无线体域网中基于超帧的高效媒体接入控制方法技术

本发明专利技术公开了一种无线体域网中基于超帧的高效媒体接入控制方法，主要解决IEEE?802.15.4协议在无线体域网中，存在无法区分业务优先级和非竞争期时隙浪费的问题。其实现步骤是：在竞争期，采用基于业务优先级的时隙ALOHA竞争机制，将竞争期设置成高优先级业务专用时隙H、高优先级业务备选时隙h和普通时隙三种时隙，普通节点根据当前超帧竞争期中高优先级业务的数量，采用三种不同的竞争机制；在非竞争期，采用微时隙的机制，使保证时隙GTS业务的分配和利用以微时隙为单位进行，实现时隙的有效利用。本发明专利技术与IEEE?802.15.4协议相比，既能保证高优先级业务以更高成功概率进行传输，又能有效提高非竞争期时隙的利用率，可适用于无线体域网。

Efficient efficient media access control method based on over frame in wireless body area network

The invention discloses a wireless body area network, media access control method based on superframe, mainly to solve the IEEE? 802.15.4 protocol in wireless body area network, can not distinguish between business priorities and non competition period of time slot waste problem. The steps are: in the competition, the service priority slot ALOHA competition mechanism based on the competition period set to high priority service special slot H, high priority service alternative time slot h and ordinary slot three slot, ordinary nodes according to the number of high priority business competition in the current superframe period, using three different competition mechanism; in the non competition period, the mechanism of micro slot, so that allocation of GTS service and using micro slot as a unit, to achieve efficient use of time slots. Compared with the IEEE 802.15.4 protocol, the invention can not only ensure the higher priority service to be transmitted with higher success probability, but also effectively improve the utilization ratio of the slot in the non competition period, and can be applied to the wireless body area network.

【技术实现步骤摘要】

【技术保护点】
１．一种无线体域网中基于超帧的高效媒体接入控制方法，包括如下步骤：（１）协调点在超帧开始时广播发送信标帧，期中包括超帧长度、竞争期长度、及ＧＴＳ描述域等协议参数，各普通节点接收到信标帧后，将所有协议参数记录在本地缓存中；（２）在竞争期设置高优先级业务专用时隙Ｈ、高优先级业务备选时隙ｈ和普通时隙三种时隙，普通节点根据当前超帧竞争期中高优先级业务的数量，采用如下三种不同的竞争机制，实现高优先级业务在竞争期中以更高的概率成功传输：（２ａ）当前超帧中没有高优先级业务，即只有低优先级业务时，低优先级业务采用时隙ＡＬＯＨＡ的竞争机制在普通时隙中进行传输；（２ｂ）当前超帧里只有一个高优先级业务，即同时存在一...

【技术特征摘要】

【专利技术属性】
技术研发人员：李长乐，王玲玲，张坤，刘永俊，李建东，武倩倩，
申请(专利权)人：西安电子科技大学，
类型：发明
国别省市：87