CN108024215A

CN108024215A - The transmission method and device of a kind of multicast service

Info

Publication number: CN108024215A
Application number: CN201610962289.4A
Authority: CN
Inventors: 艾建勋; 戴博; 陈宪明; 方惠英; 陆婷
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2016-11-04
Filing date: 2016-11-04
Publication date: 2018-05-11
Also published as: WO2018082703A1

Abstract

The embodiment of the invention discloses the transmission method and device of a kind of multicast service, the described method includes：N number of data block is carried out combined dispatching transmission by access network elements, wherein, the transmission that once repeats of one data block repeats to send for a rank one, and the repetition that N number of data block continuously repeats the repetition transmission for sending M1 rank one and forms a rank two respectively is sent；The repetition of M2 rank two sends to form a N number of combined dispatching transmission of data block.

Description

Transmission method and device of multicast service

Technical Field

The invention relates to a transmission method and a transmission device of multicast service.

Background

In a 3GPP LTE (3 rd Generation partnership project Long Term Evolution) system, a Single Cell point-To-Multipoint (SC-PTM) transmission technology is introduced, and the SC-PTM technology is used To implement transmission of point-To-Multipoint downlink Multimedia Broadcast Multicast Service (MBMS) services in a Single Cell. SC-PTM introduces two logical channels, namely a Single Cell-MulticastControl Channel (SC-MCCH) and a Single Cell-MulticastTraffic Channel (SC-MTCH). In LTE, both SC-MCCH and SC-MTCH are carried over Physical Downlink Shared Channel (PDSCH).

As shown in fig. 1, in order to enhance coverage reception of a UE in narrowband Internet of things (NB-IoT) and LTE enhanced Machine Type Communication (eMTC), the same PDCCH signaling and PDSCH channel data need to be repeatedly transmitted multiple times. As shown in fig. 1, in PDCCH signaling for scheduling PDSCH, in addition to indicating time domain frequency domain resources used by PDSCH channel and modulation coding format MCS, the number of repeated transmission times (Repetition number) of PDSCH and the starting time of scheduling PDSCH transmission, i.e. scheduling delay, are also indicated, and in the prior art, this scheduling timing means that the corresponding PDSCH is scheduled starting in the radio subframe after the last PDCCH subframe.

In NB-IoT or eMTC, how to support SC-PTM has the following problems.

The main purpose of introducing SC-PTM by NB-IoT and eMTC is to provide an efficient point-to-multipoint transmission technology, which is mainly used for massive UE to update software or firmware thereof, and avoid the massive UE from acquiring the service data through a dedicated channel (dedicated channel). Such services obviously require 100% correct and reliable reception of service data, otherwise the received part of the service data has no practical significance. However, the current service transmission method cannot ensure the complete and accurate reception of data.

On the other hand, for a plurality of UEs receiving services facing a broadcast service, different UEs have different coverage signal qualities, so that the number of repetitions of PDSCH reception is different, and how to enable UEs with good coverage signal quality to receive service data as soon as possible reduces battery consumption, and also satisfies the requirement that UEs with poor coverage signals can receive enough repeated PDSCH transmissions to successfully decode data.

Disclosure of Invention

In order to solve the foregoing technical problem, embodiments of the present invention provide a method and an apparatus for transmitting a multicast service.

The technical scheme of the embodiment of the invention is as follows:

a method for transmitting multicast traffic, the method comprising:

the method comprises the steps that an access network element carries out combined scheduling transmission on N data blocks, wherein one-time repeated transmission of one data block is one-time level one-time repeated transmission, and the N data blocks are respectively and continuously sent for M1 times of level one-time repeated transmission to form one-time level two-time repeated transmission; m2 times the level two repeat transmission form N data blocks for one joint scheduling transmission.

In the above scheme, the one-time level one retransmission of the data block is a PDSCH transmission occupying one radio subframe.

In the above solution, when the access network element schedules the joint scheduling transmission of the N data blocks in a dynamic scheduling manner, the scheduling information is indicated in one of the following manners:

the access network element indicates the number information N of the data blocks for joint scheduling through the dynamic scheduling signaling DCI, and indicates the number M2 of repeated sending of level two or the number information of the wireless subframes occupied by one-time joint scheduling transmission through the DCI or the semi-static signaling;

the access network element indicates the number information N of the data blocks for joint scheduling through the semi-static scheduling signaling, and indicates the number M2 of repeated sending of level two through the DCI or the semi-static signaling, or indicates the number information of the wireless subframes occupied by one-time joint scheduling transmission.

In the above scheme, the access network element further indicates the number of repeated sending times M1 of level one through a dynamic scheduling signaling DCI or a semi-static signaling.

In the above scheme, the value of M1 is 1, and the N data blocks are transmitted once to form a level two repeat transmission.

In the above scheme, when the network element of the access network indicates the number of times M2 of level two repeated transmissions, the number of radio subframes occupied by the PDSCH in one joint scheduling transmission is M2 × N × M1;

and when the access network element indicates the number T of the wireless subframes occupied by the PDSCH in one joint scheduling transmission, M2 is T/(N M1).

In the above scheme, the method further comprises:

and when the network element of the access network determines that the number of the data blocks needing to be scheduled and sent is less than the number N of the data blocks which can be transmitted and indicated by the signaling, the network element of the access network forms N data blocks together by constructing a pseudo data block which does not contain data and the data blocks needing to be sent.

A method for transmitting traffic, the method comprising:

when the network element of the access network schedules the transmission service or the signaling radio bearer, a multi-transmission period MTP is configured for the service or the signaling radio bearer, and the N data blocks are scheduled and transmitted once or for multiple times in the MTP.

In the foregoing solution, the configuring a multiple transmission cycle MTP for the service or the signaling radio bearer includes:

configuring length information L of the MTP; or

And configuring length information L of the MTP and Offset information Offset of the starting position of the MTP.

In the above scheme, the starting position of the MTP is determined by:

(H-SFN*1024+SFN)mod L＝offset；

wherein, H-SFN is system hyper frame number, SFN is system frame number, mod is modulus operation symbol, L is MTP length, offset is offset of MTP initial position; the starting positions of the MTPs are H-SFN and SFN which meet the formula; wherein the default value of offset is 0.

In the foregoing solution, the scheduling transmission of the N data blocks in the MTP one or more times includes:

and the access network element sends a dynamic scheduling signaling for scheduling the service or the data block of the signaling radio bearer in the MTP.

In the above solution, the access network element schedules the N data blocks in an MTP repeat mode, where the MTP repeat mode is used to repeatedly schedule and transmit the N data blocks in multiple MTPs, and information of the MTP repeat mode at least includes: the number M of MTPs used for scheduling transmission of the N data blocks, and the interval length P between two adjacent MTPs in the MTPs used for scheduling transmission of the N data blocks, wherein M is a positive integer greater than or equal to 1, P is a positive integer greater than or equal to 1, and the interval between two adjacent MTPs is the interval length between the starting positions of two adjacent MTPs, or the interval length between the ending position of the previous MTP and the starting position of the next MTP in the two adjacent MTPs.

In the above scheme, the unit of the interval length P between two adjacent MTPs is the number of MTPs, and correspondingly, the interval between two adjacent MTPs in the multiple MTPs is the length of P MTPs.

In the above scheme, when the N data blocks are repeatedly scheduled for transmission in multiple MTPs, the N data blocks are scheduled for transmission one or more times in each MTP.

In the above scheme, in one MTP, the scheduling, by the access network element, the N data blocks one or more times includes:

each data block is respectively and independently scheduled, so that PDSCH channel resources bearing one data block are scheduled through independent PDCCH signaling DCI; or

One PDCCH signaling DCI schedules PDSCH channels of N data blocks.

In the scheme, in one MTP, each data block is scheduled to be transmitted for N2 times, and N2 is greater than or equal to 1; scheduling the sequence of N2 transmissions of N data blocks in one MTP includes:

scheduling the next data block after each data block is scheduled for transmission for N2 times; or,

the N data blocks are scheduled in turn once as a repeat and repeated N2 times.

In the above scheme, in the DCI for dynamically scheduling the N data blocks, the MTP where the current scheduling is located is indicated as a sequence number in the M MTPs that schedule the N data blocks, or the number of MTPs that are used for scheduling and transmitting the N data blocks after the current MTP is indicated.

In the above scheme, when a data block is scheduled to be transmitted only once in each MTP, the sequence number of the MTP where the current scheduling is located in the M MTPs is the sequence number of the scheduled data block, and the number M of the MTPs is the number of times of the scheduled transmission of the data block.

In the above scheme, when the number N of Data blocks scheduled for transmission in one MTP is greater than 1, the access network element also schedules the identifier Data-ID of the indicated Data block in the DCI of the Data block. The same Data block has the same identification Data-ID when transmitted in different MTPs.

In the above scheme, the identifier Data-ID of the Data block is the sequence number of a Data block in the N Data blocks.

A method for transmitting traffic, the method comprising:

the access network element indicates the length information L of the MTP with multiple transmission periods through semi-static signaling or dynamic scheduling signaling DCI; when the length information of the MTP is not indicated, the length of the MTP is the length of the scheduling period of the transmission channel or the logic channel of the SRB carrying the service or the signaling radio bearer.

In the above scheme, the network element of the access network indicates Offset information Offset of the starting position of the MTP through a semi-static signaling or a dynamic scheduling signaling DIC; offset information of the starting position of the MTP is not indicated, and the offset information of the starting position of the MTP is zero by default.

In the above scheme, the access network element indicates MTP number information M in a repeat mode through a semi-static signaling or a dynamic scheduling signaling DIC; when MTP number information in the repeat mode is not indicated, MTP number information M in the repeat mode is 1 or a protocol specified value by default.

In the above scheme, the access network element indicates, through semi-static signaling or dynamic scheduling signaling DIC, interval information P of two adjacent MTPs in the repetition mode; when no P value is indicated, the P value defaults to 1.

In the above scheme, the access network element indicates the number N of data blocks for scheduling transmission in one MTP through a semi-static signaling or a dynamic scheduling signaling DIC; when N is not indicated, the value of N is 1 by default.

In the above solution, the access network element indicates the number of times that a data block is scheduled for transmission in an MTP by semi-static signaling or dynamic scheduling signaling DIC N2; when N2 is not indicated, the N2 value defaults to 1.

A method for transmitting multicast traffic, the method comprising:

and the receiving end receives the N data blocks in one or more MTPs in the M MTPs.

In the above scheme, when the receiving end detects downlink control information DCI for scheduling a received service or signaling radio bearer SRB in one MTP, the receiving end determines that MTP after MTP is used for scheduling and transmitting a data block for current MTP transmission according to a sequence number of current MTP indicated in DCI in M MTP and a value of M, or an indicated MTP number of a remaining scheduling identical data block after current MTP.

In the above scheme, the method further comprises:

and the receiving end combines and receives the PDSCH channel of the multiple scheduling transmission of a certain data block of the multiple MTPs.

In the above scheme, the method further comprises:

and the receiving end judges the data blocks scheduled in different MTPs to be different data blocks according to the MTP boundary.

In the above scheme, the method further comprises:

the receiving end attempts to receive the data block in an MTP no more than N × N2 times.

An apparatus for transmitting multicast traffic, the apparatus comprising:

a scheduling unit, configured to perform joint scheduling transmission on N data blocks, where one-time repeated transmission of one data block is one-time level one repeated transmission, and the N data blocks are respectively continuously and repeatedly transmitted M1 times of level one repeated transmission to form one-time level two repeated transmission; m2 times of repeated transmission of level two form N data blocks and one time of joint scheduling transmission

In the foregoing solution, the scheduling unit is further configured to indicate scheduling information in one of the following manners when scheduling the joint scheduling transmission of the N data blocks in a dynamic scheduling manner:

indicating the number information N of data blocks for joint scheduling through a dynamic scheduling signaling DCI, and indicating the number M2 of repeated sending of level two or the number information of wireless subframes occupied by one-time joint scheduling transmission through the DCI or semi-static signaling;

the number information N of the data blocks for joint scheduling is indicated through semi-static scheduling signaling, and the number M2 of repeated sending of level two or the number information of the wireless subframes occupied by one-time joint scheduling transmission is indicated through DCI or semi-static signaling.

In the foregoing scheme, the scheduling unit is further configured to indicate the number of repeated transmission times M1 of level one through dynamic scheduling signaling DCI or semi-static signaling.

An apparatus for transmitting multicast traffic, the apparatus comprising: a scheduling unit and a configuration unit, wherein:

the scheduling unit is used for scheduling transmission service or signaling radio bearer;

a configuration unit, configured to configure a multiple transmission cycle MTP for the service or the signaling radio bearer, and schedule and transmit the N data blocks in the MTP one or multiple times.

In the foregoing solution, the configuration unit is further configured to:

configuring length information L of the MTP; or

In the above scheme, the apparatus further comprises:

the determining unit is used for determining the starting position of the MTP and comprises the following modes:

(H-SFN*1024+SFN)mod L＝offset；

wherein, H-SFN is system hyper frame number, SFN is system frame number, mod is modulus operation symbol, L is MTP length, offset is offset of MTP initial position; the starting position of the MTP is H-SFN and SFN which meet the formula, wherein the default value of the offset is 0.

An apparatus for transmitting traffic, the apparatus comprising:

an indicating unit, configured to indicate length information L of the MTP in the multiple transmission periods through semi-static signaling or dynamic scheduling signaling DCI;

a determining unit, configured to determine, when the indicating unit does not indicate the length information of the MTP, that the length of the MTP is the length of a scheduling period of a transport channel or a logical channel carrying the service or the signaling radio bearer SRB.

In the above solution, the indicating unit is further configured to indicate Offset information Offset of an MTP starting position through semi-static signaling or dynamic scheduling signaling DIC;

the determining unit is further configured to determine that the offset information of the starting position of the MTP is zero by default when the indicating unit does not indicate the offset information of the starting position of the MTP.

In the foregoing solution, the indicating unit is further configured to indicate MTP number information M in a repetition mode through semi-static signaling or dynamic scheduling signaling DIC; the determining unit is further configured to determine that MTP number information M in the repetition mode is 1 or a protocol specified value by default when the indicating unit does not indicate MTP number information in the repetition mode.

In the foregoing solution, the indicating unit is further configured to indicate, through semi-static signaling or dynamic scheduling signaling DIC, interval information P of two adjacent MTPs in the repetition mode; the determining unit is further configured to default the P value to 1 when the indicating unit does not indicate the P value.

According to the technical scheme of the embodiment of the invention, an access network element carries out combined scheduling transmission on N data blocks, wherein one-time repeated transmission of one data block is one-time level one-time repeated transmission, and the N data blocks are respectively and continuously sent for M1 times of level one-time repeated transmission to form one-time level two-time repeated transmission; m2 times the level two repeat transmission form N data blocks for one joint scheduling transmission. By the technical scheme of the embodiment of the invention, the service in point-to-multipoint transmission can be accurately received by the receiving end, and the data can be completely received. The embodiment of the invention realizes the service data reception of the UE as soon as possible, thereby reducing the battery consumption of the UE and meeting the requirement that the UE with poor coverage signals receives enough PDSCH repeated transmission to successfully decode data.

Drawings

FIG. 1 is a diagram illustrating repeated transmission of PDCCH signaling and PDSCH channel data in NB-IoT and eMTC;

FIG. 2 is a diagram illustrating joint scheduling transmission of data blocks according to an embodiment of the present invention;

FIG. 3 is a schematic diagram illustrating an offset O configuration of the starting bit and the length L of the MTP according to the embodiment of the present invention;

fig. 4 is a schematic diagram illustrating an MTP scheduling only one data block according to an embodiment of the present invention;

fig. 5 is a schematic diagram illustrating scheduling of 2 data blocks for scheduling transmission in MTP according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a transmission apparatus for multicast services according to a first embodiment of the present invention;

fig. 7 is a schematic structural diagram of a transmission apparatus for multicast service according to a second embodiment of the present invention;

fig. 8 is a schematic structural diagram of a service transmission apparatus according to a third embodiment of the present invention.

Detailed Description

So that the manner in which the features and aspects of the embodiments of the present invention can be understood in detail, a more particular description of the embodiments of the invention, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings.

Example 1

In the present embodiment, a method for interleaving transmission of a plurality of data blocks is provided.

As shown in fig. 2, the network element in the access network performs joint scheduling transmission on the N data blocks.

One-time repeated transmission of one data block is referred to as one-time level one repeated transmission, and the N data blocks are continuously repeated M1 times of level one repeated transmission respectively and constitute one-time level two repeated transmission. The M2 level two repeat transmissions constitute one complete scheduled transmission.

Specifically, the one-time level one retransmission of one data block is PDSCH retransmission occupying one radio subframe, and then the N data blocks are respectively and continuously retransmitted by M1 radio subframes to form one-time level two retransmission, and the M2 continuous level two retransmission forms one-time complete scheduling transmission of the N data blocks.

When the access network element schedules the joint scheduling transmission of the N data blocks in a dynamic scheduling mode, the access network element indicates scheduling information in one of the following modes:

1. the access network element indicates the number information N of the data blocks for joint scheduling through the DCI, and indicates the number M2 of the second repetition of the level through the DCI or the semi-static signaling, or indicates the number information of the wireless subframes occupied by one-time scheduling transmission.

2. The access network element indicates the number information N of the data blocks for joint scheduling through the semi-static scheduling signaling, and indicates the number M2 of the second repetition of the level through DCI or semi-static signaling, or indicates the number information of the radio subframes occupied by one-time scheduling transmission.

When the access network element schedules the joint scheduling transmission of the N data blocks in a semi-static scheduling manner, the access network element indicates, in a semi-static signaling, the number information N of the data blocks for joint scheduling and the number information of the radio subframes occupied by the level two repetition times M2 or the one-time scheduling transmission.

Optionally, the access network element further indicates the repetition number M1 of level one through dynamic scheduling signaling DCI or semi-static signaling. By default, M1 has a value of 1, i.e., N data blocks are transmitted once each constituting a level two repeat transmission.

In the above method, if the number of times of level two repetition M2 is indicated, the number of radio subframes occupied by PDSCH in one complete scheduled transmission is M2 × N × M1, and if the number of radio subframes occupied by one scheduled transmission is indicated, the number of radio subframes occupied by PDSCH in one complete scheduled transmission is T2 ═ T/(N × M1). It is assumed that one retransmission of level one occupies one radio subframe, and if one retransmission of level one occupies a plurality of radio subframes, this factor is correspondingly added to the above formula.

The semi-static signaling comprises an SC-MCCH message, and the access network element indicates the information in the scheduling information of a certain specific service in the SC-MCCH message at the moment.

In different requirements, different signaling indication modes can be selected, and different beneficial effects can be achieved.

For example, the above N is indicated by a dynamic scheduling signaling DCI, which has a complete dynamic scheduling performance, and an access network element may determine the number of N according to the number of data blocks and the number of waiting-to-be-scheduled data blocks when scheduling data, but increases the overhead of the DCI while obtaining flexibility.

The access network element indicates the number of the subframes occupied by the M2 or the primary scheduling through the dynamic scheduling signaling DCI, which also has the greatest flexibility, but also brings about an increase in DCI overhead.

For a scene that the number of data blocks needing to be scheduled and transmitted at a time is determined and does not change for a period of time, it is more appropriate to use semi-static signaling to indicate the information. For example, after the SC-MCCH message in the SC-PTM is segmented in the RLC layer, it is divided into N RLC PDUs, i.e. N data blocks, and the size of the SC-MCCH message does not change within a certain time, then the semi-static signaling SIB20 may be used to indicate the above-mentioned information, such as N and M2, used when scheduling the data blocks of the SC-MCCH message.

When the above N is indicated by the semi-static signaling, if the number of data blocks to be scheduled is less than N, the following method is needed to solve the problem:

when the access network element is scheduled, if the number of the data blocks needing to be scheduled and transmitted is less than the signaling N indicated by the signaling, the access network element and the data blocks needing to be transmitted form N data blocks together by manufacturing a pseudo data block which does not contain data. And these dummy data blocks, which do not contain data blocks, are arranged to be transmitted after the data blocks that need to be transmitted. These dummy data blocks are RLC PDUs or MAC PDUs whose data part contains only coding.

The data block described in this embodiment may be in the form of an RLC PDU, a MAC PDU, or a MAC layer Transport Block (TB).

By the method of the embodiment, the access network element realizes the interleaved transmission when a plurality of data blocks are scheduled. And the number of the data blocks for joint scheduling is dynamically adjusted through the indication of the signaling. In this transmission mode, a UE with good signal coverage can receive N data blocks as soon as possible, and a UE with bad signal also has enough receivers to combine (combine) the N data blocks repeatedly to achieve successful decoding.

Example 2

The embodiment provides a method for repeatedly scheduling and transmitting N data blocks for multiple times.

An access network element schedules and transmits a service or a Signaling Radio Bearer (SRB), configures a Multiple Transmission Period (MTP) for the SRB, and schedules and transmits the N data blocks in the MTP one or more times.

The configuration of the MTP for multiple transmission periods by the network element of the access network at least comprises: length information L of the MTP. Optionally, Offset information Offset of the starting position of the MTP is further included.

The starting position of the one MTP is calculated by the following formula:

(H-SFN*1024+SFN)mod L＝offset；

wherein: H-SFN is the system hyper frame number, SFN is the system frame number, mod is the modulo arithmetic sign, L is the length of MTP, and offset is the offset of the starting position of MTP. The starting positions of the MTPs are H-SFN and SFN which meet the formula; the default value of the offset is 0.

Optionally, the network element of the access network sends a dynamic scheduling signaling for scheduling the service or the data block of the SRB in the MTP. If the service or SRB has a scheduling period or a repeating period, or further, the service or SRB configures a time window for scheduling, the access network element sends a dynamic scheduling signaling of the service or SRB in the MTP within the scheduling period or the repeating period of the service or SRB and the configured scheduling time window.

The access network element schedules the plurality of data blocks in an MTP repeat mode, the MTP repeat mode is used for repeatedly scheduling and transmitting the N data blocks in the plurality of MTPs, and the information of the MTP repeat mode at least comprises: the number M of MTPs used for scheduling transmission of the N data blocks, and the interval length P between two adjacent MTPs in the MTPs used for scheduling transmission of the N data blocks, wherein the value range of M is a positive integer greater than or equal to 1, the value of P is a positive integer greater than or equal to 1, and the interval between two adjacent MTPs is the interval length between the starting positions of two adjacent MTPs, or the interval length between the ending position of the previous MTP and the starting position of the next MTP in the two adjacent MTPs.

Preferably, the unit of the interval length P of two adjacent MTPs is the number of MTPs, and at this time, the interval between two adjacent MTPs in the plurality of MTPs is the length of P MTPs.

The N data blocks are scheduled for transmission repeatedly in the MTPs, that is, in each MTP, the N data blocks are scheduled for transmission one or more times. In one MTP, the access network element schedules the N data blocks one or more times, and the specific scheduling manner includes but is not limited to:

1. and each data block is respectively and independently scheduled, namely, the PDSCH channel carrying one data block is repeatedly scheduled through independent PDCCH signaling DCI once or for multiple times.

2. One PDCCH signaling DCI schedules PDSCH channels of N data blocks.

3. The joint scheduling method of N data blocks provided by the embodiment 1 of the invention is used for scheduling transmission.

Optionally, in an MTP, each data block may be scheduled to be transmitted N2 times, where N2 is greater than or equal to 1.

When scheduling N2 transmissions of N data blocks in an MTP of an access network, the scheduling order includes:

1. scheduling the next data block after each data block is scheduled for transmission for N2 times; i.e., according to (data Block 1, data Block 1 …), (data Block 2, data Block 2 …) … (data Block N, data Block N …)

2. The N data blocks are scheduled one time in sequence as a repetition, i.e. the access network schedules the transmission N2 times in the manner of (data block 1, data block 2 … data block N), (data 1, data 2 … data N) …;

optionally, in the DCI for dynamically scheduling the N data blocks, the MTP where the current scheduling is located is indicated as a sequence number in the M MTPs that schedule the N data blocks, or the number of MTPs that are used to schedule and transmit the N data blocks after the current MTP (including or not including the current MTP).

When a data block is scheduled to be transmitted only once in each MTP, the sequence number of the MTP is equal to the scheduled sequence number of the data block, and the number of the MTP is equal to the number of times of scheduled transmission of the data block.

Optionally, if the number N of the Data blocks scheduled to be transmitted in one MTP is greater than 1, the access network element also schedules an identifier Data-ID of an indication Data block in the DCI of the Data block, and the same Data block has the same identifier Data-ID when transmitted in different MTPs.

Preferably, the identifier Data-ID of the Data block is the sequence number of a Data block in the N Data blocks, that is, the identifier of the first Data block in the N Data blocks is 0, the identifier of the second Data block is 1, and so on.

The access network element indicates the UE scheduling information through signaling, and the method comprises the following steps:

optionally, the access network element indicates the length information L of the MTP through a semi-static signaling or a dynamic scheduling signaling DCI; if not, the length of L is the length of the dispatching cycle of the transmission channel or the logic channel carrying the service or the SRB.

Optionally, the access network element indicates Offset information Offset of the MTP starting position through semi-static signaling or dynamic scheduling signaling DIC; if not, the default value of Offset is zero.

Optionally, the network element of the access network indicates the MTP number information M in the repeat mode through a semi-static signaling or a dynamic scheduling signaling DIC; if not, the default value of M is 1 or the value agreed by the protocol;

optionally, the access network element indicates, through a semi-static signaling or a dynamic scheduling signaling DIC, interval information P of two adjacent MTPs in the repetition mode; if not, the default value of P is 1, namely the MTPs are continuous MTPs;

optionally, the access network element indicates the number N of data blocks for scheduling transmission in one MTP through a semi-static signaling or a dynamic scheduling signaling DIC; if not, the default value of N is 1;

optionally, the access network element indicates, through semi-static signaling or dynamic scheduling signaling DIC, the number of times N2 that a data block is scheduled for transmission in an MTP; if not, the default value of N2 is 1;

the receiving end UE receiving the N data blocks comprises:

When a receiving end detects DCI for scheduling received service or SRB in one MTP, it can determine which MTP schedules to transmit the data block of current MTP transmission after the MTP according to the sequence number of the current MTP in M MTPs and the value of M indicated in the DCI, or the indicated MTP number of the remaining scheduling same data block after the current MTP.

And the UE combines and receives the PDSCH channel of the multiple scheduling transmission of a certain data block of the multiple MTPs.

And the UE judges the data blocks scheduled in different MTPs to be different data blocks according to the MTP boundary.

The number of times the UE attempts to receive a data block in one MTP does not exceed N × N2 times.

The data block is a Transmission Block (TB), or a Payload Data Unit (PDU) of a radio link control protocol (RLC), or a Payload Data Unit (PDU) of a media access control protocol (MAC).

The transmission channel at least comprises: SC-MTCH channel, DTCH channel, DCCH channel, CTCH channel, MTCH channel, MCCH channel.

The semi-static signaling at least comprises: a system information block for indicating SC-MCCH message scheduling information, and SC-MCCH messages for indicating SC-MTCH scheduling information;

the dynamic scheduling signaling at least comprises: DCI carried by a PDCCH channel.

The network element of the access network at least comprises an enhanced base station eNB defined by a 3GPP protocol.

As shown in fig. 3, the access network element configures the length L of the MTP and the offset O of the start bit. And indicates that the MTP repetition pattern is: the number M of MTPs is 3, the number of different data blocks scheduled in each MTP is 2, that is, data blocks 1 and 2, and indicates that the interval between two adjacent MTPs for scheduling data 1 and 2 is 2 MTPs, or the MTP repetition period for scheduling data 1 and 2 is 2 MTPs.

The access network element starts scheduling transmission data blocks 1 and 2 at any MTP, identified as MTP N in fig. 3, and repeats scheduling data blocks 1 and 2 in the following MTP N +2 and MTP N + 4.

The UE decides to receive the scheduled transmission of data blocks 1 and 2 at the MTP according to the decoding requirement.

In MTP n, the access network element indicates, through DCI, that the sequence number of the current MTP is the first MTP of the scheduling data blocks 1 and 2, which is represented by 0 or 1, and so on, and in MTP n +1 and MTP n +2, indicates, through DCI, that the sequence number of the current MTP is the second and third MTP.

The UE that starts to receive the service at any time knows the sequence number of the current MTP according to the sequence number of MTP indicated above, and knows which MTP to schedule transmission data blocks 1 and 2 after the MTP according to the number M of MTP of scheduling data blocks 1 and 2, for example, the UE starts to receive data at MTP n +2, the UE knows that data blocks 1 and 2 are scheduled in the following MTP n +4 according to the current MTP sequence number 2 indicated by DCI of the scheduling data block 1 or 2 in MTP n +2, the number M of MTP of scheduling data blocks 1 and 2 is 3, and the interval of MTP of scheduling data blocks 1 and 2 is 2 MTP. Therefore, the UE cannot keep alignment with the transmission of the access network because the MTP of the first scheduling data blocks 1 and 2 is not received, and the network element of the access network can start scheduling data blocks 1 and 2 at any MTP, without an additional mechanism for the UE to know the starting MTP positions of the scheduling data blocks 1 and 2.

If the UE has successfully decoded data blocks 1 and 2 in MTP n +2, the UE may ignore data transmitted in MTP n +4, and if the UE does not decode data block 1 or 2 in MTP n +2, the UE may continue to read scheduled transmission of data blocks 1 and 2 in MTP n +4, and identify which data block is scheduled for transmission by the identification of the data block indicated in DCI of the scheduled data block, so that the PDSCH channel signal of data block 1 or data block 2 received in MTP n +4 and the PDSCH channel signal of corresponding data block 1 or data block 2 received in MTP n +2 may be combined and decoded.

In this embodiment, taking the scheduling transmission of data blocks 1 and 2 as an example, in other MTPs, the access network element may also schedule other data blocks of the same service or SRB.

Fig. 4 is another preferred embodiment of the present invention, in this example, one MTP schedules only one data block, which is marked as 1 in the figure, and in one MTP, data block 1 is scheduled to be transmitted 2 times. In each MTP, the access network element indicates, through the DCI of the scheduling data block 1, that the current MTP is the sequence number in the MTP used for scheduling data block 1. The DCI sent in MTP n in the figure for scheduling the service or SRB indicates that the sequence number of the current MTP is the first MTP, or indicates that there are 2 MTPs after the current MTP for transmitting the same data block as the current MTP. By analogy, in MTP n +2 and MTP n +4, the DCI indicates that the current MTP is the second and third MTP, respectively.

Fig. 5 is a third preferred embodiment of this embodiment, in this example, 2 data blocks are scheduled to be transmitted in one MTP, and each data block is scheduled to be transmitted 2 times. In fig. 5, MTP n and MTP n +2 are used to schedule the transmission of data block 1 and data block 2. In one MTP, data block 1 and data block 2 are scheduled 2 times consecutively, respectively. Namely N2 and N2 2. The access network element indicates that the data block identifiers of the DCI scheduling data block 1 and the DCI scheduling data block 2 are 0 and 1, respectively, to distinguish the two.

Fig. 6 is a schematic structural diagram of a transmission apparatus for multicast service according to a first embodiment of the present invention, and as shown in fig. 6, the transmission apparatus for multicast service according to the first embodiment of the present invention includes:

a scheduling unit 60, configured to perform joint scheduling transmission on N data blocks, where one-time repeated transmission of one data block is one-time level one-time repeated transmission, and the N data blocks are respectively continuously and repeatedly transmitted M1 times of level one repeated transmission to form one-time level two repeated transmission; m2 times of repeated transmission of level two form N data blocks and one time of joint scheduling transmission

The scheduling unit 60 is further configured to indicate scheduling information in one of the following manners when scheduling the joint scheduling transmission of the N data blocks in a dynamic scheduling manner:

The scheduling unit 60 is further configured to indicate the number of repeated transmission times M1 of level one through dynamic scheduling signaling DCI or semi-static signaling.

Those skilled in the art will understand that the functions implemented by each unit in the transmission apparatus of the multicast service shown in fig. 6 can be understood by referring to the related description of the transmission method of the multicast service. The scheduling unit shown in fig. 6 may be implemented by a microprocessor, an FPGA, a digital signal processor, etc.

Fig. 7 is a schematic structural diagram of a transmission apparatus of a multicast service according to a second embodiment of the present invention, and as shown in fig. 7, the transmission apparatus of a multicast service according to the second embodiment of the present invention includes a scheduling unit 70 and a configuration unit 71, where:

a scheduling unit 70, configured to schedule a transmission service or a signaling radio bearer;

a configuration unit 71, configured to configure a multiple transmission period MTP for the service or the signaling radio bearer, and schedule and transmit the N data blocks in the MTP one or multiple times.

The configuration unit 71 is further configured to:

configuring length information L of the MTP; or

On the basis of the transmission apparatus for multicast service shown in fig. 7, the transmission apparatus for multicast service according to the embodiment of the present invention further includes:

a determining unit (not shown in fig. 7) for determining the starting position of the MTP in the following manner:

(H-SFN*1024+SFN)mod L＝offset；

wherein, H-SFN is system hyper frame number, SFN is system frame number, mod is modulus operation symbol, L is MTP length, offset is offset of MTP initial position; the starting positions of the MTPs are H-SFN and SFN which meet the formula; the default value of Offset is 0.

Those skilled in the art will understand that the functions implemented by each unit in the transmission apparatus of the multicast service shown in fig. 7 can be understood by referring to the related description of the transmission method of the multicast service. The scheduling unit, the configuration unit and the determination unit shown in fig. 7 may be implemented by a microprocessor, an FPGA, a digital signal processor, and the like.

Fig. 8 is a schematic structural diagram of a service transmission apparatus according to a third embodiment of the present invention, and as shown in fig. 8, the service transmission apparatus according to the third embodiment of the present invention includes:

an indicating unit 80, configured to indicate length information L of the MTP in the multiple transmission periods through semi-static signaling or dynamic scheduling signaling DCI;

a determining unit 81, configured to determine, when the indicating unit does not indicate the length information of the MTP, that the length of the MTP is the length of the scheduling period of the transport channel or the logic channel carrying the service or the signaling radio bearer SRB.

The indicating unit 80 is further configured to indicate Offset information Offset of the MTP starting position through semi-static signaling or dynamic scheduling signaling DIC;

the determining unit 81 is further configured to determine that the offset information of the MTP starting position is zero by default when the indicating unit 80 does not indicate the offset information of the MTP starting position.

The indicating unit 80 is further configured to indicate MTP number information M in a repetition mode through semi-static signaling or dynamic scheduling signaling DIC; the determining unit 81 is further configured to determine that MTP number information M in the repetition mode is 1 or a protocol specified value by default when the indicating unit 80 does not indicate MTP number information in the repetition mode.

The indicating unit 80 is further configured to indicate, through semi-static signaling or dynamic scheduling signaling DIC, interval information P of two adjacent MTPs in the repetition mode; the determining unit 81 is further configured to default to 1 when the indicating unit 80 does not indicate the P value.

Those skilled in the art will understand that the functions implemented by each unit in the transmission apparatus of the multicast service shown in fig. 8 can be understood by referring to the related description of the transmission method of the multicast service. The determining units shown in fig. 8 may be implemented by a microprocessor, FPGA, digital signal processor, etc. The indication unit may be implemented by an antenna system or the like.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described device embodiments are merely illustrative, for example, the division of the unit is only a logical functional division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the coupling, direct coupling or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between the devices or units may be electrical, mechanical or other forms.

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, that is, may be located in one place, or may be distributed on a plurality of 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, all the functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be separately regarded as one unit, or two or more units may be integrated into one unit; the integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: various media that can store program codes, such as a removable Memory device, a Read Only Memory (ROM), a magnetic disk, or an optical disk.

Alternatively, the integrated unit of the present invention may be stored in a computer-readable storage medium if it is implemented in the form of a software functional module and sold or used as a separate product. Based on such understanding, the technical solutions of the embodiments of the present invention may be essentially implemented or a part contributing to the prior art may be embodied in the form of a software product, which is stored in a storage medium and includes several 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 methods described in the embodiments of the present invention. And the aforementioned storage medium includes: various media that can store program codes, such as a removable Memory device, a Read Only Memory (ROM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention 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 invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A method for transmitting multicast services, the method comprising:

2. The method of claim 1, wherein the one-level-one repeated transmission of the one data block is a Physical Downlink Shared Channel (PDSCH) transmission occupying one radio subframe.

3. The method of claim 1, wherein when the access network element schedules the joint scheduling transmission of the N data blocks by a dynamic scheduling method, the scheduling information is indicated by one of the following methods:

4. The method of claim 3, wherein the access network element further indicates the number of repeated transmissions M1 at level one by dynamic scheduling signaling DCI or semi-static signaling.

5. The method of claim 4, wherein the value of M1 is 1, and wherein the N data blocks are transmitted once to form a level two repeat transmission.

6. The method of claim 3, wherein when the access network element indicates the number of repeated transmissions at level two, M2, the number of radio subframes occupied by the PDSCH in one joint scheduling transmission is M2N M1;

7. The method of claim 3, further comprising:

8. A method for transmitting a service, the method comprising:

9. The method of claim 8, wherein configuring a Multiple Transfer Period (MTP) for the traffic or the signaling radio bearer comprises:

configuring length information L of the MTP; or

10. The method of claim 9 wherein the starting position of the MTP is determined by:

(H-SFN*1024+SFN)mod L＝offset；

11. The method of claim 9, wherein scheduling the transmission of the N data blocks one or more times in the MTP comprises:

12. The method of claim 9, wherein the access network element schedules the N data blocks in an MTP repetition mode, wherein the MTP repetition mode is used for repeatedly scheduling transmission of the N data blocks in multiple MTPs, and wherein the information of the MTP repetition mode at least comprises: the number M of MTPs used for scheduling transmission of the N data blocks, and the interval length P between two adjacent MTPs in the MTPs used for scheduling transmission of the N data blocks, wherein M is a positive integer greater than or equal to 1, P is a positive integer greater than or equal to 1, and the interval between two adjacent MTPs is the interval length between the starting positions of two adjacent MTPs, or the interval length between the ending position of the previous MTP and the starting position of the next MTP in the two adjacent MTPs.

13. The method of claim 12 wherein the separation length P of two adjacent MTPs is expressed in terms of the number of MTPs, and correspondingly, the separation between two adjacent MTPs in the plurality of MTPs is expressed in terms of the length of P MTPs.

14. The method of claim 8 wherein the N data blocks are scheduled for transmission one or more times per MTP when the N data blocks are repeatedly scheduled for transmission in multiple MTPs.

15. The method of claim 14, wherein the network element in the access network schedules the N data blocks one or more times within one MTP, comprising:

One PDCCH signaling DCI schedules PDSCH channels of N data blocks.

16. The method of claim 14 wherein each data block is scheduled for transmission N2 times, N2 being greater than or equal to 1; scheduling the sequence of N2 transmissions of N data blocks in one MTP includes:

the N data blocks are scheduled in turn once as a repeat and repeated N2 times.

17. The method of claim 12, wherein in a dynamic scheduling signaling DCI for dynamically scheduling the N data blocks, the MTP where the current scheduling is located is indicated as a sequence number in the M MTPs for scheduling the N data blocks, or the number of MTPs for scheduling transmission of the N data blocks after the current MTP is indicated.

18. The method of claim 17,

when a data block is scheduled to be transmitted only once in each MTP, the sequence number of the MTP where the current scheduling is located in the M MTPs is the sequence number of the scheduled data block, and the number M of the MTPs is the number of times of the scheduled transmission of the data block.

19. The method of claim 8, characterized in that when the number N of Data blocks scheduled for transmission in one MTP is greater than 1, the access network element also schedules the identification Data-ID of the Data block in the DCI of the Data block. The same Data block has the same identification Data-ID when transmitted in different MTPs.

20. The method as claimed in claim 19, wherein the identification Data-ID of the Data block is the sequence number of a Data block in the N Data blocks.

21. A method for transmitting a service, the method comprising:

22. The method as claimed in claim 21, wherein the access network element indicates Offset information Offset of MTP start position through semi-static signaling or dynamic scheduling signaling DIC; offset information of the starting position of the MTP is not indicated, and the offset information of the starting position of the MTP is zero by default.

23. The method of claim 21, wherein the access network element indicates the MTP number information M in the repetition mode through semi-static signaling or dynamic scheduling signaling DIC; when MTP number information in the repeat mode is not indicated, MTP number information M in the repeat mode is 1 or a protocol specified value by default.

24. The method of claim 21, wherein the access network element indicates the interval information P of two adjacent MTPs in the repetition mode through semi-static signaling or dynamic scheduling signaling DIC; when no P value is indicated, the P value defaults to 1.

25. The method of claim 21, wherein the access network element indicates the number N of data blocks for scheduled transmission in one MTP through semi-static signaling or dynamic scheduling signaling DIC; when N is not indicated, the value of N is 1 by default.

26. The method of claim 21, wherein the access network element indicates the number of times a data block is scheduled for transmission in an MTP by semi-static signaling or dynamic scheduling signaling DIC N2; when N2 is not indicated, the N2 value defaults to 1.

27. A method for transmitting multicast services, the method comprising:

28. The method of claim 27 wherein, when the receiving end detects DCI (downlink control information) for scheduling the received service or Signaling Radio Bearer (SRB) in one MTP, the MTP after the MTP is determined to schedule and transmit the data block for the current MTP transmission according to a sequence number of the current MTP in M MTPs and a value of M indicated in the DCI or an MTP number of the remaining scheduling identical data block after the current MTP.

29. The method of claim 27, further comprising:

30. The method of claim 27, further comprising:

31. The method of claim 27, further comprising:

32. An apparatus for transmitting multicast traffic, the apparatus comprising:

a scheduling unit, configured to perform joint scheduling transmission on N data blocks, where one-time repeated transmission of one data block is one-time level one repeated transmission, and the N data blocks are respectively continuously and repeatedly transmitted M1 times of level one repeated transmission to form one-time level two repeated transmission; m2 times the level two repeat transmission form N data blocks for one joint scheduling transmission.

33. The apparatus of claim 32, wherein the scheduling unit is further configured to indicate the scheduling information by one of the following methods when scheduling the joint scheduling transmission of the N data blocks by using a dynamic scheduling method:

34. The apparatus of claim 33, wherein the scheduling unit is further configured to indicate a number of repeated transmissions M1 of level one through dynamic scheduling signaling DCI or semi-static signaling.

35. An apparatus for transmitting multicast traffic, the apparatus comprising: a scheduling unit and a configuration unit, wherein:

36. The apparatus of claim 35, wherein the configuration unit is further configured to:

configuring length information L of the MTP; or

37. The apparatus of claim 36, further comprising:

(H-SFN*1024+SFN)mod L＝offset；

38. An apparatus for transmitting traffic, the apparatus comprising:

39. The apparatus of claim 38, wherein the indicating unit is further configured to indicate Offset information Offset of MTP starting position through semi-static signaling or dynamic scheduling signaling DIC;

40. The apparatus of claim 39, wherein the means for indicating is further configured to indicate the MTP number information M in the repetition mode through semi-static signaling or dynamic scheduling signaling (DIC); the determining unit is further configured to determine that MTP number information M in the repetition mode is 1 or a protocol specified value by default when the indicating unit does not indicate MTP number information in the repetition mode.

41. The apparatus of claim 40, wherein the means for indicating is further configured to indicate the interval information P of two adjacent MTPs in the repetition mode through semi-static signaling or dynamic scheduling signaling (DIC); the determining unit is further configured to default the P value to 1 when the indicating unit does not indicate the P value.