CN113453165B

CN113453165B - Method and device for sending SC-MCCH (Single Carrier-multicast control channel) scheduling information in NR (non-reciprocal) cell

Info

Publication number: CN113453165B
Application number: CN202010232280.4A
Authority: CN
Inventors: 魏立梅; 袁乃华; 陈迎; 范晨; 周志宏; 朱玉梅
Original assignee: Chengdu TD Tech Ltd
Current assignee: Chengdu TD Tech Ltd
Priority date: 2020-03-27
Filing date: 2020-03-27
Publication date: 2022-10-21
Anticipated expiration: 2040-03-27
Also published as: CN113453165A

Abstract

The embodiment of the invention provides a method and equipment for sending SC-MCCH scheduling information in an NR (non-random access memory) cell, wherein the SC-MCCH scheduling information of a single-cell multicast control channel comprises SC-MCCH semi-static configuration information and SC-MCCH dynamic scheduling information, and the method comprises the following steps: and broadcasting SC-MCCH semi-static configuration information through SIB1 or newly-added SIB, and sending SC-MCCH dynamic scheduling information corresponding to corresponding time in the NR cell aiming at each time allocated to PDSCH corresponding to the SC-MCCH, wherein the SC-MCCH dynamic scheduling information comprises time-frequency resource allocation information allocated to PDSCH corresponding to the SC-MCCH in the corresponding time, and the time-frequency resource allocation information is represented by a DCI format. The SC-MCCH scheduling information is broadcasted in the cell in the 5G system.

Description

Method and device for sending SC-MCCH (Single Carrier-multicast control channel) scheduling information in NR (non-reciprocal) cell

Technical Field

The embodiment of the invention relates to the technical field of data transmission, in particular to a method and equipment for sending SC-MCCH (Single Carrier-multicast control channel) scheduling information in an NR (non-uniform resource locator) cell.

Background

MBMS (Multimedia Broadcast Multicast Service) is a typical Service supported by LTE (Long Term Evolution) system in 3GPP (The 3rd Generation Partnership Project) protocol, and The Service can be transmitted to a specific UE through a unicast Bearer or Broadcast in a cell through an MBMS Bearer (MBMS Bearer).

The mode of broadcasting the MBMS through the MBMS bearer comprises the following steps: MBSFN (Multimedia Broadcast multicast service Single Frequency Network) mode and SC-PTM (Single Cell Point To multipoint) mode. In order for the intra-cell UE to receive the MBMS broadcast in the SC-PTM manner, SC-PTM configuration information needs to be broadcast in the cell. The SC-PTM configuration information is a set of configuration information of each MBMS broadcasted in a cell in an SC-PTM mode. The configuration information of one MBMS at least comprises the configuration information of PDSCH corresponding to SC-MTCH carrying MBMS data. And the UE can receive the data of the corresponding MBMS according to the configuration information of the PDSCH corresponding to the SC-MTCH in the configuration information of any MBMS in the SC-PTM configuration information. SC-PTM configuration information is loaded through a unique SC-MCCH in a cell, the SC-MCCH is mapped to an independent DL-SCH, the DL-SCH is mapped to an independent PDSCH, and the SC-PTM configuration information loaded on the SC-MCCH is broadcast in the cell through the PDSCH corresponding to the SC-MCCH. In order to enable the UE to receive the PDSCH corresponding to the SC-MCCH, the SC-MCCH scheduling information needs to be broadcasted in the cell. The SC-MCCH scheduling information is radio resource allocation information of a PDSCH corresponding to the SC-MCCH.

As the wireless internet age has started, wireless internet has put more diverse demands on the development of wireless networks, including higher system throughput, lower transmission delay, higher reliability, and more user connection counts. To meet these demands, 5G systems have come into force. The gNB is a base station of the 5G system, and a cell controlled by the gNB is referred to as an NR (New radio Access) cell. Currently, the 5G system does not support the broadcast of the SC-MCCH scheduling information within a cell.

Disclosure of Invention

The embodiment of the invention provides a method and equipment for sending SC-MCCH scheduling information in an NR (non-reciprocal) cell, so as to realize sending of the SC-MCCH scheduling information in the NR cell.

In a first aspect, an embodiment of the present invention provides a method for sending SC-MCCH scheduling information in an NR cell, where the SC-MCCH scheduling information of a single-cell multicast control channel includes SC-MCCH semi-static configuration information and SC-MCCH dynamic scheduling information, and the method includes: broadcasting SC-MCCH semi-static configuration information through SIB1 or newly-added SIB; and in a new radio access technology (NR) cell, sending SC-MCCH dynamic scheduling information corresponding to corresponding occasions aiming at all the occasions allocated to a Physical Downlink Shared Channel (PDSCH) corresponding to the SC-MCCH, wherein the SC-MCCH dynamic scheduling information comprises time-frequency resource allocation information allocated to the PDSCH corresponding to the SC-MCCH in the corresponding time, and the time-frequency resource allocation information is represented by a Downlink Control Information (DCI) format.

Optionally, the SC-MCCH semi-static configuration information includes: controlling resource set CORESET configuration information, search space configuration information and SC-MCCH semi-static time domain configuration information, wherein the SC-MCCH semi-static time domain configuration information comprises: and sending the configuration information of the BWP of the SC-MCCH and the SC-MCCH broadcast parameters.

Optionally, the method further includes: and in the NR cell, when the SC-MCCH semi-static configuration information is sent by adopting a newly added SIB, the newly added SIB is sent in the cell as required.

Optionally, the sending, in the NR cell, the SC-MCCH dynamic scheduling information corresponding to the corresponding time includes: configuring a search space and a CORESET corresponding to a PDCCH (physical downlink control channel), wherein for each time for sending a PDSCH (physical downlink shared channel) corresponding to an SC-MCCH (single cell-multicast control channel), the PDCCH is used for carrying SC-MCCH dynamic scheduling information corresponding to the time, the CRC (cyclic redundancy check) of the PDCCH is scrambled by an SC-RNTI (single cell-radio network temporary identifier), and the SC-RNTI is used for identifying the only SC-MCCH or SC-PTM (single cell-multicast control channel) configuration information of a cell; after time-frequency resources are successfully allocated to PDSCHs corresponding to SC-MCCH carrying each SC-PTM configuration information segment, for each segment, determining time slot subscripts of K PDCCH occasions corresponding to each segment according to K0 adopted by PDSCH corresponding to each segment in PDSCH time domain resource allocation and K time slot subscripts of corresponding SC-MCCH segments, and uniformly allocating or respectively allocating Control Channel Element (CCE) resources for PDCCH transmitted in the K PDCCH occasions, wherein for each occasion in the K occasions, the K0 adopted by PDSCH in each occasion and the time slot subscript of the occasion determine the time slot subscript of the PDCCH occasion corresponding to the occasion, the K0 is a timing difference between PDSCH transmitted in one occasion and PDCCH carrying PDSCH dynamic scheduling information of the PDSCH of the occasion, the unit is a time slot, the K0> = is used for indicating that the PDSCH is transmitted prior to the PDSCH or is transmitted simultaneously with the PDSCH, when the time domain resources are allocated to one occasion, the value of the K is a value of a PDSCH/PTCH of a PTCH block in a current NR cell, wherein the number of SS/PBCH beam configuration is not required to be transmitted on SC-SC segments, and SC-SC beam configuration information is not required to be transmitted on SC-SC; for each segment, respectively adopting K wave beams to transmit PDCCH scrambled by SC-RNTI for CRC in K PDCCH occasions corresponding to the segment, wherein the PDCCH adopts distributed CCE resources to transmit in each PDCCH occasion, and the DCI format carried on the PDCCH is SC-MCCH dynamic scheduling information of corresponding occasions, wherein the K wave beams adopted when the PDCCH is transmitted in the K PDCCH occasions corresponding to each segment are the same as the K wave beams adopted when a cell SS/PBCH block is transmitted, the wave beams adopted when the PDCCH is transmitted in each PDCCH occasion are the wave beams adopted when the PDSCH is transmitted in corresponding occasions, and corresponding processing is carried out on the PDCCH before the PDCCH is transmitted in each PDCCH occasion.

Optionally, the performing corresponding processing on the PDCCH specifically includes: when bit scrambling is performed on a PDCCH carrying SC-MCCH scheduling information, an initialization value of a pseudo-random sequence generator is determined according to the following formula, and related parameters in the following formula are configured according to a given value or a given configuration mode: c. C _init ＝(n _RNTI ·2 ¹⁶ +n _ID )mod2 ³¹ Wherein n is _ID Scrambling ID, n for PDCCH _RNTI An RNTI employed for the UE as a receiver; n is _ID Configured in any of the following ways:

a physical layer cell ID of a cell; a PDCCH scrambling ID is uniformly configured for the PDCCH bearing the SC-MCCH scheduling information in each cell, and the PDCCH bearing the SC-MCCH scheduling information in all the cells adopts the value to perform bit scrambling; or configuring a fixed value as PDCCH scrambling ID for PDCCH bearing SC-MCCH scheduling information in an NR cell in a 3GPP protocol;

n _RNTI the setting is performed in any of the following ways: n is _RNTI =0; setting n _RNTI Has a value ofSC-RNTI used for configuring information at empty mark SC-MCCH or SC-PTM, in the invention, n is set _RNTI The value of SC-RNTI is used for bearing PDCCH of SC-MCCH scheduling information on an empty identifier; performing the following processing on the generation process of the DMRS of the PDCCH carrying the SC-MCCH scheduling information: determining an initialization value of the pseudo-random sequence generator according to the following formula, wherein the related parameters are configured according to a given value or a given configuration mode in the following formula:

wherein,

for the number of symbols included in one slot,

index of time slot in a radio frame when SCS parameter of NR cell is u, l is index of symbol in a time slot, N _ID E {0,1, … …,65535} is the scrambling ID of PDCCH DMRS,

N _ID the setting is performed in any of the following ways:

allocation of N to DMRS of PDCCH bearing SC-MCCH scheduling information in cell _ID (ii) a Or to N in 3GPP protocols _ID A fixed value is assigned.

Optionally, the configuring the search space and the CORESET corresponding to the PDCCH includes: and scrambling CRC of the PDCCH bearing the SC-MCCH scheduling information by using SC-RNTI, wherein the type of a search space corresponding to the PDCCH is as follows: the common type is represented by a common search space CSS-C corresponding to the SC-MCCH, the common search space corresponding to the PDCCH is represented by CORESET-C, and the aggregation level L =1,2,4,8 or 16 adopted by the CSS-C on the CORESET-C; in an NR cell, the whole system bandwidth is divided into a plurality of BWPs, and a unique SC-MCCH in the cell is transmitted in the initial BWP or in other BWPs, wherein the cell has a unique CSS-C, the BWP where the CORESET-C corresponding to the CSS-C is located and the adopted air interface resources are designated, and the CORESET-C and the SC-MCCH are in the same BWP.

Optionally, the method further includes: and configuring the CSS-C and a CORESET-C corresponding to the CSS-C in order to meet the requirement that the PDCCH bearing the SC-MCCH scheduling information is broadcasted in the whole cell.

Optionally, the configuring the CORESET-C corresponding to the CSS-C includes: the CORESET subscript is set according to the number of CORESET-C in all CORESETs in the cell or the number of CORESET-C in all CORESETs defined in the current BWP; setting the length of the PDCCH opportunity as the total number of continuous symbols occupied by PDCCH Ocvasion, wherein the value of the total number of continuous symbols occupied by PDCCH Ocvasion is as follows: 1,2 or 3; setting the frequency resources occupied by the CORESET, wherein the frequency resources occupied by the CORESET are represented by a group of RBs; the mapping mode from CCE to REG is specified in 3GPP protocol or indicated by parameters to be non-interleaving mapping or interleaving mapping; when the 3GPP protocol specifies that the mapping manner from CCE to REG in CORESET-C is: when CORESET-C is specified to fixedly adopt a non-interleaving mapping mode or an interleaving mapping mode during non-interleaving mapping or interleaving mapping, corresponding parameters do not need to be carried in configuration information of the CORESET-C and are used for indicating a mapping mode from CCE to REG; when the mapping mode from CCE to REG in CORESET-C is indicated through the parameter, the mapping mode from CCE to REG adopted by CORESET-C is indicated through the parameter of 1 bit in the configuration information, and when the parameter is not configured, the default is as follows: interleaving mapping is not adopted; when the CORESET-C adopts the interleaving mapping, the configuration information of the CORESET-C needs to carry: length L of REG bundle, interleaving depth R and offset n of interleaver _shift Wherein, the length L of the REG bundle is the number of REGs included in each REG bundle, and the interleaving depth R is: the interleaver includes a number of rows, when n is not configured _shift Then, default is as follows:

the 3GPP protocol specifies: when the interleaving mapping mode is adopted and L and R are not configured, default values of L and R are set as follows: l =6, R =2.

Optionally, the configuring the CSS-C includes: push buttonThe numbers of CSS-C in all SSs in a cell, the numbers of CSS-C in all SSs defined in BWP where CSS-C is located, or the numbers of CSS-C in all CSS defined in BWP where CSS-C is located define subscripts of a search space; setting the corresponding CORESET subscript: subscript of CORESET-C, mapping CSS-C to CORESET indicated by the subscript; setting a PDCCH monitoring period and PDCCH monitoring bias, wherein the unit of the monitoring period is a time slot; setting a monitoring mode of the PDCCH as a subscript of a first symbol of CORESET-C in a time slot for monitoring the PDCCH, wherein the subscript of the first symbol of CORESET-C in the time slot for monitoring the PDCCH and the length of PDCCH Ocvasion in CORESET-C configuration information jointly determine the specific position of each PDCCH Ocvasion; setting the number of time slots for which the search space lasts in one monitoring period: t is _s <k _s (ii) a The number N (L) of PDCCHs with the aggregation level L which need to be detected in each PDCCH detection time machine, wherein L =1,2,4,8, 16; setting the type of the search space as COMMON; and setting RNTI and DCI formats to be monitored in a search space, wherein CRC of the PDCCH is scrambled by SC-RNTI, and an initialization value of a scrambling sequence generator of the PDSCH is generated according to the SC-RNTI.

Optionally, the method further includes: according to the configuration information of CSS-C, the frame number n corresponding to the first PDCCH opportunity in each PDCCH monitoring period _f And time slot number

Determined by the following expression:

wherein,

the time slot number of a radio frame is represented when the SCS parameter of the PDCCH is mu, starting from the first PDCCH opportunity in the PDCCH monitoring period, the PDCCH opportunities in the PDCCH monitoring period are numbered according to the time sequence, and the total number is T _s Each time, the time number is from 0 to T _s -1; for CSS-C of subscript s mapped onto CORESET-C of subscript p, each aggregation levelThe CCE occupied by the next candidate PDCCH is defined by the following expression:

wherein L is polymerization grade, i =0, …, L-1,N _CCE,p The total number of CCEs in CORESET-C with subscript p, the subscript range of CCEs in CORESET-M: 0 to N _CCE,p -1，m _s Is a subscript of a PDCCH candidate of aggregation level L,

is the number of PDCCH candidates with aggregation level L in CSS-C.

Optionally, the method further includes: when the CSS-C is mapped to CORESET 0, it is indicated on PBCH with 1 bit whether the CSS-C of the current cell is mapped to CORESET 0, where the CSS-C is mapped to CORESET 0 when the bit is 1 and the CSS-C is not mapped to CORESET 0 when the bit is 0.

In a second aspect, an embodiment of the present invention provides a device for sending SC-MCCH scheduling information in an NR cell, where the SC-MCCH scheduling information of a single-cell multicast control channel includes SC-MCCH semi-static configuration information and SC-MCCH dynamic scheduling information, and the device includes: the broadcast module is used for broadcasting the SC-MCCH semi-static configuration information through SIB1 or newly added SIB; and the sending module is used for sending SC-MCCH dynamic scheduling information corresponding to corresponding occasions aiming at all the occasions allocated to the PDSCH corresponding to the SC-MCCH in the NR cell of the new radio access technology, wherein the SC-MCCH dynamic scheduling information comprises time-frequency resource allocation information allocated to the PDSCH corresponding to the SC-MCCH in the corresponding time, and the time-frequency resource allocation information is represented by a DCI format.

In a third aspect, an embodiment of the present invention provides a device for sending SC-MCCH scheduling information in an NR cell, including: at least one processor and memory;

the memory stores computer-executable instructions;

the at least one processor executing the memory stored computer-executable instructions causes the at least one processor to perform the method of transmitting SC-MCCH scheduling information in an NR cell according to any of the first aspect.

In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, where a computer executes instructions, and when a processor executes the computer-readable storage medium, the method for sending SC-MCCH scheduling information in an NR cell according to any one of the first aspect is implemented.

According to the method and the device for sending the SC-MCCH scheduling information in the NR cell, provided by the embodiment of the invention, after the scheme is adopted, the SC-MCCH semi-static configuration information can be broadcasted through SIB1 or newly-added SIB, and the SC-MCCH dynamic scheduling information is sent in the NR cell of a new wireless access technology, so that the SC-MCCH scheduling information is broadcasted in the cell in a 5G system.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic diagram of an architecture of a NG-RAN in a 5G system according to an embodiment of the present invention;

fig. 2 is a flowchart illustrating a method for transmitting SC-MCCH scheduling information in an NR cell according to an embodiment of the present invention;

fig. 3 is a flowchart illustrating a method for transmitting SC-MCCH scheduling information in an NR cell according to another embodiment of the present invention;

fig. 4 is a schematic structural diagram of a device for transmitting SC-MCCH scheduling information in an NR cell according to an embodiment of the present invention;

fig. 5 is a schematic hardware structure diagram of a device for sending SC-MCCH scheduling information in an NR cell according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Fig. 1 is a schematic diagram of an architecture of a NG-RAN (Next Generation Radio Access Network) in a 5G system according to an embodiment of the present invention. In the figure, a gNB is a base station of a 5G system, a cell controlled by the gNB is an NR cell, an ng-eNB is an enhanced LTE base station accessed to a 5G core network, and a cell controlled by the ng-eNB is an LTE cell. The gNB and the NG-eNB are respectively connected with the 5GC through NG interfaces, the gNB is interconnected through an Xn interface, the gNB is connected with the NG-eNB through an Xn interface, and the NG-eNB is interconnected through an Xn interface.

The technical solution of the present invention will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.

The sending method of SC-PTM configuration information in an NR cell may specifically include: the base station configures a unique logic channel SC-MCCH in an NR cell carrying MBMS broadcast in an SC-PTM mode, SC-MCCH is adopted to carry SC-PTM configuration information in the NR cell, the SC-MCCH is mapped to an independent DL-SCH, and the DL-SCH is mapped to an independent PDSCH.

Determining a Bandwidth Part (Bandwidth slice or Bandwidth fragment) of a BWP (cell Bandwidth control point) for transmitting the SC-MCCH in a cell, and repeatedly transmitting the same SC-PTM configuration information in each repetition period (length is B radio frames) in a modification period (length is A radio frames) in the BWP. The contents of the SC-PTM configuration information can only be updated at the beginning of each modification period and cannot be updated within one modification period. The starting position for transmitting the SC-MCCH in each repetition period is determined by the corresponding parameters.

When the SC-PTM configuration information is divided into m segments, m segments of the SC-PTM configuration information are transmitted through the SC-MCCH according to the time sequence on K continuous occasions from the starting position of transmitting the SC-MCCH in each repetition period, each segment corresponds to K continuous occasions from the first segment, and the SC-MCCH transmits the same segment by adopting K different wave beams in the corresponding K continuous occasions. Namely: and transmitting the ith segment by using the kth beam in the SC-MCCH within a time with the subscript of K + K (i-1), wherein K =1,2, …, K, i =1, …, M and M are integers, and the maximum value is M. K is the number of beams adopted during SS/PBCH Block transmission in the NR cell. The K beams used in the SC-MCCH transmission are the same as the K beams used by the SS/PBCH Block. When the SC-PTM configuration information needs to be transmitted in segments, M is the maximum number of segments.

When the SC-MCCH is transmitted in each of the above-mentioned occasions, time domain resources and frequency domain resources need to be allocated to the PDSCH corresponding to the SC-MCCH in the corresponding occasion. The time-frequency resource allocation information is represented by a DCI format, preferably represented by DCI formats 1-0. And in each time machine, sending the PDSCH corresponding to the SC-MCCH through the allocated time-frequency resources. And the distribution information of the time-frequency resources adopted by the PDSCH corresponding to the SC-MCCH in each time machine forms SC-MCCH dynamic scheduling information of the corresponding time.

In order to enable the UE to receive the PDSCH corresponding to the SC-MCCH, the scheduling information of the SC-MCCH needs to be broadcasted in the cell based on the above scheme. Specifically, the SC-MCCH scheduling information in the present application includes: SC-MCCH semi-static configuration information and SC-MCCH dynamic scheduling information.

Fig. 2 is a flowchart illustrating a method for sending SC-MCCH scheduling information in an NR cell according to an embodiment of the present invention, where the method may be executed by a base station gNB. As shown in fig. 2, the method of this embodiment may include:

s201: and broadcasting SC-MCCH semi-static configuration information through SIB1 or newly-added SIB.

Specifically, by newly adding SIB to broadcast the SC-MCCH semi-static configuration information, or by broadcasting the SC-MCCH semi-static configuration information via SIB1, the UE may obtain corresponding information by receiving the corresponding SIB, and perform the following corresponding processing: the UE determines a CORESET and a search space corresponding to the PDCCH scrambled by the SC-RNTI for the CRC according to CORESET configuration information and search space configuration information in the SC-MCCH semi-static configuration information in the SIB, and can monitor the PDCCH scrambled by the SC-RNTI for the CRC in the corresponding search space. The SC-RNTI is used for identifying SC-MCCH or SC-PTM configuration information in the NR cell.

In addition, the UE may narrow the time domain range for monitoring the PDCCH according to the semi-static time domain configuration information in the SC-MCCH semi-static configuration information in the SIB, and is limited to monitoring the corresponding PDCCH in the required search space in the corresponding occasion.

S202: and in the NR cell, sending SC-MCCH dynamic scheduling information corresponding to corresponding occasions aiming at all the occasions allocated to the PDSCH corresponding to the SC-MCCH, wherein the SC-MCCH dynamic scheduling information comprises time-frequency resource allocation information allocated to the PDSCH corresponding to the SC-MCCH in the corresponding time, and the time-frequency resource allocation information is represented by a DCI format.

Preferably, the time-frequency resource allocation information is represented by DCI format 1-0.

By adopting the scheme, SC-MCCH semi-static configuration information can be broadcasted through SIB1 or newly-added SIB, and SC-MCCH dynamic scheduling information corresponding to each time allocated to PDSCH corresponding to SC-MCCH is sent in an NR cell, so that SC-MCCH scheduling information is broadcasted in the cell in a 5G system.

Based on the method of fig. 2, the present specification also provides some specific embodiments of the method, which are described below.

In a specific embodiment, the SC-MCCH semi-static configuration information includes: controlling resource set CORESET configuration information, search space configuration information and SC-MCCH semi-static time domain configuration information, wherein the SC-MCCH semi-static time domain configuration information comprises the following steps: and sending the configuration information of the BWP of the SC-MCCH and the SC-MCCH broadcast parameters.

Wherein the configuration information of the BWP for transmitting SC-MCCH comprises: BWP ID and frequency domain resources occupied by BWP.

The SC-MCCH broadcast parameter is used to determine each opportunity for transmitting the PDSCH corresponding to the SC-MCCH in each repetition period in a modification period, and specifically includes: modifying the cycle length A, the repetition cycle length B, the parameters for determining the starting position and the number of segments m. It is also possible to carry not the number of segments M but the maximum number of segments M in the SC-MCCH broadcast parameters. A fixed value can be allocated to the maximum segment number M of the SC-MCCH in the NR cell in the 3GPP protocol, and when M is a fixed value in the 3GPP protocol, the SC-MCCH broadcast parameters may not carry either the segment number M or the maximum segment number M.

And determining the initial position of the PDSCH corresponding to the SC-MCCH to be sent in each repetition period according to the parameters of modifying the period length A, the repetition period length B and determining the initial position in the SC-MCCH broadcast parameters. And determining the number K m of the occasions for continuously transmitting the PDSCH corresponding to the SC-MCCH from the initial position in each repetition period according to the segmentation number m. And determining the maximum opportunity number K M of the PDSCH corresponding to the SC-MCCH continuously transmitted from the starting position in each repetition period according to the maximum segment number M. And in each occasion for sending the PDSCH corresponding to the SC-MCCH in each repetition period in one modification period, the distribution information of the time-frequency resources distributed to the PDSCH corresponding to the SC-MCCH forms SC-MCCH dynamic scheduling information of the corresponding occasion. The information is represented by a DCI format, preferably, DCI formats 1-0. In each time of allocating the PDSCH corresponding to the SC-MCCH, the time-frequency resources used by the PDSCH corresponding to the SC-MCCH in the corresponding time may be different. Specifically, the PDSCH corresponding to the SC-MCCH in each timeslot is sent in the corresponding direction using the corresponding beam, and the SC-MCCH dynamic scheduling information corresponding to the timeslot needs to be sent in the same direction using the same beam.

The SC-MCCH dynamic scheduling information corresponding to each opportunity can be carried only through DCI format on PDCCH scrambled by SC-RNTI of CRC sent in one corresponding time machine. Preferably, the DCI format is DCI format 1-0, and in order to enable the UE to receive the PDCCH, the UE needs to broadcast the search space corresponding to the PDCCH and configuration information of the CORESET to the UE, so that the UE monitors the PDCCH scrambled by the SC-RNTI for the CRC in the corresponding search space on the corresponding CORESET to capture SC-MCCH dynamic scheduling information indicated by the DCI format on the PDCCH, and receives the PDSCH corresponding to the SC-MCCH in a corresponding time according to the SC-MCCH dynamic scheduling information to obtain SC-PTM configuration information carried on the SC-MCCH.

In a specific embodiment, the method may further include:

and in the NR cell, when the SC-MCCH semi-static configuration information is sent by adopting a newly added SIB, the newly added SIB is sent in the cell as required.

Specifically, in the NR cell, each SIB may be broadcast in the cell or may be transmitted as needed, in addition to SIB 1. Therefore, when the SC-MCCH semi-static configuration information is broadcasted by using a new SIB, the new SIB may be broadcasted in a cell or may be sent as needed. Namely: when the SIB1 indicates to broadcast the SIB, the SC-MCCH semi-static configuration information is broadcasted through the newly-added SIB; when the SIB1 indicates that the SIB is not broadcasted, providing the configuration information of the PRACH resource corresponding to the SIB through the SIB 1. And when the UE needs to know the newly added SIB, initiating a random access process according to the configuration information of the PRACH resource corresponding to the SIB in the SIB1, and requesting the gNB to send the newly added SIB to the UE.

In a specific embodiment, as shown in fig. 3, a flow diagram of a method for sending SC-MCCH scheduling information in an NR cell according to another embodiment of the present invention is provided, where sending SC-MCCH dynamic scheduling information corresponding to a corresponding time in the NR cell may include:

s301: and configuring a search space and a CORESET corresponding to the PDCCH, wherein for each occasion of sending the PDSCH corresponding to the SC-MCCH, the PDCCH is used for carrying SC-MCCH dynamic scheduling information corresponding to the occasion, the CRC of the PDCCH is scrambled by SC-RNTI, and the SC-RNTI is used for identifying the only SC-MCCH or SC-PTM configuration information of a cell.

Specifically, configuring the search space and the CORESET corresponding to the PDCCH includes: determining a BWP for transmitting SC-MCCH dynamic scheduling information, and configuring a search space and a CORESET corresponding to a PDCCH on the BWP.

Preferably, the SC-MCCH dynamic scheduling information is sent on a BWP that sends the SC-MCCH, and the search space and the CORESET corresponding to the PDCCH are configured on the BWP.

The BWP for transmitting the SC-MCCH dynamic scheduling information may also be determined in the following manner, and a search space and a CORESET corresponding to the PDCCH may be configured on the BWP.

The first method is as follows: and the gNB determines the BWP for transmitting the SC-MCCH dynamic scheduling information in the current NR cell.

The second method comprises the following steps: a network element or an entity determines a BWP for sending SC-MCCH dynamic scheduling information, and each cell controlled by each gNB connected with the network element or the entity sends the SC-MCCH dynamic scheduling information by adopting the BWP. For example, the core network determines BWP for transmitting SC-MCCH dynamic scheduling information. For another example, an entity is added between the core network and the gNB to determine BWP for transmitting the SC-MCCH dynamic scheduling information.

The third method comprises the following steps: and the gNB CU determines a BWP for sending the SC-MCCH dynamic scheduling information, and each cell controlled by each gNB DU connected with the gNB CU sends the SC-MCCH dynamic scheduling information by adopting the BWP.

S302: after time frequency resources are successfully allocated to PDSCHs corresponding to SC-MCCH carrying each SC-PTM configuration information segment, determining time slot subscripts of K PDCCH occasions corresponding to each segment for each segment according to the time slot subscripts of K occasions corresponding to each segment, and uniformly allocating or respectively allocating Control Channel Element (CCE) resources for the PDCCH transmitted in the K PDCCH occasions, wherein for each occasion in the K occasions, the time slot subscripts of the PDCCH occasions corresponding to each occasion are determined by the K0 adopted by the PDSCH in each occasion and the time slot subscript of the occasion, the K0 is the timing difference between the PDSCH transmitted in one occasion and the PDCCH carrying dynamic scheduling information of the PDSCH of the occasion, the unit is a time slot, the K0> =0 is used for indicating that the PDCCH is transmitted before the PDSCH or is transmitted simultaneously with the PDSCH, the value of the K0 is determined when the time domain resources are allocated to the PDSCH in one occasion, and the K is the number of beams adopted by SS/PBCH blocks in a current NR cell. And when the number of the SC-PTM configuration information segments is 1, the SC-PTM configuration information on the SC-MCCH does not need to be sent in segments. Otherwise, the SC-PTM configuration information on the SC-MCCH is sent in a segmentation way.

In the resource allocation, CCE resources may be allocated to PDCCH occasions corresponding to all segments in a unified manner, so that PDCCHs scrambled by SC-RNTI for CRC are transmitted using the same CCE resource at PDCCH occasions corresponding to all segments.

And after the K PDCCH occasions corresponding to the segments are uniformly or respectively allocated with the CCE resources successfully, executing the next step.

Specifically, for each segment, determining the time slot index of K PDCCH occasions corresponding to each segment according to the time slot index of K occasions corresponding to each segment, and allocating control channel element CCE resources to PDCCHs transmitted within the K PDCCH occasions in a unified manner or respectively, includes: and determining the time slot subscripts of K PDCCH occasions corresponding to each segment in a search space corresponding to the PDCCH on the BWP for transmitting the SC-MCCH dynamic scheduling information, and uniformly or respectively allocating control channel element CCE resources for the PDCCHs transmitted in the K PDCCH occasions in the search space.

The specific implementation method of step S302 is as follows:

when CCE resources are uniformly distributed for K PDCCH occasions corresponding to each segment, determining a starting CCE subscript corresponding to the uniformly distributed CCE resources and an adopted aggregation level L. The starting subscripts of CCEs occupied by the PDCCH in each opportunity are the same, and the adopted aggregation levels L are the same. In K PDCCH timers, a base station occupies continuous L CCEs from the CCE corresponding to the initial CCE subscript to transmit the PDCCH. When CCE resources are independently allocated to the PDCCH in each occasion, a starting CCE index and an aggregation level L corresponding to the CCE resources allocated to the PDCCH are determined in each occasion, respectively. In different time frames, the initial CCE subscripts used by the PDCCH may be different, and the aggregation levels used by the PDCCH may be different. In each time machine, the base station transmits the corresponding PDCCH through the CCE resources allocated to the PDCCH in the corresponding time machine. In the resource allocation, CCE resources may also be allocated to PDCCH occasions corresponding to all segments in a unified manner, so that the PDCCHs are transmitted by using the same CCE resource at the PDCCH occasions corresponding to all segments.

And after the CCE resources are successfully allocated to the K PDCCH occasions corresponding to the segments, executing the next step.

S303: for each segment, respectively adopting K wave beams to transmit PDCCH scrambled by SC-RNTI for CRC in K PDCCH occasions corresponding to the segment, wherein the PDCCH adopts distributed CCE resources to transmit in each PDCCH occasion, and the DCI format carried on the PDCCH is SC-MCCH dynamic scheduling information of corresponding occasions, wherein the K wave beams adopted when the PDCCH is transmitted in the K PDCCH occasions corresponding to each segment are the same as the K wave beams adopted when a cell SS/PBCH block is transmitted, the wave beams adopted when the PDCCH is transmitted in each PDCCH occasion are the wave beams adopted when the PDSCH is transmitted in corresponding occasions, and corresponding processing is carried out on the PDCCH before the PDCCH is transmitted in each PDCCH occasion.

Preferably, the DCI format is DCI format 1-0.

Specifically, for each segment, the method for transmitting the PDCCH scrambled by the SC-RNTI for the CRC by using K beams in K PDCCH occasions corresponding to the segment, and for transmitting the PDCCH by using the allocated CCE resource in each PDCCH occasion includes: in a search space corresponding to a PDCCH on a BWP for transmitting SC-MCCH dynamic scheduling information, for each segment, transmitting the PDCCH scrambled by SC-RNTI for CRC by adopting K beams in K PDCCH occasions corresponding to the segment, and transmitting the PDCCH by adopting allocated CCE resources in each PDCCH occasion.

In the above step 303, before the PDCCH is transmitted at each PDCCH occasion, performing corresponding processing on the PDCCH includes:

the processing procedure of the PDCCH bearing the SC-MCCH scheduling information in the physical layer is the same as the processing procedure of the PDCCH bearing the ordinary service scheduling information in the physical layer. Specifically, the processing, by the physical layer, of the DCI format on the PDCCH carrying the SC-MCCH scheduling information includes: bit scrambling, modulation and physical resource mapping. However, the SC-MCCH scheduling information needs to be broadcast to the UEs in the cell through the PDCCH, and in order for the UEs in the cell to decode the PDCCH, some special processing needs to be performed in the processing procedure of the PDCCH by the physical layer. The method comprises the following specific steps:

when bit scrambling is performed on a PDCCH carrying SC-MCCH scheduling information, and an initialization value of a pseudorandom sequence generator is determined according to the following formula, parameters in the following formula need to be set by using a value determined by the invention or according to a mode given by the invention:

c _init ＝(n _RNTI ·2 ¹⁶ +n _ID )mod2 ³¹ ，

in the above formula, n _ID Scrambling ID, n for PDCCH _RNTI RNTI adopted for the UE as the receiving side.

In the present invention, n _ID Configured in one of the following ways:

the first method is as follows:

，

is the physical layer cell ID of the cell.

The second method comprises the following steps: and uniformly configuring PDCCH scrambling IDs for PDCCHs bearing SC-MCCH scheduling information in each cell, and carrying out bit scrambling on the PDCCHs bearing the SC-MCCH scheduling information in all the cells by adopting the value.

The third method comprises the following steps: configuring a fixed value as PDCCH scrambling ID (identity), preferably n, for PDCCH carrying SC-MCCH scheduling information in NR (non-random access channel) cell in 3GPP protocol _ID ＝0。

Preferably, the third method is adopted, and n is set _ID ＝0。

In the invention, PDCCH bearing SC-MCCH scheduling information is broadcasted in a cell, and no specific receiving party UE exists _RNTI ：

The first method is as follows: n is a radical of an alkyl radical _RNTI ＝0

The second method comprises the following steps: setting n _RNTI The value of (a) is SC-RNTI which is used for configuring information on an empty identifier SC-MCCH or SC-PTM _RNTI The value of (2) is SC-RNTI used for bearing PDCCH of SC-MCCH scheduling information on an empty identifier.

The process for generating the DMRS of the PDCCH for bearing the SC-MCCH scheduling information is the same as the process for generating the DMRS of the PDCCH for bearing the common service scheduling information, and the process comprises the following steps: DMRS sequences are generated and mapped to physical resources. Since the PDCCH carrying the SC-MCCH scheduling information is broadcasted to all UEs in the cell, in order to enable all UEs to decode the PDCCH, the following special processing needs to be performed in the DMRS generation process of the PDCCH:

when the initialization of the pseudo-random sequence generator is determined according to the following formula, the parameters in the following formula are set with the values determined by the present invention or in the manner given by the present invention:

wherein,

for the number of symbols included in one slot,

index of time slot in a radio frame when SCS parameter of NR cell is u, l is index of symbol in a time slot, N _ID Epsilon {0,1, … …,65535} is the scrambling ID of PDCCH DMRS.

N may be determined in one of the following ways _ID The value of (A) is as follows:

the method I comprises the following steps:

the second method comprises the following steps: allocation of N to DMRS of PDCCH bearing SC-MCCH scheduling information in cell _ID 。

The third method comprises the following steps: giving N in 3GPP protocol _ID A fixed value is assigned. Preferably, N _ID ＝0。

In step S301, the search space and the CORESET corresponding to the PDCCH carrying the SC-MCCH scheduling information are configured as follows.

In order to enable all UEs in a cell to receive SC-MCCH scheduling information, a search space and a CORESET corresponding to a PDCCH carrying the SC-MCCH scheduling information are first defined. The method comprises the following specific steps:

and scrambling CRC of the PDCCH bearing the SC-MCCH scheduling information by using SC-RNTI, wherein the type of a search space corresponding to the PDCCH is as follows: common (Common), a Common Search Space corresponding to the PDCCH is represented by CSS-C (Common Search Space for SC-MCCH, common Search Space corresponding to SC-MCCH), and CORESET corresponding to the Common Search Space is represented by CORESET-C.

The aggregation level L adopted by CSS-C on CORESET-C and the total number N (L) of PDCCH candidates under each aggregation level are shown in Table 1. In table 1, L =1,2,4,8, 16. Since CSS-C is a common search space and a corresponding PDCCH is broadcast in a cell, an aggregation level L =1 or L =2 is difficult to adopt in an actual scene of transmitting the PDCCH. Thus, CSS-C may preferably employ the aggregation level L =4,8, 16. No specific convention is made for N (L) in the present invention.

TABLE 1 aggregation level L vs. total number N (L) of PDCCH candidates under each aggregation level

In the NR cell, the entire system bandwidth is divided into a plurality of BWPs. The only SC-MCCH in a cell may be transmitted in the initial BWP or in other BWPs. Accordingly, a cell has a unique CSS-C. And appointing the BWP and the adopted air interface resource for the CORESET-C corresponding to the CSS-C. The CORESET-C can be in the same BWP with SC-MCCH or in different BWP. Preferably, CORESET-C and SC-MCCH are in the same BWP, and the BWP is the initial BWP.

In order to satisfy the condition that the PDCCH bearing the SC-MCCH scheduling information is broadcasted in the whole cell, the CSS-C and the corresponding CORESET-C are configured in the following mode.

The configuration information of CORESET-C comprises the following contents:

CORESET subscript: the subscript definition may be one of the following:

the first method is as follows: numbering of CORESET-C among all CORESETs within a cell.

The second method comprises the following steps: the number of CORESET-C in all CORESETs defined within the current BWP.

Length of PDCCH occasion: the total number of continuous symbols occupied by PDCCH Occasion has a value range as follows: 1,2,3.

And setting the frequency resources occupied by the CORESET, wherein the frequency resources occupied by the CORESET are represented by a group of RBs.

Mapping mode from CCE to REG: non-interleaved mapping or interleaved mapping.

The mapping manner of CCE to REG may be specified in the 3GPP protocol or indicated by a parameter as non-interleaved mapping or interleaved mapping.

When specified in the 3GPP protocol: the mapping mode from CCE to REG in CORESET-C is as follows: when mapping is carried out in a non-interleaving manner or in an interleaving manner, corresponding parameters do not need to be carried in the configuration information of the CORESET-C, and the configuration information is used for indicating the mapping mode from CCE to REG.

When the mapping manner from CCE to REG in CORESET-C is indicated by the parameter, the mapping manner from CCE to REG adopted by CORESET-C needs to be indicated by the parameter of 1 bit in the configuration information. When this parameter is not configured, by default: no interleaving mapping is used.

When the CORESET-C adopts the interleaving mapping, the configuration information of the CORESET-C needs to carry: length L of REG bundle, interleaving depth R and offset n of interleaver _shift Wherein, the length L of the REG bundle is the number of REGs included in each REG bundle, and the interleaving depth R is: the interleaver includes a number of rows. When n is not configured _shift When, default is:

the following may be specified in the 3GPP protocol: and when the interleaving mapping mode is adopted and L and R are not configured, default values of the L and the R are set. Preferably, by default: l =6, R =2.

The configuration information of CSS-C includes the following:

search space subscript: the subscript definition may be one of the following:

the first method is as follows: numbering of CSS-C in all SSs within a cell.

The second method comprises the following steps: number of CSS-C in all SSs defined within the BWP in which CSS-C resides.

The third method comprises the following steps: the numbering of CSS-C in all CSS defined within the BWP in which CSS-C resides.

Corresponding CORESET subscript: subscript of CORESET-C, CSS-C is mapped to CORESET indicated by the subscript.

PDCCH monitoring period k _s (unit slot) and PDCCH monitoring offset o _s 。

PDCCH monitoring mode: the subscript of the first symbol of CORESET-C in the time slot for monitoring the PDCCH, and the subscript of the first symbol of CORESET-C in the time slot for monitoring the PDCCH and the length of PDCCH occupancy in the CORESET-C configuration information jointly determine the specific position of each PDCCH occupancy.

The number of time slots for which the search space lasts in one monitoring period: t is _s <k _s 。

The number N (L) of PDCCHs of aggregation level L to be detected in each PDCCH detection time, wherein L =1,2,4,8, 16. Preferably, L takes the values: l =4,8, 16.

Search space type: COMMON.

The search space needs to be monitored for the RNTI and DCI formats: see table 2. In table 2, the CRC of the PDCCH is scrambled by SC-RNTI, and the initialization value of the scrambling sequence generator of the PDSCH is generated based on SC-RNTI.

Table 2: PDCCH and PDSCH defined by SC-RNTI

According to the CSS-C configuration information, in each PDCCH monitoring period, the frame number n corresponding to the first PDCCH opportunity _f And time slot number

Determined according to the following formula:

wherein,

the time slot number of a radio frame is represented when the SCS parameter of the PDCCH is mu, starting from the first PDCCH opportunity in the PDCCH monitoring period, the PDCCH opportunities in the PDCCH monitoring period are numbered according to the time sequence, and the total number is T _s Each time, the time number is from 0 to T _s -1。

For CSS-C with index s mapped to CORESET-C with index p, CCE indexes occupied by candidate PDCCHs at each aggregation level are defined as shown in the following expression:

is the number of PDCCH candidates with aggregation level L in CSS-C.

The relation between the search space and CORESET corresponding to the PDCCH bearing the SC-MCCH scheduling information and the search space and CORESET existing in the NR cell defined in the 3GPP protocol is as follows:

in general, the common search space configured in the NR cell includes: TYPE 0CSS, TYPE 0A CSS, TYPE 1CSS, TYPE 2CSS, and TYPE 3CSS.

The TYPE 0CSS is mapped to CORESET 0, and the other CSS can be mapped to CORESET 0 or other CORESETs.

In the invention, the CORESET-C can share the same time-frequency resource with the CORESET 0, and when the CORESET-C shares the same time-frequency resource with the CORESET 0, the CSS-C mapped to the CORESET-C is equivalent to the CSS-C mapped to the CORESET 0. The PDCCH opportunity on CORESET 0 under different SS/PBCH Block and CORESET multiplexing modes is defined in 3GPP protocol TS 38.213, chapter 13. The PDCCH opportunity cycle on CORESET 0 corresponds to K SS/PBCH blocks: SS/PBCH Block with subscript 0 to subscript (K-1). And the wave beam adopted during PDCCH transmission on each PDCCH opportunity is the same as the wave beam adopted by the corresponding SS/PBCH Block.

In the present invention, for CSS-C mapped to CORESET 0, the definition of PDCCH timing on this CSS-C follows the existing definition of PDCCH timing on CORESET 0.

When other types of common search spaces are mapped to the CORESET other than CORESET 0, the CORESET-C in the invention can share the same time-frequency resources with the CORESET corresponding to other types of common search spaces. In this scenario, CSS-C mapping to CORESET-C is equivalent to mapping to CORESET corresponding to other types of common search spaces. In this scenario, the corresponding CORESET uses only one set of configuration parameters, which applies to all common search spaces mapped onto the CORESET at the same time. However, each common search space mapped to the CORESET has a corresponding set of configuration parameters, and the set of parameters used in each common search space may be identical or different. Each common search space uses the same set of parameters as those included in the configuration information of the above-described CSS-C.

When CSS-C is mapped onto CORESET 0, the invention proposes: whether CSS-C of the current cell is mapped to CORESET 0 is indicated with 1 bit on PBCH. When the bit is 1, CSS-C is mapped to CORESET 0; when the bit is 0, CSS-C is not mapped to CORESET 0.

Further, the meanings of acronyms referred to in this scheme can be referred to in the summary in table 3.

TABLE 3 English meaning comparison table

Based on the same idea, an embodiment of the present specification further provides a device corresponding to the foregoing method, and fig. 4 is a schematic structural diagram of a device for sending SC-MCCH scheduling information in an NR cell according to an embodiment of the present invention, where the single-cell multicast control channel SC-MCCH scheduling information includes SC-MCCH semi-static configuration information and SC-MCCH dynamic scheduling information, and as shown in fig. 4, the device may include:

a broadcasting module 401, configured to broadcast the SC-MCCH semi-static configuration information through SIB1 or a newly added SIB.

A sending module 402, configured to send, in an NR cell, SC-MCCH dynamic scheduling information corresponding to each time allocated to a PDSCH corresponding to an SC-MCCH, where the SC-MCCH dynamic scheduling information includes time-frequency resource allocation information allocated to a PDSCH of a physical downlink shared channel corresponding to the SC-MCCH in the corresponding time, and the time-frequency resource allocation information is represented by a DCI format.

In a specific embodiment, the SC-MCCH semi-static configuration information includes: controlling resource set CORESET configuration information, search space configuration information and SC-MCCH semi-static time domain configuration information, wherein the SC-MCCH semi-static time domain configuration information comprises: and sending the configuration information of the BWP of the SC-MCCH and the SC-MCCH broadcast parameters.

In a specific embodiment, the broadcasting module is further configured to:

In a specific embodiment, the sending module is further configured to:

and configuring a search space and a CORESET corresponding to the PDCCH, wherein for each time for sending the PDSCH corresponding to the SC-MCCH, the PDCCH is used for carrying SC-MCCH dynamic scheduling information corresponding to the time, the CRC of the PDCCH is scrambled by SC-RNTI, and the SC-RNTI is used for identifying the only SC-MCCH or SC-PTM configuration information of a cell.

After time frequency resources are successfully allocated to PDSCHs corresponding to SC-MCCH carrying each SC-PTM configuration information segment, for each segment, according to K0 adopted in PDSCH time domain resource allocation by PDSCH corresponding to each segment and K time slot subscripts corresponding to corresponding SC-MCCH segments, determining the time slot subscripts of K PDCCH occasions corresponding to each segment, and uniformly allocating or respectively allocating Control Channel Element (CCE) resources for PDCCH transmitted in the K PDCCH occasions, wherein for each occasion in the K occasions, the K0 adopted by PDSCH in each occasion and the time slot subscript of the occasion determine the time slot subscript of the PDCCH occasion corresponding to the occasion, the K0 is a timing difference between PDSCH transmitted in one occasion and PDCCH carrying dynamic scheduling information of PDSCH of the occasion, the unit is a time slot, the K0> =0 is used for indicating that the PDSCH is transmitted prior to the PDSCH or is transmitted simultaneously with the PDSCH, and the value of the K0 is determined when the time domain resources are allocated to one occasion, the K is a value of SS/PBCH number of PTCH blocks in a current NR cell, wherein the beam configuration is not required to transmit the SC-MCCH information segments, and the SC-MCCH information is configured on SC-SC.

For each segment, respectively adopting K wave beams to transmit PDCCH scrambled by SC-RNTI for CRC in K PDCCH occasions corresponding to the segment, wherein the PDCCH adopts distributed CCE resources to transmit in each PDCCH occasion, and the DCI format carried on the PDCCH is SC-MCCH dynamic scheduling information of corresponding occasions, wherein the K wave beams adopted when the PDCCH is transmitted in the K PDCCH occasions corresponding to each segment are the same as the K wave beams adopted when a cell SS/PBCH block is transmitted, the wave beams adopted when the PDCCH is transmitted in each PDCCH occasion are the wave beams adopted when the PDSCH is transmitted in corresponding occasions, and corresponding processing is carried out on the PDCCH before the PDCCH is transmitted in each PDCCH occasion.

In a specific embodiment, the sending module is further configured to:

when bit scrambling is performed on a PDCCH carrying SC-MCCH scheduling information, an initialization value of a pseudo-random sequence generator is determined according to the following formula, and parameters in the following formula need to be set by adopting a value determined by the invention or according to a mode given by the invention:

c _init ＝(n _RNTI ·2 ¹⁶ +n _ID )mod2 ³¹ wherein n is _ID Scrambling ID, n for PDCCH _RNTI An RNTI employed for the UE as a receiver; n is _ID Configured in any of the following ways:

is the physical layer cell ID of the cell.

And uniformly configuring PDCCH scrambling IDs for PDCCHs bearing SC-MCCH scheduling information in each cell, and carrying out bit scrambling on the PDCCHs bearing the SC-MCCH scheduling information in all the cells by adopting the value.

Or configuring a fixed value as PDCCH scrambling ID for PDCCH bearing SC-MCCH scheduling information in an NR cell in a 3GPP protocol.

n _RNTI The setting is performed in any of the following ways:

n _RNTI ＝0。

setting n _RNTI The value of (a) is SC-RNTI which is used for configuring information on an empty identifier SC-MCCH or SC-PTM _RNTI The value of (2) is SC-RNTI used for bearing PDCCH of SC-MCCH scheduling information on an empty identifier.

Performing the following processing on the generation process of the DMRS of the PDCCH carrying the SC-MCCH scheduling information:

the initialization value of the pseudo-random sequence generator is determined according to the following formula, and the parameters in the following formula need to be set by the values determined by the present invention or in the manner given by the present invention:

wherein,

for the number of symbols included in one slot,

N _ID the setting is performed in any of the following ways:

allocation of N to DMRS of PDCCH bearing SC-MCCH scheduling information in cell _ID 。

Or to N in 3GPP protocols _ID A fixed value is assigned.

In a specific embodiment, the sending module is further configured to:

and scrambling CRC of the PDCCH bearing the SC-MCCH scheduling information by using SC-RNTI, wherein the type of a search space corresponding to the PDCCH is as follows: and a common type, wherein CSS-C is used for representing a common search space corresponding to the PDCCH, and CORESET corresponding to the common search space is represented by CORESET-C.

Polymerization grade L =1,2,4,8 or 16 adopted by CSS-C on CORESET-C.

In the NR cell, the whole system bandwidth is divided into a plurality of BWPs, a unique SC-MCCH in the cell is transmitted in the initial BWP or in other BWPs, wherein the cell has a unique CSS-C, the BWP where the cell is located and the empty resources adopted are designated for the CORESET-C corresponding to the CSS-C, and the CORESET-C and the SC-MCCH are in the same BWP.

In a specific embodiment, the sending module is further configured to:

and configuring the CSS-C and a CORESET-C corresponding to the CSS-C in order to meet the requirement that the PDCCH bearing the SC-MCCH scheduling information is broadcasted in the whole cell.

In a specific embodiment, the sending module is further configured to:

the CORESET subscript is set by the number of CORESET-C in all CORESETs in the cell, or the number of CORESET-C in all CORESETs defined in the current BWP.

Setting the length of the PDCCH opportunity as the total number of continuous symbols occupied by PDCCH Ocvasion, wherein the value of the total number of continuous symbols occupied by PDCCH Ocvasion is as follows: 1,2 or 3.

The mapping mode from CCE to REG is specified in the 3GPP protocol or indicated by parameters as non-interleaved mapping or interleaved mapping.

When the 3GPP protocol specifies that the mapping manner from CCE to REG in CORESET-C is: when mapping is carried out in a non-interleaving manner or in an interleaving manner, corresponding parameters do not need to be carried in the configuration information of the CORESET-C, and the configuration information is used for indicating the mapping mode from CCE to REG.

When the mapping mode from CCE to REG in CORESET-C is indicated through the parameters, the mapping mode from CCE to REG adopted by CORESET-C is indicated through the parameters of 1 bit in the configuration information, and when the parameters are not configured, the default is as follows: no interleaving mapping is used.

When the CORESET-C adopts the interleaving mapping, the configuration information of the CORESET-C needs to carry: length L of REG bundle, interleaving depth R and offset n of interleaver _shift Wherein, the length L of the REG bundle is the number of REGs included in each REG bundle, and the interleaving depth R is: the interleaver includes a number of rows, when n is not configured _shift Then, default is as follows:

the 3GPP protocol specifies: when the interleaving mapping mode is adopted and L and R are not configured, the default values of L and R are set as follows: l =6, R =2.

In a specific embodiment, the sending module is further configured to:

the index of the search space is defined by the number of CSS-C in all SSs within the cell, the number of CSS-C in all SSs defined within the BWP in which CSS-C is located, or the number of CSS-C in all CSS defined within the BWP in which CSS-C is located.

Setting the corresponding CORESET subscript: subscript of CORESET-C, and mapping CSS-C to CORESET indicated by the subscript.

And setting a PDCCH monitoring period and PDCCH monitoring bias, wherein the unit of the monitoring period is a time slot.

Setting a monitoring mode of the PDCCH as a subscript of a first symbol of CORESET-C in a time slot for monitoring the PDCCH, wherein the subscript of the first symbol of CORESET-C in the time slot for monitoring the PDCCH and the length of PDCCH Ocvasion in CORESET-C configuration information jointly determine the specific position of each PDCCH Ocvasion.

Setting the number of time slots for which the search space lasts in one monitoring period: t is _s <k _s 。

The number N (L) of PDCCHs of aggregation level L to be detected in each PDCCH detection time, wherein L =1,2,4,8, 16.

The search space type is set to COMMON.

And setting RNTI and DCI formats to be monitored in a search space, wherein CRC of the PDCCH is scrambled by SC-RNTI, and an initialization value of a scrambling sequence generator of the PDSCH is generated according to the SC-RNTI.

In a specific embodiment, the sending module is further configured to:

according to the configuration information of CSS-C, the frame number n corresponding to the first PDCCH opportunity in each PDCCH monitoring period _f And time slot number

Determined by the following expression:

wherein,

the time slot number of a radio frame when the SCS parameter of the PDCCH is mu is represented, starting from the first PDCCH opportunity in the PDCCH monitoring period, numbering each PDCCH opportunity in the PDCCH monitoring period according to the time sequence, and countingHas a total of T _s Each time, the time number is from 0 to T _s -1。

For CSS-C with index s mapped to CORESET-C with index p, CCE occupied by candidate PDCCH under each aggregation level is defined by the following expression:

wherein L is polymerization grade, i =0, …, L-1,N _CCE,p Subscript range for CCE in CORESET-M, which is the total number of CCEs in CORESET-C with subscript p: 0 to N _CCE,p -1，m _s Is a subscript of a PDCCH candidate of aggregation level L,

is the number of PDCCH candidates with aggregation level L in CSS-C.

In a specific embodiment, the sending module is further configured to:

when the CSS-C is mapped to CORESET 0, it is indicated on PBCH with 1 bit whether the CSS-C of the current cell is mapped to CORESET 0, wherein when the bit is 1, the CSS-C is mapped to CORESET 0, and when the bit is 0, the CSS-C is not mapped to CORESET 0.

The apparatus provided in the embodiment of the present invention may implement the method in the embodiment shown in fig. 2, and the implementation principle and the technical effect are similar, which are not described herein again.

Fig. 5 is a schematic hardware structure diagram of a device for sending SC-MCCH scheduling information in an NR cell according to an embodiment of the present invention. As shown in fig. 5, the present embodiment provides an apparatus 500 including: at least one processor 501 and memory 502. The processor 501 and the memory 502 are connected by a bus 503.

In a specific implementation, the at least one processor 501 executes the computer-executable instructions stored in the memory 502, so that the at least one processor 501 executes the method in the above-described method embodiments.

For a specific implementation process of the processor 501, reference may be made to the above method embodiments, which implement the similar principle and technical effect, and this embodiment is not described herein again.

In the embodiment shown in fig. 5, it should be understood that the Processor may be a Central Processing Unit (CPU), other general purpose processors, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the present invention may be embodied directly in a hardware processor, or in a combination of the hardware and software modules within the processor.

The memory may comprise high speed RAM memory and may also include non-volatile storage NVM, such as at least one disk memory.

The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, the buses in the figures of the present application are not limited to only one bus or one type of bus.

An embodiment of the present invention further provides a computer-readable storage medium, where a computer execution instruction is stored in the computer-readable storage medium, and when a processor executes the computer execution instruction, the method for sending SC-MCCH scheduling information in an NR cell according to the foregoing method embodiment is implemented.

The computer-readable storage medium may be implemented by any type of volatile or non-volatile storage device or combination thereof, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disk. Readable storage media can be any available media that can be accessed by a general purpose or special purpose computer.

An exemplary readable storage medium is coupled to the processor such the processor can read information from, and write information to, the readable storage medium. Of course, the readable storage medium may also be an integral part of the processor. The processor and the readable storage medium may reside in an Application Specific Integrated Circuits (ASIC). Of course, the processor and the readable storage medium may also reside as discrete components in the apparatus.

Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sending method of SC-MCCH scheduling information in an NR cell is characterized in that the SC-MCCH scheduling information of a single-cell multicast control channel comprises SC-MCCH semi-static configuration information and SC-MCCH dynamic scheduling information, and the method comprises the following steps:

broadcasting SC-MCCH semi-static configuration information through SIB1 or newly-added SIB;

in a new radio access technology (NR) cell, sending SC-MCCH dynamic scheduling information corresponding to corresponding occasions aiming at all occasions allocated to PDSCH corresponding to SC-MCCH, wherein the SC-MCCH dynamic scheduling information comprises time-frequency resource allocation information allocated to PDSCH corresponding to SC-MCCH in the corresponding occasions, and the time-frequency resource allocation information is represented by a Downlink Control Information (DCI) format;

the sending of the SC-MCCH dynamic scheduling information corresponding to the corresponding occasion in the NR cell includes:

configuring a search space and a CORESET corresponding to a PDCCH (physical downlink control channel), wherein for each time for sending a PDSCH (physical downlink shared channel) corresponding to an SC-MCCH (single cell-multicast control channel), the PDCCH is used for carrying SC-MCCH dynamic scheduling information corresponding to the time, the CRC (cyclic redundancy check) of the PDCCH is scrambled by an SC-RNTI (single cell-radio network temporary identifier), and the SC-RNTI is used for identifying the only SC-MCCH or SC-PTM (single cell-multicast control channel) configuration information of a cell;

after time-frequency resources are successfully allocated to PDSCHs corresponding to SC-MCCH carrying each SC-PTM configuration information segment, for each segment, determining time slot subscripts of K PDCCH occasions corresponding to each segment according to K0 adopted by PDSCH corresponding to each segment in PDSCH time domain resource allocation and K time slot subscripts of corresponding SC-MCCH segments, and uniformly allocating or respectively allocating Control Channel Element (CCE) resources for PDCCH transmitted in the K PDCCH occasions, wherein for each occasion in the K occasions, the K0 adopted by PDSCH in each occasion and the time slot subscript of the occasion determine the time slot subscript of the PDCCH occasion corresponding to the occasion, the K0 is a timing difference between PDSCH transmitted in one occasion and PDCCH carrying PDSCH dynamic scheduling information of the PDSCH of the occasion, the unit is a time slot, the K0> = is used for indicating that the PDSCH is transmitted prior to the PDSCH or is transmitted simultaneously with the PDSCH, when the time domain resources are allocated to one occasion, the value of the K is a value of a PDSCH/PTCH of a PTCH block in a current NR cell, wherein the number of SS/PBCH beam configuration is not required to be transmitted on SC-SC segments, and SC-SC beam configuration information is not required to be transmitted on SC-SC;

2. The method of claim 1, wherein the SC-MCCH semi-static configuration information comprises: controlling resource set CORESET configuration information, search space configuration information and SC-MCCH semi-static time domain configuration information, wherein the SC-MCCH semi-static time domain configuration information comprises: and sending the configuration information of the BWP of the SC-MCCH and the SC-MCCH broadcast parameters.

3. The method of claim 1, further comprising:

4. The method according to claim 1, wherein the performing the corresponding processing on the PDCCH specifically includes:

when bit scrambling is performed on a PDCCH carrying SC-MCCH scheduling information, an initialization value of a pseudo-random sequence generator is determined according to the following formula, and related parameters in the following formula are configured according to a given value or a given configuration mode:

is the physical layer of a cellA cell ID;

a PDCCH scrambling ID is uniformly configured for the PDCCH bearing the SC-MCCH scheduling information in each cell, and the PDCCH bearing the SC-MCCH scheduling information in all the cells adopts the value to perform bit scrambling;

or configuring a fixed value as a PDCCH scrambling ID for a PDCCH bearing the SC-MCCH scheduling information in the NR cell in a 3GPP protocol;

n _RNTI the setting is performed in any of the following ways:

n _RNTI ＝0；

setting n _RNTI The value of (a) is SC-RNTI which is used for configuring information on an empty identifier SC-MCCH or SC-PTM _RNTI The value of SC-RNTI is used for bearing PDCCH of SC-MCCH scheduling information on an empty identifier;

determining an initialization value of the pseudo-random sequence generator according to the following formula, wherein the related parameters are configured according to a given value or a given configuration mode in the following formula:

wherein,

for the number of symbols included in one slot,

index of time slot in a radio frame when SCS parameter of NR cell is u, l is index of symbol in a time slot, N _ID E {0,1.,. 65535} is the scrambling ID of PDCCH DMRS,

n _ID the setting is performed in any of the following ways:

allocation of N to DMRS of PDCCH bearing SC-MCCH scheduling information in cell _ID ；

Or to N in 3GPP protocols _ID A fixed value is assigned.

5. The method of claim 1, wherein configuring the search space and the CORESET corresponding to the PDCCH comprises:

and scrambling CRC of a PDCCH (physical downlink control channel) carrying SC-MCCH (single-channel radio network temporary identifier) scheduling information by using an SC-RNTI (single-cell temporary identifier), wherein the type of a search space corresponding to the PDCCH is as follows: a common type, wherein a common search space CSS-C corresponding to SC-MCCH is used for representing a common search space corresponding to the PDCCH, a CORESET corresponding to the common search space is used for representing CORESET-C,

polymerization grade L =1,2,4,8 or 16 adopted for CSS-C on CORESET-C;

in an NR cell, the whole system bandwidth is divided into a plurality of BWPs, and a unique SC-MCCH in the cell is transmitted in the initial BWP or in other BWPs, wherein the cell has a unique CSS-C, the BWP where the CORESET-C corresponding to the CSS-C is located and the adopted air interface resources are designated, and the CORESET-C and the SC-MCCH are in the same BWP.

6. The method of claim 5, further comprising:

7. The method of claim 6, wherein the configuring the CORESET-C corresponding to CSS-C comprises:

setting a CORESET subscript according to the number of CORESET-C in all CORESETs in the cell or the number of CORESET-C in all CORESETs defined in the current BWP;

setting the length of the PDCCH opportunity as the total number of continuous symbols occupied by PDCCH Ocvasion, wherein the value of the total number of continuous symbols occupied by PDCCH Ocvasion is as follows: 1,2 or 3;

setting frequency resources occupied by CORESET, wherein the frequency resources occupied by CORESET are represented by a group of RB;

the mapping mode from CCE to REG is specified in the third generation partnership project 3GPP protocol or indicated by parameters to be non-interleaving mapping or interleaving mapping;

when the 3GPP protocol specifies that the mapping manner from CCE to REG in CORESET-C is: when non-interleaving mapping or interleaving mapping is carried out, corresponding parameters do not need to be carried in configuration information of CORESET-C, and the configuration information is used for indicating a mapping mode from CCE to REG;

when the mapping mode from CCE to REG in CORESET-C is indicated through the parameter, the mapping mode from CCE to REG adopted by CORESET-C is indicated through the parameter of 1 bit in the configuration information, and when the parameter is not configured, the default is as follows: interleaving mapping is not adopted;

when the CORESET-C adopts the interleaving mapping, the configuration information of the CORESET-C needs to carry: length L of REG bundle, interleaving depth R and offset n of interleaver _shift Wherein, the length L of the REG bundle is the number of REGs included in each REG bundle, and the interleaving depth R is: the interleaver includes a number of rows, when n is not configured _shift When, default is:

8. The method according to claim 6 or 7, wherein the configuring CSS-C comprises:

defining subscripts of a search space according to the serial numbers of CSS-C in all SSs in a cell, the serial numbers of CSS-C in all SSs defined in BWP where the CSS-C is located, or the serial numbers of CSS-C in all CSS defined in BWP where the CSS-C is located;

setting the corresponding CORESET subscript: subscript of CORESET-C, mapping CSS-C to CORESET indicated by the subscript;

setting a PDCCH monitoring period and PDCCH monitoring bias, wherein the unit of the monitoring period is a time slot;

setting a monitoring mode of the PDCCH as a subscript of a first symbol of CORESET-C in a time slot for monitoring the PDCCH, wherein the subscript of the first symbol of CORESET-C in the time slot for monitoring the PDCCH and the length of PDCCH Ocvasion in CORESET-C configuration information jointly determine the specific position of each PDCCH Ocvasion;

setting the number of time slots for which the search space lasts in one monitoring period: t is _s ＜k _s ；

The number N (L) of PDCCHs with aggregation level L needing to be detected in each PDCCH detection time, wherein L =1,2,4,8, 16;

setting the type of the search space as COMMON;

9. The method of claim 8, further comprising:

Determined by the following expression:

wherein,

the time slot number of a radio frame is represented when the SCS parameter of the PDCCH is mu, starting from the first PDCCH opportunity in the PDCCH monitoring period, the PDCCH opportunities in the PDCCH monitoring period are numbered according to the time sequence, and the total number is T _s Each time, the time number is from 0 to T _s -1；

For CSS-C with subscript s mapped on CORESET-C with subscript p, CCEs occupied by candidate PDCCHs under each aggregation level are defined by the following expression:

is the number of PDCCH candidates with aggregation level L in CSS-C.

10. The method of claim 9, further comprising:

11. A sending device of SC-MCCH scheduling information in an NR cell is characterized in that the SC-MCCH scheduling information of a single-cell multicast control channel comprises SC-MCCH semi-static configuration information and SC-MCCH dynamic scheduling information, and the device comprises:

the broadcast module is used for broadcasting SC-MCCH semi-static configuration information through SIB1 or newly-added SIB;

a sending module, configured to send, in a new radio access technology NR cell, SC-MCCH dynamic scheduling information corresponding to a corresponding time for each time allocated to a PDSCH corresponding to an SC-MCCH, where the SC-MCCH dynamic scheduling information includes time-frequency resource allocation information allocated to a PDSCH of a physical downlink shared channel corresponding to the SC-MCCH in the corresponding time, and the time-frequency resource allocation information is represented by a DCI format;

the sending module is further configured to:

configuring a search space and a CORESET corresponding to a PDCCH (physical downlink control channel), wherein for each occasion of sending a PDSCH (physical downlink shared channel) corresponding to an SC-MCCH (single-cell dedicated control channel), the PDCCH is used for carrying SC-MCCH dynamic scheduling information corresponding to the occasion, the CRC of the PDCCH is scrambled by using an SC-RNTI (radio frequency identification network temporary identifier), and the SC-RNTI is used for identifying the only SC-MCCH or SC-PTM (packet transport channel) configuration information of a cell;

12. A device for transmitting SC-MCCH scheduling information in an NR cell, comprising: at least one processor and memory;

the memory stores computer-executable instructions;

execution of the computer-executable instructions stored by the memory by the at least one processor causes the at least one processor to perform the method of transmitting SC-MCCH scheduling information in an NR cell according to any one of claims 1 to 10.

13. A computer-readable storage medium having stored thereon computer-executable instructions which, when executed by a processor, implement the method of transmitting SC-MCCH scheduling information in an NR cell according to any one of claims 1 to 10.