Method and device for controlling MBMS receiving in a wireless communication system
The present invention provides a method of receiving a multimedia broadcast/multicast service in a user equipment of a wireless communication system based on MBSFN transmission and a method of assisting the user equipment to receive the service in the corresponding base station; wherein the user equipment receives a transport block from the base station in a predefined period; and then judges whether a notification indicator in the transport block is activated, if so, then judges whether a service identification of a multimedia broadcast/multicast service subscribed to by the user equipment is included in a transport block including a control signaling in the transport block, if so, then receives the multimedia broadcast/multicast service. By implementing the present invention, a user terminal in IDLE mode only needs a predefined period such as a DRX period to wake up to receive the notification indicator to judge whether a new service will start without waking up at extra time.
1. A method of receiving a service in a user equipment of a wireless communication system based on Multicast Broadcast Single Frequency Network (MBSFN) transmission, wherein the method comprises the following steps of:
a. receiving a plurality of transport blocks from a base station in a predefined period;
b. judging whether a notification indicator in a first transport block of the plurality of transport blocks is activated;
c. judging whether a service identification of a multimedia broadcast/multicast service subscribed to by the user equipment is included in a second transport block of the plurality of transport blocks including a control signaling, if the notification indicator is activated, wherein the first and second transport blocks are different;
d. receiving the multimedia broadcast/multicast service, if the service identification of the multimedia broadcast/multicast service subscribed to by the user equipment is included in the second transport block.
2. The method according to claim 1 , wherein the step of judging whether the service identification of the multimedia broadcast/multicast service subscribed to by the user equipment is included in the second transport block comprises the following steps of:
I. decoding and demodulating the second transport block according to obtained modulation and coding information;
II. obtaining modified services information from the decoded and demodulated second transport block;
III. judging whether the service identification of the multimedia broadcast/multicast service subscribed to by the user equipment is included in the modified services information.
3. The method according to claim 1 , wherein the step d further comprises the step of:
receiving the multimedia broadcast/multicast service on a determined time-frequency resource.
4. The method according to claim 1 , wherein the first transport block comprises downlink control information, and the downlink control information comprises:
position information of the second transport block,
position information of modulation and coding information of the second transport block, and
position information of the notification indicator.
5. The method according claim 4 , wherein the step b further comprises the following steps of:
b1. obtaining the downlink control information from the first transport block;
b2. judging whether the notification indicator in the downlink control information is activated.
6. A method of receiving a service in a user equipment of a wireless communication system based on Multicast Broadcast Single Frequency Network (MBSFN) transmission, wherein the method comprises the following steps of:
a. receiving a plurality of transport blocks from a base station in a predefined period;
b. judging whether a notification indicator in a first transport block of the plurality of transport blocks is activated;
c. judging whether a service identification of a multimedia broadcast/multicast service subscribed to by the user equipment is included in a second transport block of the plurality of transport blocks including a control signaling, if the notification indicator is activated;
d. receiving the multimedia broadcast/multicast service, if the service identification of the multimedia broadcast/multicast service subscribed to by the user equipment is included in the second transport block;
wherein the first transport block comprises downlink control information, and the downlink control information comprises:
position information of the second transport block,
position information of modulation and coding information of the second transport block, and
position information of the notification indicator;
wherein the step of judging whether the service identification of the multimedia broadcast/multicast service subscribed to by the user equipment is included in the second transport block comprises the following steps of:
i. obtaining the position information and the modulation and coding information of the second transport block from the downlink control information;
ii. searching the second transport block according to the position information;
iii. decoding and demodulating the searched second transport block according to the modulation and coding information;
iv. obtaining modified services information from the decoded and demodulated second transport block; and
v. judging whether the service identification of the multimedia broadcast/multicast service subscribed to by the user equipment is included in the modified services information.
7. The method according to claim 4 , wherein the second transport block includes service data.
8. The method according to claim 1 , wherein the first transport block is transmitted in a MBSFN sub-frame, and the control signaling is a Multicast Control Channel (MCCH) signaling.
9. The method according to claim 1 , wherein the predefined period is a Discontinuous Reception (DRX) period.
10. A method of assisting a user equipment to receive a multimedia broadcast/multicast service in a base station of a wireless communication system based on Multicast Broadcast Single Frequency Network (MBSFN) transmission, wherein the method comprises the following steps of:
A. in the base station, activating a notification indicator in a first transport block that is sent at a starting time of a predefined period, before starting to transmit a new multimedia broadcast/multicast service, and updating a second transport block including a control signaling, according to the new multimedia broadcast/multicast service, wherein the first and second transport blocks are different; and
B. sending the first transport block.
11. The method according to claim 10 , wherein the first transport block is transmitted in a MBSFN sub-frame, and the control signaling is a Multicast Control Channel (MCCH) signaling.
12. The method according to claim 10 , wherein the predefined period is a Discontinuous Reception (DRX) period.
13. A user equipment of a wireless communication system based on Multicast Broadcast Single Frequency Network (MBSFN) transmission, comprising:
a receiver configured to receive a plurality of transport blocks from a base station in a predefined period;
at least one processor programmed to determine whether a notification indicator in a first transport block of the plurality of transport blocks is activated; and
the at least one processor being programmed to determine whether a service identification of a multimedia broadcast/multicast service subscribed to by the user equipment is included in a second transport block of the plurality of transport blocks including a control signaling, if the notification indicator is activated, wherein the first and second transport blocks are different;
wherein the receiver is configured to receive the multimedia broadcast/multicast service, if the service identification of the multimedia broadcast/multicast service subscribed to by the user equipment is included in the second transport block.
14. A base station of a wireless communication system based on Multicast Broadcast Single Frequency Network (MBSFN) transmission, comprising:
at least one processor programmed to activate a notification indicator in a first transport block that is sent at a starting time of a predefined period, and to update a second transport block including a control signaling, according to a new multimedia broadcast/multicast service, wherein the first and second transport blocks are different, before starting to transmit the new multimedia broadcast/multicast service; and
a transmitter configured to transmit the transport block.
15. A method of receiving a service in a user equipment of a wireless communication system based on Multicast Broadcast Single Frequency Network (MBSFN) transmission, wherein the method comprises the following steps of:
a. receiving a plurality of transport blocks from a base station in a predefined period;
b. judging whether a notification indicator in a given transport block of the plurality of transport blocks is activated;
c. if the notification indicator is activated, judging whether a service identification of a multimedia broadcast/multicast service subscribed to by the user equipment is included in the given transport block; and
d. receiving the multimedia broadcast/multicast service, if the service identification of the multimedia broadcast/multicast service subscribed to by the user equipment is included in the given transport block.