Transmit power control via downlink control information
A method performed by a user equipment may comprise receiving first DCI of a first DCI format and receiving second DCI of a second DCI format which is different than the first DCI. The second DCI format may specify a variable number of TPC command bits and may include no less than 6 bits of TPC information. The second DCI format may be a variable length DCI format. A number of information bits of the second DCI may be less than or equal to a number of information bit of the first DCI. The second DCI may be scrambled with a SRS RNTI.
1 . A method performed by a user equipment (UE), the method comprising:
receiving first downlink control information (DCI) of a first DCI format;
receiving second DCI of a second DCI format, wherein the second DCI format is different than the first DCI format, wherein the second DCI format specifies a variable number of transmit power control (TPC) command bits, wherein the second DCI includes no less than 6 bits of TPC information;
receiving third DCI of a third DCI format which is different than the first DCI format and the second DCI format, wherein the third DCI format is a variable length DCI format, wherein the third DCI is scrambled according to a paging radio network temporary identifier (RNTI), wherein the third DCI includes information for a tracking reference signal; and
receiving subgroup information via a system information block (SIB) and processing the third DCI in accordance with the subgroup information;
wherein a number of information bits of the second DCI format is variable and a total number of information bits of the second DCI is less than or equal to a size of the first DCI format;
wherein the second DCI is scrambled with a sounding reference signal (SRS) RNTI;
wherein at least 4 bits of the second DCI are applicable to power control of the UE;
wherein the second DCI is received based on information of preceding DCI, wherein the preceding DCI specifies at least time and beam information corresponding to at least the second DCI.
2 . The method of claim 1 , wherein the third DCI is sent to a group of UEs;
wherein the SIB is provided to the UE by a relay node, wherein the subgroup information includes a number of subgroups.
3 . The method of claim 1 , wherein the third DCI includes a bitmap of paging information, wherein the length of the bitmap is determined via a relay node.
4 . A base station comprising:
a transmitter that:
transmits first downlink control information (DCI) of a first DCI format;
transmits second DCI of a second DCI format, wherein the second DCI format is different than the first DCI format, wherein the second DCI format specifies a variable number of transmit power control (TPC) command bits, wherein the second DCI includes no less than 6 bits of TPC information;
transmits third DCI of a third DCI format which is different than the first DCI format and the second DCI format, wherein the third DCI format is a variable length DCI format, wherein the third DCI is scrambled according to a paging radio network temporary identifier (RNTI), wherein the third DCI includes information for a tracking reference signal; and
transmits subgroup information for processing the third DCI, via a system information block (SIB);
wherein a number of information bits of the second DCI is less than or equal to a size of the first DCI format;
wherein the second DCI is scrambled with a sounding reference signal (SRS) RNTI;
wherein the base station processes DCI that specifies at least time and beam information corresponding to at least the second DCI, before transmitting the second DCI.