Method and apparatus for managing packet data loss in a wireless network

• US 20060007862A1
• Filed: 06/01/2005
• Published: 01/12/2006
• Est. Priority Date: 07/06/2004
• Status: Active Grant

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola Mobility, Inc. (Lenovo Group Ltd.)
• Inventors: Sayeedi, Shahab M., Farcasanu, Anda M.
• Granted Patent: US 7,668,141 B2
• Time in Patent Office: Days
• US Class Current: 370/235
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 47/266 Stopping or restarting the source, e.g. X-on or X-off
• CPC Class Codes: H04L 47/32 by discarding or delaying data units, e.g. packets or frames
• CPC Class Codes: H04W 28/10 Flow control between communication endpoints
• CPC Class Codes: H04W 28/12 using signalling between network elements
• CPC Class Codes: H04W 36/02 Buffering or recovering information during reselection ; Modification of the traffic flow during hand-off
• CPC Class Codes: H04W 76/22 Manipulation of transport tunnels
• CPC Class Codes: H04W 8/04 Registration at HLR or HSS [Home Subscriber Server]

Abstract

Various embodiments are described to address the need for more effective management of packet data loss in wireless communication systems. When a packet data destination (131) that is receiving a flow of packets for a packet data service instance indicates to the packet data source (141) of the flow that the flow should be suspended, it also indicates to the source how to process packets for the service instance while the flow transmission is suspended. For example, the packet data destination may indicate an event or condition that is triggering the flow suspension, the source can then begin buffering packets, discarding packets, starting timers, and/or taking other packet processing actions to manage packet data loss in view of the packet data destination'"'"'s indication. Alternatively, the packet data destination may explicitly indicate the packet processing actions the source should take while the packet flow is suspended.

Claims

1. A method for managing packet data loss in a wireless network comprising:

receiving, by a packet data destination from a packet data source, a flow of packets for a packet data service instance;

transmitting, by the packet data destination to the packet data source, an indication to suspend transmitting the flow of packets for the packet data service instance; and

transmitting, by the packet data destination to the packet data source, an indication of how to process packets for the packet data service instance while the flow transmission is suspended.

2. The method of claim 1, further comprising:

forwarding, by the packet data destination to a target unit, packets from the flow of packets; and

determining, by the packet data destination, that the packet data destination is no longer able to successfully forward packets from the flow of packets to the target unit,

wherein transmitting the indication to suspend comprises transmitting the indication to suspend in response to determining that the packet data destination is no longer able to successfully forward packets from the flow of packets to the target unit and

wherein transmitting the indication of how to process packets comprises transmitting the indication of how to process packets in response to determining that the packet data destination is no longer able to successfully forward packets from the flow of packets to the target unit.

3. The method of claim 2, wherein determining that the packet data destination is no longer able to successfully forward packets from the flow of packets to the target unit comprises determining that a condition is present from the group consisting of a buffer overflow condition within the packet data destination, a handoff in-progress condition, a packet data paging failure condition, and a preemption of packet data service by a circuit service condition.

4. The method of claim 1, wherein the indication to suspend transmitting the flow of packets comprises signaling that includes a flow control indication of transmit off (XOFF).

5. The method of claim 1, wherein the indication of how to process packets comprises signaling that indicates a condition is present at the packet data destination.

6. The method of claim 5, wherein the condition indicated comprises a condition from the group consisting of a buffer-overflow-discard-packets condition, a packet-data-paging-failure-discard-packets condition, a Voice Precedence Over Packet (VPOP) condition, a 1xEV-DO Circuit Services Notification condition, a preemption of packet data service by a circuit service condition, a buffer-overflow-hold-packets condition, a handoff in-progress condition, and a packet-data-paging-failure-hold-packets condition.

7. The method of claim 1, wherein the indication of how to process packets comprises signaling that indicates a timer value for a packet data source buffering period.

8. The method of claim 1, wherein the indication of how to process packets comprises signaling that indicates a timer value for a packet data source transmission suspension period.

9. The method of claim 1, wherein the indication of how to process packets comprises signaling that provides packet processing instructions for the packet data source.

10. The method of claim 9, wherein the packet processing instructions for the packet data source comprise an instruction from the group consisting of an instruction to buffer packets for the packet data service instance while the flow transmission is suspended, and instruction to buffer packets for the packet data service instance for an indicated period of time while the flow transmission is suspended, an instruction to discard packets for the packet data service instance while the flow transmission is suspended, and an instruction to resume flow transmission for the packet data service instance after an indicated period of time.

11. A method for managing packet data loss in a wireless network comprising:

transmitting, by a packet data source to a packet data destination, a flow of packets for a packet data service instance;

receiving, by the packet data source from the packet data destination, an indication to suspend transmitting the flow of packets for the packet data service instance;

receiving, by the packet data source from the packet data destination, an indication of how to process packets for the packet data service instance while the flow transmission is suspended;

suspending, by the packet data source, transmission of the flow of packets for the packet data service instance to the packet data destination, in response to the indication to suspend; and

processing, by the packet data source, packets for the packet data service instance while the flow transmission is suspended in accordance with the indication of how to process packets.

12. The method of claim 11, wherein the indication to suspend transmitting the flow of packets comprises signaling that includes a flow control indication of transmit off (XOFF).

13. The method of claim 11, wherein the indication of how to process packets comprises signaling that indicates a condition is present at the packet data destination.

14. The method of claim 13, wherein processing packets for the packet data service instance while the flow transmission is suspended comprises discarding packets for the packet data service instance when the condition indicated comprises a condition from the group consisting of a buffer-overflow-discard-packets condition, a packet-data-paging-failure-discard-packets condition, a Voice Precedence Over Packet (VPOP) condition, a 1xEV-DO Circuit Services Notification condition, and a preemption of packet data service by a circuit service condition.

15. The method of claim 13, wherein processing packets for the packet data service instance while the flow transmission is suspended comprises buffering packets for the packet data service instance when the condition indicated comprises a condition from the group consisting of a buffer-overflow-hold-packets condition, a handoff in-progress condition, and a packet-data-paging-failure-hold-packets condition.

16. The method of claim 11,

wherein the indication of how to process packets comprises signaling that indicates a timer value for a packet data source buffering period and

wherein processing packets for the packet data service instance while the flow transmission is suspended comprises buffering packets for the packet data service instance for a period of time defined by the timer value.

17. The method of claim 11,

wherein the indication of how to process packets comprises signaling that indicates a timer value for a packet data source transmission suspension period,

wherein processing packets for the packet data service instance while the flow transmission is suspended comprises buffering packets for the packet data service instance for a period of time defined by the timer value, and

wherein the method of claim 11 further comprises resuming, by the packet data source to the packet data destination, transmission of the flow of packets, including packets buffered, for the packet data service instance at the end of the period of time defined by the timer value.

18. The method of claim 11, wherein processing packets for the packet data service instance while the flow transmission is suspended comprises:

buffering packets for the packet data service instance while a buffer timer runs;

discarding the packets that have been buffered upon the buffer timer expiration.

19. The method of claim 11, wherein the indication of how to process packets comprises signaling that provides packet processing instructions for the packet data source.

20. The method of claim 19, wherein the packet processing instructions for the packet data source comprise an instruction from the group consisting of an instruction to buffer packets for the packet data service instance while the flow transmission is suspended, an instruction to buffer packets for the packet data service instance for an indicated period of time while the flow transmission is suspended, an instruction to discard packets for the packet data service instance while the flow transmission is suspended, and an instruction to resume flow transmission for the packet data service instance after an indicated period of time.

21. The method of claim 11, wherein processing packets for the packet data service instance while the flow transmission is suspended comprises:

discarding packets for the packet data service instance;

preventing the counting of the discarded packets for user payment purposes.

22. The method of claim 11, wherein processing packets for the packet data service instance while the flow transmission is suspended comprises buffering packets for the packet data service instance and wherein the method of claim BO further comprises:

receiving, by the packet data source, an indication to resume transmitting the flow of packets for the packet data service instance, and

resuming, by the packet data source to the packet data destination, transmission of the flow of packets, including packets buffered, for the packet data service instance in response to the indication to resume.

23. The method of claim 22, wherein the indication to resume transmitting the flow of packets comprises signaling from the group consisting of signaling that includes a flow control indication of transmit on (XON) and signaling that indicates a handoff has completed.

24. A packet data destination node for managing packet data loss in a wireless network, the packet data destination node comprising:

a network interface adapted to send and receive messaging using at least one communication protocol;

a processor, communicatively coupled to the network interface,

adapted to receive, from a packet data source via the network interface, a flow of packets for a packet data service instance,

adapted to transmit, to the packet data source via the network interface, an indication to suspend transmitting the flow of packets for the packet data service instance, and

adapted to transmit, to the packet data source via the network interface, an indication of how to process packets for the packet data service instance while the flow transmission is suspended.

25. The packet data destination node of claim 24, wherein the packet data destination node comprises a system component from the group consisting of a radio access network (RAN), a packet control function (PCF), a base station (BS), and a mobile station (MS).

26. A packet data source node for managing packet data loss in a wireless network, the packet data source node comprising:

a network interface adapted to send and receive messaging using at least one communication protocol;

a processor, communicatively coupled to the network interface,

adapted to transmit, to a packet data destination via the network interface, a flow of packets for a packet data service instance,

adapted to receive, from the packet data destination via the network interface, an indication to suspend transmitting the flow of packets for the packet data service instance,

adapted to receive, from the packet data destination via the network interface, an indication of how to process packets for the packet data service instance while the flow transmission is suspended,

adapted to suspend transmission of the flow of packets for the packet data service instance to the packet data destination, in response to the indication to suspend, and adapted to process packets for the packet data service instance while the flow transmission is suspended in accordance with the indication of how to process packets.

27. The packet data source node of claim 26, wherein the packet data source node comprises a system component from the group consisting of a packet data serving node (PDSN), a radio access network (RAN), a packet control function (PCF), and a base station (BS).