CN107920333B - Multicast scheduling method, HARQ (hybrid automatic repeat request) information receiving method, user equipment and base station - Google Patents

Multicast scheduling method, HARQ (hybrid automatic repeat request) information receiving method, user equipment and base station Download PDF

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Publication number
CN107920333B
CN107920333B CN201610879029.0A CN201610879029A CN107920333B CN 107920333 B CN107920333 B CN 107920333B CN 201610879029 A CN201610879029 A CN 201610879029A CN 107920333 B CN107920333 B CN 107920333B
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information
multicast
data
base station
bias
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CN107920333A (en
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陈亚迷
王森
孙军帅
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China Mobile Communications Group Co Ltd
China Mobile Communications Ltd Research Institute
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China Mobile Communications Group Co Ltd
China Mobile Communications Ltd Research Institute
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/121—Wireless traffic scheduling for groups of terminals or users
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

The embodiment of the invention discloses a multicast scheduling method, UE and a base station, wherein the method comprises the following steps: UE receives multicast scheduling information of multicast service; the multicast scheduling information comprises bias information of the UE; the bias information of the UE is used for indicating that the data to be processed of the UE is selected and received from the multicast data packet, or indicating the wireless resources adopted when the UE uploads the data to the base station; when receiving the multicast service, the UE receives the data to be processed according to the bias information of the UE; or the UE uploads data to the base station according to the bias information of the UE. Therefore, in the downlink direction, the UE can set differentiated resource allocation for the UE according to the received scheduling information, quickly find data belonging to the UE, and save resources of the UE; in the uplink direction, the probability of collision of data uploaded by multiple UEs can be reduced.

Description

Multicast scheduling method, HARQ (hybrid automatic repeat request) information receiving method, user equipment and base station
Technical Field
The present invention relates to multicast technologies, and in particular, to a multicast scheduling method, a Hybrid Automatic Repeat reQuest (HARQ) information receiving method, User Equipment (UE), and a base station.
Background
In the field of wireless Communication, a large number of mobile internet small data messages, such as WeChat text fragments, keep-alive messages and the like, exist, and with the continuous development of wireless Communication technology, a large number of internet of things devices, such as a large number of internet of things devices appearing in a massive Machine Type Communication (mMTC) scene, mostly transmit small data packet information; at this time, there is a large amount of small data in the network, which results in fragmentation of network resources.
In the prior art, a resource allocation entity such as a base station can be used for realizing network resource scheduling, and small data packets facing a plurality of users within one time can be bundled and distributed to each UE, so that the network scheduling resource overhead can be saved; for example, multicast techniques may be employed to send data packets to various UEs; fig. 1 is a schematic diagram of a data structure of multicast scheduling in the prior art, as shown in fig. 1, a resource allocation entity, such as a base station, may distribute a data packet to each UE by using a multicast technology, where an Identifier used in the multicast scheduling may be a Group-call Radio Network Temporary Identifier (G-RNTI), and the data packet distributed to each UE by the resource allocation entity includes data 1 to data N, where the data N represents an nth data in the data packet distributed to each UE by the resource allocation entity, N is a natural number less than or equal to N, and N is a natural number greater than 1.
However, the existing multicast technology has a problem in that, at the receiving end, each UE needs to try to demodulate all data in the data packet facing the multicast packet in order to find data belonging to the UE, which increases resource consumption and power consumption of the UE.
Disclosure of Invention
In order to solve the above technical problems, embodiments of the present invention are expected to provide a multicast scheduling method, an HARQ information receiving method, a UE and a base station, which can save resource consumption of the UE.
The technical scheme of the invention is realized as follows:
the embodiment of the invention provides a multicast scheduling method, which comprises the following steps:
UE receives multicast scheduling information of multicast service; the multicast scheduling information comprises bias information of the UE; the bias information of the UE is used for indicating that the data to be processed of the UE is selected and received from the multicast data packet, or indicating the wireless resources adopted when the UE uploads the data to the base station;
when receiving the multicast service, the UE receives the data to be processed according to the bias information of the UE; or the UE uploads data to the base station according to the bias information of the UE.
In this embodiment of the present invention, the multicast scheduling information further includes common scheduling information used for indicating channel transmission resources of the multicast service.
In the embodiment of the invention, the bias information of the UE corresponds to the identification information of the UE;
accordingly, the method further comprises: and the UE determines the offset information of the UE in the multicast scheduling information according to the pre-acquired identification information of the UE and the corresponding relation between the identification information of the UE and the offset information of the UE.
In the embodiment of the invention, the multicast scheduling information corresponds to the identification information of the multicast service;
accordingly, the method further comprises: and the UE determines the multicast scheduling information to be received according to the predetermined identification information of the multicast service and the corresponding relation between the identification information of the multicast service and the multicast scheduling information.
In the embodiment of the invention, the identification information of the multicast service is the G-RNTI corresponding to the multicast service.
In this embodiment of the present invention, the bias information of the UE is radio resource configuration information corresponding to the identification information of the UE, where the radio resource configuration information includes at least one of: space resource configuration information, time resource configuration information, frequency resource configuration information, and code word resource configuration information.
In the embodiment of the present invention, the radio resource configuration information corresponding to the identification information of the UE is used to indicate the location information of the to-be-processed data of the UE in the multicast data packet.
In the embodiment of the invention, the transmission mode of the multicast data packet is a non-orthogonal transmission mode;
correspondingly, the offset information of the UE is a transmission parameter of a non-orthogonal transmission mode corresponding to the identification information of the UE.
In the embodiment of the present invention, the method further includes: the UE receives multicast scheduling information of a hybrid automatic repeat request (HARQ); the multicast scheduling information of the HARQ is used for indicating that the HARQ information of the UE is selected and received from the multicast retransmission data packet;
and the UE receives the HARQ information of the UE according to the multicast scheduling information of the HARQ.
In the embodiment of the invention, the UE receives the HARQ information of the UE and the data to be processed of the UE, and the UE is positioned in a multicast group which is different from the multicast group.
The embodiment of the invention also provides a multicast scheduling method, which comprises the following steps:
the base station sends the multicast scheduling information to each user equipment UE receiving the multicast service; the multicast scheduling information comprises bias information of each UE receiving the multicast service; the bias information of each UE is used for indicating to select and receive the data to be processed of the corresponding UE from the multicast data packet, or indicating the wireless resources adopted when the corresponding UE uploads the data to the base station;
the base station distributes the multicast data packet to each UE receiving the multicast service; or the base station receives the data uploaded by each UE.
In this embodiment of the present invention, the multicast scheduling information further includes common scheduling information used for indicating channel transmission resources of the multicast service.
In the embodiment of the present invention, the sending, by the base station, the multicast scheduling information to each UE that receives a multicast service includes: the base station sends Downlink Control Information (DCI) to each UE receiving the multicast service, wherein the DCI carries the multicast scheduling Information.
In this embodiment of the present invention, the offset information of each UE is: radio resource configuration information corresponding to identification information of a corresponding UE, the radio resource configuration information including at least one of: space resource configuration information, time resource configuration information, frequency resource configuration information, and code word resource configuration information.
In the embodiment of the present invention, the radio resource configuration information corresponding to the identification information of each UE is used to indicate the location information of the to-be-processed data of the corresponding UE in the multicast data packet.
In this embodiment of the present invention, the offset information of each UE is: a transmission parameter of a non-orthogonal transmission mode corresponding to the identification information of the corresponding UE;
correspondingly, the transmission mode of the multicast data packet is a non-orthogonal transmission mode.
The embodiment of the invention also provides the UE, which comprises a receiving module and a first processing module; wherein the content of the first and second substances,
the receiving module is used for receiving multicast scheduling information of the multicast service; the multicast scheduling information comprises bias information of the UE, and the bias information of the UE is used for indicating that the data to be processed of the UE is selected and received from the multicast data packet or indicating wireless resources adopted when the UE uploads the data to a base station;
a first processing module, configured to receive data to be processed of the UE according to the offset information of the UE when receiving the multicast service; or, the method is used for uploading data to the base station according to the bias information of the UE.
In this embodiment of the present invention, the multicast scheduling information further includes common scheduling information used for indicating channel transmission resources of the multicast service.
In the embodiment of the invention, the bias information of the UE corresponds to the identification information of the UE;
correspondingly, the first processing module is further configured to determine the bias information of the UE in the multicast scheduling information according to the pre-acquired identification information of the UE and the correspondence between the identification information of the UE and the bias information of the UE.
In the embodiment of the invention, the multicast scheduling information corresponds to the identification information of the multicast service;
correspondingly, the receiving module is further configured to determine multicast scheduling information to be received according to the predetermined identification information of the multicast service and the correspondence between the identification information of the multicast service and the multicast scheduling information.
The embodiment of the invention also provides a base station, which comprises a sending module and a second processing module; wherein the content of the first and second substances,
a sending module, configured to send the multicast scheduling information to each UE receiving a multicast service; the multicast scheduling information comprises bias information of each UE for receiving the multicast service, and the bias information of each UE is used for indicating to select to receive data to be processed of the corresponding UE from the multicast data packet or indicating wireless resources adopted when the corresponding UE uploads the data to the base station;
and the second processing module is used for distributing the multicast data packet to each UE receiving the multicast service, or receiving data uploaded by each UE.
In this embodiment of the present invention, the multicast scheduling information further includes common scheduling information used for indicating channel transmission resources of the multicast service.
In this embodiment of the present invention, the sending module is specifically configured to send DCI to each UE receiving a multicast service, where the DCI carries the multicast scheduling information.
In this embodiment of the present invention, the offset information of each UE is: radio resource configuration information corresponding to identification information of a corresponding UE, the radio resource configuration information including at least one of: space resource configuration information, time resource configuration information, frequency resource configuration information, and code word resource configuration information.
In the embodiment of the present invention, the radio resource configuration information corresponding to the identification information of each UE is used to indicate the location information of the to-be-processed data of the corresponding UE in the multicast data packet.
In this embodiment of the present invention, the offset information of each UE is: a transmission parameter of a non-orthogonal transmission mode corresponding to the identification information of the corresponding UE; correspondingly, the transmission mode of the multicast data packet is a non-orthogonal transmission mode.
In the embodiment of the invention, UE receives multicast scheduling information of multicast service; the multicast scheduling information comprises bias information of the UE; the bias information of the UE is used for indicating that the data to be processed of the UE is selected and received from the multicast data packet, or indicating the wireless resources adopted when the UE uploads the data to the base station; when receiving the multicast service, the UE receives the data to be processed according to the bias information of the UE; or the UE uploads data to the base station according to the bias information of the UE; therefore, in the downlink direction, the UE can set differentiated resource allocation for the UE according to the received scheduling information, quickly find data belonging to the UE, and save resources of the UE; in the uplink direction, the probability of collision of data uploaded by multiple UEs can be reduced.
Drawings
Fig. 1 is a diagram illustrating a data structure of multicast scheduling in the prior art;
fig. 2 is a flowchart of a multicast scheduling method according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a data structure of multicast scheduling in an embodiment of the present invention;
FIG. 4 is a schematic diagram of a UE according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a base station according to an embodiment of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
In the embodiment of the present invention, the scheduling of the multicast resource may be implemented by an independent resource allocation entity, and the following description will take the resource allocation entity as a base station as an example. When a base station distributes shared resources facing a plurality of UEs, the base station firstly sends multicast scheduling information of multicast services to each UE, and sets differentiated resource configuration for each UE in the multicast scheduling information, for example, differentiated time-frequency configuration of each UE in the shared resources, or Sparse Code words adopted when a non-orthogonal transmission mode is adopted to send data to the UE, wherein the non-orthogonal transmission mode can be a transmission mode of Sparse Code Multiple Access (SCMA); it can be seen that each UE can set differentiated resource allocation for itself according to the received scheduling information, quickly find and receive its own data to be processed, and perform the next processing, such as demodulation processing, only on its own data to be processed; in addition, the multicast scheduling information may also indicate a radio resource used when the UE uploads data to the base station, and accordingly, the UE may upload data to the base station according to its own bias information; thus, the resource consumption of the UE can be saved, and meanwhile, the network resource consumption can be saved.
First embodiment
A first embodiment of the present invention provides a multicast scheduling method, and fig. 2 is a flowchart of the multicast scheduling method according to the embodiment of the present invention, and as shown in fig. 2, the flowchart includes:
step 201: the base station sends the multicast scheduling information to each UE receiving the multicast service, and the multicast data packet transmitted by the multicast service comprises: receiving data to be processed of each UE of the multicast service; the multicast scheduling information includes offset information of each UE receiving the multicast service, and the offset information of each UE is used to indicate to select to receive data to be processed of a corresponding UE from the multicast data packet, or to indicate a radio resource used when the corresponding UE uploads the data to the base station.
Here, the number of UEs receiving the multicast service may be greater than 1, and it can be seen that the described multicast scheduling information includes offset information of at least two UEs; the role of the offset information of each UE includes: determining data to be processed of corresponding UE in the multicast data packet, or indicating wireless resources adopted when the corresponding UE uploads the data to a base station; for example, if any UE is denoted as UE1, the offset information of UE1 is used to select to receive a pending data from the multicast data packet, or to indicate the radio resource used by UE1 to upload data to the base station; here, the received to-be-processed data is selected to be the to-be-processed data of the UE 1.
In actual implementation, the base station may receive data to be sent to each UE from the core network, and bundle or encapsulate the received data to be sent to each UE to generate a multicast data packet; and then, generating corresponding multicast scheduling information according to the multicast data packet.
Here, the multicast scheduling information corresponds to identification information of the multicast service, for example, the identification information of the multicast service is a G-RNTI corresponding to the multicast service.
Here, the multicast scheduling information further includes common scheduling information for indicating channel transmission resources of the multicast service; in practical applications, the common scheduling information is used to determine each UE receiving the multicast service and channel transmission parameters used when transmitting data to each UE receiving the multicast service.
In some cases, the offset Information and the common scheduling Information of each UE are not strictly bound on physical resources, and in order to facilitate simultaneous transmission of the offset Information and the common scheduling Information of each UE, a new Downlink Control Information (DCI) transmission mode may be designed.
Specifically, the base station may send DCI to each UE receiving a multicast service, where the DCI carries the multicast scheduling information; that is, the offset information of each UE is simultaneously carried with the common scheduling information in the DCI.
The offset information of each UE corresponds to the identity information of the corresponding UE, that is, when any UE is denoted as UE2, the offset information of UE2 corresponds to the identity information of UE2, for example, the identity information of UE2 is C-RNTI of UE2 or G-RNTI of multicast service corresponding to UE 2.
The offset information for each UE is illustrated in two cases below.
First case
The offset information for each UE is: wireless resource configuration information corresponding to the identification information of the corresponding UE; and the wireless resource configuration information corresponding to the identification information of each UE is used for determining the data to be processed of the corresponding UE in the multicast data packet, or is used for indicating the wireless resources adopted when the corresponding UE uploads the data to the base station. In practical implementation, the radio resource configuration information corresponding to the identification information of each UE includes at least one of the following: space resource configuration information, time resource configuration information, frequency resource configuration information and code word resource configuration information; further, the radio resource configuration information corresponding to the identification information of each UE is used to indicate the location information of the to-be-processed data of the corresponding UE in the multicast data packet.
That is to say, for any UE, the offset information of the UE may be radio resource configuration information corresponding to identification information of the UE, where the radio resource configuration information corresponding to the identification information of the UE is used to determine data to be processed of the UE in the multicast data packet, or is used to indicate radio resources used when the corresponding UE uploads data to the base station.
For example, the base station needs to send multicast shared resources to M UEs, where M is a natural number greater than 1; the value of the radio resource configuration information corresponding to the identification information of the mth UE is 0,1, …, M-1; here, M is a natural number equal to or less than M; when the radio resource configuration information corresponding to the identifier information of the mth UE is q, the radio resource configuration information may determine, in the multicast packet, the q +1 th data to be processed as the data to be processed of the mth UE, where q is 0,1, …, and M-1.
Second case
The offset information for each UE may be: transmission parameters of a non-orthogonal transmission mode corresponding to the identification information of the UE, for example, the transmission parameters may be sparse codewords; the sparse code words of the non-orthogonal transmission mode are used for determining data to be processed of corresponding UE in the multicast data packet, or used for representing wireless resources adopted when the corresponding UE uploads the data to a base station; correspondingly, the base station may transmit the multicast data packet to each UE receiving the multicast service in a non-orthogonal transmission manner.
Here, the data to be processed determined by the sparse codeword in the non-orthogonal transmission mode is data to be processed corresponding to the UE, for example, the base station needs to send multicast shared resources to M UEs, where M is a natural number greater than 1; the data to be processed determined by the sparse code word of the non-orthogonal transmission mode corresponding to the identification information of the mth UE is as follows: data to be processed of the mth UE.
In practical implementation, the identification information of the UE may be C-RNTI or G-RNTI corresponding to the multicast service.
It should be noted that the identification information of each UE may be different from the identification information of the multicast service, or may be the same as the identification information of the multicast service; when the identification information of each UE is the identification information of the multicast service, the data to be processed determined according to the offset information of each UE in the multicast data packet is the same because the identification information of each UE is the same.
Further, the base station may scramble the multicast data packet and the multicast scheduling information and then transmit the multicast data packet and the multicast scheduling information to each UE; the base station and each UE can predetermine the scrambling mode of the multicast data packet and the multicast scheduling information, wherein, the scrambling mode of the multicast data packet and the multicast scheduling information can be the same or different; for example, the multicast scheduling information includes offset information of each UE, and the offset information of each UE is used to determine to-be-processed data of the corresponding UE in the multicast data packet; at this time, the scrambling mode of the multicast data packet is scrambling by using the identification information of the multicast service, and the scrambling mode of the offset information of each UE is scrambling by using the identification information of the corresponding UE; for example, the scrambling mode of the multicast data packet is to scramble by using G-RNTI of the multicast service, and the scrambling mode of the offset information of each UE is to scramble by using C-RNTI of the corresponding UE or G-RNTI of the multicast service.
In particular, the identification information of each UE is the same as the identification information of the multicast service, the multicast data packet and the offset information of each UE use the same scrambling method, and the data to be processed determined according to the offset information of each UE in the multicast data packet is the same.
Step 202: when each UE receives the multicast service, receiving the data to be processed according to the bias information of the UE; or each UE uploads data to the base station according to the own bias information.
Here, after the base station distributes the multicast data packet to each UE receiving the multicast service, each UE may receive the multicast service.
In one embodiment, the base station may start a timer after transmitting the multicast scheduling information to each UE, and distribute the multicast data packet to each UE after the time of the timer is reached; the timing time of the timer may be preset.
In another embodiment, each UE sends reception confirmation information to the base station after receiving the multicast scheduling information; after receiving the receiving confirmation information sent by each UE receiving the multicast service, the base station distributes the multicast data packet to each UE receiving the multicast service.
Here, the base station needs to distribute the multicast data packet to the at least two UEs by using a multicast technique.
Further, when the multicast scheduling information includes a transmission parameter of a non-orthogonal transmission mode corresponding to the identification information of each UE, the base station needs to distribute the multicast data packet to each UE receiving the multicast service in the non-orthogonal transmission mode.
In practical application, the multicast scheduling information corresponds to the identification information of the multicast service, and each UE may determine the multicast scheduling information to be received according to the predetermined identification information of the multicast service and the corresponding relationship between the identification information of the multicast service and the multicast scheduling information.
Here, the multicast scheduling information corresponds to identification information of the multicast service. Correspondingly, for any UE, determining own bias information in the multicast scheduling information according to the pre-acquired own identification information and the corresponding relation between the own identification information and the own bias information.
In a specific embodiment, after the UE receives the multicast scheduling information, the UE may descramble the multicast scheduling information according to a scrambling manner of the multicast scheduling information known in advance, so as to extract common scheduling information used for indicating a channel transmission resource of the multicast service and scrambled offset information of each UE receiving the multicast service; then, the UE may also descramble the own offset information according to a scrambling manner of the own offset information known in advance, so as to extract the own offset information.
Further, each UE demodulates its own data to be processed after determining its own data to be processed.
That is, after sending the multicast data packet to a UE, the UE only receives the data to be processed in the multicast data packet, and processes the data to be processed, such as performing demodulation processing; the UE does not receive data other than its own pending data in the multicast data packet.
For example, the base station needs to send a multicast data packet to P UEs, where the multicast data packet includes P pieces of data to be processed, and P is a natural number greater than 1; the P pieces of data to be processed are respectively represented as data 1 to data P, and for the pth UE, one data packet of the data 1 to the data P may be determined as its own data to be processed, and the rest of the data to be processed may be determined as unprocessed data, where P is 1 to P; the p-th UE only receives the self data to be processed and does not receive the rest data to be processed.
In this step, each UE may upload corresponding data to the base station according to the bias information of the corresponding UE in the multicast scheduling information, where the bias information of each UE may be used to indicate a radio resource used when the corresponding UE performs uplink feedback; it should be noted that the content of the data uploaded to the base station by each UE is not limited.
Here, since the offset information of each UE may be used to indicate a radio resource used when the corresponding UE uploads data to the base station, and different offset information corresponds to different radio resources; in this way, the probability of collision when a plurality of UEs upload data to the base station can be reduced.
It can be understood that any UE can also perform uplink feedback to the base station after receiving its own data to be processed; that is, the UE may perform uplink feedback for the multicast service; for example, the UE may perform Hybrid Automatic Repeat reQuest (HARQ) information interaction with the base station.
Here, the offset information of each UE is further used to indicate a radio resource used when the corresponding UE performs uplink feedback.
Correspondingly, after receiving the data to be processed of each UE, each UE adopts the wireless resource indicated by the bias information of each UE to perform uplink feedback; here, the radio resource indicated by the offset information of each UE includes at least one of: space resources, time resources, frequency resources, codeword resources;
specifically, the radio resources indicated by the offset information of each UE are different from each other, that is, the radio resources indicated by the offset information of each UE receiving the multicast service are different from each other; for example, when the radio resource indicated by the offset information of each UE is a time resource, any two UEs may perform uplink feedback at different times.
It can be seen that, since the radio resources indicated by the bias information of each UE are different from each other, when multiple UEs perform uplink feedback to the base station, the probability of collision of the uploaded data when the multiple UEs perform uplink feedback can be reduced.
It should be noted that, after receiving the data to be processed, any UE may not perform uplink feedback to the base station.
In the embodiment of the invention, a base station can receive uplink feedback information of at least one UE; here, the uplink feedback information of the UE refers to: and the UE uploads the data or information when performing uplink feedback to the base station.
In the embodiment of the invention, in the downlink direction, the UE can set differentiated resource allocation for the UE according to the received scheduling information, quickly find data belonging to the UE, and save the resources of the UE; in the uplink direction, the probability of collision of data uploaded by multiple UEs can be reduced.
Second embodiment
To further illustrate the object of the present invention, the first embodiment of the present invention is further illustrated.
The second embodiment of the present invention provides a method for transmitting and receiving HARQ information, that is, the method for transmitting and receiving HARQ information includes a method for transmitting HARQ information and a method for receiving HARQ information.
For the transmission method of HARQ information, for example, in the uplink direction, the UE may transmit HARQ information to the base station; here, the HARQ information transmission method may follow a synchronous HARQ transmission method in a Long Term Evolution (LTE) network.
As for the reception method of HARQ information, illustratively, an asynchronous HARQ reception method may be employed; the scheduling method used when receiving HARQ information may use the multicast scheduling method in the first embodiment of the present invention.
Specifically, the method for receiving HARQ information includes:
UE receives the multicast scheduling information of HARQ; the multicast scheduling information of the HARQ is used for indicating that the HARQ information of the UE is selected and received from the multicast retransmission data packet; and the UE receives the HARQ information of the UE according to the multicast scheduling information of the HARQ.
That is to say, the base station may use the HARQ technology to issue the multicast retransmission data packet to the UE, further, the base station may use a multicast mode to issue the multicast retransmission data packet, and the implementation mode of issuing the multicast retransmission data packet by the base station is the same as the implementation mode of sending the multicast data packet in the first embodiment of the present invention.
Here, the HARQ information of the UE indicates data requested to be retransmitted by the UE, and in actual implementation, the UE may select and receive HARQ information of the UE from a multicast retransmission packet according to the multicast scheduling information of HARQ.
Here, the data to be processed received by the UE includes service data and HARQ data, and the multicast group in which the UE is located when receiving the HARQ information of the UE and the service data of the UE may be the same or different; for example, when the UE receives its service data, the corresponding identification information is G-RNTI1, and when the UE receives its HARQ information, the corresponding identification information may be G-RNTI2, G-RNTI1 and G-RNTI2 respectively indicate G-RNTI corresponding to the multicast service, and G-RNTI1 is different from G-RNTI 2.
Third embodiment
To further illustrate the object of the present invention, the first embodiment of the present invention is further exemplified.
In the third embodiment of the present invention, the network side device needs to distribute the multicast data packet and the multicast scheduling information to a plurality of UEs, and the following description will take the network side device as a base station as an example.
The base station can distribute multicast data packets and multicast scheduling information to M UEs in a multicast mode, wherein M is a natural number greater than 1; here, the identifier used in multicast scheduling may be G-RNTI (i.e., scrambled by G-RNTI), or may include C-RNTI of each UE, and the base station may also distribute the multicast packet and multicast scheduling information to the UEs by a broadcast method or other methods.
Here, the multicast data packet is used to indicate user data to be received by each UE, and the multicast scheduling information includes offset information of each UE; preferably, when the identifier used in multicast scheduling is G-RNTI, the bias information of each UE may include a user-specific identifier of the UE, or may also be G-RNTI, for example, the user-specific identifier of the UE is C-RNTI.
For example, a periodic multicast data packet includes M sub-resources, and can support multicast data transmission to M UEs, and then, the bias information of any UE of the M UEs may take a value of 0,1, …, M-1; that is, one multicast data packet includes M pieces of data to be processed, and can support multicast data transmission to M UEs, so that the multicast scheduling information includes offset information of each UE of the M UEs, and a value of the offset information of any UE of the M UEs may be 0,1, …, or M-1.
Fig. 3 is a schematic diagram of a data structure of multicast scheduling in an embodiment of the present invention, as shown in fig. 3, an identifier used in multicast scheduling is G-RNTI, bias information of each UE is its C-RNTI, a multicast data packet includes N pieces of data to be processed, and can support multicast data transmission to the N UEs, where N is a natural number greater than 1, and the N pieces of data to be processed are respectively represented as data 1 to data N, where N represents an nth piece of data to be processed in the multicast data packet, N is a natural number less than or equal to N, and N is a natural number greater than 1; the multicast scheduling information includes offset information of each UE of the N UEs, and a value of the offset information of any UE of the N UEs may be 1,2, …, N.
It can be understood that, if the identifier used in multicast scheduling and the offset information of each UE are both G-RNTI, and the data that each UE needs to perform demodulation processing is the same data, there is no need to additionally indicate the offset information of each UE.
When each UE (i.e. end user) receives the multicast service, it may extract its own offset information from the multicast scheduling information according to the scrambling manner of the multicast scheduling information and its own offset information, for example, the value of the offset information of the UE is 2.
Each UE determines its own to-be-processed data in the multicast data packet according to the extracted own bias information, for example, the multicast data packet includes M sub-resources and can support multicast data transmission to M UEs, and a value of the bias information of any one UE of the M UEs may be 0,1, …, M-1; the value of the offset information of the UE is 2, and the 3 rd sub-resource is determined as the data to be processed in the multicast data packet.
Further, an effective time period may be set for the bias information of each UE, in the effective time period, each UE may determine its own to-be-processed data according to its own bias information, and in the remaining time periods, each UE may not determine its own to-be-processed data according to its own bias information; the effective time period of the bias information of each UE may default to a time period for performing multicast scheduling, or may be further indicated by multicast scheduling information, that is, the multicast scheduling information indicates the timeliness of the bias information of each UE; when the offset Information of at least one UE acquired by the base station is changed, the base station further sends a message to the corresponding UE to indicate the modification of the corresponding offset Information and indicate the corresponding UE to reacquire the offset Information of the corresponding UE (corresponding user rereads the offset Information), where the message sent by the base station to the UE may be a Downlink Control Information (DCI).
In the prior art, common scheduling information and offset information of each UE are not strictly bound on physical resources, and to address this problem, in the embodiment of the present invention, a DCI design method supporting the above-mentioned multicast scheduling method is further proposed, that is, the common scheduling information and the offset information of each UE are sent to each UE through DCI, that is, the common scheduling information and the offset information of each UE are simultaneously carried in DCI sent to the UE by a base station.
Fourth embodiment
To further illustrate the object of the present invention, the first embodiment of the present invention is further exemplified.
In the fourth embodiment of the present invention, the base station needs to send the multicast data packet to a group of non-orthogonal access users by using a non-orthogonal transmission method, that is, the base station sends the multicast data packet to each UE by using a non-orthogonal transmission method; accordingly, the multicast scheduling information includes: a sparse code word of a non-orthogonal transmission mode corresponding to the identification information of each UE, wherein the sparse code word of the non-orthogonal transmission mode is used for determining data to be processed in the multicast data packet; it can be seen that since the existing sparse code words of the non-orthogonal transmission mode can be used to implement differentiated resource allocation among the UEs, there is no need to additionally perform differentiated resource allocation for the UEs, and network resources can be saved.
Specifically, the base station already knows the relevant information required by user scheduling and pairing, and according to the information, the base station executes scheduling and non-orthogonal pairing processes on the activated users in the cell according to a certain criterion; after scheduling and pairing are completed, the base station scrambles the common scheduling information of the non-orthogonal paired users in the same group by using the same G-RNTI, scrambles the common scheduling information of the non-orthogonal paired users in different groups by using different G-RNTIs, and scrambles offset information (user-specific control information) of each UE by using the C-RNTI.
When each UE receives multicast scheduling information, descrambling the public scheduling information of the non-orthogonal paired users in the corresponding group according to the G-RNTI to obtain the public transmission parameters of the non-orthogonal paired users in the corresponding group and the bias information of each UE; and then descrambling the self offset information according to the self C-RNTI to obtain the descrambled self offset information.
That is, each UE may determine its own to-be-processed data in the multicast data packet according to the common scheduling information and its own bias information.
Further, after determining the data to be processed of each UE, each UE may perform the next processing on the data to be processed of each UE, and may interact with the base station to implement a Hybrid Automatic Repeat reQuest (HARQ) process.
In the HARQ process, in the uplink direction, a synchronous HARQ process in a Long Term Evolution (LTE) system may be used, so that collisions of different data from different UEs may be reduced; in the downlink direction, an asynchronous HARQ process is adopted, where the asynchronous HARQ process may adopt the above multicast scheduling method for the base station, where a group of retransmitted users in which one UE is located may be different from a group of users in the previous transmission, that is, after the base station transmits to the UE corresponding to G-RNTI1 for the first time, when the base station retransmits to the UE corresponding to G-RNTI1, the UE corresponding to G-RNTI1 may belong to G-RNTI2, where G-RNTI1 and G-RNTI2 are two different G-RNTIs, that is, differential resource scheduling may be performed in the retransmission.
It can be seen that the fourth embodiment of the present invention can provide more scheduling information through the network, and on the downlink, it is convenient for the user to quickly find the data belonging to the user in the multicast, and the power consumption of the UE can be saved; in uplink, the collision of users sharing multicast resources can be reduced, so that the embodiment of the invention can be better applied to a plurality of large and small connection data with energy saving requirements, non-orthogonal transmission and other scenes.
Fifth embodiment
A fifth embodiment of the present invention provides a UE for a multicast scheduling method according to the first embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a UE according to an embodiment of the present invention, and as shown in fig. 4, the UE includes a receiving module 401 and a first processing module 402; wherein the content of the first and second substances,
a receiving module 401, configured to receive multicast scheduling information of a multicast service; the multicast scheduling information comprises bias information of the UE, and the bias information of the UE is used for indicating that the data to be processed of the UE is selected and received from the multicast data packet or indicating wireless resources adopted when the UE uploads the data to a base station;
a first processing module 402, configured to receive data to be processed of the UE according to the offset information of the UE when receiving the multicast service; or, the method is used for uploading data to the base station according to the bias information of the UE.
Further, the multicast scheduling information further includes common scheduling information for indicating channel transmission resources of the multicast service.
Optionally, the offset information of the UE corresponds to the identification information of the UE; correspondingly, the first processing module 402 is further configured to determine the bias information of the UE in the multicast scheduling information according to the pre-acquired identification information of the UE and the correspondence between the identification information of the UE and the bias information of the UE.
Optionally, the multicast scheduling information corresponds to the identifier information of the multicast service; correspondingly, the receiving module 401 is further configured to determine multicast scheduling information to be received according to the predetermined identifier information of the multicast service and the corresponding relationship between the identifier information of the multicast service and the multicast scheduling information.
Those skilled in the art will understand that the functions implemented by the modules of the UE shown in fig. 4 can be understood by referring to the related description of the multicast scheduling method. The functions of the modules of the UE shown in fig. 4 may be implemented by a program running on a processor, or may be implemented by specific logic circuits.
Sixth embodiment
A sixth embodiment of the present invention provides a base station for a multicast scheduling method according to the first embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a base station according to an embodiment of the present invention, and as shown in fig. 5, the base station includes a sending module 501 and a second processing module 502; wherein the content of the first and second substances,
a sending module 501, configured to send the multicast scheduling information to each UE receiving a multicast service; the multicast scheduling information comprises bias information of each UE for receiving the multicast service, and the bias information of each UE is used for indicating to select to receive data to be processed of the corresponding UE from the multicast data packet or indicating wireless resources adopted when the corresponding UE uploads the data to the base station;
a second processing module 502, configured to distribute the multicast data packet to each UE receiving a multicast service; or receiving data uploaded by each UE.
Further, the multicast scheduling information further includes common scheduling information for indicating channel transmission resources of the multicast service.
Optionally, the sending module 501 is specifically configured to send downlink control information DCI to each UE receiving a multicast service, where the DCI carries the multicast scheduling information.
Optionally, the offset information of each UE is: radio resource configuration information corresponding to identification information of a corresponding UE, the radio resource configuration information including at least one of: space resource configuration information, time resource configuration information, frequency resource configuration information, and code word resource configuration information.
Optionally, the radio resource configuration information corresponding to the identification information of each UE is used to indicate location information of the to-be-processed data of the corresponding UE in the multicast data packet.
Optionally, the offset information of each UE is: a transmission parameter of a non-orthogonal transmission mode corresponding to the identification information of the corresponding UE; correspondingly, the transmission mode of the multicast data packet is a non-orthogonal transmission mode.
Those skilled in the art will understand that the implementation functions of the modules of the base station shown in fig. 5 can be understood by referring to the related description of the multicast scheduling method. The functions of the modules of the base station shown in fig. 5 may be implemented by a program running on a processor, or may be implemented by specific logic circuits.
The technical schemes described in the embodiments of the present invention can be combined arbitrarily without conflict.
In the embodiments provided in the present invention, it should be understood that the disclosed method and intelligent device 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 second 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.
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.

Claims (23)

1. A method for multicast scheduling, the method comprising:
user Equipment (UE) receives multicast scheduling information of a multicast service; the multicast scheduling information comprises bias information of at least two UEs; the bias information of the UE is used to instruct to select to receive data to be processed of the UE from a multicast data packet transmitted by the multicast service, or is used to instruct a radio resource used when the UE uploads data to a base station, and different bias information corresponds to different radio resources;
when receiving the multicast service, the UE receives the data to be processed according to the bias information of the UE; or the UE uploads data to the base station according to the bias information of the UE;
setting an effective time period by the bias information of the UE, wherein the effective time period is a time period for performing multicast scheduling by default or is indicated by the multicast scheduling information; the transmission mode of the multicast data packet is a non-orthogonal transmission mode; correspondingly, the offset information of the UE is a transmission parameter of a non-orthogonal transmission mode corresponding to the identification information of the UE.
2. The method of claim 1, wherein the multicast scheduling information further comprises common scheduling information indicating channel transmission resources of the multicast service.
3. The method of claim 1, wherein the offset information of the UE corresponds to identity information of the UE;
accordingly, the method further comprises: and the UE determines the offset information of the UE in the multicast scheduling information according to the pre-acquired identification information of the UE and the corresponding relation between the identification information of the UE and the offset information of the UE.
4. The method of claim 1, wherein the multicast scheduling information corresponds to identification information of the multicast service;
accordingly, the method further comprises: and the UE determines the multicast scheduling information to be received according to the predetermined identification information of the multicast service and the corresponding relation between the identification information of the multicast service and the multicast scheduling information.
5. The method of claim 4, wherein the identification information of the multicast service is a group call radio network temporary identifier (G-RNTI) corresponding to the multicast service.
6. The method according to any of claims 1 to 5, wherein the offset information of the UE is radio resource configuration information corresponding to the identification information of the UE, and the radio resource configuration information includes at least one of the following: space resource configuration information, time resource configuration information, frequency resource configuration information, and code word resource configuration information.
7. The method according to claim 6, wherein the radio resource configuration information corresponding to the UE identification information is used to indicate location information of the UE to-be-processed data in the multicast data packet.
8. The method of claim 1, further comprising: the UE receives multicast scheduling information of a hybrid automatic repeat request (HARQ); the multicast scheduling information of the HARQ is used for indicating that the HARQ information of the UE is selected and received from the multicast retransmission data packet;
and the UE receives the HARQ information of the UE according to the multicast scheduling information of the HARQ.
9. The method of claim 8, wherein the UE receives HARQ information of itself and traffic data of itself in a different multicast group.
10. A method for multicast scheduling, the method comprising:
the base station sends the multicast scheduling information to each user equipment UE receiving the multicast service; the multicast scheduling information comprises bias information of each UE receiving the multicast service; the bias information of each UE is used for indicating to select and receive the data to be processed of the corresponding UE from the multicast data packet transmitted by the multicast service, or indicating the wireless resources adopted when the corresponding UE uploads the data to the base station, and different bias information corresponds to different wireless resources;
the base station distributes the multicast data packet to each UE receiving the multicast service; or the base station receives data uploaded by each UE;
setting an effective time period by the bias information of the UE, wherein the effective time period is a time period for performing multicast scheduling by default or is indicated by the multicast scheduling information; the bias information of each UE is: a transmission parameter of a non-orthogonal transmission mode corresponding to the identification information of the corresponding UE; correspondingly, the transmission mode of the multicast data packet is a non-orthogonal transmission mode.
11. The method of claim 10, wherein the multicast scheduling information further includes common scheduling information indicating channel transmission resources of the multicast service.
12. The method of claim 10, wherein the base station sends the multicast scheduling information to each UE receiving the multicast service, and wherein the method comprises: and the base station sends downlink control information DCI to each UE receiving the multicast service, wherein the DCI carries the multicast scheduling information.
13. The method of claim 10, wherein the offset information for each UE is: radio resource configuration information corresponding to identification information of a corresponding UE, the radio resource configuration information including at least one of: space resource configuration information, time resource configuration information, frequency resource configuration information, and code word resource configuration information.
14. The method of claim 13, wherein the identification information of each UE corresponds to radio resource configuration information for indicating location information of pending data of the corresponding UE in the multicast data packet.
15. A User Equipment (UE), characterized in that, the UE comprises a receiving module and a first processing module; wherein the content of the first and second substances,
the receiving module is used for receiving multicast scheduling information of the multicast service; the multicast scheduling information comprises bias information of at least two pieces of UE, wherein the bias information of the UE is used for indicating to select to receive data to be processed of the UE from a multicast data packet transmitted by the multicast service, or indicating wireless resources adopted when the UE uploads the data to a base station, and different bias information corresponds to different wireless resources;
a first processing module, configured to receive data to be processed of the UE according to the offset information of the UE when receiving the multicast service; or, the base station is used for uploading data to the base station according to the bias information of the UE;
setting an effective time period by the bias information of the UE, wherein the effective time period is a time period for performing multicast scheduling by default or is indicated by the multicast scheduling information; the transmission mode of the multicast data packet is a non-orthogonal transmission mode; correspondingly, the offset information of the UE is a transmission parameter of a non-orthogonal transmission mode corresponding to the identification information of the UE.
16. The UE of claim 15, wherein the multicast scheduling information further comprises common scheduling information indicating channel transmission resources for the multicast service.
17. The UE of claim 15, wherein the offset information of the UE corresponds to identity information of the UE;
correspondingly, the first processing module is further configured to determine the bias information of the UE in the multicast scheduling information according to the pre-acquired identification information of the UE and the correspondence between the identification information of the UE and the bias information of the UE.
18. The UE of claim 15, wherein the multicast scheduling information corresponds to identification information of the multicast service;
correspondingly, the receiving module is further configured to determine multicast scheduling information to be received according to the predetermined identification information of the multicast service and the correspondence between the identification information of the multicast service and the multicast scheduling information.
19. A base station, characterized in that the base station comprises a transmitting module and a second processing module; wherein the content of the first and second substances,
a sending module, configured to send the multicast scheduling information to each UE receiving a multicast service; the multicast scheduling information comprises bias information of each UE for receiving the multicast service, wherein the bias information of each UE is used for indicating that to-be-processed data of corresponding UE is selected and received from a multicast data packet transmitted by the multicast service, or indicating wireless resources adopted when the corresponding UE uploads the data to a base station, and different bias information corresponds to different wireless resources;
the second processing module is used for distributing the multicast data packet to each UE receiving the multicast service, or receiving data uploaded by each UE;
setting an effective time period by the bias information of the UE, wherein the effective time period is a time period for performing multicast scheduling by default or is indicated by the multicast scheduling information; the bias information of each UE is: a transmission parameter of a non-orthogonal transmission mode corresponding to the identification information of the corresponding UE; correspondingly, the transmission mode of the multicast data packet is a non-orthogonal transmission mode.
20. The base station of claim 19, wherein the multicast scheduling information further comprises common scheduling information for indicating channel transmission resources of the multicast service.
21. The base station of claim 19, wherein the sending module is specifically configured to send downlink control information DCI to each UE receiving a multicast service, where the DCI carries the multicast scheduling information.
22. The base station of claim 19, wherein the offset information for each UE is: radio resource configuration information corresponding to identification information of a corresponding UE, the radio resource configuration information including at least one of: space resource configuration information, time resource configuration information, frequency resource configuration information, and code word resource configuration information.
23. The base station of claim 22, wherein the identification information of each UE corresponds to radio resource configuration information for indicating location information of pending data of the corresponding UE in the multicast data packet.
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