Method of reserving resources with a maximum delay guarantee for multi-hop transmission in a distributed access wireless communications network
First Claim
1. In a communication network (100) comprising a plurality of devices (110) communicating using a reservation-based data transfer protocol having a superframe (600) comprising a plurality of slots (610), a method (400) of reserving X slots (610) for transmitting data from a source device (110A) to a destination device (110D) via multi-hop relay, the method comprising:
- sending (410) a first hop reservation request from the source device (110A), addressed to a second device (110) different from the destination device (110D), for transmitting data from the source device (110A) to the destination device (110D), the first hop reservation request identifying the source device (110A), the destination device (110D), and X proposed slots (610) to be reserved for a first hop between the source device (110A) and the second device (110);
at the source device (110A) receiving (425) a first message, addressed to the source device (110A) from the second device (110), indicating that the first hop reservation request is pending and that the X slots (610) proposed by the source device (110A) have been reserved by the second device (110); and
at the source device (110A) receiving (455) a subsequent message, addressed to the source device (110A) from the second device (110), indicating that a final hop reservation request has been accepted by the destination device (110D), corresponding to the first hop reservation request of the source device (110A).
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Abstract
In a communication network (100), a method (400) of reserving X slots (610) for transmitting data from a source device (110A) to a destination device (110D) via multi-hop relay includes sending a first hop reservation request from the source device (110A) to a second device (110), for transmitting data from the source device to the destination device. The first hop reservation request identifies the source device, the destination device, and X proposed slots (610) to be reserved for the first hop. The source device then receives a first message, addressed to the source device from the second device, indicating that the first hop reservation request is pending and that the X slots proposed by the source device have been reserved by the second device. Later, the source device receives a subsequent message indicating whether a final hop reservation request has been accepted by the destination device.
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Citations
19 Claims
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1. In a communication network (100) comprising a plurality of devices (110) communicating using a reservation-based data transfer protocol having a superframe (600) comprising a plurality of slots (610), a method (400) of reserving X slots (610) for transmitting data from a source device (110A) to a destination device (110D) via multi-hop relay, the method comprising:
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sending (410) a first hop reservation request from the source device (110A), addressed to a second device (110) different from the destination device (110D), for transmitting data from the source device (110A) to the destination device (110D), the first hop reservation request identifying the source device (110A), the destination device (110D), and X proposed slots (610) to be reserved for a first hop between the source device (110A) and the second device (110); at the source device (110A) receiving (425) a first message, addressed to the source device (110A) from the second device (110), indicating that the first hop reservation request is pending and that the X slots (610) proposed by the source device (110A) have been reserved by the second device (110); and at the source device (110A) receiving (455) a subsequent message, addressed to the source device (110A) from the second device (110), indicating that a final hop reservation request has been accepted by the destination device (110D), corresponding to the first hop reservation request of the source device (110A). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. In a communication network (100) comprising a plurality of devices (110) communicating using a reservation-based data transfer protocol having a superframe (600) comprising a plurality of slots (610), a method (500) of reserving slots (610) for transmitting data from a source device (110A) to a destination device (110D) via multi-hop relay, the method (500) comprising:
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(1) receiving (515) at an Nth device (110) an (N−
1)th hop reservation request for transmitting data from a source device (110A) to a destination device (110D) via multi-hop relay, the reservation request identifying the source device (110A), the destination device (110D), and X proposed slots (610) to be reserved for an (N−
1)th hop between an (N−
1)th device (110) and the Nth device (110);(2) when the X proposed slots (610) to be reserved for the (N−
1)th hop are available at the Nth device (110);(2a) transmitting (520) an (N−
1)th message from the Nth device (110), addressed to the (N−
1)th device (110), indicating that the reservation request is pending and that the X slots (610) proposed by the (N−
1)th device (110) have been reserved by the Nth device (110), and(2b) sending (530) an Nth hop reservation request from the Nth device (110), addressed to an (N+1)th device (110), for transmitting the data from the source device (110A) to the destination device (110D), the Nth hop reservation request identifying the source device (110A), the destination device (110D), and X proposed slots (610) to be reserved for an Nth hop between the Nth device (110) and the (N+1)th device (110), wherein the X slots (610) proposed by the Nth device (110) to be reserved for the Nth hop are different from the X slots (610) proposed by an (N−
1)th device (110) to be reserved for the (N−
1)th hop; and(3) when the X proposed slots (610) to be reserved for the (N−
1)th hop are not available at the Nth device (110), transmitting (518) an (N−
1)th message from the Nth device (110), addressed to the (N−
1)th device (110), indicating that the reservation request is denied. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification