Method, network nodes and system for broadcast transmission of data

• US 20110206020A1
• Filed: 05/21/2007
• Published: 08/25/2011
• Est. Priority Date: 06/30/2006
• Status: Active Grant

• Current Assignee: Unify GmbH & Co. KG (Atos SE)
• Original Assignee: Siemens Enterprise Communications GmbH and Co KG (Mitel Networks Corporation)
• Inventors: Ziller, Andreas, Mogre, Parag Sudhir, Hollick, Matthias, Schwingenschlögl, Christian
• Granted Patent: US 8,130,731 B2
• Time in Patent Office: Days
• US Class Current: 370/337
• CPC Class Codes: H04W 72/30 Resource management for broadcast services
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks

Abstract

Disclosed are methods for broadcast transmission of data in frames having multiple time slots, from one transmitting node to multiple receiving nodes in a network, having the following steps: The sending out of at least one broadcast request message from the transmitter node to the receiver nodes, wherein the time slots available to the transmitter node for data transmission are indicated; the transmitting back of time-slot granting messages from the receiving nodes, wherein at least one of the time-slots available to the respective receiver node for data transmission is in each case indicated jointly with one at the transmitter node; the sending out of a confirmation message from the transmitter node to the neighboring receiving nodes, wherein all of the receiving nodes are indicated in the time-slot granting messages jointly with the time-slots available at the transmitter node; the performing of a broadcast transmission of the data from the transmitter node to the receiver nodes in the jointly available time slots.

Claims

1-17. -17. (canceled)

18. A method for broadcast transmission of data in frames having multiple time slots, from one transmitting node to multiple receiving nodes in a network, said method having the following steps:

sending out at least one broadcast request in an MSH-DSCH message from the transmitting node to the receiving nodes, wherein the time slots available to the transmitting node for data transmission are added in the MSH-DSCH message;

transmitting back one or more time-slot granting messages, where MSH-DSCH grant IE as grant, in MSH-DSCH messages from the receiving nodes, wherein at least one time slot available to the respective receiving node for data transmission is in each case indicated jointly with one available to the transmitting node;

sending out one or more confirmation messages, where MSH-DSCH grant IE as grant confirmation, in MSH-DSCH messages from the transmitting node to the neighboring receiving nodes, wherein all time slots available to the receiving nodes jointly with the transmitting node are indicated in the time-slot granting messages; and

performing a broadcast transmission of the data from the transmitting node, which is directed to multiple receiving nodes, in the jointly available time slots.

19. The method as claimed in claim 18, wherein the broadcast request message, where MSH-DSCH request IE, sent out by the transmitting node has an associated transmission ID.

20. The method as claimed in claim 18, wherein the broadcast request message sent out by the transmitting node has a broadcast flag set to indicate that the request message is a request for a broadcast transmission.

21. The method as claimed in claim 18, wherein the time-slot granting message transmitted back from a receiving node has a transmission ID that indicates to which request message received by the receiving node it belongs.

22. The method as claimed in claim 18, wherein the time-slot granting message transmitted back from the receiving node has a node ID of the transmitting node that indicates the receiving node to which it belongs.

23. The method as claimed in claim 18,

wherein the transmitting node sends out one or more confirmation messages with a transmission ID,

wherein a confirmation message contains all groups of successive time slots which were previously received in confirmation messages, which are marked with the specific transmission ID, from the receiving node, and which are permitted for the confirmation.

24. The method as claimed in claim 18,

wherein the nodes have node identifiers that are transmitted in the messages sent from the nodes in each case.

25. The method as claimed in claim 18, wherein, following the sending out of a broadcast request, the transmitting node temporarily stores the node IDs of the receiving nodes from which the transmitting node has received a time-slot granting message for said broadcast request message.

26. The method as claimed in claim 18, wherein, if the proportion of receiving nodes that have transmitted back a time-slot granting message in response to a broadcast request of the transmitting node is below a definable threshold, the transmitting node retransmits the respective broadcast request.

27. The method as claimed in claim 18,

wherein, if after receiving a broadcast request with an associated transmission ID a receiving node receives a time-slot granting message from another receiving node with an identical transmission ID, the receiving node in turn sends a time-slot granting message with said transmission ID,

wherein indicated in the time-slot granting message are the same time slots that are indicated in the time-slot granting message received from the other receiving node.

28. The method as claimed in claim 18, wherein the network is formed by a mesh network or a WiMax mesh network.

29. The method as claimed in claim 18, wherein the nodes are formed by mobile terminals or base stations.

30. A network node for broadcast transmission of data in frames having multiple time slots to multiple receiving nodes in a network, comprising:

a processing device and a transmitting/receiving device configured to;

send at least one broadcast request from the network node to the receiving nodes in which the time slots available to the network node for data transmission are indicated,

receive, by the network node, the time-slot granting messages transmitted back from the receiving nodes, which messages indicate at least one time slot that the respective receiving node and the transmitting node jointly have available for data transmission,

the network node sends out to the receiving nodes a confirmation message in which all time slots marked as available by the receiving nodes jointly with the transmitting node are indicated in the various time-slot granting messages,

wherein the network node subsequently performs a broadcast data transmission of the data to all receiving nodes in said jointly available time slots.

31. A system for broadcast transmission of data in frames having multiple time slots, from one transmitting node to multiple receiving nodes in a network, comprising:

a network node configured to;

send at least one broadcast request from the network node to the receiving nodes in which the time slots available to the network node for data transmission are indicated,

receive, by the network node, the time-slot granting messages transmitted back from the receiving nodes, which messages indicate at least one time slot that the respective receiving node and the transmitting node jointly have available for data transmission,

wherein the network node sends out to the receiving nodes a confirmation message in which all time slots marked as available by the receiving nodes jointly with the transmitting node are indicated in the various time-slot granting messages,

wherein the network node subsequently performs a broadcast data transmission of the data to all receiving nodes in said jointly available time slots.

32. The system as claimed in claim 31, wherein the network is a mesh network or a WiMax mesh network.

33. The system as claimed in claim 32, wherein the nodes are mobile terminals or base stations.