Method for rate matching between data transport channels and corresponding device, base station and mobile station

Abstract

This invention relates to a method for rate matching between at least two transport channels included within a composite channel. An object of this method is to minimize the number of the DTX symbols inserted the composite channel. This method comprises a rate matching step for each transport channel (i), a rate matching ratio (RF i ) being applied to each transport channel. The inventive method comprises a step ( 301 ) for defining, for said composite channel, a ordered list of transport channels, a step ( 302 ) for determining at least two so-called global intervals for said ordered list of transport channels, and a step ( 303 ) for assigning a scale factor (LF) to each determined global interval.

1 - 10 . (Canceled)  
     
     
         11 . A method for configuring at least one transport channel of a Code Division Multiple Access type telecommunication system, said Code Division Multiple Access type telecommunication system implementing a phase of communicating data conveyed by said at least one transport channel, said phase of communicating data comprising at least one rate matching step for each of said at least one transport channel, each of said rate matching steps executing a transformation of an input block of an initial size into an output block of a final size by puncturing or repeating at least one data of said input block according to a rate matching ratio, said rate matching ratio being applied to each of said at least one transport channel, said rate matching ratio being equal to a product of a rate matching factor and a scale factor, said rate matching factor being specific to said transport channel, each of said at least one transport channel being transmitted for at least one associated transmission time interval, each of said transmission time intervals having a duration specific to each of said at least one transport channel, said method comprising successive steps of: 
 defining a list of at least one transport channel ordered in descending order of the duration of the at least one corresponding transmission time interval, said ordered list being able to include at least one transport channel not transporting any data for at least one associated transmission time interval,    determining at least two so-called global intervals for said ordered list, said determined global intervals following each other in time, each of said determined global intervals coinciding: 
 either with the transmission time interval associated with the first transport channel of said ordered list transporting data for said associated transmission time interval,  
 or, in case none of said at least one transport channel of said ordered list is transporting any data, with the smallest transmission time interval,  
 assigning a scale factor to each of said determined global intervals, said scale factor being common to said at least one transport channel, said scale factor being constant for the duration of each corresponding determined global interval.  
   
     
     
         12 . The method according to  claim 11 , wherein at least two assigned scale factors have distinct values for at least two global intervals.  
     
     
         13 . The method according to  claim 12 , wherein at least two transport channels are included within a composite channel of said Code Division Multiple Access type telecommunication system, at least two of said transport channels having transmission time intervals with distinct durations, said method comprising the successive steps of: 
 defining, for said composite channel, a list of at least two transport channels ordered in descending order of the duration of their respective transmission time intervals, said ordered list being able to include at least one transport channel not transporting any data for at least one associated transmission time interval,    determining, for said composite channel, at least two global intervals for said ordered list, said determined global intervals following each other in time, each of said determined global intervals coinciding: 
 either with the transmission time interval associated with the first transport channel of said ordered list transporting data for said associated transmission time interval,  
 or, in case none of said at least two transport channels of said ordered list is transporting any data, with the smallest transmission time interval,  
   assigning a scale factor to each of said determined global intervals, said scale factor being common to said at least two transport channels, said scale factor being constant for the duration of each corresponding determined global interval.    
     
     
         14 . The method according to  claim 13 , wherein dummy data is inserted within said composite channel, said composite channel being transmitted on at least one physical channel, said dummy data having no energy upon transmission, and further wherein the value of each of said assigned scale factors is determined, for a corresponding determined global interval, in a manner to minimize the number of dummy data to be inserted according to the following formula:  
       
         
           
             
               
                 LFG 
                 p 
               
               = 
               
                 
                   N 
                   data 
                 
                 
                   
                     max 
                     
                       j 
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                        
                       
                         TFCSG 
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                           ( 
                           p 
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                     ( 
                     
                       
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                           k 
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                           ∈ 
                           
                               
                           
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                             MSB 
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                               j 
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                           RM 
                           
                             I 
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                             X 
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                             F 
                             
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         N data  being a maximum data rate supplied to said composite channel by said at least one physical channel;  
         k being a type of coded blocks;  
         I(k) being a transport channel generating said type k of coded blocks;  
         X k  being the number of data of said transport channel generating said type k of coded blocks before said rate matching step ;  
         F I(k)  being a ratio between the duration of said transmission time interval of said transport channel generating said type k of coded blocks and the duration of a common period, said duration of said common period being a common divisor of the duration of each of the transmission time intervals associated with said plurality of transport channels included within said composite channel;  
         MSB(j) being the plurality of coded block types for a transport format combination j; and  
         TFCSG(p) being a part of the plurality of transport format combinations, for a part p of a combination of transport formats for some considered transport channels among said plurality of transport channels included within said composite channel, including, for each transport format combination, the same transport formats for said considered transport channels and all the corresponding transport formats for the other transport channels having transmission time intervals with durations lower than or equal to the duration of said determined global interval.  
       
     
     
         15 . The method according to  claim 13  or  14 , wherein a plurality of scale factor values are determined for a plurality of determined global intervals, said method further comprising the successive steps of: 
 defining a sub-list of at least one transport channel, said sub-list including a part of the plurality of the transport channels of said ordered list from the first transport channel to a given transport channel, said sub-list being ordered in descending order of the duration of the transmission time interval associated with each of said at least one transport channel of said sub-list, and  
 substituting said sub-list to said ordered list, in order to reduce, for said composite channel, the number of scale factor values to be determined for said plurality of said determined global intervals with respect to the number of the scale factor values to be determined with the defined ordered list.  
 
     
     
         16 . The method according to any of  claims 11  to  14 , wherein said method is implemented from a radio access network comprising at least one base station to at least one mobile station of said Code Division Multiple Access type telecommunication system.  
     
     
         17 . The method according to  claim 15 , wherein said method is implemented from a radio access network comprising at least one base station to at least one mobile station of said Code Division Multiple Access type telecommunication system, and said given transport channel is selected by said radio access network of said Code Division Multiple Access type telecommunication system, said first transport channel to said given transport channel being included within said sub-list.  
     
     
         18 . A method for configuring at least one transport channel of a Code Division Multiple Access type telecommunication system implemented by a base station, said Code Division Multiple Access type telecommunication system comprising at least one base station and at least one mobile station, said Code Division Multiple Access type telecommunication system implementing a phase of communicating data conveyed by said at least one transport channel, said phase of communicating data comprising at least one rate matching step for each of said at least one transport channel, each of said rate matching steps executing a transformation of an input block of an initial size into an output block of a final size by puncturing or repeating at least one data of said input block according to a rate matching ratio, said rate matching ratio being applied to each of said at least one transport channel, said rate matching ratio being equal to a product of a rate matching factor and a scale factor, said rate matching factor being specific to said transport channel, each of said at least one transport channel being transmitted for at least one associated transmission time interval, each of said transmission time intervals having a duration specific to each of said at least one transport channel, said method comprising successive steps of: 
 defining a list of at least one transport channel ordered in descending order of the duration of the at least one corresponding transmission time interval, said ordered list being able to include at least one transport channel not transporting any data for at least one associated transmission time interval,    determining at least two so-called global intervals for said ordered list, said determined global intervals following each other in time, each of said determined global intervals coinciding: 
 either with the transmission time interval associated with the first transport channel of said ordered list transporting data for said associated transmission time interval,  
 or, in case none of said at least one transport channel of said ordered list is transporting any data, with the smallest transmission time interval,  
   assigning a scale factor to each of said determined global intervals, said scale factor being common to said at least one transport channel, said scale factor being constant for the duration of each corresponding determined global interval.    
     
     
         19 . A Code Division Multiple Access type telecommunication system comprising at least one sending entity and at least one receiving entity, said Code Division Multiple Access type telecommunication system implementing a phase of communicating data conveyed by said at least one transport channel, said phase of communicating data comprising at least one rate matching step for each of said at least one transport channel, each of said rate matching steps executing a transformation of an input block of an initial size into an output block of a final size by puncturing or repeating at least one data of said input block according to a rate matching ratio, said rate matching ratio being applied to each of said at least one transport channel, said rate matching ratio being equal to a product of a rate matching factor and a scale factor, said rate matching factor being specific to said transport channel, each of said at least one transport channel being transmitted for at least one associated transmission time interval, each of said transmission time intervals having a duration specific to each of said at least one transport channel, said Code Division Multiple Access type telecommunication system comprising: 
 means for defining a list of at least one transport channel ordered in descending order of the duration of the at least one corresponding transmission time interval, said ordered list being able to include at least one transport channel not transporting any data for at least one associated transmission time interval,    means for determining at least two so-called global intervals for said ordered list, said determined global intervals following each other in time, each of said determined global intervals coinciding: 
 either with the transmission time interval associated with the first transport channel of said ordered list transporting data for said associated transmission time interval,  
 or, in case none of said at least one transport channel of said ordered list is transporting any data, with the smallest transmission time interval,  
   means for assigning a scale factor to each of said determined global intervals, said scale factor being common to said at least one transport channel, said scale factor being constant for the duration of each corresponding determined global interval.    
     
     
         20 . A base station, wherein said base station is comprised within a Code Division Multiple Access type telecommunication system according to  claim 19.