| Publisher | Aricent | ||
|---|---|---|---|
| Format | 646.3KB PDF | Date added | 01 Oct 2006 |
| Topics | Bandwidth Issues, Industry Standard Protocols, Mobile - Wireless Communications | ||
| Downloads | 10 | ||
The Internet Engineering Task Force (IETF) has adopted the Session Initiation Protocol (SIP) for establishing, controlling, and maintaining real-time wireless multimedia sessions within an Internet Protocol-based framework. SIP is an ASCII text-based signalling protocol similar to HTTP. Its text-based nature results in long messages, which makes signaling inefficient over bandwidth limited wireless channels. Scarcity of radio resources reinforces the need of compression techniques for signaling information. The radio resource, that is the available frequency spectrum, in wireless communication systems (especially cellular environments, such as GSM and GPRS), remains a limiting factor in terms of the bandwidth available to an individual user. Large message size of signaling protocols, such as SIP, coupled with relatively low data rates across the radio interface will result in significant transmission delays.
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