System and Method for Handling Large IP Packets During VoIP Session

• US 20090046639A1
• Filed: 01/02/2008
• Published: 02/19/2009
• Est. Priority Date: 08/14/2007
• Status: Abandoned Application

• Current Assignee: Research In Motion Limited (Blackberry Limited)
• Original Assignee: Research In Motion Limited (Blackberry Limited)
• Inventors: Womack, James Earl, Cai, Zhijun
• Application Number:
  US11/968,518
• Publication Number:
  US 20090046639A1
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 47/50 Queue scheduling
• CPC Class Codes: H04L 47/625 for service slots or service orders
• CPC Class Codes: H04L 47/70 Admission control; Resource allocation
• CPC Class Codes: H04L 47/72 using reservation actions during connection setup
• CPC Class Codes: H04L 47/76 using dynamic resource allocation, e.g. in-call renegotiation requested by the user or requested by the network in response to changing network conditions
• CPC Class Codes: H04L 47/801 Real time traffic
• CPC Class Codes: H04L 47/824 Applicable to portable or mobile terminals
• CPC Class Codes: H04L 65/765 intermediate
• CPC Class Codes: H04L 65/80 Responding to QoS
• CPC Class Codes: H04Q 2213/13034 A/D conversion, code compression/expansion
• CPC Class Codes: H04Q 2213/13389 LAN, internet
• CPC Class Codes: H04W 72/04 Wireless resource allocation

Abstract

The application provides a logical channel design in which a first transmitted logical channel and a first received logical channel are used to send and receive compressed VoIP packets and uncompressed VoIP over a wireless link. A second transmitted logical channel and a second received logical channel are used to send and receive session control packets over the wireless link. The compressed VoIP packets utilize semi-persistent resource allocation whereas the uncompressed VoIP packets utilize dynamically scheduled resource allocation.

Claims

1. A method comprising:

sending and receiving compressed VoIP packets and uncompressed VoIP packets on a first transmitted logical channel and a first received logical channel over a wireless link;

sending and receiving session control packets on a second transmitted logical channel and a second received logical channel over the wireless link;

wherein sending and receiving the compressed VoIP packets utilizes semi-persistent resource allocation; and

wherein sending and receiving uncompressed VoIP packets utilizes dynamically scheduled resource allocation.

2. The method of claim 1 further comprising:

sending and receiving control packets in respect of VoIP packets.

3. The method of claim 1 wherein sending and receiving control packets in respect of VoIP packets comprises:

sending and receiving control packets in respect of VoIP packets on the first transmitted logical channel and the first received logical channel over the wireless link.

4. The method of claim 1 wherein sending and receiving control packets in respect of VoIP packets comprises:

sending and receiving control packets in respect of VoIP packets on a third transmitted logical channel and a third received logical channel over the wireless link.

5. The method of claim 1 wherein the each logical channel is a respective radio bearer or a respective RLC connection.

6. The method of claim 4 wherein the each logical channel is a respective radio bearer or a respective RLC connection.

7. The method of claim 1 wherein the compressed VoIP packets are sent and received as payload of RTP packets, the session control packets comprise SIP packets.

8. The method of claim 2 wherein the packets that control the first logical channel comprise RTCP packets.

9. The method of claim 1 wherein the sending and receiving actions are all executed by a mobile device.

10. The method of claim 1 wherein the sending and receiving actions are all executed by a network.

11. The method of claim 10 wherein the sending compressed VoIP packets and uncompressed VoIP packets on a first transmitted logical channel over a wireless link comprises:

making a semi-persistent resource allocation for a mobile device for downlink transmission and signaling the semi-persistent resource allocation from the network to the mobile device;

transmitting packets from the network to the mobile device using the semi-persistent resource allocation;

determining at the network an additional dynamic resource allocation to transmit an uncompressed VoIP packet;

transmitting from the network signaling to the mobile device that indicates the additional dynamic resource allocation; and

transmitting from the network the uncompressed VoIP packet using the additional dynamic resource allocation.

12. The method of claim 9 wherein the receiving compressed VoIP packets and uncompressed VoIP packets on a first received logical channel over a wireless link comprises:

receiving at the mobile device a semi-persistent resource allocation for downlink packet transmission;

receiving at the mobile device downlink packet transmissions on the semi-persistent resource;

on an ongoing basis, monitoring at the mobile device downlink signaling for a grant of an additional resource allocation; and

upon receipt of such a grant, receiving at the mobile device an uncompressed VoIP packet on the additional resource allocation.

13. The method of claim 10 wherein receiving compressed VoIP packets and uncompressed VoIP packets on a first received logical channel over a wireless link comprises:

making a semi-persistent resource allocation at the network for the mobile device for uplink transmission and signaling this to the mobile device;

receiving at the network packets from the mobile device using the semi-persistent resource allocation;

on an ongoing basis, monitoring at the network for uplink signaling from the mobile device containing a request for an additional uplink transmission resource allocation to transmit an additional uplink packet;

determining at the network an additional dynamic uplink resource allocation for the mobile device to transmit the uncompressed VoIP packet;

transmitting from the network signaling to the mobile device that indicates the additional dynamic resource allocation; and

receiving at the network the uncompressed VoIP packet using the additional dynamic resource allocation.

14. The method of claim 9 wherein sending compressed VoIP packets and uncompressed VoIP packets on a first transmitted logical channel over a wireless link comprises:

receiving at the mobile device a semi-persistent resource allocation for uplink packet transmission;

transmitting packets from the mobile device on the semi-persistent resource allocation;

when the mobile device has an uncompressed VoIP packet to transmit, transmitting a request from the mobile device for the grant of an additional resource allocation using uplink signaling;

monitoring at the mobile device downlink signaling for a grant of an additional uplink resource allocation;

upon receipt of such a grant, transmitting from the mobile device the uncompressed VoIP packet on the additional resource allocation.

21. The method of claim 11 wherein:

transmitting signaling to the mobile device that indicates the additional resource allocation comprises using a layer 1 control channel;

transmitting signaling to the mobile device that indicates the additional resource allocation comprises using MAC layer signaling.

22. The method of claim 21 wherein transmitting signaling using MAC layer signaling comprises transmitting an optional field in one of the packets transmitted using the semi-persistent resource allocation.

23. The method of claim 12 wherein on an ongoing basis, monitoring downlink signaling for a grant of an additional resource allocation comprises monitoring at least one of:

a layer 1 control channel;

MAC layer signaling.

24. The method of claim 13 wherein on an ongoing basis, monitoring at the network for uplink signaling from the mobile device containing a request for an additional uplink transmission resource allocation to transmit an additional uplink packet comprises monitoring at least one of:

a contention-based access channel;

a random access channel;

MAC layer signaling.

25. The method of claim 13 wherein on an ongoing basis, monitoring at the network for uplink signaling from the mobile device containing a request for an additional uplink transmission resource allocation to transmit an additional uplink packet comprises monitoring at least one of:

a contention-based access channel;

a random access channel;

MAC layer signaling.

15. An apparatus comprising:

a transmitter for transmitting compressed VoIP packets and uncompressed VoIP packets on a first transmitted logical channel over a wireless link and for transmitting session control packets on a second transmitted logical channel over the wireless link;

a receiver for receiving compressed VoIP packets and uncompressed VoIP packets on a first received logical channel over the wireless link and for receiving session control packets on a second received logical channel over the wireless link.

16. The apparatus of claim 15 wherein:

the transmitter and receiver are further configured to transmit and receive control packets in respect of VoIP packets.

17. The apparatus of claim 16 wherein the control packets in respect of VoIP packets are transmitted on the first transmitted logical channel and received on the first received logical channel over the wireless link.

18. The apparatus of claim 16 wherein:

the transmitter is further configured to send control packets in respect of VoIP packets on the third transmitted logical channel;

the receiver is further configured to receive control packets in respect of VoIP packets on the third received logical channel.

19. The apparatus of claim 15 further comprising:

a radio resource controller for setting up the first transmitted logical channel, the first received logical channel, the second transmitted logical channel and the second received logical channel over the wireless link;

a scheduler comprising;

a) a semi-persistent scheduler for scheduling compressed VoIP packets for transmission on the first transmitted logical channel and reception on the first received logical channel using semi-persistent resource allocation;

b) a dynamic scheduler for scheduling uncompressed VoIP packets for transmission on the second transmitted logical channel and reception on the second received logical channel using dynamically scheduled resource allocation.

20. The apparatus of claim 19 wherein the radio resource controller is further configured to setup a third transmitted logical channel and a third received logical channel over the wireless link;

the transmitter is further configured to send control packets in respect of VoIP packets on the third transmitted logical channel;

the receiver is further configured to receive control packets in respect of VoIP packets on the third received logical channel.