Title :
A flexible layer one concept based on recursive systematic convolutional code for GERAN
Author :
Xu, Wen ; Boniface, Xavier
Author_Institution :
Mobile Phones, Siemens AG, Munich, Germany
Abstract :
The worldwide most successful GSM is evolving towards the third generation within the framework of 3GPP GERAN. Goal of the GERAN evolution is to realize similar services provided by UTRAN. Due to bad performance of real time packed switched speech and multimedia services based on the existing generic (E)GPRS radio bearers, a new generic physical layer, the so-called flexible layer one (FLO) based on the UTRAN layer one scheme is being standardized. This paper briefly reviews the FLO concept under the current GERAN standardization and then proposes a new FLO concept based on recursive systematic convolutional (RSC) code and the corresponding rate matching algorithm. Simulations showed that especially for high effective coding rate, the proposed GERAN FLO concept significantly outperforms the concept based on nonsystematic convolutional (NSC) code. Moreover, the RSC coding scheme offers inherently a "no coding" option without additional signaling.
Keywords :
3G mobile communication; cellular radio; circuit switching; convolutional codes; multimedia communication; packet radio networks; packet switching; 3GPP GERAN; EGPRS; FLO; GSM; NSC; RSC; UTRAN layer; enhanced general packet radio service; flexible layer one concept; multimedia service; nonsystematic convolutional code; packed switched speech service; rate matching algorithm; recursive systematic convolutional code; universal terrestrial radio access network; Channel coding; Convolution; Convolutional codes; Error correction codes; GSM; Physical layer; Radio access networks; Speech; Standardization; Switching circuits;
Conference_Titel :
Vehicular Technology Conference, 2003. VTC 2003-Fall. 2003 IEEE 58th
Print_ISBN :
0-7803-7954-3
DOI :
10.1109/VETECF.2003.1285957
