Method and device for allocating identifiers to user equipment in cellular system
A method of receiving a control channel at a user equipment (UE) in a wireless mobile communication system is disclosed. This method comprises receiving a common control channel transferred from a base station. In this case, a first user equipment (UE) ID allocated to the UE is represented by ‘x’ bits, and a second UE ID allocated to another UE receiving a dedicated control channel transferred from the base station is represented by ‘y’ bits (where x<y).
1. A method of receiving control information at a user equipment (UE) in a wireless mobile communication system, the method comprising:
receiving, at the UE, the control information on a control channel transferred from a base station, wherein,
when the control channel is a common control channel, a UE ID (identifier) of the UE is represented by ‘x’ bits,
else when the control channel is a dedicated control channel, the UE ID of the UE is represented by ‘y’ bits, and
‘x’<‘y’ is satisfied.
2. The method according to claim 1 , wherein a ratio of a code rate of the common control channel to a code rate of the dedicated control channel is determined based on a ratio of ‘x’ to ‘y’.
3. The method according to claim 1 , wherein the UE ID is masked on a cyclic redundancy check (CRC) of the control channel, and when the control channel is the common control channel, a CRC length ‘z’ of the control channel is equal to or greater than ‘x’ and less than ‘y’.
4. The method according to claim 1 , wherein the UE ID is masked on a cyclic redundancy check (CRC) of the control channel, and when the control channel is the dedicated control channel, a CRC length of the control channel is equal to or greater than ‘y’.
5. The method according to claim 1 , wherein the control channel is a PDCCH (Physical Downlink Control Channel).
6. A method of transmitting control information in a wireless mobile communication system, the method comprising:
transmitting, at a base station, the control information on a control channel to a user equipment (UE),
wherein, when the control channel is a common control channel, a UE ID (identifier) of the UE is represented by ‘x’ bits,
else when the control channel is a dedicated control channel, the UE ID of the UE is represented by ‘y’ bits, and
‘x’<‘y’ is satisfied.
7. The method according to claim 6 , wherein a ratio of a code rate of the common control channel to a code rate of the dedicated control channel is determined based on a ratio of ‘x’ to ‘y’.
8. The method according to claim 6 , wherein the UE ID is masked on a cyclic redundancy check (CRC) of the control channel, and when the control channel is the common control channel, a CRC length ‘z’ of the control channel is equal to or greater than ‘x’ and less than ‘y’.
9. The method according to claim 6 , wherein the UE ID is masked on a cyclic redundancy check (CRC) of the control channel, and when the control channel is the dedicated control channel, a CRC length of the control channel is equal to or greater than ‘y’.
10. The method according to claim 6 , wherein the control channel is a PDCCH (Physical Downlink Control Channel).
11. A user equipment (UE) for a wireless mobile communication system, the user equipment (UE) comprising:
a radio frequency (RF) unit; and
a processor electrically connected to the RF unit,
wherein the processor is configured to receive control information on a control channel transferred from a base station through the RF unit,
when the control channel is a common control channel, a UE ID (identifier) of the UE is represented by ‘x’ bits,
else when the control channel is a dedicated control channel, the UE ID of the UE is represented by ‘y’ bits, and
‘x’<‘y’ is satisfied.
12. The user equipment according to claim 11 , wherein a ratio of a code rate of the common control channel to a code rate of the dedicated control channel is determined based on a ratio of ‘x’ to ‘y’.
13. The user equipment according to claim 11 , wherein the UE ID is masked on a cyclic redundancy check (CRC) of the control channel, and when the control channel is the common control channel, a CRC length ‘z’ of the control channel is equal to or greater than ‘x’ and less than ‘y’.
14. The user equipment according to claim 11 , wherein the UE ID is masked on a cyclic redundancy check (CRC) of the control channel, and when the control channel is the dedicated control channel, a CRC length of the control channel is equal to or greater than ‘y’.
15. The user equipment according to claim 11 , wherein the control channel is a PDCCH (Physical Downlink Control Channel).
16. A base station for a wireless mobile communication system, the base station comprising:
a radio frequency (RF) unit; and
a processor electrically connected to the RF unit,
wherein the processor is configured to transmit control information on a control channel to a user equipment (UE) through the RF unit,
when the control channel is a common control channel, a UE ID (identifier) of the UE is represented by ‘x’ bits,
else when the control channel is a dedicated control channel, the UE ID of the UE is represented by ‘y’ bits, and
‘x’<‘y’ is satisfied.
17. The base station according to claim 16 , wherein a ratio of a code rate of the common control channel to a code rate of the dedicated control channel is determined based on a ratio of ‘x’ to ‘y’.
18. The base station according to claim 16 , wherein the UE ID is masked on a cyclic redundancy check (CRC) of the control channel, and when the control channel is the common control channel, a CRC length ‘z’ of the control channel is equal to or greater than ‘x’ and less than ‘y’.
19. The base station according to claim 16 , wherein the control channel is a PDCCH (Physical Downlink Control Channel).