CN115884327A

CN115884327A - Communication method and device

Info

Publication number: CN115884327A
Application number: CN202111144243.9A
Authority: CN
Inventors: 张战战; 铁晓磊; 周涵; 黄雯雯; 花梦
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-09-28
Filing date: 2021-09-28
Publication date: 2023-03-31
Also published as: WO2023051442A1

Abstract

The embodiment of the application provides a communication method and device. The method comprises the following steps: the first terminal receives first configuration information from the network equipment; wherein the first configuration information is used to configure a paging search space set within the first bandwidth portion BWP and the second BWP; when the first BWP is the active BWP, the first terminal receives first Downlink Control Information (DCI) in a paging search space set configured in the first BWP, wherein the first DCI comprises short message type information and is not used for scheduling a paging Physical Downlink Shared Channel (PDSCH); and when the second BWP is the active BWP, the first terminal receives a second DCI in a paging search space set configured in the second BWP, wherein the second DCI comprises short message type information and can schedule a paging PDSCH. By adopting the scheme of the application, the power consumption and the access time delay of the first terminal can be reduced.

Description

Communication method and device

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a communication method and apparatus.

Background

Currently, it is being considered to configure a dedicated downlink bandwidth part (BWP) for a reduced capability (redcap) terminal. On this basis, a random access search space set can be configured for the redcap terminal at the downlink BWP dedicated to the redcap. However, when performing random access, the redcap terminal needs to perform radio frequency handover to acquire short message type information such as system message change, which increases power consumption of the redcap terminal. If the redcap terminal does not execute the radio frequency switching, the redcap terminal does not acquire the short message information in time, and may initiate random access for many times and fail for many times, resulting in increase of power consumption and access delay of the redcap terminal. Therefore, how to reduce the power consumption and access delay of the redcap terminal is an urgent problem to be solved.

Disclosure of Invention

The embodiment of the application provides a communication method and device.

In a first aspect, a communication method is provided, including:

the first terminal receives first configuration information from the network device. Wherein the first configuration information is used to configure the paging search space set within the first bandwidth portion BWP and the second BWP. When the first BWP is active BWP, the first terminal receives first downlink control information DCI in a paging search space set configured in the first BWP, where the first DCI includes short message type information, and the first DCI is not used to schedule a paging physical downlink shared channel PDSCH. And when the second BWP is the active BWP, the first terminal receives second DCI in a paging search space set configured in the second BWP, wherein the second DCI comprises short message class information, and the second DCI can schedule a paging PDSCH.

According to the scheme of the application, in the process of performing RA in the first BWP, the first terminal may monitor a paging PDCCH in a paging search space set configured in the first BWP in order to acquire short message class information. The first terminal does not need to perform RF handover, that is, the first terminal does not need to handover to the second BWP, and monitors the paging PDCCH in the paging search space set configured in the second BWP to obtain the short message type information. Therefore, by adopting the scheme of the application, the power consumption of the first terminal can be effectively reduced, and the access time delay of the first terminal is reduced.

With reference to the first aspect, in some implementations of the first aspect, the first DCI not used for scheduling a paging PDSCH includes:

the first DCI includes a short message indication field indicating that the first DCI does not include scheduling information of the PDSCH. Or, the first DCI includes a first bit field, where the first bit field is a bit field other than the short message indication field and the short message field, and the first bit field is set to a first preset value or is reserved.

With reference to the first aspect, in certain implementations of the first aspect, a configuration of the first BWP intra-page search space set is the same as a configuration of the second BWP intra-page search space set. Wherein the configuration of the paging search space set comprises at least one of:

monitoring period, period offset, the number of continuous time slots of each monitoring occasion, monitoring symbols in the monitoring occasions, PDCCH aggregation level of a candidate physical downlink control channel, the number of PDCCH candidates corresponding to the PDCCH aggregation level of the candidate, search space set type and DCI format related to search space.

With reference to the first aspect, in certain implementations of the first aspect, the first configuration information is further used to configure a random access, RA, search space set within the first BWP, the RA search space set being used for the first terminal to perform RA within the first BWP.

The first DCI is received by the first terminal during RA execution within the first BWP.

With reference to the first aspect, in certain implementations of the first aspect, the first configuration information is further used to configure the paging occasions PO in the first BWP and the second BWP, and the configuration of the POs in the first BWP is the same as the configuration of the PO in the second BWP. Wherein the configuration of the PO includes at least one of:

the method comprises the steps of a default paging cycle, the proportion of paging frames in a wireless frame, paging frame offset, the number of paging occasions included by each paging frame, and the time domain position of the first PDCCH monitoring occasion of each PO included by the paging frame in the paging frame.

With reference to the first aspect, in certain implementations of the first aspect, the first configuration information is further used to configure paging occasions PO in the first BWP and the second BWP, where a partial configuration of the POs in the first BWP is the same as a partial configuration of the POs in the second BWP, and the partial configuration includes a ratio of paging frames in a radio frame and a paging frame offset. The number of paging occasions in the first BWP intra-paging frame is less than the number of paging occasions in the second BWP intra-paging frame.

In a second aspect, a communication method is provided, including:

the network device sends the first configuration information to the first terminal. Wherein the first configuration information is used to configure the paging search space set within the first bandwidth portion BWP and the second BWP. The network device sends first Downlink Control Information (DCI) to a first terminal in a paging search space set configured in a first BWP, wherein the first DCI comprises short message class information, and the first DCI is not used for scheduling a paging Physical Downlink Shared Channel (PDSCH). And the network equipment transmits a second DCI in the paging search space set configured in the second BWP, wherein the second DCI comprises short message class information and can schedule a paging PDSCH.

According to the scheme of the application, the network device configures a paging search space set for the first terminal in both the first BWP and the second BWP. In order to acquire the short message class information, the first terminal may monitor a paging PDCCH in a paging search space set configured in the first BWP, during the first BWP performing RA. The first terminal does not need to perform RF handover, that is, the first terminal does not need to handover to the second BWP, and monitors the paging PDCCH in the paging search space set configured in the second BWP to obtain the short message type information. Therefore, by adopting the scheme of the application, the power consumption of the first terminal can be effectively reduced, and the access time delay of the first terminal is reduced.

With reference to the second aspect, in some implementations of the second aspect, the first DCI is not for scheduling a paging PDSCH includes:

With reference to the second aspect, in certain implementations of the second aspect, a configuration of the first BWP intra-page search space set is the same as a configuration of the second BWP intra-page search space set.

Wherein the configuration of the paging search space set comprises at least one of:

With reference to the second aspect, in certain implementations of the second aspect, the first configuration information is further used to configure a random access, RA, search space set within the first BWP, the RA search space set being used for the first terminal to perform random access within the first BWP.

With reference to the second aspect, in certain implementations of the second aspect, the first configuration information is further used to configure the paging occasion PO in the first BWP and the second BWP, and the configuration of the PO in the first BWP is the same as the configuration of the PO in the second BWP. Wherein the configuration of the PO includes at least one of:

With reference to the second aspect, in some implementations of the second aspect, the first configuration information is further used to configure a paging occasion PO in the first BWP and the second BWP, where a partial configuration of the PO in the first BWP is the same as a partial configuration of the PO in the second BWP, and the partial configuration includes a ratio of a paging frame in a radio frame and a paging frame offset. The number of paging occasions in the first BWP intra-paging frame is less than the number of paging occasions in the second BWP intra-paging frame.

In a third aspect, a communication method is provided, including:

the first terminal receives first configuration information from the network device. Wherein the first configuration information is used for configuring a random access RA search space set in a first BWP, and the first BWP does not include a paging search space set. In the process of the first terminal performing RA in the RA search space set, the first terminal receives short message class information from the network device at the first BWP.

According to an aspect of the present application, the first terminal may receive the short message class information at the first BWP in a process in which the first terminal performs RA in an RA search space set within the first BWP. Therefore, the first terminal can acquire the short message class information without performing the RF handover. Therefore, by adopting the scheme of the application, the power consumption of the first terminal can be effectively reduced, and the access time delay of the first terminal is reduced.

With reference to the third aspect, in certain implementations of the third aspect, in the process of the first terminal performing RA in the RA search space set, the first terminal receives short message class information from the network device in the first BWP, including:

the first terminal receives short message type information from the network equipment at a first BWP, the short message type information is carried in a first PDSCH, and the first PDSCH is scheduled by a PDCCH scrambled by a random access radio network temporary identifier RA-RNTI. Or the first terminal receives short message type information from the network equipment at the first BWP, the short message type information is carried on the second PDCCH, the second PDCCH is scrambled through RA-RNTI, and the short message type information comprises public warning system PWS notification information. Or, the first terminal receives the short message type information from the network equipment at the first BWP, the short message type information is carried on the third PDCCH, and the third PDCCH is scrambled by the temporary cell radio network temporary identifier TC-RNTI.

In a fourth aspect, a communication method is provided, including:

the network device sends the first configuration information to the first terminal. Wherein the first configuration information is used to configure a random access RA search space set within the first bandwidth portion BWP, and the network device does not configure a paging search space set within the first BWP. In the process that the first terminal executes RA in the RA search space set, the network device sends short message class information to the first terminal in the first BWP.

According to an aspect of the present application, the network device may send short message class information to the first terminal at the first BWP in a process in which the first terminal performs RA in an RA search space set within the first BWP. Therefore, when the first terminal performs RA within the first BWP, it is not necessary to perform RF handover in order to acquire the short message class information. That is, the first terminal does not need to switch to the second BWP, and monitors the paging PDCCH in the paging search space set in the second BWP to obtain the short message type information. Therefore, by adopting the scheme of the application, the power consumption of the first terminal can be effectively reduced, and the access time delay of the first terminal is reduced.

With reference to the fourth aspect, in some implementations of the fourth aspect, in the process of the first terminal performing RA in the RA search space set, the sending, by the network device, short message class information to the first terminal in the first BWP includes:

the network equipment sends short message type information to a first terminal in a first BWP, the short message type information is carried in a first PDSCH, and the first PDSCH is scheduled by a PDCCH scrambled by a random access radio network temporary identifier RA-RNTI. Or the network device sends short message type information to the first terminal at the first BWP, the short message type information is carried on the second PDCCH, the second PDCCH is scrambled through RA-RNTI, and the short message type information comprises public warning system PWS notification information. Or the network equipment sends the short message type information to the first terminal in the first BWP, the short message type information is carried on a third PDCCH, and the third PDCCH is scrambled through a temporary cell radio network temporary identifier TC-RNTI.

In a fifth aspect, a communication method is provided, including:

the first terminal receives first configuration information from the network device. Wherein the first configuration information is used for configuring a paging search space set in the first bandwidth part BWP and in the second BWP, and the paging search space set is used for the first terminal to monitor the paging PDCCH. The first terminal receives first indication information for indicating the first terminal to listen to one BWP of a paging PDCCH from among the first BWP and the second BWP. The first terminal listens to the paging PDCCH in one BWP.

According to the scheme of the application, the network device may configure a paging search space set for the first terminal within the first BWP and the second BWP, and instruct the first terminal to monitor a paging PDCCH at the first BWP or the second BWP through the first indication information, thereby implementing dynamic paging load balancing.

With reference to the fifth aspect, in certain implementations of the fifth aspect, the first configuration information is further used to configure the paging occasion PO within the first BWP and within the second BWP.

The method further comprises the following steps:

the first terminal receives second indication information indicating that the first terminal listens to the first indication information at the second BWP.

With reference to the fifth aspect, in certain implementations of the fifth aspect, the first indication information is further used to indicate whether the first terminal monitors a paging PDCCH.

With reference to the fifth aspect, in some implementations of the fifth aspect, the second indication information is further used to indicate that the second terminal monitors the first indication information at the second BWP, and the first indication information is further used to indicate whether the second terminal monitors the paging PDCCH.

That is, according to the scheme of the present application, both the first indication information and the second indication information may be transmitted to the first type terminal and the second type terminal.

With reference to the fifth aspect, in some implementations of the fifth aspect, the first indication information includes a first bit field and a second bit field, the first bit field is used to indicate whether the first terminal and the second terminal monitor the paging PDCCH, and the second bit field is used to indicate that the first terminal monitors one BWP of the paging PDCCH from the first BWP and the second BWP.

With reference to the fifth aspect, in certain implementations of the fifth aspect, the configuration of the POs in the first BWP is the same as that in the second BWP, and the configuration of the POs includes: the proportion of the paging frames in the wireless frame, the paging frame offset and the number of paging occasions included in each paging frame, the first indication information is associated with N POs in a second BWP, and N is a positive integer.

For the ith PO of the N POs, the first bit field includes a bit i, which is used to indicate whether all terminals on the ith PO monitor the paging PDCCH. Or,

for the ith PO, the first bit field comprises a bit i1 and a bit i2, the bit i1 is used for indicating whether all the first class terminals on the ith PO monitor the paging PDCCH, the bit i2 is used for indicating whether all the second class terminals on the ith PO monitor the paging PDCCH, the first terminal belongs to the first class terminal, and the second terminal belongs to the second class terminal. Or,

for the ith PO, all the first class terminals on the ith PO are divided into x groups, all the second class terminals on the ith PO are divided into y groups, the first bit field comprises bits i1 to ix and bits i (x + 1) to i (x + y), the bits i1 to ix correspond to the x groups of terminals one by one, the bits i (x + 1) to i (x + y) correspond to the y groups of terminals one by one, each bit of the bits i1 to ix and the bits i (x + 1) to i (x + y) is used for indicating whether the corresponding group of terminals monitors the paging PDCCH, and x and y are positive integers. Or,

for the ith PO, all terminals on the ith PO are divided into j groups, at least one group of terminals in the j groups of terminals comprises at least one first-class terminal and at least one second-class terminal, a first bit field comprises bits i1 to ij, the bits i1 to ij correspond to the j groups of terminals one by one, each bit in the bits i1 to ij is used for indicating whether the corresponding group of terminals monitors the paging PDCCH, and j is a positive integer.

Wherein i is a positive integer less than or equal to N.

With reference to the fifth aspect, in some implementations of the fifth aspect, the configuration of the POs within the first BWP is the same as the configuration of the POs within the second BWP, and the configuration of the POs includes: the proportion of the paging frames in the wireless frame, the paging frame offset and the number of paging occasions included in each paging frame, the first indication information is associated with N POs in a second BWP, and N is a positive integer.

For the k PO of the N POs, the second bit field includes a bit k, where the bit k is used to indicate all the first class terminals on the k PO to monitor one BWP of the paging PDCCH, k is a positive integer less than or equal to N, and the first terminal belongs to the first class terminal. Or,

the first indication information is associated with M paging frames PF in the second BWP, and for the mth PF among the M PFs, the second bit field includes bit M, where the bit M is used to indicate all the first type terminals on all the POs included in the mth PF to monitor one BWP of the paging PDCCH, M is a positive integer, and M is a positive integer less than or equal to M. Or,

the second bit field includes 1 bit, and the 1 bit is used to indicate that all the first type terminals on all POs associated with the first indication information monitor one BWP of the paging PDCCH.

With reference to the fifth aspect, in some implementations of the fifth aspect, the partial configuration of the POs in the first BWP is the same as the partial configuration of the POs in the second BWP, the partial configuration includes a ratio of paging frames in a radio frame and a paging frame offset, and each paging frame in the first BWP includes a different number of paging occasions than the number of paging occasions included in each paging frame in the second BWP.

The number of POs associated with the first indication information in the first BWP is a first numerical value, and the number of POs associated with the first indication information in the second BWP is a second numerical value.

The first bit field comprises a number of bits associated with the second value. Or,

the first bit field includes a number of bits associated with the first value and the second value.

With reference to the fifth aspect, in certain implementations of the fifth aspect, the partial configuration of the POs in the first BWP is the same as the partial configuration of the POs in the second BWP, the partial configuration includes a ratio of paging frames in a radio frame and a paging frame offset, and each paging frame in the first BWP includes a different number of paging occasions from the number of paging occasions included in each paging frame in the second BWP.

The second bit field comprises a number of bits equal to the first value. Or,

the second bit field includes a number of bits equal to the second value. Or,

the second bit field includes a number of bits equal to the lesser of the first value and the second value. Or,

the second bit field comprises a number of bits equal to the greater of the first value and the second value. Or,

the second bit field includes a number of bits equal to a third value, the third value being a number of PFs associated with the first indication in the second BWP. Or,

the second bit field comprises 1 bit, wherein the 1 bit is used for indicating all the first-class terminals on all the POs associated with the first indication information to monitor one BWP of the paging PDCCH, and the first terminals belong to the first-class terminals.

With reference to the fifth aspect, in certain implementations of the fifth aspect, the first configuration information is further used to configure a random access, RA, search space set within the first BWP, the RA search space set being used for the first terminal to perform random access within the first BWP.

The method further comprises the following steps: when the first terminal performs random access within the first BWP, the first terminal receives a fourth DCI from the network device in the set of paging search spaces configured within the first BWP, the fourth DCI including short message class information.

According to the scheme of the application, in the process of performing RA in the first BWP, the first terminal may monitor the paging PDCCH in the paging search space set in the first BWP, thereby acquiring the short message class information. Therefore, in the process that the first terminal executes the RA in the first BWP, the first terminal can acquire the short message information without executing the RF switching, and the power consumption and the access delay of the first terminal are reduced.

In a sixth aspect, a communication method is provided, including:

the network device sends the first configuration information to the first terminal. Wherein the first configuration information is used for configuring a paging search space set in the first bandwidth part BWP and in the second BWP, and the paging search space set is used for the first terminal to monitor the paging PDCCH. The network device transmits first indication information for indicating the first terminal to listen to one BWP of a paging PDCCH from the first BWP and the second BWP.

With reference to the sixth aspect, in certain implementations of the sixth aspect, the first configuration information is further used to configure the paging occasion PO within the first BWP and within the second BWP.

The method further comprises the following steps:

the network device sends second indication information, and the second indication information indicates that the first terminal listens to the first indication information at the second BWP.

With reference to the sixth aspect, in some implementations of the sixth aspect, the first indication information is further used to indicate whether the first terminal monitors a paging PDCCH.

With reference to the sixth aspect, in certain implementations of the sixth aspect, the method further comprises:

and the network equipment sends the second configuration information to the second terminal.

Wherein the second configuration information is used to configure the paging search space set within the second BWP and to configure the PO within the second BWP.

With reference to the sixth aspect, in some implementations of the sixth aspect, the second indication information is further used to indicate that the second terminal monitors the first indication information at the second BWP, and the first indication information is further used to indicate whether the second terminal monitors the paging PDCCH.

With reference to the sixth aspect, in certain implementations of the sixth aspect, the first indication information includes a first bit field and a second bit field, the first bit field is used to indicate whether the first terminal and the second terminal monitor the paging PDCCH, and the second bit field is used to indicate one BWP, from among the first BWP and the second BWP, that the first terminal monitors the paging PDCCH.

With reference to the sixth aspect, in some implementations of the sixth aspect, the configuration of the POs within the first BWP and the configuration of the POs within the second BWP are the same, and the configuration of the POs includes: the proportion of the paging frames in the wireless frame, the paging frame offset and the number of paging occasions included in each paging frame, the first indication information is associated with N POs in a second BWP, and N is a positive integer.

For the ith PO of the N POs, the first bit field includes a bit i for indicating whether all terminals on the ith PO monitor the paging PDCCH. Or,

Wherein i is a positive integer less than or equal to N.

the first indication information is associated with M paging frames PF in a second BWP, and for an mth PF of the M PFs, the second bit field includes a bit M, the bit M is used to indicate that all first class terminals on all POs included in the mth PF monitor one BWP of the paging PDCCH, M is a positive integer, and M is a positive integer smaller than or equal to M. Or,

With reference to the sixth aspect, in some implementations of the sixth aspect, the partial configuration of the POs in the first BWP and the partial configuration of the PO in the second BWP are the same, the partial configuration includes a ratio of paging frames in a radio frame and a paging frame offset, and each paging frame in the first BWP includes a different number of paging occasions than the number of paging occasions included in each paging frame in the second BWP.

The second bit field includes a number of bits equal to the first value. Or,

the second bit field includes a number of bits equal to the second value. Or,

the second bit field includes a number of bits equal to a third value, where the third value is the number of PFs associated with the first indication in the second BWP. Or,

With reference to the sixth aspect, in some implementations of the sixth aspect, the first configuration information is further used to configure a random access, RA, search space set within the first BWP, the RA search space set being used for the first terminal to perform random access within the first BWP.

The method further comprises the following steps:

and the network equipment transmits fourth DCI in the paging search space set configured in the first BWP, wherein the fourth DCI comprises short message type information.

According to the scheme of the application, in the process that the first terminal performs RA in the first BWP, the network device may send fourth DCI to the first terminal in the paging search space set in the first BWP, so that the first terminal acquires the short message class information from the fourth DCI. Therefore, in the process that the first terminal executes the RA in the first BWP, the first terminal can acquire the short message information without executing the RF switching, and the power consumption and the access delay of the first terminal are reduced.

In a seventh aspect, a communication method is provided, including:

the first terminal receives a first synchronization signal block SSB from the network equipment, wherein the first SSB comprises a physical broadcast channel PBCH, the PBCH is used for carrying master information block MIB information, and the first SSB is used for determining a first cell connected with the first terminal. And the first terminal determines to connect the first cell according to the first SSB. The first terminal receives configuration information of the second SSB from the network device at the first cell. The first terminal receives a second SSB from the network device, the second SSB not including the PBCH, the second SSB including at least one secondary synchronization signal SSS. And the first terminal performs measurement according to the second SSB.

According to the scheme of the present application, when the first BWP configured for the first terminal does not include the first SSB (the first SSB is not received at the first BWP), the second SSB may be configured for the first terminal at the first BWP, so that the first terminal may perform measurement. In addition, the PBCH may not be included in the second SSB, thereby reducing power consumption of the network device and saving resource overhead.

With reference to the seventh aspect, in certain implementations of the seventh aspect, the second SSB includes 1 SSS, and the 1 SSS occupies a third orthogonal frequency division multiplexing OFDM symbol.

With reference to the seventh aspect, in some implementations of the seventh aspect, the second SSB further includes 1 PSS, the 1 PSS occupies the first OFDM symbol, the first OFDM symbol is located before the third OFDM symbol, and only the second OFDM symbol is spaced between the first OFDM symbol and the third OFDM symbol. Or,

the second SSB further comprises 1 SSS, and the 1 SSS further occupies the first OFDM symbol. Or,

the second SSB further includes 1 PSS and 2 SSS, where 1 PSS occupies the first OFDM symbol, 2 SSS occupy the second OFDM symbol and the fourth OFDM symbol, respectively, and the fourth OFDM symbol is the first OFDM symbol after the third OFDM symbol. Or,

the second SSB further includes 3 SSSs, and the 3 SSSs occupy the first OFDM symbol, the second OFDM symbol, and the fourth OFDM symbol, respectively. Or,

the second SSB further includes 1 PSS and 1 SSS, the 1 PSS occupying the first OFDM symbol, and the 1 SSS occupying the fourth OFDM symbol or the second OFDM symbol. Or,

the second SSB further includes 2 SSSs, where the 2 SSSs occupy the second OFDM symbol and the fourth OFDM symbol, respectively, or the 2 SSSs occupy the first OFDM symbol and the second OFDM symbol, respectively.

With reference to the seventh aspect, in some implementations of the seventh aspect, the PSS or SSS on any one OFDM symbol of the second SSB occupies the same frequency domain range.

With reference to the seventh aspect, in some implementations of the seventh aspect, the second SSB further includes 1 PSS and a demodulation reference signal DMRS, where the 1 PSS occupies a first OFDM symbol, the first OFDM symbol is located before a third OFDM symbol, only a second OFDM symbol is spaced between the first OFDM symbol and the third OFDM symbol, the DMRS allows the second OFDM symbol, the third OFDM symbol, and a fourth OFDM symbol to be occupied, and the fourth OFDM symbol is a first OFDM symbol after the third OFDM symbol.

The 1 PSS and the 1 SSS occupy 127 resource elements RE, respectively, and the frequency domain range occupied by the 1 PSS and the 1 SSS is the same.

The DMRS allows 60 REs on the second OFDM symbol to be occupied, 24 REs on the third OFDM symbol to be occupied, and 60 REs on the fourth OFDM symbol to be occupied.

An ith RE of the 60 REs on the second OFDM symbol is the same in frequency as an ith RE of the 60 REs on the fourth OFDM symbol, and the second OFDM symbol or a j +1 th RE of the 60 REs on the fourth OFDM symbol is shifted by 4 REs with respect to the jth RE, i is a positive integer equal to or less than 60, and j is a positive integer equal to or less than 59.

A frequency of a kth RE of the 24 REs on the third OFDM symbol is the same as a frequency of a kth RE of the 60 REs on the second OFDM symbol, and k is a positive integer of 12 or less.

The frequency of the mth RE of the 24 REs on the third OFDM symbol is the same as the frequency of the m +36 th RE of the 60 REs on the second OFDM symbol, and m is a positive integer equal to or greater than 13 and equal to or less than 24.

With reference to the seventh aspect, in certain implementations of the seventh aspect, the method further includes:

and the first terminal receives downlink data in a physical resource block PRB which does not transmit the second SSB. Or,

the first terminal receives downlink data at an RE not transmitting the second SSB.

The downlink data includes at least one of: the physical downlink shared channel PDSCH, the physical downlink control channel PDCCH and the downlink reference signal, wherein the downlink reference signal comprises at least one of the following signals: channel state information reference signals, CSI-RS, tracking reference signals, TRS, positioning reference signals, PRS, etc.

According to the scheme of the application, the network equipment can send the downlink data in the saved time-frequency resources, so that the utilization rate of the time-frequency resources is improved.

With reference to the seventh aspect, in certain implementations of the seventh aspect, the frequency of the first SSB is different from the frequency of the second SSB. The second SSB has a second period, the first SSB has a first period, and the second period is less than or equal to the first period.

With reference to the seventh aspect, in some implementations of the seventh aspect, the second SSB is located in the second half frame, and the first SSB is located in the first half frame. The number of the first SSBs included in the first half frame and the number of the second SSBs included in the second half frame are both Q, and Q is a positive integer. The qth first SSB included in the first field and the qth second SSB included in the second field have a quasi co-located QCL relationship, the QCL relationship comprising at least one of: the quasi co-location type A QCL-TypeA and the quasi co-location type D QCL-TypeD are used, and Q is a positive integer less than or equal to Q.

In an eighth aspect, a communication method is provided, including:

the network equipment sends a first synchronization signal block SSB to the first terminal, wherein the first SSB comprises a physical broadcast channel PBCH, the PBCH is used for carrying master information block MIB information, and the first SSB is used for determining a first cell connected with the first terminal. And the network equipment sends the configuration information of the second SSB to the first terminal in the first cell. And the network equipment sends a second SSB to the first terminal according to the configuration information of the second SSB, wherein the second SSB does not include PBCH, and the second SSB includes at least one secondary synchronization signal SSS.

According to the scheme of the present application, when the first BWP configured for the first terminal does not include the first SSB (the first terminal does not receive the first SSB at the first BWP), the second SSB may be configured for the first terminal at the first BWP, so that the first terminal may perform measurement. In addition, the PBCH may not be included in the second SSB, thereby reducing power consumption of the network device and saving resource overhead.

With reference to the eighth aspect, in certain implementations of the eighth aspect, the second SSB includes 1 SSS, and the 1 SSS occupies a third orthogonal frequency division multiplexing, OFDM, symbol.

With reference to the eighth aspect, in some implementations of the eighth aspect, the second SSB further includes 1 PSS, the 1 PSS occupies the first OFDM symbol, the first OFDM symbol is located before the third OFDM symbol, and only the second OFDM symbol is spaced between the first OFDM symbol and the third OFDM symbol. Or,

the second SSB further comprises 1 SSS, the further 1 SSS occupying the first OFDM symbol. Or,

the second SSB further includes 1 PSS and 2 SSS, where 1 PSS occupies the first OFDM symbol, 2 SSS occupies the second OFDM symbol and the fourth OFDM symbol, respectively, and the fourth OFDM symbol is the first OFDM symbol after the third OFDM symbol. Or,

With reference to the eighth aspect, in certain implementations of the eighth aspect, the PSS or SSS on any one OFDM symbol of the second SSB occupies the same frequency domain range.

With reference to the eighth aspect, in some implementations of the eighth aspect, the second SSB further includes 1 PSS occupying a first OFDM symbol, and the first OFDM symbol is located before a third OFDM symbol, and only a second OFDM symbol is spaced between the first OFDM symbol and the third OFDM symbol, and the DMRS allows occupation of the second OFDM symbol, the third OFDM symbol, and a fourth OFDM symbol, and the fourth OFDM symbol is a first OFDM symbol after the third OFDM symbol.

The frequency of the kth RE of the 24 REs on the third OFDM symbol is the same as the frequency of the kth RE of the 60 REs on the second OFDM symbol, and k is a positive integer of 12 or less.

With reference to the eighth aspect, in some implementations of the eighth aspect, the method further includes:

and the network equipment sends downlink data in the physical resource block PRB which does not transmit the second SSB. Or,

and the network equipment sends the downlink data at the RE which does not transmit the second SSB.

With reference to the eighth aspect, in certain implementations of the eighth aspect, the frequency of the first SSB is different from the frequency of the second SSB. The second SSB has a second period, the first SSB has a first period, and the second period is less than or equal to the first period.

With reference to the eighth aspect, in some implementations of the eighth aspect, the second SSB is located in the second field, and the first SSB is located in the first field. The number of the first SSBs included in the first field and the number of the second SSBs included in the second field are both Q, and Q is a positive integer. The qth first SSB comprised by the first field and the qth second SSB comprised by the second field have a quasi co-located QCL relationship comprising at least one of: the quasi co-location type A QCL-TypeA and the quasi co-location type D QCL-TypeD are used, and Q is a positive integer less than or equal to Q.

In a ninth aspect, there is provided a communication apparatus comprising:

the device comprises a transceiving unit and a processing unit connected with the transceiving unit. A transceiving unit for receiving first configuration information from a network device. Wherein the first configuration information is used to configure the paging search space set within the first bandwidth portion BWP and the second BWP. When the first BWP is active BWP, the transceiver unit is further configured to receive first downlink control information DCI in the paging search space set configured in the first BWP, where the first DCI includes short message class information, and the first DCI is not used to schedule a paging physical downlink shared channel PDSCH. When the second BWP is the active BWP, the transceiver unit is further configured to receive a second DCI in the paging search space set configured in the second BWP, where the second DCI includes short message class information, and the second DCI is capable of scheduling a paging PDSCH.

It should be understood that the processing unit may be configured to decode the first DCI and the second DCI, thereby obtaining the short message class information.

In a tenth aspect, there is provided a communication apparatus including:

the device comprises a transceiving unit and a processing unit connected with the transceiving unit.

And the transceiving unit is used for sending the first configuration information to the first terminal.

Wherein the first configuration information is used to configure the paging search space set within the first bandwidth portion BWP and the second BWP.

The transceiver unit is further configured to send first downlink control information DCI to the first terminal in the paging search space set configured in the first BWP, where the first DCI includes short message class information, and the first DCI is not used to schedule a paging physical downlink shared channel PDSCH.

And the transceiving unit is further configured to transmit a second DCI in the paging search space set configured in the second BWP, where the second DCI includes short message class information, and the second DCI is capable of scheduling a paging PDSCH.

It should be understood that the processing unit may be configured to generate the first configuration information, the first DCI, and the second DCI.

In an eleventh aspect, there is provided a communication apparatus comprising:

A transceiving unit for receiving first configuration information from a network device.

Wherein the first configuration information is used for configuring a random access RA search space set in a first BWP, and the first BWP does not include a paging search space set.

The transceiving unit is further configured to receive short message class information from the network device at the first BWP during the RA performed by the first terminal in the RA search space set.

With reference to the eleventh aspect, in certain implementations of the eleventh aspect, the transceiving unit is further configured to receive short message class information from the network device at the first BWP, the short message class information being carried on the first PDSCH scheduled by the PDCCH scrambled by the random access radio network temporary identity, RA-RNTI. Or,

the transceiving unit is further configured to receive short message class information from the network device in the first BWP, where the short message class information is carried on the second PDCCH, the second PDCCH is scrambled by the RA-RNTI, and the short message class information includes PWS notification information of the public warning system. Or,

and the transceiving unit is further configured to receive short message class information from the network device at the first BWP, where the short message class information is carried in a third PDCCH, and the third PDCCH is scrambled by a temporary cell radio network temporary identifier TC-RNTI.

In a twelfth aspect, a communication apparatus is provided, including:

The transceiving unit sends first configuration information to the first terminal.

Wherein the first configuration information is used to configure a random access RA search space set within the first bandwidth portion BWP, and the network device does not configure a paging search space set within the first BWP.

The transceiver unit is further configured to send the short message class information to the first terminal at the first BWP during the RA performed by the first terminal in the RA search space set.

With reference to the twelfth aspect, in some implementations of the twelfth aspect, the transceiving unit is further configured to send short message class information to the first terminal in the first BWP, where the short message class information is carried on the first PDSCH scheduled by a PDCCH scrambled by a random access radio network temporary identity, RA-RNTI. Or,

and the transceiving unit is also used for sending short message information to the first terminal at the first BWP, wherein the short message information is carried on a second PDCCH, the second PDCCH is scrambled by an RA-RNTI, and the short message information comprises public warning system PWS notification information. Or,

and the transceiving unit is also used for sending short message type information to the first terminal at the first BWP, wherein the short message type information is carried in a third PDCCH, and the third PDCCH is scrambled by a temporary cell radio network temporary identifier TC-RNTI.

In a thirteenth aspect, a communication apparatus is provided, including:

Wherein the first configuration information is used for configuring a paging search space set in the first bandwidth part BWP and in the second BWP, and the paging search space set is used for the first terminal to monitor the paging PDCCH.

The transceiver unit is further configured to receive first indication information, where the first indication information is used to indicate that the first terminal monitors one BWP of the paging PDCCH from the first BWP and the second BWP.

And the processing unit is used for monitoring the paging PDCCH in a BWP.

With reference to the thirteenth aspect, in certain implementations of the thirteenth aspect, the first configuration information is further used to configure the paging occasion PO within the first BWP and within the second BWP.

The transceiving unit is further configured to receive second indication information, where the second indication information indicates that the first terminal listens to the first indication information in the second BWP.

With reference to the thirteenth aspect, in certain implementations of the thirteenth aspect, the first configuration information is further used to configure a random access, RA, search space set within the first BWP, the RA search space set being used for the first terminal to perform random access within the first BWP.

When the first terminal performs random access in the first BWP, the transceiving unit is further configured to receive a fourth DCI from the network device in the paging search space set configured in the first BWP, where the fourth DCI includes short message class information.

In a fourteenth aspect, a communication apparatus is provided, including:

The first configuration information is used for configuring a paging search space set in a first bandwidth part BWP and in a second BWP, and the paging search space set is used for the first terminal to monitor a paging PDCCH.

The transceiver unit is further configured to transmit first indication information, where the first indication information is used to indicate that the first terminal monitors one BWP of the paging PDCCH from the first BWP and the second BWP.

With reference to the fourteenth aspect, in some implementations of the fourteenth aspect, the first configuration information is further used to configure the paging occasion PO within the first BWP and within the second BWP.

The transceiver unit is further configured to send second indication information, where the second indication information indicates that the first terminal listens to the first indication information at the second BWP.

With reference to the fourteenth aspect, in some implementations of the fourteenth aspect, the transceiver unit is further configured to send the second configuration information to the second terminal.

With reference to the fourteenth aspect, in certain implementations of the fourteenth aspect, the first configuration information is further used to configure a random access, RA, search space set within the first BWP, the RA search space set being used for the first terminal to perform random access within the first BWP.

The transceiving unit is further configured to transmit fourth DCI in the paging search space set configured in the first BWP, where the fourth DCI includes short message class information.

In a fifteenth aspect, a communication device is provided, comprising:

A transceiving unit, configured to receive a first synchronization signal block SSB from a network device, where the first SSB includes a physical broadcast channel PBCH, the PBCH is used to carry master information block MIB information, and the first SSB is used to determine a first cell to which a first terminal is connected.

And the processing unit is used for determining to connect the first cell according to the first SSB.

And the transceiving unit is further used for receiving the configuration information of the second SSB from the network equipment in the first cell.

A transceiver unit, further configured to receive a second SSB from the network device, where the second SSB does not include the PBCH and includes at least one secondary synchronization signal SSS.

And the processing unit is also used for carrying out measurement according to the second SSB.

With reference to the fifteenth aspect, in certain implementations of the fifteenth aspect,

and the transceiving unit is further used for receiving downlink data in a physical resource block PRB which does not transmit the second SSB. Or,

and the transceiving unit is further configured to receive downlink data at an RE not transmitting the second SSB.

In a sixteenth aspect, a communication apparatus is provided, including:

A transceiving unit, configured to send a first synchronization signal block SSB to a first terminal, where the first SSB includes a physical broadcast channel PBCH, the PBCH is used to carry information of a master information block MIB, and the first SSB is used to determine a first cell to which the first terminal is connected.

And the transceiving unit is further used for sending the configuration information of the second SSB to the first terminal in the first cell.

And the transceiver unit is further configured to send a second SSB to the first terminal according to the configuration information of the second SSB, where the second SSB does not include the PBCH and includes at least one secondary synchronization signal SSS.

With reference to the sixteenth aspect, in certain implementations of the sixteenth aspect,

and the transceiving unit is further used for sending downlink data in the physical resource block PRB which does not transmit the second SSB. Or,

and the transceiving unit is further configured to send downlink data at an RE not transmitting the second SSB.

In a seventeenth aspect, a communication device is provided that includes a communication interface and at least one processor. The memory is used for storing a computer program, and the processor executes the computer program or instructions stored by the memory when the communication device is running, so that the communication device executes the method of the first aspect or its various implementations. Or cause the communication device to perform the method of the second aspect or its various implementations. Alternatively, the communication device is caused to perform the method of the third aspect or its various implementations. The memory may be located in the processor, or may be implemented by a chip independent from the processor, and the application is not limited in this respect.

In an eighteenth aspect, there is provided a computer readable storage medium comprising a computer program which, when run on a computer, causes the computer to perform the method of the first aspect or its various implementations. Or cause a computer to perform a method of the second aspect or its various implementations. Or cause a computer to perform a method of the third aspect or its various implementations.

In a nineteenth aspect, there is provided a chip having processing circuitry disposed thereon for performing the method of the first aspect or its various implementations. Alternatively, the processing circuitry is adapted to perform the method of the second aspect or its various implementations. Alternatively, the processing circuitry is adapted to perform a method of the third aspect or its various implementations.

In a twentieth aspect, there is provided a computer program product comprising: a computer program (which may also be referred to as code, or instructions), which when executed, causes a computer to perform the method of the first aspect or its various implementations. Or cause a computer to perform a method of the second aspect or its various implementations. Or cause a computer to perform a method of the third aspect or its various implementations.

Drawings

Fig. 1 shows a system architecture to which an embodiment of the present application is applicable.

Fig. 2 shows an example of a schematic interaction diagram of the method proposed in the present application.

Fig. 3 shows an exemplary schematic interaction diagram of the method proposed by the present application.

Fig. 4 shows an exemplary schematic interaction diagram of the method proposed by the present application.

Fig. 5 shows an exemplary schematic interaction diagram of the method proposed in the present application.

Fig. 6 shows a time-frequency format of the first SSB.

Fig. 7 shows several possible time-frequency formats of the second SSB.

Fig. 8 shows a schematic block diagram of a communication device provided by the present application.

Fig. 9 shows a schematic block diagram of a communication device provided by the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

Fig. 1 is a schematic diagram of a wireless communication system 100 suitable for use with embodiments of the present application.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: long Term Evolution (LTE) System, LTE Frequency Division Duplex (FDD) System, LTE Time Division Duplex (TDD), universal Mobile Telecommunications System (UMTS), worldwide Interoperability for Microwave Access (WiMAX) communication System, fifth generation (5 th generation, 5G) System or New Radio (NR), and future next generation communication systems, such as 6G, etc.

A terminal in the embodiments of the present application may refer to a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a terminal device, a wireless communication device, a user agent, or a user equipment. The terminal may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with Wireless communication function, a computing device or other processing device connected to a Wireless modem, a vehicle-mounted device, a wearable device, a terminal in a 5G Network or a terminal in a Public Land Mobile Network (PLMN) for future evolution, and the like, which is not limited in this embodiment of the present application.

The Network device in this embodiment may be a device for communicating with a terminal, where the Network device may be an evolved NodeB (eNB or eNodeB) in an LTE system, and may also be a wireless controller in a Cloud Radio Access Network (CRAN) scenario, or the Network device may be a relay station, an Access point, a vehicle-mounted device, a wearable device, a Network device in a 5G Network, or a Network device in a future evolved PLMN Network, and the like, and the embodiment of the present application is not limited.

According to the third generation partnership project (3 rd generation partnership project,3 gpp) protocol, 5G networks use mainly two frequencies: the FR1 frequency band and the FR2 frequency band. The frequency range of the FR1 frequency band is 450MHz to 6GHz, also called sub 6GHz frequency band, low frequency; the frequency range of the FR2 band is 24.25GHz to 52.6GHz, commonly referred to as millimeter wave, high frequency.

Currently, NR is discussing a new UE type, called reduced capability (RedCap) UE.

It has been determined that the NR reccap UE has a maximum bandwidth capability of supporting 20MHz at FR1 specified by 3 GPP. In FR2, the maximum bandwidth capability of a redmap UE supports 100MHz.

Currently, the capability of a general NR eMBB UE supports a bandwidth of 100MHz at FR1 and a bandwidth of 200MHz at FR2, wherein a bandwidth of 400MHz at FR2 is optionally supported.

The reason why the NR reccap UE supports a smaller bandwidth capability than the existing NR UE (e.g., eMBB UE) is that the smaller bandwidth capability may reduce the implementation complexity of the UE and save the UE power consumption. This is advantageous for reducing the cost of the UE.

Currently considered NR red map UEs include 3 large application scenarios: wearable devices (webables), industrial wireless sensors (industrial wireless sensors) and Video surveillance (Video surveillance) devices.

Further, the terminals in the embodiment of the present application include a first type terminal and a second type terminal. The first type of terminal is a reduced capability (RedCap) terminal, and may be referred to as a RedCap UE. Terminals in the New Radio (NR) system except the first type of terminals are terminals of a second type, which may be referred to as legacy UEs, or Normal UEs, such as Normal UEs including NR enhanced mobile broadband (eMBB) UEs, high-reliability low-latency communication (URLLC) UEs, and so on. Hereinafter, the first terminal belongs to a first class of terminal, and the second terminal belongs to a second class of terminal.

In addition, it is currently considered to configure a dedicated (or separate) initial downlink bandwidth part (BWP) for the reccap UE. The reason is as follows:

reason 1: to expand the system capacity, load balancing (offloading) may introduce an initial downlink BWP for the red map UE alone.

In a system where NR Normal UE and NR reload UE coexist, regardless of whether Normal UE or reload UE, downlink data in an initial access phase is transmitted in an initial downlink BWP, and for example, a Physical Downlink Control Channel (PDCCH) for scheduling Msg2/4, a paging PDCCH for scheduling a paging message, and the like are transmitted in a control-resource set (core) #0 in a random access procedure (random access procedure). As the number of Normal UEs and red UEs increases, channel congestion, such as PDCCH congestion (PDCCH blocking), may be caused during the initial access phase. To improve system capacity and balance UE load, it is currently discussed whether to introduce one or more initial downlink BWPs in addition to the existing initial downlink BWPs for data transmission of a reccap UE.

Herein, the first BWP is one or more additionally referenced initial downlink BWPs, which may also be referred to as redcap initial downlink BWP, or redcap specific initial DL BWP, or separate initial downlink BWP (separate initial DL BWP), without limitation.

Herein, the second BWP is an existing initial downlink BWP. The second BWP may also be referred to as legacy initial downlink BWP without limitation.

Reason 2: in a Time Division Duplex (TDD) system, a new initial uplink BWP may be introduced to a reccp UE, and in order to maintain the center frequency alignment of the initial uplink BWP and the initial downlink BWP, the reccp UE may introduce a new initial downlink BWP.

Due to the high bandwidth capability of Normal UE, for example, radio frequency bandwidth capability of 100MHz is supported in frequency range 1 (frequency range 1, fr1). Therefore, the bandwidth of the initial uplink BWP configured by the network device for the Normal UE may exceed the maximum bandwidth capability supported by the reccap UE. In order to support uplink transmission of a recmap UE, so that the data of the recmap UE is within the bandwidth supported by the recmap UE, a new initial uplink BWP may be configured for the recmap UE, and the bandwidth of the new initial uplink BWP should not exceed the maximum bandwidth capability supported by the recmap UE.

To distinguish from legacy's initial upgoing BWP, the newly introduced initial upgoing BWP is referred to as a RedCap initial upgoing BWP.

In a TDD system, an upstream BWP and a downstream BWP will form a BWP pair (BWP pair), which have the same ID. The upstream BWP and downstream BWP of a BWP pair have the same center frequency. For example, the initial upstream BWP and the initial downstream BWP are a BWP pair, and should have the same center frequency. The BWP ID of the initial BWP is generally considered to be 0.

The newly introduced red map initial uplink BWP for the red map UE may not be aligned with the center frequency of the Legacy initial downlink BWP, for example, not aligned with the center frequency of core information block (MIB) configured in CORESET #0, or not aligned with the center frequency of the Legacy initial downlink BWP configured in SIB 1. Therefore, in addition to the reason for the above capacity expansion, an initial downlink BWP may be newly introduced to the reccap UE in order to keep the initial uplink BWP center frequency alignment of the reccap UE.

On this basis, a random access search space set can be configured for the RedCap UE at the downlink BWP dedicated to the RedCap UE. However, when the reccap UE performs random access, radio frequency handover needs to be performed to acquire short message type information such as system message change, and paging PDCCH is monitored in legacy initial downlink BWP, which increases power consumption of the reccap UE. If the rectap UE does not perform radio frequency handover, the rectap UE may not acquire the short message class information in time, may initiate random access multiple times and fail multiple times, resulting in an increase in power consumption and access delay of the rectap UE.

Based on this, the present application proposes a method 200 and a method 300. The method 200 and the method 300 are described in detail below with reference to fig. 2 and 3.

Fig. 2 is a schematic diagram of a communication method 200 according to an embodiment of the present application. The method 200 comprises the steps of:

s201, a network device sends first configuration information to a first terminal, where the first configuration information is used to configure a paging search space set in a first bandwidth part (BWP) and a second BWP, where the paging search space set in the second BWP is used for the first terminal to monitor a paging PDCCH in the second BWP to monitor short message type information or to monitor whether the first terminal is paged, and the paging search space set in the first BWP is used for the first terminal to monitor the paging PDCCH in the first BWP to monitor short message type information. Accordingly, the first terminal receives the first configuration information.

Optionally, as a case, the configuration of the first BWP intra-page search space set is the same as the configuration of the second BWP intra-page search space set, and the configuration of the page search space set includes at least one of: monitoring period, period offset, the number of continuous time slots of each monitoring occasion, monitoring symbols in the monitoring occasions, PDCCH aggregation level of a candidate physical downlink control channel, the number of PDCCH candidates corresponding to the PDCCH aggregation level of the candidate, search space set type and DCI format related to search space.

One implementation is that the configuration of the first BWP intra-page search space set is identical to the configuration of the second BWP intra-page search space set. In this way, the network device only needs to use the same paging search space set as in the second BWP, and does not need to separately configure the paging search space set for the first BWP, i.e., does not need to configure new Radio Resource Control (RRC) signaling, thereby saving signaling overhead.

As an example, the first configuration information includes a configuration of the second BWP intra-page search space set and indication information # a indicating that the configuration of the first BWP intra-page search space set is the same as the configuration of the second BWP intra-page search space set.

For another example, the configuration of the second BWP intra-page search space set is included in the first configuration information, and the configuration of the first BWP intra-page search space set may be predefined by a protocol to be the same as the configuration of the second BWP intra-page search space set. At this time, the network apparatus does not need to transmit the indication information # a to the first terminal.

Alternatively, as another case, a configuration of the first BWP intra-page search space set is different from a configuration of the second BWP intra-page search space set.

As an example, the first configuration information includes a configuration of a first intra-BWP paging search space set and a configuration of a second intra-BWP paging search space set.

In addition, the first configuration information is further used to configure a Random Access (RA) search space set within the first BWP, and configure a Paging Occasion (PO) within the first BWP and the second BWP, wherein the RA search space set is used for the first terminal to perform RA within the first BWP.

Optionally, as a case, the configuration of the POs within the first BWP and the configuration of the POs within the second BWP are the same. Wherein the configuration of the PO includes at least one of:

a default paging cycle, a ratio of a paging frame in a radio frame, a paging frame offset, a number of paging occasions included in each paging frame, and a time domain position of a Physical Downlink Control Channel (PDCCH) monitoring occasion of each PO included in the paging frame. The configuration of the PO will not be described in detail below.

In one implementation, the configuration of the PO as above includes the same parameters within both BWPs. In this way, the ratio of paging frames in the first BWP and the second BWP in the radio frame and the number of paging occasions in the paging frame are the same. Since the paging frame offset is also the same, the paging frames of the two BWPs are also aligned in the time domain, i.e.: if a wireless frame is a paging frame in the second BWP, the wireless frame with the same time as the wireless frame is also a paging frame in the first BWP, otherwise, a wireless frame is not a paging frame in both the second BWP and the first BWP. For the first terminal, the PO belonging to the first terminal has the same temporal position within the two BWPs. It is to be understood that the two BWPs refer to a first BWP and a second BWP, which are the same hereinafter.

It should be understood that the PO belonging to the first terminal may also be referred to as the first terminal's own PO, that is, the first terminal calculates its own PO, or the PO corresponding to the first terminal, and the first terminal may also be referred to as the terminal on its corresponding PO.

In this way, it is equivalent to copy all paging occasions in the second BWP to the first BWP, and the time domain positions of the POs belonging to the first terminal in the two BWPs are the same, which is simple for the first terminal, the first terminal does not need to readjust the position of the PO after switching between the two BWPs, and the first terminal can monitor the paging PDCCH in the PO belonging to the first terminal at the same time domain position no matter which BWP the first terminal is in, which can ensure that the first terminal can monitor the PO belonging to the first terminal in each paging Discontinuous Reception (DRX) cycle, so that the probability that the first terminal misses the short message type information is reduced.

In an example, the first configuration information includes a configuration of a PO in the second BWP and indication information # B, where the indication information # B is used to indicate that the configuration of the PO in the first BWP is the same as the configuration of the PO in the second BWP.

For another example, the configuration of the PO in the second BWP is included in the first configuration information, and it may be predefined by the protocol that the configuration of the PO in the first BWP is the same as the configuration of the PO in the second BWP. At this time, the network device does not need to transmit the instruction information # B to the first terminal.

Optionally, as another case, the partial configuration of the POs in the first BWP is the same as the partial configuration of the PO in the second BWP, where the partial configuration includes the proportion of the paging frame in the radio frame and the paging frame offset;

the number of paging occasions in the first BWP intra-paging frame is less than the number of paging occasions in the second BWP intra-paging frame.

In one example, the number of paging occasions in the paging frame in the second BWP is not limited, and the number of paging occasions in the paging frame in the first BWP is defined to be equal to 1.

For another example, the first configuration information includes a configuration of the number of paging occasions in the first BWP intra-paging frame and a configuration of the number of paging occasions in the second BWP intra-paging frame.

In this way, when the first BWP indicates the red cp initial downlink BWP and the second BWP indicates the Legacy initial downlink BWP, the number of paging frames in the red cp initial downlink BWP is the same as the number of paging frames in the Legacy initial downlink BWP, but the total number of paging occasions in the red cp initial downlink BWP is less than or equal to the total number of paging occasions in the Legacy initial downlink BWP.

Optionally, when the number of paging occasions in the first BWP intra-paging frame is smaller than the number of paging occasions in the second BWP intra-paging frame, the formula for the UE to calculate its PO in the two BWPs may refer to the existing 3GPP protocol.

It should be understood that the first configuration information may be carried by one message or by multiple messages, without limitation. For example, a first portion of the first configuration information is carried by SIB1 and a second portion of the first configuration information is carried by SIB 2.

S202, the network device sends a second DCI in the paging search space set configured in the second BWP, where the second DCI includes short message class information, and the second DCI is capable of scheduling a paging PDSCH. Accordingly, the first terminal receives the second DCI when the second BWP is the active BWP.

The first terminal may monitor a paging PDCCH in a paging search space set configured within the second BWP before the first terminal performs RA. When the network device needs to send the short message class information to the first terminal, the network device may send the second DCI in the paging search space set configured in the second BWP.

It should be understood that the second DCI is also capable of scheduling a paging Physical Downlink Shared Channel (PDSCH). That is, the second DCI has the same function as the DCI carried by the current paging PDCCH.

For example, the second BWP is Legacy initial downlink BWP, and in an RRC idle (idle) state or an RRC inactive state, the first terminal monitors a paging PDCCH in the second BWP when not performing RA to monitor whether the first terminal is paged.

Wherein, the short message class information includes but is not limited to one or more of the following items:

system information update (SI update, or system information modification) information, public Warning System (PWS) notification information. The PWS notification information includes: earthquake/tsunami warning system (ETWS) notification information, commercial Mobile Alert Service (CMAS) notification information.

The description of the short message information is omitted below.

S203, the network device sends a first DCI to the first terminal in the paging search space set configured in the first BWP, where the first DCI includes short message type information, and the first DCI is not used to schedule a paging PDSCH. Accordingly, the first terminal receives the first DCI.

Since the network device configures the RA search space set of the first terminal in the first BWP, when the first terminal is paged, the first terminal performs Radio Frequency (RF) handover (switch or return), switches from the second BWP to the first BWP, and performs RA in the RA search space set configured in the first BWP.

In the process of executing RA by the first terminal, if the network equipment needs to send short message class information to the first terminal. The network device may transmit first DCI to the first terminal in a set of paging search spaces configured within a first BWP. Accordingly, the first terminal may monitor the paging PDCCH in the PO belonging to the first terminal in the paging search space set configured in the first BWP during the RA execution, and thus may acquire the short message class information from the first DCI.

According to the scheme of the application, in the process of performing RA by the first BWP, in order to acquire short message class information, the first terminal may monitor a paging PDCCH in a paging search space set configured in the first BWP. The first terminal does not need to perform RF handover, that is, the first terminal does not need to handover to the second BWP, and monitors the paging PDCCH in the paging search space set configured in the second BWP to obtain the short message type information. Therefore, by adopting the scheme of the application, the power consumption of the first terminal can be effectively reduced, the access time delay is reduced, the time delay for acquiring the short message information is reduced, and the complexity of the UE is reduced.

It should be understood that in an RRC idle state or an RRC inactive (RRC inactive) state, when the first BWP is an active BWP, the first terminal monitors a paging PDCCH at a PO belonging to the first terminal, and does not monitor the paging PDCCH at the POs of other terminals.

It should be understood that if the first terminal does not encounter a PO belonging to the first terminal when the rdcap initial downlink BWP performs the RA procedure, the first terminal does not need to monitor the paging PDCCH and switch the RF to Legacy initial downlink BWP when performing the RA procedure.

It should be understood that the process of the first terminal performing RA at the first BWP includes the first terminal listening to the RA-RNTI or TC-RNTI scrambled PDCCH at the first BWP. For example, when the first BWP performs RA, if the random access response window of the first terminal overlaps with the PO belonging to the first terminal, the first terminal monitors the paging PDCCH at the PO belonging to the first terminal. For another example, if the random access contention resolution timer (ra-ContentionResolutionTimer) of the first terminal runs and encounters a PO belonging to the first terminal, the first terminal monitors a paging PDCCH at the PO belonging to the first terminal.

In addition, if the first terminal belongs to the RRC connected state in the first BWP, the first terminal may also monitor the paging PDCCH at the PO that does not belong to the first terminal to obtain the short message class information.

It should be understood that if a short message type information notification occurs, such as an update of a system message occurs, or the network device needs to send a PWS notification, the network device sends a paging PDCCH for carrying short message type information at both the first BWP and the second BWP.

Optionally, the paging PDCCH sent by the network device on the paging search space set configured in the red initial downlink BWP is also scrambled by a paging-radio network temporary identity (P-RNTI). That is, the first DCI is also scrambled by the P-RNTI.

It is to be understood that one PDCCH is scrambled by one RNTI and a Cyclic Redundancy Check (CRC) indicating DCI carried by the PDCCH is scrambled by the RNTI.

Optionally, the DCI format scrambled by the P-RNTI sent by the network device in the red map initial downlink BWP is the same as the DCI format scrambled by the P-RNTI sent by the network device in the Legacy initial downlink BWP.

DCI scrambled by P-RNTI is called paging DCI, and the paging DCI comprises a short message indication field and a short message field. The short message field is used for carrying short message type information. The corresponding relationship between the bit field of the short message indication field and the meaning of the short message indication field according to the current third generation partnership project (3 gpp) protocol is shown in table 1 below.

TABLE 1

Bit field	Meaning of short message indication field
		00	Retention
01	Scheduling information including PDSCH only in paging DCI
		10	Only short message type information is included in paging DCI
11	The paging DCI comprises short message class information and scheduling information of PDSCH

Several possible scenarios are described below in which the first DCI is not used for scheduling the paging PDSCH.

The first possible scenario is:

the network device is configured or defined in the protocol, so that the short message indication field in the first DCI can only be set to "00" or "10". In this case, the scheduling information of the PDSCH is not included in the first DCI transmitted by the network device. At this time, optionally, the first terminal may also know that the short message indication field in the first DCI can only be set to "00" or "10". If the short message indication field in the first DCI received by the first terminal is set to "11" or "01", the first terminal may regard the first DCI as a false alarm DCI or a DCI transmitted to other UEs, and at this time, the first terminal may ignore the first DCI.

The second possible scenario is:

and configuring the network equipment or specifying in a protocol, wherein the first DCI comprises a first bit field, and the first bit field is set to a first preset value or reserved. The first bit field is a bit field except for a short message indication field and a short message field in the first DCI.

As an example, the first bit fields are all set to 1. As another example, the first bit fields are all set to 0. That is, the first preset value is all 1 s or all 0 s.

It is understood that the first bit field includes, but is not limited to, one or more of the following:

frequency Domain Resource Allocation (FDRA) indication field, time Domain Resource Allocation (TDRA) indication field, virtual resource block-to-physical resource block mapping (VRB-to-PRB mapping) indication field, modulation and coding scheme (modulation and coding scheme) indication field, transmission block scaling factor (TB scaling) indication field, and reserved information bits.

In this case, since the first bit field is set to the first preset value or is reserved, scheduling information of the PDSCH is not actually included in the first paging message. That is, the first terminal cannot acquire the scheduling information of the PDSCH from the first DCI. At this time, the short message indication field in the first DCI may be set to only "00" or "10", as shown in table 1; alternatively, the short message indication field in the first DCI may also be set to "01" or "11", but at this time, "01" or "11" no longer indicates the functions shown in table 1, and these two states (i.e., "01" or "11") may be set to a reserved state, or indicate other functions.

A third possible scenario:

and configuring the network equipment or specifying in a protocol, wherein the first DCI comprises a first bit field, and the first bit field is set to a first preset value or reserved. The first bit field is a bit field other than the short message field in the first DCI.

That is, at this time, the first bit field also includes a short message indication field, and the short message indication field may also be set to the first preset value or be reserved.

A fourth possible scenario:

the format of the short message indication field in the first DCI is not limited, that is, the short message indication field may be set to any one of "00", "01", "10" and "11", but the first terminal acquires only the short message field in the first DCI. That is, if the short message indication field is set to "10", it indicates that there is short message class information, the first terminal acquires only the short message field in the first DCI and ignores the other information fields, otherwise, if the short message indication field is set to any one of "00", "01", or "11", the first terminal ignores the DCI. For example, if the short message indication field is set to "11", the UE acquires only the short message field in the first DCI, ignores the scheduling information of the PDSCH in the first DCI, i.e., the UE does not receive or decode the paging PDSCH. For example, if the short message indication field is set to "01", this indicates that there is no short message, i.e., no SI update/PWS notification occurs, and at this time, the UE also ignores the scheduling information of the PDSCH in the first DCI, i.e., the UE does not receive and does not decode the paging PDSCH.

As a network device, the network device may not transmit a paging PDSCH even if the first DCI includes scheduling information of the PDSCH.

Optionally, if the first DCI includes scheduling information of a PDSCH, the network device may also transmit a paging PDSCH, which may be a PDSCH transmitted to other terminals.

Fig. 3 is a schematic diagram of a communication method 300 according to an embodiment of the present application. The method 300 includes the steps of:

s301, the network device sends first configuration information to the first terminal, where the first configuration information is used to configure an RA search space set in the first BWP, and the RA search space set is used for the first terminal to perform RA in the first BWP, and the first BWP does not include a paging search space set. Accordingly, the first terminal receives the first configuration information.

In addition, the first configuration information is also used to configure a paging search space set within the second BWP.

It should be understood that the first terminal monitors the paging PDCCH in the set of paging search spaces configured within the second BWP before performing RA. For example, the second BWP is Legacy initial downlink BWP, and in an RRC idle (idle) state or an RRC inactive state, the UE monitors a paging PDCCH in the second BWP when not performing RA to monitor whether the first terminal is paged.

When the first terminal is paged, the first terminal performs RF handover, switches to a first BWP, and performs RA in an RA search space set configured within the first BWP.

It should be understood that the first terminal performing RA at the first BWP may also be that the first terminal has data to send to the network device, and thus the first terminal autonomously performs the RA procedure.

S302, in the process that the first terminal executes RA in the RA search space set, the network device sends the short message type information to the first terminal in the first BWP. Accordingly, the first terminal receives the short message class information.

For a more clear description of the scheme of the present application, a brief introduction of the existing RA procedure is first made. The existing RA procedure comprises 4 steps RA and 2 steps RA, wherein the 4 steps RA comprises the following steps.

Step 1: the first terminal sends a message1 (message 1, msg 1). Accordingly, the network device receives message 1.

Step 2: and the first terminal monitors the PDCCH scrambled by the random access radio network temporary identifier RA-RNTI in the RA search space set.

And step 3: and the network equipment transmits DCI # A in the PDCCH scrambled by the RA-RNTI, wherein the DCI # A comprises first scheduling information of the PDSCH. Accordingly, the first terminal receives DCI # a.

And 4, step 4: the network device sends a message2 (Msg 2) on the PDSCH scheduled by the PDCCH scrambled by the RA-RNTI, wherein the message2 includes a Random Access Response (RAR) of the first terminal. The RAR is used to schedule a Physical Uplink Shared Channel (PUSCH). Accordingly, the first terminal receives message 2.

And 5: the first terminal sends a message3 (message 3, msg 3) on the RAR scheduled PUSCH. Accordingly, the network device receives message 3.

Step 6: and the first terminal monitors the PDCCH scrambled by the temporary cell radio network temporary identifier TC-RNTI in the RA search space set.

And 7: the network equipment transmits DCI # B on the TC-RNTI scrambled PDCCH, and accordingly, the first terminal receives the DCI # B.

As one case, the second scheduling information of the PDSCH is included in the DCI # B.

As another case, the DCI # B includes information of the scheduling retransmission message 3.

And 8: the network equipment sends a message4 (message 4, msg 4) on the PDSCH scheduled by the PDCCH scrambled by the TC-RNTI, wherein the message4 comprises a contention resolution identity of the first terminal. Accordingly, the first terminal receives message 4.

Several possible scenarios involved in the network device sending the short message class information to the first terminal at the first BWP during the RA performed by the first terminal in the RA search space set are described below.

The first possible scenario:

the network equipment sends short message type information to a first terminal in a first BWP, the short message type information is carried in a first PDSCH, and the first PDSCH is scheduled by a PDCCH scrambled by an RA-RNTI. Accordingly, the first terminal receives the short message class information.

As an example, short message class information may be carried in message 2.

Optionally, the short message type information notification carried in the Msg2 PDSCH is a common message, and only one piece of indication information needs to be included in one PDSCH, and all UEs receiving the Msg2 PDSCH can obtain the indication information. For example, 2 bits are included in the Msg2 PDSCH, where one bit is used to indicate whether SI update occurs and the other bit is used to indicate whether PWS notification exists.

The second possible scenario:

the network equipment sends short message type information to a first terminal at a first BWP, the short message type information is carried in a second PDCCH, the second PDCCH is scrambled through RA-RNTI, and the short message type information comprises public warning system PWS notification information. Accordingly, the first terminal receives the short message class information.

Optionally, in this case, the short message class information may further include SI update information.

Optionally, an information field may be added in the DCI scrambled by the RA-RNTI or a partial reservation information field may be used for carrying the short message class information.

As an example, short message class information may be carried in DCI # a.

A third possible scenario:

and the network equipment sends the short message type information to the first terminal at the first BWP, wherein the short message type information is carried in a third PDCCH, and the third PDCCH is scrambled by TC-RNTI. Accordingly, the first terminal receives the short message class information.

Optionally, an information field may be added in the DCI scrambled by the TC-RNTI or a partial reserved information field may be used for carrying the short message class information.

As an example, short message class information may be carried in DCI # B. The formats of DCI # B include DCI format 1 _u0 and DCI format 0 _u0.

According to an aspect of the present application, the network device may send short message class information to the first terminal at the first BWP in a process in which the first terminal performs RA in an RA search space set within the first BWP. Therefore, when the first terminal performs RA within the first BWP, it is not necessary to perform RF handover in order to acquire the short message class information. That is, the first terminal does not need to switch to the second BWP to monitor the paging PDCCH in the paging search space set of the second BWP in order to acquire the short message type information. Therefore, by adopting the scheme of the application, the power consumption of the first terminal can be effectively reduced, and the complexity of the first terminal is reduced.

The UE has a paging Discontinuous Reception (DRX) cycle in a Radio Resource Control (RRC) idle (idle)/inactive (active) state, and monitors a paging PDCCH at a corresponding Paging Occasion (PO) in each paging DRX cycle.

The paging DRX cycle is generally long, for example, 1.28 seconds, and the UE generally performs measurement, for example, time-frequency tracking (or time-frequency synchronization), automatic Gain Control (AGC), and/or beam selection (beam selection), before waking up to monitor the paging PDCCH after a long sleep. The UE generally implements time-frequency tracking, AGC adjustment, and/or beam selection in an RRC idle/inactive state by receiving a synchronization signal block (SS/PBCH block, SSB).

Configuring monitoring paging for the RedCap UE at the initial downlink BWP of the RedCap:

the advantages are that: the paging capacity is increased. And the RedCap UE monitors paging in the RedCap initial downlink BWP, and the Normal UE monitors paging in the Legacy initial downlink BWP, so that load balance is realized, and the capacity is enlarged.

The disadvantages are that:

if the frequency domain range of the red initial downlink BWP does not include the SSB, the UE receives a cell-defining SSB (CD-SSB) to perform time-frequency synchronization, AGC adjustment, and/or beam selection before monitoring the paging PDCCH, and then switches to the red initial downlink BWP to monitor the paging PDCCH, which may increase UE power consumption.

Since there is a certain probability of whether the UE is paged, there may be the following: the paging message of Normal UE in Legacy BWP and the paging message of red map UE in red map BWP can be accommodated by one paging PDSCH, but the network device needs to transmit paging PDCCH and paging PDSCH in two BWPs separately. It can be seen that sending paging messages for Normal UE and red map UE separately at two BWPs increases the paging resource overhead. It should be understood that herein, two BWPs refer to a red map initial downstream BWP and a Legacy initial downstream BWP.

Configuring the listening paging for the RedCap UE at Legacy initial downlink BWP:

the advantages are that: the RedCap UE does not need to RF switch between the CD-SSB and the monitoring paging PDCCH. Nor does it need to configure the reccap UE with additional SSBs for measurement outside the CD-SSBs.

The disadvantages are as follows: there is a problem that the paging capacity is not sufficient.

As can be seen from the above, there is a disadvantage in configuring the listening page to the rectap UE either at the initial downlink BWP of the rectap or the Legacy initial downlink BWP. Based on this, the present application proposes a method 400 for solving the above-mentioned problems.

Fig. 4 is a schematic diagram of a communication method 400 according to an embodiment of the present application. The method 400 includes the steps of:

s410, the network device sends first configuration information to the first terminal, the first configuration information is used for configuring paging search space sets in the first BWP and the second BWP, and the paging search space sets are used for the first terminal to monitor a paging PDCCH so as to monitor short message type information or monitor whether the first terminal is paged. Accordingly, the first terminal receives the first configuration information.

Optionally, as a case, the configuration of the first BWP intra-page search space set is the same as the configuration of the second BWP intra-page search space set. Specifically, reference may be made to the description in S201.

Optionally, as another case, the configuration of the first BWP intra-page search space set is different from the configuration of the second BWP intra-page search space set. Specifically, reference may be made to the description in S201.

In addition, the first configuration information is also used for configuring paging occasions PO within the first BWP and within the second BWP.

S420, the network device sends first indication information, where the first indication information is used to indicate that the first terminal monitors one BWP of the paging PDCCH from the first BWP and the second BWP. Accordingly, the first terminal receives the first indication information.

In addition, optionally, the first indication information is further used to indicate whether the first terminal monitors the paging PDCCH.

For example, the first indication information may be a Paging Early Indication (PEI).

S430, the first terminal monitors the paging PDCCH at a BWP indicated by the first indication information.

As one case, when the first indication information indicates that the first terminal monitors the paging PDCCH, the first terminal monitors the paging PDCCH at one BWP indicated by the first indication information.

For example, the first indication information indicates that the first terminal monitors the paging PDCCH in the first BWP, and the first terminal monitors the paging PDCCH in the paging search space set in the first BWP.

For yet another example, the first indication information indicates that the first terminal monitors the paging PDCCH at the second BWP, and the first terminal monitors the paging PDCCH at the paging search space set within the second BWP.

As another case, when the first indication information indicates that the first terminal does not monitor the paging PDCCH, the first terminal does not monitor the paging PDCCH. That is, the information in the first indication information indicating in which BWP the first terminal monitors the paging PDCCH may be valid only if the first indication information indicates that the first terminal monitors the paging PDCCH.

Optionally, when the first indication information indicates that the first terminal does not monitor the paging PDCCH, information in the first indication information indicating in which BWP the first terminal monitors the paging PDCCH is reserved or set to a specific value, for example, set to all 0 s or all 1 s, or used to indicate other functions.

According to the scheme of the application, the network device may configure a paging search space set for the first terminal within the first BWP and the second BWP, and instruct the first terminal to monitor a paging PDCCH at the first BWP or the second BWP through the first indication information, thereby implementing dynamic paging load balancing. For example, the network device configures the first terminal to listen to the first indication information in the second BWP (e.g., legacy initial downlink BWP), and only when the paging capacity in the second BWP is insufficient, the first terminal switches to the first BWP (e.g., paging initial downlink BWP) to listen to the paging (paging) PDCCH, which may reduce RF handover of the UE and reduce paging resource overhead.

Optionally, before S420, the method 400 further includes S411:

s411, the network device sends second indication information, and the second indication information indicates that the first terminal listens to the first indication information in the second BWP. Accordingly, the first terminal receives the second indication information.

Optionally, the first terminal may be configured or specified in a protocol, so that the first terminal listens for the first indication information at the second BWP.

S412, the network device sends the second configuration information to the second terminal. Accordingly, the second terminal receives the second configuration information.

The second configuration information is used to configure the paging search space set within the second BWP and to configure the PO within the second BWP.

In the case that the method 400 includes S412, the second indication information is further used to indicate that the second terminal monitors the first indication information at the second BWP, and the first indication information is further used to indicate whether the second terminal monitors the paging PDCCH.

That is, the first terminal and the second terminal listen for the same first indication information.

It should be understood that if the first indication information indicates that the second terminal monitors the paging PDCCH, the second terminal monitors the paging PDCCH in the paging search space set in the second BWP.

Optionally, the first indication information may further indicate that a part of the second class terminals listen to the paging PDCCH to the first BWP. For example, when there are more second-class terminal devices on the second BWP, the network device may instruct some of the second-class terminals to listen to the paging PDCCH to the first BWP for load balancing.

Optionally, the first configuration information includes second configuration information. For example, the first configuration information and the second configuration information are carried in the same message, for example, in SIB1, and both the first terminal and the second terminal can receive the first configuration information and the second configuration information.

Further optionally, as a first possible scenario, the first configuration information is further used for configuring, for the first terminal, a set of RA search spaces within the first BWP, the set of RA search spaces being used for the first terminal to perform RA within the first BWP.

In this case, the method 400 further includes:

s440, the network device sends a fourth DCI to the first terminal in the paging search space set configured in the first BWP, where the fourth DCI includes the short message type information. Accordingly, the first terminal receives the fourth DCI.

In this first possible scenario, how the first terminal performs RA is described below.

The first terminal listens for the first indication information at the second BWP.

When the first indication information indicates that the first terminal monitors the paging PDCCH in the paging search space set in the first BWP, the first terminal monitors the paging PDCCH in the paging search space set in the first BWP. If the first terminal is paged, the first terminal performs RA in a RA search space set within the first BWP. When the first terminal performs RA in the RA search space set within the first BWP, the first terminal may continue to monitor the paging PDCCH in the paging search space set within the first BWP, so that the short message class information may be acquired from the fourth DCI. If the first terminal is not paged, the first terminal goes back to the second BWP to listen for the next first indication information.

When the first indication information indicates that the first terminal monitors the paging PDCCH in the paging search space set in the second BWP, the first terminal monitors the paging PDCCH in the paging search space set in the second BWP. The first terminal performs an RF handover if the first terminal is paged, and performs RA in an RA search space set within a first BWP. When the first terminal performs RA in the RA search space set within the first BWP, the first terminal may continue to monitor the paging PDCCH in the paging search space set within the first BWP, so that the short message class information may be acquired from the fourth DCI. If the first terminal is not paged, the first terminal continues to listen for the next first indication information at the second BWP.

Optionally, as a second possible scenario, the first configuration information is further used for configuring a set of RA search spaces within a second BWP for the first terminal.

In this case, the method 400 further includes:

s450, the network device sends a fifth DCI to the first terminal in the paging search space set configured in the second BWP, where the fifth DCI includes the short message type information. Accordingly, the first terminal receives the fifth DCI.

In this second possible scenario, how the first terminal performs RA is described below.

When the first indication information indicates that the first terminal monitors the paging PDCCH in the paging search space set in the first BWP, the first terminal monitors the paging PDCCH in the paging search space set in the first BWP. The first terminal performs an RF handover if the first terminal is paged, and the first terminal performs an RA in an RA search space set within a second BWP. When the first terminal performs RA in the RA search space set within the second BWP, the first terminal may continue to listen to the paging PDCCH in the paging search space set within the second BWP, so that the short message class information may be acquired from the fifth DCI. If the first terminal is not paged, the first terminal goes back to the second BWP to listen for the next first indication information.

When the first indication information indicates that the first terminal monitors the paging PDCCH in the paging search space set in the second BWP, the first terminal monitors the paging PDCCH in the paging search space set in the second BWP. The first terminal performs RA in a RA search space set within a second BWP if the first terminal is paged. When the first terminal performs RA in the RA search space set within the second BWP, the first terminal may continue to monitor the paging PDCCH in the paging search space set within the second BWP, so that the short message class information may be acquired from the fifth DCI. If the first terminal is not paged, the first terminal continues to listen for the next first indication information in the second BWP.

The first indication information transmitted by the network device will be described in detail next. The first indication information is exemplified by PEI as follows.

As a first possible scenario, PEI is only targeted for a first class of terminals. The PEI indicates whether the first type terminal monitors the paging PDCCH, and indicates to the first type terminal one BWP that monitors the paging PDCCH from among the first BWP and the second BWP.

As a second possible scenario, PEI is targeted at terminals of the first type and terminals of the second type. The PEI indicates whether the first type terminal and the second type terminal monitor the paging PDCCH and indicates to the first type terminal one BWP monitoring the paging PDCCH from the first BWP and the second BWP. It should be understood that the first terminal described above belongs to a first class of terminal and the second terminal described above belongs to a second class of terminal.

Optionally, if the PEI indicates that the first terminal monitors the paging PDCCH in the first BWP, the first terminal monitors the paging PDCCH in the first BWP in the PO belonging to the first terminal;

if the PEI indicates that the first terminal monitors the paging PDCCH in the second BWP, the first terminal monitors the paging PDCCH in the second BWP by PO belonging to the first terminal;

and if the PEI indicates that the second terminal monitors the paging PDCCH, the second terminal monitors the paging PDCCH in a PO belonging to the second terminal in a second BWP.

For example, the first BWP represents a redmap initial downstream BWP, and the second BWP represents a Legacy initial downstream BWP.

From the Legacy initial downlink BWP perspective, one PEI is associated with 1 or more POs, and the PEI is used to indicate whether the UE on the PO associated with the PEI listens to the paging PDCCH. Corresponding to the RedCap UE, the PEI is used to indicate at which BWP the RedCap UE on the PO associated with the PEI listens for the paging PDCCH.

From the perspective of two BWPs, namely Legacy initial downlink BWP and red cp initial downlink BWP, one PEI associates POs on the two BWPs, that is, associates 1 or more POs on the Legacy initial downlink BWP and 1 or more POs on the red cp initial downlink BWP, and the PEI is used to indicate whether the UE on the PO associated with the PEI listens to the paging PDCCH. Corresponding to the RedCap UE, the PEI is used to indicate at which BWP the RedCap UE on the PO associated with the PEI listens for the paging PDCCH.

Which POs the PEI is specifically associated with may be predefined by the network device configuration or protocol. For example, PEI is associated with all POs included in one paging frame.

Optionally, if the PEI indicates the UE to monitor the paging PDCCH, the UE only monitors the paging PDCCH on the PO belonging to the UE in the POs associated with the PEI.

Optionally, the UE only monitors PEI resources associated with its PO.

In a second possible scenario, the PEI indicates whether the first type terminal and the second type terminal monitor the paging PDCCH, and indicates to the first type terminal one BWP that monitors the paging PDCCH from the first BWP and the second BWP, in the following two ways.

Mode 1:

the PEI comprises a first bit field and a second bit field, the first bit field indicates whether the first type terminal and the second type terminal monitor the paging message, and the second bit field is used for indicating the first type terminal to monitor a BWP of the paging PDCCH from the first BWP and the second BWP.

Mode 2:

the PEI comprises a third bit field which indicates whether the first type terminal and the second type terminal monitor the paging PDCCH or not and indicates a BWP monitoring the paging PDCCH from the first BWP and the second BWP to the first type terminal.

Mode 1 and mode 2 will be described in detail below.

First, the above-described mode 1 will be described, and the above-described mode 1 includes the following 3 cases.

Case 1:

the configuration of the PO within the first BWP is the same as the configuration of the PO within the second BWP.

Assume that PEI associates N POs within a second BWP, N being a positive integer. It should be understood that PEI also associates N POs within the first BWP.

In the N POs respectively associated with the two BWPs, for a reccap UE, if in Legacy initial downlink BWP, the PO belonging to the reccap UE is the xth _ i of the N POs associated with the PEI in Legacy initial downlink BWP, then the own PO of the reccap UE in Legacy initial downlink BWP is also the xth _ i of the N POs associated with the PEI in Legacy initial downlink BWP. It can be considered that "the xth _ i of N POs associated by PEI in Legacy initial downstream BWP" and "the xth _ i of N POs associated by PEI in reicpap initial downstream BWP" are associated POs, or they are POs with mapping relationship. In this case, it can also be said that one PEI associates 2N POs in two BWPs.

In case 1, the first bit field indicates whether the first class of terminals and the second class of terminals monitor the paging PDCCH or not includes the following possible scenarios.

The first possible scenario:

for the ith PO of the N POs associated by the PEI in the second BWP, the first bit field comprises a bit i, and the bit i is used for indicating whether all terminals on the ith PO monitor the paging PDCCH.

It should be understood that all terminals do not distinguish between terminals of the first type and terminals of the second type. The following description is omitted for all terminals.

The second possible scenario:

for the ith PO, the first bit field includes a bit i1 and a bit i2, the bit i1 is used for indicating whether all the first class terminals on the ith PO monitor the paging PDCCH, and the bit i2 is used for indicating whether all the second class terminals on the ith PO monitor the paging PDCCH.

A third possible scenario:

for the ith PO, all the first class terminals on the ith PO are divided into x groups, all the second class terminals on the ith PO are divided into y groups, the first bit field comprises bits i1 to ix and bits i (x + 1) to i (x + y), the bits i1 to ix correspond to the x groups of terminals one by one, the bits i (x + 1) to i (x + y) correspond to the y groups of terminals one by one, each bit of the bits i1 to ix and the bits i (x + 1) to i (x + y) is used for indicating whether the corresponding group of terminals monitors the paging PDCCH, and x and y are positive integers.

In this case, the number of bits in the first bit field corresponding to a total of (x + y) terminal groups on the ith PO is (x + y).

Optionally, the number of bits in the first bit field corresponding to a total of (x + y) terminal groups on the ith PO may be smaller than (x + y), so as to save signaling overhead. For example, whether (x + y) terminal groups monitor the paging PDCCH is indicated by M bits. For example, x =2,y =2,m =3,3 bits total includes 8 states, of which 6 states are used to indicate: the 1 st group of terminals in the (x + y) terminal groups monitor a paging PDCCH, and other terminal groups are not paged; the 2 nd group of terminals in the (x + y) terminal group monitors a paging PDCCH, and other terminal groups are not paged; the 3rd group of terminals in the (x + y) terminal group monitors a paging PDCCH, and other terminal groups are not paged; the 4 th group of terminals in the (x + y) terminal group monitors the paging PDCCH, and other terminal groups are not paged; monitoring paging PDCCH by (x + y) terminal groups; none of the (x + y) terminal groups monitors the paging PDCCH.

A fourth possible scenario:

for the ith PO, all terminals on the ith PO are divided into j groups, at least one group of terminals in the j groups of terminals comprises at least one first-class terminal and at least one second-class terminal, a first bit field comprises bits i1 to ij, the bits i1 to ij correspond to the j groups of terminals one by one, each bit in the bits i1 to ij is used for indicating whether the corresponding group of terminals monitors the paging PDCCH, and j is a positive integer. At this time, when all the terminals are divided into j groups, the first type terminal and the second type terminal are not distinguished.

In this case, the number of bits in the first bit field corresponding to j terminal groups on the ith PO is j.

Similar to the above, optionally, the number of bits in the first bit field corresponding to j terminal groups on the ith PO may be smaller than j, so as to save signaling overhead. For specific examples, reference is made to the above description, which is not repeated.

It is to be understood that in the four possible cases described above, i is a positive integer less than or equal to N.

In case 1, the second bit field is used to indicate one BWP from among the first BWP and the second BWP to listen for the paging PDCCH to the first class of terminals, including the following several possible scenarios.

The first possible scenario is:

for the kth PO of the N POs associated by the PEI in the second BWP, the second bit field comprises a bit k, the bit k is used for indicating all the first-class terminals on the kth PO to monitor one BWP of the paging PDCCH, and k is a positive integer less than or equal to N.

The second possible scenario:

suppose that PEI associates M PFs at a second BWP, M being a positive integer.

For the mth PF among the M PFs, the second bit field includes a bit M, where the bit M is used to indicate all the first type terminals on all POs included in the mth PF to monitor one BWP of the paging PDCCH, and M is a positive integer smaller than or equal to M.

A third possible scenario:

the second bit field includes 1 bit for instructing all the first type terminals on all POs associated with the PEI to listen for one BWP paging the PDCCH.

Case 2:

the partial configuration of the PO in the first BWP is the same as the partial configuration of the PO in the second BWP, the partial configuration includes the ratio of paging frames in the radio frame and the paging frame offset, and the number of paging occasions included in each paging frame in the first BWP is different from the number of paging occasions included in each paging frame in the second BWP.

At this time, since the paging frame offsets (PF _ offsets) of the two BWPs remain the same, the paging frames of the two BWPs are temporally aligned.

At this time, since the number of POs included in each paging frame in the two BWPs is different, the PO time domain positions calculated in the two BWPs may be different for the same redmap UE.

For example, the calculation formula for the red map UE to determine its PO in two BWPs may refer to the existing protocol.

Example 1, each paging frame in the first BWP includes a number of paging occasions equal to 4, each paging frame in the second BWP includes a number of paging occasions equal to 2, and for the same paging frame, at the initial downlink BWP of the redcp, the paging frame includes sPO1, sPO2, sPO3, and sPO4, at the initial downlink BWP of the Legacy, the paging frame includes PO1 and PO2, and if PO of the UE1 calculated at the initial downlink BWP of the redcp is sPO1 and PO of the UE3 calculated at the initial downlink BWP of the redcp is sPO3, then in the initial downlink BWP of the Legacy, PO of the UE1 and PO of the UE3 calculated are both PO1; if the PO calculated by the UE2 in the initial downlink BWP of the RedCap is sPO2 and the PO calculated by the UE4 in the initial downlink BWP of the RedCap is sPO4, the POs calculated by the UE2 and the PO calculated by the UE4 are both PO2 in the initial downlink BWP of Legacy.

It should be understood that, at this time, UE1 may be referred to as a red map UE on sPO1, and may also be referred to as a red map UE on PO1; UE3 may be referred to as a recmap UE on sPO3, and may also be referred to as a recmap UE on PO1; UE2 and UE4 are similar.

Example 2, each paging frame in the first BWP includes a number of paging occasions equal to 2, each paging frame in the second BWP includes a number of paging occasions equal to 4, and for the same paging frame, at the initial downlink BWP of redcp, the paging frame includes sPO1 and sPO2, at the initial downlink BWP of Legacy, the paging frame includes PO1, PO2, PO3 and PO4, and if PO of UE1 calculated at the initial downlink BWP of Legacy is PO1, PO of UE3 calculated at the initial downlink BWP of Legacy is PO3, then in the initial downlink BWP of redcp, both PO of UE1 and PO of UE3 calculated at the initial downlink BWP of Legacy are sPO1; if the PO calculated by the UE2 in Legacy initial downlink BWP is PO2, and the PO calculated by the UE4 in Legacy initial downlink BWP is PO4, then in the red map initial downlink BWP, the POs calculated by the UE2 and the PO calculated by the UE4 are sPO2.

It should be understood that, at this time, UE1 may be referred to as a reccap UE on PO1, and may also be referred to as a reccap UE on sPO1; UE3 may be referred to as a recap UE on PO3, and may also be referred to as a recap UE on sPO1; UE2 and UE4 are similar.

sPO as above represents seperate PO.

At this time, optionally, the number of POs associated with PEI in the first BWP is different from the number of POs associated with PEI in the second BWP.

Assume that the number of POs associated with PEI at a first BWP is a first number (denoted as H) and the number of POs associated with a second BWP is a second number (denoted as N). H and N are positive integers.

In one example, the first bit field includes a number of bits associated with the second value. At this time, reference may be made to the case 1 above, where the first bit field indicates whether the first class terminal and the second class terminal monitor 4 possible situations included in the paging PDCCH. For brevity, no further description is provided herein.

For yet another example, the first bit field includes a number of bits associated with the first value and the second value. At this time, optionally, refer to the 4 possible situations that the first bit field indicates whether the first class terminal and the second class terminal monitor the paging PDCCH in case 1. The difference is that for a PO associated with PEI in the second BWP, PEI indicates whether the second class of terminals on the PO listen to the paging PDCCH, and for a PO associated with PEI in the first BWP, PEI indicates whether the first class of terminals on the PO listen to the paging PDCCH. The following examples are given.

For example, the first bit field indicates whether the first class of terminals and the second class of terminals monitor the paging PDCCH, including the following possible scenarios.

The first possible scenario:

the first bit field includes N bits and H bits, where N + H bits correspond one-to-one to N + H POs associated with the PEI in two BWPs. The nth bit of the N bits is used to indicate whether all the second class terminals on the nth PO of the N POs monitor the paging PDCCH. The H-th bit of the H bits is used to indicate whether all the first class terminals on the H-th PO of the H POs monitor the paging PDCCH. N is a positive integer less than N, and H is a positive integer less than H.

The second possible scenario:

all the second class terminals on the nth PO of the N POs are divided into N1 subgroups, and all the first class terminals on the H PO of the H POs are divided into H1 subgroups.

For the nth and the h PO, the first bit field includes n1 bits and h1 bits, the n1 bits correspond to the n1 subgroups one by one, and the h1 bits correspond to the h1 subgroups one by one. Each bit in the n1 bits is used for indicating whether the second class terminals in the corresponding subgroup monitor the paging messages, and each bit in the h1 bits is used for indicating whether the first class terminals in the corresponding subgroup monitor the paging messages.

In case 2, the second bit field is used to indicate to the first class of terminals one BWP listening to the paging PDCCH from among the first BWP and the second BWP, including the following possible scenarios.

The first possible scenario is:

the second bit field includes a number of bits equal to the second value.

That is, the second bit field includes N bits, which are associated with the PEI in a one-to-one correspondence with N POs in the second BWP. An nth bit of the N bits is used to indicate all first class terminals on the nth PO of the N POs to listen to one BWP of the paging PDCCH.

The second possible scenario:

the second bit field comprises a number of bits equal to the first value.

That is, the second bit field includes H bits, and the H bits are associated with the PEI in a one-to-one correspondence with the H POs in the first BWP. The H-th bit of the H bits is used to instruct all the first class terminals on the H-th PO of the H POs to monitor one BWP of the paging PDCCH.

A third possible scenario:

the second bit field includes a number of bits equal to the lesser of the first value and the second value.

That is, the number of bits included in the second bit field is equal to min (N, H). When the value of min (N, H) is N, reference may be made to the first possible scenario described above; when the value of min (N, H) is H, reference may be made to the second possible scenario described above. And will not be described in detail herein.

A fourth possible scenario:

the second bit field comprises a number of bits equal to the greater of the first value and the second value.

That is, the number of bits included in the second bit field is equal to max (N, H). When max (N, H) takes the value N, reference may be made to the first possible scenario described above; when max (N, H) takes the value H, reference may be made to the second possible scenario described above. And will not be described in detail herein.

A fifth possible scenario:

the second bit field includes a number of bits equal to a third value, the third value being the number of PFs associated by the PEI in the second BWP. It should be appreciated that the number of PFs associated by PEI in the second BWP is equal to the number of PFs associated by PEI in the first BWP.

Assuming that PEI associates W PFs, the second bit field includes W bits, and the W bits correspond to the W PFs associated with PEI one to one. The W-th bit of the W bits is used to indicate that all the first-class terminals on all POs included in the W-th PF of the W PFs monitor one BWP of the paging PDCCH.

A sixth possible scenario:

the second bit field includes 1 bit for instructing all the first type terminals on all POs associated with the PEI to listen to one BWP of the paging PDCCH.

Specifically, the first bit field and the second bit field may be configured by the network device or predefined by the protocol.

Case 3:

the configuration of the PO within the first BWP is different from the configuration of the PO within the second BWP. Specifically, the proportion of paging frames in a radio frame and/or the paging frame offset are different. Alternatively, the number of paging occasions may be the same or different.

As a possibility, one radio frame is PF at the first BWP, but not PF at the second BWP. As another possibility, one radio frame is not PF at the first BWP, but is PF at the second BWP.

When PEI is not associated with the POs in the first BWP, PEI only indicates whether the second class of terminals listens to the paging PDCCH or not.

That is, when the PEI is associated with a PO in the second BWP, only the second class of terminals listens to the PEI.

When PEI is not associated with POs within the second BWP, PEI only indicates whether the first class of terminals listens to the paging PDCCH or not.

That is, when the PEI is associated with a PO in the first BWP, only the first class of terminals listens to the PEI.

Optionally, the first class terminal still monitors PEI in the second BWP, that is, the PEI resource is still located in the second BWP, and if the PEI instructs the first class terminal to monitor the paging PDCCH, the woken first class terminal defaults to monitor the paging PDCCH in the corresponding PO in the first BWP.

It should be understood that in this case 3, if the PEI is only associated with a PO on one of the BWPs, the second bit field included in the PEI is not active, or is reserved, or is set to a particular value, or is used to indicate other functions.

It should be understood that, when a wireless frame is PF in both the first BWP and the second BWP, if the PEI is associated with POs in both BWPs, refer to the above case 1 or case 2, and no further description is given.

Next, mode 2 will be explained.

In the embodiment 2, the arrangement of the POs in the first BWP and the arrangement of the POs in the second BWP may be the same or different. The third bit field indicates whether the first class terminal and the second class terminal monitor the paging PDCCH, and indicates to the first class terminal one BWP that monitors the paging PDCCH from among the first BWP and the second BWP, including the following possible scenarios. Assume that PEI associates N POs in a second BWP, N being a positive integer.

The first possible scenario:

for the nth PO of the N POs, the third bit field includes 3 bits, denoted as bit # N1, bit # N2, bit # N3. Wherein the bit # n1 indicates whether the second class of terminals on the nth PO monitor the paging PDCCH. The bit # n2 and the bit # n3 jointly indicate whether the first class terminal on the nth PO listens to the paging PDCCH, and indicate to the first class terminal one BWP that listens to the paging PDCCH from among the first BWP and the second BWP. N is a positive integer less than N.

For an example, the correspondence between the bit states of the bit # n2 and the bit # n3 and the corresponding meanings is shown in table 2 below.

TABLE 2

Optionally, the third bit field includes a bit # n2, a bit # n3 and P bits, wherein the implementation of the bit # n2 and the bit # n3 is still as shown in table 2. P bits are used to indicate whether V subgroups into which the second class terminal on the nth PO is divided monitor the paging PDCCH, for example, P = V, the P bits are in one-to-one correspondence with the V subgroups into which the second class terminal on the nth PO is divided, and any bit of the P bits is used to indicate whether the corresponding subgroup monitors the paging PDCCH.

The second possible scenario:

for the nth PO of the N POs, the third bit field includes 2 bits, denoted as bit # N1, bit # N2.

The bit # n1 and the bit # n2 jointly indicate whether the first class terminal and the second class terminal on the nth PO listen to the paging PDCCH, and indicate one BWP to the first class terminal to listen to the paging PDCCH from among the first BWP and the second BWP.

For an example, the correspondence between the bit states of the bit # n1 and the bit # n2 and the corresponding meanings is shown in table 3 below.

TABLE 3

A third possible scenario:

For an example, the correspondence between the bit states of the bit # n1 and the bit # n2 and the corresponding meanings is shown in table 4 below.

TABLE 4

Table 4 is additionally described below.

As a possible approach, all terminals on the nth PO are also divided into Y subgroups. For the nth PO, the third bit field further includes Y bits, and the Y bits are in one-to-one correspondence with the Y subgroups. Y is a positive integer.

When the bit state of the bit # n1 and the bit # n2 is "01", the Y-th bit of the Y bits is used to indicate whether the first class of terminals in the Y-th sub-group monitors the paging PDCCH. Y is a positive integer of Y or less.

When the bit status of the bit # n1 and the bit # n2 is "10", the Y-th bit of the Y bits is used to indicate whether the second type terminal in the Y-th sub-group monitors the paging PDCCH.

When the bit state of the bit # n1 and the bit # n2 is "11", the Y-th bit of the Y bits is used to indicate whether the first class terminal and the second class terminal in the Y-th sub-group monitor the paging PDCCH. In case the number of subgroups instructed to monitor the paging PDCCH is larger than the first threshold, the bit state "11" may also implicitly instruct the second class of terminals on the nth PO to monitor the paging PDCCH at the second BWP and the first class of terminals on the nth PO to monitor the paging PDCCH at the first BWP. In case the number of subgroups instructed to monitor the paging PDCCH is less than or equal to the first threshold, the bit state "11" may also implicitly indicate that both the second type of terminals on the nth PO and the first type of terminals are monitoring the paging PDCCH at the second BWP.

As another possibility, the first type of terminals on the nth PO are divided into Q subgroups and the second type of terminals on the nth PO are divided into T subgroups. And the third bit field also comprises Q + T bits, and the Q + T bits correspond to the Q + T subgroups one by one. Q and T are positive integers.

When the bit state of the bit # n1 and the bit # n2 is "01", the qth bit of the Q bits is used to indicate whether the first class terminal in the qth sub-group of the Q sub-groups monitors the paging PDCCH. Q is a positive integer of Q or less.

When the bit state of the bit # n1 and the bit # n2 is "10", a T-th bit of the T bits is used to indicate whether the second class of terminals in a T-th sub-group of the T sub-groups monitors the paging PDCCH. T is a positive integer less than or equal to T.

When the bit state of the bit # n1 and the bit # n2 is "11", the qth bit of the Q bits is used to indicate whether the first class of terminals in the qth sub-group of the Q sub-groups monitors the paging PDCCH, and the tth bit of the T bits is used to indicate whether the second class of terminals in the tth sub-group of the T sub-groups monitors the paging PDCCH. In case the number of subgroups instructed to monitor the paging PDCCH (including subgroups of terminals of the first type and subgroups of terminals of the second type) is greater than the first threshold, the bit state "11" may also implicitly instruct the terminals of the second type on the nth PO to monitor the paging PDCCH at the second BWP and the terminals of the first type on the nth PO to monitor the paging PDCCH at the first BWP. In case the number of subgroups instructed to monitor the paging PDCCH (including subgroups of terminals of the first type and subgroups of terminals of the second type) is less than or equal to the first threshold, the bit state "11" may also implicitly instruct both the terminals of the second type and the terminals of the first type on the nth PO to monitor the paging PDCCH at the second BWP.

It is to be understood that the first class of terminals may determine the number of subgroups that are instructed to monitor the paging PDCCH in relation to the first threshold. Also, the first threshold value may be preconfigured in the first class of terminals, or predefined by the protocol.

Optionally, in the present application, the PEI may be carried by the PDCCH.

Optionally, in the present application, the PEI may also be carried by a reference signal sequence, for example, different reference signal sequences represent different indication states. For example, secondary Synchronization Signal (SSS) sequences may carry PEI information.

Optionally, in this application, for a first class of terminals on a PO associated with the PEI, the PEI may instruct a part of the first class of terminals to monitor the paging PDCCH at the second BWP, and instruct another part of the first class of terminals to monitor the paging PDCCH at the first BWP, so that more first class of terminals monitor the paging PDCCH at the second BWP as much as possible while achieving load balancing, thereby reducing the number of RF handovers performed by the UE to save power consumption of the UE.

In one case, the bandwidth supported by the recmap UE is small, and a part of BWP configured for the recmap UE may not include CD-SSB (denoted as the first SSB). For example, as described above, CD-SSB may not be included in the initial downlink BWP of a redmap configured for a redmap UE.

If the RedCap initial downlink BWP does not include a CD-SSB, the UE may still need to receive the SSB for performing time-frequency tracking, beam management, RRM measurement, RLM measurement, and/or CSI measurement when the BWP is active BWP. An RF handover is performed when the rdcap UE receives the SSB, and the UE cannot transmit data on the active BWP during the RF handover, which may cause data interruption, and further, frequent RF handover of the UE may increase UE power consumption.

As a result, SSBs other than CD-SSBs are configured for the rectap UE, for example, SSBs for measurement are configured for the rectap UE within the initial downlink BWP of the rectap.

However, configuring another SSB (denoted as a second SSB) for the RedCap UE besides the CD-SSB increases resource overhead, reduces resource utilization efficiency, and increases network device power consumption. Based on this, the present application proposes a method 500.

Fig. 5 is a schematic diagram of a communication method 500 according to an embodiment of the present application. The second SSB is described below with reference to fig. 5. The method 500 includes the steps of:

s501, the network device sends a first synchronization signal block (SS/PBCH block, SSB) to the first terminal, where the first SSB includes a Physical Broadcast Channel (PBCH), and the PBCH is used to carry information of a Master Information Block (MIB). Accordingly, the first terminal receives the first SSB.

The first SSB is used to determine a first cell to which the first terminal is connected.

As an example, the first SSB is a CD-SSB.

S502, the first terminal determines to connect the first cell according to the first SSB.

It should be understood that the first cell is a cell under the network device.

S503, the network device sends the configuration information of the second SSB to the first terminal in the first cell. Accordingly, the first terminal receives configuration information of the second SSB.

Optionally, in an implementation manner, the first terminal may also receive, in the second cell, configuration information of the second SSB from the network device. For example, after the first terminal connects to the first cell, the network device configures the first terminal with a second cell, and the second cell does not include the first SSB.

In one implementation, the second SSB also belongs to the first cell.

In one implementation, the second SSB belongs to a second cell.

S504, the network device sends a second SSB to the first terminal according to the configuration information of the second SSB, where the second SSB does not include the PBCH, and the second SSB includes at least one Secondary Synchronization Signal (SSS).

Wherein the second SSB is located at the first BWP. For example, the first BWP is the redmap initial downlink BWP.

Optionally, the frequency of the first SSB is different from the frequency of the second SSB, the second SSB has a second period, the first SSB has a first period, and the second period is less than or equal to the first period.

Optionally, the frequency of the second SSB is not located on a synchronization grid (sync grating). Thus, legacy UEs and NR Normal UEs will not search for the second SSB in the sync rat, and will not affect Legacy UEs and Normal UEs.

It should be understood that the frequency of the first SSB is located in the synchronization grid.

It should be understood that the second SSB may also be referred to as an additional synchronization signal block (added-SSB), an SSB that does not include PBCH (SSB without PBCH), a Redcap Synchronization Signal (RSS), or a Redcap Reference Signal (RRS). And is not limited.

And S505, the first terminal measures according to the second SSB.

The measurements made by the first terminal according to the second SSB include, but are not limited to, one or more of the following:

time-frequency tracking (also referred to as time/frequency tracking), automatic Gain Control (AGC), beam management, such as beam selection (beam selection), radio Resource Management (RRM) measurement, radio Link Monitoring (RLM) measurement, channel State Information (CSI) measurement.

According to an aspect of the present application, when the first BWP does not include the first SSB, the second SSB may be configured for the first terminal at the first BWP such that the first terminal may perform measurements. In addition, the PBCH may not be included in the second SSB, thereby reducing power consumption of the network device and saving resource overhead.

The relationship among the time-frequency structure, frequency-domain position, time-domain position, and quasi co-location (QCL) of the second SSB is described in detail below.

First, the time-frequency structure of the second SSB is described. The time-frequency format of the first SSB is shown in fig. 6. As can be seen from fig. 6, the first SSB includes a Primary Synchronization Signal (PSS), an SSS, and a PBCH. Optionally, the time-frequency format of the second SSB is designed according to the time-frequency format of the first SSB.

As shown in (1) of fig. 7, the second SSB includes 1 SSS, and the 1 SSS occupies a third Orthogonal Frequency Division Multiplexing (OFDM) symbol.

On the basis that the second SSB includes 1 SSS, optionally, the time-frequency structure of the second SSB may further include the following cases.

Case 1:

as shown in (2) of fig. 7, the second SSB further includes 1 PSS, the 1 PSS occupying a first OFDM symbol which precedes a third OFDM symbol with only the second OFDM symbol being spaced therebetween.

The relation between the first OFDM symbol, the second OFDM symbol, and the third OFDM symbol is not described in detail below.

Case 2:

as shown in (3) of fig. 7, the second SSB further includes 1 SSS, and the 1 SSS further occupies the first OFDM symbol.

Case 3:

as shown in (4) of fig. 7, the second SSB further includes 1 PSS and 2 SSS, where the 1 PSS occupies the first OFDM symbol, the 2 SSS occupies the second OFDM symbol and the fourth OFDM symbol, respectively, and the fourth OFDM symbol is the first OFDM symbol after the third OFDM symbol.

The fourth OFDM symbol is not described in detail below.

Case 4:

as shown in (5) of fig. 7, the second SSB further includes 3 SSSs, and the 3 SSSs occupy the first OFDM symbol, the second OFDM symbol, and the fourth OFDM symbol, respectively.

Case 5:

as shown in (6) and (7) of fig. 7, the second SSB further includes 1 PSS and 1 SSS, the 1 PSS occupying the first OFDM symbol, and the 1 SSS occupying the fourth OFDM symbol or the second OFDM symbol.

Case 6:

as shown in (8), (9) and (10) of fig. 7, the second SSB further includes 2 SSSs, where the 2 SSSs occupy the second OFDM symbol and the fourth OFDM symbol, respectively, or the 2 SSSs occupy the first OFDM symbol and the second OFDM symbol, respectively.

Case 7:

the second SSB further includes 1 PSS occupying the first OFDM symbol and a demodulation reference signal (DMRS) allowing occupation of the second, third, and fourth OFDM symbols.

Wherein, the 1 PSS and the 1 SSS respectively occupy 127 Resource Elements (REs), and the frequency domain ranges occupied by the 1 PSS and the 1 SSS are the same.

An ith RE of the 60 REs on the second OFDM symbol is the same in frequency as an ith RE of the 60 REs on the fourth OFDM symbol, and a j +1 th RE of the 60 REs on the second OFDM symbol or the fourth OFDM symbol is shifted by 4 REs with respect to the jth RE, i is a positive integer of 60 or less, and j is a positive integer of 59 or less. For example, if the first RE is numbered a +4 and the second RE is numbered a, the first RE is said to be shifted by 4 REs from the second RE.

The frequency of the kth RE of the 24 REs on the third OFDM symbol is the same as the frequency of the kth RE of the 60 REs on the second OFDM symbol, and k is a positive integer less than or equal to 12.

Optionally, the PSS or SSS over the OFDM symbol of the second SSB occupy the same frequency domain range.

That is, the second SSB includes only PSS, SSS, and PBCH DMRS, and does not include PBCH valid data, relative to the first SSB. In this way, the first terminal may measure according to PSS, SSS and PBCH DMRS. The REs originally used for transmitting the PBCH valid data in the second SSB may be used for transmitting other downlink data.

Optionally, the frequency location of the PBCH DMRS in the second SSB is determined according to the frequency location of the PBCH DMRS in the first SSB. For example, the frequency position of PBCH DMRS to SSS in the second SSB is the same as the frequency position of PBCH DMRS to SSS in the first SSB.

It is to be understood that the frequency location of the PBCH DMRS in the first SSB is described in accordance with table 7.4.3.1-1 in the 3GPP protocol 38.211 protocol, as shown in table 5 below, where v = N _ ID ^ cell mod 4, N _id ^ cell represents the physical layer cell identity.

Table 5: PSS, SSS, PBCH DMRS comprised by the first SSB number of REs occupied in the 240 REs comprised by the first SSB

Case 8:

as in (11) and (12) of fig. 7, the second SSB further includes 1 SSS, and the 1 SSS further occupies the second OFDM symbol or the fourth OFDM symbol.

Optionally, the PSS or SSS on the OFDM symbol of the second SSB occupy a different frequency domain range. As shown in (13) of fig. 7, the frequency domain range occupied by the PSS on the first OFDM symbol is the same as the frequency domain range occupied by the SSS on the third OFDM symbol. The SSS occupies the same frequency domain range on the second OFDM symbol as the SSS occupies on the fourth OFDM symbol. However, the SSS occupies a different frequency domain range on the second OFDM symbol than the SSS occupies on the third OFDM symbol.

At this time, different indication information may be represented according to different frequency domain ranges occupied by the PSS or the SSS.

The specific time-frequency format of the second SSB may be configured by the network device, e.g., by SIB1 configuration, or predefined by the protocol.

As can be seen from the above description of the time-frequency format of the second SSB, since the time-frequency format of the second SSB is different from that of the first SSB, a part of time-frequency resources can be saved, and the saved time-frequency resources can be used for sending downlink data.

Optionally, the method 500 further comprises:

s506, the network equipment sends the downlink data in the saved time-frequency resource. Accordingly, the first terminal receives downlink data.

The network device may transmit the downlink data in the saved time-frequency resource in the following possible manners.

Mode 1:

the network device transmits downlink data in a Physical Resource Block (PRB) that does not transmit the second SSB. That is, the time-frequency resource capable of transmitting downlink data is determined by using PRB as granularity.

That is, if the first resource carrying the downlink data and the second SSB overlap, the PRBs including the second SSB are not used for transmission of the downlink data, and the PRBs not including the second SSB in the first resource may be used for transmission of the downlink data.

Optionally, frequency domain resources adjacent to the frequency domain resources occupied by the SSS are not used for transmitting downlink data. It should be understood that the frequency domain resources occupied by the SSS are frequency domain resources included in frequency # a to frequency # B, where frequency # a is the maximum frequency occupied by the SSS and frequency # B is the minimum frequency occupied by the SSS.

An example, frequency domain resources adjacent to frequency domain resources occupied by SSS includes: 9 adjacent REs that are larger than the frequency # a and adjacent to the frequency # a, and 8 adjacent REs that are smaller than the frequency # B and adjacent to the frequency # B.

For example, the frequency domain resources occupied by the SSS are REs numbered 56 to 182, then the frequency domain resources adjacent to the frequency domain resources occupied by the SSS include: RE No. 183 to 191 and RE No. 48 to 55. It should be understood that the numbering of REs is continuous over one OFDM symbol when calculated at this time.

In regard to frequency domain resources adjacent to the frequency domain resources occupied by the SSS, details are not repeated below.

Mode 2:

That is, the RE is used as the granularity to determine the time-frequency resource capable of transmitting the downlink data.

That is, if the first resource carrying the downlink data overlaps with the second SSB, the REs including the second SSB are not used for transmission of the downlink data, and the REs not including the second SSB in the first resource may be used for transmission of the downlink data.

Optionally, frequency domain resources adjacent to the frequency domain resources occupied by the SSS are not used for transmitting downlink data.

Mode 3:

when the second SSB further includes the DMRS, the network device transmits downlink data on PRBs or REs that do not transmit PSS and/or SSS, and REs that do not transmit DMRS.

That is, if a first resource carrying downlink data overlaps with a second SSB, PRBs or REs including PSS and/or SSS of the second SSB are not used for transmission of the downlink data, REs including DMRS of the second SSB are not used for transmission of the downlink data, and other resources in the first resource are available for transmission of the downlink data.

It should be understood that, besides the above-described resource in the first resource is not used for transmission of downlink data, other reasons may also cause other parts of the first resource to be not used for transmission of downlink data, for example, the rate matching resource configured by the network device in a semi-static manner or indicated dynamically is not used for transmission of downlink data.

It is to be understood that, as described above, the second SSB may include contiguous OFDM symbols, and may also include non-contiguous OFDM symbols. As shown in (2) of fig. 7, the second SSB actually includes only the first OFDM symbol and the third OFDM symbol, and the second OFDM symbol is not used for transmission of the second SSB. According to the scheme of the application, the network equipment can send the downlink data in the saved time-frequency resources, so that the utilization rate of the time-frequency resources is improved.

The frequency domain location of the second SSB is next described.

As shown in fig. 6, the first RE occupied by SSS on the third OFDM symbol of the first SSB is offset by 56 REs with respect to the first RE occupied by PBCH on the second OFDM symbol. That is, if the PBCH occupies the first RE with number k, the SSS occupies the first RE with number k +56. That is, the first SSB occupies 240 REs in the frequency domain, corresponding to 20 Resource Blocks (RBs).

Thus, the first SSB may determine the frequency of the PSS or SSS of the first SSB from the first frequency occupied by the PBCH, which is the minimum frequency occupied by the PBCH. Referring to this approach, the network device may indicate a frequency and then determine the frequency domain location of the second SSB based on the frequency. For example, the network device indicates a first frequency, the frequency domain offset of the first frequency and the second SSB in the frequency domain is X, and from the first frequency and the frequency domain offset X, the frequency domain location of the second SSB can be determined. Alternatively, the following ways are included.

Mode 1:

the network device configures a frequency # a to the first terminal, where the frequency # a may be regarded as a minimum frequency occupied by a PBCH included in one virtual SSB, and may be, for example, a start frequency of the PBCH or a center frequency of a first RE included in the PBCH. The first terminal determines the frequency domain location of the second SSB based on frequency # a.

For example, the first terminal may determine the start frequency of the SSS on the third OFDM symbol included in the second SSB according to frequency # a, thereby determining the frequency domain location of the second SSB.

Example one, the second SSB includes SSS on the third OFDM symbol having a starting frequency greater than frequency # a, the SSS on the third OFDM symbol having a starting frequency offset by 56 REs from frequency # a, or SSS on the third OFDM symbol having a center frequency offset by 56 REs from frequency # a.

Mode 2:

the network device configures a frequency # B to the first terminal, where the frequency # B may be regarded as a center frequency of one virtual SSB, and for example, the frequency # B corresponds to a center frequency of a 121 th RE of 240 REs included in one virtual SSB. The first terminal determines frequency # a from frequency # B. Further, the first terminal determines the frequency domain location of the second SSB based on frequency # a.

Alternatively, the first terminal directly determines the frequency domain location of the second SSB based on frequency # B.

Example 1, the second SSB includes a SSS on a third OFDM symbol having a starting frequency less than frequency # B, and a center frequency of a first RE of the SSS on the third OFDM symbol is offset from frequency # B by 64 REs.

Mode 3:

the network device configures a frequency offset between frequency # a and a specific resource to the first terminal. The first terminal determines the frequency # a according to a frequency offset between the frequency # a and the specific resource. The first terminal then determines the frequency domain location of the second SSB based on frequency # a.

The specific resource may be a first BWP configured for the first terminal or a control-resource set (core) configured for the first terminal.

Mode 4:

the network device configures, to the first terminal, a frequency # C corresponding to a start frequency of SSS on a third OFDM symbol included in the second SSB, or the frequency # C corresponding to a center frequency of a first RE of SSS on the third OFDM symbol included in the second SSB.

The time domain location of the second SSB is next described. Wherein the temporal locations include temporal patterns, periods, etc. In this application, a half frame may include 1 or more second SSBs, and a set of the second SSBs in the half frame may be referred to as an add-SSB burst set, or by other names, without limitation.

As a possible implementation manner, the time domain pattern of the add-SSB burst set in the field is the same as the time domain pattern of the CD-SSB burst set (SS burst set) used by the first terminal for initial access in the field.

It should be understood that a CD-SSB burst set includes Lmax candidate SSB resources, and the time domain position (or called time domain pattern) of the candidate SSB resources in a half frame included in the CD-SSB burst set includes various implementations, which can be specifically referred to the description in section 4.1 of 3GPP protocol 38.213.

Similarly, an add-SSB burst set also includes Lmax candidate add-SSB resources.

Specifically, the nth candidate add-SSB resource of the add-SSB burst set in the field and the nth candidate SSB resource of the CD-SSB burst set in the field may be referred to as a one-to-one corresponding resource, or associated resources.

If the network device sends a CD-SSB on the nth candidate SSB resource in a half frame of the CD-SSB burst set, then a second SSB (add-SSB) is also sent on the nth candidate add-SSB resource associated with the half frame of the add-SSB burst set. If the network device does not send a CD-SSB on the nth candidate SSB resource in the half-frame of the CD-SSB burst set, then the second SSB is not sent on the nth candidate add-SSB resource associated with the half-frame of the add-SSB burst set. As a possible way, the network device may send to the first terminal indication information # C indicating a time-domain pattern of the add-SSB burst set in the field. Or, the time domain pattern of the add-SSB burst set in the half frame is specified to be the same as the time domain pattern of the CD-SSB burst set in the half frame in the protocol.

Optionally, if the nth candidate SSB resource in the CD-SSB burst set is located in the y-th to y +3 OFDM symbols in the x-th slot in the half frame, the nth candidate add-SSB resource in the add-SSB burst set corresponding thereto is also located in the x-th slot in the half frame, for the OFDM symbol occupied by the nth candidate add-SSB resource, if the nth candidate add-SSB resource includes the first OFDM symbol as described above, the first OFDM symbol is located in the y-th OFDM symbol of the x-th slot, if the nth candidate add-SSB resource includes the second OFDM symbol as described above, the second OFDM symbol is located in the y +1 OFDM symbol of the x-th slot, if the nth candidate add-SSB resource includes the third OFDM symbol as described above, the third OFDM symbol is located in the y +2 OFDM symbol of the x-th slot, if the nth candidate add-SSB resource includes the fourth OFDM symbol as described above, the x-th OFDM symbol is located in the x-th slot.

As a possible way, the network device sends the indication information # D to the first terminal, the indication information # D indicating the period of the add-SSB burst set. For example, the indication information # D may be carried in SIB1 information. Alternatively, the period of the add-SSB burst set is specified in the protocol to be the same as the period of the CD-SSB burst set. For example, if the network device does not transmit the indication information # D, the period of the add-SSB burst set is defined to be the same as the period of the CD-SSB burst set.

It should be understood that the period of the add-SSB burst set may also be understood as a period including a half frame of the add-SSB, and the period of the add-SSB burst set may also be referred to as a period of the add-SSB.

As a possible way, the network device sends the indication information # E to the first terminal, the indication information # E indicating the period offset of the add-SSB burst set. The first terminal may determine a System Frame Number (SFN) and a half frame number including the add-SSB burst set according to the indication information # E.

Next, the quasi co-location (QCL) relationship of the second SSB is described.

It is assumed that the time-domain pattern of the add-SSB burst set in a field is the same as the time-domain pattern of the CD-SSB burst set in a field. The first SSB is located in the first field and the second SSB is located in the second field.

The number of the first SSBs included in the first half frame and the number of the second SSBs included in the second half frame are both Q, and Q is a positive integer. It may be specified in the protocol that the qth first SSB comprised by the first field has a quasi co-located QCL relationship with the qth second SSB comprised by the second field, the QCL relationship comprising at least one of: the quasi co-location type A QCL-TypeA and the quasi co-location type D QCL-TypeD are used, and Q is a positive integer less than or equal to Q.

Optionally, the QCL relationship further includes at least one of: quasi co-location type B QCL-TypeB, quasi co-location type CQCL-TypeC.

The qth first SSB may be used as a QCL source reference signal (QCL resource reference signal) of the qth second SSB.

It should be understood that the QCL type between the antenna port (antenna port) of the qth first SSB and the antenna port of the qth second SSB may be one or more of QCL-type a, QCL-type b, QCL-type c, or QCL-type d.

When the qth first SSB and the qth second SSB have a QCL relationship, the large-scale channel fading parameters of one port can be inferred from the large-scale channel fading parameters calculated for the other port.

The large-scale channel fading parameters include at least one of the following parameters:

delay spread (delay spread), doppler spread (doppler spread), doppler shift (doppler shift), average gain (average delay), average delay (average delay), or spatial Rx parameters.

It should be understood that reference signal sequences such as PSS, SSS or PBCH DMRS included in the same add-SSB are QCL. The beam directions of reference signal sequences such as PSS, SSS or PBCH DMRS included in one add-SSB may also be considered to be the same.

As an implementation, the second SSB represents different indication information by different reference signal sequences, for example the second SSB carries PEI as described above.

Fig. 8 is a communication apparatus (e.g., a network device, such as a first terminal) provided in an embodiment of the present application, where the communication apparatus may include a transceiver unit 801 and a processing unit 802.

The transceiver unit 801 may be configured to implement corresponding communication functions. The transceiving unit 801 may also be referred to as a communication interface or communication unit. The processing unit 802 may be used to perform processing operations.

Optionally, the communication apparatus further includes a storage unit, where the storage unit may be configured to store instructions and/or data, and the processing unit 802 may read the instructions and/or data in the storage unit to implement the actions performed by the network device in the foregoing various method embodiments or to implement the actions performed by the first terminal in the foregoing various method embodiments.

In the first design, the communication device may be the network device in the foregoing embodiment, or may be a component (e.g., a chip) of the network device. The communication means may implement the steps or procedures performed by the network device corresponding to the above method embodiments.

Specifically, in a possible manner, the transceiving unit 801 is configured to transmit the first configuration information, and is further configured to transmit the second DCI in the paging search space set configured in the second BWP, and is further configured to transmit the first DCI in the paging search space set configured in the first BWP. Processing unit 802 may be configured to generate the first configuration information, generate the second DCI, and generate the first DCI.

In another possible manner, the transceiving unit 801 is configured to send the first configuration information, and is further configured to send the short message class information during the RA is executed by the first terminal in the RA search space set. The processing unit 802 may be configured to generate first configuration information.

In another possible manner, the transceiver 801 is configured to send the first configuration information and also send the first indication information. The processing unit 802 may be configured to generate first configuration information and generate first indication information.

In another possible manner, the transceiving unit 801 is configured to send the first SSB, and is further configured to send configuration information of the second SSB in the first cell, and is further configured to send the second SSB according to the configuration information of the second SSB. The processing unit 802 may be configured to generate a first SSB and generate a second SSB.

In a second design, the communication device may be the first terminal in the foregoing embodiment, or may be a component (e.g., a chip) of the first terminal. The communication device may implement steps or procedures corresponding to those performed by the first terminal in the above method embodiments.

Specifically, in a possible manner, the transceiving unit 801 is configured to receive the first configuration information, and is further configured to receive the second DCI in the paging search space set configured in the second BWP, and is further configured to receive the first DCI in the paging search space set configured in the first BWP. The processing unit 802 may be configured to decode the second DCI, and acquire the short message type information from the second DCI, and may also be configured to decode the first DCI, and acquire the short message type information from the first DCI.

In another possible manner, the transceiving unit 801 is configured to receive the first configuration information, and is further configured to receive short message class information during the process that the first terminal performs RA in the RA search space set.

In another possible manner, the transceiving unit 801 is configured to receive the first configuration information and is further configured to receive the first indication information. The processing unit 802 may be configured to decode the first indication information and determine which BWP to listen to the paging PDCCH.

In another possible approach, the transceiver 801 is configured to receive the first SSB, and is further configured to receive configuration information of the second SSB in the first cell, and is further configured to receive the second SSB. The processing unit 802 is configured to determine to connect to the first cell according to the first SSB, and is further configured to perform measurement according to the second SSB.

It should be understood that the specific processes of the units for executing the corresponding steps have been described in detail in the above embodiments of the methods, and therefore, for brevity, are not described again here.

It should also be understood that the multilink device herein is embodied in the form of a functional unit. The term unit herein may refer to an Application Specific Integrated Circuit (ASIC), an electronic circuit, a processor (e.g., a shared, dedicated, or group processor), and memory that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable components that support the described functionality. In an optional example, as will be understood by those skilled in the art, the multi-link device may be specifically a first MLD in the foregoing embodiments, and may be configured to execute each procedure and/or step corresponding to the first MLD in each method embodiment described above, or the multi-link device may be specifically a second MLD in the foregoing embodiments, and may be configured to execute each procedure and/or step corresponding to the second MLD in each method embodiment described above, and details are not described here again to avoid repetition.

The multi-link device of each of the above aspects has a function of implementing the corresponding steps performed by the multi-link device (e.g., the first MLD, or the second MLD) in the above method. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software comprises one or more modules corresponding to the functions; for example, the transceiver unit may be replaced by a transceiver (for example, the transmitting unit in the transceiver unit may be replaced by a transmitter, and the receiving unit in the transceiver unit may be replaced by a receiver), and other units, such as a processing unit, may be replaced by a processor, so as to perform the transceiving operation and the related processing operation in the respective method embodiments, respectively.

Furthermore, the transceiver 801 may also be a transceiver circuit (for example, may include a receiving circuit and a transmitting circuit), and the processing unit may be a processing circuit.

It should be noted that the multi-link device in fig. 8 may be the first MLD or the second MLD in the foregoing embodiments, and may also be a chip or a chip system, for example: system on chip (SoC). The transceiver unit can be an input/output circuit and a communication interface; the processing unit is a processor or a microprocessor or an integrated circuit integrated on the chip. And are not limited herein.

An embodiment of the present application further provides a communication device, as shown in fig. 9, including: a processor 901. The processor 901 is configured to execute computer programs or instructions stored in the memory 903 or read data stored in the memory 903 to perform the methods in the above embodiments of the methods. Optionally, the processor 901 is one or more. The communication device further comprises a communication interface 902, the communication interface 902 being used for the reception and/or transmission of signals. For example, the processor 901 is used to control the communication interface 902 to receive and/or transmit signals.

Optionally, as shown in fig. 9, the communication device further comprises a memory 903, the memory 903 being used for storing computer programs or instructions and/or data. The memory 903 may be integrated with the processor 901 or may be provided separately. Optionally, the memory 903 is one or more.

Optionally, the processor 901, communication interface 902, and memory 903 are interconnected by a bus 904; the bus 904 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus 904 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown in FIG. 9, but this does not indicate only one bus or one type of bus.

As another scheme, the communication device is configured to implement the operations performed by the network device or the first terminal in the above method embodiments.

For example, when the communication device is a network device, the processor 901 may be configured to generate first configuration information, generate a second DCI, and generate a first DCI; a communication interface 902, configured to transmit the first configuration information, and further configured to transmit the second DCI in the paging search space set configured in the second BWP, and further configured to transmit the first DCI in the paging search space set configured in the first BWP.

For another example, when the communication device is a first terminal, the communication interface 902 is configured to receive the first configuration information, and is further configured to receive a second DCI in a paging search space set configured in a second BWP, and is further configured to receive a first DCI in a paging search space set configured in a first BWP; the processor 901 may be configured to decode the second DCI to obtain the short message class information from the second DCI, and may also be configured to decode the first DCI to obtain the short message class information from the first DCI.

It should be understood that the processor (e.g., the processor 901) mentioned in the embodiments of the present application may be a Central Processing Unit (CPU), a Network Processor (NP), or a combination of the CPU and the NP. The processor may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a Programmable Logic Device (PLD), or a combination thereof. The PLD may be a Complex Programmable Logic Device (CPLD), a field-programmable gate array (FPGA), a General Array Logic (GAL), or any combination thereof.

It will also be appreciated that the memory referred to in the embodiments herein, such as memory 903, may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one type of logical functional division, and other divisions may be realized in practice, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of communication, comprising:

the first terminal receives first configuration information from the network equipment;

wherein the first configuration information is used to configure a paging search space set within a first bandwidth part BWP and a second BWP;

when the first BWP is an active BWP, the first terminal receives first downlink control information DCI in a paging search space set configured in the first BWP, where the first DCI includes short message class information, and the first DCI is not used to schedule a paging physical downlink shared channel PDSCH;

and when the second BWP is an active BWP, the first terminal receives second DCI in a paging search space set configured in the second BWP, wherein the second DCI comprises short message class information and can schedule a paging PDSCH.

2. A method of communication, comprising:

the network equipment sends first configuration information to a first terminal;

the network device sends first Downlink Control Information (DCI) to the first terminal in a paging search space set configured in the first BWP, wherein the first DCI comprises short message class information, and the first DCI is not used for scheduling a paging Physical Downlink Shared Channel (PDSCH);

and the network equipment transmits second DCI in the paging search space set configured in the second BWP, wherein the second DCI comprises short message class information, and the second DCI can schedule paging PDSCH.

3. The method according to claim 1 or 2,

the first DCI is not used for scheduling a paging PDSCH, and includes:

the first DCI comprises a short message indication field which indicates that the first DCI does not comprise the scheduling information of the PDSCH; or,

the first DCI includes a first bit field, the first bit field being a bit field other than a short message indication field and a short message field, the first bit field being set to a first preset value or being reserved.

4. The method according to any one of claims 1 to 3,

the configuration of the first BWP intra-paging search space set is the same as the configuration of the second BWP intra-paging search space set;

monitoring period, period offset, the number of continuous time slots of each monitoring occasion, monitoring symbols in the monitoring occasions, a candidate Physical Downlink Control Channel (PDCCH) aggregation level, the number of PDCCH candidates corresponding to the candidate PDCCH aggregation level, a search space set type and a DCI format related to a search space.

5. The method according to any one of claims 1 to 4,

the first configuration information is further configured to configure a random access, RA, search space set in the first BWP, where the RA search space set is used for the first terminal to perform random access in the first BWP, and the first DCI is received during RA execution in the first BWP by the first terminal.

6. The method according to any one of claims 1 to 5,

the first configuration information is further configured to configure a paging occasion PO in the first BWP and the second BWP, where the configuration of the PO in the first BWP is the same as the configuration of the PO in the second BWP;

wherein the configuration of the PO includes at least one of:

7. The method according to any one of claims 1 to 5,

the first configuration information is further configured to configure paging occasions PO in the first BWP and the second BWP, where a partial configuration of POs in the first BWP is the same as a partial configuration of PO in the second BWP, where the partial configuration includes a ratio of paging frames in a radio frame and a paging frame offset;

8. A method of communication, comprising:

wherein the first configuration information is used for configuring a paging search space set in a first bandwidth part BWP and in a second BWP, and the paging search space set is used for the first terminal to monitor a paging PDCCH;

the first terminal receiving first indication information for indicating the first terminal to monitor one BWP of a paging PDCCH from the first BWP and the second BWP;

the first terminal monitors a paging PDCCH at the one BWP.

9. The method of claim 8,

the first configuration information is further used for configuring Paging Occasions (POs) in the first BWP and the second BWP;

the method further comprises the following steps:

and the first terminal receives second indication information, wherein the second indication information indicates that the first terminal listens to the first indication information in the second BWP.

10. The method of claim 9,

the first indication information is further used for indicating whether the first terminal monitors a paging PDCCH.

11. The method of claim 10,

the second indication information is further used to indicate the second terminal to monitor the first indication information at the second BWP, and the first indication information is further used to indicate whether the second terminal monitors the paging PDCCH.

12. The method of claim 11,

the first indication information includes a first bit field for indicating whether the first and second terminals monitor a paging PDCCH, and a second bit field for indicating that the first terminal monitors one BWP of the paging PDCCH from among the first and second BWPs.

13. The method of claim 12,

the configuration of the PO in the first BWP is the same as that of the PO in the second BWP, and the configuration of the PO comprises: the proportion of paging frames in a wireless frame, the offset of the paging frames and the number of paging occasions included in each paging frame, the first indication information is associated with N POs in the second BWP, and N is a positive integer;

for an ith PO of the N POs, the first bit field comprises a bit i used for indicating whether all terminals on the ith PO monitor a paging PDCCH; or,

for the ith PO, the first bit field includes a bit i1 and a bit i2, the bit i1 is used to indicate whether all the first class terminals on the ith PO monitor the paging PDCCH, the bit i2 is used to indicate whether all the second class terminals on the ith PO monitor the paging PDCCH, the first terminal belongs to the first class terminal, and the second terminal belongs to the second class terminal; or,

for the ith PO, the all first class terminals on the ith PO are divided into x groups, the all second class terminals on the ith PO are divided into y groups, the first bit field comprises bits i1 to ix and bits i (x + 1) to i (x + y), the bits i1 to ix correspond to the x groups of terminals one by one, the bits i (x + 1) to i (x + y) correspond to the y groups of terminals one by one, each bit of the bits i1 to ix and bits i (x + 1) to i (x + y) is used for indicating whether the corresponding group of terminals monitors paging PDCCH, and x and y are positive integers; or,

for the ith PO, all terminals on the ith PO are divided into j groups, at least one group of terminals in the j groups of terminals comprises at least one first-class terminal and at least one second-class terminal, the first bit field comprises bits i1 to ij, the bits i1 to ij correspond to the j groups of terminals one by one, each bit in the bits i1 to ij is used for indicating whether the corresponding group of terminals monitors a paging PDCCH, and j is a positive integer;

wherein i is a positive integer less than or equal to N.

14. The method according to claim 12 or 13,

the configuration of the PO in the first BWP is the same as the configuration of the PO in the second BWP, and the configuration of the PO comprises: the proportion of paging frames in a wireless frame, the paging frame offset and the number of paging occasions included in each paging frame, wherein the first indication information is associated with N POs in the second BWP, and N is a positive integer;

for a kth PO of the N POs, the second bit field includes a bit k, where the bit k is used to indicate all first class terminals on the kth PO to monitor one BWP of a paging PDCCH, and the k is a positive integer less than or equal to N, and the first terminal belongs to the first class terminal; or,

the first indication information is associated with M paging frames PF in the second BWP, and for an mth PF of the M PFs, the second bit field includes a bit M, where the bit M is used to indicate that all first class terminals on all POs included in the mth PF monitor one BWP of a paging PDCCH, the M is a positive integer, and the M is a positive integer less than or equal to M; or,

the second bit field includes 1 bit, and the 1 bit is used to indicate that all the first class terminals on all POs associated with the first indication information monitor one BWP of the paging PDCCH.

15. The method of claim 12,

the partial configuration of the PO in the first BWP is the same as the partial configuration of the PO in the second BWP, where the partial configuration includes the proportion of paging frames in a wireless frame and the paging frame offset, and the number of paging occasions included in each paging frame in the first BWP is different from the number of paging occasions included in each paging frame in the second BWP;

the number of the POs associated with the first indication information in the first BWP is a first numerical value, and the number of the POs associated with the first indication information in the second BWP is a second numerical value;

the first bit field comprises a number of bits associated with the second value; or,

16. The method according to claim 12 or 15,

the partial configuration of the PO in the first BWP is the same as the partial configuration of the PO in the second BWP, where the partial configuration includes a ratio of paging frames in a radio frame and a paging frame offset, and the number of paging occasions included in each paging frame in the first BWP is different from the number of paging occasions included in each paging frame in the second BWP;

the number of POs associated with the first indication information in the first BWP is a first numerical value, and the number of POs associated with the first indication information in the second BWP is a second numerical value;

said second bit field comprises a number of bits equal to said first value; or,

said second bit field comprising a number of bits equal to said second value; or,

said second bit field comprising a number of bits equal to the smaller of said first value and said second value; or,

said second bit field comprising a number of bits equal to the greater of said first value and said second value; or,

the second bit field comprises a number of bits equal to a third value, where the third value is the number of PFs associated with the first indication information in the second BWP; or,

the second bit field includes 1 bit, where the 1 bit is used to indicate that all the first class terminals on all POs associated with the first indication information monitor one BWP of the paging PDCCH, and the first terminal belongs to the first class terminal.

17. The method according to any one of claims 8 to 16,

the first configuration information is further used for configuring a random access, RA, search space set within the first BWP, the RA search space set being used for the first terminal to perform random access within the first BWP;

the method further comprises the following steps:

when the first terminal performs random access within the first BWP, the first terminal receives a fourth DCI from the network device in the set of paging search spaces configured within the first BWP, where the fourth DCI includes short message class information.

18. A method of communication, comprising:

wherein the first configuration information is used for configuring a paging search space set in a first bandwidth part (BWP) and in a second BWP, and the paging search space set is used for the first terminal to monitor a paging PDCCH;

the network device sends first indication information, where the first indication information is used to indicate that the first terminal monitors one BWP of a paging PDCCH from the first BWP and the second BWP.

19. The method of claim 18,

the first configuration information is further used for configuring a paging occasion PO within the first BWP and within the second BWP;

the method further comprises the following steps:

and the network equipment sends second indication information, wherein the second indication information indicates that the first terminal monitors the first indication information at the second BWP.

20. The method of claim 19,

21. The method of claim 20, further comprising:

the network equipment sends second configuration information to a second terminal;

wherein the second configuration information is used to configure a paging search space set within the second BWP and to configure a PO within the second BWP.

22. The method of claim 21,

the second indication information is further used to indicate the second terminal to monitor the first indication information at the second BWP, and the first indication information is further used to indicate whether the second terminal monitors a paging PDCCH.

23. The method of claim 22,

24. The method of claim 23,

wherein i is a positive integer less than or equal to N.

25. The method of claim 23 or 24,

the configuration of the PO in the first BWP is the same as that of the PO in the second BWP, and the configuration of the PO comprises: the proportion of paging frames in a wireless frame, the paging frame offset and the number of paging occasions included in each paging frame, wherein the first indication information is associated with N POs in the second BWP, and N is a positive integer;

26. The method of claim 23,

27. The method of claim 23 or 26,

said second bit field comprises a number of bits equal to said first value; or,

said second bit field comprises a number of bits equal to said second value; or,

said second field of bits comprising a number of bits equal to the smaller of said first value and said second value; or,

the second bit field comprises a bit number equal to a third value, wherein the third value is the number of PFs associated by the first indication information in the second BWP; or,

28. The method of any one of claims 18-27,

the method further comprises the following steps:

29. A communications device comprising means for performing the method of any of claims 1-28.

30. A communication device, comprising: a communications interface and a processor for executing a computer program or instructions stored in a memory, causing the communications device to perform the method of any of claims 1-28.

31. A computer-readable storage medium, storing a computer program or instructions which, when run on a computer, cause the computer to perform the method of any one of claims 1-28.

32. A chip, comprising: at least one processor configured to execute computer programs or instructions in a memory such that the method of any of claims 1-28 is implemented.