Control indicator for power saving in a mobile wireless communication device
A wireless communication device (UE) may receive control indicator information (CII) indicating whether one or more candidate physical control channels (PCCs) are available to the UE for decoding. The UE may perform respective blind decoding if the CII indicates that the one or more candidate PCCs are available, to decode a respective PCC intended for the UE. The UE may receive the CII in the same slot in which PCCs are transmitted, or it may receive the CII in another slot, which may be a narrowband slot. The UE may receive the PCCs in the same slot in which corresponding physical data channels (PDCs) are transmitted, or it may receive the PCCs in another slot, e.g. a slot immediately preceding the slot in which the corresponding PDCs are transmitted. By eliminating unnecessary blind decoding and receiving the CII over narrowband, power consumption of the UE may be greatly reduced.
1. An apparatus comprising:
a processing element configured to cause a wireless communication device to:
conduct wireless communications over a network;
receive, as part of the wireless communications, control indicator information indicating whether a respective physical control channel intended for the wireless communication device is present among one or more candidate physical control channels available to the wireless communication device for decoding;
perform a respective blind decoding of the one or more candidate physical control channels if the control indicator information indicates that the respective physical control channel is present, to detect the respective physical control channel; and
do not perform the blind decoding of the one or more candidate physical control channels if the control indicator information indicates an absence of the respective physical control channel.
2. The apparatus of claim 1 , wherein the processing element is configured to cause the wireless communication device to receive the control indicator information in one of:
a slot other than a corresponding slot in which physical control channels are transmitted; or
a same slot in which the physical control channels are transmitted.
3. The apparatus of claim 1 , wherein the processing element is configured to cause the wireless communication device to decode a respective physical data channel corresponding to the detected respective physical control channel, in response to detecting the respective physical control channel.
4. The apparatus of claim 3 , wherein the processing element is configured to cause the wireless communication device to receive the respective physical control channel in one of:
a slot other than a corresponding slot in which corresponding physical data channels are transmitted; or
a same slot in which the corresponding physical data channels are transmitted.
5. The apparatus of claim 1 , wherein the wireless communication device is part of a specified group of wireless communication devices, wherein the control indicator information applies to all wireless communication devices in the specified group.
6. The apparatus of claim 1 , wherein the processing element is configured to cause the wireless communication device to receive the control indicator information over one of:
a channel that also includes other information; or
a channel dedicated to carrying the control indicator information.
7. The apparatus of claim 6 , wherein the processing element is configured to cause the wireless communication device to receive the channel dedicated to carrying the control indicator information over narrowband.
8. A wireless communication device comprising:
radio circuitry configured to facilitate wireless communications of the wireless communication device over a network; and
a processing element communicatively coupled to the radio circuitry and configured to cause the wireless communication device to:
receive, as part of the wireless communications, control indicator information indicating whether a respective physical control channel intended for the wireless communication device is present among one or more candidate physical control channels available to the wireless communication device for decoding;
perform a respective blind decoding of the one or more candidate physical control channels if the control indicator information indicates that the respective physical control channel is present, to detect the respective physical control channel; and
do not perform the blind decoding of the one or more candidate physical control channels if the control indicator information indicates an absence of the respective physical control channel.
9. The wireless communication device of claim 8 , wherein the processing element is configured to further cause the wireless communication device to receive the control indicator information in one of:
a different slot than a corresponding slot in which physical control channels are transmitted; or
a same slot in which the physical control channels are transmitted.
10. The wireless communication device of claim 8 , wherein the processing element is configured to further cause the wireless communication device to decode a respective physical data channel corresponding to the detected respective physical control channel, in response to detecting the respective physical control channel.
11. The wireless communication device of claim 10 , wherein the processing element is configured to further cause the wireless communication device to receive the respective physical control channel in one of:
a slot other than a corresponding slot in which corresponding physical data channels are transmitted; or
a same slot in which the corresponding physical data channels are transmitted.
12. The apparatus of claim 8 , wherein the wireless communication device is part of a specified group of wireless communication devices, wherein the control indicator information applies to all wireless communication devices in the specified group.
13. The wireless communication device of claim 8 , wherein the processing element is configured to further cause the wireless communication device to receive the control indicator information over one of:
a channel that also includes other information; or
a channel dedicated to carrying the control indicator information.
14. The wireless communication device of claim 13 , wherein the processing element is configured to further cause the wireless communication device to receive the channel dedicated to carrying the control indicator information over narrowband.
15. A non-transitory memory element storing programming instructions executable by a processing element to cause a wireless communications device to:
conduct wireless communications over a network;
receive, as part of the wireless communications, control indicator information indicating whether a respective physical control channel intended for the wireless communication device is present among one or more candidate physical control channels available to the wireless communication device for decoding;
perform a respective blind decoding of the one or more candidate physical control channels if the control indicator information indicates that the respective physical control channel is present, to detect the respective physical control channel; and
do not perform the blind decoding of the one or more candidate physical control channels if the control indicator information indicates an absence of the respective physical control channel.
16. The non-transitory memory element of claim 15 , wherein the programming instructions are executable by the processing element to further cause the wireless communication device to receive the control indicator information in one of:
a slot other than a corresponding slot in which physical control channels are transmitted; or
a same slot in which the physical control channels are transmitted.
17. The non-transitory memory element of claim 15 , wherein the programming instructions are executable by the processing element to further cause the wireless communication device to decode a respective physical data channel corresponding to the detected respective physical control channel, in response to detecting the respective physical control channel.
18. The non-transitory memory element of claim 17 , wherein the programming instructions are executable by the processing element to further cause the wireless communication device to receive the respective physical control channel in one of:
a slot other than a corresponding slot in which corresponding physical data channels are transmitted; or
a same slot in which the corresponding physical data channels are transmitted.
19. The non-transitory memory element of claim 15 , wherein the wireless communication device is part of a specified group of wireless communication devices, wherein the control indicator information applies to all wireless communication devices in the specified group.
20. The non-transitory memory element of claim 15 , wherein the programming instructions are executable by the processing element to further cause the wireless communication device to receive the control indicator information over one of:
a channel that also includes other information; or
a narrowband channel dedicated to carrying the control indicator information.