WO2013034042A1

WO2013034042A1 - Method, base station and user equipment for transmitting control information

Info

Publication number: WO2013034042A1
Application number: PCT/CN2012/079917
Authority: WO
Inventors: 官磊; 吕永霞
Original assignee: 华为技术有限公司
Priority date: 2011-09-08
Filing date: 2012-08-10
Publication date: 2013-03-14
Also published as: CN103002579A; CN103002579B

Abstract

Disclosed are a method, base station and user equipment for transmitting control information. The method comprises: determining a first group to which at least one user equipment belongs; sending a radio resource control RRC message to a user equipment in the first group separately, the RRC message comprising a group identifier of the first group and a location of the user equipment in the first group; forming control information, in a current sub-frame, of at least one scheduled user equipment in the first group into a physical downlink control channel PDCCH signaling; and sending the PDCCH signaling to the at least one scheduled user equipment through a PDCCH. The base station comprises a determining module, a sending module and a forming module. The user equipment comprises a receiving module and an acquiring module. In the method, base station and user equipment for transmitting control information of embodiments of the present invention, a PDCCH signaling bears control information of at least one UE, so that capacity of a PDCCH can be expanded, and system scheduling efficiency and flexibility can be improved.

Description

Method for transmitting control information, base station and user equipment This application claims to be filed on September 8, 2011 with the Chinese Patent Office, application number 201110266174.9, and the invention titled "Method for transmitting control information, base station and user equipment" Priority of the application, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD The present invention relates to the field of communications, and more particularly to a method, base station, and user equipment for transmitting control information in the field of communications. BACKGROUND In a Long Term Evolution (LTE) system, a minimum time unit for scheduling an evolved base station (evolved NodeB, referred to as "eNB") is one subframe, and evolution is performed on one subframe. The base station uses a Physical Downlink Control Channel ("SCH") to carry control information for scheduling user equipment (User Equipment, called "UE"). The control information includes physical channel resources allocated to the UE, and modulation and coding schemes ("MCS") information used in the specific use. After receiving the control signaling transmitted by the PDCCH, the UE parses the relevant control information carried in the signaling, and performs data transmission and reception on the corresponding physical channel according to the indication of the control information.

The PDCCH signaling itself is also carried on a certain physical resource for transmission. Taking a cell with a bandwidth of 5 MHz as an example, in a Transmission Time Interval ("TTI"), there are usually only a dozen control signalings that can be carried for user equipment data scheduling. The command also includes uplink and downlink scheduling signaling. Therefore, it is usually only possible to schedule several to a dozen user devices simultaneously in a single TTI.

With multiple input multiple output (Multiple Input Multiple Output, called "MIMO"), technologies such as Coordinated Multiple Points ("CoMP") are used in LTE. The large number of applications in the system, as well as the extensive application of a large number of small data packet services, the capacity of the PDCCH in the LTE system is limited. Specifically, each UE's data packet needs a corresponding PDCCH scheduling. If the number of UEs is large, and the data packet transmitted by each UE in a single transmission is relatively small, the PDCCH region is saturated and the data channel region is still free. . If the PDCCH region is extended, the PDCCH overhead is large, and the system scheduling efficiency is degraded.

Therefore, a corresponding technical solution is required to expand the capacity of the PDCCH and improve the scheduling efficiency of the system. Summary of the invention

The embodiments of the present invention provide a method for transmitting control information, a base station, and a user equipment, which can implement the expansion of the PDCC H capacity and improve the scheduling efficiency of the system.

In one aspect, the embodiment of the present invention provides a method for transmitting control information, where the method includes: determining a first packet to which at least one user equipment belongs; and transmitting a radio resource control RRC message to a user equipment in the first packet, where The RRC message includes a group identifier of the first packet and a location of the user equipment in the first packet. The control information of the at least one scheduled user equipment in the first packet in the current subframe is formed into a physical downlink control channel PDCCH. Signaling, the PDCCH signaling has a pre-configured payload size, the payload size is reserved according to the M-part control information, each control information in the M-part control information corresponds to one user equipment, and the at least one scheduled user equipment The number of user equipments in the first group is greater than or equal to M, where M is a natural number; the PDCCH signaling is sent to the at least one scheduled user equipment by using a PDCCH.

On the other hand, an embodiment of the present invention provides a method for transmitting control information, where the method includes: receiving, by a user equipment, a radio resource control RRC message sent by a base station, where the RRC message includes first group information of a first packet to which the user equipment belongs Receiving, by the user equipment, PDCCH signaling that is sent by the base station by using a physical downlink control channel PDCCH, where the PDCCH signaling includes control information of at least one scheduled user equipment in the first packet, where the PDCCH signaling has a pre-configured payload size. , The load size is reserved according to the M share control information, each control information in the M pieces of control information corresponds to one user equipment, and the number of the at least one scheduled user equipment is less than or equal to M, the user in the first group The number of devices is greater than or equal to M, where M is a natural number. The user equipment acquires control information related to the user equipment included in the PDCCH signaling according to the first group information and the payload size.

In a further aspect, the embodiment of the present invention provides a base station, where the base station includes: a determining module, configured to determine a first packet to which at least one user equipment belongs; and a sending module, configured to separately determine the first group to the determining module The user equipment is configured to send a radio resource control RRC message, where the RRC message includes a group identifier of the first packet and a location of the user equipment in the first packet, and a forming module, configured to: in the first packet in the current subframe The control information of the at least one scheduled user equipment forms a physical downlink control channel PDCCH signaling, where the PDCCH signaling has a pre-configured payload size, and the payload size is reserved according to the M-part control information, and each of the M-part control information The share control information corresponds to a user equipment, and the number of the at least one scheduled user equipment is less than or equal to M, and the number of user equipments in the first group is greater than or equal to M, where M is a natural number; Transmitting, by the PDCCH, the PDCCH signaling formed by the forming module to the at least one scheduled user equipment

In a further aspect, the embodiment of the present invention provides a user equipment, where the user equipment includes: a receiving module, configured to receive a radio resource control RRC message sent by a base station, where the RRC message includes a first packet of the first packet to which the user equipment belongs The eNB signaling is further configured to receive PDCCH signaling that is sent by the base station by using a physical downlink control channel PDCCH, where the PDCCH signaling includes control information of at least one scheduled user equipment in the first packet, where the PDCCH signaling has Pre-configured load size, the load size is reserved according to the M-part control information, each control information in the M-part control information corresponds to one user equipment, and the number of the at least one scheduled user equipment is less than or equal to M, The number of user equipments in the first group is greater than or equal to M, where M is a natural number; an obtaining module, configured to use the first group information included in the RRC message received by the receiving module, and The load size of the PDCCH signaling received by the receiving module is obtained, and the control information related to the user equipment included in the PDCCH signaling is obtained.

Based on the foregoing technical solution, the method for transmitting control information, the base station, and the user equipment of the embodiment of the present invention, by using one PDCCH signaling, carries control information of at least one UE, so that control information can be transmitted in a combined scheduling manner, thereby expanding the control channel. Capacity, saving control channel overhead, improving system scheduling efficiency and flexibility. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings to be used in the embodiments of the present invention will be briefly described below. Obviously, the drawings described below are only some of the present invention. For the embodiments, those skilled in the art can obtain other drawings according to the drawings without any creative work.

FIG. 1 is a schematic flowchart of a method of transmitting control information according to an embodiment of the present invention. FIG. 2 is a schematic configuration diagram of PDCCH signaling according to an embodiment of the present invention.

3A and 3B are schematic configuration diagrams of PDCCH signaling according to another embodiment of the present invention. 4 is a schematic diagram of configuring at least two group identifications according to an embodiment of the present invention.

FIG. 5 is a schematic flowchart of a method of transmitting control information according to another embodiment of the present invention. FIG. 6 is another schematic flowchart of a method of transmitting control information according to another embodiment of the present invention.

FIG. 7 is still another schematic flow chart of a method of transmitting control information according to another embodiment of the present invention.

FIG. 8 is a schematic block diagram of a base station according to an embodiment of the present invention.

9 is a schematic block diagram of a user equipment according to an embodiment of the present invention.

FIG. 10 is a schematic block diagram of an acquisition module according to an embodiment of the present invention.

11 is another schematic block diagram of a user equipment according to an embodiment of the present invention. The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, but not all embodiments. . All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of the present invention.

It should be understood that the technical solution of the present invention can be applied to various communication systems, for example: Global System of Mobile communication ("GSM") system, Code Division Multiple Access (Code Division Multiple Access) "CDMA") system, Wideband Code Division Multiple Access ("WCDMA") system, General Packet Radio Service (General Packet Radio Service), Long Term Evolution (Long Term Evolution) , the tube is called "LTE" system, LTE frequency division duplex (Frequency Division Duplex), LTE time division duplex (Time Division Duplex, "TDD"), universal mobile communication system (Universal Mobile Telecommunication System, the cartridge is called "UMTS").

It should also be understood that, in the embodiment of the present invention, a user equipment (User Equipment, referred to as "UE") may be referred to as a terminal (Terminal), a mobile station (Mobile Station, referred to as "MS"), and a mobile terminal ( Mobile Terminal), etc., the user equipment can communicate with one or more core networks via a Radio Access Network ("RAN"), for example, the user equipment can be a mobile phone (or "cellular" , a telephone, a computer with a mobile terminal, etc., for example, the user device can also be a portable, pocket, handheld, computer built-in or in-vehicle mobile device that exchanges language and/or data with the wireless access network.

In the embodiment of the present invention, the base station may be a base station (Base Transceiver Station, called "BTS") in GSM or CDMA, or may be a base station (NodeB, called "NB") in WCDMA, or may be An evolved Node B (called "eNB or e_NodeB,") in LTE, The invention is not limited. For convenience of description, the following embodiments will be described by taking a base station eNB and a user equipment UE as an example.

FIG. 1 shows a schematic flow chart of a method of transmitting control information according to an embodiment of the present invention. As shown in Figure 1, the method includes:

S 1 1 0 , determining a first group to which at least one user equipment belongs;

S120. Send a radio resource control (radio resource control) message to the user equipment in the first group, where the RRC message includes the group identifier of the first group and the user equipment is The location within the first group;

S1 30, the control information of the at least one scheduled user equipment in the first packet in the current subframe is formed into a physical downlink control channel PDCCH signaling, where the PDCCH signaling has a pre-configured payload size, and the payload size is in accordance with M The control information is reserved, each control information in the M pieces of control information corresponds to one user equipment, and the number of the at least one scheduled user equipment is less than or equal to M, and the number of user equipments in the first group is greater than or Is equal to M, where M is a natural number;

S140: Send the PDCCH signaling to the at least one scheduled user equipment by using a PDCCH. In order to improve the use efficiency of the control channel, reduce the overhead of the control channel, and improve the efficiency and flexibility of the system scheduling, the base station may group the user equipment, and notify the user equipment of the packet message, and perform control information of the scheduled user equipment. During the transmission, the base station may form control information of the at least one scheduled user equipment into one PDCCH signaling, and send the PDCCH signaling through the PDCCH, so that multiple user equipments may be scheduled by using one control signaling, thereby saving control channel resources and improving Resource utilization efficiency.

Therefore, the method for transmitting control information in the embodiment of the present invention carries control information of at least one UE by using one PDCCH signaling, so that control information can be transmitted in a combined scheduling manner, thereby expanding the capacity of the control channel and saving the overhead of the control channel. Improve system scheduling efficiency and flexibility.

In S 1 1 0, the base station may group the user equipment according to factors such as link status, service related information, and the like. For example, the base station may group UEs with similar downlink qualities into one group, or may The UEs with more concentrated traffic bursts are grouped into one group, or UEs with similar service characteristics may also be grouped into one group. It should be noted that the grouping method actually used by the base station includes, but is not limited to, the method described above, and the base station may adopt one of the methods, or a combination of some or all of the methods.

It should be understood that when the base station performs the grouping by using a specific method, if the base station finds that the UEs that have been divided into one group can no longer continue to be grouped in the same group, the base station can re-group the UE and modify the original group information. .

In S120, the base station sends an RRC message to each user equipment in the first packet, where the RRC message includes packet information of the first packet. For a particular user equipment, the packet information included in the RRC message may be the group identity of the first packet and the location of the particular user equipment within the first packet. That is, the base station sends different RRC messages to different user equipments in the packet. Optionally, the RRC message may further include scheduling mode information, where the scheduling mode information is used to indicate whether the group scheduling mode of the embodiment of the present invention is used.

It should be understood that the location of the user equipment within the packet may include the number or relative location of the user equipment within the packet. It should also be understood that the RRC message used to notify the packet information may be an existing RRC message, such as an RRC Connection Reconfiguration (RRC) message, or a newly added RRC message. The specific transmission parameters used to indicate the group information may use parameters in the existing message, newly added parameters, or some of the existing parameters. It should also be understood that the base station can transmit the same RRC message to the user equipment within the packet, the RRC message including the group identity of the first packet, and the location of each user equipment within the first packet in the first packet.

These RRC messages and indication parameters are merely names used for convenience of description. This name is not limited to the scope applicable to the embodiments of the present invention, that is, there may be no similar names in some systems, but the present invention cannot be considered as such. The technical solutions in the embodiments cannot be applied to these systems.

In S1 30, it is assumed that the first packet includes N user equipments, and in the current subframe, there are P user equipments in the first packet that need to be scheduled. At this time, the base station may control information of the P scheduled user equipments. Forming a PDCCH signaling, the PDCCH signaling having a pre-configured payload size, The load size is reserved according to the M control information. Each control information in the M control information corresponds to one user equipment, and JN > M > P > 1, wherein N, M, and P are natural numbers.

In S140, the base station sends the PDCCH signaling to the at least one scheduled user equipment in the first packet by using a PDCCH, so that the scheduled user equipment can send and receive data according to the control information to the corresponding physical channel.

In the embodiment of the present invention, optionally, the PDCCH signaling further includes a scheduling identifier, where the scheduling identifier is used to indicate whether each user equipment in the first packet is scheduled. Preferably, the scheduling identifier can be identified by a bitmap, and the number of bits included in the scheduling identifier is equal to the number of user equipments in the first packet. That is, the scheduling identifier can be identified by a N bit bitmap (B i tMap ), and the bit set to "1" or "0" can indicate whether the user equipment of the corresponding sequence number is scheduled. Therefore, the UE reads the scheduling identifier of the N bits in the PDCCH signaling, and determines the scheduling identifier of the UE according to the location of the UE in the first packet, and further determines whether the UE is scheduled in the current subframe.

For example, as shown in FIG. 2, when the first packet includes 8 user equipments (Ν=8), and there are 3 scheduled user equipments (P=3) in the first packet in the current subframe, the PDCCH signal The order may include 8 scheduling identifiers, wherein the first three scheduling identifiers are set to "1", indicating that UE1, UE2, and UE3 are scheduled in the current subframe. Thereby, UE1, UE2 and UE3 can determine whether to be scheduled according to the scheduling identifier, and can determine the location in the scheduled user equipment, so that corresponding control information can be acquired.

In the embodiment of the present invention, one PDCCH signaling has a pre-configured payload size, the payload size is reserved according to the M-part control information, and each control information corresponds to one user equipment. Optionally, the M value is a pre-configured value, or the M value is configured by a higher layer signaling, or the M value dynamically changes according to the number of scheduled user equipments.

For example, as shown in FIG. 2, the M value can take a pre-configured value and is set to M=4. The pre-configured value can be determined by reference to the number of user equipments in a packet and the number of user equipments that typically need to be scheduled in the same subframe. In the embodiment of the present invention, the M value may be a value configured by a higher layer signaling, for example, the value of the M is configured by using RRC signaling, and the value may also refer to the number of user equipments in a group, and the same sub The number of user equipments that are normally scheduled in the frame is determined. At this time, the number P of scheduled user equipments may not exceed the M value, and if P is less than the M value, the remaining part of the payload is spared.

In the embodiment of the present invention, the M value may dynamically change with the number of scheduled user equipments. In this case, since the M value can be dynamically changed, the number of user equipments that can support scheduling can be 1 to specifically, according to the preset payload size of the PDCCH signaling, as the number of scheduled user equipment changes, The pre-configured payload size of the PDCCH signaling is parsed differently. For example, the size of the resource allocation may be adjusted to implement the analysis of the payload of the PDCCH signaling when different numbers of user equipments are scheduled. For example, when the number of scheduled user equipments is small, the payload of the PDCCH signaling can be parsed with a smaller resource allocation granularity; instead, a larger resource allocation granularity is used.

As shown in FIG. 3A and FIG. 3B, FIG. 3A shows that four user equipments are scheduled in the same subframe, and the load of the PDCCH signaling is divided into four parts, that is, M=P=4; and FIG. 3B shows Two user equipments are scheduled in the same subframe, and the payload of the same size of the PDCCH signaling is divided into two parts, that is, M=P=2. Thus, by dynamically determining the load carrying the control information of each user equipment, resource utilization efficiency can be improved, and scheduling flexibility can be improved.

In this embodiment of the present invention, optionally, the control information included in the PDCCH signaling is used for scheduling transmission of a data channel, or for scheduling transmission of a next-level control channel. The data channel, for example, a physical downlink shared channel (Phys ica l Downl ink Shared Channe l, cartridge called "PDSCH"), or a physical uplink shared channel (Phys ica l Upl ink Shared Channel , tube called "PUSCH") ₀ of the The next-level control channel is, for example, a next-level PDCCH, and the next-level PDCCH may be transmitted based on a precoding manner, and the user equipment demodulates based on a UE-specific reference signal (UE-spec if ic Reference S igna l ) The next level of PDCCH. It should be understood that the next-level PDCCH is a PDCCH for carrying the scheduling information of the data channel, and the control information in the PDCCH signaling of the group scheduling may be used to indicate the resource allocation and the like of the next-level PDCCH in the embodiment of the present invention. Optionally, the PDCCH signaling further includes a first resource allocation field that is exclusive to the user equipment, or a second resource allocation field that is shared by the user equipment, where the first resource allocation field or the second resource allocation field bearer is used to indicate the allocation. Information for the resources of the at least one scheduled user equipment.

Specifically, the resource allocation information in the PDCCH signaling may be independent of multiple user equipments or shared by multiple user equipments. If the resource allocation information in the PDCCH signaling is carried in multiple resource allocation fields of multiple UEs, that is, different UEs have independent resource allocation fields in the PDCCH signaling, in order to reduce the payload size of the PDCCH signaling, Adopt a centralized resource allocation method.

For example, mode 1: configuring a resource allocation set for the UE by using RRC signaling, and having multiple resource allocation modes in the set, and dynamically notifying the current UE by using the first resource allocation field in the PDCCH signaling. Which of the multiple resource allocation methods in the collection. For example, if there are two specific resource allocation modes in the set of RRC signaling configuration, such as {RB1+RB2} and {RB3+RB4}, only one bit is needed in the PDCCH signaling to dynamically notify the UE to adopt the two types. Which of the ways.

For example, mode 2: a contiguous resource block (Resource Block, referred to as "RB") size configured by using predefined or RRC signaling, and using a resource allocation field in PDCCH signaling to indicate a location of a specific resource allocation of the UE. For example, if only two consecutive RB-sized resources are allocated to UE1, and there are a total of 50 RBs in the system, only PDCCH2 (50/2) = 5 bits are needed in the PDCCH to notify which two consecutive RBs are specific.

If the resource allocation information in the PDCCH signaling is carried in a resource allocation field common to a plurality of UEs, each UE may parse the respective resource allocation information by using a predefined allocation manner, such as sharing. Or each UE adopts a multi-user (Mul t iple User) on the same resource that is notified. The cartridge is called "MU". The multi-input multi-output MIMO method is used to parse, that is, multiple UEs share the same time-frequency resource and are transmitted on different layers of the MIM0 channel. In particular, for the PDCCH signaling scheduled by the next-level PDCCH, multiple UEs may blindly detect the next-level PDCCH on the same resource that is notified. That is, in the case that the resource allocation information in the PDCCH signaling is shared by multiple UEs, multiple UEs jointly read the resource allocation field, acquire a resource set of the data channel, and then, according to a predefined rule, on the data channel. Determine your own data channel resources in the resource set.

In the embodiment of the present invention, optionally, the PDCCH signaling further includes resource indication information, where the resource indication information is used to indicate that the at least one scheduled user equipment uplinks the acknowledgment ACK/deny NACK information, or is used to indicate The physical hybrid automatically retransmits the resources of the channel (Physica I HARQ Indicator Channel, called "PHICH").

In particular, the mapping method can be implicit or displayed. The above ACK/NACK is taken as an example. If an implicit mapping is used, the control channel element (Control Channel Element, referred to as "CCE") of the PDCCH may be used, for example, the first CCE label corresponding to the PDCCH is used. The ACK/NACK is used as a starting point, and multiple ACK/NACKs are sequentially allocated to the scheduled multiple UEs in the order of ACK/NACK channel labels from small to large; if display mapping is used, it can be used separately for each scheduled UE. Two bits are displayed to inform them of the corresponding ACK/NACK resource.

In the embodiment of the present invention, the group identifier of the packet may be a time-frequency resource, such as a subframe number, a frame number, a slot number, a resource block label, a carrier label, a location in a search space space, or the like, or may be a code or a resource. , 1 "Radio Network Temporary Identation (Radio Network Temporary Identive)", or space resources, such as antenna ports, etc., or the aggregation level of the PDCCH, etc., the group identifier of the group can also be It is a combination of one or more of the foregoing time-frequency resources, code domain resources, spatial resources, and PDCCH aggregation levels. For example, different packets are identified by different RNTIs, that is, UEs of different packets correspond to respective UE groups. The RNTI is used to detect the PDCCH signaling corresponding to the respective packet; or, the different packets are identified by different detection subframes, for example, the UE in the first packet detects the corresponding PDCCH signaling in the odd-numbered subframe, and the second packet is in the second packet. The UE detects the corresponding PDCCH signaling in the even-numbered subframe. In the embodiment of the present invention, the RRC message further includes a group identifier of the at least one second packet to which the first user equipment belongs in the first packet, and the first user equipment is in the at least one second packet. s position. That is, one user equipment belongs to at least two groups at the same time, thereby greatly improving the flexibility of the grouping, thereby improving the flexibility of group scheduling.

For example, as shown in FIG. 4, UE1 belongs to the group and group identifier of the group identifier RNTI Q as RNTI.

The group of 4, this overlapping grouping method can improve the scheduling flexibility of group scheduling. Further, different group identifiers may also correspond to different antenna port information. For example, the UE may detect the PDSCH or the next-level PDCCH scheduled by the PDCCH signaling on the antenna port 7 according to the PDCCH signaling detected by the group identifier for the RNTI 0; the UE may detect that the RNTI 4 is detected by the group identifier. PDCCH signaling, detecting the PDSCH or the next-level PDCCH scheduled by the PDCCH signaling on the antenna port 8.

It should be understood that, in the embodiment of the present invention, the UE may detect the PDCCH signaling in a common search space or a search space corresponding to the group identifier. If you use a common search space, you can increase the size of the existing public search space, such as from 16 CCEs to 32 CCEs. On the other hand, it is possible to limit the aggregation level used to detect the PDCCH signaling, such as using only two aggregation levels of 2, 4, and 8 to detect the PDCCH signaling. If the UE is configured with a group identifier of multiple RNTIs, the Cyc lica Red Redemption Check (CRC) of the PDCCH signaling may be lengthened, for example, from the existing 16 bits. Up to 18 or 10 digits to reduce the probability of CRC false alarms.

1 to 4, a method for transmitting control information according to an embodiment of the present invention is described in detail from the perspective of a base station, and a transmission according to an embodiment of the present invention will be described from the perspective of a user equipment in conjunction with FIG. 5 to FIG. The method of controlling information.

FIG. 5 shows a schematic flow chart of a method of transmitting control information according to another embodiment of the present invention. As shown in FIG. 5, the method for transmitting control information includes: S310, the user equipment receives a radio resource control RRC message sent by the base station, where the RRC message includes first group information of the first packet to which the user equipment belongs;

S 320. The user equipment receives PDCCH signaling sent by the base station by using a physical downlink control channel PDCCH, where the PDCCH signaling includes control information of at least one scheduled user equipment in the first packet, where the PDCCH signaling has a pre-configured payload. a size, the load size is reserved according to the M share control information, each control information in the M pieces of control information corresponds to one user equipment, and the number of the at least one scheduled user equipment is less than or equal to M, in the first group The number of user equipment is greater than or equal to M, where M is a natural number;

S 330. The user equipment acquires, according to the first group information and the payload size, control information related to the user equipment included in the PDCCH signaling.

In S310, the first group information includes a group identifier of the first packet and a location of the user equipment within the first packet. It should be understood that the location of the user equipment within the packet may include the number or relative location of the user equipment within the packet. It should also be understood that the RRC message used to notify the packet information may be an existing RRC message, such as an RRC Connection Reconfiguration (RRC RRC Reconfiguration) message, or may be a newly added RRC message.

In S320, the PDCCH signaling received by the user equipment includes control information of at least one scheduled user equipment in the first packet, and the PDCCH signaling has a pre-configured payload size.

In S330, the user equipment may obtain, according to the first group information and the payload size, control information related to the user equipment included in the PDCCH signaling, so that the scheduled user equipment can correspond to the control information according to the control information. Data is transmitted and received on the physical channel.

The method for transmitting control information in the embodiment of the present invention carries the control information of at least one UE by using one PDCCH signaling, so that the control information can be transmitted in a combined scheduling manner, thereby expanding the capacity of the control channel, saving the overhead of the control channel, and improving System scheduling efficiency and flexibility.

In the embodiment of the present invention, optionally, the PDCCH signaling further includes a scheduling identifier, where the scheduling identifier is used to indicate whether each user equipment in the first packet is scheduled. Thus, optionally, such as As shown in FIG. 6, the user equipment acquiring the control information related to the user equipment included in the PDCCH signaling includes:

The user equipment determines, according to the first group information and the scheduling identifier included in the PDCCH signaling, that the user equipment is scheduled, and determines a location of the user equipment in the scheduled user equipment.

The user equipment acquires control information related to the user equipment included in the PDCCH signaling according to the location of the user equipment in the scheduled user equipment and the payload size.

Specifically, the scheduling identifier may be identified by a Bitmap of N bits, and a bit set to "1" or "0" may indicate whether the user equipment of the corresponding sequence number is scheduled. Therefore, the UE reads the scheduling identifier of the N bits in the PDCCH signaling, and determines the scheduling identifier of the UE according to the location of the UE in the first packet, and further determines whether the UE is scheduled in the current subframe; The user equipment can determine the scheduling location of the user equipment in the scheduled user equipment. Therefore, the user equipment can determine, according to the pre-configured payload size, the M value, and the scheduling location, control information related to the user equipment included in the PDCCH signaling.

In the embodiment of the present invention, optionally, the M value adopts a pre-configured value, or the M value adopts a value configured by a high layer signaling, or the M value dynamically changes according to the number of scheduled user equipments. Specifically, when the M value dynamically changes with the number of scheduled user equipments, the user equipment may perform different analysis on the PDCCH signaling according to the preset payload size of the PDCCH signaling and the number of scheduled user equipments. For example, the load of the PDCCH signaling when different numbers of user equipments are scheduled may be implemented by adjusting the granularity of the resource allocation. For example, when the number of scheduled user equipments is small, the load of the PDCCH signaling can be analyzed with a smaller resource allocation granularity; instead, a larger resource allocation granularity is adopted.

In the embodiment of the present invention, the control information is used to schedule transmission of a data channel, or to schedule transmission of a next-level control channel. Therefore, as shown in FIG. 7, the method for transmitting control information according to the embodiment of the present invention may further include:

S410. The user equipment schedules transmission of the data channel according to control information related to the user equipment, or schedules transmission of the next-level control channel. It should be understood that the data channel is for example PDSCH, or PUSCH. The next-level control channel is, for example, a next-level PDCCH, and the next-level PDCCH may be transmitted based on a pre-coding manner, and the user equipment demodulates the next-level PDCCH based on the UE-specific reference signal. It should also be understood that the next-level PDCCH is a PDCCH for carrying scheduling information of the data channel, and the control information in the PDCCH signaling of the group scheduling may be used to indicate information such as resource allocation of the next-level PDCCH.

In the embodiment of the present invention, the PDCCH signaling further includes a first resource allocation field that is exclusive to the user equipment, or a second resource allocation field shared by the user equipment, the first resource allocation field or the second resource. The allocation field carries information indicating the resources allocated to the at least one scheduled user equipment. Therefore, as shown in FIG. 7, the method for transmitting control information according to an embodiment of the present invention may further include:

S420: The user equipment acquires information about resources allocated to the user equipment according to the first resource allocation field that is exclusive to the user equipment that is included in the PDCCH signaling, or the second resource allocation field that is shared by the user equipment.

In the embodiment of the present invention, optionally, the PDCCH signaling further includes resource indication information, where the resource indication information is used to indicate that the at least one scheduled user equipment uplinks the acknowledgment ACK/deny NACK information, or is used to indicate The physical hybrid automatically retransmits the resources indicating the channel PHICH. Therefore, as shown in FIG. 7, the method for transmitting control information according to the embodiment of the present invention may further include:

S430. The user equipment acquires resource indication information included in the PDCCH signaling, to obtain a resource for uplink feedback ACK/NACK information according to the resource indication information, or obtain a resource of the physical hybrid automatic retransmission indication channel PHICH.

In the embodiment of the present invention, optionally, the RRC message further includes group information of the at least one second packet to which the user equipment belongs. Therefore, as shown in FIG. 7, the method for transmitting control information according to the embodiment of the present invention may further include:

S440. The user equipment acquires, according to the second group information of the at least one second packet that the user equipment belongs to the RRC message, and the payload size, the control information related to the user equipment included in the PDCCH signaling. The first group information may include a group identifier of the first packet and a location of the user equipment within the first packet. That is, one user equipment can belong to at least two groups at the same time, thereby greatly improving the flexibility of the grouping, thereby improving the flexibility of group scheduling.

It should also be understood that, in the embodiment of the present invention, the interaction between the user equipment and the base station described by the user equipment side and related features, functions, and the like are corresponding to the descriptions on the base station side, and are not described herein again.

The method for transmitting control information according to an embodiment of the present invention is described in detail above with reference to FIG. 1 through FIG. 7. The base station and user equipment according to an embodiment of the present invention will be described in detail below with reference to FIG. 8 through FIG.

FIG. 8 shows a schematic block diagram of a base station 600 in accordance with an embodiment of the present invention. As shown in FIG. 8, the base station 600 includes:

a determining module 610, configured to determine a first group to which at least one user equipment belongs;

The sending module 620 is configured to send, to the user equipment in the first group that is determined by the determining module 610, a radio resource control RRC message, where the RRC message includes a group identifier of the first group, and the user equipment is in the first group s position;

The forming module 630 is configured to form, by using the control information of the at least one scheduled user equipment in the first packet in the current subframe, a physical downlink control channel PDCCH signaling, where the PDCCH signaling has a pre-configured payload size, and the payload size According to the M control information reservation, each control information in the M pieces of control information corresponds to one user equipment, and the number of the at least one scheduled user equipment is less than or equal to M, and the number of user equipments in the first group Greater than or equal to M, where M is a natural number;

The sending module 620 is further configured to send the PDCCH signaling formed by the forming module 630 to the at least one scheduled user equipment by using a PDCCH. The base station of the embodiment of the present invention can carry control information of at least one UE by using one PDCCH signaling, so that control information can be transmitted in a combined scheduling manner, thereby expanding the capacity of the control channel, saving control channel overhead, and improving system scheduling efficiency and flexibility.

Optionally, the PDCCH signaling formed by the forming module 630 further includes a scheduling identifier, where the scheduling identifier is used to indicate whether each user equipment in the first packet is scheduled.

Optionally, the M value adopts a pre-configured value, or the M value adopts a value configured by high layer signaling, or the M value dynamically changes with the number of scheduled user equipments.

Optionally, the PDCCH signaling formed by the forming module 630 includes the control information for scheduling transmission of a data channel, or for scheduling transmission of a next-level control channel.

Optionally, the PDCCH signaling formed by the forming module 630 further includes a first resource allocation field exclusive to the user equipment, or a second resource allocation field shared by the user equipment, the first resource allocation field or the second resource allocation. The field carries information indicating a resource allocated to the at least one scheduled user equipment.

Optionally, the PDCCH signaling formed by the forming module 630 further includes resource indication information, where the resource indication information is used to indicate that the at least one scheduled user equipment uplinks the acknowledgment ACK/deny NACK information, or is used to indicate the physics. Hybrid automatic retransmission of resources indicating the channel PHICH.

Optionally, the RRC message sent by the sending module 620 further includes a group identifier of the at least one second group to which the first user equipment belongs in the first group, and the first user equipment is in the at least one second group. position.

The base station 600 according to an embodiment of the present invention may correspond to a base station in a method of transmitting control information according to an embodiment of the present invention, and the above and other operations and/or functions of respective modules in the base station 600 are respectively implemented in order to implement FIGS. 1 to 7 The corresponding process of the method in the process, for the sake of cleaning, will not be repeated here.

The base station of the embodiment of the present invention can carry control information of at least one UE by using one PDCCH signaling, so that control information can be transmitted in a combined scheduling manner, thereby expanding the capacity of the control channel, saving control channel overhead, and improving system scheduling efficiency and flexibility. FIG. 9 shows a schematic block diagram of a user equipment 700 in accordance with an embodiment of the present invention. As shown in FIG. 9, the user equipment 700 includes:

The receiving module 710 is configured to receive a radio resource control RRC message sent by the base station, where the RRC message includes first group information of the first packet to which the user equipment belongs;

The receiving module 710 is further configured to receive PDCCH signaling that is sent by the base station by using a physical downlink control channel PDCCH, where the PDCCH signaling includes control information of at least one scheduled user equipment in the first packet, where the PDCCH signaling has a pre-configured a load size, the load size is reserved according to the M control information, each control information in the M pieces of control information corresponds to one user equipment, and the number of the at least one scheduled user equipment is less than or equal to M, the first The number of user equipments in the group is greater than or equal to M, where M is a natural number;

The obtaining module 720 is configured to acquire, according to the first packet information included in the RRC message received by the receiving module 710, and the payload size of the PDCCH signaling received by the receiving module 710, and acquire the PDCCH signaling included by the user Device related control information.

Optionally, the PDCCH signaling received by the receiving module 710 further includes a scheduling identifier, where the scheduling identifier is used to indicate whether each user equipment in the first packet is scheduled.

Optionally, the control information included in the PDCCH signaling received by the receiving module 710 is used to schedule transmission of a data channel, or used to schedule transmission of a next-level control channel.

Optionally, the PDCCH signaling received by the receiving module 710 further includes a first resource allocation field exclusive to the user equipment, or a second resource allocation field shared by the user equipment, the first resource allocation field or the second resource allocation. The field carries information indicating a resource allocated to the at least one scheduled user equipment.

Optionally, the PDCCH signaling received by the receiving module 710 further includes resource indication information, where the resource indication information is used to indicate that the at least one scheduled user equipment uplinks the ACK/ACK NACK information, or is used to indicate the physics. Hybrid automatic retransmission of resources indicating the channel PHICH. Optionally, the RRC message received by the receiving module 710 further includes group information of the at least one second packet to which the user equipment belongs.

In the embodiment of the present invention, optionally, as shown in FIG. 10, the obtaining module 720 includes: a determining unit 721, configured to determine, according to the first group information and a scheduling identifier included in the PDCCH signaling, that the user equipment is Scheduling, and determining the location of the user equipment in the scheduled user equipment;

The obtaining unit 722 is configured to obtain, according to the location of the user equipment in the scheduled user equipment and the size of the payload, control information related to the user equipment included in the PDCCH signaling.

In the embodiment of the present invention, optionally, as shown in FIG. 11, the user equipment 700 further includes: a scheduling module 730, configured to schedule a data channel according to control information related to the user equipment acquired by the acquiring module 720. Transmit, or schedule the transmission of the next level of control channel.

In the embodiment of the present invention, optionally, as shown in FIG. 9, the acquiring module 720 is further configured to: according to the PDCCH signaling, the first resource allocation field exclusive to the user equipment, or the second shared by the user equipment. A resource allocation field that obtains information about resources allocated to the user device.

In the embodiment of the present invention, optionally, as shown in FIG. 9, the acquiring module 720 is further configured to acquire resource indication information included in the PDCCH signaling, to obtain an uplink feedback acknowledgement ACK/deny NACK information according to the resource indication information. The resource, or the physical hybrid automatically retransmits the resource indicating the channel PHICH.

In the embodiment of the present invention, optionally, as shown in FIG. 9, the acquiring module 720 is further configured to: according to the second group information of the at least one second group to which the user equipment belongs, and the load size, according to the RRC message, Obtaining control information related to the user equipment included in the PDCCH signaling.

The user equipment 700 according to an embodiment of the present invention may correspond to a user equipment in a method of transmitting control information according to an embodiment of the present invention, and the above and other operations and/or functions of respective modules in the user equipment 700 are respectively implemented to implement FIG. The corresponding flow to the method in FIG. 7 is not described here. The user equipment of the embodiment of the present invention can transmit control information in a combined scheduling manner by using one PDCCH message and carrying control information of at least one UE, thereby expanding the capacity of the control channel, saving control channel overhead, and improving system scheduling efficiency. And flexibility.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware, computer software or a combination of both, in order to clearly illustrate hardware and software. Interchangeability, the composition and steps of the various examples have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

A person skilled in the art can clearly understand that, for the convenience and the cleaning of the description, the specific working processes of the system, the device and the unit described above can refer to the corresponding processes in the foregoing method embodiments, and details are not described herein again.

In the several embodiments provided herein, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed. In addition, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, or an electrical, mechanical or other form of connection. The components displayed as units may or may not be physical units, i.e., may be located in one place, or may be distributed over multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiments of the present invention.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or may be integrated by two or more units. In one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention contributes in essence or to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM, Random Acces s Memory), a magnetic disk or an optical disk, and the like, which can store program codes. medium.

The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any equivalent person can be easily conceived within the technical scope of the present invention. Modifications or substitutions are intended to be included within the scope of the invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Claims

Rights request

A method for transmitting control information, comprising:

Determining a first group to which at least one user equipment belongs;

Transmitting, to the user equipment in the first group, a radio resource control RRC message, where the RRC message includes a group identifier of the first packet and a location of the user equipment in the first packet;

And the control information of the at least one scheduled user equipment in the first packet in the current subframe is formed into a physical downlink control channel PDCCH signaling, where the PDCCH signaling has a pre-configured payload size, and the payload size is in accordance with the M serving The control information is reserved, each control information in the M pieces of control information corresponds to one user equipment, and the number of the at least one scheduled user equipment is less than or equal to M, and the number of user equipments in the first group Greater than or equal to M, where M is a natural number;

Transmitting the PDCCH signaling to the at least one scheduled user equipment by using a PDCCH.

The method according to claim 1, wherein the PDCCH signaling further includes a scheduling identifier, where the scheduling identifier is used to indicate whether each user equipment in the first packet is scheduled.

The method according to claim 1, wherein the M value adopts a pre-configured value, or the M value adopts a value configured by a high layer signaling, or the M value follows a scheduled user equipment. The quantity changes dynamically.

The method according to claim 1, wherein the control information is used for scheduling transmission of a data channel, or for scheduling transmission of a next-level control channel.

The method according to claim 1, wherein the PDCCH signaling further includes a first resource allocation field unique to the user equipment, or a second resource allocation field shared by the user equipment, the first resource allocation. The field or the second resource allocation field carries information indicating a resource allocated to the at least one scheduled user equipment.

The method according to claim 1, wherein the PDCCH signaling further includes resource indication information, where the resource indication information is used to indicate that the at least one scheduled user equipment uplink feedback acknowledges ACK/deny NACK information. Resources, or resources used to indicate physical hybrid automatic retransmission indication channel PHICH.

The method according to any one of claims 1 to 6, wherein the RRC message further includes a group identifier and a group identifier of at least one second packet to which the first user equipment belongs in the first packet Describe the location of the first user equipment within the at least one second packet.

8. A method of transmitting control information, comprising:

Receiving, by the user equipment, a radio resource control RRC message sent by the base station, where the RRC message includes first group information of the first packet to which the user equipment belongs;

The user equipment receives PDCCH signaling that is sent by the base station by using a physical downlink control channel PDCCH, where the PDCCH signaling includes control information of at least one scheduled user equipment in the first packet, where the PDCCH signaling has an advance a configured load size, the load size is reserved according to the M share control information, each control information in the M pieces of control information corresponds to one user equipment, and the number of the at least one scheduled user equipment is less than or equal to M The number of user equipments in the first group is greater than or equal to M, where M is a natural number;

And the user equipment acquires, according to the first group information and the payload size, control information related to the user equipment included in the PDCCH signaling.

The method according to claim 8, wherein the acquiring the control information related to the user equipment included in the PDCCH signaling comprises:

Determining, by the user equipment, that the user equipment is scheduled according to the first group information and a scheduling identifier that is included in the PDCCH signaling, and determining a location of the user equipment in the scheduled user equipment;

The user equipment acquires control information related to the user equipment included in the PDCCH signaling according to the location of the user equipment in the scheduled user equipment and the load size.

The method according to claim 8, wherein the M value adopts a pre-configured value, or the M value adopts a value configured by a high layer signaling, or the M value follows a scheduled user equipment. The quantity changes dynamically.

The method according to claim 8, wherein the method further comprises: the user equipment scheduling transmission of a data channel according to control information related to the user equipment, or scheduling a next-level control channel transmission.

The method according to claim 8, wherein the method further comprises: the user equipment sharing a first resource allocation field exclusive to the user equipment included in the PDCCH signaling, or sharing by a user equipment The second resource allocation field obtains information of resources allocated to the user equipment.

The method according to claim 8, wherein the method further includes: the user equipment acquiring the resource indication information included in the PDCCH signaling, to obtain an uplink feedback acknowledgement ACK according to the resource indication information. A resource that denies NACK information, or a resource that automatically retransmits the indication channel PH I CH.

The method according to any one of claims 8 to 13, wherein the method further comprises:

Obtaining, by the user equipment, control information related to the user equipment included in the PDCCH signaling according to the second group information of the at least one second packet to which the user equipment belongs and the payload size that are included in the RRC message .

A base station, comprising:

a determining module, configured to determine a first group to which at least one user equipment belongs;

a sending module, configured to send a radio resource control RRC message to the user equipment in the first group that is determined by the determining module, where the RRC message includes a group identifier of the first group, and the user equipment is in the The location within the first group;

a forming module, configured to form control information of at least one scheduled user equipment in the first packet in the current subframe into one physical downlink control channel PDCCH signaling, where the PDCCH signaling device There is a pre-configured load size, the load size is reserved according to the M share control information, each control information in the M pieces of control information corresponds to one user equipment, and the number of the at least one scheduled user equipment is less than or Equal to M, the number of user equipments in the first group is greater than or equal to M, where M is a natural number;

The sending module is further configured to send, by using a PDCCH, the PDCCH signaling formed by the forming module to the at least one scheduled user equipment.

The base station according to claim 15, wherein the PDCCH signaling formed by the forming module further includes a scheduling identifier, where the scheduling identifier is used to indicate whether each user equipment in the first packet is Is scheduled.

The base station according to claim 15, wherein the M value is a pre-configured value, or the M value is configured by a higher layer signaling, or the M value is associated with a scheduled user equipment. The quantity changes dynamically.

The base station according to claim 15, wherein the control information included in the PDCCH signaling formed by the forming module is used for scheduling transmission of a data channel, or for scheduling a next-level control channel. transmission.

The base station according to claim 15, wherein the PDCCH signaling formed by the forming module further includes a first resource allocation field unique to the user equipment, or a second resource allocation field shared by the user equipment. The first resource allocation field or the second resource allocation field carries information indicating a resource allocated to the at least one scheduled user equipment.

The base station according to claim 15, wherein the PDCCH signaling formed by the forming module further includes resource indication information, where the resource indication information is used to indicate uplink feedback of the at least one scheduled user equipment. A resource that acknowledges ACK/Negative NACK information, or a resource that is used to indicate a physical hybrid automatic retransmission indication channel PHICH.

The base station according to any one of claims 15 to 20, wherein the RRC message sent by the sending module further includes a first user equipment in the first packet. a group identification of the at least one second packet and a location of the first user equipment within the at least one second packet.

22. A user equipment, comprising:

a receiving module, configured to receive a radio resource control RRC message sent by the base station, where the RRC message includes first group information of the first packet to which the user equipment belongs;

The receiving module is further configured to receive PDCCH signaling that is sent by the base station by using a physical downlink control channel PDCCH, where the PDCCH signaling includes control information of at least one scheduled user equipment in the first packet, where the PDCCH is Having a pre-configured payload size, the payload size is reserved according to the M-part control information, each control information in the M-part control information corresponds to one user equipment, and the number of the at least one scheduled user equipment is less than Or equal to M, the number of user equipments in the first group is greater than or equal to M, where M is a natural number;

An acquiring module, configured to acquire, according to the first packet information that is included in the RRC message that is received by the receiving module, and the load size that is received by the PDCCH signaling received by the receiving module, Control information related to the user equipment.

The user equipment according to claim 22, wherein the obtaining module comprises:

a determining unit, configured to determine, according to the first group information and a scheduling identifier included in the PDCCH signaling, that the user equipment is scheduled, and determine a location of the user equipment in the scheduled user equipment;

And an obtaining unit, configured to acquire, according to the location of the user equipment in the scheduled user equipment, and the load size, control information related to the user equipment included in the PDCCH signaling.

The user equipment according to claim 22, wherein the M value is a pre-configured value, or the M value is configured by a higher layer signaling, or the M value is associated with a scheduled user equipment. The number of changes dynamically.

The user equipment according to claim 22, wherein the user equipment further includes: And a scheduling module, configured to schedule transmission of a data channel according to control information related to the user equipment acquired by the acquiring module, or schedule transmission of a next-level control channel.

The user equipment according to claim 22, wherein the acquiring module is further configured to: according to the first resource allocation field exclusive to the user equipment included in the PDCCH signaling, or the user equipment sharing a resource allocation field, which obtains a resource assigned to the resource of the user equipment

The user equipment according to claim 22, wherein the acquiring module is further configured to acquire resource indication information included in the PDCCH signaling, to obtain an uplink feedback acknowledgement ACK/deny NACK according to the resource indication information. The resource of the information, or the physical hybrid automatically retransmits the resource indicating the channel PHICH.

The user equipment according to any one of claims 22 to 27, wherein the acquiring module is further configured to: according to the second part of the at least one second group to which the user equipment belongs according to the RRC message The packet information and the payload size are used to obtain control information related to the user equipment included in the PDCCH signaling.