CN107734463B

CN107734463B - Method for receiving multicast service, method and device for sending multicast service

Info

Publication number: CN107734463B
Application number: CN201610663963.9A
Authority: CN
Inventors: 傅婧; 梁靖; 张元�; 王彦
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2016-08-12
Filing date: 2016-08-12
Publication date: 2019-12-20
Anticipated expiration: 2036-08-12
Also published as: CN107734463A

Abstract

The invention provides a method for receiving multicast service, a method for sending multicast service and a device thereof, wherein the method comprises the following steps: receiving the configuration of a network side, wherein a terminal works or resides on an auxiliary carrier configured by the network side; and after the terminal receives the update prompt of the multicast control channel on the auxiliary carrier, the terminal switches to a pre-configured main carrier to receive the multicast service interested by the terminal. In the embodiment of the invention, after receiving the update prompt of the multicast control channel on the auxiliary carrier, the terminal actively switches the auxiliary carrier to the main carrier and receives the multicast service on the main carrier; the invention provides a method for how a terminal working on an auxiliary carrier wave receives multicast service, the terminal can dynamically switch between a main carrier wave and the auxiliary carrier wave to receive the multicast service, and the multicast service is received while the load of the main carrier wave is reduced.

Description

Method for receiving multicast service, method and device for sending multicast service

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method for receiving a multicast service, a method for sending a multicast service, and an apparatus for sending a multicast service.

Background

The narrowband Internet of Things (NB-IoT) working phase (Work Item, WI) is passed and started in the 3GPP Release 13(Release 13) phase. The goal of the WI phase of the narrowband Internet of Things is to standardize the wireless access of the Cellular Internet of Things (CIoT). The technology is extended based on Long Term Evolution (LTE)/LTE evolution (LTE-a), and the network characteristics/goals mainly considered are: the indoor coverage is enhanced, the access of a large number of low-speed devices is supported, the delay sensitivity is low, the device cost is reduced, the device power consumption is reduced, the network architecture is optimized, and the like.

Some of the characteristics that may exist for currently recognized narrowband internet of things (NB-IoT) communications are:

NB-IoT terminals have low mobility;

the data transmission between the NB-IoT terminal and the network side has low real-time requirement on the data transmission;

NB-IoT terminals are energy limited, requiring extremely low power consumption;

only small data volume information transmission is carried out between the NB-IoT terminal and the network side;

NB-IoT terminals have low implementation complexity, and so on.

An actual NB-IoT terminal may have one or more of the characteristics described above.

To mitigate cell loading, NB-IoT supports multi-carrier operation. Under multi-carrier operation, the carriers are divided into a main (anchor) carrier and a non-anchor carrier. Wherein, the terminal on the anchor carrier can receive NPBCH (narrowband physical broadcast channel)/NPSS (narrowband primary synchronization signal), NSSS (narrowband secondary synchronization signal) and SIB (SIB) transmission, and the R13 terminal on the non-anchor carrier only expects NB-PDCCH (narrowband physical downlink control channel)/NB-PDSCH (narrowband physical downlink shared channel) and/or NB-PUSCH (narrowband physical uplink shared channel) currently.

NB-IoT terminals cannot operate on multiple carriers simultaneously due to limited capabilities. In R13, random access can only be initiated on an anchor carrier, and when a connected UE is configured as a non-anchor carrier, the UE will subsequently operate on the non-anchor carrier until entering an idle state, or it is necessary to initiate random access in a connected state, or it is allocated to another carrier.

Idle UEs in R13 only support camping on an anchor carrier, and subsequent enhancements may allow receiving pages or even camping on a non-anchor carrier.

In LTE, Multicast services can be transmitted in MBMS (Multimedia Broadcast/Multicast Service) and SC-PTM (Single Cell Point To Multicast) modes.

In the MBMS mode, all cells participating in MBMS in a certain MBSFN (Multimedia Broadcast multicast service Single Frequency Network) area transmit the same content on the same time and Frequency domain resources. The logical channels of the MBMS include an MCCH (Multicast Control Channel) and an MTCH (Multicast Traffic Channel). The MBSFN area identity and the corresponding MCCH configuration information are broadcasted in SIB 13. The MCCH signaling carries the ongoing MBMS service information of the current cell and the corresponding radio resource configuration. And the UE receives the MBMS transmitted on the MTCH by receiving the MCCH. MCCH message update is similar to the concept of a system message modification period, and the MCCH can be updated only at the boundary of the MCCH modification period. And the MCCH message updating indication is notified through the PDCCH scrambled by the M-RNTI.

In the SC-PTM mode, multicast service is transmitted in a single cell, and a base station is responsible for scheduling. The base station can flexibly schedule the transmission of multicast service and unicast service on a certain cell. The logical channels of the SC-PTM include an SC-MCCH (Single Cell multicast Control Channel) and an SC-MTCH (Single Cell multicast transport Channel). SC-MCCH and SC-MTCH are transmitted on DL-SCH, UE obtains specific scheduling information on corresponding DL-SCH through PDCCH scrambled based on specific RNTI (RNTI corresponding to SC-MCCH is SC-RNTI which is a fixed value, RNTI corresponding to SC-MTCH is G-RNTI, each MBMS corresponds to G-RNTI one by one and is configured in SC-MCCH). The SIB20 broadcasts configuration information of the SC-MCCH. The SC-MCCH provides the MBMS service information and corresponding scheduling information of the current cell, the SC-PTM condition provided by the adjacent cell and the like. The modification period concept is also used when updating SC-MCCH as well as MCCH. And the SC-MCCH updating indication is notified through the PDCCH scrambled by the SC-N-RNTI. And after the UE receives the SC-MCCH updating indication, receiving the updated SC-MCCH in the same subframe.

NB-IoT supports multi-carrier operation, but NB-IoT terminals can only operate on one carrier at the same time. If the multicast service is transmitted only on the anchor carrier, and the UE is currently operating or camping on a non-anchor carrier, how the terminal receives the multicast service at this time has not been studied yet.

Disclosure of Invention

The invention aims to provide a method and a device for receiving multicast service, which solve the problem that the terminal cannot receive the multicast service when working on an auxiliary carrier (non-anchor carrier) in the prior art.

In order to achieve the above object, an embodiment of the present invention provides a method for receiving a multicast service, which is applied to a terminal side, and includes:

receiving the configuration of a network side, wherein a terminal works or resides on an auxiliary carrier configured by the network side;

and after the terminal receives the update prompt of the multicast control channel on the auxiliary carrier, the terminal switches to a pre-configured main carrier to receive the multicast service interested by the terminal.

Wherein, after the terminal receives the update prompt of the multicast control channel on the auxiliary carrier, the step of switching the terminal to a pre-configured main carrier to receive the multicast service interested by the terminal includes:

after the terminal receives the update prompt of the multicast control channel on the auxiliary carrier, the terminal is switched to a pre-configured main carrier to receive multicast configuration information transmitted on the updated multicast control channel;

and the terminal receives the data information of the multicast service which is transmitted on the multicast service channel indicated by the updated multicast configuration information and is interested by the terminal on the main carrier.

Wherein, the step that the terminal receives the update prompt of the multicast control channel on the auxiliary carrier wave comprises the following steps:

the terminal receives a physical downlink control channel scrambled by a preset wireless network temporary identifier on the auxiliary carrier, and analyzes the physical downlink control channel to obtain an update prompt of a multicast control channel; or,

and the terminal receives a preset radio resource control message on the auxiliary carrier wave and analyzes the radio resource control message to acquire an update prompt of a multicast control channel.

after the terminal receives the update prompt of the multicast control channel on the auxiliary carrier, the terminal interrupts the communication with the auxiliary carrier at all the time when the network side transmits the multicast service, and switches to a pre-configured main carrier to receive the multicast service which is interested by the terminal; and the terminal recovers the communication with the auxiliary carrier at the moment when the network side does not transmit the multicast service.

Before the terminal switches to a pre-configured primary carrier to receive the multicast service interested by the terminal, the method further includes:

and the terminal reports the identifier of the multicast service which is interested by the terminal to a network side.

Before the terminal reports the identifier of the multicast service that the terminal is interested in to the network side, the method further includes:

judging whether the terminal is currently set to receive multicast service preferentially or unicast service preferentially;

if the terminal is currently set to receive the unicast service preferentially, the terminal receives the unicast service on an auxiliary carrier configured on a network side;

if the terminal is set to receive the multicast service preferentially, the terminal reports the identifier of the multicast service which is interested by the terminal to a network side.

When a terminal reports an identifier of a multicast service which is interested by the terminal to a network side, and the terminal receives an update prompt of a multicast control channel on the auxiliary carrier, the terminal switches to a pre-configured main carrier to receive the multicast service which is interested by the terminal, and the method comprises the following steps:

after the terminal receives the update prompt of the multicast control channel on the auxiliary carrier, the terminal interrupts the communication with the auxiliary carrier at the moment that the network side transmits the multicast service which is interested by the terminal, and switches to a pre-configured main carrier to receive the multicast service which is interested by the terminal; and at the moment when the network side transmits the multicast service which is not interested by the terminal and the moment when the network side does not transmit the multicast service, the terminal recovers the communication with the auxiliary carrier.

After the terminal reports the identifier of the multicast service that the terminal is interested in to the network side, the method further includes:

receiving scheduling information of a multicast service on a carrier where a terminal is currently located from a network side, and receiving the multicast service which the terminal is interested in on the carrier where the terminal is currently located according to the scheduling information; the network side stops scheduling the unicast service on the carrier where the terminal is currently located during the period of sending the multicast service which the terminal is interested in.

After the terminal receives the update prompt of the multicast control channel on the secondary carrier, and the terminal switches to a pre-configured primary carrier to receive the multicast service interested by the terminal, the method further includes:

when a terminal receives a multicast service which the terminal is interested in on a main carrier, if a network side needs to send or receive a preset key event on an auxiliary carrier configured for the terminal, the terminal suspends receiving the multicast service on the main carrier and switches to the auxiliary carrier to send or receive the preset key event.

The embodiment of the invention also provides a method for sending the multicast service, which is applied to a network side and comprises the following steps:

configuring an auxiliary carrier for a terminal so that the terminal works or resides on the auxiliary carrier;

sending an update prompt of a multicast control channel to a terminal on the auxiliary carrier;

and sending the multicast service on a pre-configured main carrier, so that the terminal can switch to the main carrier to receive the multicast service which is interested by the terminal after receiving the update prompt of the multicast control channel.

Wherein, the step of sending the update prompt of the multicast control channel to the terminal on the auxiliary carrier comprises:

sending an update prompt of a multicast control channel on the auxiliary carrier through a physical downlink control channel scrambled by a preset wireless network temporary identifier; or,

and sending an update prompt of a multicast control channel on the auxiliary carrier wave through a preset radio resource control message.

Wherein, during the period of sending the multicast service on the pre-configured primary carrier, the method further comprises:

and in all the moments of sending the multicast service on the pre-configured main carrier, the network side stops scheduling and paging the terminal.

Before the multicast service is sent on the preconfigured primary carrier, the method further includes:

and receiving the identifier of the multicast service which is reported by the terminal and is interested by the terminal.

After receiving the identifier of the multicast service that the terminal is interested in, which is reported by the terminal, the method further includes:

and the network side stops scheduling and paging the terminal within the time when the multicast service which is interested by the terminal is transmitted on the pre-configured main carrier.

sending scheduling information aiming at the multicast service on the carrier where the terminal is currently located to the terminal, wherein the scheduling information is used for scheduling the terminal to receive the multicast service which is interested by the terminal on the carrier where the terminal is currently located;

and stopping the scheduling of the unicast service on the carrier where the terminal is currently positioned during the period of sending the multicast service which is interested by the terminal.

Wherein, after the multicast service is sent on the preconfigured primary carrier, the method further includes:

during the period that the network side sends the multicast service which the terminal is interested in on the main carrier, if the network side needs to send or receive the preset key event on the auxiliary carrier configured for the terminal, the network side stops the scheduling of the multicast service on the main carrier and schedules the preset key event on the auxiliary carrier.

The embodiment of the present invention further provides a device for receiving a multicast service, which is applied to a terminal side, and includes:

the configuration receiving module is used for receiving the configuration of the network side, and the terminal works or resides on the auxiliary carrier configured by the network side;

and the service receiving module is used for switching to a pre-configured main carrier to receive the multicast service interested by the terminal after receiving the update prompt of the multicast control channel on the auxiliary carrier.

Wherein, the service receiving module comprises:

the first service receiving submodule is used for switching to a pre-configured main carrier to receive multicast configuration information transmitted on an updated multicast control channel after receiving an update prompt of the multicast control channel on the auxiliary carrier;

and the second service receiving submodule is used for receiving the data information of the multicast service which is transmitted on the multicast service channel indicated by the updated multicast configuration information and is interested by the terminal on the main carrier.

Wherein the apparatus further comprises:

the first prompt receiving module is used for receiving a physical downlink control channel scrambled by a preset wireless network temporary identifier on the auxiliary carrier, and analyzing the physical downlink control channel to obtain an update prompt of a multicast control channel; and/or the presence of a gas in the gas,

and the second prompt receiving module is used for receiving a preset radio resource control message on the auxiliary carrier and analyzing the radio resource control message to acquire an update prompt of a multicast control channel.

Wherein, the service receiving module comprises:

a third service receiving submodule, configured to interrupt communication with the auxiliary carrier at all times when the network side transmits a multicast service after receiving an update prompt of a multicast control channel on the auxiliary carrier, and switch to a pre-configured main carrier to receive a multicast service that is interested by the terminal; and recovering the communication with the auxiliary carrier at the moment when the network side does not transmit the multicast service.

Wherein the apparatus further comprises:

an identifier reporting module, configured to report, to a network side, an identifier of the multicast service in which the terminal is interested

Wherein the apparatus further comprises:

the judging module is used for judging whether the terminal is currently set to receive the multicast service preferentially or the unicast service preferentially;

the unicast receiving module is used for receiving the unicast service on the auxiliary carrier wave configured on the network side if the terminal is currently set to preferentially receive the unicast service;

and the reporting module is used for reporting the identifier of the multicast service which is interested by the terminal to a network side if the terminal is currently set to receive the multicast service preferentially.

Wherein, the service receiving module comprises:

a fourth service receiving submodule, configured to, when the terminal reports the identifier of the multicast service that the terminal is interested in to the network side, after receiving the update prompt of the multicast control channel on the auxiliary carrier, interrupt communication with the auxiliary carrier at a time when the network side transmits the multicast service that the terminal is interested in, and switch to a pre-configured main carrier to receive the multicast service that the terminal is interested in; and recovering the communication with the auxiliary carrier at the time when the network side transmits the multicast service which is not interested by the terminal and the time when the network side does not transmit the multicast service.

Wherein the apparatus further comprises:

the receiving and scheduling module is used for receiving scheduling information of a multicast service on a carrier where the terminal is currently located from a network side and receiving the multicast service which the terminal is interested in on the carrier where the terminal is currently located according to the scheduling information; the network side stops scheduling the unicast service on the carrier where the terminal is currently located during the period of sending the multicast service which the terminal is interested in.

Wherein the apparatus further comprises:

and the key event processing module is used for suspending the multicast service reception on the main carrier and switching to the auxiliary carrier to transmit or receive the preset key event if the network side needs to transmit or receive the preset key event on the auxiliary carrier configured for the terminal during the period that the terminal receives the multicast service which is interested by the terminal on the main carrier.

The embodiment of the present invention further provides a device for sending a multicast service, which is applied to a network side, and includes:

the configuration module is used for configuring an auxiliary carrier for the terminal so that the terminal works or resides on the auxiliary carrier;

a prompt sending module, configured to send an update prompt of a multicast control channel to a terminal on the secondary carrier;

and the service sending module is used for sending the multicast service on the pre-configured main carrier, so that the terminal can switch to the main carrier to receive the multicast service which is interested by the terminal after receiving the update prompt of the multicast control channel.

Wherein, the prompt sending module comprises:

the first prompt sending submodule is used for sending an update prompt of a multicast control channel on the auxiliary carrier wave through a physical downlink control channel scrambled by a preset wireless network temporary identifier; and/or the presence of a gas in the gas,

and the second prompt sending submodule is used for sending an update prompt of the multicast control channel on the auxiliary carrier wave through a preset wireless resource control message.

Wherein the apparatus further comprises:

the first processing module is used for stopping scheduling and paging the terminal at the network side in all the time when the multicast service is sent on the pre-configured main carrier.

Wherein the apparatus further comprises:

and the identification receiving module is used for receiving the identification of the multicast service which is reported by the terminal and is interested by the terminal.

Wherein the apparatus further comprises:

and the second processing module is used for stopping scheduling and paging the terminal at the time when the multicast service which the terminal is interested in is sent on the pre-configured main carrier.

Wherein the apparatus further comprises:

the sending scheduling module is used for sending scheduling information aiming at the multicast service on the carrier where the terminal is located to the terminal, and the scheduling information is used for scheduling the terminal to receive the multicast service which the terminal is interested in on the carrier where the terminal is located;

and the scheduling stopping module is used for stopping scheduling the unicast service on the carrier where the terminal is currently located during the period of sending the multicast service which the terminal is interested in.

Wherein the apparatus further comprises:

and the key event scheduling module is used for stopping the scheduling of the multicast service on the main carrier and scheduling the preset key event on the auxiliary carrier if the network side needs to send or receive the preset key event on the auxiliary carrier configured for the terminal during the period that the network side sends the multicast service which is interested by the terminal on the main carrier.

The technical scheme of the invention at least has the following beneficial effects:

in the method for receiving the multicast service, the method for sending the multicast service and the device thereof, the terminal actively switches from the auxiliary carrier to the main carrier and receives the multicast service on the main carrier after receiving the update prompt of the multicast control channel on the auxiliary carrier; the invention provides a method for how a terminal working on an auxiliary carrier wave receives multicast service, the terminal can dynamically switch between a main carrier wave and the auxiliary carrier wave to receive the multicast service, and the multicast service is received while the load of the main carrier wave is reduced.

Drawings

Fig. 1 is a flowchart illustrating basic steps of a method for receiving a multicast service according to a first embodiment of the present invention;

fig. 2 is a flowchart illustrating the basic steps of a method for transmitting multicast service according to a second embodiment of the present invention;

fig. 3 shows one of interaction diagrams of a terminal and a network side in an example of a method for receiving a multicast service and a method for sending a multicast service according to an embodiment of the present invention;

fig. 4 is a second interaction diagram illustrating a terminal and a network side in the method for receiving a multicast service and the method for sending a multicast service according to the embodiment of the present invention;

fig. 5 shows a third interaction diagram illustrating a terminal and a network side in the method for receiving a multicast service and the method for sending a multicast service according to the embodiment of the present invention;

fig. 6 is a block diagram illustrating an apparatus for receiving a multicast service according to a third embodiment of the present invention;

fig. 7 is a block diagram illustrating an apparatus for receiving a multicast service according to a fourth embodiment of the present invention and an apparatus for transmitting a multicast service according to a sixth embodiment;

fig. 8 is a block diagram illustrating an apparatus for transmitting a multicast service according to a fifth embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, a first embodiment of the present invention provides a method for receiving a multicast service, which is applied to a terminal side, and includes:

step 11, receiving the configuration of the network side, wherein the terminal works or resides on the auxiliary carrier configured by the network side;

and step 12, after the terminal receives the update prompt of the multicast control channel on the auxiliary carrier, the terminal switches to a pre-configured main carrier to receive the multicast service interested by the terminal.

Accordingly, as shown in fig. 2, a second embodiment of the present invention provides a method for sending a multicast service, which is applied to a network side, and includes:

step 21, configuring an auxiliary carrier for the terminal so that the terminal works or resides on the auxiliary carrier;

step 22, sending an update prompt of the multicast control channel to the terminal on the auxiliary carrier;

and step 23, sending the multicast service on the pre-configured main carrier, so that the terminal can switch to the main carrier to receive the multicast service which is interested by the terminal after receiving the update prompt of the multicast control channel.

In the above embodiments of the present invention, the narrowband internet of things supports multi-carrier operation; and under the multi-carrier operation, the carriers are divided into a main carrier (anchor carrier) and a non-anchor carrier (non-anchor carrier). The terminal can work on the pre-configured main carrier after accessing the network, and when the network side configures the auxiliary carrier for the terminal, the terminal is switched to the auxiliary carrier so as to work in the auxiliary carrier. It should be noted that, in the process that the terminal operates on the secondary carrier, if the network side cancels the configuration of the secondary carrier, the terminal returns to the primary carrier to operate or reside.

Specifically, the preset multicast service that the terminal is interested in may be understood as a preset multicast service that the terminal needs to receive or a preset multicast service that the terminal wants to receive.

In the embodiment of the invention, after the terminal working or residing on the auxiliary carrier receives the update prompt of the multicast control channel (MCCH or SC-MCCH) on the auxiliary carrier, the terminal is switched to the main carrier preset for the terminal to receive the multicast service interested by the terminal; after the receiving of the multicast service is completed, or after the transmission of the multicast service by the network side is completed, or when a related key event on the auxiliary carrier wave, switching back to the auxiliary carrier wave; the invention provides a method for how a terminal working on an auxiliary carrier wave receives multicast service, the terminal can dynamically switch between a main carrier wave and the auxiliary carrier wave to receive the multicast service, and the multicast service is received while the load of the main carrier wave is reduced.

Specifically, step 12 in the above embodiment of the present invention includes:

step 121, after the terminal receives the update prompt of the multicast control channel on the secondary carrier, the terminal switches to a pre-configured primary carrier to receive multicast configuration information transmitted on the updated multicast control channel;

and step 122, the terminal receives, on the primary carrier, data information of the multicast service that the terminal is interested in, which is transmitted on the multicast service channel indicated by the updated multicast configuration information.

After receiving the update prompt of the multicast control channel on the auxiliary carrier, the terminal switches the radio frequency transceiver to the main carrier to receive the multicast control channel (MCCH or SC-MCCH) to acquire service configuration information, and then receives data information of a preset multicast service which is transmitted on the multicast service control channel (MTCH or SC-MTCH) and is interested by the terminal on the main carrier based on the service configuration information.

Specifically, the step of receiving, by the terminal, an update notification of a multicast control channel on the secondary carrier in the first embodiment of the present invention includes:

step 13, the terminal receives a physical downlink control channel scrambled by a preset wireless network temporary identifier on the auxiliary carrier, and analyzes the physical downlink control channel to obtain an update prompt of a multicast control channel; or,

and step 14, the terminal receives a preset radio resource control message on the auxiliary carrier, and analyzes the radio resource control message to acquire an update prompt of a multicast control channel.

Accordingly, step 22 in the second embodiment of the present invention comprises:

step 221, sending an update prompt of a multicast control channel on the secondary carrier through a physical downlink control channel scrambled by a preset wireless network temporary identifier; or,

step 222, sending an update prompt of the multicast control channel on the secondary carrier by a preset radio resource control message.

The update prompt of the multicast control channel in the above embodiment of the present invention may be:

a physical downlink control channel (such as PDCCH of SC-N-RNTI) scrambled by a preset Radio Network Temporary Identifier (RNTI); or by a dedicated radio resource control message (i.e., RRC message).

It should be noted that, the receiving time corresponding to the physical downlink control channel scrambled by the preset radio network temporary identifier and/or the corresponding radio network temporary identifier is scrambled; the above parameters are all broadcasted by the network side, that is, the terminal can determine the receiving time of the physical downlink control channel scrambled by the preset wireless network temporary identifier through the broadcasting of the network side, and/or the terminal can determine which wireless network temporary identifier scrambling is used by the physical downlink control channel scrambled by the preset wireless network temporary identifier through the broadcasting of the network side. Furthermore, the network side can broadcast the parameters in two ways, one is to additionally broadcast the parameters in the system message of the network side; another way is to use the time when the multicast control channel on the primary carrier broadcasted in the system message of the network side is updated and the corresponding radio network identifier edge during the update into the reception of the secondary carrier.

Specifically, in the above embodiment of the present invention, after the terminal receives the update prompt of the multicast control channel on the secondary carrier, the terminal switches to the pre-configured primary carrier to receive the multicast service that the terminal is interested in, which can be divided into three cases, where in the first case, the terminal resides in or works on the secondary carrier, and multicast reception is prioritized; in the second situation, the terminal works on the auxiliary carrier wave and reports the multicast service which the terminal is interested in, and when the multicast service which the terminal is interested in exists, multicast receiving is carried out preferentially; in the third case, the terminal resides or operates in the secondary carrier, and preferentially processes the reception and transmission of some critical events on the secondary carrier.

The three cases are described in detail below:

in the first case: the terminal resides in or works under the auxiliary carrier wave, and multicast reception is preferentially carried out; namely, step 12 in the first embodiment of the present invention includes:

Correspondingly, in the second embodiment of the present invention, the method for sending the multicast service on the network side further includes:

step 24, the network side stops scheduling and paging the terminal in all the time when the multicast service is sent on the pre-configured main carrier.

That is, the terminal side interrupts communication with the non-anchor carrier at all multicast service-related times (including reception of (SC-) MCCH, all (SC-) MTCH transmission, related SIB transmission), and resumes communication with the non-anchor carrier at the remaining times.

Examples are as follows:

as shown in fig. 3, when the terminal resides in or operates on the secondary carrier and multicast reception is prioritized, the operations of the terminal side and the network side include:

it should be noted that, in this embodiment, the idle-state terminal resides in the non-anchor carrier for paging monitoring, and the connected-state terminal performs data transmission and reception in the non-anchor carrier. Multicast is transmitted by SC-PTM (Single cell point To multicast) mode.

Step 31, the terminal side receives an SC-MCCH updating indication notified by a special RRC message on a non-anchor carrier; or monitoring the PDCCH scrambled by the SC-N-RNTI to acquire SC-MCCH updating. The corresponding time and/or the corresponding SC-N-RNTI when the UE side receives the PDCCH scrambled by the SC-N-RNTI on the non-anchor carrier can be additionally broadcast by the anchor carrier; or follow the SC-PTM related configuration on the anchor carrier;

in step 32, since the network side may not know which UEs need to receive the SC-PTM service or what the SC-PTM service the UE is interested in, after the network side notifies the SC-MCCH update indication of the terminal on the non-anchor, it is considered that no UE can be scheduled and paged during all the time instants when the anchor carrier broadcasts the SC-PTM service (including receiving the SC-MCCH, all SC-MTCH transmissions, and/or SIB related to SC-PTM).

Correspondingly, at this time, after receiving the SC-MCCH update indication in step 31, the terminal switches to the anchor carrier for SC-PTM service reception, reads the updated SC-MCCH, and receives the SC-PTM service of interest. And at the time of all SC-PTM service related (including receiving SC-MCCH, all SC-MTCH transmission and/or SIB related to SC-PTM), interrupting the communication with the non-anchor carrier, for example, at the time of SC-MCCH and all SC-MTCH transmission, if the terminal is in an idle state, the terminal does not need to monitor the paging signal on the non-anchor carrier; when the SC-MCCH and all SC-MTCH transmissions occur, the connected UE does not need to monitor/receive downlink signals on non-anchor carriers and/or does not send uplink signals and the like.

It should be further noted that the above method is also applicable to a Multicast Service in an MBMS (Multimedia Broadcast Multicast Service) manner, except that the SIB/Multicast control channel/Multicast Service control channel for the related Multicast transmission and the related Multicast control channel update indication need to be adjusted accordingly.

In the second case: the terminal works on the auxiliary carrier and reports the multicast service interested by the terminal, and when the multicast service interested by the terminal exists, multicast reception is preferentially carried out.

In this case, before the terminal switches to a pre-configured primary carrier to receive the multicast service interested by the terminal, the method further includes:

and step 15, the terminal reports the identifier of the multicast service interested by the terminal to a network side.

Or before the terminal switches to a pre-configured primary carrier to receive the multicast service interested by the terminal, the method further includes:

step 16, judging whether the terminal is currently set to receive multicast service preferentially or unicast service preferentially;

step 17, if the terminal is currently set to receive the unicast service preferentially, the terminal receives the unicast service on an auxiliary carrier configured on the network side;

and step 18, if the terminal is set to receive the multicast service preferentially, the terminal reports the identifier of the multicast service which the terminal is interested in to the network side.

Specifically, when the terminal reports the identifier of the multicast service that the terminal is interested in to the network side through step 15 or step 18, step 12 in the first embodiment of the present invention includes:

after the terminal receives the update prompt of the multicast control channel on the auxiliary carrier, the terminal interrupts the communication with the auxiliary carrier at the time when the network side transmits the multicast service which is interested by the terminal (namely, the time when the terminal receives the multicast service which is interested by the terminal), and switches to a pre-configured main carrier to receive the multicast service which is interested by the terminal; and at the moment when the network side transmits the multicast service which is not interested by the terminal and the moment when the network side does not transmit the multicast service, the terminal recovers the communication with the auxiliary carrier.

Correspondingly, in the method for sending a multicast service on a network side in the second embodiment of the present invention, before sending the multicast service on a preconfigured primary carrier, the method further includes:

and step 25, receiving the identifier of the multicast service which is reported by the terminal and is interested by the terminal.

Further, the method for sending the multicast service on the network side in the second embodiment of the present invention further includes:

step 26, the network side stops scheduling and paging the terminal within the time when the multicast service interested by the terminal is transmitted on the pre-configured primary carrier.

Namely, the terminal side reports the interested multicast service, the terminal side only interrupts the communication with the non-anchor carrier at the relevant time (including receiving (SC-) MCCH and (SC-) MTCH transmission corresponding to the interested service) of the interested multicast service, and the other time resumes the communication with the non-anchor carrier.

It should be noted that, the time for transmitting the multicast service interested by the terminal at the network side specifically refers to: the time when the terminal receives the multicast control channel of the multicast service of interest, the time when the terminal receives the multicast traffic channel of the multicast service of interest, the time when the terminal reads the necessary system information, and the like.

It should be noted that, in a second case, an embodiment of the present invention further provides a method for receiving a multicast service, that is, after the terminal reports, to a network side, an identifier of a multicast service that the terminal is interested in, the method further includes:

Correspondingly, in the second embodiment, after the network side receives the identifier of the multicast service that the terminal is interested in, which is reported by the terminal, the method further includes:

The carrier where the terminal is currently located may be a primary carrier or a secondary carrier, which is not limited herein. Namely, the terminal side sends an interested service indication (including an interested service identifier) to the network side; after receiving the message, the network side can avoid unicast scheduling (including unicast transmission and reception) for the terminal when scheduling the corresponding multicast service; and the terminal still receives the multicast traffic of interest to the terminal on the carrier (whether anchor or non-anchor) on which the terminal is currently located.

Examples are as follows:

as shown in fig. 4, the terminal works on the secondary carrier and reports the multicast service that the terminal is interested in, and when there is a multicast service that the terminal is interested in, and multicast reception is prioritized, the operations of the terminal side and the network side include:

it should be noted that, in this embodiment, the idle-state terminal resides in the non-anchor carrier for paging monitoring, and the connected-state terminal performs data transmission and reception in the non-anchor carrier. The Multicast is transmitted by MBMS (multimedia broadcast Multicast Service).

Step 41a, a terminal side receives a PDCCH notification MCCH update scrambled by a special RRC message or an M-RNTI on a non-anchor carrier;

step 41b, if the terminal side and the network side keep the connection of the air interface, the UE sends the MBMS interested indication to the network side on the non-anchor carrier, which may include the specific interested MBMS service identifier;

it should be noted that, in the embodiment of the present invention, the sequence of step 41a and step 41b is not limited, that is, step 41b may also occur before step 41a, for example, when the terminal is not configured with a non-anchor carrier, the terminal sends an indication of interest in the MBMS and a specific multicast service identifier to the network side on the anchor carrier; or after the UE is configured to the non-anchor carrier, the UE sends the indication interested in the MBMS and the specific multicast service identifier to the network side on the non-anchor carrier. At this time, in step 41a, the network side may further determine whether to notify the MCCH update through the dedicated RRC message according to the information in step 41b, for example, when only the interested MBMS service starts to be transmitted, the network side notifies the ue MCCH update through the dedicated RRC message.

Step 42: the network side knows the transmission timing of the MBMS (including the transmission of MCCH, MBMS service of interest in MTCH transmission, and/or MBMS-related SIB), and during this period, does not schedule or page the UE.

Correspondingly, at this time, after receiving the MCCH update indication in step 41a, the terminal switches to the anchor carrier for MBMS service reception, reads the updated MCCH, and receives the MBMS service of interest. And during this period (including receiving MTCH transmissions corresponding to the MCCH and the service of interest, and/or MBMS-related SIBs), discontinues communication with the non-anchor carrier, e.g., without listening/receiving downlink signals on the non-anchor carrier, and/or without transmitting uplink signals, etc.

Further, before the terminal sends the MBMS service identification information of interest on the current carrier (anchor carrier or non-anchor carrier) (i.e., before step 41 b), it also determines whether to preferentially receive the multicast service or the unicast service. If the terminal has priority to multicast reception, the terminal sends an interested multicast service instruction to the network side, the network side executes step 42 after receiving the instruction, and meanwhile, the terminal also executes the related behaviors in step 42; and if the terminal has unicast reception priority, not sending interested multicast service indication to the network side.

It should be noted that the terminal sends the MBMS service identifier information of interest and the previous related service priority determination behavior on the anchor carrier or the non-anchor carrier, and is also applicable to the case where the terminal receives unicast and multicast on the anchor carrier, or the terminal receives unicast and multicast on the same non-anchor carrier. At this time, after receiving the interested multicast service indication reported by the terminal, the network side stops the unicast scheduling of the terminal during the interested multicast service transmission period of the terminal.

It should be further noted that the above method is also applicable to multicast services in SC-PTM method, except that SIB/multicast control channel/multicast service control channel of related multicast transmission and related multicast control channel update indication need to be adjusted accordingly.

In the third case: if the terminal resides in or works on the secondary carrier, and preferentially processes the reception and transmission of some key events on the secondary carrier, then, after the terminal receives the update prompt of the multicast control channel on the secondary carrier in the first embodiment of the present invention, the method further includes, after the terminal switches to a pre-configured primary carrier to receive the multicast service that the terminal is interested in:

step 16, when the terminal receives the multicast service which the terminal is interested in on the main carrier, if the network side needs to send or receive the preset key event on the auxiliary carrier configured for the terminal, the terminal suspends receiving the multicast service on the main carrier and switches to the auxiliary carrier to send or receive the preset key event.

That is, during the multicast service reception, if the terminal side overlaps with a critical event (such as paging) on the non-anchor carrier, the terminal side needs to suspend the reception on the anchor carrier, and preferentially receives or transmits the critical event on the non-anchor carrier.

Correspondingly, in the second embodiment of the present invention, after the multicast service is sent on the preconfigured primary carrier, the method further includes:

step 27, during the period that the network side sends the multicast service that the terminal is interested in on the main carrier, if the network side needs to send or receive the preset key event on the auxiliary carrier configured for the terminal, the network side stops the scheduling of the multicast service on the main carrier and schedules the preset key event on the auxiliary carrier.

Examples are as follows:

as shown in fig. 5, when the terminal resides in or operates on the secondary carrier and preferentially processes the reception and transmission of some critical events on the secondary carrier, the operations of the terminal side and the network side include:

it should be noted that, in this embodiment, the idle terminal resides in a non-anchor carrier for paging monitoring; or the connected UE transmits and receives data under the non-anchor carrier.

Step 51, the terminal side receives a PDCCH (physical downlink control channel) scrambled by a special RRC (radio resource control) message or an SC-N-RNTI (cell-radio network temporary identifier) on a non-anchor carrier wave to inform SC-MCCH (service center-control channel) updating;

step 52, since the network side may not know which UEs need to receive the SC-PTM service or what the SC-PTM service the UE is interested in, when the network side notifies the UE SC-MCCH update indication on the non-anchor, it is considered that any UE cannot be scheduled in general during the time when the anchor carrier broadcasts the SC-PTM (including receiving the SC-MCCH, all SC-MTCH transmissions, and/or SC-PTM related SIBs), but for some critical events, such as paging a terminal, the operation is prioritized, and the relevant operation does not need to be executed when the non-SC-PTM service transmission is waited;

correspondingly, at this time, after receiving the SC-MCCH update indication in step 51, the terminal switches the anchor carrier to receive the SC-PTM service, reads the updated SC-MCCH, and receives the SC-PTM service of interest. During the period, if important events on the non-anchor carrier need to be sent and received, for example, the terminal side needs to report some alarm reports on the non-anchor, or the transmission time corresponding to the SC-PTM is just overlapped with the paging monitoring time of the terminal on the non-anchor carrier, the terminal side preferentially processes the sending and/or receiving of the critical events on the non-anchor carrier, and the receiving of the SC-PTM on the anchor carrier is suspended.

In this embodiment, if the terminal side reports the specific SC-PTM service of interest, the network side and the terminal side may also switch the anchor carrier to perform SC-PTM service reception only during SC-MTCH transmission corresponding to the SC-MCCH and the service of interest and/or SIB transmission related to SC-PTM, but if there is a critical event, the critical event on the non-anchor carrier is still prioritized, and the process of the critical event is performed on the non-anchor carrier again for a while.

It should be further noted that the above method is also applicable to the multicast service in the MBMS method, except that the SIB for the related multicast transmission/the multicast control channel/the multicast service control channel and the related multicast control channel update indication need to be adjusted accordingly.

In summary, in the above embodiments of the present invention, after receiving the update prompt of the multicast control channel on the secondary carrier, the terminal actively switches from the secondary carrier to the primary carrier and receives the multicast service on the primary carrier; the invention provides a method for how a terminal working on an auxiliary carrier wave receives multicast service, the terminal can dynamically switch between a main carrier wave and the auxiliary carrier wave to receive the multicast service, and the multicast service is received while the load of the main carrier wave is reduced.

Third embodiment

As shown in fig. 6, a third embodiment of the present invention further provides an apparatus for receiving a multicast service, which is applied to a terminal side, and includes:

a configuration receiving module 61, configured to receive configuration of a network side, where a terminal works or resides on an auxiliary carrier configured by the network side;

and a service receiving module 62, configured to switch to a pre-configured primary carrier to receive the multicast service that the terminal is interested in after receiving the update prompt of the multicast control channel on the secondary carrier.

Specifically, in the third embodiment of the present invention, the service receiving module includes:

Specifically, the apparatus in the third embodiment of the present invention further includes:

Specifically, in a third embodiment of the present invention, the apparatus further includes:

In summary, in the apparatus for receiving a multicast service according to the third embodiment of the present invention, after receiving the update prompt of the multicast control channel on the secondary carrier, the terminal actively switches from the secondary carrier to the primary carrier and receives the multicast service on the primary carrier; the invention provides a method for how a terminal working on an auxiliary carrier wave receives multicast service, the terminal can dynamically switch between a main carrier wave and the auxiliary carrier wave to receive the multicast service, and the multicast service is received while the load of the main carrier wave is reduced.

It should be noted that the apparatus for receiving a multicast service according to the third embodiment of the present invention is an apparatus applying the above method for receiving a multicast service, and all embodiments of the above method for receiving a multicast service are applicable to the apparatus for receiving a multicast service, and can achieve the same or similar beneficial effects.

Fourth embodiment

In order to better achieve the above object, as shown in fig. 7, a fourth embodiment of the present invention further provides an apparatus for receiving a multicast service, including: a processor 100; a memory 120 connected to the processor 100 through a bus interface, and a transceiver 110 connected to the processor 100 through a bus interface; the memory is used for storing programs and data used by the processor in executing operations; receiving, by the transceiver 110, configuration of a network side, a multicast service in which a terminal is interested, and the like; when the processor calls and executes the programs and data stored in the memory, the following functional modules are implemented:

Where in fig. 7 the bus architecture may include any number of interconnected buses and bridges, with various circuits of one or more processors, represented by processor 100, and memory, represented by memory 120, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 110 may be a number of elements, including a transmitter and a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The processor 100 is responsible for managing the bus architecture and general processing, and the memory 120 may store data used by the processor 100 in performing operations.

The processor 100 is responsible for managing the bus architecture and general processing, and the memory 920 may store data used by the processor 100 in performing operations.

It should be noted that the apparatus for receiving a multicast service provided in the fourth embodiment of the present invention corresponds to the apparatus for receiving a multicast service provided in the third embodiment, so all embodiments of the method for receiving a multicast service provided in the first embodiment are applicable to the apparatus for receiving a multicast service, and can achieve the same or similar beneficial effects.

Fifth embodiment

In order to better achieve the above object, as shown in fig. 8, a fifth embodiment of the present invention further provides an apparatus for transmitting a multicast service, which is applied to a network side, and includes:

a configuration module 81, configured to configure an auxiliary carrier for a terminal, so that the terminal works or resides on the auxiliary carrier;

a prompt sending module 82, configured to send an update prompt of the multicast control channel to the terminal on the secondary carrier;

the service sending module 83 is configured to send a multicast service on a preconfigured host carrier, so that the terminal can switch to the host carrier to receive the multicast service that the terminal is interested in after receiving the update prompt of the multicast control channel.

Specifically, in a fifth embodiment of the present invention, the prompt sending module includes:

Specifically, the apparatus in the fifth embodiment of the present invention further includes:

In summary, in the apparatus for sending a multicast service according to the fifth embodiment of the present invention, after receiving the update prompt of the multicast control channel on the secondary carrier, the terminal actively switches from the secondary carrier to the primary carrier and receives the multicast service on the primary carrier; the invention provides a method for how a terminal working on an auxiliary carrier wave receives multicast service, the terminal can dynamically switch between a main carrier wave and the auxiliary carrier wave to receive the multicast service, and the multicast service is received while the load of the main carrier wave is reduced.

It should be noted that, the apparatus for sending a multicast service according to the fifth embodiment of the present invention is an apparatus applying the method for sending a multicast service, and all embodiments of the method for sending a multicast service are applicable to the apparatus for sending a multicast service, and can achieve the same or similar beneficial effects.

Sixth embodiment

In order to better achieve the above object, as shown in fig. 7, a sixth embodiment of the present invention further provides an apparatus for transmitting a multicast service, including: a processor 100; a memory 120 connected to the processor 100 through a bus interface, and a transceiver 110 connected to the processor 100 through a bus interface; the memory is used for storing programs and data used by the processor in executing operations; transmitting configuration of a network side, multicast service in which a terminal is interested, and the like through the transceiver 110; when the processor calls and executes the programs and data stored in the memory, the following functional modules are implemented:

It should be noted that the apparatus for transmitting a multicast service according to the sixth embodiment of the present invention corresponds to the apparatus for transmitting a multicast service according to the fifth embodiment, so that all the embodiments of the method for transmitting a multicast service according to the second embodiment are applicable to the apparatus for transmitting a multicast service, and can achieve the same or similar beneficial effects.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A method for receiving multicast service, applied to a terminal side, comprising:

after the terminal receives the update prompt of the multicast control channel on the auxiliary carrier, the terminal switches to a pre-configured main carrier to receive the multicast service interested by the terminal;

after the terminal receives the update prompt of the multicast control channel on the secondary carrier, and the terminal switches to a pre-configured primary carrier to receive the multicast service interested by the terminal, the method further comprises the following steps:

when a terminal receives a multicast service which the terminal is interested in on a main carrier, if a network side needs to send or receive a preset key event on an auxiliary carrier configured for the terminal, the terminal suspends receiving the multicast service on the main carrier and switches to the auxiliary carrier to send or receive the preset key event;

the step that the terminal receives the update prompt of the multicast control channel on the auxiliary carrier wave comprises the following steps:

2. The method according to claim 1, wherein the step of switching, by the terminal, to receive the multicast service of interest to the terminal on the pre-configured primary carrier after the terminal receives the update notification of the multicast control channel on the secondary carrier comprises:

3. The method according to claim 1, wherein the step of switching, by the terminal, to receive the multicast service of interest to the terminal on the pre-configured primary carrier after the terminal receives the update notification of the multicast control channel on the secondary carrier comprises:

4. The method of claim 1, wherein before the terminal switches to a pre-configured primary carrier to receive the multicast service of interest to the terminal, the method further comprises:

5. The method according to claim 4, wherein before the terminal reports the identifier of the multicast service in which the terminal is interested to the network side, the method further comprises:

6. The method according to claim 4 or 5, wherein when a terminal reports an identifier of a multicast service that the terminal is interested in to a network side, and after the terminal receives an update notification of a multicast control channel on the secondary carrier, the terminal switches to a pre-configured primary carrier to receive the multicast service that the terminal is interested in, and the method comprises the steps of:

7. The method according to claim 4 or 5, wherein after the terminal reports the identifier of the multicast service in which the terminal is interested to the network side, the method further comprises:

8. A method for sending multicast service is applied to a network side, and is characterized by comprising the following steps:

sending a multicast service on a pre-configured main carrier, so that a terminal can switch to the main carrier to receive the multicast service which is interested by the terminal after receiving an update prompt of a multicast control channel;

after the multicast service is sent on the preconfigured primary carrier, the method further includes:

during the period that a network side sends a multicast service which is interested by a terminal on a main carrier, if the network side needs to send or receive a preset key event on an auxiliary carrier configured for the terminal, the network side stops the scheduling of the multicast service on the main carrier and schedules the preset key event on the auxiliary carrier;

the step of sending an update prompt of the multicast control channel to the terminal on the secondary carrier includes:

9. The method of claim 8, wherein during the sending of multicast traffic on the preconfigured primary carrier, the method further comprises:

10. The method of claim 8, wherein before transmitting multicast traffic on a preconfigured primary carrier, the method further comprises:

11. The method of claim 10, wherein after receiving an identification of a multicast service that is reported by a terminal and is of interest to the terminal, the method further comprises:

12. The method of claim 10, wherein after receiving an identification of a multicast service that is reported by a terminal and is of interest to the terminal, the method further comprises:

13. An apparatus for receiving a multicast service, applied to a terminal side, comprising:

the service receiving module is used for switching to a pre-configured main carrier to receive the multicast service interested by the terminal after receiving the update prompt of the multicast control channel on the auxiliary carrier;

the device further comprises:

the key event processing module is used for suspending the multicast service reception on the main carrier and switching to the auxiliary carrier to transmit or receive the preset key event if the network side needs to transmit or receive the preset key event on the auxiliary carrier configured for the terminal during the period that the terminal receives the multicast service which is interested by the terminal on the main carrier;

14. The apparatus of claim 13, wherein the traffic receiving module comprises:

15. The apparatus of claim 13, wherein the traffic receiving module comprises:

16. The apparatus of claim 13, further comprising:

and the identifier reporting module is used for reporting the identifier of the multicast service which is interested by the terminal to a network side.

17. The apparatus of claim 16, further comprising:

18. The apparatus of claim 16 or 17, wherein the traffic receiving module comprises:

19. The apparatus of claim 16 or 17, further comprising:

20. An apparatus for transmitting multicast service, applied to a network side, includes:

the service sending module is used for sending the multicast service on a pre-configured main carrier, so that the terminal can switch to the main carrier to receive the multicast service which is interested by the terminal after receiving the update prompt of the multicast control channel;

the system comprises a key event scheduling module, a main carrier and a network side, wherein the key event scheduling module is used for stopping the scheduling of the multicast service on the main carrier and scheduling the preset key event on an auxiliary carrier if the network side needs to send or receive the preset key event on the auxiliary carrier configured for the terminal during the period that the network side sends the multicast service which is interested by the terminal on the main carrier;

the prompt sending module comprises:

21. The apparatus of claim 20, further comprising:

22. The apparatus of claim 20, further comprising:

23. The apparatus of claim 22, further comprising:

24. The apparatus of claim 22, further comprising: