WO2016145636A1

WO2016145636A1 - Network device, terminal and transmission method for downlink control information

Info

Publication number: WO2016145636A1
Application number: PCT/CN2015/074507
Authority: WO
Inventors: 余西西; 杨晖
Original assignee: 华为技术有限公司
Priority date: 2015-03-18
Filing date: 2015-03-18
Publication date: 2016-09-22

Abstract

The present invention relates to the technical field of wireless communications, in particular to a network device, a terminal and a transmission method for downlink control information, which are used for solving the problem that when an uplink transmission and a downlink transmission of a terminal are scheduled via a piece of downlink control information, both downlink resource allocation information and uplink resource allocation information carry a terminal identifier of the terminal, causing the waste of air interface resources. In the network device provided in the embodiments of the present invention, a processing module determines uplink and downlink resource allocation information, the information comprising: information about downlink resources allocated to a terminal, information about uplink resources allocated to the terminal and a terminal identifier of the terminal; and a sending module sends the determined uplink and downlink resource allocation information. Since information about uplink resources and information about downlink resources share the same terminal identifier, the overhead of the terminal identifier is saved and the waste of an air interface is avoided.

Description

Network device, terminal and transmission method of downlink control information

Technical field

The present invention relates to the field of wireless communications technologies, and in particular, to a network device, a terminal, and a method for transmitting downlink control information.

Background technique

The Internet of Things, also known as Machine-To-Machine (M2M) communication, is a new communication method in recent years. Different from traditional human-to-human communication, M2M communication has the characteristics of huge number of terminals, high power saving requirements, and complex wireless communication environment. The M2M communication can be implemented based on a global mobile communication system such as a Global System for Mobile Communication (GSM), a Universal Mobile Telecommunications System (UMTS), or a Long Term Evolution (LTE).

Currently, a number of standardization organizations, including the 3rd Generation Partnership Project (3GPP), conduct research on M2M communication. For example, 3GPP set up a research project based on cellular network to support IoT applications at the 62nd meeting of GSM Enhanced Data Rate for GSM Evolution Radio Access Network (GERAN) (Study) Item, SI), called "Cellular System Support for Ultra Low Complexity and Low Throughput Internet of Things", represented by LTE M2M system, based on LTE system architecture Designed to implement M2M applications.

In the LTE M2M system, the LTE design is adopted. The terminal obtains uplink and/or downlink scheduling information by listening to Downlink Control Information (DCI). However, unlike the traditional LTE system, in the LTE M2M, in order to adapt to the M2M application, the terminal is more flexibly scheduled, and the DCI is divided into two parts, namely, a fixed length (136 bits) DCI0 and a variable length DCI1. The DCI0 includes the length information of the entire DCI payload, and the terminal can obtain the payload length of the entire DCI after parsing the DCI0, and then subtract the fixed length of the DCI0 to obtain the DCI1. The actual length, in turn, resolves DCI1.

In the LTE M2M system, the DCI usually includes uplink scheduling information, downlink scheduling information, and the like of multiple users. The specific frame structure is as shown in FIG. 1 , where the downlink number (DL number) indicates the number of downlink scheduling information included in the DCI, and the downlink allocation (DL Allocation) indicates downlink scheduling information of a single user, and includes scheduling in the DL Allocation. The terminal identifier of the terminal (Cell-Radio Network Temporary Identifier (C-RNTI), the terminal can determine whether it is scheduled to downlink according to the C-RNTI in the DL Allocation. The number of uplinks (UL number) indicates that the DCI is included. The number of uplink scheduling information, the uplink allocation (UL Allocation) also includes the terminal identifier C-RNTI of the scheduled terminal, and the terminal can determine whether it is scheduled to uplink according to the C-RNTI in the UL Allocation.

When downlink transmission is performed in the LTE M2M system, a retransmission mechanism based on ACK/NACK (ACK/NACK) is adopted, and the flow is as shown in FIG. 2 .

First, the network equipment base station allocates a downlink resource for transmitting a downlink service packet to a terminal that needs to transmit downlink, and indicates to the terminal by using DL Allocation in the DCI; the terminal receives the downlink service packet sent by the base station on the downlink resource allocated by the base station; and then, the base station The uplink resource required for the terminal to allocate the downlink service transmission feedback ACK is indicated to the terminal by the UL Allocation in the DCI; the terminal feeds back the ACK received by the downlink service packet on the uplink resource allocated by the base station.

It can be seen from FIG. 2 that, in the downlink transmission, the downlink transmission resource needs to be allocated to the terminal through the DL Allocation in the DCI, and the uplink resource for transmitting the ACK/NACK needs to be allocated through the UL Allocation in the DCI. Based on the DCI structure of the LTE M2M, the terminal can obtain DL Allocation and UL Allocation through two DCIs respectively, or obtain DL Allocation and UL Allocation through one DCI.

If DL Allocation and UL Allocation are transmitted through two DCIs respectively, the air interface transmission time is prolonged; if transmitted in one DCI, the existing design DL Allocation and UL Allocation carry 20-bit C-RNTI for the same terminal C. - RNTI is duplicated, wasting air interface resources.

It can be seen that, in a wireless communication system such as an LTE M2M system, when the uplink transmission and the downlink transmission of one terminal are scheduled by using one downlink control information, the downlink resource allocation information and the uplink resource allocation information both carry the terminal identifier of the terminal. It caused a waste of air interface resources.

Summary of the invention

The embodiment of the present invention provides a network device, a terminal, and a downlink control information transmission method, where the downlink resource allocation information and the uplink resource allocation information are carried when the uplink transmission and the downlink transmission of one terminal are scheduled by using one downlink control information. The problem of wasted air interface resources caused by the terminal identification of the terminal.

In a first aspect, an embodiment of the present invention provides a network device, including:

a processing module, configured to determine uplink and downlink resource allocation information, where the uplink and downlink resource allocation information includes: information about a downlink resource allocated to the terminal for the uplink and downlink resource allocation information, and information allocated to the uplink and downlink resource allocation information Information about the uplink resource of the terminal, and the terminal identifier of the terminal for which the uplink and downlink resource allocation information is targeted;

And a sending module, configured to send the determined uplink and downlink resource allocation information.

In combination with the first aspect, in a first possible implementation manner,

The network device uses a long-term evolution machine-to-machine LTE M2M mode communication;

The uplink and downlink resource allocation information is sent by the sending module in the downlink control information DCI;

The DCI includes a fixed length portion DCI0 and a variable length portion DCI1, wherein the DCI0 of the DCI includes at least one of the uplink and downlink resource allocation information.

In conjunction with the first possible implementation of the first aspect, in a second possible implementation,

The DCI of the DCI also includes:

Checking information for verifying the correctness of the DCI of the DCI; and/or

The number of the uplink and downlink resource allocation information included in the DCI.

In combination with the first possible implementation manner of the first aspect or the second possible implementation manner, in a third possible implementation manner,

The DCI of the DCI also includes:

The type indication information is used to indicate that the DCI includes at least one of the uplink and downlink resource allocation information.

In conjunction with the third possible implementation of the first aspect, in a fourth possible implementation,

The processing module is further configured to: before the sending module sends the determined uplink and downlink resource allocation information to the terminal that is used by the uplink and downlink resource allocation information,

When it is determined that the downlink resource allocation information is not included in the DCI, and the uplink resource allocation information is not included, determining that the type indication information is specifically used to indicate that the uplink resource allocation information is not included in the DCI, and the Describe the downlink resource allocation information;

The downlink resource allocation information includes information of a downlink resource allocated to a terminal that communicates with the network device, where the uplink resource allocation information includes information of an uplink resource allocated to a terminal that communicates with the network device.

In conjunction with the third possible implementation of the first aspect, in a fifth possible implementation,

Determining, when the determining that the DCI further includes the downlink resource allocation information and/or the uplink resource allocation information, the type indication information is used to indicate that the DCI further includes the downlink resource allocation information and/or the downlink resource. Assign information;

The downlink resource information includes information of a downlink resource allocated to a terminal that communicates with the network device, where the uplink resource allocation information includes information of an uplink resource allocated to a terminal that communicates with the network device.

In combination with the third possible implementation of the first aspect to any one of the fifth possible implementation manners, in a sixth possible implementation manner,

The sending module is further configured to: send another DCI other than the DCI,

The processing module is further configured to: when it is determined that the other uplink and downlink resource allocation information is not included in the other DCI, determine that the type indication information is specifically used to indicate that the uplink and downlink resource allocation is not included in the other DCI. information.

With reference to any one of the first possible implementation to the sixth possible implementation of the first aspect, in a seventh possible implementation,

The DCI further includes: a terminal that is allocated to the uplink and downlink resource allocation information Information about uplink resources and/or downlink resources of other terminals.

With reference to the first aspect, or any one of the first possible implementation to the seventh possible implementation of the first aspect, in an eighth possible implementation,

The information of the downlink resource allocated to the terminal for which the uplink and downlink resource allocation information is targeted includes at least one of the following information:

a channel identifier of a downlink channel allocated to the terminal;

The duration of the downlink resources allocated to the terminal;

a modulation and coding scheme of downlink resources allocated to the terminal; and/or

The information of the uplink resource allocated to the terminal includes at least one of the following information:

a channel identifier of an uplink channel allocated to the terminal;

The duration of the uplink resource allocated to the terminal;

The modulation and coding scheme of the uplink resource allocated to the terminal.

In a second aspect, an embodiment of the present invention provides a terminal, including:

a receiving module, configured to receive uplink and downlink resource allocation information sent by the network device;

a processing module, configured to: when the terminal identifier of the terminal is the same as the terminal identifier included in the uplink and downlink resource allocation information, determine that the uplink and downlink resource allocation information is sent to the terminal; Obtain the following information in the description of the downlink resource allocation information:

Information of downlink resources allocated to the terminal;

Information of uplink resources allocated to the terminal.

With reference to the second aspect, in a first possible implementation, the terminal communicates with the network device by using a long-term evolution machine-to-machine LTE M2M manner;

The uplink and downlink resource allocation information is sent by the network device in the downlink control information DCI;

With reference to the first possible implementation of the second aspect, in a second possible implementation, the DCI of the DCI further includes:

In conjunction with the first possible implementation or the second possible implementation of the second aspect, in a third possible implementation, the DCI of the DCI further includes:

With reference to the third possible implementation of the second aspect, in a fourth possible implementation, the type indication information is specifically used to indicate:

The downlink resource allocation information is not included in the DCI, and the downlink resource allocation information is not included; or

The DCI further includes downlink resource allocation information and/or uplink resource allocation information;

In conjunction with the third possible implementation of the second aspect, or the fourth possible implementation, in a fifth possible implementation, the receiving module is further configured to:

And receiving the other DCI sent by the network device, and the type indication information in the received DCI0 of the other DCI is used to indicate that the uplink and downlink resource allocation information is not included in the other DCI.

With reference to the first possible implementation of the second aspect, the fifth possible implementation manner, in the sixth possible implementation, the DCI further includes:

Information of uplink resources and/or downlink resources allocated to other terminals than the terminal.

With reference to the second aspect, or any one of the first possible implementation to the sixth possible implementation of the second aspect, in a seventh possible implementation,

The information about the downlink resource allocated to the terminal includes at least one of the following information:

a channel identifier of a downlink channel allocated to the terminal;

The duration of the downlink resource allocated to the terminal;

The information about the uplink resource allocated to the terminal includes at least one of the following information:

a channel identifier of an uplink channel allocated to the terminal;

The duration of the uplink resource allocated to the terminal;

In a third aspect, an embodiment of the present invention provides a method for sending downlink control information, including:

The network device determines uplink and downlink resource allocation information, where the uplink and downlink resource allocation information includes: information about a downlink resource allocated to the terminal for which the uplink and downlink resource allocation information is targeted, and information allocated to the uplink and downlink resource allocation information Information about an uplink resource of the terminal, and a terminal identifier of the terminal for which the uplink and downlink resource allocation information is targeted;

The network device sends the determined uplink and downlink resource allocation information.

In combination with the third aspect, in a first possible implementation manner,

In conjunction with the first possible implementation of the third aspect, in a second possible implementation manner,

The DCI of the DCI also includes:

In combination with the first possible implementation manner of the third aspect or the second possible implementation manner, in a third possible implementation manner,

The DCI of the DCI also includes:

In conjunction with the third possible implementation of the third aspect, in a fourth possible implementation,

Before the network device sends the determined uplink and downlink resource allocation information to the terminal that is used by the uplink and downlink resource allocation information, the method further includes:

In conjunction with the third possible implementation of the third aspect, in a fifth possible implementation manner,

With reference to any one of the third possible implementation to the fifth possible implementation of the third aspect, in a sixth possible implementation manner,

The method also includes transmitting a DCI other than the DCI,

When it is determined that the uplink and downlink resource allocation information is not included in the other DCI, determining that the type indication information is specifically used to indicate that the uplink and downlink resource allocation information is not included in the other DCI.

With reference to any one of the first possible implementation to the sixth possible implementation of the third aspect, in a seventh possible implementation,

The DCI further includes: information about uplink resources and/or downlink resources allocated to other terminals than the terminal for which the uplink and downlink resource allocation information is targeted.

With reference to the third aspect, or any one of the first possible implementation manner of the third aspect to the seventh possible implementation manner, in an eighth possible implementation manner,

a channel identifier of a downlink channel allocated to the terminal;

The duration of the downlink resources allocated to the terminal;

a channel identifier of an uplink channel allocated to the terminal;

The duration of the uplink resource allocated to the terminal;

In a fourth aspect, an embodiment of the present invention provides a method for receiving downlink control information, including:

Receiving, by the terminal, uplink and downlink resource allocation information sent by the network device;

When the terminal identifier of the terminal is the same as the terminal identifier included in the uplink and downlink resource allocation information, the terminal determines that the uplink and downlink resource allocation information is sent to itself;

The terminal obtains the following information from the received uplink and downlink resource allocation information:

Information assigned to its own downstream resources;

Information assigned to its own upstream resources.

In combination with the fourth aspect, in a first possible implementation manner,

The terminal communicates with the network device by using a long-term evolution machine-to-machine LTE M2M mode;

In conjunction with the first possible implementation of the fourth aspect, in a second possible implementation manner, the DCI of the DCI further includes:

With reference to the first possible implementation manner or the second possible implementation manner of the fourth aspect, in a third possible implementation, the DCI of the DCI further includes:

With reference to the third possible implementation manner of the fourth aspect, in a fourth possible implementation manner, the type indication information is specifically used to indicate:

With reference to the third possible implementation manner of the fourth aspect, or the fourth possible implementation manner, in a fifth possible implementation manner, the method further includes:

The terminal receives the other DCI sent by the network device, and the type indication information in the received DCI0 of the other DCI is used to indicate that the uplink and downlink resource allocation information is not included in the other DCI.

With reference to any one of the first possible implementation to the fifth possible implementation of the fourth aspect, in the sixth possible implementation, the DCI further includes:

With reference to the fourth aspect, or any one of the first possible implementation to the sixth possible implementation of the fourth aspect, in a seventh possible implementation manner,

The information allocated to the downlink resource of the self includes at least one of the following information:

a channel identifier of a downlink channel allocated to the terminal;

The duration of the downlink resource allocated to the terminal;

The information allocated to the uplink resource of itself includes at least one of the following information:

a channel identifier of an uplink channel allocated to the terminal;

The duration of the uplink resource allocated to the terminal;

In the embodiment of the present invention, an uplink and downlink resource allocation information is added, where the uplink and downlink resource allocation information includes: information about a downlink resource allocated to a terminal, information of an uplink resource allocated to the terminal, and a terminal identifier of the terminal. In this way, the information of the uplink resource and the information of the downlink resource share the same terminal identifier, which saves the overhead of the terminal identifier and avoids waste of air interface. When the number of terminals to be scheduled is large, the duration of monitoring the DCI by the terminal can also be shortened, and power consumption can be reduced.

Moreover, the terminal may obtain the information of the downlink resource allocated to itself and the information of the uplink resource in an uplink and downlink resource allocation information, instead of obtaining the downlink resource information from the DL Allocation, as in the prior art, from the UL Allocation. The information of the uplink resources is obtained, which reduces the complexity and processing load of the terminal processing.

In particular, when the embodiment of the present invention is applied to the LTE M2M system, the LTE M2M mode communication between the terminal and the network device, the information of the downlink resource allocated to the terminal for transmitting the downlink service packet, and the information allocated to the terminal are used for the terminal. The information about the uplink resource that is fed back to the downlink service packet can be sent to the terminal in the same uplink and downlink resource allocation information, so that the terminal can receive the two resource information through the two DCIs respectively. After the completion of the receiving, the information about the allocated uplink resources has not been received, and the receiving of the downlink service packets cannot be fed back, and the delay and the downlink service packet transmission efficiency are reduced.

Further, if the embodiment of the present invention is applied to the LTE M2M system, the uplink and downlink resource allocation information may be sent in the DCI, where the DCI includes DCI0 and DCI1, where the DCI of the DCI includes at least one uplink and downlink resource. Assign information. At this time, if the terminal receives the message addressed to itself in DCI0, there is no need to interpret DCI1, which also reduces the complexity and processing load of the terminal processing.

Further, the DCI0 may further include type indication information for indicating whether the uplink and downlink resource allocation information is included in the DCI, and the terminal may determine, according to the type indication information, whether the uplink and downlink resource allocation information is included in the DCI, so as to facilitate the terminal to decode the DCI.

DRAWINGS

1 is a frame structure diagram of a conventional DCI;

2 is a flow chart of downlink transmission in an existing LTE M2M system;

FIG. 3 is a schematic structural diagram of a wireless communication system according to an embodiment of the present disclosure;

4 is a flowchart of downlink transmission in a wireless communication system according to an embodiment of the present invention;

FIG. 5A is a schematic diagram of periodic transmission of DCI in a normal coverage scenario; FIG.

FIG. 5B is a schematic diagram of periodic transmission of DCI in an enhanced coverage scenario; FIG.

FIG. 6 is a schematic structural diagram of a first DCI frame according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of a second DCI frame according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of a third DCI frame according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of a first network device according to an embodiment of the present disclosure;

FIG. 10 is a schematic structural diagram of a second network device according to an embodiment of the present disclosure;

FIG. 11 is a schematic structural diagram of a first terminal according to an embodiment of the present disclosure;

FIG. 12 is a schematic structural diagram of a second terminal according to an embodiment of the present disclosure;

FIG. 13 is a flowchart of a method for sending downlink control information according to an embodiment of the present invention;

FIG. 14 is a flowchart of a method for receiving downlink control information according to an embodiment of the present invention.

detailed description

The embodiment of the present invention provides a network device, a terminal, and a downlink control information transmission method, where the uplink resource allocation information and the uplink resource allocation information are carried when the uplink transmission and the downlink transmission of one terminal are scheduled by using one downlink control information. The problem of wasted air interface resources caused by the terminal identification of the terminal.

In the embodiment of the present invention, an uplink and downlink resource allocation information is added, where the uplink and downlink resource allocation information includes: information about a downlink resource allocated to a terminal, information of an uplink resource allocated to the terminal, and a terminal identifier of the terminal. In this way, the information of the uplink resource and the information of the downlink resource share the same terminal identifier, which saves the overhead of the terminal identifier and avoids waste of air interface.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The following describes the wireless communication system provided by the embodiment of the present invention, and then introduces the network device and the terminal provided by the embodiment of the present invention, and finally introduces the transmission of the downlink control information provided by the embodiment of the present invention. Input method.

FIG. 3 is a schematic structural diagram of a wireless communication system 30 according to an embodiment of the present invention. As shown in FIG. 3, the wireless communication system 30 includes:

The network device 301 is configured to determine and send uplink and downlink resource allocation information (DL_UL Allocation), where the DL_UL Allocation uplink and downlink resource allocation information includes: information about a downlink resource allocated to the terminal for the DL_UL Allocation, and allocated to the DL_UL Allocation Information about the uplink resource of the terminal to be targeted, and the terminal identifier of the terminal to which the DL_UL Allocation is directed;

The terminal 302 is configured to receive the DL_UL Allocation sent by the network device 301; when the terminal identifier of the terminal is the same as the terminal identifier included in the DL_UL Allocation, determine that the DL_UL Allocation is sent to itself; and send the DL_UL Allocation from the DL_UL Allocation to the DL_UL Allocation. The information of the downlink resource allocated to itself and the information of the uplink resource allocated to itself are obtained.

In the embodiment of the present invention, the communication system of the wireless communication system 30 may include, but is not limited to, the following communication standard communication system:

Global System of Mobile communication (GSM), Code Division Multiple Access (CDMA) IS-95, Code Division Multiple Access (CDMA) 2000, Time Division Synchronous Code Division Multiple Access (Time Division-Synchronous Code Division Multiple Access, TD-SCDMA), Wideband Code Division Multiple Access (WCDMA), Time Division Duplexing-Long Term Evolution (TDD LTE), frequency Frequency Division Duplexing-Long Term Evolution (FDD LTE), Long Term Evolution-Advanced (LTE-advanced), Personal Handy-phone System (PHS), 802.11 Wireless Fidelity (WiFi) specified in the series of protocols.

The network device 301 may include a base station, or include a base station and a radio resource management device for controlling the base station, and the terminal 302 is a terminal device that communicates with the network device 301, including a user equipment, a relay node, and the like.

For example, for LTE systems such as TDD LTE, FDD LTE or LTE-A, wireless communication systems The network device 301 in the 30 may be an evolved NodeB (eNodeB), and the terminal 302 is a User Equipment (UE); for the TD-SCDMA system or the WCDMA system, the network device 301 in the wireless communication system 30 may include Node B (NodeB), or including NodeB and Radio Network Controller (RNC), terminal 302 is UE; for GSM system, network device 301 in wireless communication system 20 may include base transceiver station (Base Transceiver Station) , BTS), or include a BTS and a Base Station Controller (BSC), the terminal 302 is a mobile station (MS); for the WiFi system, the network device 301 may include: an access point (AP) The terminal 302 can be a station (STAtion, STA).

Taking the LTE M2M system as an example, the wireless communication system 30 is an LTE M2M system, and the network device 301 and the terminal 302 communicate by using the LTE M2M mode, and the downlink control information sent by the network device 301 can be a DCI.

In an existing LTE M2M system, a DCI can support up to 2 DL Allocations (1 DL Allocation requires 48-bit bearers) and 4 UL Allocations (1 UL Allocation requires 48-bit bearers), that is, 48*6=288 bits. (bit) is used to transmit scheduling information.

If two terminals with downlink transmission need to be scheduled at the same time, the DCI scheduling can be completed by one DCI. However, for the terminal that needs to be scheduled, since the C-RNTI of DL Allocation and UL Allocation is repeated, one DCI information has 20*2= 40bit air interface waste.

In the IoT application, the number of terminals is large, and there are many terminals that need to be scheduled at the same time. If the number of terminals is increased based on the existing DCI, the waste of air interface resources will be more serious, and the efficiency of terminal scheduling will be reduced. Correspondingly, it will increase the length of time that the terminal listens to the DCI, which leads to an increase in the listening power consumption.

In the embodiment of the present invention, the DL_UL Allocation includes: information about a downlink resource allocated to the terminal, information of an uplink resource allocated to the terminal, and a terminal identifier of the terminal, so that the information of the uplink resource and the information of the downlink resource are shared. The same terminal identifier saves the overhead of the terminal identifier and avoids the waste of the air interface. When the number of terminals to be scheduled is large, the duration of monitoring the DCI of the terminal can be shortened and the power consumption can be reduced.

Moreover, the terminal can also obtain the downlink resources allocated to itself in one DL_UL Allocation. The information of the uplink resource is obtained from the DL Allocation and the uplink resource information is obtained from the UL Allocation, which reduces the complexity and processing load of the terminal processing.

In particular, when the embodiment of the present invention is applied to the LTE M2M system, the terminal 302 and the network device 301 communicate with each other by using the LTE M2M mode, and the information of the downlink resource allocated to the terminal 302 for transmitting the downlink service packet is allocated to the terminal. The information of the uplink resource used for the feedback of the downlink service packet can be sent to the terminal in the same DL_UL Allocation, so that the terminal 302 can receive the two resource information through the two DCIs respectively. After the service packet is received, the information about the allocated uplink resource has not been received, and the downlink service packet cannot be fed back. The delay and the downlink service packet transmission efficiency are reduced.

As shown in FIG. 4, in the wireless communication system 30 provided by the embodiment of the present invention, first, the network device 301 allocates downlink resources for transmitting downlink service packets and uplinks required for transmitting downlink service ACK/NACK for terminals that need to transmit downlink. The resource is indicated to the terminal by the DL_UL Allocation in the DCI. Then, the terminal 302 receives the downlink service packet sent by the network device 301 on the downlink resource allocated by the network device 301, and feeds back the downlink resource on the uplink resource allocated by the network device 301. The ACK received by the service packet.

Compared with FIG. 3, in the embodiment of the present invention, the allocation of the downlink resource and the uplink resource is sent to the terminal 302 in the same DL_UL Allocation, and the terminal does not need to wait for the UL Allocation sent by the network device 301 after receiving the downlink service packet correctly. The ACK can be sent. Compared with the scheme shown in FIG. 3, the delay of the terminal waiting for UL Allocation is reduced, and the efficiency of terminal scheduling is provided.

Optionally, the DCI further includes information about uplink resources and/or downlink resources of other terminals than the terminal 302.

Optionally, in the DL_UL Allocation, the information about the downlink resource allocated to the terminal may include at least one of the following information:

a channel identifier of a downlink channel allocated to the terminal;

The duration of the downlink resources allocated to the terminal;

The modulation and coding scheme of the downlink resources allocated to the terminal.

Optionally, in the DL_UL Allocation, the information about the uplink resource allocated to the terminal may include at least one of the following information:

a channel identifier of an uplink channel allocated to the terminal;

The duration of the uplink resource allocated to the terminal;

The modulation and coding scheme of the uplink resources allocated to the terminal.

In the existing LTE M2M system, there are two scenarios of normal coverage and enhanced coverage. In the normal coverage scenario, the length of DCI0 is fixed at 136 bits and the duration is 60 ms. In the case of enhanced coverage, the length of DCI0 is fixed at 960 ms.

FIG. 5A is a schematic diagram of periodic transmission of DCI in a normal coverage scenario. Under normal coverage, the DCI transmission period is 320 ms.

FIG. 5B is a schematic diagram of periodic transmission of DCI in an enhanced coverage scenario. Under enhanced coverage, the DCI transmission period is 5120 ms.

In the embodiment of the present invention, the existing LTE M2M system can also distinguish between two scenarios: normal coverage and enhanced coverage. When DCI is sent, DCI0 and DCI1 are transmitted in two parts.

Optionally, if the embodiment of the present invention is applied to an LTE M2M system, the DL_UL Allocation may be sent in a DCI, where the DCI includes DCI0 and DCI1, where the DCI of the DCI includes at least one DL_UL Allocation.

With this alternative, if the terminal 302 receives the DL_UL Allocation addressed to itself in DCI0, there is no need to interpret DCI1, which also reduces the complexity and processing load of the terminal processing.

Optionally, the DCI0 of the DCI may further include: check information for verifying the correctness of the DCI0, according to the check information, the terminal 302 may perform correctness check on the DCI0 in the received DCI to avoid The erroneous reception, in particular, if the terminal 302 receives the DL_UL Allocation sent to itself in the DCI0, it can determine that the DCI0 is correctly received through the verification information in the DCI0, and correctly obtain the DL_UL Allocation addressed to itself.

Optionally, the DCI of the DCI may further include: the number of uplink and downlink resource allocation information included in the DCI, so that the terminal can parse the overall message structure of the DCI according to the number, and decode the uplink and downlink resource allocation information.

Optionally, the DCI of the DCI may further include: a type indication information Type. For example, 2 bits of the first 8 bits of the reserved payload of the DCI payload shown in FIG. 1 can be modified into the type indication information type field. Different values of type may have different meanings, as shown in Table 1 below.

Table 1

The type indication information is used to indicate whether DL_UL Allocation is included in the DCI, and whether DL Allocation and/or UL Allocation is included if DL_UL Allocation is included. After the terminal 302 interprets the type in DCI0, the above information can be determined.

In addition, if the Type is not "00", the verification information in the DCI0 may be sent in other 6 bits except the type in the reserved 8 bits; and the newly added DL_ULNumber may be included in the DCI0, that is, The aforementioned field for indicating the number of DL_UL Allocations included in the DCI. This field can occupy 4 bits.

In the following, the three values of the above type field are distinguished, and the frame structure of the optional DCI is respectively described.

If Type=00, as shown in FIG. 6, the frame structure of the DCI is the same as the existing frame structure.

If Type=10, the frame structure of DCI is as shown in FIG. 7.

If Type=01, the frame structure of DCI is as shown in FIG. 8.

If Type=10, it indicates that the DCI includes a new scheduling information element DL_UL Allocation, but does not include DL Allocation, and does not include UL Allocation. After the Type field, the 6-bit DCI0 check information bits are also included, and the 4-bit DL_UL Number is also added to indicate the number of DL_UL Allocations.

The specific structure of the DL_UL Allocation is as shown in FIG. 7, and includes a 20-bit user identifier C-RNTI, downlink scheduling information (4-bit downlink channel identifier DL Channel ID, 4-bit downlink modulation and coding scheme DL MCS, and 4-bit downlink start indication DL Start Indicator). 4bit downlink duration DL Duration, 1bit downlink packet number DLPN), uplink scheduling information (4bit ACK index ACK index, 4bit uplink start indication UL Start Indicator, 3bit uplink modulation and coding scheme UL MCS, 5bit uplink duration UL Duration, 6bit The uplink channel identifies the UL Channel ID, the 1-bit uplink packet sequence ULPN, and the 1-bit reservation R), and the length is 64 bits.

Optionally, the fixed DCI0 is 136 bits, including 8 bit length Length, 2 bit type indication information Type, 6 bit DCI0 check information CRC, 16 bit ACK field ACK filed, 16 bit ACK duplicate ACK Repetition, 4 bit downlink_uplink number DL_UL Number The remaining 84 bits are enough to contain a 64-bit DL_UL Allocation.

In the prior art, a DCI can support up to 2 DL Allocations (1 DL Allocation requires 48 bit bearers) and 4 UL Allocations (1 UL Allocation requires 48 bit bearers), that is, one DCI can carry up to 288 bits of scheduling information.

In the embodiment of the present invention, for a DCI structure of Type=10 as shown in FIG. 7, a maximum of four DL_UL Allocations can be carried, that is, one DCI can carry uplink and downlink scheduling information of four terminals, which can be scheduled according to the prior art. There are more terminals (the current one DCI can only schedule the uplink and downlink of two terminals simultaneously, and the uplink of two users), and the number of bits of the DCI bearer scheduling information is reduced to 4*64=256 bits.

The DCI structure in this embodiment can be forward-compatible with the original design when Type=00, and is used in the scenario where the user only has the uplink service transmission requirement, and the UL Allocation is used to indicate the uplink resource required by the user; In the transmission requirement scenario, the DCI structure of Type=10 is used to improve scheduling efficiency.

Wherein, if Type=01, it indicates that the DCI includes at least one DL_UL Allocation, and at least one DL Allocation and/or at least one UL Allocation.

As shown in FIG. 8, for the frame structure of the DCI of Type=01 in the embodiment of the present invention, one DL_UL Allocation needs a 64-bit bearer, and one DL Allocation or UL Allocation needs to be required. In the prior art, a DCI can include two DL_UL Allocations, one DL Allocation, and two UL Allocations, that is, a DCI can be configured to carry a maximum of 288 bits of scheduling information. A DCI carries the uplink and downlink resource allocation information of two terminals, the downlink scheduling information of one terminal, and the uplink scheduling information of two terminals, which is more than the number of terminals that can be scheduled in the prior art. The uplink and downlink of the two terminals and the uplink of the two terminals are scheduled, and the effective number of bits of the DCI bearer scheduling information is reduced to 2*64+48+48*2=272 bits.

In addition, the DCI frame structure of Type=01 can be used for the scenario of multiple hybrid services, and the terminal that needs ACK for the downlink service transmission uses the DL_UL Allocation structure scheduling, and the terminal that does not need the ACK for the downlink transmission uses the DL Allocation scheduling, for the uplink. The transmitted terminal uses UL Allocation scheduling to complete scheduling of multiple services in one DCI to improve scheduling efficiency.

The frame structure of the three DCIs provided by the embodiments of the present invention is described above. If the embodiment of the present invention is applied to an LTE M2M system, the power consumption of the terminal is an urgent problem to be considered. With the embodiment of the invention, the power consumption of the terminal can be reduced, and the specific analysis is performed below.

Assume that the average power consumption of the terminal is 100mW. If there are N (N>=4 and N is even), the terminal with uplink and downlink service requirements or downlink service retransmission mechanism needs to be scheduled:

1. If the existing DCI frame structure is used, one DCI can carry at most 2 DL Allocations and 2 UL Allocations, then one DCI can schedule 2 terminals:

1) In the case of normal coverage, the duration of DCI is 200ms (DCI0 is 60ms long and DCI1 is 140ms long, totaling 0.2s). The number of air interface bits required for all terminals is 288*N/2=144*N bit, and the scheduling time is long. For 0.2s*N/2=0.1*N s, the average power consumption of the terminal listening DCI is 0.2s*2*(1+N/2)*N/4*100mW/N=10+5*N mWs, where The minimum energy consumption of the terminal listening to DCI is 0.2s*100mW=20mWs (for the terminal scheduled for the first DCI, the first DCI needs to be monitored to obtain the uplink and downlink scheduling information)

2) In the case of enhanced coverage, the DCI duration is 3200ms (4 times spread spectrum 4 times repetition, DCI0 length 960ms, DCI1 length 2240ms, total 3.2s), then the number of air interface bits required to schedule all terminals is 288*16*N /2=2304*N bit, the scheduling duration is 3.2s*N/2=1.6*N s, and the terminal monitors the DCI level. The average energy consumption is 3.2s*2*(1+N/2)*N/4*100mW/N=160+80*N mw, and the minimum energy consumption of the terminal monitoring DCI is 3.2s*100=320mWs (for the first A DCI scheduled terminal needs to listen to the first DCI to obtain uplink and downlink scheduling information.

2. If the DCI frame structure of Type=10 in the embodiment of the present invention is used, one DCI can carry at most 4 DL_UL Allocations, and one DCI can schedule 4 terminals:

1) Under normal coverage, the DCI duration is 200ms (0.2s), and the number of air interface bits required to schedule all terminals is 256*N/4=64*N bit, and the scheduling duration is 0.2s*N/4=0.05. *N s, the average power consumption of the terminal monitoring DCI is 0.2s*4*(1+N/4)*N/8*100mW/N=10+5/2*N mWs, where the terminal monitors the minimum energy consumption of DCI. It is 0.06s*100mW=6mWs (the terminal that can obtain the uplink and downlink scheduling information in the DCI0 of the first DCI information)

2) In the case of enhanced coverage, the DCI duration is 3200ms (3.2s), and the number of air interface bits required to schedule all terminals is 256*16*N/4=1024*N bit, and the scheduling duration is 3.2s*N/4. =0.8*N s, the average power consumption of the terminal monitoring DCI is 3.2s*4*(1+N/4)*N/8*100mW/N=160+40*N mWs, where the terminal monitors the minimum energy consumption of DCI. It is 0.06*16*100=96mWs (the terminal that can obtain the uplink and downlink scheduling information in the DCI0 of the first DCI information)

A comparison of various indicators using the existing DCI frame structure and the DCI frame structure using the embodiment of the present invention is listed in Table 2 (general coverage) and Table 3 (enhancement coverage) below.

Table 2

table 3

In summary, by using the DCI frame structure of the technical solution of the present invention, the terminal that needs to ACK for downlink transmission uses the new scheduling information element DL_UL Allocation to indicate the required uplink and downlink scheduling information of the terminal, which can effectively save air interface resources and improve scheduling. The efficiency of the terminal, and the power consumption of some of the scheduled terminals to monitor the DCI can be reduced accordingly.

Based on the same inventive concept, the embodiment of the present invention further provides two network devices, two types of terminals, and two methods for transmitting downlink control information. The principle of solving the problem is the same as the wireless communication system provided by the embodiment of the present invention, and their implementation may be For the implementation of the wireless communication system, for example, the implementation of the network device may refer to the implementation of the network device 301. The implementation of the terminal may refer to the implementation of the terminal 302. The implementation of the method for sending the downlink control information may refer to the implementation of the network device 301, and the downlink control. For the implementation of the method for receiving information, reference may be made to the implementation of the terminal 302, and the repeated description is omitted.

FIG. 9 is a schematic structural diagram of a first network device according to an embodiment of the present invention. As shown in FIG. 9, the network device includes:

The processing module 901 is configured to determine the uplink and downlink resource allocation information, where the uplink and downlink resource allocation information includes: information about the downlink resource allocated to the terminal for the uplink and downlink resource allocation information, and the terminal that is allocated to the uplink and downlink resource allocation information. The information of the uplink resource, and the terminal identifier of the terminal for which the uplink and downlink resource allocation information is directed;

The sending module 902 is configured to send the determined uplink and downlink resource allocation information.

Optionally, the network device uses a long-term evolution machine-to-machine LTE M2M mode communication;

The uplink and downlink resource allocation information is sent by the sending module 902 in the downlink control information DCI;

The DCI includes a fixed length portion DCI0 and a variable length portion DCI1, wherein the DCI0 of the DCI includes at least one uplink and downlink resource allocation information.

Optionally, the DCI of DCI also includes:

Verification information used to verify the correctness of the DCI of the DCI; and/or

The number of uplink and downlink resource allocation information included in the DCI.

Optionally, the DCI of DCI also includes:

The type indication information is used to indicate that the DCI includes at least one uplink and downlink resource allocation information.

Optionally, the processing module 901 is further configured to: before the sending module 902 sends the determined uplink and downlink resource allocation information to the terminal for which the uplink and downlink resource allocation information is targeted,

When determining that the downlink resource allocation information is not included in the DCI, and the uplink resource allocation information is not included, the determining type indication information is specifically used to indicate that the uplink resource allocation information is not included in the DCI, and the downlink resource allocation information is not included.

The downlink resource allocation information includes information of a downlink resource allocated to a terminal that communicates with the network device, and the uplink resource allocation information includes information of an uplink resource allocated to the terminal that communicates with the network device.

The determining the type indication information is specifically used to indicate that the DCI further includes downlink resource allocation information and/or downlink resource allocation information, when the determining that the DCI further includes the downlink resource allocation information and/or the uplink resource allocation information;

The downlink resource information includes information of a downlink resource allocated to a terminal that communicates with the network device, and the uplink resource allocation information includes information of an uplink resource allocated to the terminal that communicates with the network device.

Optionally, the sending module 902 is further configured to: send a DCI other than the DCI,

The processing module 901 is further configured to: when determining that the uplink and downlink resource allocation information is not included in the other DCI, determining the type indication information is specifically used to indicate that the uplink and downlink resource allocation information is not included in the other DCI.

Optionally, the DCI further includes: assigning to the terminal for which the uplink and downlink resource allocation information is targeted Information about uplink resources and/or downlink resources of other terminals.

Optionally, the information about the downlink resource allocated to the terminal for which the uplink and downlink resource allocation information is targeted includes at least one of the following information:

a channel identifier of a downlink channel allocated to the terminal;

The duration of the downlink resources allocated to the terminal;

a channel identifier of an uplink channel allocated to the terminal;

The duration of the uplink resource allocated to the terminal;

For other implementation details of the network device, reference may be made to the foregoing network device 301, and the repeated description is omitted.

FIG. 10 is a schematic structural diagram of a second network device according to an embodiment of the present invention. As shown in FIG. 10, the network device includes:

The processor 1001 is configured to determine uplink and downlink resource allocation information, where the uplink and downlink resource allocation information includes: information about a downlink resource allocated to the terminal for which the uplink and downlink resource allocation information is targeted, and a terminal that is allocated to the uplink and downlink resource allocation information. The information of the uplink resource, and the terminal identifier of the terminal for which the uplink and downlink resource allocation information is directed;

The transmitter 1002 is configured to send the determined uplink and downlink resource allocation information.

For details of the implementation of the processor 1001, refer to the processing module 901. For details of the implementation of the transmitter 1002, refer to the sending module 902. For other implementation details of the network device, refer to the foregoing network device 301, and details are not described herein again.

FIG. 11 is a schematic structural diagram of a first terminal according to an embodiment of the present invention. As shown in FIG. 11, the terminal includes:

The receiving module 1101 is configured to receive uplink and downlink resource allocation information sent by the network device.

The processing module 1102 is configured to: when the terminal identifier of the terminal is the same as the terminal identifier included in the uplink and downlink resource allocation information, determine that the uplink and downlink resource allocation information is sent to the terminal; Obtain the following information in the row resource allocation information:

Information about downlink resources allocated to the terminal;

Information about the uplink resources allocated to the terminal.

Optionally, the terminal communicates with the network device by using a long-term evolution machine-to-machine LTE M2M mode;

Optionally, the DCI of DCI also includes:

Optionally, the type indication information is specifically used to indicate:

The DCI further includes downlink resource allocation information and/or uplink resource allocation information.

Optionally, the receiving module 1101 is further configured to:

Receiving other DCIs sent by the network device, the type indication information in the DCI0 of the received other DCI is used to indicate that the uplink and downlink resource allocation information is not included in other DCIs.

Optionally, the DCI also includes:

Optionally, the information about the downlink resource allocated to the terminal includes at least one of the following information:

a channel identifier of a downlink channel allocated to the terminal;

The duration of the downlink resources allocated to the terminal;

a channel identifier of an uplink channel allocated to the terminal;

The duration of the uplink resource allocated to the terminal;

For other implementation details of the terminal, reference may be made to the foregoing terminal 302, and the repeated description is omitted.

FIG. 12 is a schematic structural diagram of a second terminal according to an embodiment of the present invention. As shown in FIG. 12, the terminal includes:

The receiver 1201 is configured to receive uplink and downlink resource allocation information sent by the network device.

The processor 1202 is configured to: when the terminal identifier of the terminal is the same as the terminal identifier included in the uplink and downlink resource allocation information, determine that the uplink and downlink resource allocation information is sent to the terminal; and obtain the following information from the received uplink and downlink resource allocation information. information:

Information about downlink resources allocated to the terminal;

Information about the uplink resources allocated to the terminal.

For details of the implementation of the processor 1202, refer to the processing module 1102. For details of the implementation of the receiver 1201, refer to the receiving module 1101. For other implementation details of the terminal, refer to the foregoing terminal 302, and details are not described herein again.

FIG. 13 is a flowchart of a method for sending downlink control information according to an embodiment of the present invention. As shown in Figure 13, the process includes:

S1301: The network device determines the uplink and downlink resource allocation information, where the uplink and downlink resource allocation information includes: information about the downlink resource allocated to the terminal for the uplink and downlink resource allocation information, and the uplink resource allocated to the terminal for the uplink and downlink resource allocation information. Information, and the terminal identifier of the terminal for which the uplink and downlink resource allocation information is directed;

S1302: The network device sends the determined uplink and downlink resource allocation information.

The DCI includes a fixed length portion DCI0 and a variable length portion DCI1, wherein the DCI The DCI0 includes at least one uplink and downlink resource allocation information.

Optionally, the DCI of DCI also includes:

Optionally, before the network device sends the determined uplink and downlink resource allocation information to the terminal that is used for the uplink and downlink resource allocation information, the method further includes:

Optionally, the method further includes: sending a DCI other than the DCI,

When it is determined that the uplink and downlink resource allocation information is not included in the other DCI, the determining type indication information is specifically used to indicate that the uplink and downlink resource allocation information is not included in the other DCI.

Optionally, the DCI further includes: information about uplink resources and/or downlink resources allocated to other terminals than the terminal for which the uplink and downlink resource allocation information is targeted.

a channel identifier of a downlink channel allocated to the terminal;

The duration of the downlink resources allocated to the terminal;

a channel identifier of an uplink channel allocated to the terminal;

The duration of the uplink resource allocated to the terminal;

For further implementation details of the method, reference may be made to the foregoing processing of the network device 301, and the repeated description is not repeated.

FIG. 14 is a flowchart of a method for receiving downlink control information according to an embodiment of the present invention. As shown in FIG. 14, the method includes the following steps:

S1401: The terminal receives uplink and downlink resource allocation information sent by the network device.

S1402: The terminal determines that the uplink and downlink resource allocation information is sent to itself when the terminal identifier of the terminal identifier is the same as the terminal identifier included in the uplink and downlink resource allocation information, and obtains the following information from the received uplink and downlink resource allocation information:

Information assigned to its own downstream resources;

Information assigned to its own upstream resources.

Optionally, the DCI of DCI also includes:

Optionally, the type indication information is specifically used to indicate:

Optionally, it also includes:

The terminal receives the other DCIs sent by the network device, and the type indication information in the received DCI0 of the other DCI is used to indicate that the uplink and downlink resource allocation information is not included in the other DCI.

Optionally, the DCI also includes:

Optionally, the information of the downlink resource allocated to itself includes at least one of the following information:

a channel identifier of a downlink channel allocated to the terminal;

The duration of the downlink resources allocated to the terminal;

The information allocated to its own uplink resource includes at least one of the following information:

a channel identifier of an uplink channel allocated to the terminal;

The duration of the uplink resource allocated to the terminal;

In summary, in the embodiment of the present invention, an uplink and downlink resource allocation information is added, where the uplink and downlink resource allocation information includes: information about a downlink resource allocated to a terminal, information of an uplink resource allocated to the terminal, and a terminal. The terminal identifier is such that the information of the uplink resource and the information of the downlink resource share the same terminal identifier, which saves the overhead of the terminal identifier and avoids waste of air interface. When the number of terminals to be scheduled is large, the duration of monitoring the DCI by the terminal can also be shortened, and power consumption can be reduced.

Moreover, the terminal can also obtain the downlink resource allocated to itself in an uplink and downlink resource allocation information. The source information and the uplink resource information, instead of obtaining the downlink resource information from the DL Allocation and the uplink resource information from the UL Allocation, reduce the complexity and processing load of the terminal processing.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a general purpose computer, a special purpose computer, An processor of an embedded processor or other programmable data processing device to generate a machine such that instructions executed by a processor of a computer or other programmable data processing device are generated for implementation in a flow or a flow of flowcharts and/or Or a block diagram of a device in a box or a function specified in a plurality of boxes.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

While the preferred embodiment of the invention has been described, it will be understood that Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and

It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the invention

Claims

A network device, comprising:

a processing module, configured to determine uplink and downlink resource allocation information, where the uplink and downlink resource allocation information includes: information about a downlink resource allocated to the terminal for the uplink and downlink resource allocation information, and information allocated to the uplink and downlink resource allocation information Information about the uplink resource of the terminal, and the terminal identifier of the terminal for which the uplink and downlink resource allocation information is targeted;

And a sending module, configured to send the determined uplink and downlink resource allocation information.
The network device according to claim 1, wherein the network device uses a long term evolution machine to machine LTE M2M mode communication;

The uplink and downlink resource allocation information is sent by the sending module in the downlink control information DCI;

The DCI includes a fixed length portion DCI0 and a variable length portion DCI1, wherein the DCI0 of the DCI includes at least one of the uplink and downlink resource allocation information.
The network device according to claim 2, wherein the DCI of the DCI further comprises:

Checking information for verifying the correctness of the DCI of the DCI; and/or

The number of the uplink and downlink resource allocation information included in the DCI.
The network device according to claim 2 or 3, wherein the DCI of the DCI further includes:

The type indication information is used to indicate that the DCI includes at least one of the uplink and downlink resource allocation information.
The network device according to claim 4, wherein the processing module is further configured to: send, by the sending module, the determined uplink and downlink resource allocation information to the terminal targeted by the uplink and downlink resource allocation information prior to,

When it is determined that the downlink resource allocation information is not included in the DCI, and the uplink resource allocation information is not included, determining that the type indication information is specifically used to indicate that the uplink resource is not included in the DCI. The allocation information does not include the downlink resource allocation information;

The downlink resource allocation information includes information of a downlink resource allocated to a terminal that communicates with the network device, where the uplink resource allocation information includes information of an uplink resource allocated to a terminal that communicates with the network device.
The network device according to claim 4, wherein the processing module is further configured to: send, by the sending module, the determined uplink and downlink resource allocation information to the terminal targeted by the uplink and downlink resource allocation information prior to,

Determining, when the determining that the DCI further includes the downlink resource allocation information and/or the uplink resource allocation information, the type indication information is used to indicate that the DCI further includes the downlink resource allocation information and/or the downlink resource. Assign information;

The downlink resource information includes information of a downlink resource allocated to a terminal that communicates with the network device, where the uplink resource allocation information includes information of an uplink resource allocated to a terminal that communicates with the network device.
The network device according to any one of claims 4 to 6, wherein the sending module is further configured to: send another DCI other than the DCI,

The processing module is further configured to: when it is determined that the other uplink and downlink resource allocation information is not included in the other DCI, determine that the type indication information is specifically used to indicate that the uplink and downlink resource allocation is not included in the other DCI. information.
The network device according to any one of claims 2 to 7, wherein the DCI further includes: uplink resources allocated to other terminals than the terminal for which the uplink and downlink resource allocation information is directed, and/or Downstream resource information.
A network device according to any one of claims 1 to 8, characterized in that

The information of the downlink resource allocated to the terminal for which the uplink and downlink resource allocation information is targeted includes at least one of the following information:

a channel identifier of a downlink channel allocated to the terminal;

The duration of the downlink resources allocated to the terminal;

a modulation and coding scheme of downlink resources allocated to the terminal; and/or

The information of the uplink resource allocated to the terminal includes at least one of the following information:

a channel identifier of an uplink channel allocated to the terminal;

The duration of the uplink resource allocated to the terminal;

The modulation and coding scheme of the uplink resource allocated to the terminal.
A terminal, comprising:

a receiving module, configured to receive uplink and downlink resource allocation information sent by the network device;

a processing module, configured to: when the terminal identifier of the terminal is the same as the terminal identifier included in the uplink and downlink resource allocation information, determine that the uplink and downlink resource allocation information is sent to the terminal; Obtain the following information in the description of the downlink resource allocation information:

Information of downlink resources allocated to the terminal;

Information of uplink resources allocated to the terminal.
The terminal according to claim 10, wherein the terminal communicates with the network device by using a long term evolution machine-to-machine LTE M2M mode;

The uplink and downlink resource allocation information is sent by the network device in the downlink control information DCI;

The DCI includes a fixed length portion DCI0 and a variable length portion DCI1, wherein the DCI0 of the DCI includes at least one of the uplink and downlink resource allocation information.
The terminal according to claim 11, wherein the DCI of the DCI further includes:

Checking information for verifying the correctness of the DCI of the DCI; and/or

The number of the uplink and downlink resource allocation information included in the DCI.
The terminal according to claim 11 or 12, wherein the DCI of the DCI further includes:

The type indication information is used to indicate that the DCI includes at least one of the uplink and downlink resource allocation information.
The terminal according to claim 13, wherein the type indication information is specifically used to indicate:

The downlink resource allocation information is not included in the DCI, and the downlink resource allocation information is not included; or

The DCI further includes downlink resource allocation information and/or uplink resource allocation information;

The downlink resource allocation information includes information of a downlink resource allocated to a terminal that communicates with the network device, where the uplink resource allocation information includes information of an uplink resource allocated to a terminal that communicates with the network device.
The terminal according to claim 13 or 14, wherein the receiving module is further configured to:

And receiving the other DCI sent by the network device, and the type indication information in the received DCI0 of the other DCI is used to indicate that the uplink and downlink resource allocation information is not included in the other DCI.
The terminal according to any one of claims 11 to 15, wherein the DCI further includes:

Information of uplink resources and/or downlink resources allocated to other terminals than the terminal.
A terminal according to any one of claims 10 to 16, wherein:

The information about the downlink resource allocated to the terminal includes at least one of the following information:

a channel identifier of a downlink channel allocated to the terminal;

The duration of the downlink resource allocated to the terminal;

a modulation and coding scheme of downlink resources allocated to the terminal; and/or

The information about the uplink resource allocated to the terminal includes at least one of the following information:

a channel identifier of an uplink channel allocated to the terminal;

The duration of the uplink resource allocated to the terminal;

The modulation and coding scheme of the uplink resource allocated to the terminal.
A method for transmitting downlink control information, comprising:

The network device determines uplink and downlink resource allocation information, where the uplink and downlink resource allocation information includes: information about a downlink resource allocated to the terminal for which the uplink and downlink resource allocation information is targeted, and information allocated to the uplink and downlink resource allocation information Information about uplink resources of the terminal, and the uplink and downlink resource allocation The terminal identifier of the terminal to which the information is directed;

The network device sends the determined uplink and downlink resource allocation information.
The method according to claim 18, wherein said network device uses a long term evolution machine to machine LTE M2M mode communication;

The uplink and downlink resource allocation information is sent by the network device in the downlink control information DCI;

The DCI includes a fixed length portion DCI0 and a variable length portion DCI1, wherein the DCI0 of the DCI includes at least one of the uplink and downlink resource allocation information.
The method of claim 19, wherein the DCI of the DCI further comprises:

Checking information for verifying the correctness of the DCI of the DCI; and/or

The number of the uplink and downlink resource allocation information included in the DCI.
The method according to claim 18 or 19, wherein the DCI of the DCI further comprises:

The type indication information is used to indicate that the DCI includes at least one of the uplink and downlink resource allocation information.
The method of claim 21, wherein before the network device sends the determined uplink and downlink resource allocation information to the terminal for which the uplink and downlink resource allocation information is directed, the method further includes:

When it is determined that the downlink resource allocation information is not included in the DCI, and the uplink resource allocation information is not included, determining that the type indication information is specifically used to indicate that the uplink resource allocation information is not included in the DCI, and the Describe the downlink resource allocation information;

The downlink resource allocation information includes information of a downlink resource allocated to a terminal that communicates with the network device, where the uplink resource allocation information includes information of an uplink resource allocated to a terminal that communicates with the network device.
The method of claim 21 wherein said network device is to determine Before the uplink and downlink resource allocation information is sent to the terminal that is used for the uplink and downlink resource allocation information, the method further includes:

Determining, when the determining that the DCI further includes the downlink resource allocation information and/or the uplink resource allocation information, the type indication information is used to indicate that the DCI further includes the downlink resource allocation information and/or the downlink resource. Assign information;

The downlink resource information includes information of a downlink resource allocated to a terminal that communicates with the network device, where the uplink resource allocation information includes information of an uplink resource allocated to a terminal that communicates with the network device.
The method according to any one of claims 21 to 23, wherein the method further comprises: transmitting a DCI other than the DCI,

When it is determined that the uplink and downlink resource allocation information is not included in the other DCI, determining that the type indication information is specifically used to indicate that the uplink and downlink resource allocation information is not included in the other DCI.
The method according to any one of claims 19 to 24, wherein the DCI further includes: an uplink resource and/or a downlink allocated to other terminals than the terminal for which the uplink and downlink resource allocation information is targeted. Resource information.
A method according to any one of claims 18 to 25, wherein

The information of the downlink resource allocated to the terminal for which the uplink and downlink resource allocation information is targeted includes at least one of the following information:

a channel identifier of a downlink channel allocated to the terminal;

The duration of the downlink resources allocated to the terminal;

a modulation and coding scheme of downlink resources allocated to the terminal; and/or

The information of the uplink resource allocated to the terminal includes at least one of the following information:

a channel identifier of an uplink channel allocated to the terminal;

The duration of the uplink resource allocated to the terminal;

The modulation and coding scheme of the uplink resource allocated to the terminal.
A method for receiving downlink control information, comprising:

Receiving, by the terminal, uplink and downlink resource allocation information sent by the network device;

When the terminal identifier of the terminal is the same as the terminal identifier included in the uplink and downlink resource allocation information, the terminal determines that the uplink and downlink resource allocation information is sent to itself;

The terminal obtains the following information from the received uplink and downlink resource allocation information:

Information assigned to its own downstream resources;

Information assigned to its own upstream resources.
The method according to claim 27, wherein the terminal communicates with the network device by using a long term evolution machine-to-machine LTE M2M mode;

The uplink and downlink resource allocation information is sent by the network device in the downlink control information DCI;

The DCI includes a fixed length portion DCI0 and a variable length portion DCI1, wherein the DCI0 of the DCI includes at least one of the uplink and downlink resource allocation information.
The method of claim 28, wherein the DCI of the DCI further comprises:

Checking information for verifying the correctness of the DCI of the DCI; and/or

The number of the uplink and downlink resource allocation information included in the DCI.
The method according to claim 28 or 29, wherein the DCI of the DCI further comprises:

The type indication information is used to indicate that the DCI includes at least one of the uplink and downlink resource allocation information.
The method of claim 30, wherein the type indication information is specifically used to indicate:

The downlink resource allocation information is not included in the DCI, and the downlink resource allocation information is not included; or

The DCI further includes downlink resource allocation information and/or uplink resource allocation information;

The downlink resource allocation information includes information of a downlink resource allocated to a terminal that communicates with the network device, where the uplink resource allocation information includes a terminal that is allocated to communicate with the network device. Information about the uplink resources.
The method of claim 30 or 31, further comprising:

The terminal receives the other DCI sent by the network device, and the type indication information in the received DCI0 of the other DCI is used to indicate that the uplink and downlink resource allocation information is not included in the other DCI.
The method according to any one of claims 28 to 32, wherein the DCI further comprises:

Information of uplink resources and/or downlink resources allocated to other terminals than the terminal.
A method according to any one of claims 27 to 33, wherein

The information allocated to the downlink resource of the self includes at least one of the following information:

a channel identifier of a downlink channel allocated to the terminal;

The duration of the downlink resource allocated to the terminal;

a modulation and coding scheme of downlink resources allocated to the terminal; and/or

The information allocated to the uplink resource of itself includes at least one of the following information:

a channel identifier of an uplink channel allocated to the terminal;

The duration of the uplink resource allocated to the terminal;

The modulation and coding scheme of the uplink resource allocated to the terminal.