Memotec - Bandwidth Compression Solutions for GSM Cellular Mobile Networks

Memotec's CX platform features a wide range of access (RAN) and core network optimization solutions for GSM cellular networks based on voice and data bandwidth compression. It includes link optimization solutions for Abis interface (BTS to BSC links), A and Ater interface (BSC to MSC links), and E interface (MSC to MSC and MSC to PSTN telephony links).

With more than 400 links already deployed and multiple GSM networks in operation in Africa and Asia, Memotec offers proven and reliable solutions to cellular operators for transmission cost reduction.

The Memotec CX can accommodate any transmission technology and network protocol (TDM, Frame-Relay, ATM, IP), providing GSM 2G / 2.5G mobile operators a migration path to 3G (CDMA, UMTS) while delivering substantial cost savings to mobile operators using offnet transmission facilities, and in particular satellite links.

THE MEMOTEC CX IP-RAN (ABIS) GATEWAY AND BANDWIDTH COMPRESSION SOLUTION

The Memotec CX is a unique RAN (Abis) packet gateway solution which converts a 2G RAN or 2.5G GERAN into an IP-RAN, while providing bandwidth optimization. The technology is based on packetization of the TDM Abis interface and suppression of empty time slots or non-value information (idle frames, silence frames) in each voice channel. Since no transcoding is involved, the Abis payload and the voice quality is preserved.

The CX sits at the Abis interface, at each end of the transmission link between the BTS and the BSC, connecting transparently the BTS to the transmission device (e.g. satellite modem) at the remote end, and to the BSC at the other end, while providing the interface and protocol adaptation to the transmission facility (TDM, Frame-Relay, ATM or IP).

The CX delivers up to 50% bandwidth savings at the Abis interface when compared to traditional TDM Drop and Insert, and has been tested and validated with all the major GSM vendors. The data compression capability will also help keep transmission backhaul costs under control as operators introduce 2.5G services (GPRS or EDGE).

EXTENDING CELLULAR REACH WITH MEMOTEC ABISXTENDER™

The Memotec AbisXtender™ is a bundled solution designed to enable mobile operators to extend cellular services to "out of coverage" areas.

The Memotec AbisXtender™ enables operators to cost efficiently deploy BTSs in remote or low-density areas with the highest reliability, increasing their revenue stream and service coverage. The solution combines a state-of-the-art SCPC modem from Comtech EFDATA with the Memotec CX IP-RAN Gateway bandwidth optimization solution.

Unlike conventional terrestrial deployment, with AbisXtender™ one BSS cluster can span an entire region or country, yielding additional cost savings by centralizing BSCs to the MSC core and eliminating costly backbone transmission links.

With AbisXtender™, cellular operators can lower by 40% the minimum number of subscribers required for sustaining profitable service deployment, and save up to 70% on the satellite transponder resources when compared to conventional satellite backhaul solutions for a BSS cluster of 20 remote sites or more.

MEMOTEC CELLULAR DCME SOLUTIONS FOR THE NETWORK CORE

Memotec delivers a unique and scalable DCME solution which addresses the specific needs of evolving cellular core backbone. First, the Memotec DCME solution grooms and multiplexes Ater or A/E voice trunks with service data (IT, IN) and user data (EDGE / GPRS) data traffic. Second, it provides a flexible adaptation to data-centric backbone infrastructure (ATM or IP).

Memotec's DCME solution also guarantees superior toll-grade quality 16:1 voice compression and delivers bandwidth compression for SS7 traffic (4:1) as well as for data traffic at the Gb or Gn interface.

Last but not least, Memotec's Transcoder Free Operation is a key component in making the DCME solution ideal for deploying services over satellite in remote areas where multiple hops are required, avoiding multiple voice compression / decompression cycles and therefore preserving voice quality.