively should transmission relative power parameter and this with reference to the relative power parameter, and obtain a pointer; And
(1.3) select this suitable transformat combination according to this pointer.
2. the method for claim 1 more comprises:
(2) in Y the time interval, store this with reference to the numerical value of relative power parameter in each time interval, wherein Y is a positive integer.
3. method as claimed in claim 2, wherein, this wireless transmission unit comprises a mark, and whether neither suitable in order to represent this N transformat combination, this method more comprises:
(3) default this is labeled as " FALSE ", and being not that this N transformat combination is neither with expression is suitable for.
4. method as claimed in claim 3, wherein, step (1.2) more comprises:
(4.1) by selecting a transformat combination with as a comparison combination in this N transformat combination, and with this comparison combination of this pointed;
(4.2) judge at this Y in the time interval, this of this comparison combination transmit relative power parameter whether in X the time interval less than this with reference to the relative power parameter, wherein X is a positive integer less than Y;
(4.3) if this transmission relative power parameter of this comparison combination in X the time interval less than this with reference to the relative power parameter, judge then whether this pointer points to the transformat combination that has maximum transmitted relative power parameter after the ordering;
(4.4) if this pointer does not point to the transformat combination that has maximum transmitted relative power parameter after the ordering, then this pointed is should transmission relative power parameter the most approaching and greater than a transformat combination of this comparison combination;
(4.5) this pointer this transformat combination pointed in the step (4.4) is assigned as this comparison combination; And
(4.6) judge at this Y in the time interval, this of this comparison combination transmit relative power parameter whether in X the time interval less than this with reference to the relative power parameter, if then get back to step (4.3).
5. method as claimed in claim 4, wherein, step (1.2) more comprises:
(5) if in step (4.6), judge at this Y in the time interval, this of this comparison combination transmit relative power parameter not in X the time interval less than this with reference to the relative power parameter, then defining this comparison combination is a critical transformat combination.
6. method as claimed in claim 4, wherein, step (1.2) more comprises:
(6) if judge the transformat combination that has maximum transmitted relative power parameter after this pointed sorts in the step (4.3), then defining this comparison combination is a critical transformat combination.
7. method as claimed in claim 4, wherein, step (1.2) more comprises:
(7.1) if in step (4.2) this transmission relative power parameter of this comparison combination not in X the time interval less than this with reference to the relative power parameter, judge then whether this pointer points to the transformat combination that has minimum transfer relative power parameter after the ordering;
(7.2) if this pointer does not point to the transformat combination that has minimum transfer relative power parameter after the ordering, then this pointed is should transmission relative power parameter the most approaching and less than a transformat combination of this comparison combination;
(7.3) this pointer this transformat combination pointed in the step (7.2) is assigned as this comparison combination;
(7.4) this transmission relative power parameter of judging this comparison combination whether in Z time interval continuously all less than this with reference to the relative power parameter, wherein Z is a positive integer less than Y; And
(7.5) if this transmission relative power parameter of in step (7.4), judging this comparison combination not in continuous Z the time interval all less than this with reference to the relative power parameter, then get back to step (7.1).
8. method as claimed in claim 7, wherein, step (1.2) more comprises:
(8) if this transmission relative power parameter of in step (7.4), judging this comparison combination in continuous Z the time interval all less than this with reference to the relative power parameter, then defining this comparison combination is a critical transformat combination.
9. method as claimed in claim 7, wherein, step (1.2) more comprises:
(9) if in step (7.1), judge the transformat combination that has minimum transfer relative power parameter after this pointed sorts, then set this and be labeled as " TRUE ", all can't be suitable for to represent this N transformat combination.
10. method as claimed in claim 5, wherein, step (1.3) more comprises:
(10) from least one transformat combination of this transmission relative power parameter, select this suitable transformat combination less than this transmission relative power parameter of this critical transformat combination.
11. method as claimed in claim 6, wherein, step (1.3) more comprises:
(11) from least one transformat combination of this transmission relative power parameter, select this suitable transformat combination less than this transmission relative power parameter of this critical transformat combination.
12. method as claimed in claim 8, wherein, step (1.3) more comprises:
(12) from least one transformat combination of this transmission relative power parameter, select this suitable transformat combination less than this transmission relative power parameter of this critical transformat combination.
13. method as claimed in claim 7, wherein, step (1.2) more comprises:
(13.1) judge that this marks whether to be " FALSE ", if, execution in step (4.2) then;
(13.2) if this is labeled as " TRUE ", this transmission relative power parameter of then judging this comparison combination whether in continuous Z the time interval all less than this with reference to the relative power parameter; And
(13.3) if this transmission relative power parameter of judging this comparison combination in Z time interval continuously all less than this with reference to the relative power parameter, execution in step (7.1) then.
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| WO2003041317A1 (en) * | 2001-10-19 | 2003-05-15 | Interdigital Technology Corporation | System and method for fast dynamic link adaptation |
| CN1449211A (en) * | 2002-03-29 | 2003-10-15 | 华为技术有限公司 | Power control method under base station selected diversity transmission |
| US20030193913A1 (en) * | 2002-04-10 | 2003-10-16 | Shyuichi Murata | Method of selecting transport format combination, and mobile terminal apparatus |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003041317A1 (en) * | 2001-10-19 | 2003-05-15 | Interdigital Technology Corporation | System and method for fast dynamic link adaptation |
| CN1449211A (en) * | 2002-03-29 | 2003-10-15 | 华为技术有限公司 | Power control method under base station selected diversity transmission |
| US20030193913A1 (en) * | 2002-04-10 | 2003-10-16 | Shyuichi Murata | Method of selecting transport format combination, and mobile terminal apparatus |
Non-Patent Citations (1)
| Title |
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| Requirements for support of radio resourcemanagement(FDD)(Release 5). Technical,Specification,Group,Radio,Access,Network.3GPP TS 25.133 V5.10.0. 2004 * |
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