Network channel access protocol - interference and load...

H - Electricity – 04 – W

Patent

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Details

H04W 72/12 (2009.01) H04W 16/10 (2009.01) H04W 84/12 (2009.01)

Patent

CA 2444433

Network channel access protocol is disclosed. More particularly, a distributed, locally determined, channel access protocol that adapts to load, avoids interference and controls access by a group of nodes to a set of shared channels is disclosed. Shared channel space is divided into a number of communication slots that are repeated at a predetermined interval. Permission to use a slot to communicate between any two nodes is dynamically adjusted by the channel access protocol, which locally: (i) estimates load to neighboring nodes; (ii) allocates or deallocates slot usage to adapt to load and avoid interference; and (iii) asserts and advertises slot usage within an interference area about itself.

La présente invention concerne un protocole d'accès aux voies d'un réseau et, en particulier, un protocole d'accès au voies distribué, localement déterminé, qui s'adapte aux charges, évite les interférences et règle l'accès par un groupe de noeuds à un ensemble de voies partagées. L'espace des voies partagées est divisé en un nombre de créneaux de communication qui se répètent à un intervalle prédéterminé. L'autorisation d'utiliser un créneau pour communiquer entre deux noeuds quelconques est réglée de façon dynamique par le protocole d'accès aux voies de l'invention qui, localement : (i) estime la charge pour les noeuds environnants ; (ii) attribue ou retire l'usage du créneau afin d'adapter la charge et d'éviter les interférences ; et (iii) confirme et annonce l'usage du créneau dans les limites d'une zone d'interférences qui l'entoure.

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