Protecting uplink transmissions in coexisting wireless networks

• US 8,224,378 B2
• Filed: 10/07/2009
• Issued: 07/17/2012
• Est. Priority Date: 10/15/2008
• Status: Active Grant

• Current Assignee: Texas Instruments, Inc.
• Original Assignee: Texas Instruments, Inc.
• Inventors: Sun, Yanjun, Xhafa, Ariton E., Lu, Xiaolin
• Primary Examiner(s): HANNON, CHRISTIAN A
• Application Number:
  US12/574,904
• Publication Number:
  US 20100093392A1
• Time in Patent Office: 1,014 Days
• Field of Search: 455/455, 455450-451, 4554521-4522, 455/453, 455501-502, 455/527, 455/63.1, 455 412- 413, 4554521-4522, 455 412- 413, 455/553.1, 370/437, 370/447, 370/448
• US Class Current: 455/553.1
• CPC Class Codes: H04W 72/1215 for collaboration of different radio technologies
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

A system and method for protecting a wireless device including co-located network transceivers from uplink starvation are disclosed herein. A wireless device includes a first wireless transceiver and a second wireless transceiver respectively configured for communication via a first wireless network and a second wireless network. The wireless device further includes logic that determines which of the first and second transceivers is enabled to transmit at a given time. The logic determines a duration of a pending transmission via the first transceiver, and determines a predicted start time of a predicted transmission via the second transceiver. Based on the duration and the predicted start time, the logic transmits a notification signal indicating that a receiving device should refrain from transmitting on the first network for a reserved time ending after the pending transmission starts. The pending transmission starts following completion of the predicted transmission.

Claims

1. A wireless device, comprising:

a first wireless transceiver and a second wireless transceiver, the first transceiver configured for operation with a first wireless network, and the second transceiver configured for operation with a second wireless network; and

logic that determines which of the first and second transceivers is enabled to transmit at a given time;

wherein the logic is configured to select between reserving a time interval for use by the first transceiver and surrendering the time interval for transmissions by other devices on the first network, the selecting based on whether a pending transaction via the first transceiver can be completed prior to a predicted start time of a predicted transaction via the second transceiver and a comparison of a measure of total prior reserved time to a measure of total prior surrendered time; and

wherein the logic selects to reserve the time interval for use by the first transceiver based on being unable to complete the pending transmission prior to the predicted start time and a comparison of the measure of total prior surrendered time to the measure of total prior reserved time.

2. The wireless device of claim 1, wherein the logic transmits, via the first transceiver, a notification signal indicating that a receiving device should refrain from transmitting on the first network for a reserved time, the reserved time ending after the wireless device commences the pending transaction via the first transceiver, the commencing being after completion of the predicted transaction.

3. The wireless device of claim 1, wherein the logic is configured to balance time reserved for use by the first transceiver and time surrendered for use by other wireless devices on the first network.

4. The wireless device of claim 1, wherein the logic selects to reserve the time interval based on the measure of total prior surrendered time exceeding the measure of total prior reserved time by a predetermined amount.

5. The wireless device of claim 1, wherein the measure of total prior surrendered times comprises a count of a number of times a channel has been surrendered for use by other devices, and the measure of total prior reserved time comprises a count of number of times the channel has been reserved for use by the first transceiver.