Reducing scheduling requests by a wireless communication device transmitting voice data over dynamically scheduled resources

• US 9,591,661 B2
• Filed: 11/08/2013
• Issued: 03/07/2017
• Est. Priority Date: 11/09/2012
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Apple Inc.
• Inventors: Kodali, Sree Ram, Makharia, Shivesh
• Primary Examiner(s): Goddard, Tammy Paige
• Assistant Examiner(s): Bataille, Frantz
• Application Number:
  US14/076,100
• Publication Number:
  US 20140135027A1
• Time in Patent Office: 1,215 Days
• US Class Current: 1/1
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management

Abstract

A method for reducing scheduling requests by a wireless communication device transmitting data using dynamically scheduled resources over a logical channel is provided. The method includes receiving, at the wireless communication device, a configuration from a network entity that sets a LogicalChannelSR-Mask for a logical channel for which uplink resources can be dynamically scheduled by the wireless network. The method further includes waiting to send a scheduling request (SR) for a delay time period when data is available to be sent on the logical channel and uplink resources have not been granted. The method additionally includes using the grant to send the data without sending an SR when a grant is received within the delay time period; or sending an SR when a grant is not received within the delay time period. In another method, a network selectively enables or disables SRs for a logical channel through explicit signaling.

Claims

1. A method to reduce scheduling requests sent to a wireless network by a wireless communication device when configured by the wireless network to use dynamically scheduled resources for a logical channel, the method comprising:

by the wireless communication device;

sending data to the wireless network over the logical channel using uplink radio resources assigned in grants provided by the wireless network without sending scheduling requests to the wireless network for the logical channel, when transmission of scheduling requests for the logical channel by the wireless communication device to the wireless network is disabled by the wireless network;

receiving from the wireless network a first signaling message that enables transmission of scheduling requests for the logical channel, wherein the first signaling message is different than a resource message containing information that specifies a resource grant to the wireless communication device;

sending to the wireless network at least one scheduling request that requests uplink radio resources for sending additional data to the wireless network, after receiving the first signaling message;

receiving from the wireless network a second signaling message that disables transmission of scheduling requests for the logical channel; and

resuming sending data to the wireless network over the logical channel using uplink radio resources assigned in grants provided by the wireless network without sending to the wireless network scheduling requests for the logical channel, while transmission of scheduling requests for the logical channel is disabled.

2. The method as recited in claim 1, wherein a logical channel scheduling request mask (LogicalChannelSR-Mask) for the logical channel is set to provide for enabling and disabling transmission of scheduling requests for the logical channel.

3. The method as recited in claim 1, wherein the wireless network operates in accordance with a Long Term Evolution (LTE) wireless communication protocol, and wherein the logical channel supports communication for a voice over LTE (VoLTE) connection.

4. The method as recited in claim 1, wherein the first and second signaling messages include a first field that indicates enabling or disabling transmission of scheduling requests for the logical channel and a second field that identifies the logical channel.

5. The method as recited in claim 1, wherein the first and second signaling messages include a field that indicates enabling or disabling transmission of scheduling requests for all logical channels of the wireless communication device for which a logical channel scheduling request mask (LogicalChannelSR-Mask) is set.

6. The method as recited in claim 1, wherein the wireless communication device receives, during a gap in transmission of data in an uplink direction, the first signaling message that enables transmission of scheduling requests.

7. The method as recited in claim 6, wherein the gap in transmission of data in the uplink direction corresponds to a pause in a voice communication by a user of the wireless communication device.

8. A method to reduce scheduling requests sent by a wireless communication device to a wireless network over a connection that uses dynamically scheduled resources, the method comprising:

by a base station of the wireless network;

dynamically scheduling uplink radio resources for the wireless communication device to enable the wireless communication device to send data over a logical channel;

sending at least one resource grant to the wireless communication device to transmit data over the logical channel to the wireless network without requiring the wireless communication device to send scheduling requests to receive the at least one resource grant to transmit data over the logical channel when transmission of scheduling requests for the logical channel by the wireless communication device to the wireless network is disabled;

receiving data sent by the wireless communication device over the logical channel using uplink radio resources assigned in the at least one resource grant;

detecting a gap in data transmission sent by the wireless communication device over the logical channel;

sending to the wireless communication device a first signaling message that enables transmission of scheduling requests for the logical channel in response to detecting the gap in data transmission, wherein the first signaling message is different than a resource message containing information that specifies a resource grant to the wireless communication device;

receiving from the wireless communication device a scheduling request that requests uplink radio resources to send data over the logical channel; and

sending to the wireless communication device a second signaling message that disables transmission of scheduling requests for the logical channel in response to resumption of transmission of data over the logical channel by the wireless communication device.

9. The method as recited in claim 8, wherein a logical channel scheduling request mask (LogicalChannelSR-Mask) for the logical channel is set to provide for enabling and disabling transmission of scheduling requests for the logical channel.

10. The method as recited in claim 8, wherein the wireless network operates in accordance with a Long Term Evolution (LTE) wireless communication protocol, and wherein the logical channel supports communication for a voice over LTE (VoLTE) connection.

11. The method as recited in claim 8, wherein the first and second signaling messages include a first field that indicates enabling or disabling transmission of scheduling requests for the logical channel and a second field that identifies the logical channel.

12. The method as recited in claim 8, wherein the first and second signaling messages include a field that indicates enabling or disabling transmission of scheduling requests for all logical channels of the wireless communication device for which a logical channel scheduling request mask (LogicalChannelSR-Mask) is set.

13. A method to reduce scheduling requests sent to a wireless network by a wireless communication device configured to transmit data over dynamically scheduled resources, the method comprising:

by the wireless communication device;

receiving from the wireless network a first signaling message that includes a configuration to set a logical channel scheduling request mask (LogicalChannelSR-Mask) that provides for enabling and disabling transmission of scheduling requests for a logical channel;

delaying transmission of a scheduling request to the wireless network for a delay time period in an instance in which data is available to be sent on the logical channel and uplink radio resources on which to send the data have not been granted by the wireless network, wherein the delay time period is based on a periodicity for scheduling grants by the wireless network for semi-persistent scheduling (SPS), and wherein the delay time period is longer than a time period used for voice packet transmission;

in an instance in which a grant is received from the wireless network within the delay time period, utilizing the grant to send at least a portion of the data to the wireless network; and

in an instance in which a grant is not received from the wireless network within the delay time period, sending a scheduling request to the wireless network to request uplink radio resources on which to send the data to the wireless network over the logical channel.

14. The method as recited in claim 13, further comprising:

receiving from the wireless network a second signaling message that includes a value for the delay time period.

15. The method as recited in claim 13, wherein the first signaling message includes a first field that indicates enabling or disabling transmission of scheduling requests for the logical channel and a second field that identifies the logical channel.

16. The method as recited in claim 13, wherein the first signaling message includes a field that indicates enabling or disabling transmission of scheduling requests for all logical channels of the wireless communication device for which a logical channel scheduling request mask (LogicalChannelSR-Mask) is set.

17. The method as recited in claim 13, wherein the wireless network operates in accordance with a Long Term Evolution (LTE) wireless communication protocol, and the logical channel supports communication for a voice over LTE (VoLTE) connection.

18. The method as recited in claim 13, further comprising initiating a random access channel (RACH) procedure when no grant is received from the wireless network within the delay time period and the logical channel is not configured for dynamic scheduling requests.

19. The method as recited in claim 14, wherein the value for the delay time period equals or exceeds an expected or actual inter-arrival time between successive data packets for a voice connection.

20. The method as recited in claim 19, wherein the logical channel is not configured for semi-persistent scheduling (SPS) by the wireless network.