Base station and user equipment for configuring an extended DRX
Schemes for configuring a longer DRX cycle for user equipment are disclosed. One aspect of the present invention relates to a base station, comprising: a communication control unit configured to control radio communication with user equipment; and a DRX control unit configured to control discontinuous reception (DRX) by the user equipment, wherein the DRX control unit manages a system frame number (SFN), a subframe number and a hyper SFN (HSFN) in the radio communication, wherein the HSFN counts how many times the SFN wraps around, and uses the HSFN to configure an extended DRX (eDRX) having a specified reception period for the user equipment.
1. A base station, comprising:
a communication control unit configured to control radio communication with user equipment; and
a DRX control unit configured to control discontinuous reception (DRX) by the user equipment,
wherein the DRX control unit manages a system frame number (SFN), a subframe number and a hyper SFN (HSFN) in the radio communication, wherein the HSFN counts how many times the SFN wraps around, and uses the HSFN to configure an extended DRX (eDRX) having a specified reception period for the user equipment, and
wherein the communication control unit receives a maximum value of the HSFN supported by the user equipment as capability information from the user equipment.
2. The base station as claimed in claim 1 , wherein the DRX control unit determines whether a subframe calculated from the managed HSFN value, SFN value and subframe number falls in the reception period based on a cycle and a start timing of the reception period of the eDRX configured for the user equipment.
3. The base station as claimed in claim 1 , wherein when configuring the eDRX for the user equipment, the DRX control unit indicates a cycle and a start timing of the reception period of the eDRX and the managed HSFN value to the user equipment.
4. The base station as claimed in claim 1 , wherein the DRX control unit indicates to the user equipment a cycle and a start timing of the reception period of the eDRX, wherein the cycle and the start timing are represented with a value in a range of the SFN, and a value indicative of the HSFN associated with the reception period.
5. The base station as claimed in claim 1 , wherein the DRX control unit suspends configuring the eDRX for the user equipment in a predetermined period immediately before the SFN wraps around.
6. The base station as claimed in claim 2 , wherein when configuring the eDRX for the user equipment, the DRX control unit indicates a cycle and a start timing of the reception period of the eDRX and the managed HSFN value to the user equipment.
7. The base station as claimed in claim 2 , wherein the DRX control unit indicates to the user equipment a cycle and a start timing of the reception period of the eDRX, wherein the cycle and the start timing are represented with a value in a range of the SFN, and a value indicative of the HSFN associated with the reception period.
8. The base station as claimed in claim 3 , wherein the DRX control unit indicates to the user equipment a cycle and a start timing of the reception period of the eDRX, wherein the cycle and the start timing are represented with a value in a range of the SFN, and a value indicative of the HSFN associated with the reception period.
9. The base station as claimed in claim 2 , wherein the DRX control unit suspends configuring the eDRX for the user equipment in a predetermined period immediately before the SFN wraps around.
10. The base station as claimed in claim 3 , wherein the DRX control unit suspends configuring the eDRX for the user equipment in a predetermined period immediately before the SFN wraps around.
11. A user equipment, comprising:
a transmission and reception unit configured to transmit and receive radio signals to/from a base station; and
a DRX unit configured to discontinuously receive the radio signals transmitted from the base station,
wherein the DRX unit manages a system frame number (SFN), a subframe number and a hyper SFN (HSFN) in radio communication with the base station, wherein the HSFN counts how many times the SFN wraps around, and uses the HSFN to activate an extended DRX (eDRX) having a specified reception period, and
wherein the transmission and reception unit indicates to the base station a maximum value of the HSFN supported by the user equipment as capability information.
12. The user equipment as claimed in claim 11 , wherein when a subframe calculated from the managed HSFN value, SFN value and subframe number falls in the reception period configured in accordance with a cycle and a start timing of the reception period of the eDRX configured by the base station, the DRX unit discontinuously receives the radio signals transmitted from the base station.
13. The user equipment as claimed in claim 11 , wherein when the DRX unit is indicated to configure the eDRX from the base station, the DRX unit sets the HSFN to a predetermined initial value.
14. The user equipment as claimed in claim 11 , wherein when the DRX unit is indicated to configure the eDRX from the base station, the DRX unit indicates the managed HSFN value to the base station.
15. The user equipment as claimed in claim 12 , wherein when the DRX unit is indicated to configure the eDRX from the base station, the DRX unit sets the HSFN to a predetermined initial value.
16. The user equipment as claimed in claim 12 , wherein when the DRX unit is indicated to configure the eDRX from the base station, the DRX unit indicates the managed HSFN value to the base station.