A method and device for determining control channel change information

Abstract

A method and device for determining control channel change information, the method comprising: a terminal device obtains system information from a network device, the system information including configuration information for receiving a first control channel; the terminal device receives downlink control information according to the system information, the downlink control information including a first bit set and a second bit set, the values ​​corresponding to all bits in the second bit set are 0 or 1, and the first control channel is associated with a first wireless network temporary identifier; when a first condition is met, the terminal device can determine, according to the first bit set, that at least one of N control channels has information changed, the N control channels include the first control channel, and N is a positive integer greater than or equal to 1; wherein the first condition includes that the downlink control information is scrambled by the first wireless network temporary identifier. Therefore, when the control channel information changes, the method can enable the terminal device to determine the change of the control channel information in a timely manner.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a method and device for determining control channel change information. Background Art

[0002] In the Long Term Evolution (LTE) system, network equipment can provide unicast services for terminal devices, and can also provide broadcast-multicast services. Unicast services are mainly point-to-point communications, such as single-point communications between base stations and user equipment (UE), and broadcast-multicast services are mainly point-to-multipoint communications, such as base stations can communicate with multiple UEs at the same time. Broadcast-multicast in the LTE system includes two modes: Multimedia Broadcast Multicast Service (MBMS) and Single Cell Point To Multipoint (SC-PTM). Among them, the static planning of broadcast areas in the MBMS mode is very inflexible and cannot adapt to the flexible broadcast areas and regional adjustments required by emerging broadcast services.

[0003] In the broadcast-multicast mode of LTE SC-PTM, the UE can obtain the configuration information of other SIBs from the System Information Block 1 (SIB) from the network device, and then receive SIB20 in other SIBs according to the configuration information of SIB, and SIB20 includes the configuration information of the Multicast Control Channel (MCCH), such as the detection period of MCCH, etc. Further, the UE can receive MCCH according to the configuration information of MCCH obtained in SIB20, and obtain the configuration information of the Multicast Traffic Channel (MTCH) in MCCH, and the configuration information of MTCH includes the service list carried by MTCH, such as the list of Temporary Mobile Group Identity (TMGI), etc., and the list of Group Radio Network Temporary Identifier (G-RNTI), and TMGI and G-RNTI are one-to-one corresponding. Since the Physical Downlink Shared Channel (PDSCH) carrying MCCH is scheduled by the Physical Downlink Control Channel (PDCCH) of MCCH scrambled by the Single Cell Radio Network Temporary Identifier (SC-RNTI), the UE can detect the PDCCH carrying MTCH according to the G-RNTI, so that the UE can obtain the MTCH information in the PDSCH carrying MTCH according to the detected PDCCH.

[0004] When the network device changes the MCCH information, it sends a PDCCH scrambled by a single-cell wireless network temporary identifier to the UE. Since the format of the downlink control channel carried by the PDCCH is DCI format IC, and the DCI contains less bit information, the network device can use the 8-bit field in the DCI to indicate the MCCH information change, that is, within a repetition period and on the first subframe of a specific wireless frame used to transmit the MCCH, the DCI indicating the MCCH information change is sent to the UE. After receiving the DCI indicating the MCCH information change, the UE starts to receive the MCCH information of the information from the current subframe.

[0005] In the new generation 5G New Ratio (NR) system, since it is not compatible with the functional mode of the LTE system and the DCI format that can be used to carry less bit information in the LTE system is not defined, it is urgent to propose a method for determining the change of MCCH information based on the broadcast multicast mode of LTE SC-PTM for the NR system. Summary of the invention

[0006] A method and device for determining control channel change information, used to determine whether control channel information is changed in an NR system.

[0007] In the first aspect, the present application implements a method for determining control channel change information, which can be described by a terminal device executing the method. The steps of the method include: obtaining system information from a network device, the system information including configuration information for receiving a first control channel; receiving downlink control information according to the system information, the downlink control information including a first bit set and a second bit set, the values ​​corresponding to all bits in the second bit set are 0 or 1, and the first control channel is associated with a first wireless network temporary identifier; when a first condition is met, according to the first bit set, determining that at least one of the N control channels has information changed, the N control channels include the first control channel, and N is a positive integer greater than or equal to 1; wherein the first condition includes that the downlink control information is scrambled by the first wireless network temporary identifier.

[0008] Through this design, the terminal device can obtain system information from the network device, and the system information includes the configuration information of the first control channel. Then, the terminal device can receive downlink control information according to the system information. The downlink control information includes two bit sets, namely the first bit set and the second bit set. The corresponding values ​​of all bits in the second bit set are set to 0 or 1 to reduce the complexity of terminal device detection. The first wireless network temporary identifier is related to the first control channel, and the downlink control information is scrambled with the first wireless network temporary identifier, so that the terminal device can determine that the information of the first control channel has changed according to the first bit set in the downlink control information, and can also determine that the information of other control channels has changed according to the first bit set in the first control information. This not only enables the terminal device to determine the information change of the first control channel in a timely manner, but also makes the system overhead low.

[0009] In a possible implementation manner, the downlink control information is carried in a physical downlink control channel, and a cyclic redundancy check of the physical downlink control channel is scrambled by the first radio network temporary identifier.

[0010] Through this design, the downlink control channel is carried in the physical downlink control channel, so the terminal device can effectively obtain the downlink control information by detecting the physical downlink control channel. In addition, the cyclic redundancy code check of the physical downlink control channel is encrypted by the first wireless network temporary identifier, thereby improving the accuracy of the terminal device in detecting the physical downlink control channel.

[0011] In one possible implementation, when the second condition is met, the bits in the first bit set and / or the second bit set are used to indicate at least one of the following fields: a downlink control information format identifier, and / or a modulation and coding scheme, and / or a new data indication, and / or a redundant version, and / or a hybrid automatic repeat request process number, and / or a downlink allocation indication, and / or a transmission power control command for scheduling a physical uplink control channel, and / or a physical uplink control channel resource indication, and / or a physical downlink shared channel to a hybrid automatic repeat request feedback timing indication; wherein the second condition includes that the downlink control information is scrambled by a cell wireless network temporary identifier.

[0012] Through this design, the fields indicated by the bits in the first bit set and / or the second bit set can be flexibly designed, so that the first bit set and the second bit set can have a wide indication range and higher flexibility.

[0013] In a possible implementation manner, the first bit set includes N bits, and 1 bit of information corresponds to indicating 1 control channel information change, and the value of the 1 bit of information is 1, indicating the corresponding control channel information change, including the following: the value of N is 1, and the first bit set corresponds to 1 bit of the downlink control information format identification field, or 1 bit of the new data indication field; the value of N is 2, and the first bit set corresponds to 2 bits of the redundant version field, or 2 bits of the downlink allocation indication field, or 2 bits of the transmission power control command field for scheduling the physical uplink control channel; the value of N is 3, and the first bit set corresponds to 3 bits of the physical uplink control channel resource indication field, or 3 bits of the physical downlink shared channel to hybrid automatic repeat request feedback timing indication field, or 1 bit of the new data indication field plus 2 bits of the redundant version field; the value of N is 4, and the first bit set corresponds to 4 bits of the hybrid automatic repeat request process number field, or 2 bits of the downlink allocation indication field plus 2 bits of the transmission power control command field for scheduling the physical uplink control channel.

[0014] Through this design, when the first bit set contains N bits, 1 bit of information corresponds to indicating a change in control channel information. When the value of 1 bit of information is 1, indicating that the corresponding control channel information has changed, according to the number of bits N contained in the first bit set, the first bit set can correspond to the bits of any one of a variety of fields. In this solution, the field corresponding to the first bit set can reuse the existing field, and the field bits corresponding to the first bit set can be flexibly determined, so that the use flexibility of the first bit set is higher.

[0015] In a possible implementation manner, the first bit set includes 2*N bit numbers, including one of the following:

[0016] The value of N is 1, and the first bit set corresponds to 2 bits of the redundant version field, or 2 bits of the downlink allocation indication field, or 2 bits of the transmission power control command field for scheduling the physical uplink control channel; the value of N is 2, and the first bit set corresponds to 4 bits of the hybrid automatic repeat request process number field, or 2 bits of the downlink allocation indication field plus 2 bits of the transmission power control command field for scheduling the physical uplink control channel; the value of N is 3, and the first bit set corresponds to 2 bits of the redundant version field plus 4 bits of the hybrid automatic repeat request process number field, or 4 bits of the hybrid automatic repeat request process number field plus 2 bits of the downlink allocation indication field, or the physical uplink control channel resource. 3 bits of the source indication field plus 3 bits of the physical downlink shared channel to the hybrid automatic repeat request feedback timing indication field; the value of N is 4, and the first bit set corresponds to 2 bits of the redundant version field plus 4 bits of the hybrid automatic repeat request process number field plus 2 bits of the downlink allocation indication field; or 4 bits of the hybrid automatic repeat request process number field plus 2 bits of the downlink allocation indication field plus 2 bits of the transmission power control command field for scheduling the physical uplink control channel, or 2 bits of the transmission power control command field for scheduling the physical uplink control channel plus 3 bits of the physical uplink control channel resource indication field plus 3 bits of the physical downlink shared channel to the hybrid automatic repeat request feedback timing indication field.

[0017] Through this design, when the first bit set includes 2*N bits, the first bit set corresponds to bits of any one of a variety of fields, thereby making the use of the first bit set more flexible.

[0018] In a possible implementation, the first bit set includes 2*N bits, and the 2 bits of information correspond to indicating a change in information of a control channel, the 2 bits are arranged in sequence from high to low or from low to high in the first bit set, or the first N bits correspond to N control channels respectively, and the last N bits correspond to N control channels respectively, and each 1 bit in the first N bits and the last N bits constitutes the 2 bits, including one of the following:

[0019] The value corresponding to the lower bit of the two bits is 1, indicating that the control channel information of the control channel corresponding to the two bits is changed due to the arrival of a session or a service, and the value corresponding to the higher bit of the two bits is 1, indicating that the control channel information of the control channel corresponding to the two bits is changed due to modification, change or stop of the session or service; or the value corresponding to the lower bit of the two bits is 1, indicating that the control channel information of the control channel corresponding to the two bits is changed due to modification, change or stop of the session or service, and the value corresponding to the higher bit of the two bits is 1, indicating that the control channel information of the control channel corresponding to the two bits is changed due to the arrival of a session or a service; or

[0020] The values ​​corresponding to the two bits are 00, 01, 10 and 11, which respectively represent six random combinations of four states: the corresponding control channel information has not changed, the control channel information has changed due to the arrival of a session or service, the control channel information has changed due to the stop of a session or service, and the control channel information has changed due to modification or change of a session or service.

[0021] Through this design, when the first bit set contains 2*N bits and the 2-bit information corresponds to indicating a change in 1 control channel information, the network device can flexibly set the position of the 2 bits in the first bit set according to the change in the control channel information, and use the different numerical values ​​corresponding to the 2 bits to respectively represent different reasons for the change in the control channel information, thereby improving the flexibility of the first bit set in indicating the reason for the change in the control channel information.

[0022] In a possible implementation manner, the second bit set includes at least one of the following fields:

[0023] Modulation and coding scheme field, and / or new data indication field, and / or redundant version field, and / or hybrid automatic repeat request process number field, and / or downlink allocation indication field, and / or transmission power control command field for scheduling physical uplink control channel, and / or physical uplink control channel resource indication field, and / or physical downlink shared channel to hybrid automatic repeat request feedback timing indication.

[0024] Through this design, the second bit set includes at least one of the face fields: the modulation and coding scheme field, and / or the new data indication field, and / or the redundant version field, and / or the hybrid automatic repeat request process number field, and / or the downlink allocation indication field, and / or the transmission power control command field for scheduling the physical uplink control channel, and / or the physical uplink control channel resource indication field, and / or the physical downlink shared channel to the hybrid automatic repeat request feedback timing indication, so that the downlink control information not only has the function of indicating the change of the control channel information, but can also be used in other ways, thereby improving the utilization scope of the downlink control information and avoiding additional system overhead.

[0025] In a possible implementation, the configuration information includes at least one of the following: a partial bandwidth of the first control channel, a control resource set of the first control channel, a search space of the first control channel, a wireless network temporary identifier of the first control channel, and a downlink shared physical channel for carrying the first control channel.

[0026] Through this design, the system information includes configuration information of the first control channel, and the configuration information includes at least one of the following: a partial bandwidth of the first control channel, a control resource set of the first control channel, a search space of the first control channel, a wireless network temporary identifier of the first control channel, and a downlink shared physical channel for carrying the first control channel. After receiving the system information, the terminal device can flexibly receive the downlink control information accurately according to the configuration information of the first control channel to further determine the change of the control channel information.

[0027] In the second aspect, an embodiment of the present invention provides a method for determining control channel change information, which can be described by a network device executing the method. The steps of the method include: obtaining configuration information of a first control channel; sending system information to an endpoint device, wherein the system information includes the configuration information of the first control channel; determining that at least one of N control channels has information changed, wherein the N downlink control channels include the first control channel, and the first control channel is associated with a first wireless network temporary identifier; N is a positive integer greater than or equal to 1; sending downlink control information, wherein the downlink control information includes a first bit set and a second bit set, wherein the values ​​corresponding to all bits in the second bit set are 0 or 1, the first bit set is associated with the N control channels, and the first bit set indicates that at least one control channel has information changed, wherein the downlink control information is scrambled by the first wireless network temporary identifier, and N is a positive integer greater than or equal to 1; the network device sends the downlink control information to the terminal device.

[0028] In a possible implementation manner, the downlink control information is carried in a physical downlink control channel, and a cyclic redundancy check of the physical downlink control channel is scrambled by the first radio network temporary identifier.

[0029] In a possible implementation manner, the downlink control information is scrambled by a cell radio network temporary identifier, and bits in the first bit set and / or the second bit set are used to indicate at least one of the following fields:

[0030] Downlink control information format identifier, and / or modulation and coding scheme, and / or new data indication, and / or redundancy version, and / or hybrid automatic repeat request process number, and / or downlink allocation indication, and / or transmission power control command for scheduling physical uplink control channel, and / or physical uplink control channel resource indication, and / or physical downlink shared channel to hybrid automatic repeat request feedback timing indication.

[0031] In a possible implementation manner, the first bit set includes N bits, and one bit of information corresponds to indicating one control channel information change, and the value of the one bit of information is 1 to indicate the corresponding control channel information change, including one of the following:

[0032] The value of N is 1, and the first bit set corresponds to 1 bit of the downlink control information format identification field, or 1 bit of the new data indication field;

[0033] The value of N is 2, and the first bit set corresponds to 2 bits of the redundant version field, or 2 bits of the downlink allocation indication field, or 2 bits of the transmission power control command field for scheduling the physical uplink control channel;

[0034] The value of N is 3, and the first bit set corresponds to 3 bits of the physical uplink control channel resource indication field, or 3 bits of the physical downlink shared channel to hybrid automatic repeat request feedback timing indication field, or 1 bit of the new data indication field plus 2 bits of the redundant version field;

[0035] The value of N is 4, and the first bit set corresponds to 4 bits of the hybrid automatic repeat request process number field, or 2 bits of the downlink allocation indication field plus 2 bits of the transmission power control command field for scheduling the physical uplink control channel.

[0036] In a possible implementation manner, the first bit set includes 2*N bit numbers, including one of the following:

[0037] The value of N is 1, and the first bit set corresponds to 2 bits of the redundant version field, or 2 bits of the downlink allocation indication field, or 2 bits of the transmission power control command field for scheduling the physical uplink control channel;

[0038] The value of N is 2, and the first bit set corresponds to 4 bits of the hybrid automatic repeat request process number field, or 2 bits of the downlink allocation indication field plus 2 bits of the transmission power control command field for scheduling the physical uplink control channel;

[0039] The value of N is 3, and the first bit set corresponds to 2 bits of the redundant version field plus 4 bits of the hybrid automatic repeat request process number field, or 4 bits of the hybrid automatic repeat request process number field plus 2 bits of the downlink allocation indication field, or 3 bits of the physical uplink control channel resource indication field plus 3 bits of the physical downlink shared channel to hybrid automatic repeat request feedback timing indication field;

[0040] The value of N is 4, and the first bit set corresponds to 2 bits of the redundant version field plus 4 bits of the hybrid automatic repeat request process number field plus 2 bits of the downlink allocation indication field; or 4 bits of the hybrid automatic repeat request process number field plus 2 bits of the downlink allocation indication field plus 2 bits of the transmission power control command field for scheduling the physical uplink control channel, or 2 bits of the transmission power control command field for scheduling the physical uplink control channel plus 3 bits of the physical uplink control channel resource indication field plus 3 bits of the physical downlink shared channel to the hybrid automatic repeat request feedback timing indication field.

[0041] In a possible implementation, the first bit set includes 2*N bits, and the 2 bits of information correspond to indicating a change in information of a control channel, the 2 bits are arranged in sequence from high to low or from low to high in the first bit set, or the first N bits correspond to N control channels respectively, and the last N bits correspond to N control channels respectively, and each 1 bit in the first N bits and the last N bits constitutes the 2 bits, including one of the following:

[0042] The value corresponding to the lower bit of the two bits is 1, indicating that the control channel information of the control channel corresponding to the two bits is changed due to the arrival of a session or a service, and the value corresponding to the higher bit of the two bits is 1, indicating that the control channel information of the control channel corresponding to the two bits is changed due to modification, change or stop of the session or service; or the value corresponding to the lower bit of the two bits is 1, indicating that the control channel information of the control channel corresponding to the two bits is changed due to modification, change or stop of the session or service, and the value corresponding to the higher bit of the two bits is 1, indicating that the control channel information of the control channel corresponding to the two bits is changed due to the arrival of a session or a service; or

[0043] The values ​​corresponding to the two bits are 00, 01, 10 and 11, which respectively represent six random combinations of four states: the corresponding control channel information has not changed, the control channel information has changed due to the arrival of a session or service, the control channel information has changed due to the stop of a session or service, and the control channel information has changed due to modification or change of a session or service.

[0044] In a possible implementation manner, the second bit set includes at least one of the following fields:

[0045] Modulation and coding scheme field, and / or new data indication field, and / or redundant version field, and / or hybrid automatic repeat request process number field, and / or downlink allocation indication field, and / or transmission power control command field for scheduling physical uplink control channel, and / or physical uplink control channel resource indication field, and / or physical downlink shared channel to hybrid automatic repeat request feedback timing indication.

[0046] In a possible implementation, the configuration information includes at least one of the following: a partial bandwidth of the first control channel, a control resource set of the first control channel, a search space of the first control channel, a wireless network temporary identifier of the first control channel, and a downlink shared physical channel for carrying the first control channel.

[0047] It should be noted that the effects achieved by the second aspect and possible implementations of the second aspect can refer to the effects achieved by the first aspect and possible implementations of the first aspect, and will not be described in detail here.

[0048] In a third aspect, the present application provides a terminal device, including a communication unit and a processing unit;

[0049] The communication unit is used to obtain system information from the network device, wherein the system information includes configuration information for receiving the first control channel;

[0050] The communication unit is further configured to receive downlink control information according to the system information, the downlink control information comprising a first bit set and a second bit set, values ​​corresponding to all bits in the second bit set are 0 or 1, and the first control channel is associated with a first wireless network temporary identifier;

[0051] The processing unit is used to determine, when a first condition is met, based on the first bit set, that information change occurs on at least one of the N control channels, the N control channels including the first control channel, and N is a positive integer greater than or equal to 1; wherein the first condition includes that the downlink control information is scrambled by a first wireless network temporary identifier.

[0052] In a possible implementation manner, the downlink control information is carried in a physical downlink control channel, and a cyclic redundancy check of the physical downlink control channel is scrambled by the first radio network temporary identifier.

[0053] In one possible implementation, when the second condition is met, the bits in the first bit set and / or the second bit set are used to indicate at least one of the following fields: a downlink control information format identifier, and / or a modulation and coding scheme, and / or a new data indication, and / or a redundant version, and / or a hybrid automatic repeat request process number, and / or a downlink allocation indication, and / or a transmission power control command for scheduling a physical uplink control channel, and / or a physical uplink control channel resource indication, and / or a physical downlink shared channel to a hybrid automatic repeat request feedback timing indication; wherein the second condition includes that the downlink control information is scrambled by a cell wireless network temporary identifier.

[0054] In a possible implementation manner, the first bit set includes N bits, and one bit of information corresponds to indicating one control channel information change, and the value of the one bit of information is 1 to indicate the corresponding control channel information change, including one of the following:

[0055] The value of N is 1, and the first bit set corresponds to 1 bit of the downlink control information format identification field, or 1 bit of the new data indication field;

[0056] The value of N is 2, and the first bit set corresponds to 2 bits of the redundant version field, or 2 bits of the downlink allocation indication field, or 2 bits of the transmission power control command field for scheduling the physical uplink control channel;

[0057] The value of N is 3, and the first bit set corresponds to 3 bits of the physical uplink control channel resource indication field, or 3 bits of the physical downlink shared channel to hybrid automatic repeat request feedback timing indication field, or 1 bit of the new data indication field plus 2 bits of the redundant version field;

[0058] The value of N is 4, and the first bit set corresponds to 4 bits of the hybrid automatic repeat request process number field, or 2 bits of the downlink allocation indication field plus 2 bits of the transmission power control command field for scheduling the physical uplink control channel.

[0059] In a possible implementation manner, the first bit set includes 2*N bit numbers, including one of the following:

[0060] The value of N is 1, and the first bit set corresponds to 2 bits of the redundant version field, or 2 bits of the downlink allocation indication field, or 2 bits of the transmission power control command field for scheduling the physical uplink control channel;

[0061] The value of N is 2, and the first bit set corresponds to 4 bits of the hybrid automatic repeat request process number field, or 2 bits of the downlink allocation indication field plus 2 bits of the transmission power control command field for scheduling the physical uplink control channel;

[0062] The value of N is 3, and the first bit set corresponds to 2 bits of the redundant version field plus 4 bits of the hybrid automatic repeat request process number field, or 4 bits of the hybrid automatic repeat request process number field plus 2 bits of the downlink allocation indication field, or 3 bits of the physical uplink control channel resource indication field plus 3 bits of the physical downlink shared channel to hybrid automatic repeat request feedback timing indication field;

[0063] The value of N is 4, and the first bit set corresponds to 2 bits of the redundant version field plus 4 bits of the hybrid automatic repeat request process number field plus 2 bits of the downlink allocation indication field; or 4 bits of the hybrid automatic repeat request process number field plus 2 bits of the downlink allocation indication field plus 2 bits of the transmission power control command field for scheduling the physical uplink control channel, or 2 bits of the transmission power control command field for scheduling the physical uplink control channel plus 3 bits of the physical uplink control channel resource indication field plus 3 bits of the physical downlink shared channel to the hybrid automatic repeat request feedback timing indication field.

[0064] In a possible implementation, the first bit set includes 2*N bits, and the 2 bits of information correspond to indicating a change in information of a control channel, the 2 bits are arranged in sequence from high to low or from low to high in the first bit set, or the first N bits correspond to N control channels respectively, and the last N bits correspond to N control channels respectively, and each 1 bit in the first N bits and the last N bits constitutes the 2 bits, including one of the following:

[0065] The value corresponding to the lower bit of the two bits is 1, indicating that the control channel information of the control channel corresponding to the two bits is changed due to the arrival of a session or a service, and the value corresponding to the higher bit of the two bits is 1, indicating that the control channel information of the control channel corresponding to the two bits is changed due to modification, change or stop of the session or service; or the value corresponding to the lower bit of the two bits is 1, indicating that the control channel information of the control channel corresponding to the two bits is changed due to modification, change or stop of the session or service, and the value corresponding to the higher bit of the two bits is 1, indicating that the control channel information of the control channel corresponding to the two bits is changed due to the arrival of a session or a service; or

[0066] The values ​​corresponding to the two bits are 00, 01, 10 and 11, which respectively represent six random combinations of four states: the corresponding control channel information has not changed, the control channel information has changed due to the arrival of a session or service, the control channel information has changed due to the cessation of a session or service, and the control channel information has changed due to modification or change of a session or service.

[0067] In a possible implementation manner, the second bit set includes at least one of the following fields:

[0068] Modulation and coding scheme field, and / or new data indication field, and / or redundant version field, and / or hybrid automatic repeat request process number field, and / or downlink allocation indication field, and / or transmission power control command field for scheduling physical uplink control channel, and / or physical uplink control channel resource indication field, and / or physical downlink shared channel to hybrid automatic repeat request feedback timing indication.

[0069] In a possible implementation, the configuration information includes at least one of the following: a partial bandwidth of the first control channel, a control resource set of the first control channel, a search space of the first control channel, a wireless network temporary identifier of the first control channel, and a downlink shared physical channel for carrying the first control channel.

[0070] In a fourth aspect, the present application provides a network device, including: a communication unit, a processing unit;

[0071] The communication unit is used to obtain configuration information of the first control channel;

[0072] The communication unit is further used to send system information to the end point device, wherein the system information includes configuration information of the first control channel;

[0073] The processing unit is configured to determine that information change occurs on at least one control channel among N control channels, wherein the N downlink control channels include the first control channel, and the first control channel is associated with a first wireless network temporary identifier; N is a positive integer greater than or equal to 1;

[0074] The communication unit is also used to send downlink control information, the downlink control information includes a first bit set and a second bit set, the values ​​corresponding to all bits in the second bit set are 0 or 1, the first bit set is associated with the N control channels, and the first bit set indicates that information change occurs in at least one of the control channels, wherein the downlink control information is scrambled by a first wireless network temporary identifier, and N is a positive integer greater than or equal to 1; the downlink control information is sent to the terminal device.

[0075] In a possible implementation manner, the downlink control information is carried in a physical downlink control channel, and a cyclic redundancy check of the physical downlink control channel is scrambled by the first radio network temporary identifier.

[0076] In one possible implementation, the downlink control information is scrambled by a cell radio network temporary identifier, and the bits in the first bit set and / or the second bit set are used to indicate at least one of the following fields: a downlink control information format identifier, and / or a modulation and coding scheme, and / or a new data indication, and / or a redundant version, and / or a hybrid automatic repeat request process number, and / or a downlink allocation indication, and / or a transmission power control command for scheduling a physical uplink control channel, and / or a physical uplink control channel resource indication, and / or a physical downlink shared channel to a hybrid automatic repeat request feedback timing indication.

[0077] In a possible implementation manner, the first bit set includes N bits, and 1 bit of information corresponds to indicating 1 control channel information change, and the value of the 1 bit of information is 1, indicating the corresponding control channel information change, including the following: the value of N is 1, and the first bit set corresponds to 1 bit of the downlink control information format identification field, or 1 bit of the new data indication field; the value of N is 2, and the first bit set corresponds to 2 bits of the redundant version field, or 2 bits of the downlink allocation indication field, or 2 bits of the transmission power control command field for scheduling the physical uplink control channel; the value of N is 3, and the first bit set corresponds to 3 bits of the physical uplink control channel resource indication field, or 3 bits of the physical downlink shared channel to hybrid automatic repeat request feedback timing indication field, or 1 bit of the new data indication field plus 2 bits of the redundant version field; the value of N is 4, and the first bit set corresponds to 4 bits of the hybrid automatic repeat request process number field, or 2 bits of the downlink allocation indication field plus 2 bits of the transmission power control command field for scheduling the physical uplink control channel.

[0078] In one possible implementation, the first bit set includes 2*N bits, including the following: when the value of N is 1, the first bit set corresponds to 2 bits of the redundant version field, or 2 bits of the downlink allocation indication field, or 2 bits of the transmission power control command field for scheduling the physical uplink control channel; when the value of N is 2, the first bit set corresponds to 4 bits of the hybrid automatic repeat request process number field, or 2 bits of the downlink allocation indication field plus 2 bits of the transmission power control command field for scheduling the physical uplink control channel; when the value of N is 3, the first bit set corresponds to 2 bits of the redundant version field plus 4 bits of the hybrid automatic repeat request process number field, or 4 bits of the hybrid automatic repeat request process number field plus the downlink allocation indication field. 2 bits of the indication field, or 3 bits of the physical uplink control channel resource indication field plus 3 bits of the physical downlink shared channel to the hybrid automatic repeat request feedback timing indication field; the value of N is 4, and the first bit set corresponds to 2 bits of the redundant version field plus 4 bits of the hybrid automatic repeat request process number field plus 2 bits of the downlink allocation indication field; or 4 bits of the hybrid automatic repeat request process number field plus 2 bits of the downlink allocation indication field plus 2 bits of the transmission power control command field for scheduling the physical uplink control channel, or 2 bits of the transmission power control command field for scheduling the physical uplink control channel plus 3 bits of the physical uplink control channel resource indication field plus 3 bits of the physical downlink shared channel to the hybrid automatic repeat request feedback timing indication field.

[0079] In a possible implementation, the first bit set includes 2*N bits, and the 2 bits of information correspond to indicating a change in information of a control channel, the 2 bits are arranged in sequence from high to low or from low to high in the first bit set, or the first N bits correspond to N control channels respectively, and the last N bits correspond to N control channels respectively, and each 1 bit in the first N bits and the last N bits constitutes the 2 bits, including one of the following:

[0080] The value corresponding to the lower bit of the two bits is 1, indicating that the control channel information of the control channel corresponding to the two bits is changed due to the arrival of a session or a service, and the value corresponding to the higher bit of the two bits is 1, indicating that the control channel information of the control channel corresponding to the two bits is changed due to modification, change or stop of the session or service; or the value corresponding to the lower bit of the two bits is 1, indicating that the control channel information of the control channel corresponding to the two bits is changed due to modification, change or stop of the session or service, and the value corresponding to the higher bit of the two bits is 1, indicating that the control channel information of the control channel corresponding to the two bits is changed due to the arrival of a session or a service; or

[0081] The values ​​corresponding to the two bits are 00, 01, 10 and 11, which respectively represent six random combinations of four states: the corresponding control channel information has not changed, the control channel information has changed due to the arrival of a session or service, the control channel information has changed due to the cessation of a session or service, and the control channel information has changed due to modification or change of a session or service.

[0082] In one possible embodiment, the second bit set includes at least one of the following fields: a modulation and coding scheme field, and / or a new data indication field, and / or a redundant version field, and / or a hybrid automatic repeat request process number field, and / or a downlink allocation indication field, and / or a transmission power control command field for scheduling a physical uplink control channel, and / or a physical uplink control channel resource indication field, and / or a physical downlink shared channel to hybrid automatic repeat request feedback timing indication.

[0083] In a possible implementation, the configuration information includes at least one of the following: a partial bandwidth of the first control channel, a control resource set of the first control channel, a search space of the first control channel, a wireless network temporary identifier of the first control channel, and a downlink shared physical channel for carrying the first control channel.

[0084] In a fifth aspect, an embodiment of the present application also provides a computer program product comprising instructions, which, when executed on a computer, enables the method provided by the above-mentioned first aspect or any one of the designs to be executed, or enables the method provided by the above-mentioned second aspect or any one of the designs to be executed.

[0085] In a sixth aspect, an embodiment of the present application provides a chip system, which includes a processor for supporting a terminal device to implement the functions involved in the first aspect above.

[0086] In a seventh aspect, an embodiment of the present application provides a chip system, which includes a processor for supporting a base station entity to implement the functions involved in the above-mentioned second aspect.

[0087] In a possible design, the chip system also includes a memory, and the memory is used to store program instructions and data necessary for the communication device. The chip system can be composed of a chip, or can include a chip and other discrete devices.

[0088] In the eighth aspect, an embodiment of the present application also provides a communication system, which includes a terminal device for executing the method provided by the above-mentioned first aspect or any one of the designs, and a network device for executing the method provided by the above-mentioned second aspect or any one of the designs, and a transmission channel for realizing communication between the terminal device and the network device.

[0089] The technical effect that can be achieved in the third aspect can refer to the technical effect description that can be achieved in the first aspect or any one of the designs in the first aspect, and the technical effect that can be achieved in the fourth aspect can refer to the technical effect description that can be achieved in the second aspect or any one of the designs in the second aspect. No further details will be given here. BRIEF DESCRIPTION OF THE DRAWINGS

[0090] Figure 1 A schematic diagram of a communication system to which a method for determining control channel change information provided in an embodiment of the present application may be applicable;

[0091] Figure 2 A schematic diagram of obtaining control channel information in an LTE SC-PTM mode provided in an embodiment of the present application;

[0092] Figure 3 A schematic diagram of a MCCH transmission period provided in an embodiment of the present application;

[0093] Figure 4 A schematic diagram of a flow chart of a method for determining control channel change information provided in an embodiment of the present application;

[0094] Figure 5 This is a schematic diagram of a first example flow chart of a method for determining channel change information provided in an embodiment of the present application;

[0095] Figure 6 This is a simplified flow chart of a first example of a method for determining channel change information provided in an embodiment of the present application;

[0096] Figure 7 This is a schematic diagram of a second example flow chart of a method for determining channel change information provided in an embodiment of the present application;

[0097] Figure 8 This is a simplified flow chart of a second example of a method for determining channel change information provided in an embodiment of the present application;

[0098] Fig. 9 A schematic diagram of the structure of a communication device provided in an embodiment of the present application;

[0099] Fig.10 A schematic diagram of the structure of the communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0100] The embodiments of the present application provide a method and device for determining control channel change information, wherein the method and the device are based on the same or similar technical concepts. Since the principles of solving problems by the method and the device are similar, the implementation of the device and the method can refer to each other, and the repeated parts will not be repeated.

[0101] The at least one involved in the embodiments of the present application includes one or more; wherein, more means greater than or equal to two. In addition, it should be understood that in the description of the present application, the words "first", "second", etc. are only used for the purpose of distinguishing the description, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying an order.

[0102] The terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to be used as limitations on the present application. As used in the specification and appended claims of the present application, the singular expressions "a", "said", "above", "the" and "this" are intended to also include expressions such as "one or more", unless there is a clear contrary indication in the context. It should also be understood that in the embodiments of the present application, "one or more" refers to one or more (including two); "and / or" describes the association relationship of associated objects, indicating that three relationships may exist; for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0103] References to "one embodiment" or "some embodiments" etc. described in this specification mean that a particular feature, structure or characteristic described in conjunction with the embodiment is included in one or more embodiments of the present application. Thus, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear at different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0104] It should be understood that a method for determining control channel change information provided in the present application can be applied to various communication systems, for example, it can be an Internet of Things (IoT) system, a narrowband Internet of Things (NB-IoT) system, a long term evolution (LTE) communication system, or a fifth generation (5G) communication system, or a hybrid architecture of LTE and 5G, or a 5G new radio (NR) system, and new communication systems that will emerge in future communication developments. The 5G communication system described in the present application may include at least one of a non-standalone (NSA) 5G communication system and a standalone (SA) 5G communication system. The communication system may also be a public land mobile network (PLMN) network, a device-to-device (D2D) network, a machine-to-machine (M2M) network, or other networks.

[0105] Among them, the terminal device is an entity on the user side for receiving or transmitting signals. The terminal device can be a device that provides voice and data connectivity to users, for example, a handheld device with wireless connection function, a vehicle-mounted device, etc. The terminal device can also be other processing devices connected to a wireless modem. The terminal device can communicate with one or more core networks through a radio access network (RAN). The terminal device can also be called a wireless terminal, a subscriber unit, a subscriber station, a mobile station, a mobile station, a mobile station, a remote station, an access point, a remote terminal, an access terminal, a user terminal, a user agent, a user device, or a user equipment, etc. The terminal device can be a mobile terminal, such as a mobile phone (or a "cellular" phone) and a computer with a mobile terminal, for example, a portable, pocket-sized, handheld, computer-built-in or vehicle-mounted mobile device, which exchanges language and data with a wireless access network. For example, the terminal device may also be a personal communication service (PCS) phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), and other devices. Common terminal devices include, for example, mobile phones, tablet computers, laptop computers, PDAs, mobile internet devices (MIDs), wearable devices, such as smart watches, smart bracelets, pedometers, etc., but the embodiments of the present application are not limited thereto. The terminal devices involved in the embodiments of the present application may also be terminal devices that appear in the future evolving PLMN, and the embodiments of the present application do not limit the specific technology and specific device form adopted by the terminal devices.

[0106] The network device involved in the embodiments of the present application is mainly an entity on the network side for transmitting or receiving signals. The network device in the embodiments of the present application may be a device in a wireless network, such as a RAN node that connects a terminal to a wireless network. For example, the network device may be an evolutionary Node B (eNB or e-NodeB) in LTE, or a new radio controller (NR controller), a gNode B (gNB) in a 5G system, a centralized unit (CU), a new wireless base station, a radio frequency remote module, a micro base station, a relay, a distributed unit (DU), a home base station, a transmission reception point (TRP) or a transmission point (TP) or any other wireless access network device. The embodiments of the present application do not limit the specific technology and specific device form adopted by the wireless access network device.

[0107] In addition, the wireless access network equipment and terminal equipment can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on the water surface; can also be deployed on aircraft, drones, balloons and satellites in the air. The embodiments of the present application do not limit the application scenarios of the wireless access network equipment and terminal equipment.

[0108] The high-level protocol layer is at least one protocol layer in each protocol layer above the physical layer. Specifically, the high-level protocol layer may be at least one of the following protocol layers: a medium access control (MAC) layer, a radio link control (RLC) layer, a packet data convergence protocol (PDCP) layer, a radio resource control (RRC) layer, and a non-access stratum (NAS). It is understandable that high-level signaling may also be generally equivalent to configuration information.

[0109] Figure 1The architecture of a possible communication system to which a method for determining control channel change information provided in an embodiment of the present application is applicable is shown, and the architecture of the communication system includes: a core network (CN) device 101, a wireless access network device (taking a base station 102 as an example), and a terminal device 103a and a terminal device 103b. For example, the system may include but is not limited to terminal devices 103a and 103b. In the communication system, the base station 102 and the core network device 101 may be connected to communicate by wire, for example, or wirelessly, and the base station 102 and the terminal device 103 may be connected by wireless means, for example, Uu port (air interface), to achieve communication. The core network device 101 and the base station 102 may be independent and different physical devices, or the functions of the core network device 101 and the logical functions of the base station 102 may be integrated on the same physical device, or the functions of part of the core network device 101 and part of the base station 102 may be integrated on one physical device. The terminal devices 103a and 103b may be fixed in position or movable. Figure 1 This is just a schematic diagram. The communication system may also include other network devices, such as wireless relay devices and wireless backhaul devices. Figure 1 The embodiment of the present application does not limit the number of core network devices 101, base stations 102 and terminal devices included in the mobile communication system.

[0110] like Figure 2As shown, the process of obtaining control channel information in LTE SC-PTM mode is described in detail below. The network device is taken as base station 102, and the terminal device is taken as terminal device 103a. When the base station 102 broadcasts system information to the terminal device 103a and / or the terminal device 103b, the terminal device 103a receives the system information block 1 SIB1, and then the terminal device 103a can obtain the configuration information of other SIBs from SIB1, and then receive SIB20 in other SIBs, represented by SIB-X. The SIB-X contains the configuration information of the multicast control channel MCCH, such as the detection period of MCCH, etc. Therefore, the terminal device 103a can obtain the configuration information of MCCH from SIB-X; further, the terminal device 103a can receive MCCH based on the obtained MCCH configuration information, and obtain the configuration information of the multicast service channel MTCH from MCCH. The configuration information of the MTCH includes a list of services carried by the MTCH, such as a temporary mobile group identifier TMGI list and a group wireless network temporary identifier G-RNTI list, and the TMGI and G-RNTI are one-to-one corresponding. Since the physical downlink shared channel PDSCH carrying MCCH is scheduled by the physical downlink control channel PDCCH of MCCH scrambled by the single-cell radio network temporary identifier SC-RNTI, the terminal device 103a can detect the PDCCH carrying MTCH according to G-RNTI, and further obtain the MTCH information in the PDSCH used to carry MTCH according to the detected PDCCH.

[0111] like Figure 3 As shown, in the transmission of MCCH, there are usually repetition periods and modification periods. A modification period includes multiple repetition periods, and the information carried by the MCCH transmitted in multiple repetition periods is the same. However, the change of MCCH information can only occur in a specific wireless frame. When the base station 102 changes the MCCH information, the base station 102 will notify the terminal device of the change of MCCH information in the first subframe used to transmit MCCH within a repetition period. After the terminal device obtains the notification of MCCH change, it will start to receive new MCCH information in the current subframe. It should be understood that before the terminal device obtains the new MCCH information, it uses the previously acquired MCCH information.

[0112] The method in which the base station 102 notifies the terminal device 103a of the MCCH information change includes: the base station 102 can send a PDCCH to the terminal device 103a to notify the terminal device 103a of the MCCH information change. Since the cyclic redundancy check (Cyclic Redundancy Check, CRC) of the PDCCH is scrambled by the single cell notification radio network temporary identifier (Single CellNotification Radio Network Temporary Identifier, SC-N-RNTI), the format of the downlink control information DCI carried by the PDCCH is DCI format 1C, and the DCI contains relatively few bit information, which can be used to notify the terminal device of the MCCH information change. The DCI can include an 8-bit MCCH change notification information field. If the lowest bit in the 8-bit bit mapping is "1", it indicates that the base station 102 changes the MCCH information.

[0113] However, since there is no definition of a DCI format that can be used to carry less bit information in the 5G NR system, and there is no definition of a radio network temporary identifier RNTI that can be used specifically to notify MCCH information changes, the existing MCCH information change notification method is only applicable to the LTE system and cannot be applied to the 5G NR system. Even if the DCI format encrypted by SC-N-RNTI is defined in the 5G NR system, it will make the terminal device more complicated to detect the PDCCH carrying DCI, and will also increase the power consumption of the system.

[0114] It should be understood that in the PDCCH verification in semi-persistent scheduling, the terminal device 103a verifies the downlink semi-persistent scheduling (SemiPersistent Scheduling, SPS) allocation PDCCH for scheduling activation or deactivation. If the terminal device 103a is provided with the SPS PDSCH configuration, and all the fields in Table 1 are set as shown in the table, then the terminal device 103a can complete the verification of the DCI format.

[0115] In addition, in the prior art, for narrowband IoT terminal devices and machine type communication terminal devices, there are mainly two types of MCCH information change notification methods:

[0116] Category 1: Two notification mechanisms for MCCH information changes due to session arrival: 1. The base station includes the notification information in the downlink control information DCI that calls MCCH and is scrambled by SC-RNTI and sends it to the terminal device. After the terminal device receives the notification information, it receives new MCCH information in the current modification period. 2. The base station includes the notification information in the downlink control information DCI that calls MTCH and is scrambled by G-RNTI and sends it to the terminal device. After receiving the notification information, the terminal device receives new MCCH information in the next modification period.

[0117] Category 2: A notification mechanism for MCCH information changes due to ongoing service changes. The base station includes the notification information in the downlink control information DCI that schedules MTCH and is encrypted by G-RNTI and sends it to the terminal device. The terminal device receives the notification information and receives new MCCH information in the next modification period.

[0118] It should be understood that since the bandwidth used by NB-IoT and MTC is smaller, MCCH and MTCH are not transmitted on the same subband. Therefore, this solution can send notification information of MCCH information changes on both the DCI scheduling MCCH and the DCI scheduling MTCH.

[0119] However, since the MCCH change notification information field is added to the DCI for scheduling MCCH, that is, the length of DCI is increased, additional DCI size alignment is required, which increases the complexity of UE detection of DIC. In addition, bits of other fields are reused in the DCI for scheduling MTCH to indicate MCCH change notification information. The terminal device needs to obtain new MCCH information in the next MCCH modification cycle. Therefore, the information transmission delay is large, which is not suitable for broadcast and multicast services with high delay requirements.

[0120] In summary, for the broadcast and multicast services of 5G NR, a new channel information change notification method is urgently needed to efficiently notify the terminal device of the control channel information change.

[0121] Therefore, the present application provides a method for determining control channel change information, in which a terminal device obtains system information from a network device, the system information including configuration information for receiving a first control channel; the terminal device receives downlink control information according to the system information, the downlink control information including a first bit set and a second bit set, the values ​​corresponding to all bits in the second bit set are 0 or 1, and the first control channel is associated with a first wireless network temporary identifier; when a first condition is met, the terminal device can determine, according to the first bit set, that at least one of the N control channels has information changed, the N control channels include the first control channel, and N is a positive integer greater than or equal to 1; wherein the first condition includes that the downlink control information is scrambled by the first wireless network temporary identifier. Therefore, in this method, when the control channel information changes, the terminal device can promptly determine the change in the control channel information.

[0122] The present application embodiment provides a method for determining control channel change information. The method is applicable to but not limited to the following: Figure 1 The architecture of the communication system is shown in Figure 1. Figure 4 As shown, it is a flow chart of a method for determining channel information provided by an embodiment of the present application. Specifically, the method includes the following steps:

[0123] S401: The network device sends system information to the terminal device, and the terminal device receives the system information.

[0124] The system information includes configuration information for receiving the first control channel.

[0125] Optionally, the configuration information includes at least one of the following: a partial bandwidth of the first control channel, a control resource set of the first control channel, a search space of the first control channel, a wireless network temporary identifier of the first control channel, and a downlink shared physical channel for carrying the first control channel.

[0126] Optionally, the first control channel information of the present application may be MCCH information, and the present application does not specifically limit the first control channel information.

[0127] S402: The network device sends downlink control information to the terminal device, and the terminal device receives the downlink control information according to the system information.

[0128] It should be understood that the terminal device can receive downlink control information DCI on the corresponding time-frequency domain resources according to the BWP, CORESET, SS and other information in the first configuration information of the first control channel.

[0129] The downlink control information includes a first bit set and a second bit set, values ​​corresponding to all bits in the second bit set are 0 or 1, and the first control channel is associated with a first wireless network temporary identifier.

[0130] Optionally, the second bit set includes at least one of the following fields: a modulation and coding scheme field, and / or a new data indication field, and / or a redundant version field, and / or a hybrid automatic repeat request process number field, and / or a downlink allocation indication field, and / or a transmission power control command field for scheduling a physical uplink control channel, and / or a physical uplink control channel resource indication field, and / or a physical downlink shared channel to hybrid automatic repeat request feedback timing indication.

[0131] In one implementation, the downlink control information is carried in a physical downlink control channel, and a cyclic redundancy check of the physical downlink control channel is scrambled by the first radio network temporary identifier.

[0132] In an implementation manner, when the downlink control information is scrambled by the first radio network temporary identifier, the first downlink control information may be used to indicate changes in N control channel information.

[0133] In another embodiment, when the downlink control information is encrypted by a cell radio network temporary identifier, the bits in the first bit set and / or the second bit set are used to indicate at least one of the following fields: a downlink control information format identifier, and / or a modulation and coding scheme, and / or a new data indication, and / or a redundant version, and / or a hybrid automatic repeat request process number, and / or a downlink allocation indication, and / or a transmission power control command for scheduling a physical uplink control channel, and / or a physical uplink control channel resource indication, and / or a physical downlink shared channel to a hybrid automatic repeat request feedback timing indication.

[0134] It should be noted that the cell radio network temporary identifier is different from the radio network temporary identifier of the first control channel.

[0135] In one implementation, the first bit set includes N bits, and when one bit of information corresponds to indicating one control channel information change, the value of the one bit of information is 1 to indicate that the corresponding control channel information change includes one of the following situations:

[0136] Case 1: the value of N is 1, and the first bit set corresponds to 1 bit of the downlink control information format identification field, or 1 bit of the new data indication field;

[0137] Case 2: the value of N is 2, and the first bit set corresponds to 2 bits of the redundant version field, or 2 bits of the downlink allocation indication field, or 2 bits of the transmission power control command field for scheduling the physical uplink control channel;

[0138] Case 3: The value of N is 3, and the first bit set corresponds to 3 bits of the physical uplink control channel resource indication field, or 3 bits of the physical downlink shared channel to hybrid automatic repeat request feedback timing indication field, or 1 bit of the new data indication field plus 2 bits of the redundant version field;

[0139] Case 4: The value of N is 4, and the first bit set corresponds to 4 bits of the hybrid automatic repeat request process number field, or 2 bits of the downlink allocation indication field plus 2 bits of the transmission power control command field for scheduling the physical uplink control channel.

[0140] In one implementation, when the first bit set includes 2*N bits, it includes one of the following:

[0141] The value of N is 1, and the first bit set corresponds to 2 bits of the redundant version field, or 2 bits of the downlink allocation indication field, or 2 bits of the transmission power control command field for scheduling the physical uplink control channel;

[0142] The value of N is 2, and the first bit set corresponds to 4 bits of the hybrid automatic repeat request process number field, or 2 bits of the downlink allocation indication field plus 2 bits of the transmission power control command field for scheduling the physical uplink control channel;

[0143] The value of N is 3, and the first bit set corresponds to 2 bits of the redundant version field plus 4 bits of the hybrid automatic repeat request process number field, or 4 bits of the hybrid automatic repeat request process number field plus 2 bits of the downlink allocation indication field, or 3 bits of the physical uplink control channel resource indication field plus 3 bits of the physical downlink shared channel to hybrid automatic repeat request feedback timing indication field;

[0144] The value of N is 4, and the first bit set corresponds to 2 bits of the redundant version field plus 4 bits of the hybrid automatic repeat request process number field plus 2 bits of the downlink allocation indication field; or 4 bits of the hybrid automatic repeat request process number field plus 2 bits of the downlink allocation indication field plus 2 bits of the transmission power control command field for scheduling the physical uplink control channel, or 2 bits of the transmission power control command field for scheduling the physical uplink control channel plus 3 bits of the physical uplink control channel resource indication field plus 3 bits of the physical downlink shared channel to the hybrid automatic repeat request feedback timing indication field.

[0145] In one implementation, the first bit set includes 2*N bits, and the 2 bits of information correspond to indicating a change in information of a control channel, the 2 bits are arranged in sequence from high to low or from low to high in the first bit set, or the first N bits correspond to N control channels respectively, and the last N bits correspond to N control channels respectively, and each 1 bit in the first N bits and the last N bits constitutes the 2 bits, including one of the following:

[0146] The value corresponding to the lower bit of the two bits is 1, indicating that the control channel information of the control channel corresponding to the two bits is changed due to the arrival of a session or service, and the value corresponding to the higher bit of the two bits is 1, indicating that the control channel information of the control channel corresponding to the two bits is changed due to modification, change or stop of the session or service; or the value corresponding to the lower bit of the two bits is 1, indicating that the control channel information of the control channel corresponding to the two bits is changed due to modification, change or stop of the session or service, and the value corresponding to the higher bit of the two bits is 1, indicating that the control channel information of the control channel corresponding to the two bits is changed due to the arrival of a session or service; or,

[0147] The values ​​corresponding to the two bits are 00, 01, 10 and 11, which respectively represent six random combinations of four states: the corresponding control channel information has not changed, the control channel information has changed due to the arrival of a session or service, the control channel information has changed due to the cessation of a session or service, and the control channel information has changed due to modification or change of a session or service.

[0148] S403: The terminal device determines, based on the first bit set, that information change occurs on at least one of the N control channels.

[0149] In one implementation, the N control channels include the first control channel, and N is a positive integer greater than or equal to 1.

[0150] The terminal device may perform the next step according to the reason for the change of the control channel information, for example:

[0151] When the terminal device determines that the notification information of the change of the control channel information is caused by the arrival, modification or change of the session or service, the terminal device receives the PDSCH carrying the new control channel information; when the terminal device determines that the notification information of the change of the control channel information is caused by the termination of the session or service, the terminal device stops receiving the PDSCH carrying the control channel information.

[0152] The following describes in detail a method for determining control channel change information provided by an embodiment of the present application in conjunction with specific embodiments.

[0153] In the first embodiment, based on the above Figure 4A method for determining control channel change information proposed in the present application is described in detail by taking the determination of the state of multicast logical control channel MCCH information as an example. Figure 5 The specific implementation process of this embodiment is as follows:

[0154] S501: The base station sends system information to the terminal device, and the terminal device receives the system information, where the system information includes first configuration information of the multicast logical control channel MCCH.

[0155] Specifically, the system information is other SIBs except SIB1, and other SIBs can be expressed as SIB-X.

[0156] Among them, the first configuration information of MCCH includes at least one of the following: partial bandwidth (BandwidthPart, BWP) of MCCH, MCCH control resource set (Control-Resource Set, CORESET), MCCH search space (SearchSpace, SS), MCCH radio network temporary identifier (MCCH RNTI), and downlink shared physical channel nID (MCCH PDSCH nID) used to carry MCCH.

[0157] It should be understood that the terminal device can receive downlink control information DCI on the corresponding time-frequency domain resources according to the BWP, CORESET, SS and other information in the first configuration information of MCCH.

[0158] It should be noted that step S501 may be an optional step.

[0159] S502: The base station configures downlink control information DCI, which can be used to indicate MCCH information change.

[0160] It should be understood that the cyclic redundancy check CRC of the downlink control information DCI is scrambled by the first wireless network temporary identifier (RNTI), and the DCI contains the second configuration information for scheduling MCCH and the change notification information of MCCH information, the bits corresponding to some fields in the downlink control information DCI are set to "0" or "1", and the first wireless network temporary identifier RNTI corresponds to MCCH.

[0161] Specifically, the DCI is used to schedule the first physical downlink data channel, and the frequency domain resource indication (Frequency Domain Resource Assignment, FDRA) field in the DCI corresponds to a common frequency domain resource, that is, multiple terminal devices are configured with the common frequency domain resource for data transmission.

[0162] Optionally, the second configuration information of the MCCH includes at least one of the following: frequency domain resource indication information and time domain resource indication information. The frequency domain resource indication information and the time domain resource indication information may be used to indicate the frequency domain and time domain resources that may be occupied by the PDSCH carrying the MCCH, respectively.

[0163] Optionally, the format of the DIC may be DCI format 1_0.

[0164] It should be noted that the bits corresponding to some fields in the DCI are set to "0" or "1", and the bits corresponding to the some fields are the second bit set. Referring to Table 1, at least one of the fields listed in Table 1 can constitute the some fields, i.e., the second bit set. For example, the 2 bits corresponding to the Redundancy Version (RV) and the 4 bits corresponding to the HARQ Process Number (HPN) field in Table 1 are all set to "0" or all set to "1". This operation is mainly to improve the success rate of the terminal device in detecting DCI.

[0165] Table 1: Fields with bits set to "0" or "1"

[0166]

[0167]

[0168] When executing S502, the DCI includes information about the change notification of the MCCH, and the information about the change notification of the MCCH is used to notify the terminal device whether the MCCH information is changed. How the base station side specifically sets the change notification information of the MCCH information in the DCI specifically includes the following:

[0169] The bits of notification information used to indicate the change of MCCH information in DCI are used as the first bit set, and the first bit set is a set composed of bits in the existing field, that is, the bits in the first bit set can usually be used to indicate other configuration information. The first bit set can specifically include bits of at least one of the following fields: 1-bit DCI format identifier, 1-bit new data indicator (New Data Indicator, NDI), 2-bit redundancy version (Redundancy Version, RV), 4-bit HARQ process number (HARQ Process Number, HPN), 2-bit downlink assignment index (Downlink Assignment Index, DAI), 2-bit transmission power control (Transmit Power Control, TPC) command for scheduling physical uplink control channel (Physical Uplink Control Channel, PUCCH), 3-bit PUCCH resource indication, 3-bit PDSCH to HARQ feedback timing indication. For example, when DCI is scrambled by C-RNTI, the first bit set can indicate the information of the above-mentioned fields.

[0170] For example, the first bit set of 2 bits includes: a 1-bit DCI format identification field and a 1-bit new data indication field.

[0171] It should be understood that in the embodiment of the present application, the bits in the first bit set may be arranged continuously in the DCI. However, in the DCI, the 1-bit DCI format identifier and the 1-bit new data indication may not be arranged continuously, and there may be bits for indicating other information between the bits corresponding to the two fields, such as the FDRA field; and the 1-bit new data indication and the 2-bit redundant version may be arranged continuously, and there is no bit for indicating other information between the bits corresponding to the two fields.

[0172] The base station sets the number of bits included in the first bit set and the specific MCCH information change notification information, mainly including the following three schemes:

[0173] The first solution: when the number of bits contained in the first bit set is greater than or equal to 1 bit, and only 1 bit can be used to indicate the MCCH information change, the highest or lowest 1 bit in the first bit set can be used to indicate the MCCH information change. For example, the 1 bit is set to "1" to indicate the MCCH information change.

[0174] The reason for the change of MCCH information may be at least one of session or service arrival (start), modification (modification), change (change) and stop (stop).

[0175] It should be noted that when the first bit set contains only one bit, there is no need to distinguish whether the one bit is the highest bit or the lowest bit in the first bit set. The first bit set can be one bit corresponding to the DCI format identification field, or one bit corresponding to the NDI field. Therefore, the base station side can use any one of the one-bit fields to indicate the MCCH information change.

[0176] The second scheme: when the number of bits included in the first bit set is greater than or equal to 2 bits, and only 2 bits and bit mapping can be used to indicate the MCCH information change, the 2 bits can be the highest 2 bits in the first bit set or the lowest 2 bits. The specific scheme includes the following 2 configuration methods:

[0177] Method 1: The first bit set contains 2 bits for indicating MCCH information changes, wherein the lowest bit is set to "1" to indicate MCCH information changes caused by session or service arrival; the highest bit is set to "1" to indicate MCCH information changes caused by session or service modification, change or termination.

[0178] Method 2: The first bit set contains 2 bits for indicating MCCH information changes, wherein the lowest bit is set to "1" to indicate MCCH information changes caused by session or service modification, change or termination; the highest bit is set to "1" to indicate MCCH information changes caused by session or service arrival.

[0179] It should be noted that when the first bit set contains only 2 bits, there is no need to distinguish whether the 2 bits are the highest 2 bits or the lowest 2 bits in the first bit set. The first bit set can be the 2 bits corresponding to the RV field, or the 2 bits corresponding to the DAI field, or the 2 bits corresponding to the TPC command field for scheduling PUCCH. Therefore, the base station side can use any of the 2-bit fields to indicate the MCC information change.

[0180] The third solution: For the second solution, the number of bits included in the first bit set is greater than or equal to 2 bits, and when only 2 bits and their corresponding values ​​can be used to indicate that the MCCH information is changed, the 2 bits can be the highest 2 bits or the lowest 2 bits in the first bit set. The specific solution can also include the following 6 configuration methods:

[0181] Method 1: The value corresponding to the two bits is "00", indicating that the MCCH information has not changed; "01", indicating that the MCCH information has changed due to the arrival of a session or service; "10", indicating that the MCCH information has changed due to modification or change of the session or service; and "11", indicating that the MCCH information has changed due to the termination of a session or service.

[0182] Method 2: The value corresponding to the 2 bits is "00", indicating that the MCCH information has not been changed; "01", indicating that the MCCH information has been changed due to the arrival of a session or service; "10", indicating that the MCCH information has been changed due to the termination of a session or service; and "11", indicating that the MCCH information has been changed due to modification or change of a session or service.

[0183] Method three: The value corresponding to the two bits is "00", indicating that the MCCH information has not been changed; "01", indicating that the MCCH information has been changed due to modification or change of the session or service; "10", indicating that the MCCH information has been changed due to the arrival of the session or service; and "11", indicating that the MCCH information has been changed due to the termination of the session or service.

[0184] Method 4: - The value corresponding to the 2 bits is "00", indicating that the MCCH information has not been changed, "01", indicating that the MCCH information has been changed due to modification or change of the session or service, "10", indicating that the MCCH information has been changed due to termination of the session or service, and "11", indicating that the MCCH information has been changed due to the arrival of a session or service.

[0185] Method 5: The value corresponding to the two bits is "00", indicating that the MCCH information has not been changed; "01", indicating that the MCCH information has been changed due to the termination of the session or service; "10", indicating that the MCCH information has been changed due to the arrival of the session or service; and "11", indicating that the MCCH information has been changed due to modification or change of the session or service.

[0186] Method six: The value corresponding to the two bits is "00", indicating that the MCCH information has not changed; "01", indicating that the MCCH information has changed due to session or service termination; "10", indicating that the MCCH information has changed due to session or service modification or change; and "11", indicating that the MCCH information has changed due to session or service arrival.

[0187] It should be noted that in the third solution, when the first bit set contains only 2 bits, there is no need to distinguish whether the 2 bits are the highest 2 bits or the lowest 2 bits in the first bit set. The first bit set can be the 2 bits corresponding to the RV field, or the 2 bits corresponding to the DAI field, or the 2 bits corresponding to the TPC command field for scheduling PUCCH. The base station side can use any of the 2-bit fields to indicate the MCC information change.

[0188] S503: The base station sends downlink control information DCI to the terminal device, and the terminal device receives the downlink control information DCI according to the first configuration information of the MCCH.

[0189] S504: The terminal device obtains the change notification information of the MCCH information according to the received downlink control information DCI.

[0190] Specifically, when the terminal device executes step S503, referring to the three schemes configured by the base station in the above step S502, after the terminal device receives the DCI, it corresponds to the following three situations:

[0191] Case 1: When the base station configures the downlink control information DCI including the change notification information of MCCH information according to the first scheme, after the terminal device receives the DCI sent by the base station, it can determine the MCCH information change based on the highest or lowest 1 bit information in the first bit set corresponding to the DCI. For example, when the terminal device determines that the highest or lowest 1 bit in the first bit set corresponds to "1", it determines that the MCCH information change is made.

[0192] Case 2: When the base station configures the downlink control information DCI including the change notification information of MCCH information according to the second scheme, after the terminal device receives the DCI sent by the base station, it can determine the MCCH information change and the reason for the MCCH information change based on the highest or lowest 2 bits of information in the first bit set corresponding to the DCI.

[0193] Specifically, the terminal device determines the MCCH information change and the reason for the MCCH information change according to the information of the highest or lowest 2 bits in the first bit set corresponding to the DCI, which may include the following two specific results:

[0194] Result 1: If the lowest bit of the 2 bits used to indicate the MCCH information change is set to "1", the terminal device determines that the MCCH information change is due to the arrival of a session or service. If the highest bit of the 2 bits used to indicate the MCCH information change is set to "1", the terminal device determines that the MCCH information change is due to modification, change or termination of the session or service.

[0195] Result 2: If the lowest bit of the 2 bits used to indicate the MCCH information change is set to "1", the terminal device determines that the MCCH information change is due to session or service modification, change or termination. If the highest bit of the 2 bits used to indicate the MCCH information change is set to "1", the terminal device determines that the MCCH information change is due to session or service arrival.

[0196] Case 3: When the base station configures the downlink control information DCI to include the change notification information of the MCCH information according to the third solution, after the terminal device receives the DCI sent by the base station, it can determine the change of the MCCH information and the reason for the change of the MCCH information according to the information of the highest or lowest 2 bits in the first bit set corresponding to the DCI, which specifically includes the following six results:

[0197] Result 1: When the value corresponding to the 2 bits is "00", the terminal device determines that the MCCH information has not changed; when the value corresponding to the 2 bits is "01", the terminal device determines that the MCCH information has changed due to the arrival of a session or service; when the value corresponding to the 2 bits is "10", the terminal device determines that the MCCH information has changed due to modification or change of the session or service; when the value corresponding to the 2 bits is "11", the terminal device determines that the MCCH information has changed due to the termination of the session or service.

[0198] Result 2: When the value corresponding to the 2 bits is "00", the terminal device determines that the MCCH information has not changed; when the value corresponding to the 2 bits is "01", the terminal device determines that the MCCH information has changed due to the arrival of a session or service; when the value corresponding to the 2 bits is "10", the terminal device determines that the MCCH information has changed due to the termination of the session or service; when the value corresponding to the 2 bits is "11", the terminal device determines that the MCCH information has changed due to modification or change of the session or service.

[0199] Result three: When the value corresponding to the two bits is "00", the terminal device determines that the MCCH information has not changed; when the value corresponding to the two bits is "01", the terminal device determines that the MCCH information has changed due to modification or change of the session or service; when the value corresponding to the two bits is "10", the terminal device determines that the MCCH information has changed due to the arrival of the session or service; when the value corresponding to the two bits is "11", the terminal device determines that the MCCH information has changed due to the termination of the session or service.

[0200] Result four: When the value corresponding to the two bits is "00", the terminal device determines that the MCCH information has not changed; when the value corresponding to the two bits is "01", the terminal device determines that the MCCH information has changed due to modification or change of the session or service; when the value corresponding to the two bits is "10", the terminal device determines that the MCCH information has changed due to termination of the session or service; when the value corresponding to the two bits is "11", the terminal device determines that the MCCH information has changed due to the arrival of a session or service.

[0201] Result five: When the value corresponding to the two bits is "00", the terminal device determines that the MCCH information has not changed; when the value corresponding to the two bits is "01", the terminal device determines that the MCCH information has changed due to the termination of the session or service; when the value corresponding to the two bits is "10", the terminal device determines that the MCCH information has changed due to the arrival of the session or service; when the value corresponding to the two bits is "11", the terminal device determines that the MCCH information has changed due to modification or change of the session or service.

[0202] Result six: When the value corresponding to the two bits is "00", the terminal device determines that the MCCH information has not changed; when the value corresponding to the two bits is "01", the terminal device determines that the MCCH information has changed due to the termination of the session or service; when the value corresponding to the two bits is "10", the terminal device determines that the MCCH information has changed due to modification or change of the session or service; when the value corresponding to the two bits is "11", the terminal device determines that the MCCH information has changed due to the arrival of the session or service.

[0203] It should be noted that for the second and third schemes in S502 above, the first bit set contains only 2 bits, so there is no need to distinguish whether the 2 bits are the highest 2 bits or the lowest 2 bits in the first bit set. The first bit set can be the 2 bits corresponding to the RV field, or the 2 bits corresponding to the DAI field, or the 2 bits corresponding to the TPC command field for scheduling PUCCH. After receiving the DCI, the terminal device can determine the MCCH information change based on any of the 2-bit field information.

[0204] S505: The terminal device receives the physical downlink data channel carrying MCCH or stops receiving the physical downlink data channel carrying MCCH according to the change notification information of the MCCH information.

[0205] Specifically, when executing step S505, when the terminal device determines that the change notification information of the MCCH information is caused by the arrival or modification or change of a session or service, the terminal device receives a PDSCH carrying new MCCH information;

[0206] When the terminal device determines that the change notification information of the MCCH information is caused by the termination of the session or service, the terminal device stops receiving the PDSCH carrying the MCCH information.

[0207] The above steps S501-S505 can refer to Figure 6 A simplified diagram of the process is shown.

[0208] In summary, in this implementation, the base station can reuse the bit information of the existing field in the DCI for scheduling MCCH to indicate the MCCH information change to the terminal device, thereby eliminating the need to introduce a new DCI format to increase the detection complexity of the terminal device, and the solution keeps the size of the original DCI unchanged, which can reduce the operation of aligning the additional DCI size. In addition, the solution only uses the DCI for scheduling MCCH to notify the terminal device of the MCCH information change, so the terminal device can quickly receive the changed MCCH information.

[0209] In the second embodiment, based on the above Figure 4 A method for determining control channel change information proposed in the present application is described in detail by taking the state of determining the first multicast logical control channel MCCH#1 information and the second multicast logical control channel MCCH#2 information as an example. Figure 7 The specific implementation process of this embodiment is as follows:

[0210] S701: The base station sends system information to the terminal device, and the terminal device receives the system information, where the system information includes first configuration information of the first multicast logical control channel MCCH#1.

[0211] Specifically, the system information is other SIBs except SIB1, which can be expressed as SIB-X.

[0212] Among them, the first configuration information of MCCH#1 includes at least one of the following: partial bandwidth (BandwidthPart, BWP) of MCCH#1, control resource set (Control-Resource Set, CORESET) of MCCH#1, search space (Search Space, SS) of MCCH#1, radio network temporary identifier (MCCH RNTI) of MCCH#1, and downlink shared physical channel nID (MCCH PDSCH nID) used to carry MCCH#1.

[0213] S702: The base station configures downlink control information DCI, which can be used to indicate MCCH information change.

[0214] It should be understood that the cyclic redundancy check CRC of the downlink control information DCI is scrambled by the first radio network temporary identifier (RNTI), and the DCI includes the second configuration information for scheduling MCCH#1 and the change notification information of MCCH#1 information, as well as the change notification information of MCCH#2 information. The bits corresponding to some fields in the downlink control information DCI are set to "0" or "1", and the first radio network temporary identifier RNTI corresponds to MCCH#1.

[0215] Specifically, the DCI is used to schedule the first physical downlink data channel, and the frequency domain resource indication (Frequency Domain Resource Assignment, FDRA) field in the DCI corresponds to a common frequency domain resource, that is, multiple terminal devices are configured with the common frequency domain resource for data transmission.

[0216] Optionally, the second configuration information of MCCH#1 includes at least one of the following: frequency domain resource indication information and time domain resource indication information.

[0217] Optionally, the format of the DIC may be DCI format 1_0.

[0218] It should be noted that the bits corresponding to some fields in the DCI are set to "0" or "1". Referring to Table 1, at least one of the fields listed in Table 1 can constitute the partial fields. For example, the 2 bits corresponding to the Redundancy Version (RV) and the 4 bits corresponding to the HARQ Process Number (HPN) field in Table 1 are all set to "0" or "1". This operation is mainly to improve the success rate of the terminal device in detecting DCI.

[0219] When the base station executes S702, the DCI includes information about the change notification of MCCH#1 information and information about the change notification of MCCH#2 information. The information about the change notification of MCCH#1 information is used to notify the terminal device whether the first multicast logical control channel MCCH#1 information is changed, and the information about the change notification of MCCH#2 information is used to notify the terminal device whether the second multicast logical control channel MCCH#2 information is changed. How the base station side specifically sets the change notification information of MCCH#1 information and MCCH#2 information in the DCI may include the following:

[0220] The bits of notification information for indicating changes in MCCH#1 information and MCCH#2 information in the DCI are used as the first bit set, that is, the bits in the first bit set can generally be used to indicate other configuration information. The first bit set may specifically include bits of at least one of the following fields: 1-bit DCI format identifier, 1-bit New Data Indicator (NDI), 2-bit Redundancy Version (RV), 4-bit HARQ Process Number (HPN), 2-bit Downlink Assignment Index (DAI), 2-bit Transmit Power Control (TPC) command for scheduling Physical Uplink Control Channel (PUCCH), 3-bit PUCCH resource indication, and 3-bit PDSCH to HARQ feedback timing indication.

[0221] The description and examples of the first bit set may refer to the above step S502, which will not be described in detail here.

[0222] The base station sets the number of bits included in the first bit set and the specific MCCH information change notification information, mainly including the following three schemes:

[0223] The first solution: when the number of bits included in the first bit set is greater than or equal to 1*N bits (N is a positive integer greater than 1), the highest or lowest N bits in the first bit set can be used to indicate changes in MCCH#1 information to MCCH#N information, respectively. If one bit is set to "1", it indicates that the MCCH information corresponding to the bit has been changed.

[0224] The reason for the change of MCCH information may be at least one of session or service arrival (start), modification (modification), change (change) and stop (stop).

[0225] It should be noted that in the first solution, when the first bit set contains only 2 bits, there is no need to distinguish whether the 2 bits are the highest 2 bits or the lowest 2 bits in the first bit set. The first bit set is the 2 bits corresponding to the RV field, or the 2 bits corresponding to the DAI field, or the 2 bits corresponding to the TPC command field of the scheduling PUCCH; the base station can use the 2 bits to indicate changes to the MCCH#1 information and the MCCH#2 information respectively.

[0226] It should be noted that in the first solution, the first bit set only contains 3 bits, so it is no longer necessary to distinguish whether these 3 bits are the highest 3 bits or the lowest 3 bits in the first bit set. The first bit set is 3 bits corresponding to the PUCCH resource indication field, or 3 bits corresponding to the PDSCH to HARQ feedback timing indication field, or 1 bit corresponding to the new data indication field and 2 bits corresponding to the redundant version field. The base station can use these 3 bits to indicate changes in MCCH#1 information, MCCH#2 information, and MCCH#3 information respectively.

[0227] It should be noted that in the first solution, the first bit set only contains 4 bits, so it is no longer necessary to distinguish whether the 4 bits are the highest 4 bits or the lowest 4 bits in the first bit set. The first bit set is 4 bits corresponding to the HARQ process number field, or 2 bits corresponding to the downlink allocation indication field and 2 bits corresponding to the transmission power control command field of the physical uplink control channel scheduling. The base station can use the 4 bits to indicate changes in MCCH#1 information, MCCH#2 information, MCCH#3 information, and MCCH#4 information respectively.

[0228] The first solution may refer to the first solution of step S502 above, which will not be described in detail here.

[0229] The second scheme: when the number of bits included in the first bit set is greater than or equal to 2*N bits (N is a positive integer greater than 1), and only 2*N bits and bit mapping are used to indicate changes in N MCCH information (i.e., MCCH#1 information to MCCH#N), the 2*N bits are the highest 2*N bits or the lowest 2*N bits in the first bit set, and the upper N bits of the 2*N bits correspond one-to-one to the N MCCHs, respectively, and the lower N bits also correspond one-to-one to the N MCCHs, respectively.

[0230] For example, N=4, the first bit set includes 8 bits, and the bits are numbered from 1 to 8. Bits numbered 1 and 5 correspond to the first control channel, bits numbered 2 and 6 correspond to the second control channel, bits numbered 3 and 7 correspond to the third control channel, and bits numbered 4 and 8 correspond to the fourth control channel.

[0231] The specific solution includes the following two configuration methods:

[0232] Method 1: The high-order N bits of the 2*N bits are "1", indicating that the MCCH information corresponding to the bit (for example, MCCH#1 information) is changed due to the arrival of a session or service, and the low-order N bits are "1", indicating that the MCCH information corresponding to the bit (for example, MCCH#2 information) is changed due to modification, change or termination of the session or service.

[0233] Method 2: The high-order N bits of the 2*N bits are "1", indicating that the MCCH information corresponding to the bit (for example, MCCH#2 information) is changed due to modification, change or termination of the session or service, and the low-order N bits are "1", indicating that the MCCH information corresponding to the bit (for example, MCCH#1 information) is changed due to the arrival of the session or service.

[0234] Alternatively, every two adjacent bits in the 2*N bits correspond to one MCCH information, and are arranged in sequence from high to low or from low to high in the first bit set.

[0235] For example, N=4, the first bit set includes 8 bits, and the bits are numbered from 1 to 8. Bits numbered 1 and 2 correspond to the first control channel, bits numbered 3 and 4 correspond to the second control channel, bits numbered 5 and 6 correspond to the third control channel, and bits numbered 7 and 8 correspond to the fourth control channel.

[0236] The specific solution includes the following two configuration methods:

[0237] Method three: If the high-order bit in each of the two bits is "1", it indicates that the MCCH information corresponding to the bit (for example, MCCH#1 information) has changed due to the arrival of a session or service; if the low-order bit is "1", it indicates that the MCCH information corresponding to the bit (for example, MCCH#2 information) has changed due to modification, change or termination of the session or service.

[0238] Method 4: If the high-order bit in each of the two bits is "1", it indicates that the MCCH information corresponding to the bit (for example, MCCH#2 information) has changed due to modification, change or termination of the session or service; if the low-order bit is "1", it indicates that the MCCH information corresponding to the bit (for example, MCCH#1 information) has changed due to the arrival of the session or service.

[0239] It should be noted that in the second solution, the first bit set only includes 2*2 bits (i.e., 4 bits), and there is no need to distinguish whether the 2*2 bits are the highest 2*2 bits or the lowest 2*2 bits in the first bit set. The first bit set is 4 bits corresponding to the HARQ process number field, or 2 bits corresponding to the downlink allocation indication field and 2 bits corresponding to the transmission power control command field of the scheduling physical uplink control channel.

[0240] It should be noted that in the second solution, the first bit set only includes 2*3 bits (i.e., 6 bits), so there is no need to distinguish whether the 2*3 bits are the highest 2*3 bits or the lowest 2*3 bits in the first bit set. The first bit set is 6 bits composed of 2 bits corresponding to the RV field and 4 bits corresponding to the HARQ process number field, or 6 bits composed of 4 bits corresponding to the HARQ process number field and 2 bits corresponding to the DAI field, or 6 bits composed of 3 bits corresponding to the physical uplink control channel resource indication field and 3 bits corresponding to the physical downlink shared channel to hybrid automatic repeat request feedback timing indication field.

[0241] It should be noted that in the second solution, the first bit set only includes 2*4 bits (i.e., 8 bits), so there is no need to distinguish whether the 2*4 bits are the highest 2*4 bits or the lowest 2*4 bits in the first bit set. The first bit set is 8 bits composed of 2 bits corresponding to the RV field, 4 bits corresponding to the HARQ process number field, and 2 bits corresponding to the DAI field, or 8 bits composed of 4 bits corresponding to the hybrid automatic repeat request process number field, 2 bits of the downlink allocation indication field, and 2 bits corresponding to the transmission power control command field for scheduling the physical uplink control channel, or 8 bits composed of 2 bits corresponding to the transmission power control command field for scheduling the physical uplink control channel, 3 bits corresponding to the physical uplink control channel resource indication field, and 3 bits corresponding to the physical downlink shared channel to the hybrid automatic repeat request feedback timing indication field.

[0242] The third solution: for the second solution, when the number of bits contained in the first bit set is greater than or equal to 2*2 bits (i.e., 4 bits), and only 2*2 bits and bit mapping are used to indicate the change of 2 MCCH information (i.e., MCCH#1 information and MCCH#2 information), the 2 bits corresponding to each MCCH,

[0243] When the number of bits included in the first bit set is greater than or equal to 2*2 bits, and only 2 bits and their corresponding values ​​can be used to indicate the change of MCCH information, the 2*2 bits can be the highest 2*2 bits or the lowest 2*2 bits in the first bit set. Specifically, for the 2 bits corresponding to an MCCH information, the following 6 configuration modes can also be included:

[0244] It should be understood that in the embodiment of the present application, the 6 configuration modes of the 2 bits corresponding to the MCCH#1 information and the 6 configuration modes of the 2 bits corresponding to the MCCH#2 information can refer to each other. The embodiment of the present application takes the 2 bits corresponding to the MCCH#1 information as an example for introduction:

[0245] Method 1: The value corresponding to the two bits is "00", indicating that the MCCH#1 information has not changed; "01", indicating that the MCCH#1 information has changed due to the arrival of a session or service; "10", indicating that the MCCH#1 information has changed due to modification or change of the session or service; and "11", indicating that the MCCH#1 information has changed due to the termination of a session or service.

[0246] Method 2: The value corresponding to the two bits is "00", indicating that the MCCH#1 information has not changed; "01", indicating that the MCCH#1 information has changed due to the arrival of a session or service; "10", indicating that the MCCH#1 information has changed due to the termination of a session or service; and "11", indicating that the MCCH#1 information has changed due to modification or change of a session or service.

[0247] Method three: The value corresponding to the two bits is "00", indicating that the MCCH#1 information has not changed; "01", indicating that the MCCH#1 information has changed due to modification or change of the session or service; "10", indicating that the MCCH#1 information has changed due to the arrival of the session or service; and "11", indicating that the MCCH#1 information has changed due to the termination of the session or service.

[0248] Method 4: - The value corresponding to the 2 bits is "00", indicating that the MCCH#1 information has not changed, "01", indicating that the MCCH#1 information has changed due to modification or change of the session or service, "10", indicating that the MCCH#1 information has changed due to termination of the session or service, and "11", indicating that the MCCH#1 information has changed due to the arrival of a session or service.

[0249] Method 5: The value corresponding to the two bits is "00", indicating that the MCCH#1 information has not changed; "01", indicating that the MCCH#1 information has changed due to the termination of the session or service; "10", indicating that the MCCH#1 information has changed due to the arrival of the session or service; and "11", indicating that the MCCH#1 information has changed due to the modification or change of the session or service.

[0250] Method six: The value corresponding to the two bits is "00", indicating that the MCCH#1 information has not changed; "01", indicating that the MCCH#1 information has changed due to the session or service termination; "10", indicating that the MCCH#1 information has changed due to the session or service modification or change; and "11", indicating that the MCCH#1 information has changed due to the session or service arrival.

[0251] It should be noted that the third solution in step S702 may also refer to the third solution in the above step S502.

[0252] It should be noted that in the third solution, the first bit set only includes 2*2 bits (i.e., 4 bits), and there is no need to distinguish whether the 2*2 bits are the highest 2*2 bits or the lowest 2*2 bits in the first bit set. The first bit set is 4 bits corresponding to the HARQ process number field, or 2 bits corresponding to the downlink allocation indication field and 2 bits corresponding to the transmission power control command field of the scheduling physical uplink control channel.

[0253] It should be noted that in the third solution, the first bit set only includes 2*3 bits (i.e., 6 bits), so there is no need to distinguish whether the 2*3 bits are the highest 2*3 bits or the lowest 2*3 bits in the first bit set. The first bit set is 6 bits composed of 2 bits corresponding to the RV field and 4 bits corresponding to the HARQ process number field, or 6 bits composed of 4 bits corresponding to the HARQ process number field and 2 bits corresponding to the DAI field, or 6 bits composed of 3 bits corresponding to the physical uplink control channel resource indication field and 3 bits corresponding to the physical downlink shared channel to hybrid automatic repeat request feedback timing indication field.

[0254] It should be noted that in the third solution, the first bit set only includes 2*4 bits (i.e., 8 bits), so there is no need to distinguish whether the 2*4 bits are the highest 2*4 bits or the lowest 2*4 bits in the first bit set. The first bit set is 8 bits composed of 2 bits corresponding to the RV field, 4 bits corresponding to the HARQ process number field, and 2 bits corresponding to the DAI field, or 8 bits composed of 4 bits corresponding to the hybrid automatic repeat request process number field, 2 bits of the downlink allocation indication field, and 2 bits corresponding to the transmission power control command field for scheduling the physical uplink control channel, or 8 bits composed of 2 bits corresponding to the transmission power control command field for scheduling the physical uplink control channel, 3 bits corresponding to the physical uplink control channel resource indication field, and 3 bits corresponding to the physical downlink shared channel to the hybrid automatic repeat request feedback timing indication field.

[0255] The third solution in step S702 may also refer to the second solution in step S702, which will not be described in detail here.

[0256] S703: The base station sends downlink control information DCI to the terminal device, and the terminal device receives the downlink control information DCI according to the first configuration information of the MCCH.

[0257] S704: The terminal device obtains the change notification information of the MCCH information according to the received downlink control information DCI.

[0258] Specifically, when the terminal device executes step S703, referring to the three schemes configured by the base station in the above step S702, after the terminal device receives the DCI, it corresponds to the following three situations:

[0259] Case 1: When the base station configures the change notification information of the downlink control information DCI including the MCCH#1 information and the MCCH#2 information according to the first scheme in the above step S702, after the terminal device receives the DCI sent by the base station, it can determine the corresponding MCCH#1 information and MCCH#2 information changes respectively according to the highest or lowest 2 bits of information in the first bit set corresponding to the DCI.

[0260] Case 2: When the base station configures the change notification information including MCCH#1 information and MCCH#2 information in the downlink control information DCI according to the second scheme in the above step S702, after the terminal device receives the DCI sent by the base station, it can be based on the highest or lowest 4 bits of information in the first bit set corresponding to the DCI, where 2 bits correspond to indicating a MCCH information change and the reason for the MCCH information change, for example, 2 bits of the 4 bits correspond to indicating a MCCH#1 information change and the reason for the MCCH#1 information change, and the other 2 bits of the 4 bits correspond to indicating a MCCH#2 information change and the reason for the MCCH#2 information change.

[0261] Specifically, the terminal device indicates the corresponding MCCH information change and the reason for the MCCH information change for every 2 bits, which may include the following two specific results. Here, you can refer to the situation 2 in the above step S504, and no further details will be given here.

[0262] Case 3: When the base station configures the change notification information of the MCCH information included in the downlink control information DCI according to the third scheme above, after the terminal device receives the DCI sent by the base station, it can determine the changes of the MCCH#1 information and the MCCH#2 information, and the reasons for the changes of the MCCH#1 information and the MCCH#2 information, respectively, according to the highest or lowest 4 bits of information in the first bit set corresponding to the DCI, that is, every 2 bits indicate a change of MCCH information and the reason for the change of the MCCH information. Therefore, for the 2-bit setting corresponding to each MCCH information, there are specifically the following six results, which can be referred to Case 3 in the above step S504, and will not be described in detail here.

[0263] S705: The terminal device receives the physical downlink data channel carrying MCCH#1 and / or MCCH#2, or stops receiving the physical downlink data channel carrying MCCH#1 and / or MCCH#2, according to the change notification information of MCCH#1 information and MCCH#2 information.

[0264] Specifically, the terminal device receives the physical downlink data channel carrying MCCH#1, or stops receiving the physical downlink data channel carrying MCCH#1, according to the change notification information of MCCH#1 information. The terminal device receives the physical downlink data channel carrying MCCH#2, or stops receiving the physical downlink data channel carrying MCCH#2, according to the change notification information of MCCH#2 information.

[0265] Exemplarily, when executing step S705, when the terminal device determines that the change notification information of the MCCH#1 information is caused by the arrival or modification or change of a session or service, the terminal device receives a PDSCH carrying new MCCH#1 information;

[0266] When the terminal device determines that the change notification information of the MCCH#1 information is caused by the termination of the session or service, the terminal device stops receiving the PDSCH carrying the MCCH#1 information.

[0267] The above steps S701-S705 can refer to Figure 8 A simplified diagram of the process is shown.

[0268] In summary, in this implementation, the base station can reuse the bit information of the existing field in the DCI that schedules the MCCH to indicate the MCCH information change to the terminal device, thereby eliminating the need to introduce a new DCI format and increase the detection complexity of the terminal device, and the scheme keeps the size of the original DCI unchanged, which can reduce the operation of aligning the additional DCI size. In addition, the scheme only uses the DCI that schedules the MCCH to notify the terminal device of the MCCH information change, so the terminal device can quickly receive the changed MCCH information. In addition, compared with the first embodiment, in the second embodiment, the information of multiple MCCH information changes can be notified in the DCI that schedules one MCCH, thereby improving the efficiency of the base station notifying the terminal device of the MCCH information and reducing the additional power consumption of the system.

[0269] Based on the same technical concept, the embodiment of the present application provides a communication device for determining control channel change information, which has the behavior function of the terminal device in the above method embodiment. The communication device may include a module or unit corresponding to the method / operation / step / action described in the above method embodiment, and the module or unit may be a hardware circuit, or software, or a combination of a hardware circuit and software. The device may have the following features: Fig. 9 The structure shown.

[0270] like Fig. 9 As shown, the device 900 may include a communication unit 901 and a processing unit 902. Each unit is described in detail below.

[0271] The communication unit 901 is used to obtain system information from a network device, where the system information includes configuration information for receiving a first control channel;

[0272] The communication unit 901 is further configured to receive downlink control information according to the system information, where the downlink control information includes a first bit set and a second bit set, where values ​​corresponding to all bits in the second bit set are 0 or 1, and the first control channel is associated with a first wireless network temporary identifier;

[0273] The processing unit 902 is used to determine, when a first condition is met, based on the first bit set, that information change occurs on at least one of the N control channels, where the N control channels include the first control channel, and N is a positive integer greater than or equal to 1; wherein the first condition includes that the downlink control information is scrambled by a first wireless network temporary identifier.

[0274] In a possible implementation manner, the downlink control information is carried in a physical downlink control channel, and a cyclic redundancy check of the physical downlink control channel is scrambled by the first radio network temporary identifier.

[0275] In a possible implementation manner, when the second condition is met, the bits in the first bit set and / or the second bit set are used to indicate at least one of the following fields:

[0276] Downlink control information format identifier, and / or modulation and coding scheme, and / or new data indication, and / or redundancy version, and / or hybrid automatic repeat request process number, and / or downlink allocation indication, and / or transmission power control command for scheduling physical uplink control channel, and / or physical uplink control channel resource indication, and / or physical downlink shared channel to hybrid automatic repeat request feedback timing indication; wherein the second condition includes that the downlink control information is scrambled by a cell wireless network temporary identifier.

[0277] In a possible implementation manner, the first bit set includes N bits, and one bit of information corresponds to indicating one control channel information change, and the value of the one bit of information is 1 to indicate the corresponding control channel information change, including one of the following:

[0278] The value of N is 1, and the first bit set corresponds to 1 bit of the downlink control information format identification field, or 1 bit of the new data indication field;

[0279] The value of N is 2, and the first bit set corresponds to 2 bits of the redundant version field, or 2 bits of the downlink allocation indication field, or 2 bits of the transmission power control command field for scheduling the physical uplink control channel;

[0280] The value of N is 3, and the first bit set corresponds to 3 bits of the physical uplink control channel resource indication field, or 3 bits of the physical downlink shared channel to hybrid automatic repeat request feedback timing indication field, or 1 bit of the new data indication field plus 2 bits of the redundant version field;

[0281] The value of N is 4, and the first bit set corresponds to 4 bits of the hybrid automatic repeat request process number field, or 2 bits of the downlink allocation indication field plus 2 bits of the transmission power control command field for scheduling the physical uplink control channel.

[0282] In a possible implementation manner, the first bit set includes 2*N bit numbers, including one of the following:

[0283] The value of N is 1, and the first bit set corresponds to 2 bits of the redundant version field, or 2 bits of the downlink allocation indication field, or 2 bits of the transmission power control command field for scheduling the physical uplink control channel;

[0284] The value of N is 2, and the first bit set corresponds to 4 bits of the hybrid automatic repeat request process number field, or 2 bits of the downlink allocation indication field plus 2 bits of the transmission power control command field for scheduling the physical uplink control channel;

[0285] The value of N is 3, and the first bit set corresponds to 2 bits of the redundant version field plus 4 bits of the hybrid automatic repeat request process number field, or 4 bits of the hybrid automatic repeat request process number field plus 2 bits of the downlink allocation indication field, or 3 bits of the physical uplink control channel resource indication field plus 3 bits of the physical downlink shared channel to hybrid automatic repeat request feedback timing indication field;

[0286] The value of N is 4, and the first bit set corresponds to 2 bits of the redundant version field plus 4 bits of the hybrid automatic repeat request process number field plus 2 bits of the downlink allocation indication field; or 4 bits of the hybrid automatic repeat request process number field plus 2 bits of the downlink allocation indication field plus 2 bits of the transmission power control command field for scheduling the physical uplink control channel, or 2 bits of the transmission power control command field for scheduling the physical uplink control channel plus 3 bits of the physical uplink control channel resource indication field plus 3 bits of the physical downlink shared channel to the hybrid automatic repeat request feedback timing indication field.

[0287] In a possible implementation, the first bit set includes 2*N bits, and the 2 bits of information correspond to indicating a change in information of a control channel, the 2 bits are arranged in sequence from high to low or from low to high in the first bit set, or the first N bits correspond to N control channels respectively, and the last N bits correspond to N control channels respectively, and each 1 bit in the first N bits and the last N bits constitutes the 2 bits, including one of the following:

[0288] The value corresponding to the lower bit of the two bits is 1, indicating that the control channel information of the control channel corresponding to the two bits is changed due to the arrival of a session or service, and the value corresponding to the higher bit of the two bits is 1, indicating that the control channel information of the control channel corresponding to the two bits is changed due to modification, change or stop of the session or service; or the value corresponding to the lower bit of the two bits is 1, indicating that the control channel information of the control channel corresponding to the two bits is changed due to modification, change or stop of the session or service, and the value corresponding to the higher bit of the two bits is 1, indicating that the control channel information of the control channel corresponding to the two bits is changed due to the arrival of a session or service; or,

[0289] The values ​​corresponding to the two bits are 00, 01, 10 and 11, which respectively represent six random combinations of four states: the corresponding control channel information has not changed, the control channel information has changed due to the arrival of a session or service, the control channel information has changed due to the cessation of a session or service, and the control channel information has changed due to modification or change of a session or service.

[0290] In a possible implementation manner, the second bit set includes at least one of the following fields:

[0291] Modulation and coding scheme field, and / or new data indication field, and / or redundant version field, and / or hybrid automatic repeat request process number field, and / or downlink allocation indication field, and / or transmission power control command field for scheduling physical uplink control channel, and / or physical uplink control channel resource indication field, and / or physical downlink shared channel to hybrid automatic repeat request feedback timing indication.

[0292] In a possible implementation, the configuration information includes at least one of the following: a partial bandwidth of the first control channel, a control resource set of the first control channel, a search space of the first control channel, a wireless network temporary identifier of the first control channel, and a downlink shared physical channel for carrying the first control channel.

[0293] Based on the same technical concept, the embodiment of the present application provides a communication device for determining control channel change information, which has the behavior function of the network device in the above method embodiment. The communication device may include a module or unit corresponding to the method / operation / step / action described in the above method embodiment, and the module or unit may be a hardware circuit, or software, or a combination of a hardware circuit and software. The device may also refer to Fig. 9 The structure shown.

[0294] like Fig. 9As shown, the device 900 may include a communication unit 901 and a processing unit 902. Each unit is described in detail below.

[0295] The communication unit 901 is used to obtain configuration information of the first control channel;

[0296] Also used for: sending system information to an endpoint device, wherein the system information includes configuration information of the first control channel;

[0297] The processing unit 902 is configured to determine that information of at least one control channel among N control channels has been changed, wherein the N downlink control channels include the first control channel, and the first control channel is associated with a first wireless network temporary identifier; N is a positive integer greater than or equal to 1;

[0298] The communication unit 901 is also used to send downlink control information, the downlink control information includes a first bit set and a second bit set, the values ​​corresponding to all bits in the second bit set are 0 or 1, the first bit set is associated with the N control channels, and the first bit set indicates that information change occurs in at least one of the control channels, wherein the downlink control information is scrambled by a first wireless network temporary identifier, and N is a positive integer greater than or equal to 1; the downlink control information is sent to the terminal device.

[0299] In a possible implementation manner, the downlink control information is carried in a physical downlink control channel, and a cyclic redundancy check of the physical downlink control channel is scrambled by the first radio network temporary identifier.

[0300] In a possible implementation manner, the downlink control information is scrambled by a cell radio network temporary identifier, and bits in the first bit set and / or the second bit set are used to indicate at least one of the following fields:

[0301] Downlink control information format identifier, and / or modulation and coding scheme, and / or new data indication, and / or redundancy version, and / or hybrid automatic repeat request process number, and / or downlink allocation indication, and / or transmission power control command for scheduling physical uplink control channel, and / or physical uplink control channel resource indication, and / or physical downlink shared channel to hybrid automatic repeat request feedback timing indication.

[0302] In a possible implementation manner, the first bit set includes N bits, and one bit of information corresponds to indicating one control channel information change, and the value of the one bit of information is 1 to indicate the corresponding control channel information change, including one of the following:

[0303] The value of N is 1, and the first bit set corresponds to 1 bit of the downlink control information format identification field, or 1 bit of the new data indication field;

[0304] The value of N is 2, and the first bit set corresponds to 2 bits of the redundant version field, or 2 bits of the downlink allocation indication field, or 2 bits of the transmission power control command field for scheduling the physical uplink control channel;

[0305] The value of N is 3, and the first bit set corresponds to 3 bits of the physical uplink control channel resource indication field, or 3 bits of the physical downlink shared channel to hybrid automatic repeat request feedback timing indication field, or 1 bit of the new data indication field plus 2 bits of the redundant version field;

[0306] The value of N is 4, and the first bit set corresponds to 4 bits of the hybrid automatic repeat request process number field, or 2 bits of the downlink allocation indication field plus 2 bits of the transmission power control command field for scheduling the physical uplink control channel.

[0307] In a possible implementation manner, the first bit set includes 2*N bit numbers, including one of the following:

[0308] The value of N is 1, and the first bit set corresponds to 2 bits of the redundant version field, or 2 bits of the downlink allocation indication field, or 2 bits of the transmission power control command field for scheduling the physical uplink control channel;

[0309] The value of N is 2, and the first bit set corresponds to 4 bits of the hybrid automatic repeat request process number field, or 2 bits of the downlink allocation indication field plus 2 bits of the transmission power control command field for scheduling the physical uplink control channel;

[0310] The value of N is 3, and the first bit set corresponds to 2 bits of the redundant version field plus 4 bits of the hybrid automatic repeat request process number field, or 4 bits of the hybrid automatic repeat request process number field plus 2 bits of the downlink allocation indication field, or 3 bits of the physical uplink control channel resource indication field plus 3 bits of the physical downlink shared channel to hybrid automatic repeat request feedback timing indication field;

[0311] The value of N is 4, and the first bit set corresponds to 2 bits of the redundant version field plus 4 bits of the hybrid automatic repeat request process number field plus 2 bits of the downlink allocation indication field; or 4 bits of the hybrid automatic repeat request process number field plus 2 bits of the downlink allocation indication field plus 2 bits of the transmission power control command field for scheduling the physical uplink control channel, or 2 bits of the transmission power control command field for scheduling the physical uplink control channel plus 3 bits of the physical uplink control channel resource indication field plus 3 bits of the physical downlink shared channel to the hybrid automatic repeat request feedback timing indication field.

[0312] In a possible implementation, the first bit set includes 2*N bits, and the 2 bits of information correspond to indicating a change in information of a control channel, the 2 bits are arranged in sequence from high to low or from low to high in the first bit set, or the first N bits correspond to N control channels respectively, and the last N bits correspond to N control channels respectively, and each 1 bit in the first N bits and the last N bits constitutes the 2 bits, including one of the following:

[0313] The value corresponding to the lower bit of the two bits is 1, indicating that the control channel information of the control channel corresponding to the two bits is changed due to the arrival of a session or service, and the value corresponding to the higher bit of the two bits is 1, indicating that the control channel information of the control channel corresponding to the two bits is changed due to modification, change or stop of the session or service; or the value corresponding to the lower bit of the two bits is 1, indicating that the control channel information of the control channel corresponding to the two bits is changed due to modification, change or stop of the session or service, and the value corresponding to the higher bit of the two bits is 1, indicating that the control channel information of the control channel corresponding to the two bits is changed due to the arrival of a session or service; or,

[0314] The values ​​corresponding to the two bits are 00, 01, 10 and 11, which respectively represent six random combinations of four states: the corresponding control channel information has not changed, the control channel information has changed due to the arrival of a session or service, the control channel information has changed due to the cessation of a session or service, and the control channel information has changed due to modification or change of a session or service.

[0315] In a possible implementation manner, the second bit set includes at least one of the following fields:

[0316] Modulation and coding scheme field, and / or new data indication field, and / or redundant version field, and / or hybrid automatic repeat request process number field, and / or downlink allocation indication field, and / or transmission power control command field for scheduling physical uplink control channel, and / or physical uplink control channel resource indication field, and / or physical downlink shared channel to hybrid automatic repeat request feedback timing indication.

[0317] In a possible implementation, the configuration information includes at least one of the following: a partial bandwidth of the first control channel, a control resource set of the first control channel, a search space of the first control channel, a wireless network temporary identifier of the first control channel, and a downlink shared physical channel for carrying the first control channel.

[0318] In addition, the embodiment of the present application also provides a communication device used in the present application, which may have the following Fig.10In the structure shown, the communication device may be a terminal device, or a chip or chip system capable of supporting the terminal device to implement the above method. Fig.10 The communication device 1000 shown may include at least one processor 1002, and the at least one processor 1002 is used to couple with the memory 1003, read and execute the instructions in the memory to implement the steps involved in the base station in the method provided in the embodiment of the present application. Optionally, the device 1000 may also include a transceiver 1001, and the transceiver 1001 may be used to support the device 1000 to receive or send signaling or data. The transceiver 1002 in the device 1100 can be used to implement the functions of the above-mentioned communication unit 901. For example, the transceiver 1001 can be used for the device 1000 to perform the following steps: Figure 4 In the steps S401 and S402 of the data transmission method shown in FIG. 1 , the processor 1002 may be used to implement the functions of the processing unit 902. For example, the transceiver 1001 may be used in the device 1000 to perform the following steps: Figure 4 The step S403 in the method for data transmission shown. In addition, the transceiver 1001 can be coupled to an antenna to support the device 1100 to communicate. Optionally, the device 1000 may also include a memory 1003, in which a computer program and instructions are stored. The memory 1003 may be coupled to the processor 1002 and / or the transceiver 1001 to support the processor 1002 to call the computer program and instructions in the memory 1003 to implement the steps involved in the base station in the method provided in the embodiment of the present application; in addition, the memory 1003 can also be used to store data involved in the embodiment of the method of the present application, for example, to store data and information necessary to support the transceiver 1002 to implement interaction.

[0319] In addition, the embodiment of the present application also provides a communication device used in the present application, and the communication device can also refer to Fig.10 In the structure shown in the figure, the communication device may be a base station, or a chip or chip system capable of supporting the base station to implement the above method. Fig.10 The communication device 1000 shown may include at least one processor 1002, and the at least one processor 1002 is used to couple with the memory 1003, read and execute the instructions in the memory to implement the steps involved in the base station in the method provided in the embodiment of the present application. Optionally, the device 1000 may also include a transceiver 1001, and the transceiver 1001 may be used to support the device 1000 to receive or send signaling or data. The transceiver 1002 in the device 1100 can be used to implement the functions of the above-mentioned communication unit 901. For example, the transceiver 1001 can be used for the device 1000 to perform the following steps: Figure 4In the steps S401 and S402 of the data transmission method shown in FIG. 1 , the processor 1002 may be used to implement the functions of the processing unit 902. For example, the processor 1003 may be used to execute the steps S401 and S402 of the data transmission method shown in FIG. Figure 4 The step S403 in the method for data transmission shown in the figure. In addition, the transceiver 1001 can be coupled to the antenna to support the device 1000 to communicate. Optionally, the device 1000 may also include a memory 1003, in which computer programs and instructions are stored. The memory 1003 may be coupled to the processor 1002 and / or the transceiver 1001 to support the processor 1002 to call the computer program and instructions in the memory 1003 to implement the steps involved in the base station in the method provided in the embodiment of the present application; in addition, the memory 1003 can also be used to store data involved in the embodiment of the method of the present application, for example, to store data and information necessary to support the transceiver 1002 to implement interaction.

[0320] The division of modules in the embodiments of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation. In addition, each functional module in each embodiment of the present application may be integrated into a processor, or may exist physically separately, or two or more modules may be integrated into one module. The above-mentioned integrated modules may be implemented in the form of hardware or in the form of software functional modules.

[0321] An embodiment of the present application provides a computer-readable storage medium storing a computer program, wherein the computer program includes instructions for executing the above method embodiment.

[0322] An embodiment of the present application provides a computer program product including instructions, which, when executed on a computer, enables the computer to execute the above method embodiment.

[0323] Through the description of the above implementation mode, it can be clearly understood by those skilled in the art that the embodiments of the present application can be implemented by hardware, firmware, or a combination thereof. When software is used for implementation, the above functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein the communication media include any medium that facilitates the transmission of a computer program from one place to another. The storage medium can be any available medium that a computer can access. Taking this as an example but not limited to: a computer-readable medium can include RAM, ROM, electrically erasable programmable read only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disc storage, disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store a desired program code in the form of an instruction or data structure and can be accessed by a computer. In addition. Any connection can be appropriately a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, wireless, and microwave are included in the fixation of the medium. As used in the embodiments of the present application, disk and disc include compact disc (CD), laser disc, optical disc, digital video disc (DVD), floppy disk, and Blu-ray disc, where disks usually copy data magnetically and discs use lasers to copy data optically. The above combinations should also be included in the scope of protection of computer-readable media.

[0324] In short, the above description is only an embodiment of the present application and is not intended to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made according to the disclosure of the present application shall be included in the protection scope of the present application.

Claims

1. A method for determining control channel change information, characterized in that: include: Acquire system information from a network device, where the system information includes configuration information for receiving a first control channel; receiving downlink control information according to the system information, the downlink control information including a first bit set and a second bit set, values ​​corresponding to all bits in the second bit set are 0 or 1, and the first control channel is associated with a first wireless network temporary identifier; When the first condition is met, according to the first bit set, it is determined that information change occurs in at least one of N control channels, the N control channels include the first control channel, and N is a positive integer greater than or equal to 1; wherein the first condition includes that the downlink control information is encrypted by the first wireless network temporary identifier.

2. The method according to claim 1, characterized in that The downlink control information is carried in a physical downlink control channel, and a cyclic redundancy check of the physical downlink control channel is scrambled by the first radio network temporary identifier.

3. The method according to claim 1, characterized in that When the second condition is met, the bits in the first bit set and / or the second bit set are used to indicate at least one of the following fields: Downlink control information format identifier, and / or modulation and coding scheme, and / or new data indication, and / or redundancy version, and / or hybrid automatic repeat request process number, and / or downlink allocation indication, and / or transmission power control command for scheduling physical uplink control channel, and / or physical uplink control channel resource indication, and / or physical downlink shared channel to hybrid automatic repeat request feedback timing indication; wherein the second condition includes that the downlink control information is scrambled by a cell wireless network temporary identifier.

4. The method according to claim 1 or 2, characterized in that: The first bit set includes N bits, and one bit of information corresponds to indicating one control channel information change, and the value of the one bit of information is 1 to indicate the corresponding control channel information change, including one of the following: The value of N is 1, and the first bit set corresponds to 1 bit of the downlink control information format identification field, or 1 bit of the new data indication field; The value of N is 2, and the first bit set corresponds to 2 bits of the redundant version field, or 2 bits of the downlink allocation indication field, or 2 bits of the transmission power control command field for scheduling the physical uplink control channel; The value of N is 3, and the first bit set corresponds to 3 bits of the physical uplink control channel resource indication field, or 3 bits of the physical downlink shared channel to hybrid automatic repeat request feedback timing indication field, or 1 bit of the new data indication field plus 2 bits of the redundant version field; The value of N is 4, and the first bit set corresponds to 4 bits of the hybrid automatic repeat request process number field, or 2 bits of the downlink allocation indication field plus 2 bits of the transmission power control command field for scheduling the physical uplink control channel.

5. The method according to claim 1 or 2, characterized in that: The first bit set includes 2*N bit numbers, including one of the following: The value of N is 1, and the first bit set corresponds to 2 bits of the redundant version field, or 2 bits of the downlink allocation indication field, or 2 bits of the transmission power control command field for scheduling the physical uplink control channel; The value of N is 2, and the first bit set corresponds to 4 bits of the hybrid automatic repeat request process number field, or 2 bits of the downlink allocation indication field plus 2 bits of the transmission power control command field for scheduling the physical uplink control channel; The value of N is 3, and the first bit set corresponds to 2 bits of the redundant version field plus 4 bits of the hybrid automatic repeat request process number field, or 4 bits of the hybrid automatic repeat request process number field plus 2 bits of the downlink allocation indication field, or 3 bits of the physical uplink control channel resource indication field plus 3 bits of the physical downlink shared channel to hybrid automatic repeat request feedback timing indication field; The value of N is 4, and the first bit set corresponds to 2 bits of the redundant version field plus 4 bits of the hybrid automatic repeat request process number field plus 2 bits of the downlink allocation indication field; or 4 bits of the hybrid automatic repeat request process number field plus 2 bits of the downlink allocation indication field plus 2 bits of the transmission power control command field for scheduling the physical uplink control channel, or 2 bits of the transmission power control command field for scheduling the physical uplink control channel plus 3 bits of the physical uplink control channel resource indication field plus 3 bits of the physical downlink shared channel to the hybrid automatic repeat request feedback timing indication field.

6. The method according to claim 5, characterized in that The first bit set includes 2*N bits, and the 2 bits of information correspond to indicating a change in information of a control channel, the 2 bits are arranged in sequence from high to low or from low to high in the first bit set, or the first N bits correspond to N control channels respectively, and the last N bits correspond to N control channels respectively, and each 1 bit in the first N bits and the last N bits constitutes the 2 bits, including one of the following: The value corresponding to the lower bit of the two bits is 1, indicating that the control channel information of the control channel corresponding to the two bits is changed due to the arrival of a session or service, and the value corresponding to the higher bit of the two bits is 1, indicating that the control channel information of the control channel corresponding to the two bits is changed due to modification, change or stop of the session or service; or the value corresponding to the lower bit of the two bits is 1, indicating that the control channel information of the control channel corresponding to the two bits is changed due to modification, change or stop of the session or service, and the value corresponding to the higher bit of the two bits is 1, indicating that the control channel information of the control channel corresponding to the two bits is changed due to the arrival of a session or service; or, The values ​​corresponding to the two bits are 00, 01, 10 and 11, which respectively represent six random combinations of four states: the corresponding control channel information has not changed, the control channel information has changed due to the arrival of a session or service, the control channel information has changed due to the stop of a session or service, and the control channel information has changed due to modification or change of a session or service.

7. The method according to claim 1 or 2, characterized in that: The second bit set includes at least one of the following fields: Modulation and coding scheme field, and / or new data indication field, and / or redundant version field, and / or hybrid automatic repeat request process number field, and / or downlink allocation indication field, and / or transmission power control command field for scheduling physical uplink control channel, and / or physical uplink control channel resource indication field, and / or physical downlink shared channel to hybrid automatic repeat request feedback timing indication.

8. The method according to claim 1, characterized in that The configuration information includes at least one of the following: a partial bandwidth of the first control channel, a control resource set of the first control channel, a search space of the first control channel, a wireless network temporary identifier of the first control channel, and a downlink shared physical channel for carrying the first control channel.

9. A method for determining control channel change information, characterized in that: include: Acquire configuration information of a first control channel; Sending system information to a terminal device, where the system information includes configuration information of the first control channel; Determine that information change occurs on at least one control channel among N control channels, where the N control channels include the first control channel, and the first control channel is associated with a first wireless network temporary identifier; N is a positive integer greater than or equal to 1; A network device sends downlink control information, wherein the downlink control information includes a first bit set and a second bit set, wherein the values ​​corresponding to all bits in the second bit set are 0 or 1, wherein the first bit set is associated with the N control channels, and wherein the first bit set indicates that information change occurs in at least one of the control channels, wherein the downlink control information is scrambled by a first wireless network temporary identifier.

10. The method according to claim 9, characterized in that The downlink control information is carried in a physical downlink control channel, and a cyclic redundancy check of the physical downlink control channel is scrambled by the first radio network temporary identifier.

11. The method according to claim 9, characterized in that The downlink control information is scrambled by a cell radio network temporary identifier, and bits in the first bit set and / or the second bit set are used to indicate at least one of the following fields: Downlink control information format identifier, and / or modulation and coding scheme, and / or new data indication, and / or redundancy version, and / or hybrid automatic repeat request process number, and / or downlink allocation indication, and / or transmission power control command for scheduling physical uplink control channel, and / or physical uplink control channel resource indication, and / or physical downlink shared channel to hybrid automatic repeat request feedback timing indication.

12. The method according to claim 9 or 10, characterized in that: The first bit set includes N bits, and one bit of information corresponds to indicating one control channel information change, and the value of the one bit of information is 1 to indicate the corresponding control channel information change, including one of the following: The value of N is 1, and the first bit set corresponds to 1 bit of the downlink control information format identification field, or 1 bit of the new data indication field; The value of N is 2, and the first bit set corresponds to 2 bits of the redundant version field, or 2 bits of the downlink allocation indication field, or 2 bits of the transmission power control command field for scheduling the physical uplink control channel; The value of N is 3, and the first bit set corresponds to 3 bits of the physical uplink control channel resource indication field, or 3 bits of the physical downlink shared channel to hybrid automatic repeat request feedback timing indication field, or 1 bit of the new data indication field plus 2 bits of the redundant version field; The value of N is 4, and the first bit set corresponds to 4 bits of the hybrid automatic repeat request process number field, or 2 bits of the downlink allocation indication field plus 2 bits of the transmission power control command field for scheduling the physical uplink control channel.

13. The method according to claim 9 or 10, characterized in that: The first bit set includes 2*N bit numbers, including one of the following: The value of N is 1, and the first bit set corresponds to 2 bits of the redundant version field, or 2 bits of the downlink allocation indication field, or 2 bits of the transmission power control command field for scheduling the physical uplink control channel; The value of N is 2, and the first bit set corresponds to 4 bits of the hybrid automatic repeat request process number field, or 2 bits of the downlink allocation indication field plus 2 bits of the transmission power control command field for scheduling the physical uplink control channel; The value of N is 3, and the first bit set corresponds to 2 bits of the redundant version field plus 4 bits of the hybrid automatic repeat request process number field, or 4 bits of the hybrid automatic repeat request process number field plus 2 bits of the downlink allocation indication field, or 3 bits of the physical uplink control channel resource indication field plus 3 bits of the physical downlink shared channel to hybrid automatic repeat request feedback timing indication field; The value of N is 4, and the first bit set corresponds to 2 bits of the redundant version field plus 4 bits of the hybrid automatic repeat request process number field plus 2 bits of the downlink allocation indication field; or 4 bits of the hybrid automatic repeat request process number field plus 2 bits of the downlink allocation indication field plus 2 bits of the transmission power control command field for scheduling the physical uplink control channel, or 2 bits of the transmission power control command field for scheduling the physical uplink control channel plus 3 bits of the physical uplink control channel resource indication field plus 3 bits of the physical downlink shared channel to the hybrid automatic repeat request feedback timing indication field.

14. The method according to claim 13, characterized in that The first bit set includes 2*N bits, and the 2 bits of information correspond to indicating a change in information of a control channel, the 2 bits are arranged in sequence from high to low or from low to high in the first bit set, or the first N bits correspond to N control channels respectively, and the last N bits correspond to N control channels respectively, and each 1 bit in the first N bits and the last N bits constitutes the 2 bits, including one of the following: The value corresponding to the lower bit of the two bits is 1, indicating that the control channel information of the control channel corresponding to the two bits is changed due to the arrival of a session or service, and the value corresponding to the higher bit of the two bits is 1, indicating that the control channel information of the control channel corresponding to the two bits is changed due to modification, change or stop of the session or service; or the value corresponding to the lower bit of the two bits is 1, indicating that the control channel information of the control channel corresponding to the two bits is changed due to modification, change or stop of the session or service, and the value corresponding to the higher bit of the two bits is 1, indicating that the control channel information of the control channel corresponding to the two bits is changed due to the arrival of a session or service; or, The values ​​corresponding to the two bits are 00, 01, 10 and 11, which respectively represent six random combinations of four states: the corresponding control channel information has not changed, the control channel information has changed due to the arrival of a session or service, the control channel information has changed due to the stop of a session or service, and the control channel information has changed due to modification or change of a session or service.

15. The method according to claim 9 or 10, characterized in that The second bit set includes at least one of the following fields: Modulation and coding scheme field, and / or new data indication field, and / or redundant version field, and / or hybrid automatic repeat request process number field, and / or downlink allocation indication field, and / or transmission power control command field for scheduling physical uplink control channel, and / or physical uplink control channel resource indication field, and / or physical downlink shared channel to hybrid automatic repeat request feedback timing indication.

16. The method according to claim 9, characterized in that The configuration information includes at least one of the following: a partial bandwidth of the first control channel, a control resource set of the first control channel, a search space of the first control channel, a wireless network temporary identifier of the first control channel, and a downlink shared physical channel for carrying the first control channel.

17. A terminal device, characterized in that: include: A communication unit and a processing unit; the communication unit is used for communication; The processing unit is used to execute the method as claimed in any one of claims 1 to 8.

18. A network device, characterized in that: include: A communication unit and a processing unit; the communication unit is used for communication; The processing unit is used to execute the method as claimed in any one of claims 9 to 16.

19. A terminal device, characterized in that: include: transceivers and processors; The transceiver is used for communication; The processor is used to execute the method according to any one of claims 1 to 8.

20. A network device, characterized in that: include: transceivers and processors; The transceiver is used for communication; and the processor is used for executing the method as claimed in any one of claims 9 to 16.

21. A communication system, characterized in that: include: Terminal equipment and network equipment; the terminal equipment is used to implement the method as described in any one of claims 1-8, and the network equipment is used to implement the method as described in any one of claims 9-16.

22. A non-volatile computer-readable storage medium, characterized in that: A computer program is stored, and the computer program is loaded by a processor to execute the method according to any one of claims 1 to 16.

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