Token passing data transfer mechanism for reservation based protocols

• US 20090080456A1
• Filed: 08/01/2008
• Published: 03/26/2009
• Est. Priority Date: 08/03/2007
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Staccato Communications Incorporated
• Inventors: Hillyard, Jason, Taylor, James Laurence
• Granted Patent: US 7,751,426 B2
• Time in Patent Office: Days
• US Class Current: 370/450
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements

Abstract

Establishing communication between a first device and a second device participating in a reservation based communication protocol over a communication network and sharing the reservation to allow for data to be transmitted from both devices during the reservation.

Claims

1. A method for establishing communication between a first device and a second device participating in a reservation based communication protocol over a wireless communication network, comprising:

acquiring a single reservation comprising a plurality of reserved slots within a superframe wherein at least some of the reserved slots are reservation blocks wherein the reservation blocks are contiguous reserved slots; and

sharing the reservation between the first device and the second device comprising;

establishing a default allocation of the reservation blocks between the first device and the second device wherein a portion of the reservation blocks are respectively allocated to each of the devices; and

transmitting information from each of the devices during at least a portion of the reservation blocks.

2. The method of claim 1 wherein the first device transmits a token frame to the second device to allow the second device to transmit data to the first device during a first reservation block.

3. The method of claim 1 wherein the first device transmits a token frame to the second device to initiate a transfer of data to the second device during a first reservation block, the token frame comprising an acknowledge request, and the first device transmitting a plurality of data frames to the second device during the first reservation block after receiving an acknowledge response frame from the second device.

4. The method of claim 1 further comprising:

transmitting a token frame from the first device during a first reservation block indicating that the first device has no further data to transmit to the second device during the first reservation block; and

subsequently transmitting data from the second device to the first device during the first reservation block.

5. The method of claim 1 further comprising:

transmitting a first token frame from the first device during a first reservation block indicating that the first device has no further data to transmit to the second device during the first reservation block; and

subsequently transmitting a second token frame from the first device during the first reservation block indicating that the first device has no further data to transmit to the second device during the first reservation block, wherein the second token frame comprises a retransmission of a transmission control notification of the first token frame.

6. The method of claim 1 wherein the default allocation comprises alternating allocations of a plurality of zones of the superframe, and the owner of the reservation receives the first zone, wherein the first zone comprises a plurality of reserved slots.

7. The method of claim 1 further comprising:

transmitting a reservation block allocation request from the first device to the second device requesting alternate allocations of the reservation blocks.

8. The method of claim 1 further comprising:

transmitting reservation block allocation requests from each of the first device and the second device indicating alternate allocations; and

resolving any transmission access contentions based on the default allocation.

9. The method of claim 1 further comprising:

transmitting a zone activity frame from the first device to the second device, wherein the zone activity frame indicates which zone reservation blocks the first device requests for transmitting data to the second device during a plurality of zones of the superframe, wherein a zone reservation block comprises a plurality of contiguous reserved slots within a zone, and the reservation comprises a plurality of zones.

10. The method of claim 1 further comprising:

transmitting a zone activity frame in a beacon frame from the first device to the second device, wherein the zone activity frame indicates which zone reservation blocks the first device requests for transmitting data to the second device during a plurality of zones of the superframe, wherein a zone reservation block comprises a plurality of contiguous reserved slots within a zone, and the reservation comprises a plurality of zones.

11. The method of claim 1 further comprising:

transmitting a zone activity frame in a token frame from the first device to the second device, wherein the zone activity frame indicates which zone reservation blocks the first device requests for transmitting data to the second device during a plurality of zones of the superframe, wherein a zone reservation block comprises a plurality of contiguous reserved slots within a zone, and the reservation comprises a plurality of zones.

12. The method of claim 1 further comprising:

transmitting a zone activity frame from the first device to the second device, wherein the zone activity frame indicates which zone reservation blocks the first device requests for transmitting data to the second device during a plurality of zones of the superframe, wherein a zone reservation block comprises a plurality of contiguous reserved slots within a zone, and the reservation comprises a plurality of zones; and

retransmitting the zone activity frame from the first device to the second device if a zone activity response frame is not received from the second device before an elapse of a timeout period.

13. The method of claim 1 further comprising:

transmitting a zone activity frame from the first device to the second device, wherein the zone activity frame comprises a first bit mask indicating which zone reservation blocks the first device requests for transmitting data to the second device during a plurality of zones of the superframe, wherein a zone reservation block comprises a plurality of contiguous reserved slots within a zone, and the reservation comprises a plurality of zones; and

transmitting a zone activity response frame from the second device to the first device, wherein the zone activity response frame comprises a second bit mask indicating which zone reservation blocks the second device requests for transmitting data to the first device during the plurality of zones of the superframe.

14. The method of claim 1 further comprising:

transmitting a zone activity frame from the first device to the second device, wherein the zone activity frame comprises a first bit mask indicating which zone reservation blocks the first device requests for transmitting data to the second device during a plurality of zones of the superframe, wherein a zone reservation block comprises a plurality of contiguous reserved slots within a zone, and the reservation comprises a plurality of zones;

transmitting a zone activity response frame from the second device to the first device, wherein the zone activity response frame comprises a second bit mask indicating which zone reservation blocks the second device requires for transmitting data to the first device during the plurality of zones of the superframe; and

resolving any transmission access contentions based on the default allocation to determine a new zone activity for the superframe, wherein the first device optionally powers down its radio for wireless data transmission during any zones for which no data needs to be transmitted based on the new zone activity for the superframe, and the second device optionally powers down its radio for wireless data transmission during any zones for which no data needs to be transmitted based on the new zone activity for the superframe.

15. The method of claim 1 further comprising:

transmitting a zone activity frame from the first device to the second device, wherein the zone activity frame comprises a first bit mask indicating which zone reservation blocks the first device requests for transmitting data to the second device during a plurality of zones of the superframe, wherein a zone reservation block comprises a plurality of contiguous reserved slots within a zone, and the reservation comprises a plurality of zones;

transmitting a zone activity response frame from the second device to the first device, wherein the zone activity response frame comprises a second bit mask indicating which zone reservation blocks the second device requires for transmitting data to the first device during the plurality of zones of the superframe; and

resolving any transmission access contentions based on the default allocation to determine a new zone activity for the superframe, wherein the new zone activity is persistent for subsequent superframes.

16. The method of claim 1 wherein a token frame is transmitted from the first device to the second device to indicate that the first device has no further data to send during a first reservation block, and wherein the first device powers down its radio for wireless data transmission if the second device responds to the token frame transmitted from the first device indicating that the first device has no further data to send by transmitting a token response frame indicating that the second device has no further data to send during the first reservation block.

17. The method of claim 1 wherein a token frame is transmitted from the first device to the second device to indicate that the first device has no further data to send during a first reservation block, and wherein the first device and the second device timeout their respective data transmission during a remainder of the first reservation block if the second device responds to the token frame sent from the first device indicating that the first device has no further data to send by transmitting a token response frame indicating that the second device has no further data to send during the first reservation block.

18. The method of claim 1 wherein the reservation comprises a single WiMedia reservation using a Bluetooth Private Reservation Protocol.

19. A system for establishing communication between a first device and a second device participating in a reservation based communication protocol over a wireless communication network, comprising:

a processor of the first device configured to acquire a single reservation comprising a plurality of reserved slots within a superframe wherein at least some of the reserved slots are reservation blocks wherein the reservation blocks are contiguous reserved slots; and

to share the reservation between the first device and the second device by establishing a default allocation of the reservation blocks between the first device and the second device wherein a portion of the reservation blocks are respectively allocated to each of the devices; and

for allowing for the transmission of information from each of the devices during at least a portion of the reservation blocks; and

a memory coupled to the processor and configured to provide the processor with instructions.

20. A computer program product for establishing communication between a first device and a second device participating in a reservation based communication protocol over a wireless communication network, the computer program product being embodied in a computer readable storage medium and comprising computer instructions for:

acquiring a single reservation comprising a plurality of reserved slots within a superframe wherein at least some of the reserved slots are reservation blocks wherein the reservation blocks are contiguous reserved slots; and

sharing the reservation between the first device and the second device comprising;

establishing a default allocation of the reservation blocks between the first device and the second device wherein a portion of the reservation blocks are respectively allocated to each of the devices; and

transmitting information from each of the devices during at least a portion of the reservation blocks.