Method and a system for transferring AMR signaling frames on halfrate channels

• US 7,415,045 B2
• Filed: 08/27/2001
• Issued: 08/19/2008
• Est. Priority Date: 08/27/2001
• Status: Expired due to Fees

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Nokia Corporation
• Inventors: Bellier, Thierry, Sebire, Benoist
• Primary Examiner(s): Pham, Chi H.
• Assistant Examiner(s): BOAKYE, ALEXANDER O
• Application Number:
  US10/485,031
• Publication Number:
  US 20040240566A1
• Time in Patent Office: 2,549 Days
• Field of Search: 370/521, 370/522, 370/524, 370/252, 370/329, 370/468, 370/337, 370/347, 370/431, 370/330, 370/336, 370/442, 370/310, 370/345, 370/335, 370/498, 370/348, 370/478, 370/535, 370/208, 370/537, 370/328, 375/259, 455/522, 455/574
• US Class Current: 370/521
• CPC Class Codes: H04L 1/0041 Arrangements at the transmitter end
• CPC Class Codes: H04L 1/0045 Arrangements at the receiver end
• CPC Class Codes: H04L 1/0067 Rate matching H04L1/0013 and H04L1/08 take precedence
• CPC Class Codes: H04L 1/0072 Error control for data other than payload data, e.g. control data
• CPC Class Codes: H04L 1/08 by repeating transmission, e.g. Verdan system H04L1/1858 and H04L1/189 take precedence
• CPC Class Codes: H04L 2001/125 Arrangements for preventing errors in the return channel
• CPC Class Codes: H04L 27/2017 in which the phase changes are non-linear, e.g. generalized and Gaussian minimum shift keying, tamed frequency modulation H04L27/201 takes precedence

Abstract

The present invention relates to the transference of signaling frames on GERAN (GSM/EDGE radio Access Network) half rate channels utilizing a modulation scheme carrying n bits in one symbol. In order to be able to utilize the existing channel coding developed for channels with different modulations and to avoid high rate convolutional and block codes, the AMR signaling frame to be transferred is coded using a coding procedure defined for a GSM half rate channel utilizing a GMSK modulation scheme, the coding procedure outputting a coded output stream. In response to said coding, each bit of the coded output stream is repeated n times, whereby a repeated bit stream is obtained, and symbols to be transmitted are formed from the repeated bit stream.

Claims

1. A system for processing an AMR signaling frame to be transmitted on a GERAN half rate channel utilizing a modulation scheme carrying n bits (n>

/=2) in one symbol, the system comprising;

coder part (300), compatible with coder defined for a GSM half rate channel utilizing a GMSK modulation scheme, said coder part being adapted to output a coded bit stream,

repeater (309), responsive to the coder part, for repeating each bit of the coded bit stream n times, whereby a repeated bit stream is obtained, and

symbol former (310), responsive to said repeater, for forming symbols to be transmitted from said repeated bit stream.

2. A system for processing an AMR signaling frame received on a GERAN half rate channel utilizing a modulation scheme carrying n bits (n>

/=2) in one symbol, the system comprising;

converter (324), for converting a received symbol stream to a first bit stream,

processor (325), for segmenting the first bit stream into successive blocks, each block consisting of n bits, and for converting each block into one bit, whereby a second bit stream is obtained, and

decoder part (340), compatible with decoder defined for a GSM half rate channel utilizing a GMSK modulation scheme, said decoder part being adapted to decode said second bit stream.

3. A method for processing an AMR signaling frame to be transmitted on a GERAN half rate channel utilizing a modulation scheme carrying n bits (n>

/=2) in one symbol, the method comprising the steps of;

coding the AMR signaling frame using a coding procedure defined for a GSM half rate channel utilizing a GMSK modulation scheme, the coding procedure outputting a coded output stream,

in response to said coding, repeating each bit of the coded output stream n times, whereby a repeated bit stream is obtained, and

forming symbols to be transmitted from the repeated bit stream.

4. A method for processing an AMR signaling frame received on a GERAN half rate channel utilizing a modulation scheme carrying n bits (n>

/=2) in one symbol, the method comprising the steps of;

converting a received symbol stream into a first bit stream,

segmenting said first bit stream into successive blocks, each block consisting of n bits,

converting each block into one bit, whereby a second bit stream is obtained, and

decoding said second bit stream using a coding procedure defined for a GSM half rate channel utilizing a GMSK modulation scheme.

5. A system for transferring an AMR signaling frame on a GERAN half rate channel utilizing a modulation scheme carrying n bits (n>

/=2) in one symbol, the system comprising

at a transmitting end;

coder part (300), compatible with coder defined for a GSM half rate channel utilizing a GMSK modulation scheme, said coder part being adapted to output a coded bit stream,

repeater (309), responsive to the coder part, for repeating each bit of the coded bit stream n times, whereby a repeated bit stream is obtained, and

symbol former (310), responsive to said repeater, for forming symbols to be transmitted from said repeated bit stream, and

at a receiving end;

converter (324), for converting a received symbol stream to a first bit stream,

processor (325), for segmenting the first bit stream into successive blocks, each block consisting of n bits, and for converting each block into one bit, whereby a second bit stream is obtained, and

decoder part (340), compatible with decoder defined for a GSM half rate channel utilizing the GMSK modulation scheme, said decoder part being adapted to decode said second bit stream.