Power saving
A method, a base station and a system are provided. In the method, a base station transmits one or more radio resource control messages including a PS-RNTI for a PS mode and a DCI. Additionally, the base station transmits a message indicating that each bit of a dormancy indication bitmap corresponds to at least one cell of one or more secondary cells. Furthermore, the base station transmits, based on the PS-RNTI, a first DCI comprising a first dormancy indication bitmap, where a HARQ process number of the first DCI is set to a predefined value to enable the PS mode of a wireless device. Moreover, the base station transmits a second DCI indicating disabling the PS mode.
1 . A method, comprising:
transmitting, by a base station, one or more radio resource control messages comprising a power saving radio network temporary identifier (PS-RNTI) for a power saving (PS) mode and a downlink control information (DCI), wherein the DCI comprises a plurality of blocks and notifies power saving information;
transmitting, by the base station, a message indicating that each bit of a dormancy indication bitmap corresponds to at least one cell of one or more secondary cells;
transmitting, by the base station, based on the PS-RNTI, a first DCI comprising a first dormancy indication bitmap, wherein the message indicates a correspondence between a first bit of the first dormancy indication bitmap and at least one first cell of the one or more secondary cells; wherein a hybrid automatic repeat request (HARQ) process number of the first DCI is set to a predefined value to enable the PS mode of a wireless device;
transitioning, by the base station, the at least one first cell from a dormancy to a non-dormancy, based on the first bit having a first value;
transitioning, by the base station, at least one second cell, of the one or more secondary cells, from a non-dormancy to a dormancy, in response to:
the first dormancy indication bitmap comprising a second bit corresponding to the at least one second cell; and
the second bit having a second value different from the first value; and
transmitting, by the base station, a second DCI indicating disabling the PS mode.
2 . The method of claim 1 , wherein:
the dormancy of the at least one first cell is a power saving state of the at least one first cell; and
the non-dormancy of the at least one first cell is a non-power saving state of the at least one first cell.
3 . The method of claim 1 , further comprising:
receiving, by the base station, information indicating whether the power saving mode is supported or not by the wireless device.
4 . The method of claim 3 , wherein the information indicating whether the power saving mode is supported or not comprises at least one of following information: whether the wireless device supports a power saving mode in an RRC idle state, an RRC inactive state, or an RRC connected state.
5 . The method of claim 1 , wherein the second DCI is transmitted in a wake-up window, the wake-up window periodically occurs in a time domain according to one or more configuration parameters of the PS mode.
6 . The method of claim 1 , wherein the second DCI indicating disabling the PS mode based on at least one of following information: a first RNTI dedicated for the PS mode, or one or more fields of the second DCI.
7 . The method of claim 1 , wherein the message is a radio resource control message.
8 . The method of claim 1 , wherein the message comprises a primary cell configuration of a primary cell and one or more secondary cells configurations of the one or more secondary cells.
9 . The method of claim 1 , wherein a DCI format of the second DCI is different from a DCI format of the first DCI.
10 . The method of claim 1 , further comprising:
transmitting, by the base station, a third DCI comprising a second dormancy indication bitmap comprising the first bit; and
transitioning, by the base station, the at least one first cell from the non-dormancy to the dormancy based on the first bit having a second value different from the first value.
11 . A base station, comprising:
one or more processors; and a memory storing instructions that, when executed by the one or more processors, cause the base station to:
transmit one or more radio resource control messages comprising a power saving radio network temporary identifier (PS-RNTI) for a power saving (PS) mode, and a downlink control information (DCI), wherein the DCI comprises a plurality of blocks and notifies power saving information;
transmit a message indicating that each bit of a dormancy indication bitmap corresponds to at least one cell of one or more secondary cells;
transmit, based on the PS-RNTI, a first DCI comprising a first dormancy indication bitmap, wherein the message indicates a correspondence between a first bit of the first dormancy indication bitmap and at least one first cell of the one or more secondary cells; wherein a hybrid automatic repeat request (HARQ) process number of the first DCI is set to a predefined value to enable the PS mode of a wireless device;
transition the at least one first cell from a dormancy to a non-dormancy, based on the first bit having a first value;
transition at least one second cell, of the one or more secondary cells, from a non-dormancy to a dormancy, in response to:
the first dormancy indication bitmap comprising a second bit corresponding to the at least one second cell; and
the second bit having a second value different from the first value; and
transmit a second DCI indicating disabling the PS mode.
12 . The base station of claim 11 , wherein:
the dormancy of the at least one first cell is a power saving state of the at least one first cell; and
the non-dormancy of the at least one first cell is a non-power saving state of the at least one first cell.
13 . The base station of claim 11 , wherein the instructions further cause the base station to receive information indicating whether the power saving mode is supported or not by the wireless device.
14 . The base station of claim 13 , wherein information indicating whether the power saving mode is supported or not comprises at least one of following information: whether the wireless device supports a power saving mode in an RRC idle state, an RRC inactive state, or an RRC connected state.
15 . The base station of claim 11 , wherein the second DCI is transmitted in a wake-up window, the wake-up window periodically occurs in a time domain according to one or more configuration parameters of the PS mode.
16 . The base station of claim 11 , wherein the second DCI indicating disabling the PS mode based on at least one of following information: a first RNTI dedicated for the PS mode, or one or more fields of the second DCI.
17 . The base station of claim 11 , wherein the message is a radio resource control message.
18 . The base station of claim 11 , wherein the message comprises a primary cell configuration of a primary cell and one or more secondary cells configurations of the one or more secondary cells.
19 . The base station of claim 11 , wherein the instructions further cause the base station to:
transmit a third DCI comprising a second dormancy indication bitmap comprising the first bit; and
transition the at least one first cell from the non-dormancy to the dormancy based on the first bit having a second value different from the first value.
20 . A system, comprising:
a base station comprising:
one or more processors and a memory storing instructions that, when executed by the one or more processors, cause the base station to:
transmit, to a wireless device, one or more radio resource control messages comprising a power saving radio network temporary identifier (PS-RNTI) for a power saving (PS) mode, and a downlink control information (DCI), wherein the DCI comprises a plurality of blocks and notifies power saving information;
transmit, to the wireless device, a message indicating that each bit of a dormancy indication bitmap corresponds to at least one cell of one or more secondary cells;
transmit, based on the PS-RNTI, a first DCI comprising a first dormancy indication bitmap, wherein the message indicates a correspondence between a first bit of the first dormancy indication bitmap and at least one first cell of the one or more secondary cells; wherein a hybrid automatic repeat request (HARQ) process number of the first DCI being is set to a predefined value to enable the PS mode of a wireless device;
transition the at least one first cell from a dormancy to a non-dormancy, based on the first bit having a first value;
transmit a second DCI indicating disabling the PS mode; and
the wireless device comprising one or more processors and a memory storing instructions that, when executed by the one or more processors, cause the wireless device to:
receive the one or more radio resource control messages comprising the PS-RNTI;
receive the message;
receive, based on the PS-RNTI, the first DCI;
determine the first DCI for indicating the PS mode based on the HARQ process number of the first DCI being set to the predefined value;
in response to determining the first DCI for indicating the PS mode, enable the PS mode;
transition the at least one first cell from a dormancy to a non-dormancy, based on the first bit having a first value;
transition at least one second cell, of the one or more secondary cells, from a non-dormancy to a dormancy, in response to:
the first dormancy indication bitmap comprising the second bit corresponding to the at least one second cell; and
the second bit having the second value different from the first value;
receive the second DCI indicating disabling the PS mode; and
in response to one or more fields of the second DCI being set to a predetermined value, switch from the PS mode to a normal access mode.