Controlling the rate of data transfer over a wireless link

• US 20040001536A1
• Filed: 06/27/2002
• Published: 01/01/2004
• Est. Priority Date: 06/27/2002
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Nortel Networks Limited (Nortel Networks Corporation)
• Inventors: Lohtia, Anit, Tang, Yuqiang, Paranchych, David W.
• Granted Patent: US 7,116,708 B2
• Time in Patent Office: Days
• US Class Current: 375/225
• CPC Class Codes: H04W 28/22 Negotiating communication rate

Abstract

A wireless communications network includes a mobile station and wireless access equipment. In communications between the wireless access equipment and the mobile station (such as in the forward link), a data rate is specified. However, the effective data rate can be reduced (with respect to the specified data rate) if it is determined that the specified data rate is not needed. In one arrangement, the effective data rate is reduced by waiting to fill a physical layer packet before transmission.

Claims

1. A method of wireless communication, comprising:

receiving an indication of a data rate for communicating data over a wireless link between a mobile station and wireless access equipment;

determining whether the data rate specified by the indication is greater than a rate at which data to be communicated over the wireless link is received by one of the mobile station and wireless access equipment; and

reducing an effective data rate of communicating data over the wireless link in response to a determination that the data rate specified by the indication is greater than the rate at which data to be communicated over the wireless link is received.

2. The method of claim 1, wherein receiving the indication comprises receiving a data rate indication to specify a data rate for communicating the data over a forward traffic channel of the wireless link.

3. The method of claim 2, wherein receiving the data rate indication comprises receiving a forward channel data rate indication according to a packet-switched wireless protocol.

4. The method of claim 3, wherein receiving the forward channel data rate indication comprises receiving a forward channel data rate indication according to one of a 1xEV-DO protocol, 1xEV-DV protocol, and High Speed Downlink Packet Access (HSDPA) protocol.

5. The method of claim 1, further comprising varying a size of a physical layer packet for communicating data over the wireless link based on the data rate specified by the indication.

6. The method of claim 5, wherein the physical layer packet is capable of carrying plural higher protocol layer packets, and

wherein reducing the effective data rate comprises waiting to fill the physical layer packet with one or more additional higher level packets.

7. The method of claim 6, wherein waiting to fill the physical layer packet comprises waiting up to a set maximum time.

8. The method of claim 7, further comprising transmitting a partially filled physical layer packet in response to waiting greater than the set maximum time.

9. The method of claim 6, further comprising varying a wait time in waiting to fill the physical layer packet to vary the effective data rate.

10. The method of claim 1, wherein determining whether the data rate specified by the indication is greater than the rate at which data to be communicated over the wireless link is received comprises detecting that an outbound physical layer packet is partially filled.

11. The method of claim 10, wherein reducing the effective data rate of communicating data over the wireless link comprises waiting to fill the outbound physical layer packet.

12. An article comprising at least one storage medium containing instructions that when executed cause a system to:

provide a scheduling procedure for wireless communications between a mobile station and a wireless access equipment;

receive a specified data rate for the wireless communications; and

provide an effective data rate that is different from the specified data rate in response to determining that the specified data rate is greater than a rate at which data to be communicated wirelessly is received by one of the mobile station and the wireless access equipment.

13. The article of claim 12, wherein the instructions when executed cause the system to perform the determining by detecting that an outbound physical layer packet is partially filled.

14. The article of claim 12, wherein the instructions when executed cause the system to receive the specified data rate by receiving a data rate for communicating data over a forward traffic channel of the wireless link.

15. The article of claim 12, wherein the instructions when executed cause the system to receive the specified data rate by receiving a forward channel data rate indication according to a packet-switched wireless protocol.

16. The article of claim 12, wherein the instructions when executed cause the system to vary the effective data rate by controlling a wait time to fill a physical layer packet to be communicated between the mobile station and the wireless access equipment.

17. The article of claim 16, wherein the instructions when executed cause the system to insert medium access control (MAC) packets into the physical layer packet.

18. The article of claim 16, wherein the instructions when executed cause the system to transmit a partially filled physical layer packet in response to waiting greater than a set maximum time.

19. The article of claim 12, wherein the instructions when executed cause the system to receive the specified data rate by receiving the specified data rate in a data rate control (DRC) channel according to a I xEV protocol.

20. The article of claim 12, wherein the wireless communications is defined by one of a 1xEV-DO protocol, 1xEV-DV protocol, and UMTS-based protocol.

21. A wireless network control apparatus, comprising:

an interface to a wireless link for communicating wirelessly with a mobile station; and

a controller adapted to;

receive a specified data rate for communicating data with the mobile station,

determine whether the specified data rate is greater than a rate at which data to be communicated wirelessly is received by the wireless network control apparatus, and

provide an effective data rate in communicating the data with the mobile station, the effective data rate being different from the specified data rate, in response to determining that the specified data rate is greater than the rate at which data to be communicated wirelessly is received by the wireless network control apparatus.

22. The wireless network control apparatus of claim 21, wherein the controller is adapted to receive the specified data rate from the mobile station, the specified data rate specifying a data rate for communicating data over a forward traffic channel of the wireless link.

23. The wireless network control apparatus of claim 21, wherein the controller is adapted to vary the effective data rate by controlling a wait time to fill a physical layer packet to be communicated between the wireless network control apparatus and the mobile station.

24. The wireless network control apparatus of claim 23, wherein the controller is adapted to transmit a partially filled physical layer packet in response to waiting greater than a set maximum time.

25. The wireless network control apparatus of claim 21, wherein the interface is adapted to communicate over the wireless link according to one of a 1xEV-DO, 1xEV-DV protocol, and HSDPA protocol.

26. The wireless network control apparatus of claim 21, wherein the controller is adapted to receive the specified data rate by receiving the specified data rate in a data rate control (DRC) channel according to a 1xEV protocol.