WO2018082076A1

WO2018082076A1 - Multicast communication method, network equipment, user equipment and system

Info

Publication number: WO2018082076A1
Application number: PCT/CN2016/104794
Authority: WO
Inventors: 陈力; 王宏; 李秉肇
Original assignee: 华为技术有限公司
Priority date: 2016-11-04
Filing date: 2016-11-04
Publication date: 2018-05-11
Also published as: CN109155902A

Abstract

Disclosed in an embodiment of the present invention are a multicast communication method, network equipment, user equipment, and a system. The method comprises: the network equipment sends a plurality of multicast control information to the user equipment; the network equipment sends indication information to the user equipment, wherein the indication information is used to indicate that at least one of the plurality of multicast control information is changed, the multicast control information being borne on a multicast control channel; the network equipment sends at least one piece of changed multicast control information on the basis of the indication information; and the network device transmits at least one multicast communication service data corresponding to the at least one multicast control information to the user equipment. The above method reduces power consumption of UE and radio resource consumption of eNB in the multicast communication by designing a plurality of multicast control channels (for example, SC-MCCH).

Description

Multicast communication method, network device, user equipment and system

Technical field

The present invention relates to the field of communications, and in particular, to a multicast communication method, a base station, a user equipment, and a system.

Background technique

In order to meet the needs of IoT devices, people introduced Machine Type Communications (MTC) based on Long Term Evolution (LTE) communication. LTE-MTC is a low-power wide-area network (Low- Power Wide Area Network (LPWAN), which is different from traditional LTE communication, does not pursue data transmission rate, multi-band, multi-antenna, full-duplex transmission, but pursues longer terminal device battery time, lower-cost terminal device The cost, that is, the terminal is required to achieve low power consumption and low cost.

In the LTE-MTC communication, the user equipment (User Equipment, UE) is in a different wireless environment, that is, some UEs have poor signal environments, and some UEs have good signal environments. When the UE signal environment is poor, since the UE signal coverage cannot meet the signal acceptance requirement, the MTC needs to be enhanced, so that the evolved Node B (eNB) and the UE can support the Coverage Enhancement (CE). The main method for implementing extended coverage is that the Physical Downlink Control Channel (PDCCH) of the eNB is repeatedly transmitted multiple times. According to the scheduling of the PDCCH, the physical downlink shared channel (PDSCH) of the eNB is also The transmission may be repeated multiple times, which is called a high enhanced coverage level, for example, CE level 3. The UE achieves the purpose of improving the data reception success rate by receiving and combining multiple times. When the UE signal environment is good, there is no need to extend coverage, that is, no It is necessary to repeat the transmission multiple times, which is called a Low enhanced coverage level, such as CE level 0. Currently, eMTC (Enhanced Machine Type Communications) supports four levels of enhanced coverage: CE level 0, CE level 1, CE level 2, and CE level 3. CE level 0 is the coverage that is not enhanced, that is, normal coverage. CE level 3 indicates the highest enhanced coverage, which means that the number of repeated transmissions is the most.

Considering that the current LTE-MTC communication only supports unicast communication, when a large number of UEs connect to the eNB at the same time, it will occupy a large amount of network resources, which in turn affects the entire communication system. Therefore, in the prior art, single-cell point-to-multiple The Single Cell Point to Multi-point (SC-PTM) multicast communication technology is introduced into the LTE-MTC, and the SC-PTM can implement the purpose of the eNB transmitting the same service data to multiple UEs in a single cell, without requiring the UE. Establish connections, reduce resource usage, and reduce network burden.

However, since it is in the existing SC-PTM, the single cell multicast traffic channel (English: Single Cell Multi-cast Traffic Channel, SC-MTCH) is controlled in the existing SC-PTM. There is only one cell-multicast control channel (English: Single Cell Multi-cast Control Channel, SC-MCCH), that is, all SC-MTCHs are controlled by one SC-MCCH. If different SC-MTCHs have different enhanced coverage levels, different SC-MTCHs can be configured in the SC-MCCH to use different Repetition Numbers. For example, an electric meter and a water meter are generally deployed in a basement or a wall, and the signal of the receiving base station is poor. When transmitting data such as software upgrades for such a device, a higher enhanced coverage level can be configured, that is, a larger number of repeated transmissions is used; For devices that are generally deployed on the ground, such as street lights, the signals are strong. When sending data such as software upgrades for such devices, you can configure the use of smaller repeated transmission resources. This can reduce resource consumption. For the SC-MCCH, if only one SC-MCCH is used, when the SC-MCCH is sent, the device covering the edge of the base station needs to be covered, that is, the number of repeated transmissions is used, which increases the radio resource consumption. For devices with lower coverage levels, such as street lights, there is no need to use a large number of repeated transmissions. If multiple SC-MCCHs are introduced, the same or similar coverage level The SC-MTCH is configured by the same SC-MCCH, and the SC-MCCHs of different coverage levels are configured by another SC-MCCH, which can reduce the number of repeated transmissions of a part of the SC-MCCH, and can reduce the radio resource consumption. Therefore, when there is a change information (such as new service information, software upgrade information, etc.) that needs to be notified to the UE, the SC-MCCH needs the highest enhanced coverage level, so that the UE in all signal environments can receive the SC-MCCH. That is to say, for a UE with a good signal environment, it is still necessary to receive the most number of SC-MCCHs, which consumes a large amount of power of the UE. For the eNB, the SC-MCCH needs to be transmitted the most, which consumes a large amount of network resources.

In addition, in the prior art, the update of the SC-MCCH is notified to the UE by modifying the notification, the SC-MCCH remains unchanged in a Modification Period (MP), and the SC-MCCH is in a repetition period (RP). ) Perform periodic transmissions. During a modification period, the UE only needs to read the SC-MCCH once, which can reduce the power consumption of the UE. If the repetition period is short, the delay for the UE to acquire the SC-MCCH can be reduced. If multiple SC-MCCHs are introduced, how to notify the SC-MCCH of the update needs to be redesigned to reduce the power consumption and radio resource consumption of the UE.

In addition, in the prior art, semi-persistent scheduling (English: Semi-Persistence Scheduling, SPS for short), after the base station activates semi-persistent scheduling, the user equipment (English: User Equipment, UE for short) periodically uses semi-persistent scheduling. The information is used to send uplink data or receive downlink data. In addition, the user equipment needs to monitor the physical downlink control channel (English: Physical Downlink Control Channel, PDCCH for short) to obtain dynamic scheduling information sent by the base station or semi-statically scheduled reactivation information or half. Statically scheduled deactivation information. However, in some application scenarios, such as multicast services, if the base station does not send dynamic scheduling information, and the semi-static scheduling information has a long effective time, and the user equipment always monitors the PDCCH, the power consumption of the user equipment is increased.

Summary of the invention

Embodiments of the present invention provide a multicast communication method, a network device, a user equipment, and a system. A plurality of control channels are designed to reduce power consumption and eNB radio resource consumption of the UE in the prior art, and a semi-persistent scheduling communication method and apparatus are provided for reducing power consumption of the UE in the prior art.

In a first aspect, a multicast communication method is provided, which is applied to a network device side, and includes:

The network device sends multiple multicast control information to the user equipment;

The network device sends the indication information to the user equipment, where the indication information is used to indicate that at least one of the multiple multicast control information is changed, and the multicast control information is carried on the multicast control channel;

Transmitting, by the network device, the changed at least one multicast control information to the user equipment according to the indication information;

The network device sends at least one multicast communication service data corresponding to the at least one multicast control information to the user equipment.

In a second aspect, a multicast communication method is provided, which is applied to a user equipment side, and includes:

The user equipment receives multiple multicast control information sent by the network device;

The user equipment receives the indication information sent by the network device, where the indication information is used to indicate that at least one of the multiple multicast control information is changed, and the multicast control information is carried on the multicast control channel;

Receiving, by the user equipment, the changed at least one multicast control information that is sent by the network device according to the indication information;

The user equipment receives at least one multicast communication service data corresponding to the at least one multicast control information.

The foregoing first aspect and the foregoing second aspect describe a multicast communication method provided by an embodiment of the present invention from a network device side and a user equipment side respectively. By implementing the method, multiple multicast control channels are designed to reduce network equipment. Radio resource consumption and power consumption of user equipment.

With reference to the first aspect or the second aspect, in some possible implementation manners, the network device is The indication information sent by the user equipment is specifically at least one of the following:

Sending, by the network device, the indication information to the user equipment by using a paging message;

Transmitting, by the network device, the indication information to the user equipment by using a physical downlink control channel of one or more multicast control channels;

The network device sends the indication information to the user equipment over a physical downlink control channel of one or more multicast traffic channels.

With reference to the first aspect or the second aspect, in some possible implementations, the method further includes:

The network device sends the configuration information of the multicast control channel to the user equipment, where the configuration information is carried in a system message, where the configuration information includes at least one of the following:

Narrowband information, the narrowband information is used to indicate sending a narrowband of the multicast control channel, and the narrowband is in one-to-one correspondence with the multicast control channel;

Time information, the time information is used to indicate a time when the multicast control channel is sent, and the time is in one-to-one correspondence with the multicast control channel.

With reference to the first aspect or the second aspect, in some possible implementations, the network device sends configuration information of the multicast control channel to the user equipment, where the configuration information further includes at least one of the following:

Covering level information, the coverage level information is used to indicate a number of times of repeatedly transmitting the multicast control channel or the physical downlink control channel of the multicast control channel, the coverage level information and the multicast control channel or the One-to-one correspondence of physical downlink control channels of the multicast control channel;

Service information, where the service information is used to indicate an identifier of a service configured by the multicast control channel, where the service information is in one-to-one correspondence with the multicast control channel;

a wireless network temporary identifier, the wireless network temporary identifier is used to scramble a physical downlink control channel of the multicast control channel, and the wireless network temporary identifier is in one-to-one correspondence with the multicast control channel.

With reference to the first aspect or the second aspect, in some possible implementation manners, the wireless network temporarily The number of identifiers can be multiple;

When the number of the temporary identifiers of the wireless network is multiple, the multiple physical downlink control channels of the multiple multicast control channels are in one-to-one correspondence with the temporary identifiers of the wireless network.

With reference to the first aspect or the second aspect, in some possible implementations, the number of the wireless network temporary identifiers may be one, and when the number of the wireless network temporary identifiers is one, the multiple multicast control channels A plurality of physical downlink control channels are scrambled using the wireless network temporary identity.

With reference to the first aspect or the second aspect, in some possible implementations, the indication information further includes bitmap information, where the bitmap information includes n bits, where the n bits are used to indicate corresponding n Whether the broadcast control information has changed, and n is a positive integer greater than one.

In a third aspect, a network device is provided, comprising: a transmitter, a memory, and a processor coupled to the memory, wherein the transmitter is configured to transmit information to the outside, the memory being used to store the first aspect Implementation code of a method for executing program code stored in the memory, ie performing the method described in the first aspect.

In a fourth aspect, a user equipment is provided, comprising: a receiver, a memory, and a processor coupled to the memory, wherein the receiver is configured to receive externally transmitted information, the memory for storing a second aspect description Implementation code of a method for executing program code stored in the memory, ie performing the method described in the second aspect.

A fifth aspect, a network device, including a unit for performing the method described in the first aspect, includes:

a first sending unit, configured to send a plurality of multicast control information to the user equipment, where the first sending unit is further configured to send, to the user equipment, indication information, where the indication information is used to indicate the multiple multicast control information At least one of the changes is performed, and the multicast control information is carried on a multicast control channel;

a second sending unit, configured to send the changed multicast control information to the user equipment based on the indication information;

And a third sending unit, configured to send multicast communication service data to the user equipment based on the multicast control information.

According to a sixth aspect, a user equipment, including a unit for performing the method described in the second aspect, includes:

a first receiving unit, configured to receive multiple multicast control information sent by the network device, where the first receiving unit is further configured to receive indication information sent by the network device, where the indication information is used to indicate the multiple multicasts At least one of the control information is changed, and the multicast control information is carried on the multicast control channel;

a second receiving unit, configured to receive the changed multicast control information that is sent by the network device based on the indication information;

And a third receiving unit, configured to receive the multicast communication service data based on the changed multicast control information.

In a seventh aspect, a communication system is provided, including: a network device and a user equipment, where:

The network device may be the network device described in the foregoing third aspect; the user device may be the user device described in the foregoing fourth aspect.

The network device may also be the network device described in the foregoing fifth aspect; the user device may also be the user device described in the foregoing fifth aspect.

In an eighth aspect, a storage medium is provided for storing an implementation code of the method of the first aspect described above.

In a ninth aspect, a storage medium is provided for storing an implementation code of the method of the second aspect described above.

In an embodiment of the present invention, when a user equipment (such as an Internet of Things device) needs to receive service data (such as software upgrade data), the network device (such as a base station) sends indication information to the user equipment for indicating one or more to the user equipment. a change of multicast control information, the multicast control information being carried on a multicast control channel, that is, corresponding to multicast control information, the number of the multicast control channels being one or more Then, the network device sends the changed multicast control information to the user equipment, and the user equipment receives the multicast communication service data based on the multicast control information. That is, by implementing the embodiments of the present invention, multiple multicast control channels (such as multiple SC-MCCHs) can be configured to schedule one or more multicast communication service data (such as software upgrade data), and the user equipment is configured according to relevant The scheduling may be based on the requirements of the user equipment to receive corresponding communication service data, thereby reducing power consumption of the user equipment and reducing wireless resource consumption of the network device.

A tenth aspect provides a semi-persistent scheduling communication method, including:

The network device sends the configuration information of the semi-static scheduling (SPS) information to the UE, where the configuration information includes a modification period of the SPS information, and the network device sends the first physical downlink control channel to the user equipment according to the modification period. a PDCCH), the first PDCCH includes the SPS information; the network device communicates with the user equipment according to the SPS information.

In a first implementation manner of the tenth aspect, the configuration information further includes a first offset, where the first offset is used to determine a time when the first PDCCH is sent;

And the sending, by the network device, the first PDCCH to the user equipment according to the modification period, further includes:

The network device sends the first PDCCH to the user equipment according to the modification period and the first offset.

The first embodiment of the tenth aspect, in the second implementation of the tenth aspect, the network device sends a second PDCCH to the user equipment, where the second PDCCH includes the first An SPS information and a first indication information, where the first indication information is used to indicate a time difference between sending the second PDCCH and sending the first PDCCH.

According to the tenth aspect, in a third implementation manner of the tenth aspect, the sending, by the network device, the first PDCCH to the user equipment according to the modification period includes:

The network device sends the first PDCCH to the user equipment at a time corresponding to a system frame number that the system frame number is modulo to zero in the modification period;

or,

The network device sends the first PDCCH to the user equipment at a time corresponding to a subframe number indicated by a system frame number and a system subframe number to a subframe number that is modulo zero.

According to a first implementation manner of the tenth aspect, in a fourth implementation manner of the tenth aspect, the network device sends the first to the user equipment according to the modification period and the first offset PDCCH, including:

The network device sends the first PDCCH to the user equipment at a time when the system frame number is modulo to the system frame number of the first offset.

or,

The network device sends the first PDCCH to the user equipment at a time when the system frame number and the subframe number indicated by the system subframe number are corresponding to the subframe number of the first offset.

In an eleventh aspect, a communication method for semi-persistent scheduling is provided, including:

The user equipment UE receives configuration information of semi-persistent scheduling (SPS) information sent by the network device, where the configuration information includes a modification period of the SPS information;

Receiving, by the user equipment, a first physical downlink control channel (first PDCCH) sent by the network device according to the modification period, where the first PDCCH includes first SPS information;

The user equipment communicates with the network device according to the SPS information.

In a first implementation manner of the eleventh aspect, the configuration information further includes a first offset, where the first offset is used to determine a time when the first PDCCH is received;

And the receiving, by the user equipment, the first PDCCH sent by the network device according to the modification period, further includes:

The user equipment receives the first PDCCH sent by the network device according to the modification period and the first offset.

According to the first embodiment of the eleventh or eleventh aspect, in a second implementation manner of the second aspect, the user equipment receives a second PDCCH that is sent by the network device, and the second The PDCCH includes the first SPS information and the first indication information, where the first indication information is used to indicate a time difference between sending the second PDCCH and sending the first PDCCH, where the time difference indicates the first PDCCH first The time after or after the second PDCCH is transmitted.

In a third implementation manner of the eleventh aspect, the user equipment, according to the modification period, receiving the first PDCCH sent by the network device, includes:

The user equipment receives the first PDCCH sent by the network device at a time corresponding to a system frame number that the system frame number is modulo to zero in the modification period;

or,

The user equipment receives the first PDCCH sent by the network device at a time corresponding to a subframe number indicated by a system frame number and a system subframe number to a subframe number that is modulo zero.

According to a first implementation manner of the eleventh aspect, in a fourth implementation manner of the eleventh aspect, the user equipment, according to the modification period and the first offset, The first PDCCH includes:

Receiving, by the user equipment, the first PDCCH that is sent by the network device, when the system frame number is corresponding to the system frame number of the first offset;

or,

The user equipment receives the first part sent by the network device at a time when the system frame number and the subframe number indicated by the system subframe number are corresponding to the subframe number of the first period offset. A PDCCH.

According to a second embodiment of the eleventh aspect, in a fifth implementation manner of the eleventh aspect, the method includes:

The receiving, by the user equipment, the first PDCCH according to the time difference, when the user equipment receives the second PDCCH, includes:

When the time difference indicates that the first PDCCH is earlier than the second PDCCH, the user equipment receives the next first PDCCH at the first moment, and the first moment lags behind Receiving, by the second PDCCH, the modification period minus a time of the time difference;

or,

When the time difference indicates the time when the first PDCCH is sent by the second PDCCH, the user equipment hits a first PDCCH at a second moment, and the second moment lags behind receiving the second PDCCH. Time of the time difference of the PDCCH time.

According to a twelfth aspect, a network device is provided, including:

a sending unit, configured to send configuration information of semi-persistent scheduling (SPS) information to the UE, where the configuration information includes a modification period of the SPS information, and the sending unit is further configured to send the first to the UE according to the modification period. a physical downlink control channel (first PDCCH), the first PDCCH includes the SPS information, and a processing unit, configured to communicate with the UE according to the SPS information.

In a twelfth aspect, in a first implementation manner of the twelfth aspect, the configuration information further includes a first offset, where the first offset is used to determine a time when the first PDCCH is sent;

The sending unit is further configured to send the first PDCCH to the user equipment according to the modification period, and further includes:

The sending unit is configured to send the first PDCCH to the user equipment according to the modification period and the first offset.

In a second implementation manner of the twelfth aspect or the twelfth aspect, in the second implementation of the twelfth aspect, the sending unit is further configured to send, by the user equipment, a second PDCCH, where The second PDCCH includes the first SPS information and the first indication information, where the first indication information is used to indicate a time difference between sending the second PDCCH and sending the first PDCCH.

According to a twelfth aspect, in a third implementation of the twelfth aspect, the sending unit is further configured to send the first PDCCH to the UE according to the modification period, including:

The sending unit is configured to send the first PDCCH to the user equipment at a time corresponding to a system frame number that the system frame number is modulo to zero in the modification period;

Or,

The sending unit is configured to send the first PDCCH to the user equipment at a time corresponding to a subframe number indicated by a system frame number and a system subframe number to a subframe number that is modulo zero.

According to a first implementation manner of the twelfth aspect, in a fourth aspect of the third aspect, the sending unit, configured to send, to the user equipment, according to the modification period and the first offset A PDCCH, including:

The sending unit is configured to send the first PDCCH to the user equipment at a time corresponding to a system frame number that is modulo the first offset by the system frame number;

or,

The sending unit is configured to send, to the user equipment, the first time that the system frame number and the subframe number represented by the system subframe number are corresponding to the subframe number of the first offset A PDCCH.

In a thirteenth aspect, a user equipment UE is provided, including:

a receiving unit, configured to receive configuration information of semi-static scheduling (SPS) information sent by the network device, where the configuration information includes a modification period of the SPS information, and the receiving unit is further configured to receive the network device according to the modification period Transmitting a first physical downlink control channel (first PDCCH), where the first PDCCH includes first SPS information;

And a processing unit, configured to communicate with the network device according to the SPS information.

In a first implementation manner of the thirteenth aspect, the configuration information further includes a first offset, where the first offset is used to determine a time when the first PDCCH is received;

The receiving unit is further configured to receive the first PDCCH that is sent by the network device according to the modification period, and further includes:

The receiving unit is configured to receive the first PDCCH sent by the network device according to the modification period and the first offset.

In a second implementation manner of the thirteenth aspect, the receiving unit is further configured to receive the second PDCCH that is sent by the network device, in the second implementation manner of the thirteenth aspect, The second PDCCH includes the first SPS information and the first indication information, where the first indication information is used to indicate a time difference between sending the second PDCCH and sending the first PDCCH, where the time difference indicates the The first PDCCH is preceded or followed by the time when the second PDCCH is transmitted.

According to the thirteenth aspect, the receiving unit, in the third implementation manner of the thirteenth aspect, is further configured to receive the first PDCCH sent by the network device according to the modification period, including:

The receiving unit, configured to receive the first PDCCH sent by the network device at a time corresponding to a system frame number that the system frame number is modulo to zero in the modification period;

or,

The receiving unit is configured to receive the first PDCCH sent by the network device at a time corresponding to a subframe number that is represented by a system frame number and a system subframe number that is modulo zero to the modification period.

The receiving unit is configured to receive the network according to the modification period and the first offset according to the first implementation manner of the thirteenth aspect, The first PDCCH sent by the device includes:

The receiving unit is configured to receive, by the network device, the first PDCCH that is sent by the network device, where the system frame number is modulo to the system frame number of the first offset;

or,

The receiving unit is configured to receive, when the subframe number represented by the system frame number and the system subframe number is corresponding to the subframe number that is modulo the first offset by the modification period, The first PDCCH.

According to a second implementation manner of the thirteenth aspect, in a fifth implementation manner of the thirteenth aspect, the receiving unit is further configured to: when the receiving unit receives the second PDCCH, according to the Receiving the first PDCCH by a time difference includes:

The receiving unit is configured to: when the time difference indicates that the first PDCCH is sent before the second PDCCH, receive a next first PDCCH at a first time, where the first time lags behind receiving the first PDCCH Determining, by the second PDCCH, the modification period minus the time of the time difference;

or,

The receiving unit is configured to receive a next first PDCCH at a second time when the time difference indicates the time when the first PDCCH is sent by the second PDCCH, where the second time lags behind receiving The time of the time difference of the second PDCCH moment.

The semi-persistent scheduling communication method and apparatus provided by the embodiments of the present invention enable the network device to send SPS information to the UE according to the modification period of the SPS information, and reduce the power consumption of the UE to monitor the PDCCH.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

1 is a schematic diagram of a process in which an eNB sends communication service data to a UE;

2 is a schematic diagram of a multicast communication system according to an embodiment of the present invention;

3 is a schematic flowchart of a multicast communication method according to an embodiment of the present invention;

4 is a schematic flowchart of a network device sending a system message to a user equipment according to an embodiment of the present invention;

5A-5E are schematic diagrams of a process for a network device to send indication information to a user equipment according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a SC-MCCH mapping transmission time according to an embodiment of the present invention; FIG.

FIG. 7 is a schematic diagram of multiple user equipments selecting to receive appropriate multicast communication service data based on configuration information according to an embodiment of the present invention; FIG.

FIG. 8 is a schematic structural diagram of a network device according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of a user equipment according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a network device according to an embodiment of the present disclosure;

FIG. 11 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Considering that LTE-MTC communication only supports unicast communication, a large number of UEs will occupy a large amount of network resources when they connect to the eNB at the same time, which in turn affects the entire communication system. Therefore, in the prior art, SC-PTM multicast communication technology is adopted. Introduced into the LTE-MTC, the SC-PTM can implement the purpose of the eNB transmitting the same service data to multiple terminals in a single cell, and does not require the UE to establish a connection.

In the SC-PTM, the channel on which the eNB transmits traffic is SC-MTCH, and one service corresponds to one SC-MTCH, and different services may have different enhanced coverage levels. The SC-MCCH is controlled by the SC-MCCH, the SC-MCCH and the SC-MTCH are mapped to the PDSCH, and the PDSCH is controlled by the PDCCH, that is, the eNB can schedule the service data to the UE through the PDCCH.

Referring to FIG. 1 and FIG. 2, FIG. 1 shows a situation in which the eNB sends communication service data to the UE in the prior art. For example, the eNB needs to send a software upgrade package to the UE, and then the software upgrade package is not sent to the software upgrade package. The process of change is a change in business data. The change of the service data may cause the configuration service data, that is, the change of the SC-MCCH of the SC-MTCH. As described in the background art, the change of the SC-MCCH needs to be notified to the UE, and the notification is generally called a change notification. Notifications usually occur during the modification period (English: Modification Period, Jane The boundary of the MP) is shown in Figure 1. The SC-MCCH MP1 is the modification period before the SC-MCCH modification, and the SC-MCCH MP2 is the modified modification period of the SC-MCCH. The repetition period RP can include multiple A radio frame (English: Radio Frame, RF for short) or a wireless sub-frame (Subframe) may have, for example, 16 RFs.

In the SC-MCCH MP1, the SC-MCCH content is the same. Since the SC-MCCH is mapped to the PDSCH, the PDSCH is controlled by the PDCCH, and the PDCCH is scrambled by the SC-RNTI (Single Cell Radio Network Temporary Identity, RNTI for short). When the UE detects the SC-RNTI scrambled PDCCH, the UE may receive the SC-MCCH according to the PDCCH. In one MP, the UE only needs to receive the SC-MCCH once.

In SC-MCCH MP2, the SC-MCCH is changed. At the start time of MP2, the base station notifies the change of the SC-MCCH of the UE by transmitting the PDCCH scrambled by the SC-N-RNTI, and the SC-N-RNTI is scrambled. The PDCCH is a modification notification. When the UE receives the modification notification, the UE starts to receive the SC-MCCH, and checks whether there is a new service SC-MTCH added. In this process, as shown in FIG. 2, if there are two UEs in a single cell: UE1 and UE2, UE1 and UE2 are interested in service 1 and service 2, respectively, but UE1 has a good signal environment and receives 8 SC- The MCCH or SC-MTCH can obtain the SC-MCCH or the SC-MTCH. The signal environment of the UE2 is poor. If the SC-MCCH or SC-MTCH is received 128 times, the SC-MCCH or SC-MTCH can be obtained. If there is only one SC-MCCH, In order for both UE1 and UE2 to receive the SC-MCCH information, the SC-MCCH needs to have the highest enhanced coverage level, that is, the eNB sends the maximum number of SC-MCCHs (128 times). In this way, for the eNB, the information of the configuration service 1 is also sent 128 times in a single SC-MCCH, and for such UEs, the UE receives the UE with less repeated transmission times, thus causing a large number of network resources. Waste. Among them, UE1 represents a class of UEs interested in service 1, and such UEs have better signal coverage, such as street lights, wristbands, etc., UE2 represents a class of UEs interested in service 2, and such UEs have poor signal coverage. , such as water meters in the basement, electricity Table and so on.

The present invention provides a multicast communication method, a network device, a user equipment, and a system, in order to reduce the power consumption of the UE in the prior art and the eNB by designing multiple multicast control channels. Wireless resource consumption. The details are described below separately.

Referring to FIG. 3, FIG. 3 is a schematic flowchart of a multicast communication method according to an embodiment of the present invention. As shown in FIG. 3, the method includes:

S101: The network device sends configuration information of one or more multicast control channels to the user equipment. Correspondingly, the user equipment receives configuration information of one or more of the multicast control channels sent by the network device.

The network device may be a base station. Specifically, the network device may be an evolved Node B (eNB), and the eNBs are connected through an X2 interface, where the eNB is a user equipment in the LTE and an evolved core network ( Base station between Evolved Packet Core, EPC). User equipment (UE) can be a mobile phone, a tablet computer, a wearable device, an in-vehicle device, a multimedia device, a streaming media device, an Internet of Things device, and a terminal device in a 4G/5G network, a smart meter, a smart water meter, and the like. The network device and the user equipment may also be other types of transceivers, which are not limited herein.

In the embodiment of the present invention, the multicast control channel may be a single cell multicast control channel in a single cell point to multi-point (SC-PTM) system (Single Cell Multi-cast Control Channel) , SC-MCCH), may also be a Multicast Control Channel (MCCH) in a Multimedia Broadcast Multicast Service (MBMS), and may also be in other multicast systems. The multicast control channel is not specifically limited in the present invention. For the sake of simplicity, the following describes the SC-MCCH as an example of a multicast control channel.

In the embodiment of the present invention, the configuration information is carried in a system message of a system information block (SIB), that is, the eNB sends a system message to the UE, where the system message is used to configure the SC-MCCH. Configuration information. In a specific embodiment, the system message is taken as an example of the SIB20. Referring to FIG. 4, the configuration information includes at least one of the following: a repetition period (RP) of the SC-MCCH and an offset (sc-mcch-). Offset), SC-MCCH transmission time (sc-mcch-duration), modification period (MP), narrowband information, time information, coverage level information, service information, and wireless network temporary identification.

In some possible embodiments, the narrowband information is used to indicate a narrowband that sends the multicast control channel, and the narrowband corresponds to the multicast control channel one-to-one, meaning that a certain multicast control information is specifically Which narrowband is transmitted, so that the UE receives the multicast control information on the corresponding narrowband according to the narrowband information, that is, the SC-MCCH forms a mapping relationship with the narrowband (Narrow Band). In a specific embodiment, as shown in FIG. 5C As shown, the plurality of multicast control channels are, for example, SC-MCCH1, SC-MCCH2, SC-MCCH3, wherein SC-MCCH1 is transmitted on Narrow Band1, SC-MCCH2 is transmitted on Narrow Band2, and SC-MCCH3 is Sent on Narrow Band3, that is, different SC-MCCHs are sent on different Narrow Bands. It can be understood that in other specific embodiments, different SC-MCCHs may all be sent on the same narrowband, for example, SC-MCCH1, SC-MCCH2 and SC-MCCH3 are all transmitted on Narrow Band1.

In some possible embodiments, the time information is used to indicate a time when the multicast control channel is sent, where the time corresponds to the multicast control channel, meaning that a certain multicast control information is specifically Which time is sent, so that the UE receives the multicast control information according to the time information at the corresponding time, that is, different SC-MCCHs are transmitted on different Narrow Bands, but are sent at different times, that is, SC-MCCH The mapping relationship with the sending time. In a specific embodiment, as shown in FIG. 6, different SC-MCCHs use the same repetition period RP, but the start time is different, that is, the offset (Offset) is different, and multiple SC-MCCHs are respectively SC-MCCH1. , SC-MCCH2, then SC-MCCH1 corresponds to Offset1, SC-MCCH2 corresponds to Offset2, and Offset1 is different from Offset2. It can be understood that in other specific embodiments, Offset1 can be the same as Offset2, that is, different SC-MCCHs can also correspond to the same transmission time.

In some possible embodiments, the coverage level information is used to indicate a number of times of repeatedly transmitting a physical downlink control channel (PDCCH) of the multicast control channel or the multicast control channel, and the coverage level information is The one-to-one correspondence between the multicast control channel or the physical downlink control channel of the multicast control channel refers to which coverage level is specifically used by the physical downlink control channel of a certain multicast control channel or a multicast control channel, or specifically used. Which Repetition Number is repeated. In a specific embodiment, different SC-MCCHs support different coverage enhancement levels (CEs), that is, different SC-MCCHs have different enhanced coverage levels CE level, such as SC-MCCH1 corresponding to CE level 0. SC-MCCH2 corresponds to CE level 1, SC-MCCH3 corresponds to CE level 3, and SC-MCCH4 corresponds to CE level 4. Correspondingly, different SC-MCCHs correspond to different repetition numbers, such as SC-MCCH1 corresponding to the number of repeated transmissions {1, 2, 4, 8} (that is, SC-MCCH1 can be selected in different application scenarios). /2/4/8 times for transmission), SC-MCCH2 corresponds to {16, 32, 64, 128} (that is, SC-MCCH2 can select 16/32/64/128 times for transmission in different application scenarios). It can be understood that in other specific embodiments, different SC-MCCHs may correspond to the same enhanced coverage level, for example, SC-MCCH3 and SC-MCCH4 correspond to CE level 4. It can be understood that the PDCCHs corresponding to different SC-MCCHs may also have different enhanced coverage levels CE level, such as PDCCH1 corresponding to CE level 0, PDCCH2 corresponding to CE level 1, PDCCH3 corresponding to CE level 3, etc., and specific mapping conditions may be referred to. SC-MCCH mapping with CE level.

In some possible embodiments, the service information is used to indicate an identifier of a service configured by the multicast control channel, where the service information is in one-to-one correspondence with the multicast control channel, and refers to a multicast. The multicast control information included in the control channel specifically configures which services, and the service information includes the label of the service. The knowledge can be a service ID or a session ID or a Temporary Mobile Group Identity (TMGI). The different services may be configured by different SC-MCCHs. In a specific embodiment, the services may be identified by a temporary mobile device group identifier (TMGI), such as SC-MCCH1 corresponding to TMGI1, TMGI2, and SC-MCCH2 corresponding to TMGI3. , TMGI4. In another specific embodiment, the service may be identified by a service identifier (service ID) or a session identifier (Session ID), such as SC-MCCH1 corresponding to service ID1, service ID2, SC-MCCH2 corresponding to service ID3, service ID4 or SC. - MCCH1 corresponds to Session ID1 and Session ID2, and SC-MCCH2 corresponds to Session ID3 and Session ID4. It can be understood that in other specific embodiments, different services may be configured by the same SC-MCCH, for example, SC-MCCH1 and SC-MCCH2 correspond to TMGI1 or service ID1.

In some possible embodiments, the radio network temporary identifier (RNTI) is used to scramble a physical downlink control channel of the multicast control channel, where the radio network temporary identifier is in one-to-one correspondence with the multicast control channel, It refers to which Radio Network Temporary Identity (RNTI) of a physical downlink control channel of a multicast control channel is used for scrambling. Specifically, the RNTI may be an SC-RNTI. If there are multiple SC-MCCHs, multiple SC-RNTIs, such as SC-RNTI1, SC-RNTI2, etc., can be configured. Alternatively, one SC-RNTI is configured for multiple SC-MCCHs, and PDCCHs of all SC-MCCHs are scrambled using the same SC-RNTI. The radio network temporary identifier may be a Single Cell Radio Network Temporary Identifier (SC-RNTI), and may be a Paging Radio Network Temporary Identifier (P-RNTI), or may be Other wireless network temporary identifiers are not specifically limited in the present invention.

It can be understood that, in a specific implementation, the number of radio network temporary identifiers can be set to one. For example, if multiple SC-MCCHs use the same SC-RNTI, only one corresponding SC-RNTI is needed. The plurality of multicast control channels when the number of the wireless network temporary identifiers is one The multiple PDCCHs are scrambled by using the radio network temporary identifier, so that the RNTI resource consumption can be reduced. The RNTI resource can be understood as the number of RNTIs, because the number of RNTIs is limited.

It can be understood that, in another specific implementation manner, the number of radio network temporary identifiers may be set to multiple. For example, if multiple SC-MCCHs use different SC-RNTIs, the corresponding SC-RNTIs also need to have multiple . When the number of the temporary identifiers of the wireless network is multiple, the multiple PDCCHs of the multiple multicast control channels are in one-to-one correspondence with the temporary identifiers of the wireless network, that is, multiple of the multiple multicast control channels. The PDCCH is scrambled using the plurality of radio network temporary identifiers respectively, so that different PDCCHs are scrambled using different radio network temporary identifiers.

As shown in the above description, the network device sends configuration information of one or more multicast control channels to the user equipment, where the eNB sends a system message to the UE, where the system message is used to configure one or more SC- The configuration information of the MCCH includes: a mapping relationship between the SC-MCCH and the Narrowband, a mapping relationship between the SC-MCCH and the transmission time, a mapping relationship between the SC-MCCH and the CE level, and a mapping relationship between the SC-MCCH and the service. Mapping relationship between SC-MCCH and SC-RNTI. It can be understood that, after receiving the configuration information, the user equipment can learn the foregoing mapping relationship of the SC-MCCH. It can also be understood that the multicast control information is used to configure or control the transmission or reception of the SC-MTCH or the MTCH, the multicast communication service data is carried on the SC-MTCH or MTCH channel, and the multicast control information is carried in the SC-MCCH, so The configuration information also includes the configuration of the multicast control information.

S102: The network device sends the indication information to the user equipment. Correspondingly, the user equipment receives the indication information sent by the network device.

See Figures 5A through 5E for comprehensiveness. In an embodiment of the invention, the indication information is used to indicate a change of one or more multicast control information. The multicast control information may be used to configure or control transmission or reception of a multicast traffic channel, and the multicast traffic channel may be an SC-MTCH or an MTCH. Specifically, since the multicast control channel can configure or control the transmission or reception of the multicast traffic channel, the multicast control information carried on the multicast control channel can be used to configure or control the transmission of the SC-MTCH or MTCH or Receiving, for example, the SC-MCCH's multicast control information can be used to configure or control the transmission or reception of the SC-MTCH, and the MCCH's multicast control information can be used to configure or control the transmission or reception of the MTCH.

In a specific embodiment, the indication information may be a change notification or a change notification. If the user equipment does not receive the change notification, the user equipment does not change the multicast control information, and will not receive the multicast control information. If the user equipment receives the change notification, the user equipment considers that the multicast control information has changed. The user equipment will regain the multicast control information. For example, the network device sends the indication information to the user equipment through the PDCCH. When the SC-MCCH is not changed, the SC-MCCH does not carry the indication information on the PDCCH, and the network device scrambles the PDCCH by using the SC-RNTI. When the MCCH is changed, the PDCCH carries the indication information, and the network device scrambles the PDCCH by using the SC-N-RNTI, where the SC-N-RNTI is the RNTI carrying the SC-MCCH change notification. Therefore, when the user equipment detects the PDCCH of the SC-NCH that is scrambled by the SC-N-RNTI, it can be considered that the indication information is received, and the user equipment needs to reacquire the multicast control information.

In the present invention, the PDCCH involved may also be an MTC PDCCH for the MTC technology, that is, an MPDCCH.

For the sake of understanding, a network device that sends the indication information to the user equipment is provided, as shown in FIG. 5A, where the sending, by the network device, the indication information to the user equipment may include: sending, by the eNB, the PDCCH or the paging message to the user equipment. The indication information is used to indicate the change of the multicast control information to the user equipment, and the paging message may be Paging. Specifically, the direct indication information (Direct Indication Information) in the paging message may be used to indicate one or more Changes to multicast control information. The PDCCH may be a PDCCH of an SC-MCCH or a PDCCH of an SC-MTCH.

That is, the network device sends the indication information to the user equipment in order to indicate to the user equipment that one or more multicast control information changes.

That is, in the embodiment of the present invention, the network device may send the indication information to the user equipment by using the PDCCH of the SC-MCCH, or the PDCCH of the SC-MTCH, or the paging message (Paging), as shown in FIG. 5B, as follows: :

The network device (eNB) may send the indication information to the user equipment through a Physical Downlink Control Channel (PDCCH) of one or more Multicast Control Channels (SC-MCCH), as shown in FIG. 5C. The Physical Downlink Control Channel (PDCCH) of one or more Multicast Control Channels (SC-MCCH) referred to herein refers to one or more PDCCHs. Specifically, the eNB may send indication information on the PDCCH of all SC-MCCHs, and the UE may receive indication information that is sent by using the PDCCH. When the network device sends the indication information through the PDCCH of the SC-MCCH, the PDCCH may be located in different narrowbands, or may be located in some/some narrowband. For example, the PDCCH may be located in Narrow Band1, Narrow Band2, and Narrow Band3, respectively. Scheduling different SC-MCCHs.

The network device may send the indication information to the user equipment through a Physical Downlink Control Channel (PDCCH) of one or more multicast traffic channels SC-MTCH, as shown in FIG. 5D, one or more of the ones described herein The Physical Downlink Control Channel (PDCCH) of the Multicast Traffic Channel SC-MTCH refers to one or more PDCCHs. When the network device sends the indication information through the PDCCH of the SC-MTCH, the PDCCH may be located in different narrowbands, or may be located in some/some narrowband, for example, the PDCCH may be located in the Narrow Band2.

The network device may send the indication information to the user equipment by using a paging message, as shown in FIG. 5E. Generally, the user equipment always receives the paging message, and the paging is sent on a fixed narrowband. For example, the paging can be fixed on the Narrow band 2 to send indication information, and the PDCCH schedules the corresponding SC-MCCH based on the indication information.

Moreover, in a specific embodiment, the indication information further includes bitmap information. The bitmap is used to specifically indicate which SC-MCCH sends a change, the bitmap information may be a bitmap, the bitmap includes n bits, and the n bits are used to indicate Corresponding n multicast control information or Whether n SC-MCCHs have changed, and n is a positive integer greater than 1. For example, if there are a total of eight SC-MCCHs, the eight bits can be used to indicate whether the SC-MCCH is changed. Specifically, for a specific SC-MCCH, if the SC-MCCH is changed, it is represented by "1". If the SC-MCCH is unchanged, it is represented by "0". For example, the bitmap is 10010000, indicating that among the eight SC-MCCHs, the first and fourth SC-MCCHs are changed, and the other SC-MCCHs are unchanged.

In the embodiment of the present invention, the multicast control information is carried in the multicast control channel, and the multicast control information usually includes an identifier of the SC-PTM service, and is used to receive a single cell multicast traffic channel (Single Cell Multi-cast Traffic Channel, The identifier of SC-MTCH) and the time information (sc-mtch-schedulingInfo) for receiving SC-MTCH, and the like.

In some possible implementations, the identifier of the SC-PTM service may be a Temporary Mobile Group Identity (TMGI), or may be a Session ID, or other identifiers used to identify the service, which is not specifically limited by the present invention.

S103: The network device sends the changed multicast control information to the user equipment based on the indication information. Correspondingly, the user equipment receives the changed multicast control information that is sent by the network device based on the indication information.

Generally, the user equipment may receive the multicast control information carried in the SC-MCCH based on the scheduling of the PDCCH. Further, after the user equipment receives the indication information, the user equipment may also receive the bearer in the SC-MCCH based on the scheduling of the PDCCH. The changed multicast control information in the middle.

The user equipment receives the changed multicast control information that is sent by the network device based on the indication information, and includes at least one of the following:

After the user equipment determines the coverage level of the user equipment, the user equipment receives the changed multicast control information carried in the multicast control channel corresponding to the coverage level of the user equipment. The corresponding relationship mentioned here means that the user equipment is in a certain coverage level. For example, when the user equipment 1 receives downlink data, it needs to repeatedly receive 128 times to successfully receive data, and the user equipment 2 needs to receive data. Repeated reception 64 times to successfully receive data, different multicast control information is transmitted using different coverage levels, for example, multicast control information 1 is repeatedly transmitted 128 times, and multicast control information 2 is repeatedly transmitted 64 times. Thus, the correspondence relationship means that the user equipment 1 can only receive the multicast control information 1 and cannot receive the multicast control information 2, and the user equipment 2 can receive the two multicast control information. The coverage level of the user equipment is an enhanced coverage level CE level. That is, for the user equipment, the user equipment can determine the CE level required by the user equipment according to its own situation. For example, the user equipment passes the measurement network equipment. The quality of the signal sent to determine its own CE level.

After the user equipment determines the identifier of the multicast service of interest, the user equipment receives the service information including the identifier of the multicast service of interest, and the service information may include a TMGI, a session ID, a service ID, and the like. The service information is included in the multicast control information, that is, the changed multicast control information carried in the multicast control channel received by the user equipment includes the service information. It is to be understood that the user equipment sets the identifier of the multicast service in the user equipment based on the user's needs, and the identifier corresponding to the multicast service is a multicast service that is interested in the user equipment, where the multicast service may be directed by the network device. User equipment sends.

Determining, by the user equipment, the narrowband information or the time information of the multicast control channel according to the configuration information, where the user equipment receives the narrowband or time indicated by the narrowband information or the time information The changed multicast control information carried in the control channel is broadcasted. That is, the user equipment determines, according to the narrowband information in the configuration information, on which narrowband a certain multicast control channel is sent, and then the user equipment can receive correspondingly on the narrowband corresponding to the multicast control channel. Broadcasting the control information, or the user equipment determines, according to the time information in the configuration information, at which time a certain multicast control channel is sent, and then the user equipment can receive the corresponding time at the time corresponding to the multicast control channel. Multicast control information.

Determining, by the user equipment, the radio network temporary identifier (RNTI) of the multicast control channel according to the configuration information, where the user equipment receives the multicast control by using the radio network temporary identifier The multicast control information carried in the channel. The radio network temporary identifier (such as the SC-RNTI) may be used to scramble the PDCCH corresponding to the multicast control channel. For example, when there is no bearer indication information on the PDCCH, the network device scrambles the PDCCH by using the SC-RNTI. When the indication information is carried on the PDCCH, the network device scrambles the PDCCH by using the SC-N-RNTI. When the user equipment detects the SC-N-RNTI scrambled PDCCH, the user equipment learns the change of the SC-MCCH, and then the user equipment receives the changed multicast control information carried in the multicast control channel. The user equipment receives the multicast control information carried in the multicast control channel by using the wireless network temporary identifier, where the user equipment receives the multicast control by using the wireless network temporary identifier. The PDCCH of the channel is then received according to the scheduling information of the PDCCH.

The user equipment determines the changed multicast control information according to the bitmap information, and the user equipment receives the changed multicast control information based on the bitmap information. For example, the bitmap information received by the user equipment is 10010000, indicating that in the eight SC-MCCHs, the first and fourth SC-MCCHs are changed, then the user equipment can only receive the first SC- Multicast control information carried by the MCCH and multicast control information carried by the fourth SC-MCCH.

S104: The network device sends multicast communication service data to the user equipment based on the multicast control information. Correspondingly, the user equipment receives multicast communication service data based on the multicast control information.

First, for ease of understanding, the user equipment receives the multicast control information in step S103 and the user equipment receives the multicast communication service data in this step:

In the embodiment of step S103, the multicast control information is carried in the SC-MCCH. In a specific embodiment, the SC-MCCH is mapped to the PDSCH, and the SC-MTCH is also mapped to the PDSCH. The PDSCH mapped to the MCCH is denoted as MCCH-PDSCH, and correspondingly, the PDCCH scheduling MCCH-PDSCH is denoted as MCCH-PDCCH. Network devices can use configuration letters The wireless network temporary identity in the message scrambles the MCCH-PDCCH. The user equipment descrambles the MCCH-PDCCH according to the radio network temporary identifier obtained from the configuration message, to obtain the scheduling information of the MCCH-PDSCH from the MCCH-PDCCH, and then, according to the scheduling information of the MCCH-PDSCH, from the SC-MCCH Get multicast control information.

In the embodiment of the step S104, the multicast communication service data is carried in the SC-MTCH, and the SC-MTCH is mapped to the PDSCH. Correspondingly, the PDSCH mapped by the SC-MTCH can be recorded as the MTCH-PDSCH, and the MTCH- The PDCCH of the PDSCH is denoted as MTCH-PDCCH. The network device may scramble the MTCH-PDCCH using an identifier for receiving the SC-MTCH in the multicast control information. The user equipment descrambles the MTCH-PDCCH according to the identifier for receiving the SC-MTCH obtained from the multicast control information, to obtain the scheduling information of the MTCH-PDSCH from the MTCH-PDCCH, and then, according to the MTCH-PDSCH The scheduling information acquires the multicast communication service data from the SC-MTCH. It can be understood that the process of the SC-MTCH transmitting the service data is controlled by the SC-MCCH.

The multicast communication service data is data corresponding to a multicast service (for example, software upgrade data), and the multicast service is a service in SC-PTM multicast communication. After receiving the changed multicast control information sent by the network device, the user equipment receives corresponding multicast communication service data according to the changed multicast control information, where the multicast communication service data is carried in the SC-MTCH. .

The process of receiving the multicast communication service data by the user equipment based on the multicast control information may be understood as follows: For the user equipment, first, the user equipment receives the system message sent by the network device, so as to learn multiple The configuration information of the SC-MCCH is as follows. Secondly, if the SC-MCCH changes, the user equipment receives the indication information sent by the network device, so as to learn the change of the multicast control information of the multiple SC-MCCHs; again, the user equipment receives the information sent by the network device. The changed multicast control information; finally, the user equipment selects an appropriate SC-MCCH based on the configuration information of the plurality of SC-MCCHs, and then receives the SC-MTCH based on the suitable SC-MCCH.

The configuration information includes: (For details of the configuration information, refer to the description of the S101 embodiment):

(1) SC-MCCH has a mapping relationship with Narrowband.

(2) The SC-MCCH has a mapping relationship with the transmission time.

(3) The SC-MCCH has a mapping relationship with the CE level.

(4) The SC-MCCH has a mapping relationship with the service.

(5) The SC-MCCH has a mapping relationship with the SC-RNTI.

The following describes several cases in which the user equipment selects the appropriate SC-MCCH received multicast communication service data based on the configuration information:

Case 1: When the configuration information includes (1) and/or (2), if one or more SC-MCCHs are changed, the eNB sends indication information on all PDCCHs of the SC-MCCH, when the UE is interested in When the PDCCH corresponding to the SC-MCCH detects the indication information, the UE re-receives all SC-MCCHs.

Case 2: When the above configuration information includes (1) and/or (2), and (3), that is, after the mapping relationship between the SC-MCCH and the CE level is introduced on the basis of the case 1, the UE determines its own location. CE level, and re-receive SC-MCCH not lower than its CE level. That is, if the CE level of UE1 is 2, UE1 can receive the SC-MCCH at CE level 2 or CE level 3.

Case 3: When the above configuration information includes (1) and/or (2), and (4), that is, after the mapping relationship between the SC-MCCH and the service is introduced on the basis of the case 1, the UE determines that it is interested in the Service and re-receive the SC-MCCH it is interested in. That is, the UE obtains the SC-MCCHs of which services are configured by the SC-MCCH by receiving the system message, so that after the UE receives the SC-MCCH change indication information, the UE only receives the SC-MCCH configured with the service of interest.

Case 4: When the above configuration information includes (1) and/or (2), and (3) and (4), that is, the first case, the second case and the third case are integrated at the same time, it can be understood that the UE re-receives and satisfies SC-MCCH with the following conditions:

1> Configure the SC-MCCH of the service that the UE is interested in,

2> The CE level of the SC-MCCH is not lower than the SC-MCCH of the CE level where the UE is located.

In order to facilitate the process of selecting a plurality of user equipments to select the respective SC-MCCHs to receive the multicast communication service data based on the configuration information, reference is made to FIG. 7. FIG. 7 is a schematic diagram of multiple UEs selecting based on configuration information according to an embodiment of the present invention. A schematic diagram of receiving appropriate multicast communication service data. As shown in Figure 7:

On the eNB side, the SC-MTCH is grouped, and the SC-MTCHs of the same enhanced coverage level can be grouped together and configured using one SC-MCCH. For example, for SC-MCCH1, SC-MTCH1, SC-MTCH2 can be included. A plurality of different SC-MTCHs, each having the same enhanced coverage level (e.g., CE level 1), one SC-MTCH corresponding to one communication service data, such as SC-MTCH1 corresponding to communication service data 1, and so on. SC-MTCHs with different enhanced coverage levels are configured using different SC-MCCHs, and SC-MCCHs also use corresponding enhanced coverage levels, such as SC-MCCH1 corresponding to CE level 1, SC-MCCH2 corresponding to CE level 2. analogy.

On the UE side, after receiving the system message sent by the eNB, the UE learns the configuration information of the eNB. For different UEs, such as UE1, UE2, and UE3, they are in different environments, and the requirements for multicast services are different. However, they can all select the SC-MCCH that meets their needs based on the CE level at which they are located and/or the services they are interested in, and then receive the multicast communication service data they require.

Based on the same inventive concept, the embodiment of the present invention further provides a network device 80, which is used to implement the method described in the foregoing embodiment of FIG. As shown in FIG. 8, the network device 80 includes a transmitter 803, a memory 802, and a processor 801 coupled to the memory 802. (The number of processors 801 may be one or more, and one processor in FIG. 8 is taken as an example. ). The transmitter 803, the memory 802, and the processor 801 may be connected by a bus or other means (in FIG. example). Among them, the transmitter 803 is used to send data to the outside, the memory 802 is used to store program code, and the processor 801 is used to call and run the program code stored in the memory 802. The program code stored in the memory 802 is specifically used to implement the functions of the base station in the embodiment of FIG. Specifically, the processor 801 is configured to call the program code stored in the memory 802, and perform the following steps:

Using the transmitter 803 to send indication information to the user equipment, where the indication information is used to indicate a change of one or more multicast control information, where the multicast control information is carried on a multicast control channel;

Transmitting, by the transmitter 803, the changed multicast control information to the user equipment based on the indication information;

The transmitter 803 is used to transmit multicast communication service data to the user equipment based on the multicast control information.

In the specific implementation of the embodiment of the present invention, the indication information sent by the processor 801 to the user equipment by using the transmitter 803 is specifically at least one of the following:

Transmitting, by the transmitter 803, the indication information to the user equipment by using a paging message;

Transmitting, by the transmitter 803, the indication information to the user equipment by using a physical downlink control channel of one or more multicast control channels;

The indication information is transmitted to the user equipment by the transmitter 803 over a physical downlink control channel of one or more multicast traffic channels.

Optionally, the indication information further includes bitmap information, where the bitmap information includes n bits, where the n bits are used to indicate whether the corresponding n multicast control information changes, and n is greater than 1. A positive integer.

In the embodiment of the present invention, the processor 801 is further configured to: use the transmitter 803 to send configuration information of the multicast control channel to the user equipment, where the configuration information is carried in a system message.

Optionally, the configuration information includes at least one of the following:

Among them, for wireless network temporary identification:

Optionally, the number of the temporary identifiers of the wireless network may be multiple, and when the number of the temporary identifiers of the wireless network is multiple, multiple physical downlink control channels of the multiple multicast control channels and the wireless The network temporary identifiers correspond one-to-one.

Optionally, the number of the temporary identifiers of the wireless network may be one. When the number of temporary identifiers of the wireless network is one, multiple physical downlink control channels of the multiple multicast control channels are temporarily used by using the wireless network. The logo is scrambled.

It should be noted that the execution steps of the processor 801 and other technical features involved in the processor 801 may also refer to related content of the network device in the method embodiment of FIG. 3, and details are not described herein again.

Based on the same inventive concept, the embodiment of the present invention further provides a user equipment 90, which is used to implement the method described in the foregoing embodiment of FIG. As shown in FIG. 9, the user equipment 90 includes: a receiver 903, a memory 902, and a processor 901 coupled to the memory 902 (the number of processors 901 may be one or more, and one processor in FIG. 9) For example). The receiver 903, the memory 902, and the processor 901 can be connected by a bus or other means (in FIG. 9 to take a bus connection as an example). The receiver 903 is configured to receive externally transmitted information, and the memory 902 is configured to store The program code is used by the processor 901 to call and run the program code stored in the memory 902. The program code stored in the memory 902 is specifically used to implement the functions of the user equipment in the embodiment of FIG. Specifically, the processor 901 is configured to call the program code stored in the memory 902, and perform the following steps:

Receiving, by the receiver 903, indication information sent by the network device, where the indication information is used to indicate a change of one or more multicast control information, where the multicast control information is carried on a multicast control channel;

Receiving, by the receiver 903, the changed multicast control information that is sent by the network device based on the indication information;

The multicast communication service data is received by the receiver 903 based on the changed multicast control information.

In a specific implementation of the embodiment of the present invention, the processor 901 receives, by using the receiver 903, the indication information that is sent by the network device, and is at least one of the following:

Receiving, by the receiver 903, the indication information that is sent by the network device by using a paging message;

Receiving, by the receiver 903, the indication information that is sent by the network device by using a physical downlink control channel of one or more multicast control channels;

The indication information transmitted by the network device through a physical downlink control channel of one or more multicast traffic channels is received by the receiver 903.

In the embodiment of the present invention, the processor 901 is further configured to: receive, by using the receiver 903, configuration information of the multicast control channel that is sent by the network device, where the configuration information is carried in a system message.

Among them, for wireless network temporary identification:

In a specific implementation, the processor receives, by using the receiver, the changed multicast control information that is sent by the network device according to the indication information, and includes at least one of the following:

The processor 901 determines an coverage level of the user equipment, and uses the receiver 903 to receive the multicast control channel corresponding to a coverage level of the user equipment, where the multicast control channel carries the multicast control information;

The processor 901 determines an identifier of a multicast service of interest, and uses the receiver 903 to receive service information including an identifier of the multicast service of interest, and receives and coordinates with the receiver 903. The multicast control channel corresponding to the service information, where the multicast control channel carries the multicast control information;

The processor 901 determines the narrowband information or the time information of the multicast control channel according to the configuration information, and uses the receiver 903 to receive the narrowband or time indicated by the narrowband information or the time information. The multicast control channel, where the multicast control channel carries the multicast control information;

The processor 901 determines the wireless network temporary identifier of the multicast control channel according to the configuration information, and the processor uses the wireless network temporary identifier to receive the multicast control channel by using the receiver 903, The multicast control channel carries the multicast control information;

The processor 901 determines the changed multicast control information according to the bitmap information, and receives the changed multicast control information by using the receiver 903.

It should be noted that the execution steps of the processor 901 and other technical features involved in the processor 901 may also refer to related content of the user equipment in the method embodiment of FIG. 3, and details are not described herein again.

Based on the same inventive concept, an embodiment of the present invention further provides a network device 100 (shown in FIG. 10) and a user equipment 110 (shown in FIG. 11) for performing a multicast communication described in the foregoing FIG. 3 embodiment. method.

As shown in FIG. 10, the network device 100 can include:

The first sending unit 1001 is configured to send, to the user equipment, indication information, where the indication information is used to indicate a change of one or more multicast control information, where the multicast control information is carried on a multicast control channel;

The second sending unit 1002 is configured to send the changed multicast control information to the user equipment based on the indication information;

The third sending unit 1003 is configured to send multicast communication service data to the user equipment based on the multicast control information.

It should be noted that, through the foregoing detailed description of the embodiment of FIG. 3, the implementation methods of the various functional modules included in the network device 100 can be clearly understood by those skilled in the art, and therefore, for the sake of brevity of the description, details are not described herein.

As shown in FIG. 11, the user equipment 110 may include:

The first receiving unit 1101 is configured to receive indication information that is sent by the network device, where the indication information is used to indicate a change of one or more multicast control information, where the multicast control information is carried on a multicast control channel;

The second receiving unit 1102 is configured to receive the changed multicast control information that is sent by the network device based on the indication information;

The third receiving unit 1103 is configured to receive multicast communication service data based on the changed multicast control information.

It should be noted that, through the foregoing detailed description of the embodiment of FIG. 3, the implementation methods of the various functional modules included in the user equipment 110 can be clearly understood by those skilled in the art, and therefore, for the sake of brevity of the description, details are not described herein.

In addition, an embodiment of the present invention further provides a communication system, where the communication system includes: a network device and a user equipment. The network device and the user equipment respectively correspond to the network device and the terminal device in the method embodiment of FIG.

In a specific implementation, the network device may be the network device 80 represented by FIG. 8, and the user device may be the network device 90 represented by FIG. Alternatively, the network device may be the network device 100 represented by FIG. 10, which may be the user device 110 represented by FIG.

When the user equipment needs to receive service data (such as software upgrade data), the network device (such as a base station) sends indication information to the user equipment for indicating one or more multicast control information to the user equipment. Change, the multicast control information is carried on the multicast control channel, that is, Corresponding to the multicast control information, the number of the multicast control channels is one or more, after which the network device sends the changed multicast control information to the user equipment, and the user equipment is based on the multicast control. The information receives multicast communication service data. That is, by implementing the embodiments of the present invention, multiple multicast control channels (such as multiple SC-MCCHs) can be configured to schedule one or more multicast communication service data (such as software upgrade data), and the user equipment is configured according to relevant The scheduling may be based on the requirements of the user equipment to receive corresponding communication service data, thereby reducing power consumption of the user equipment and reducing wireless resource consumption of the network device.

A semi-persistent scheduling communication method provided by another embodiment of the present invention includes:

S1201: The network device sends configuration information of the SPS information to the UE.

The configuration information includes a modification period of the SPS information.

In this embodiment, the network device may send the configuration information of the SPS information to the user equipment UE under the coverage by using a broadcast signaling or a dedicated signaling (Dedicated Signaling). The SPS information may be carried on the PDCCH channel for the UE to perform uplink data transmission or downlink data reception. The configuration information includes a modification period of the SPS information. During the modification period, the SPS information remains unchanged, and the network device can repeatedly send the SPS information within the modification period. The network device can send the updated SPS information at the beginning of the next modification period. Specifically, the network device may be an evolved base station (English: evolved Node B, eNB for short), or a centralized unit (English: Central Unit, CU for short) or a distributed unit (English: Distributed Unit, for short: DU) ). The modification period may be represented by a system frame number (SFN) or by a subframe number (Subframe). The system frame number of the first PDCCH that the network device sends is SFN mod modification period=0, and the subframe that sends the first PDCCH may be the subframe number 0, or the network device sends the configuration information to the UE. Alternatively, the subframe number of the first PDCCH sent by the network device satisfies [10×SFN+subframe]mod modification period=0. Mod represents the modulo operation.

S1202: The network device sends a first physical downlink control channel (first PDCCH) to the user equipment according to the modification period.

In this embodiment, the SPS information may be carried on the first PDCCH channel, and the network device sends the SPS information to the UE by using the first PDCCH, and is used by the UE to receive downlink data or send uplink data. The network device sends the first PDCCH to the UE at least at the beginning of each modification period. Optionally, the network device may also repeatedly send the first PDCCH in a modification period. Optionally, the network device may further send the foregoing SPS information in a modification period, where the PDCCH carrying the SPS information may be different from the first PDCCH.

In the present invention, the PDCCH may also be other control channels, such as an EPDCCH, which is not limited herein.

Optionally, the configuration information further includes a first offset, where the first offset is used to determine a time when the first PDCCH is sent;

Specifically, the system frame number of the first PDCCH sent by the network device satisfies the SFN mod modification period=first offset. Mod represents the modulo operation.

Alternatively, the subframe number of the first PDCCH sent by the network device satisfies [10×SFN+subframe] mod modification period=first offset. Mod represents the modulo operation.

Optionally, the first PDCCH may also be used to activate an SPS configuration. The network device may send the first PDCCH by using the time when the first PDCCH is sent for the first time, and the first PDCCH is included in the period of the modification period, where the first PDCCH includes the first SPS information, and the first PDCCH that is periodically sent may include the first SPS information. Same or different.

Optionally, when the first PDCCH is periodically sent, the first PDCCH is sent for the first time. When the time is the starting point, the network device sends a second PDCCH to the user equipment, where the second PDCCH includes the first SPS information and first indication information, where the first indication information is used to indicate that the first PDCCH is sent The time difference between the second PDCCH and the first PDCCH. The first SPS information is the same as the first SPS information included in the first PDCCH sent in the same period.

Specifically, the network device may repeatedly send the first SPS information in the modification period, where the first SPS information is carried in the second PDCCH.

Optionally, the second PDCCH may further include SPS configuration activation indication information, where the SPS activation indication information is used to indicate SPS configuration activation.

S1203. The network device communicates with the user equipment according to the SPS information.

In this embodiment, the network device communicates with the user equipment according to the SPS information, and may include the network device configuring the uplink SPS information, and the network device receives the uplink data sent by the UE according to the uplink SPS information. The network device may also configure the downlink SPS information, and the network device sends the downlink data to the UE according to the downlink SPS information.

In the prior art, SPS information can be used periodically, and SPS information can be updated at any time. Therefore, the UE needs to monitor the PDCCH all the time to monitor whether there is updated SPS information or dynamic scheduling information. In some scenarios, the network device may configure a modification period for the UE, during which the SPS information is unchanged, and the SPS information may be used periodically. The UE that has received the SPS information can reuse the SPS information in the current modification period, and does not need to monitor other scheduling information, so that the power consumption of the UE can be reduced. The UE that has not received the SPS information at the current moment needs to continue to monitor the PDCCH to acquire the SPS information. To further reduce the power consumption of these UEs, the network device may repeatedly send the SPS information in the modification period, and the period of repeatedly transmitting the SPS information is less than the modification period, and may be greater than or equal to the reuse period of the SPS information. Once these UEs receive the SPS information, the information can be monitored for the PDCCH during the current modification period. The network device can send updated SPS information at the beginning of each modification period, so that the UE configuring and activating the SPS needs to be opened in each modification period. The PDCCH is monitored at the beginning to obtain updated SPS information.

The semi-persistent scheduling communication method provided by the embodiment sends the configuration information of the SPS information to the UE by using the network device, where the configuration information includes a modification period of the SPS information, and then the network device sends the SPS information to the UE according to the modification period. The first PDCCH, and finally the network device communicates with the UE according to the SPS information, so that the UE monitors the PDCCH once in each modification period, which reduces the power consumption of the user equipment.

A semi-persistent scheduling communication method provided by another embodiment of the present invention may include:

S1401: The UE receives configuration information of SPS information sent by the network device.

In this embodiment, the UE may receive configuration information of the SPS information sent by the network device by using a broadcast signaling or a dedicated signaling (Dedicated Signaling). The SPS information may be carried on the PDCCH channel for the UE to perform uplink data transmission or downlink data reception. The configuration information includes a modification period of the SPS information. During the modification period, the SPS information remains unchanged, and the UE may repeatedly receive the SPS information within the modification period. In order to reduce UE power consumption, the UE may receive SPS information once at the beginning of each modification period. The UE may receive the updated SPS information at the beginning of the next modification period. Specifically, the network device may be an evolved base station (English: evolved Node B, eNB for short), or a centralized unit (English: Central Unit, CU for short) or a distributed unit (English: Distributed Unit, for short: DU) ). The modification period may be represented by a system frame number (SFN) or by a subframe number (Subframe). The UE receives the system frame number of the first PDCCH and satisfies the SFN mod modification period=0. The subframe that receives the first PDCCH may be the subframe No. 0, or the UE obtains the subframe position of the first PDCCH by using the configuration information of the network device. Alternatively, the UE receives the subframe number of the first PDCCH that satisfies [10×SFN+subframe]mod modification period=0. Mod represents the modulo operation.

S1402: The UE receives the first physical transmission sent by the network device according to the modification period. Row control channel (first PDCCH).

In this embodiment, the SPS information may be carried on the first PDCCH channel, and the UE receives the SPS information sent by the network device by using the first PDCCH, and is used by the UE to receive downlink data or send uplink data. The UE receives the first PDCCH sent by the network device at least at the beginning of each modification period. Optionally, the UE may further receive the first PDCCH in a modification period.

Optionally, the configuration information further includes a first offset, where the first offset is used to determine a time when the first PDCCH is received;

And the receiving, by the UE, the first PDCCH by the network device according to the modification period, further includes:

The UE receives the network device to send the first PDCCH according to the modification period and the first offset.

Specifically, the system frame number of the UE receiving the first PDCCH satisfies the SFN mod modification period=first offset. Mod represents the modulo operation.

Alternatively, the UE receives the subframe number of the first PDCCH that satisfies [10×SFN+subframe]mod modification period=first offset. Mod represents the modulo operation.

Optionally, the first PDCCH may also be used to activate an SPS configuration. When the PDCCH received by the UE includes the first SPS information and the first indication information, the first first indication information is used to indicate a time difference between sending the second PDCCH and sending the first PDCCH. When the PDCCH received by the UE does not include the first indication information or the time difference is 0, it indicates that the PDCCH is the first PDCCH that is sent in the modification period, otherwise, the PDCCH is the second PDCCH.

When the UE receives the first PDCCH, the UE receives the first PDCCH in a period of a modification period.

When the UE receives the second PDCCH, the UE receives the first PDCCH according to the time difference, and then receives the first PDCCH according to the modification period.

S1403. The UE communicates with the network device according to the SPS information.

In this embodiment, the UE communicates with the network device according to the SPS information, and may include the UE receiving the uplink SPS information configured by the network device, and the UE sending the uplink data to the network device according to the uplink SPS information. The UE may also receive the downlink SPS information configured by the network device, and the UE receives the downlink data sent by the network device according to the downlink SPS information.

In the prior art, SPS information can be used periodically, and SPS information can be updated at any time. Therefore, the UE needs to monitor the PDCCH all the time to monitor whether there is updated SPS information or dynamic scheduling information. In some scenarios, the network device may configure a modification period for the UE, during which the SPS information is unchanged, and the SPS information may be used periodically. The UE that has received the SPS information can reuse the SPS information in the current modification period, and does not need to monitor other scheduling information, so that the power consumption of the UE can be reduced. The UE that has not received the SPS information at the current moment needs to continue to monitor the PDCCH to acquire the SPS information. To further reduce the power consumption of these UEs, the network device may repeatedly send the SPS information in the modification period, and the period of repeatedly transmitting the SPS information is less than the modification period, and may be greater than or equal to the reuse period of the SPS information. Once these UEs receive the SPS information, the information can be monitored for the PDCCH during the current modification period. The network device may send the updated SPS information at the beginning of each modification period, such that the UE configuring and activating the SPS needs to monitor the PDCCH at the beginning of each modification period to obtain updated SPS information.

The embodiment of the invention further provides a network device, which comprises:

a sending unit, configured to send configuration information of semi-persistent scheduling (SPS) information to the user equipment UE, where the configuration information includes a modification period of the SPS information, and the sending unit is further configured to send the user equipment according to the modification period Transmitting a first physical downlink control channel (first PDCCH), where the first PDCCH includes the SPS information;

And a processing unit, configured to communicate with the user equipment according to the SPS information.

Optionally, the sending unit is further configured to send, by the user equipment, a second PDCCH, where the second PDCCH includes the first SPS information and first indication information, where the first indication information is used to indicate a sending station. Describe a time difference between the second PDCCH and the first PDCCH.

Optionally, the sending unit is further configured to send the first PDCCH to the UE according to the modification period, including:

or,

Optionally, the sending unit is configured to send the first PDCCH to the user equipment according to the modification period and the first offset, including:

or,

The embodiment of the invention further provides a user equipment UE, which is characterized in that it comprises:

Optionally, the receiving unit is further configured to receive a second PDCCH that is sent by the network device, where the second PDCCH includes the first SPS information and first indication information, where the first indication information is used. And indicating a time difference between sending the second PDCCH and sending the first PDCCH, where the time difference indicates a time when the first PDCCH is sent before or after the second PDCCH.

Optionally, the receiving unit is further configured to receive the first PDCCH sent by the network device according to the modification period, including:

or,

Optionally, the receiving unit, configured to receive the first PDCCH sent by the network device according to the modification period and the first offset, includes:

or,

Optionally, the receiving unit is further configured to: when the receiving unit receives the second PDCCH, receive the first PDCCH according to the time difference, including:

or,

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or meter. Computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the invention

Claims

A multicast communication method, comprising:

The network device sends multiple multicast control information to the user equipment;

The network device sends the indication information to the user equipment, where the indication information is used to indicate that at least one of the multiple multicast control information is changed, and the multicast control information is carried on the multicast control channel;

Transmitting, by the network device, the changed at least one multicast control information to the user equipment;

The network device sends at least one multicast communication service data corresponding to the at least one multicast control information to the user equipment.
The method according to claim 1, wherein the indication information sent by the network device to the user equipment is specifically at least one of the following:

Sending, by the network device, the indication information to the user equipment by using a paging message;

Transmitting, by the network device, the indication information to the user equipment by using a physical downlink control channel of one or more multicast control channels;

The network device sends the indication information to the user equipment over a physical downlink control channel of one or more multicast traffic channels.
The method according to claim 1 or 2, wherein the method further comprises:

The network device sends the configuration information of the multicast control channel to the user equipment, where the configuration information is carried in a system message, where the configuration information includes at least one of the following:

Narrowband information, the narrowband information is used to indicate sending a narrowband of the multicast control channel, and the narrowband is in one-to-one correspondence with the multicast control channel;

Time information, the time information is used to indicate a time when the multicast control channel is sent, and the time is in one-to-one correspondence with the multicast control channel.
The method according to any one of claims 1 to 3, wherein the network device sends configuration information of the multicast control channel to the user equipment, where the configuration information includes at least one of the following:

Covering level information, the coverage level information is used to indicate a number of times of repeatedly transmitting the multicast control channel or the physical downlink control channel of the multicast control channel, the coverage level information and the multicast control channel or the One-to-one correspondence of physical downlink control channels of the multicast control channel;

Service information, where the service information is used to indicate an identifier of a service configured by the multicast control channel, where the service information is in one-to-one correspondence with the multicast control channel;

a wireless network temporary identifier, the wireless network temporary identifier is used to scramble a physical downlink control channel of the multicast control channel, and the wireless network temporary identifier is in one-to-one correspondence with the multicast control channel.
The method according to claim 4, wherein the number of the wireless network temporary identifiers may be multiple;

When the number of the temporary identifiers of the wireless network is multiple, the multiple physical downlink control channels of the multiple multicast control channels are in one-to-one correspondence with the temporary identifiers of the wireless network.
The method according to claim 4, wherein the number of the temporary identifiers of the wireless network may be one, and when the number of temporary identifiers of the wireless network is one, multiple physicals of the plurality of multicast control channels The downlink control channel is scrambled using the wireless network temporary identity.
The method according to any one of claims 1 to 6, wherein the indication information further comprises bitmap information, the bitmap information includes n bits, and the n bits are used to indicate corresponding n Whether the multicast control information has changed, and n is a positive integer greater than one.
A multicast communication method, comprising:

The user equipment receives multiple multicast control information sent by the network device;

The user equipment receives the indication information sent by the network device, where the indication information is used to indicate that at least one of the multiple multicast control information is changed, and the multicast control information is carried on the multicast control channel;

Receiving, by the user equipment, the changed at least one multicast control information sent by the network device;

The user equipment receives at least one multicast communication service data corresponding to the at least one multicast control information.
The method according to claim 8, wherein the indication information that is sent by the user equipment and received by the network device is specifically at least one of the following:

Receiving, by the user equipment, the indication information that is sent by the network device by using a paging message;

Receiving, by the user equipment, the indication information that is sent by the network device by using a physical downlink control channel of one or more multicast control channels;

The user equipment receives the indication information that is sent by the network device through a physical downlink control channel of one or more multicast traffic channels.
The method according to claim 8 or 9, wherein the method further comprises:

The user equipment receives the configuration information of the multicast control channel that is sent by the network device, where the configuration information is carried in a system message, where the configuration information includes at least one of the following:

Narrowband information, the narrowband information is used to indicate sending a narrowband of the multicast control channel, and the narrowband is in one-to-one correspondence with the multicast control channel;

Time information, the time information is used to indicate a time when the multicast control channel is sent, and the time is in one-to-one correspondence with the multicast control channel.
The method according to any one of claims 8 to 10, wherein the user equipment receives configuration information of the multicast control channel sent by the network device, and the configuration information includes at least one of the following:

Covering level information, the coverage level information is used to indicate a number of times of repeatedly transmitting the multicast control channel or the physical downlink control channel of the multicast control channel, the coverage level information and the multicast control channel or the One-to-one correspondence of physical downlink control channels of the multicast control channel;

The service information, where the service information is used to indicate an identifier of the multicast service configured by the multicast control channel, where the service information is in one-to-one correspondence with the multicast control channel;

a wireless network temporary identifier, the wireless network temporary identifier is used to scramble a physical downlink control channel of the multicast control channel, and the wireless network temporary identifier is in one-to-one correspondence with the multicast control channel.
The method according to claim 11, wherein the number of the temporary identifiers of the wireless network may be multiple, and when the number of temporary identifiers of the wireless network is multiple, the plurality of multicast control channels are multiple. The physical downlink control channels are in one-to-one correspondence with the wireless network temporary identifiers.
The method according to claim 11, wherein the number of the temporary identifiers of the wireless network may be one, and when the number of temporary identifiers of the wireless network is one, multiple physicals of the plurality of multicast control channels The downlink control channel is scrambled using the wireless network temporary identity.
The method according to any one of claims 8 to 13, wherein the indication information further comprises bitmap information, the bitmap information includes n bits, and the n bits are used to indicate a corresponding n Whether the multicast control information has changed, and n is a positive integer greater than 1.
The method according to any one of claims 10 to 14, wherein the user equipment receives the changed at least one multicast control information sent by the network device, including at least one of the following:

Determining, by the user equipment, a coverage level of the user equipment, the user equipment receiving the multicast control channel corresponding to a coverage level of the user equipment, where the multicast control channel carries the multicast control information;

Determining, by the user equipment, an identifier of a multicast service of interest, the user equipment receiving service information including an identifier of the multicast service of interest, the user equipment receiving the multicast corresponding to the service information a control channel, the multicast control channel carrying the multicast control information;

Determining, by the user equipment, the narrowband information or the time information of the multicast control channel according to the configuration information, where the user equipment receives the narrowband or time indicated by the narrowband information or the time information Broadcasting a control channel, the multicast control channel carrying the multicast control information;

Determining, by the user equipment, the radio network temporary identifier of the multicast control channel according to the configuration information, where the user equipment receives the multicast control channel by using the radio network temporary identifier, where the multicast control channel bearer The multicast control information;

The user equipment determines the changed multicast control information according to the bitmap information, and the user equipment receives the changed multicast control information.
A network device, comprising: a processor and a transmitter, wherein the processor is configured to perform the following steps:

Transmitting, by the transmitter, a plurality of multicast control information to a user equipment;

And transmitting, by the transmitter, indication information to the user equipment, where the indication information is used to indicate that at least one of the multiple multicast control information is changed, and the multicast control information is carried in a multicast control signal. On the road

Transmitting, by the transmitter, the changed at least one multicast control information to the user equipment;

Transmitting, by the transmitter, at least one multicast communication service data corresponding to the at least one multicast control information to the user equipment.
The network device according to claim 16, wherein the indication information sent by the transmitter to the user equipment is specifically at least one of the following:

Transmitting, by the transmitter, the indication information to the user equipment by using a paging message;

Transmitting, by the transmitter, the indication information to the user equipment by using a physical downlink control channel of one or more multicast control channels;

The indication information is transmitted to the user equipment by the transmitter through a physical downlink control channel of one or more multicast traffic channels.
The network device according to claim 16 or 17, wherein the processor is further configured to:

The configuration information of the multicast control channel is sent to the user equipment by using the transmitter, where the configuration information is carried in a system message, where the configuration information includes at least one of the following:

Narrowband information, the narrowband information is used to indicate sending a narrowband of the multicast control channel, and the narrowband is in one-to-one correspondence with the multicast control channel;

Time information, the time information is used to indicate a time when the multicast control channel is sent, and the time is in one-to-one correspondence with the multicast control channel.
The network device according to any one of claims 16 to 18, wherein the processor is further configured to use the transmitter to send configuration information of the multicast control channel to the user equipment, where the configuration The information includes at least one of the following:

Covering level information, the coverage level information is used to indicate a number of times of repeatedly transmitting the multicast control channel or the physical downlink control channel of the multicast control channel, the coverage level information and the multicast control channel or the One-to-one correspondence of physical downlink control channels of the multicast control channel;

Service information, where the service information is used to indicate an identifier of a service configured by the multicast control channel, where the service information is in one-to-one correspondence with the multicast control channel;

a wireless network temporary identifier, the wireless network temporary identifier is used to scramble a physical downlink control channel of the multicast control channel, and the wireless network temporary identifier is in one-to-one correspondence with the multicast control channel.
The network device according to claim 19, wherein the number of the temporary identifiers of the wireless network may be multiple;

When the number of the temporary identifiers of the wireless network is multiple, the multiple physical downlink control channels of the multiple multicast control channels are in one-to-one correspondence with the temporary identifiers of the wireless network.
The network device according to claim 19, wherein the number of the temporary identifiers of the wireless network may be one, and when the number of temporary identifiers of the wireless network is one, multiple of the plurality of multicast control channels The physical downlink control channel is scrambled using the wireless network temporary identity.
The network device according to any one of claims 16 to 21, wherein the indication information further comprises bitmap information, the bitmap information includes n bits, and the n bits are used to indicate a corresponding n Whether the multicast control information has changed, and n is a positive integer greater than 1.
A user equipment, comprising: a processor and a receiver, wherein the processor is configured to perform the following steps:

Using a plurality of multicast control information sent by the receiver network device;

Receiving, by the receiver, indication information sent by the network device, where the indication information is used to indicate that at least one of the multiple multicast control information is changed, and the multicast control information is carried in the multicast control On the channel;

Receiving, by the receiver, the changed at least one multicast control information sent by the network device;

And receiving, by the receiver, at least one multicast communication service data corresponding to the at least one multicast control information.
The user equipment according to claim 23, wherein the receiving the indication information sent by the network device by using the receiver is specifically at least one of the following:

Receiving, by the receiver, the indication information that is sent by the network device by using a paging message;

Receiving, by the receiver, the indication information that is sent by the network device by using a physical downlink control channel of one or more multicast control channels;

And receiving, by the receiver, the indication information that is sent by the network device by using a physical downlink control channel of one or more multicast traffic channels.
The user equipment according to claim 23 or 24, wherein the processor is further configured to:

The configuration information of the multicast control channel sent by the network device is received by the receiver, where the configuration information is carried in a system message, where the configuration information includes at least one of the following:

Narrowband information, the narrowband information is used to indicate sending a narrowband of the multicast control channel, and the narrowband is in one-to-one correspondence with the multicast control channel;

Time information, the time information is used to indicate a time when the multicast control channel is sent, and the time is in one-to-one correspondence with the multicast control channel.
The user equipment according to any one of claims 23 to 25, wherein the processor receives, by using the receiver, configuration information of the multicast control channel sent by the network device, where the configuration information includes At least one of the following:

Covering level information, the coverage level information is used to indicate a number of times of repeatedly transmitting the multicast control channel or the physical downlink control channel of the multicast control channel, the coverage level information and the multicast control channel or the One-to-one correspondence of physical downlink control channels of the multicast control channel;

The service information, where the service information is used to indicate an identifier of the multicast service configured by the multicast control channel, where the service information is in one-to-one correspondence with the multicast control channel;

a wireless network temporary identifier, the wireless network temporary identifier is used to scramble a physical downlink control channel of the multicast control channel, and the wireless network temporary identifier is in one-to-one correspondence with the multicast control channel.
The user equipment according to claim 26, wherein the number of the temporary identifiers of the wireless network may be multiple, and when the number of temporary identifiers of the wireless network is multiple, the plurality of multicast control channels A plurality of physical downlink control channels are in one-to-one correspondence with the wireless network temporary identifiers.
The user equipment according to claim 26, wherein the number of the temporary identifiers of the wireless network may be one, and when the number of temporary identifiers of the wireless network is one, multiple of the plurality of multicast control channels The physical downlink control channel is scrambled using the wireless network temporary identity.
The user equipment according to any one of claims 23 to 28, wherein the indication information further includes bitmap information, the bitmap information includes n bits, and the n bits are used to indicate a corresponding n Whether the multicast control information has changed, and n is a positive integer greater than 1.
The user equipment according to any one of claims 25 to 29, wherein the processor receives, by using the receiver, the changed at least one multicast control information sent by the network device, including at least the following One:

Determining, by the processor, a coverage level of the user equipment, using the receiver to receive the multicast control channel corresponding to a coverage level of the user equipment, where the multicast control channel carries the multicast control information;

Determining, by the processor, an identifier of a multicast service of interest, receiving, by the receiver, service information including an identifier of the multicast service of interest, and receiving, by the receiver, the service corresponding to the service information Multicast control channel, the multicast control channel carrying the multicast control information;

Determining, by the processor, the narrowband information or the time information of the multicast control channel according to the configuration information, and receiving, by the receiver, the narrowband or time indicated by the narrowband information or the time information Multicast control channel, the multicast control channel carrying the multicast control information;

Determining, by the processor, the wireless network temporary identifier of the multicast control channel according to the configuration information, where the processor uses the wireless network temporary identifier to receive the multicast control channel by using the receiver, The multicast control channel carries the multicast control information;

The processor determines the changed multicast control information according to the bitmap information, and receives the changed multicast control information by using the receiver.
A network device, comprising:

a first sending unit, configured to send a plurality of multicast control information to the user equipment, where the first sending unit is further configured to send, to the user equipment, indication information, where the indication information is used to indicate the multiple multicast control information At least one of the changes is performed, and the multicast control information is carried on a multicast control channel;

a second sending unit, configured to send, to the user equipment, the changed at least one multicast control information;

And a third sending unit, configured to send, to the user equipment, at least one multicast communication service data corresponding to the at least one multicast control information.
The network device according to claim 31, wherein the indication information that is sent by the first sending unit to the user equipment is specifically at least one of the following:

The first sending unit is configured to send the indication information to the user equipment by using a paging message;

The first sending unit is configured to send the indication information to the user equipment by using a physical downlink control channel of one or more multicast control channels;

The first sending unit is configured to send the indication information to the user equipment by using a physical downlink control channel of one or more multicast traffic channels.
The network device according to claim 31 or 32, wherein the network device further comprises:

And a fourth sending unit, configured to send configuration information of the multicast control channel to the user equipment, where the configuration information is carried in a system message, where the configuration information includes at least one of the following:

Narrowband information, the narrowband information is used to indicate sending a narrowband of the multicast control channel, and the narrowband is in one-to-one correspondence with the multicast control channel;

Time information, the time information is used to indicate a time when the multicast control channel is sent, and the time is in one-to-one correspondence with the multicast control channel.
The network device according to any one of claims 31 to 33, wherein the network device includes a fourth sending unit, configured to send configuration information of the multicast control channel to the user equipment, where the configuration information is Also includes at least one of the following:

Covering level information, the coverage level information is used to indicate a number of times of repeatedly transmitting the multicast control channel or the physical downlink control channel of the multicast control channel, the coverage level information and the multicast control channel or the One-to-one correspondence of physical downlink control channels of the multicast control channel;

Service information, where the service information is used to indicate an identifier of a service configured by the multicast control channel, where the service information is in one-to-one correspondence with the multicast control channel;

a wireless network temporary identifier, the wireless network temporary identifier is used to scramble a physical downlink control channel of the multicast control channel, and the wireless network temporary identifier is in one-to-one correspondence with the multicast control channel.
The network device according to claim 34, wherein the number of the temporary identifiers of the wireless network may be multiple;

When the number of the wireless network temporary identifiers is multiple, multiple of the multiple multicast control channels The physical downlink control channel has a one-to-one correspondence with the wireless network temporary identifier.
The network device according to claim 34, wherein the number of the temporary identifiers of the wireless network may be one, and when the number of temporary identifiers of the wireless network is one, multiple of the plurality of multicast control channels The physical downlink control channel is scrambled using the wireless network temporary identity.
The network device according to any one of claims 31 to 36, wherein the indication information further comprises bitmap information, the bitmap information includes n bits, and the n bits are used to indicate a corresponding n Whether the multicast control information has changed, and n is a positive integer greater than 1.
A user equipment, comprising:

a first receiving unit, configured to receive multiple multicast control information sent by the network device, where the first receiving unit is further configured to receive indication information sent by the network device, where the indication information is used to indicate the multiple multicasts At least one of the control information is changed, and the multicast control information is carried on the multicast control channel;

a second receiving unit, configured to receive the changed at least one multicast control information sent by the network device;

And a third receiving unit, configured to receive at least one multicast communication service data corresponding to the at least one multicast control information.
The user equipment according to claim 38, wherein the first receiving unit is configured to receive the indication information sent by the network device, specifically at least one of the following:

The first receiving unit is configured to receive the indication information that is sent by the network device by using a paging message;

The first receiving unit is configured to receive the indication information that is sent by the network device by using a physical downlink control channel of one or more multicast control channels;

The first receiving unit is configured to receive, by the network device, one or more multicast traffic channels And the indication information sent by the downlink control channel.
The user equipment according to claim 38 or 39, wherein the user equipment further comprises:

a fourth receiving unit, configured to receive configuration information of the multicast control channel that is sent by the network device, where the configuration information is carried in a system message, where the configuration information includes at least one of the following:

Narrowband information, the narrowband information is used to indicate sending a narrowband of the multicast control channel, and the narrowband is in one-to-one correspondence with the multicast control channel;

Time information, the time information is used to indicate a time when the multicast control channel is sent, and the time is in one-to-one correspondence with the multicast control channel.
The user equipment according to any one of claims 38 to 40, wherein the network device comprises a fourth receiving unit, configured to receive configuration information of the multicast control channel sent by the network device, The configuration information also includes at least one of the following:

Covering level information, the coverage level information is used to indicate a number of times of repeatedly transmitting the multicast control channel or the physical downlink control channel of the multicast control channel, the coverage level information and the multicast control channel or the One-to-one correspondence of physical downlink control channels of the multicast control channel;

The service information, where the service information is used to indicate an identifier of the multicast service configured by the multicast control channel, where the service information is in one-to-one correspondence with the multicast control channel;

a wireless network temporary identifier, the wireless network temporary identifier is used to scramble a physical downlink control channel of the multicast control channel, and the wireless network temporary identifier is in one-to-one correspondence with the multicast control channel.
The user equipment according to claim 41, wherein the number of the temporary identifiers of the wireless network may be multiple, and when the number of temporary identifiers of the wireless network is multiple, the plurality of multicast control channels A plurality of physical downlink control channels are in one-to-one correspondence with the wireless network temporary identifiers.
The user equipment according to claim 41, wherein the number of the temporary identifiers of the wireless network may be one, and when the number of temporary identifiers of the wireless network is one, multiple of the plurality of multicast control channels The physical downlink control channel is scrambled using the wireless network temporary identity.
The user equipment according to any one of claims 38 to 43, wherein the indication information further comprises bitmap information, the bitmap information includes n bits, and the n bits are used to indicate a corresponding n Whether the multicast control information has changed, and n is a positive integer greater than 1.
The user equipment according to any one of claims 40 to 43, wherein the second receiving unit is configured to receive the changed at least one multicast control information sent by the network device, including at least one of the following Kind:

The second receiving unit is configured to determine a coverage level of the user equipment, and receive the multicast control channel corresponding to a coverage level of the user equipment, where the multicast control channel carries the multicast control information;

The second receiving unit is configured to determine an identifier of the multicast service of interest, receive service information including an identifier of the multicast service of interest, and receive the multicast control channel corresponding to the service information, where The multicast control channel carries the multicast control information;

The second receiving unit is configured to determine, according to the configuration information, the narrowband information or the time information of the multicast control channel, and receive the multiple in a narrowband or time indicated by the narrowband information or the time information. Broadcasting a control channel, the multicast control channel carrying the multicast control information;

The second receiving unit is configured to determine, according to the configuration information, the wireless network temporary identifier of the multicast control channel, and use the wireless network temporary identifier to receive the multicast control channel, where the multicast control channel carries The multicast control information;

The second receiving unit is configured to determine the changed multicast control information according to the bitmap information, and receive the changed multicast control information.
A communication system, comprising: a network device and a user equipment, wherein:

The network device is the network device according to any one of claims 16-22;

The user equipment is the user equipment according to any one of claims 23-30;

or,

The network device is the network device according to any one of claims 31-37;

The user equipment is the user equipment of any one of claims 38-45.
A network device, comprising:

a sending unit, configured to send configuration information of semi-persistent scheduling (SPS) information to the user equipment UE, where the configuration information includes a modification period of the SPS information, and the sending unit is further configured to send the user equipment according to the modification period Transmitting a first physical downlink control channel (first PDCCH), where the first PDCCH includes the SPS information;

And a processing unit, configured to communicate with the user equipment according to the SPS information.
A user equipment (UE), comprising:

a receiving unit, configured to receive configuration information of semi-static scheduling (SPS) information sent by the network device, where the configuration information includes a modification period of the SPS information, and the receiving unit is further configured to receive the network device according to the modification period Transmitting a first physical downlink control channel (first PDCCH), where the first PDCCH includes first SPS information;

And a processing unit, configured to communicate with the network device according to the SPS information.