US 2013/0094429 A1Published application

Method for retransmitting multicast frames and method for processing received multicast frames in wireless network

AssigneeLG Electronics Inc.

InventorYongho SEOK

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Abstract

A method for retransmitting a multicast frame in a wireless network and for determining whether a received multicast frame is a duplicated frame. In determining whether the received multicast frame is the same duplicated frame as a previously received multicast frame, a receiver address value and a sequence number of the multicast frame may be used. When fragmentation of a multicast frame is allowed, the value of a fragment number of the multicast frame may be also used, and if it includes a traffic ID, the value of the traffic ID can be also used for determining whether or not the multicast frame is a duplicated frame. If a multicast frame is transmitted in a wireless mesh network, it is determined whether or not the multicast frame is a duplicated one by using a mesh source address, a mesh destination address, and a sequence number.

Claims8

Dependent claims

A method of multicasting data in a wireless communication network, comprising:

transmitting, by a transmitter, a first multicasting frame, the first multicasting frame including a first receiver address, a first transmitter address and a first retry bit, the first receiver address including a first multicasting address, the first retry bit being set to zero;
and
transmitting, by the transmitter, a second multicasting frame, the second multicasting frame including a second receiver address, a second transmitter address and a second retry bit, the second receiver address including a second multicasting address, the second transmitter address being same as the first transmitter address, the second retry bit being set to one,
wherein, if the second multicasting frame is a retransmission of the first multicasting frame, the second multicasting address is different from the first multicasting address,
wherein the first and second multicasting addresses each include a corresponding plurality of bits, and
wherein at least one bit of the second multicasting address is set to a different value than at least corresponding bit of the first multicasting address so that a legacy receiving device which does not support multicast retransmission does not process the second multicasting frame.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/707,225Filed 6 Dec 2012
Priority: KR 10-2007-010230410 Oct 2007
Published: 18 Apr 2013
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

H04L 12/189
For broadcast or conference , e.g. multicast: in combination with wireless systems
H04L 1/1829
Automatic repetition systems, e.g. Van Duuren systems: arrangements specially adapted for the receiver end
H04L 1/1887
Arrangements specially adapted for the transmitter end: scheduling and prioritising arrangements
H04L 2001/0093
Error control systems characterised by the topology of the transmission link: point-to-multipoint

Family

Application12/514,536Continuation · filed 12 May 2009
Application13/707,225Continuation
US 2009/0290524 A1Published application
US 8,351,365 B2Related patent
US 8,787,238 B2Related patent
US 2013/0094429 A1This patent

From the US filing history. Foreign family members aren’t listed.