Access protocol for wireless ad hoc networks using synchronous collision resolution
First Claim
1. A method of medium access control among nodes in an ad hoc wireless network comprising:
- synchronizing the nodes to a common time;
synchronously arbitrating contention of nodes for access to a transmission channel during one or more signaling phases; and
authorizing the nodes that win an arbitration to use the transmission channel simultaneously.
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Accused Products
Abstract
An ad hoc network organizes itself to provide communications without need for an a priori designated central control mechanism or base stations. Such self-organization is challenging in a multihop ad hoc network having member nodes that are highly mobile and widely distributed. A Synchronous Collision Resolution (SCR) protocol is well suited to provide efficient medium access control is such networks. SCR is an access protocol that archives high capacity collision free access using a signaling approach that creates a random cellular-like network after each signaling period. In use, the present invention provides quality of service and supports energy conservation for the mobile nodes.
126 Citations
31 Claims
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1. A method of medium access control among nodes in an ad hoc wireless network comprising:
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synchronizing the nodes to a common time;
synchronously arbitrating contention of nodes for access to a transmission channel during one or more signaling phases; and
authorizing the nodes that win an arbitration to use the transmission channel simultaneously. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method of establishing priority of access among nodes in an ad hoc wireless network comprising:
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synchronizing the nodes to a common time;
assigning a service priority to a priority signaling slot within a priority phase based on a packet differentiator;
permitting contending nodes having packets to transmit comprising the packet differentiator to transmit a contention signal in the priority signaling slot based on the packet differentiator of a payload packet;
applying a first-to-assert preemption rule to the priority phase; and
determining at the contending nodes whether the contending node survived the priority phase contention. - View Dependent Claims (22)
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23. A method of managing stream-based packets among nodes in an ad hoc wireless network comprising:
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synchronizing the nodes to a common time;
assigning a service priority to a quality-of-service (QoS) signaling slot within a priority phase based on a packet differentiator;
synchronously arbitrating contention of nodes within the QoS signaling slot for access to a transmission channel within a constant bit rate (CBR) frame during the priority signaling phase;
determining at the contending nodes whether the contending node survived the priority phase contention within the QoS signaling slot; and
if a contending node survived the priority phase contention, then authorizing the surviving contending node to transmit in the nth-slot in the CBR frame. - View Dependent Claims (24, 25, 26)
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27. A method of establishing receiver channels in an ad hoc wireless network comprising:
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obtaining at a home node a channel selection of neighboring nodes within range of the home node'"'"'s receiver;
selecting a peer-to-peer receiver channel at the home node;
determining whether the peer-to-peer receiver channel selected by the home node is the peer-to-peer receiver channel selected by a neighboring node;
if the peer-to-peer receiver channel selected by the home node is not the peer-to-peer receiver channel selected by a neighboring node, then using the received channel selected by the home node; and
if the peer-to-peer receiver channel selected by the home node is the peer-to-peer receiver channel selected by a neighboring node, then selecting an unused peer-to-peer receiver channel. - View Dependent Claims (28, 29, 30, 31)
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Specification