Managing transmitter collisions

Patent metadata

Field	Value
Publication number	US-10027359-B2
Application number	US-201514808035-A
Country	US
Kind code	B2
Filing date	Jul 24, 2015
Priority date	Aug 13, 2014
Publication date	Jul 17, 2018
Grant date	Jul 17, 2018

Abstract

Various embodiments implemented on a mobile communication device (e.g., a multi-SIM-multi-active communication device) mitigate degraded transmit performance typically experienced by a lower-priority subscription during a Tx collision event in which a higher-priority subscription receives a shared Tx resource of the mobile communication device to the exclusion of the lower-priority subscription. Specifically, in various embodiments, a processor of the mobile communication device may determine when an upcoming transmission of the lower-priority subscription will collide with a scheduled transmission of the higher-priority subscription (i.e., may determine when a Tx collision event will occur between the subscriptions) and may implement one or more Tx collision management strategies in response to determining that the lower-priority subscription's upcoming transmission will collide with a transmission of the higher-priority subscription, thus improving the lower-priority subscription's overall performance.

First claim

What is claimed is:

1. A method implemented by a mobile communication device for managing potential transmitter collisions of a first subscription, comprising:
receiving a first uplink grant for the first subscription;
determining a first time at which a first packet transmission of the first subscription is scheduled to occur based on the first uplink grant;
determining a first transmission schedule of a second subscription during the first time;
determining whether the first packet transmission will collide with a transmission of the second subscription based on the first transmission schedule of the second subscription;
implementing a transmit (Tx) collision management strategy for the first subscription in response to determining that the first packet transmission of the first subscription will collide with the transmission of the second subscription, wherein implementing the transmit (Tx) collision management strategy comprises:
determining whether a high-priority message of the first subscription comprising information sent to a network of the first subscription to maintain a performance level of the first subscription is scheduled to be transmitted as part of the first packet transmission; and
preventing transmission of the high-priority message of the first subscription as part of the first packet transmission in response to determining that the high-priority message of the first subscription is scheduled to be transmitted as part of the first packet transmission;

receiving a second uplink grant;
determining a second time at which a second packet transmission of the first subscription is scheduled to occur based on the second uplink grant;
determining a second transmission schedule of the second subscription during the second time;
determining whether the second packet transmission will collide with the transmission of the second subscription based on the second transmission schedule of the second subscription;
determining whether a threshold number of rescheduled high-priority messages has been reached in response to determining that the second packet transmission will collide with the transmission of the second subscription; and
attempting to send the high-priority message as part of the second packet transmission based on the second uplink grant in response to determining that the threshold number of rescheduled high-priority messages has been reached.

2. The method of claim 1 , wherein the first subscription and the second subscription are subscriptions to different radio access technologies.

3. The method of claim 1 , further comprising sending the first packet transmission to a network of the first subscription in response to determining that the first packet transmission will not collide with the transmission of the second subscription.

4. The method of claim 1 , further comprising attempting to send a low-priority message in the first packet transmission to a network of the first subscription in response to determining that no high-priority message is scheduled to be transmitted as part of the first packet transmission.

5. The method of claim 4 , wherein the low-priority message comprises information sent to the network of the first subscription that is not necessary to maintain a performance level of the first subscription.

6. The method of claim 1 , further comprising:
receiving a retransmission of the first uplink grant; and
attempting to transmit the high-priority message as part of a packet retransmission based on the retransmission of the first uplink grant.

7. The method of claim 1 , further comprising sending the high-priority message as part of the second packet transmission based on the second uplink grant in response to determining that the second packet transmission will not collide with the transmission of the second subscription.

8. The method of claim 1 , wherein the information represents one or more measurements, commands, or requests.

9. The method of claim 8 , wherein the first subscription is engaged in a data call and the second subscription is engaged in a voice call.

10. A method implemented by a mobile communication device for managing potential transmitter collisions of a first subscription, comprising:
receiving a first uplink grant for the first subscription;
determining a first time at which a first packet transmission of the first subscription is scheduled to occur based on the first uplink grant;
determining a first transmission schedule of a second subscription during the first time;
determining whether the first packet transmission will collide with a transmission of the second subscription based on the first transmission schedule of the second subscription;
implementing a transmit (Tx) collision management strategy for the first subscription in response to determining that the first packet transmission of the first subscription will collide with the transmission of the second subscription, wherein implementing the transmit (Tx) collision management strategy comprises:
determining whether a high-priority message of the first subscription comprising information sent to a network of the first subscription to maintain a performance level of the first subscription is scheduled to be transmitted as part of the first packet transmission; and
preventing transmission of the high-priority message of the first subscription as part of the first packet transmission in response to determining that the high-priority message of the first subscription is scheduled to be transmitted as part of the first packet transmission;

receiving a second uplink grant;
determining a second time at which a second packet transmission of the first subscription is scheduled to occur based on the second uplink grant;
determining a second transmission schedule of the second subscription during the second time;
determining whether the second packet transmission will collide with the transmission of the second subscription based on the second transmission schedule of the second subscription;
determining whether a threshold amount of time has elapsed since a first attempt to send the high-priority message; and
attempting to send the high-priority message as part of the second packet transmission based on the second uplink grant in response to determining that the threshold amount of time has elapsed since the first attempt to send the high-priority message.

11. The method of claim 10 , wherein the first subscription and the second subscription are subscriptions to different radio access technologies.

12. The method of claim 10 , further comprising sending the first packet transmission to a network of the first subscription in response to determining that the first packet transmission will not collide with the transmission of the second subscription.

13. The method of claim 10 , further comprising attempting to send a low-priority message in the first packet transmission to a network of the first subscription in response to determining that no high-priority message is scheduled to be transmitted as part of the first packet transmission.

14. The method of claim 13 , wherein the low-priority message comprises information sent to the network of the first subscription that is not necessary to maintain a performance level of the first subscription.

15. The method of claim 10 , further comprising:
receiving a retransmission of the first uplink grant; and
attempting to transmit the high-priority message as part of a packet retransmission based on the retransmission of the first uplink grant.

16. The method of claim 10 , further comprising sending the high-prior

Assignees

• Qualcomm Inc

Inventors

• Krishnamoorthi Deepak
• Kanamarlapudi Sitaramanjaneyulu

Classifications

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04W72/566

  of the information or information source or recipient · CPC title

• H04W72/56

  based on priority criteria · CPC title

• H04W74/0841

  with collision treatment · CPC title

• H04L1/188

  Time-out mechanisms · CPC title