Method for controlling a data stream in a wireless network

• US 7,088,702 B2
• Filed: 10/08/2003
• Issued: 08/08/2006
• Est. Priority Date: 10/03/2001
• Status: Expired due to Fees

• Current Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Original Assignee: Freescale Semiconductor, Inc. (NXP Semiconductors NV)
• Inventors: Shvodian, William M.
• Primary Examiner(s): Nguyen, Duc
• Assistant Examiner(s): Vu, Michael T.
• Application Number:
  US10/680,489
• Publication Number:
  US 20040072573A1
• Time in Patent Office: 1,035 Days
• Field of Search: 455/423, 455/434, 455/450, 455/422, 370/348, 370/347, 370/442, 370/443, 370/328, 370/337, 709/249, 709/226
• US Class Current: 370/348
• CPC Class Codes: H04L 61/00 Network arrangements, protocols or services for addressing or naming
• CPC Class Codes: H04L 61/10 of different types
• CPC Class Codes: H04L 69/324 in the data link layer [OSI layer 2], e.g. HDLC
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks

Abstract

A method is provided for transmitting data packets from a source device in a wireless network. The source device receives a channel time allocation identifying the source device as assigned to transmit and a destination device as assigned to listen during the channel time allocation. If the source device has any primary data to send to the destination device, it will do so during the channel time allocation. If time remains in the channel time allocation once the primary data (if any) has been sent to the destination device, the source device will determine whether it has any secondary data to send to a secondary device. If so, the source device will determine whether the secondary device will be listening during the channel time allocation. If the secondary device will be listening, the source device then sends the secondary data to the secondary device during the channel time allocation.

Claims

1. A method of transmitting data packets from a source device in a wireless network, comprising:

receiving a channel time allocation assignment at the source device, the channel time allocation assignment indicating;

an assigned channel time allocation, a source address indicating that the source device is assigned to transmit dining the assigned channel time allocation, and a destination address indicating that a destination device is assigned to listen during the assigned channel time allocation;

performing a first determining step to determine whether the source device has primary data to send to the destination device;

sending primary data from the source device to the destination device during the assigned channel time allocation if the first determining step determines that the source device does have primary data to send;

performing a second determining step to determine whether any time remains in the assigned channel time allocation after the step of sending primary data;

performing a third determining step to determine whether the source device has secondary data to send to a secondary device not assigned as the destination device if the second determining step determines that time remains in the assigned channel time allocation;

performing a fourth determining step to determine whether the secondary device is listening during the assigned channel time allocation if the third determining step determines that the source device has secondary data to send to the secondary device; and

sending secondary data from the source device to the secondary device during the assigned channel time allocation if the fourth determining step determines that the source device does have secondary data to send.

2. A method of transmitting data packets from a source device in a wireless network, as recited in claim 1, further comprising:

performing a fifth determining step to determine whether any time remains in the assigned channel time allocation after the step of sending secondary data; and

repeating the second, third, and fourth determining steps as well as the step of sending secondary data if the fifth determining step determines that time remains in the assigned channel time allocation.

3. A method of transmitting data packets from a source device in a wireless network, as recited in claim 1,

wherein the source device maintains a device listening mode list of all network device, the device listening mode list indicating a listening mode that each network device is currently operating in, and

wherein the third determining step is performed by having the source device look up the secondary device in the device listening mode list.

4. A method of transmitting data packets from a source device in a wireless network, as recited in claim 3, wherein the listening modes include a listen-to-all mode indicating a policy of listening to all possible channel time allocations regardless of their assigned destination address.

5. A method of transmitting data packets from a source device in a wireless network, as recited in claim 3, wherein the listening modes include a listen-to-multicast mode indicating a policy of listening to all possible channel time allocations that are assigned to a multicast address as the destination address.

6. A method of transmitting data packets from a source device in a wireless network, as recited in claim 3, wherein the listening modes include a listen-to-source mode indicating a policy of listening to all possible channel time allocations that are assigned to a set unicast address as the destination address.

7. A method of transmitting data packets from a source device in a wireless network, comprising:

receiving a channel time allocation assignment at the source device, the channel time allocation assignment indicating;

an assigned channel time allocation, a source address indicating that the source device is assigned to transmit during the assigned channel time allocation, and a destination address indicating that a destination device is assigned to listen during the assigned channel time allocation;

performing a first determining step to determine whether the source device has primary data to send to the destination device;

sending primary data from the source device to the destination device during the assigned channel time allocation if the first determining step determines that the source device does have primary data to send;

performing a second determining step to determine whether any time remains in the assigned channel time allocation after the step of sending primary data;

performing a third determining step to determine which non-destination devices are listening during the assigned channel time allocation if the second determining step determines that time remains in the assigned channel time allocation;

performing a fourth determining step to determine whether the source device has secondary data to send to a secondary device if the third determining step determines that at least one of the non-destination devices will be listening during the assigned channel time allocation, the secondary device being one of the non-destination devices that will be listening during the assigned channel time allocation; and

sending secondary data from the source device to the secondary device during the assigned channel time allocation if the fourth determining step determines that the source device does have secondary data to send.

8. A method of transmitting data packets from a source device in a wireless network, as recited in claim 7, further comprising:

performing a fifth determining step to determine whether any time remains in the assigned channel time allocation alter the step of sending secondary data; and

repeating the second, third, and fourth determining steps as well as the step of sending secondary data if the fifth determining step determines that time remains in the assigned channel time allocation.

9. A method of transmitting data packets from a source device in a wireless network, as recited in claim 7,

wherein the source device maintains a device listening mode list of all network devices, the device listening mode indicating a listening mode that each device is currently operating in, and

wherein the third determining step is performed by having the source device look up the secondary device in the device listening mode list.

10. A method of transmitting data packets from a source device in a wireless network, as recited in claim 9, wherein the listening modes include a listen-to-all mode indicating a policy of listening to all possible channel time allocations regardless of their assigned destination address.

11. A method of transmitting data packets from a source device in a wireless network, as recited in claim 9, wherein the listening modes include a listen-to-multicast mode indicating a policy of listening to all possible channel time allocations that are assigned to a multicast address as the destination address.

12. A method of transmitting data packets from a source device in a wireless network, as recited in claim 9, wherein the listening modes include a listen-to-source mode indicating a policy of listening to all possible channel time allocations that are assigned to a set unicast address as the destination address.