摘要： 以软交换为代表的下一代网络主要采用H.248协议对网关进行控制。该文介绍了H.248协议，提出基于IP传输协议存在的不可靠性，分析了可靠传输机制，设置3个定时器，给出一种基于IP的H.248协议可靠传输方案。初步实现结果表明，该方案可以保证事务的可靠传输，提高信令处理效率，是完全可行的。

关键词: 下一代网络, H.248协议, 网关, 可靠传输, 定时器

Abstract: H.248 has been adopted as the primary protocol to control the media gateway in Next Generation Network (NGN) soft switch system. The paper introduces the H.248 protocol briefly and advances the unreliability in transportation based on IP. Then it analyzes the mechanism of reliable transportation, and gives a solution to reliable transportation based on IP. Outcomes of the initial realization prove the feasibility of this design. It ensures the reliability of transportation and increases the efficiency of signaling process.

Key words: Next Generation Network(NGN), H.248 protocol, gateway, reliable transportation, timer

中图分类号: 

• TP393