Method of sequencing signal processing in the communication mode of a digital cellular radio system
First Claim
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1. Method of sequencing signal processing in a digital cellular radio system having a communication mode for conveying digitized speech over a communication channel between a terminal and a base station, said radio system using multiframes each comprising a sequence of frames, at least some of said frames being designated as traffic frames, said digitized speech comprising coded blocks each representing a single group of speech samples, each coded block being formed of 2·
- s sub-blocks each conveyed during a different respective traffic frame, a pth sub-block of a coded block and a (p+s)th sub-block of a preceding coded block being combined in a pth packet, each said multiframe comprising a number of traffic frames which is a multiple k of the number of sub-blocks 2·
s, any traffic frame being identified within its respective said multiframe by the expression s·
j+p, each of said traffic frames comprising at least two disjoint time slots including a first time slot for a send packet and a second time slot for a receive packet, said method comprising the steps;
during each of 2·
s·
k traffic frames s·
j+p of a current said multiframe;
performing a configuration process,processing a pth receive packet in a respective receive time slot by recovering the pth receive sub-block of a (j+n) th coded receive block and the (p+s)th receive sub-block of a (j+n-1)th coded receive block, andprocessing a pth send packet in a respective send time slot by combining a pth send sub-block of a (j+n)th coded send block and a (p+s)th send sub-block of a (j+n-1)th coded send block;
during each of 2·
k send mode traffic frames s·
j+a of a first subset of said 2·
s·
k traffic frames;
shaping a next (j+n+1)th coded send block from a group of speech samples to be sent; and
during each of 2·
k receive mode traffic frames s·
j+b of a second subset of said 2·
s·
k traffic frames;
recovering a last (j+n-1)th coded receive block and recovering any corresponding speech samples contained therein, wheres is a positive integer representative of the number of sub-blocks in a coded block divided by 2,k is a positive integer representative of the number of coded blocks in a multiframe,j is a first integer variable 0≦
j≦
2k representative of the position of a coded block within a multiframe,n is a second integer variable representative of the rank of the coded send-block whose first sub-block is sent on the first frame of said current multiframe,p is a third integer variable 0≦
p≦
s representative of the position of a sub-block within a coded block,a is first predetermined value of p representative of the position of a send frame within a coded block, andb is a second predetermined value of p representative of the position of a receive frame within a coded block.
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Abstract
In a method of sequencing signal processing in the communication mode of a digital cellular radio system for conveying digitized speech communications between a terminal and a base station by means of traffic frames each comprising time slots the terminal has a time slot for sending to the base station and a time slot for receiving from the base station. The communication comprises blocks representing groups of speech samples. Each block is formed of sub-blocks each conveyed during traffic frame time slots. During each traffic frame the following are effected: a configuration process, the processing of a receive time slot, the processing of a send time slot, the processing of a send block during a particular send traffic frame, and the processing of a receive block during a particular receive traffic frame.
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Citations
30 Claims
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1. Method of sequencing signal processing in a digital cellular radio system having a communication mode for conveying digitized speech over a communication channel between a terminal and a base station, said radio system using multiframes each comprising a sequence of frames, at least some of said frames being designated as traffic frames, said digitized speech comprising coded blocks each representing a single group of speech samples, each coded block being formed of 2·
- s sub-blocks each conveyed during a different respective traffic frame, a pth sub-block of a coded block and a (p+s)th sub-block of a preceding coded block being combined in a pth packet, each said multiframe comprising a number of traffic frames which is a multiple k of the number of sub-blocks 2·
s, any traffic frame being identified within its respective said multiframe by the expression s·
j+p, each of said traffic frames comprising at least two disjoint time slots including a first time slot for a send packet and a second time slot for a receive packet, said method comprising the steps;during each of 2·
s·
k traffic frames s·
j+p of a current said multiframe;performing a configuration process, processing a pth receive packet in a respective receive time slot by recovering the pth receive sub-block of a (j+n) th coded receive block and the (p+s)th receive sub-block of a (j+n-1)th coded receive block, and processing a pth send packet in a respective send time slot by combining a pth send sub-block of a (j+n)th coded send block and a (p+s)th send sub-block of a (j+n-1)th coded send block; during each of 2·
k send mode traffic frames s·
j+a of a first subset of said 2·
s·
k traffic frames;shaping a next (j+n+1)th coded send block from a group of speech samples to be sent; and during each of 2·
k receive mode traffic frames s·
j+b of a second subset of said 2·
s·
k traffic frames;recovering a last (j+n-1)th coded receive block and recovering any corresponding speech samples contained therein, where s is a positive integer representative of the number of sub-blocks in a coded block divided by 2, k is a positive integer representative of the number of coded blocks in a multiframe, j is a first integer variable 0≦
j≦
2k representative of the position of a coded block within a multiframe,n is a second integer variable representative of the rank of the coded send-block whose first sub-block is sent on the first frame of said current multiframe, p is a third integer variable 0≦
p≦
s representative of the position of a sub-block within a coded block,a is first predetermined value of p representative of the position of a send frame within a coded block, and b is a second predetermined value of p representative of the position of a receive frame within a coded block. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
- s sub-blocks each conveyed during a different respective traffic frame, a pth sub-block of a coded block and a (p+s)th sub-block of a preceding coded block being combined in a pth packet, each said multiframe comprising a number of traffic frames which is a multiple k of the number of sub-blocks 2·
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16. Method according to claim 16 wherein said further steps are carried out sequentially.
Specification
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Current AssigneeZ124 LLC (Flexis)
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Original AssigneeAlcatel NV (Nokia Corporation)
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InventorsDartois, Luc, Rousseau, Emmanuel
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Primary Examiner(s)Cain, David C.
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Application NumberUS07/913,836Time in Patent Office566 DaysField of Search375/1, 380/43US Class Current370/337CPC Class CodesH04B 7/2643 using time-division multipl...
