WO2013174167A1

WO2013174167A1 - Method for transmitting downlink control information, user equipment and base station

Info

Publication number: WO2013174167A1
Application number: PCT/CN2013/072180
Authority: WO
Inventors: 夏金环
Original assignee: 华为技术有限公司
Priority date: 2012-05-23
Filing date: 2013-03-05
Publication date: 2013-11-28
Also published as: CN103427970A; CN103427970B

Abstract

A method for transmitting downlink control information, a user equipment and a base station. The method comprises: receiving common downlink control information DCI from a base station, the common DCI being used for indicating a resource occupied by a first common message for a first type of user equipment UE and a resource occupied by a second common message for a second type of UE in physical downlink shared channel PDSCH resources; and detecting, according to the common DCI, the first common message in the resource occupied by the first common message or the second common message in the resource occupied by the second common message. In embodiments of the present invention, because the common DCI indicates two common messages for two types of UEs, when the base station transmits the two common messages indicated by the common DCI, each of the two types of UEs can detect a respective common message according to the common DCI, thereby improving transmission efficiency of the common message.

Description

Method for transmitting downlink control information, user equipment, and base station

This application claims the priority of the Chinese patent application filed on May 23, 2012, the Chinese Patent Office, Application No. 201210161411.X, entitled "Methods for transmitting downlink control information, user equipment and base stations", the entire contents of which are The citations are incorporated herein by reference.

Technical field

The present invention relates to the field of communications, and in particular, to a method of transmitting downlink control information, a user equipment, and a base station. Background technique

Resource allocation in Long Term Evolution (LTE) systems by evolved base stations

(evolved NodeB, eNB) unified scheduling. If the base station has downlink data to be sent to the user equipment (User Equipment, UE), the downlink data symbol needs to be mapped on the time-frequency resource and transmitted in the current subframe within a Transmission Time Interval (TTI). The downlink control information (DCI) is used to indicate scheduling information such as the location of the downlink data on the time-frequency resource and the modulation and coding mode of the data. Dedicated downlink data that only one UE needs to receive and detect in a TTI is indicated by a dedicated DCI. Common downlink data received and detected by multiple UEs in one TTI is indicated by a public DCI, which may also be referred to as a public message, and may include a paging message, System Information (SI), or a random access response. Message (Random Access Response, RAR), etc.

Since the receiving capability of multiple UEs is different, in order to ensure that UEs with different receiving capabilities can receive public messages, the bandwidth occupied by the base station when transmitting the public message cannot exceed the receiving capability of the UE with lower capability. The transmission of public messages is inefficient. How UEs of different capabilities receive public messages on the premise of maximizing transmission efficiency becomes a problem.

Summary of the invention

The embodiment of the invention provides a method for transmitting downlink control information, a user equipment, and a base station, so that two types are provided.

The UE can detect the respective public messages according to the public DCI.

In one aspect, a method for transmitting downlink control information is provided, including: receiving, from a base station, a common downlink control information DCI, where the common DCI is used to indicate a pin in a physical downlink shared channel PDSCH resource. The resource occupied by the first common message of the first type of user equipment UE and the resource occupied by the second public message of the second type of UE; according to the public DCI, detecting the resource occupied by the first public message The first public message or the second public message among the resources occupied by the second public message.

In another aspect, a method for transmitting downlink control information is provided, including: generating common downlink control information DCI, where the common DCI is used to indicate a first public message for a first type of user equipment UE in a physical downlink shared channel PDSCH resource. The occupied resource and the resource occupied by the second public message for the second type of UE; sending the public DCI to the first type of UE and the second type of UE, and the resource occupied by the first public message is first The class UE sends the first public message or the resource occupied by the second public message to send the second public message to the second type of UE.

In another aspect, a method for transmitting downlink control information is provided, including: receiving public downlink control information DCI scrambled by an identifier, where the common DCI is used to indicate that the user equipment UE is in the physical downlink shared channel PDSCH resource. The resource occupied by the public message; when it is determined that the identifier is an identifier corresponding to the UE, the public message of the UE is detected in the resource occupied by the public message according to the public DCI.

In another aspect, a method for transmitting downlink control information is provided, comprising: generating a common downlink control information DCI scrambled by an identifier, the identifier corresponding to a category of a user equipment UE, the identifier being used to indicate the public DCI And belonging to the UE, the common DCI is used to indicate a resource occupied by a common message for the UE in the physical downlink shared channel PDSCH resource; sending the public DCI to the UE, and the resource occupied by the public message to the UE Send the public message.

On the other hand, a user equipment is provided, including: a receiving unit, configured to receive, from a base station, a common downlink control information DCI, where the common DCI is used to indicate that the first type of user equipment UE is in the physical downlink shared channel PDSCH resource. a resource occupied by a common message and a resource occupied by a second public message for the second type of UE; a detecting unit, configured to detect the first public message in a resource occupied by the first public message according to the public DCI Or the second public message in the resource occupied by the second public message.

In another aspect, a base station is provided, including: a generating unit, configured to generate a common downlink control information DCI, where the common DCI is used to indicate a first public message for a first type of user equipment UE in a physical downlink shared channel PDSCH resource The occupied resource and the resource occupied by the second public message for the second type of UE; the sending unit, configured to send the public DCI to the first type of UE and the second type of UE, and occupy the first public message The resource sends the first public message to the first type of UE or The resource occupied by the second public message sends the second public message to the second type of UE.

On the other hand, a user equipment is provided, including: a receiving unit, configured to receive a common downlink control information DCI scrambled by an identifier, where the common DCI is used to indicate that the user equipment UE is in the physical downlink shared channel PDSCH resource. a resource occupied by the public message; a detecting unit, configured to: when determining that the identifier is an identifier corresponding to the UE, detect a public message of the UE in a resource occupied by the public message according to the public DCI.

In another aspect, a base station is provided, including: a generating unit, configured to generate a common downlink control information DCI scrambled by an identifier, where the identifier corresponds to a category of a user equipment UE, the identifier is used to indicate the public DCI The public DCI is used to indicate the resource occupied by the public message for the UE in the physical downlink shared channel (PDSCH) resource; the sending unit is configured to send the public DCI to the UE, and is occupied by the public message. The resource sends the public message to the UE.

In the embodiment of the present invention, since the common DCI indicates two common messages for the two types of UEs, when the base station transmits the two common messages indicated by the common DCI, the two types of UEs can respectively detect the respective public messages according to the common DCI. , thereby improving the transmission efficiency of public messages. 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. It is obvious that the drawings described below are only some embodiments of the present invention, Those skilled in the art can also obtain other drawings based on these drawings without paying any creative work.

1 is a schematic flow chart of a method of transmitting a DCI according to an embodiment of the present invention.

2 is a schematic flow chart of a method of transmitting a DCI according to an embodiment of the present invention.

3 is a schematic flow chart of a process of a method of transmitting a DCI according to an embodiment of the present invention. 4 is a map of a first common message and a second common message in a PDSCH resource, in accordance with one embodiment of the present invention.

FIG. 5 is a map of a first public message and a second public message in a PDSCH resource according to another embodiment of the present invention.

6 is a schematic flow chart of a method of transmitting a DCI according to an embodiment of the present invention.

FIG. 7 is a schematic flow chart of a method of transmitting a DCI according to an embodiment of the present invention.

FIG. 8 is a schematic block diagram of a user equipment according to an embodiment of the present invention. 9 is a schematic block diagram of a base station in accordance with an embodiment of the present invention.

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

11 is a schematic block diagram of a base station according to an embodiment of the present invention. detailed description

BRIEF DESCRIPTION OF THE DRAWINGS The technical solutions in the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of the present invention.

The technical solution of the present invention can be applied to various communication systems, for example: Global mobile communication system

(Global System of Mobile communication, GSM), Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access Wireless (WCDMA), General Packet Radio Service (General Packet Radio Service, GPRS), LTE, etc.

The UE may also be referred to as a mobile terminal (MT), a mobile user equipment, etc., and may communicate with one or more core networks via a radio access network (eg, Radio Access Network, RAN), and the user equipment may be mobile. A terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal, for example, can be a portable, pocket, handheld, computer built-in or in-vehicle mobile device.

The base station may be a Base Transceiver Station (BTS) in GSM or CDMA, or may be a base station (NodeB) in WCDMA, or may be an eNB or an e-NodeB in LTE, and the present invention is not limited thereto.

1 is a schematic flow chart of a method of transmitting a DCI according to an embodiment of the present invention. The method of Figure 1 is performed by a UE, for example, a first type of UE or a second type of UE.

110. Receive a public DCI from a base station, where the public DCI is used to indicate that the physical downlink shared channel

(Physical Downlink Shared Channel, PDSCH) A resource occupied by a first common message for a first type of UE and a second public message for a second type of UE.

It should be noted that, in the embodiment of the present invention, the first type of UE and the second type of UE may be divided according to the capabilities of the UE. For example, the first type of UE may have a higher receiving capability, and may be referred to as a high-capacity UE. Downstream data for full band bandwidth. The second type of UE has lower receiving capability, It is called a low-capacity UE and can only receive data in part of the bandwidth and cannot receive data in the full-band bandwidth. The UEs of the first type and the second type of UEs may also be divided according to other attribute information of the UE, which is not limited by the embodiment of the present invention.

In this embodiment of the present invention, the common DCI indicates a resource occupied by a first common message for a first type of UE in a PDSCH resource and a resource occupied by a second public message for a second type of UE in a PDSCH resource, that is, Two common messages for two types of UEs can be indicated by one common DCI, which can improve resource utilization.

Optionally, as an embodiment, the common DCI may include a first part of the DCI and a second part of the DCI, where the first part of the DCI includes a first downlink resource block allocation field, where the first downlink resource block allocation field is used to indicate the first common message. The starting position and number of PRBs occupied in the PDSCH resource. The second part of the DCI includes a second downlink resource block allocation field, and the second downlink resource block allocation field is used to indicate the number of physical resource blocks (PRBs) occupied by the second common message in the PDSCH resource.

Optionally, as another embodiment, the second part of the DCI may be dedicated by the second type of UE. The first part of the DCI can be used by the first type of UE and the second type of UE, which can save resources.

Optionally, as another embodiment, the public DCI may further include a third part DCI, where the third part DCI may be used to indicate that the public DCI indicates two common messages.

For example, the third portion of the DCI may also indicate that the public DCI indicates the first common message for the first type of UE, at which time the public DCI is used by the first type of UE. The first type of UE may detect its own first public message according to the public DCI. At this time, the public DCI may include used fields in the public DCI of the prior art, and the definition of each field is similar to the prior art, in order to avoid duplication, I will not repeat them here. In addition, the third part of the DCI may also indicate that the public DCI indicates a common message, and the first type UE and the second type UE both receive the public message, that is, the first type UE and the second type UE need to receive the same public message. In this case, the common DCI may include the used field in the public DCI of the prior art, and the first type UE and the second type UE both detect the public message indicated by the public DCI according to the public DCI, and the specific process may refer to the current There are techniques, in order to avoid repetition, we will not repeat them here.

120. Detect, according to the public DCI, a first public message in a resource occupied by the first public message or a second public message in a resource occupied by the second public message.

When the method is performed by the first type of UE, the first type of UE may detect the first public message in the resource occupied by the first public message according to the public DCI. Specifically, the first type of UE may be according to the first Part of the DCI detects the first public message.

When the method is performed by the second type of UE, the second type of UE may detect the second public message in the resource occupied by the second public message according to the public DCI. Specifically, the second type of UE may detect the second common message according to the first part of the DCI and the second part of the DCI.

Optionally, as another embodiment, the second type of UE may determine, according to the first downlink resource block allocation field, an end position of the PRB occupied by the first common message in the PDSCH resource, and the next PRB of the end position. The location of the PRB occupied by the PDSCH resource as the second common message, the starting position of the PRB occupied in the PDSCH resource according to the second common message, and the number of PRBs occupied by the second common message in the PDSCH resource, A second public message is detected in a resource occupied by the second public message.

Specifically, the location of the second public message in the PDSCH resource and the location of the first public message in the PDSCH resource may be adjacent, that is, adjacent to the last PRB occupied by the first common message in the PDSCH resource. One PRB is the first PRB occupied by the second public message in the PDSCH resource. In this way, it is not necessary to indicate to the second type of UE in the public DCI the starting position of the PRB occupied by the second common message in the PDSCH resource, thereby saving the overhead of the public DCI.

Optionally, as another embodiment, when the method is performed by the second type of UE, the second type of UE may be in the PDSCH resource according to the starting position of the PRB occupied by the second common message in the PDSCH resource and the second common message. The number of PRBs occupied in the second public message is detected in the resource occupied by the second public message, and the starting position of the PRB occupied by the second public message in the PDSCH resource may be predefined.

Optionally, as another embodiment, the predefined starting location of the PRB occupied by the second common message in the PDSCH resource may be indicated by system information or Radio Resource Control (RRC) signaling. Or it may be a fixed position in the PDSCH resource, or may be the starting position of the dedicated subband of the second type UE in the PDSCH resource, or may be a position offset from the starting position of the dedicated subband by a fixed frequency domain.

The dedicated subband may be a dedicated subband that is divided for the second type of UE. For example, when the second type of UE is a low-capacity UE, it can only receive data in a part of the bandwidth, for example, can only receive data of 1/4 system bandwidth, then the 1/4 bandwidth can be called a dedicated sub-band of the low-capability UE. . For a specific location of the dedicated subband in the entire system bandwidth, the second type of UE may be obtained by means of high layer signaling or frequency hopping sent by the base station. In this way, it is not necessary to indicate to the second type of UE in the public DCI that the second public message accounts for PDSCH resources. The starting position of the PRB used, thereby saving the overhead of the public DCI.

In the embodiment of the present invention, since the common DCI indicates two common messages for the two types of UEs, when the base station transmits the two common messages indicated by the common DCI, the two types of UEs can respectively detect the respective public messages according to the common DCI. , thereby improving the transmission efficiency of public messages.

2 is a schematic flow chart of a method of transmitting a DCI according to an embodiment of the present invention. The method of Figure 2 is performed by a base station.

210. Generate a public DCI, where the common DCI is used to indicate resources occupied by a first common message for a first type of UE in a PDSCH resource and a second common message for a second type of UE.

It should be noted that, in the embodiment of the present invention, the first type of UE and the second type of UE may be divided according to the capabilities of the UE. For example, the first type of UE may have a higher receiving capability, and may be referred to as a high-capacity UE. Downstream data for full band bandwidth. The second type of UE has lower receiving capability and can be called a low-capacity UE. It can only receive data in part of the bandwidth and cannot receive data in the full-band bandwidth. The first type of UE and the second type of UE may be further divided according to other attribute information of the UE, which is not limited by the embodiment of the present invention.

Optionally, as an embodiment, the common DCI may include a first part of the DCI and a second part of the DCI, where the first part of the DCI may include a first downlink resource block allocation field, where the first downlink resource block allocation field is used to indicate the first public The starting position and number of PRBs that the message occupies in the PDSCH resource. The second part DCI may include a second downlink resource block allocation field, where the second downlink resource block allocation field is used to indicate the number of PRBs occupied by the second common message in the PDSCH resource. .

Optionally, as another embodiment, the location of the next PRB of the end position of the PRB occupied by the first common message in the PDSCH resource may be the starting position of the PRB occupied by the second common message in the PDSCH resource. Or the starting position of the PRB occupied by the second common message in the PDSCH resource may be predefined, where the starting position of the PRB occupied by the second common message in the PDSCH resource may be indicated by system information or RRC signaling, Or a fixed position in the PDSCH resource, or a starting position of a dedicated subband of the second type UE in the PDSCH resource, or a position offset from the starting position of the dedicated subband by a fixed frequency domain.

220. Send the public DCI to the first type UE and the second type UE, and in the first public message. The first public message is sent to the first type of UE or the second public message is sent to the second type of UE in the resource occupied by the second public message.

Specifically, if the base station determines to send two common messages to the first type of UE and the second type of UE respectively, the third part of the DCI may be used to indicate that the public DCI indicates two common messages. If the base station determines to transmit only the first common message to the first type of UE, the third partial DCI may indicate that the public DCI indicates the first common message for the first type of UE, at which time the public DCI is used by the first type of UE. The first type of UE may detect its own first public message according to the public DCI. At this time, the public DCI may include used fields in the public DCI of the prior art, and the definition of each field is similar to the prior art, in order to avoid duplication, I will not repeat them here. In addition, if the base station determines to send the same common message to the first type of UE and the second type of UE, the third part of the DCI may indicate that the public DCI indicates a common message, and at this time, the public DCI may include the public DCI of the prior art. The used field, the UE of the first type and the UE of the second type are all detected by the public DCI according to the common DCI. The specific process may refer to the prior art. To avoid repetition, details are not described herein again.

After the first type of UE and the second type of UE receive the public DCI, the first type of UE may detect its own first public message according to the public DCI, and the second type of UE may detect its second public message according to the public DCI. .

In the embodiment of the present invention, since the common DCI indicates two common messages for the two types of UEs, the base station can separately transmit the common messages of the two types of UEs respectively, thereby improving the transmission efficiency of the common message.

The embodiments of the present invention will be described in detail below with reference to specific examples.

3 is a schematic flow chart of a process of a method of transmitting a DCI according to an embodiment of the present invention.

301. The base station generates a common DCI, where the common DCI may indicate resources occupied by the first common message for the first type of UE in the PDSCH resource and resources occupied by the second common message for the second type of UE in the PDSCH resource.

The common DCI may include a first partial DCI and a second partial DCI, the first partial DCI being used to indicate the first common message, and the first partial DCI and the second partial DCI may be used to indicate the second public message. Therefore, the first partial DCI can be shared by the first type of UE and the second type of UE, and the second partial DCI can be dedicated by the second type of UE. The length of the common DCI may be the same as the length of the public DCI in the prior art, the first part of the DCI may include bits used in the prior art common DCI, and the second part of the DCI may be retained in the public DCI of the prior art. The bits, the base station and the second type of UE may predefine the reserved bits as fields specific to the second type of UE.

The first part of the DCI may include a first downlink resource block allocation field, where the first downlink resource block allocation field may be used to indicate a location of the first common message in the PDSCH resource for the first type of UE, that is, the first public message is The starting position and number of PRBs occupied in the PDSCH resource.

The first part of the DCI may further include a first PUCCH power control field, similar to the PUCCH power control field in the public DCI of the prior art, where the first PUCCH power control field may be used to indicate a bit of the transport block sent by the base station to the first type of UE. The number of corresponding PRBs.

The first part of the DCI may further include a Modulation and Coding Scheme (MCS) field, and the MCS field may be used to indicate a modulation mode used for the first common message and the second common message, and to the first class UE and the second The index corresponding to the transport block sent by the UE.

In addition, the first part of the DCI may also include other used fields in the public DCI of the prior art, such as format 0 and 1A difference identification fields, virtual resource block allocation type identification fields, and new data indication fields, etc., the definitions of these fields may be referred to In the prior art, in order to avoid repetition, details are not described herein again.

The second part of the DCI may include a second downlink resource block allocation field, and the second downlink resource block allocation field may be used to indicate the number of PRBs occupied by the PDSCH resource for the second common message of the second type of UE. For example, the length of the second downlink resource block allocation field may be 2 bits, and the mapping relationship between the 2nd bit of the second downlink resource block allocation field and the resource length occupied by the second common message may be defined, as shown in Table 1.

Table 1 Mapping between the second downlink resource allocation field and the number of PRBs occupied by the second common message Bit indication Bandwidth length

00 1/4 narrow bandwidth

01 1/2 narrow bandwidth

10 3/4 narrow bandwidth The narrow bandwidth may indicate the bandwidth that the second type of UE can support, and may also refer to the total number of PRBs that can be received.

It should be noted that the above-described examples of Table 1 are only intended to assist those skilled in the art to better understand the embodiments of the present invention, and do not limit the scope of the embodiments of the present invention. For example, the length of the second downlink resource block allocation field may be other number of bits, and the mapping between the second downlink resource block allocation field and the number of PRBs occupied by the second common message may also be other mapping relationships. Not limited.

In addition, the starting position of the second public message in the PDSCH resource can be determined in different ways without indicating in the public DCI, which can save the overhead of the public DCI.

Optionally, the location of the second common message in the PDSCH resource may be adjacent to the location of the first common message in the PDSCH resource, and the starting position of the occupied PRB may be occupied by the first common message in the PDSCH resource. The position of the next PRB at the end of the PRB.

The following description will be made with reference to specific examples. 4 is a map of a first public message and a second common message in a PDSCH resource, in accordance with one embodiment of the present invention. In Fig. 4, the positional relationship of the first public message and the second public message in the LTE Release 8 system in the PDSCH resource is described. In this way, it is not necessary to indicate to the second type of UE in the public DCI the starting position of the PRB occupied by the second common message in the PDSCH resource, thereby saving the overhead of the public DCI.

Optionally, the starting position of the second public message in the PDSCH resource may be predefined. For example, the starting position of the PRB occupied by the second common message in the PDSCH resource may be indicated by system information or RRC signaling, or may be a fixed position in the PDSCH resource, or may be a second type of UE in the PDSCH resource. The starting position of the dedicated subband, or may be a fixed frequency domain offset from the starting position of the dedicated subband. The following will be explained in conjunction with specific examples. Figure 5 is a map of a first public message and a second public message in a PD SCH resource according to another embodiment of the present invention.

In FIG. 5, it is assumed that the starting position of the second common message in the PDSCH resource is the starting position of the dedicated subband of the second class UE in the PDSCH resource. The location of the dedicated sub-band may be determined by means of high-level signaling indication or frequency hopping. In this way, it is not necessary to indicate to the second type of UE in the common DCI the starting position of the PRB occupied by the second common message in the PDSCH resource, thereby saving the overhead of the common DCI. 302. The base station sends, to the first type of UE and the second type of UE, the public DCI generated in step 301, and sends the first public message to the first type of UE and the second public message in the resource occupied by the first public message. A second public message is sent to the second type of UE in the resource.

303. The first type of UE detects the first public message in the resource occupied by the first public message according to the public DCI in step 302.

Specifically, the first type of UE may detect the first public message in the resource occupied by the first public message according to the first part of the DCI in the public DCI. For example, the first type of UE may determine, according to the first downlink resource block allocation field, a starting position and number of PRBs occupied by the first common message in the PDSCH resource. The first type of UE may determine the modulation mode of the first common message and the index corresponding to the transport block sent by the base station to itself according to the MCS field. The first type of UE may also determine the number of bits of the transport block according to the first PUCCH power control field and the MCS field. The specific operation process of the first type of UE for detecting the first public message may refer to the prior art. To avoid repetition, details are not described herein again.

304. The second type of UE detects the second type of public message in the resource occupied by the second public message according to the public DCI in step 302.

Specifically, the second type of UE may detect the public message in the resource occupied by the second common message according to the first part of the DCI and the second part of the DCI in the public DCI.

For example, the UE of the second type may determine, according to the first part of the DCI, the end position of the PRB occupied by the first common message in the PDSCH resource, and the location of the next PRB of the end position as the PRB occupied by the second common message in the PDSCH resource. starting point. The second type of UE may detect the second location of the PRB occupied by the second common message in the PDSCH resource and the second downlink resource block allocation field in the second part of the DCI. Class public message.

The second type of UE may further detect the second resource in the resource occupied by the second common message according to the start position of the PRB occupied by the second common message in the PDSCH resource and the second downlink resource block allocation field in the second part of the DCI. The public message of the class, the starting position of the PRB occupied by the second public message in the PDSCH resource may be predefined. For details, refer to step 301.

In addition, the second type of UE may further determine, according to the second PUCCH power control field in the second part of the DCI, the number of PRBs corresponding to the transport block sent by the base station to itself. The modulation mode of the second common message and the index corresponding to the transport block may also be determined according to the MCS field of the first part of the DCI. In addition, the number of bits of the transport block may also be determined according to the MCS field and the second PUCCH power control field. The second type of UE may determine other related scheduling information of the second common message according to the first part of the DCI, and may refer to the prior art. To avoid repetition, details are not described herein again.

It should be understood that the size of the sequence numbers of the above processes does not imply a sequence of executions, and the order of execution of the processes should be determined by its function and internal logic, and should not be construed as limiting the implementation of the embodiments of the present invention. For example, step 303 can be performed in parallel with step 304 or thereafter.

In addition, the public DCI may further include a third portion DCI, and in the case where the third portion DCI is used to indicate that the public DCI indicates two common messages, the above steps 301 to 304 may be performed.

The third portion of the DCI may include reserved bits in the prior art public DCI. For example, the third portion of the DCI may be 1 bit in length. For example, when the value of the third part DCI is set to "0", it may be indicated that the public DCI in step 301 indicates two common messages, that is, the first public message and the second public message, then the base station determines to the first type of UE. When the second type of UE transmits the respective common messages of the two types of UEs, the value of the third part of the DCI may be set to "0".

In the third part, when the value of DCI is "1", it can be predefined as a different meaning according to the actual situation. For example, when the value of the third part of the DCI is "1", it can be said that the public DCI at this time can indicate the first public message, that is, the public DCI at this time is used by the first type of UE. Therefore, when the base station determines to send only the first public message to the first type of UE, the value of the third part of the DCI may be set to "Γ, and the first type of UE detects the first public message according to the public DCI at this time, and the specific process may refer to In the prior art, in order to avoid repetition, details are not described herein. In addition, when the value of the third part DCI is "1", it may also indicate that the common DCI indication at this time is jointly received by the first type UE and the second type UE. a common message. Therefore, when the base station determines to send the same common message to the first type of UE and the second type of UE, the value of the third part of the DCI may be set to "1", and the first type of UE and the second type of UE may be based on The public DCI at this time detects the same public message, and the specific process can refer to the prior art. To avoid repetition, details are not described herein.

6 is a schematic flow chart of a method of transmitting a DCI according to an embodiment of the present invention. The method of Figure 6 is performed by a UE, for example, a first type of UE or a second type of UE.

610. Receive a public DCI scrambled by an identifier, where the common DCI is used to indicate a resource occupied by a public message for the UE in the PDSCH resource. 620. When it is determined that the identifier is an identifier corresponding to the UE, according to the public DCI, detecting a public message of the UE in a resource occupied by the public message.

Specifically, when the first type UE or the second type UE determines that the identifier is an identifier corresponding to its own category, the public message of the UE is detected in the resource occupied by the public message according to the public DCI. That is, when the method is performed by the first type of UE, the first type of UE may detect its own public message according to the public DCI in the resources occupied by the public message. When the method is performed by the second type of UE, the second type of UE may detect its own public message according to the public DCI in the resources occupied by the public message.

It should be understood that, in the embodiment of the present invention, the class of the UE may be a capability class of the UE, that is, may be divided according to the capability of the UE. For example, it can be divided into a first type of UE and a second type of UE. The first type of UE may have a higher receiving capability, and may be referred to as a high-capacity UE, and is capable of receiving downlink data of a full-band bandwidth. The second type of UE has lower receiving capability and can be called a low-capacity UE. It can only receive data in part of the bandwidth and cannot receive data in the full-band bandwidth. The first type of UE and the second type of UE may be further divided according to other attribute information of the UE, which is not limited by the embodiment of the present invention.

Optionally, as an embodiment, when the identifier corresponds to the first type of UE, the identifier may include a System Information-Radio Network Temporary Identifier (SI-RNTI), and a paging wireless network temporary A Paging-Radio Network Temporary Identifier (P-RNTI) or a Random Access Response-Radio Network Temporary Identifier (RAR-RNTI).

Optionally, in another embodiment, when the identifier corresponds to the second type of UE, the identifier may include a second type of System Information-Radio Network Temporary Identifier (SSI-RNTI), Second Paging-Radio Network Temporary Identifier (SP-RNTI) or the second type of random access response-Radio Network Temporary Identifier (SRAR) - RNTI ) „ It should be understood that these identifiers are newly defined identifiers, which are different from the prior art scrambled identifiers, in order to correspond to the names of identifiers of UEs of the class UE corresponding to the first class, such Modifications are also within the scope of embodiments of the invention.

In the embodiment of the present invention, the common DCI for the first type of UE and the public DCI for the second type of UE are respectively scrambled by different identifiers. Therefore, after the first type UE or the second type UE receives the public DCI, when determining When the identifier scrambling the public DCI is an identifier corresponding to its own category, Public DCI detects its own public messages.

In the embodiment of the present invention, since the identifier scrambling the common DCI corresponds to the category of the UE, so that the common DCI can correspond to different classes of UEs, in the case that the base station transmits the public message for different classes of UEs, different categories The UE can detect the corresponding public message according to the respective public DCI, thereby improving the transmission efficiency of the public message.

FIG. 7 is a schematic flow chart of a method of transmitting a DCI according to an embodiment of the present invention. The method of Figure 7 is performed by the base station.

710: Generate a public DCI by the identifier, which corresponds to a category of the UE, where the identifier is used to indicate that the public DCI belongs to the UE, and the common DCI is used to indicate that the UE is in the PDSCH resource. Resources used by public messages.

Optionally, as an embodiment, when the identifier corresponds to the first type of UE, the identifier may include an SI-RNTI, a P-RNTI, or a RAR-RNTI.

Optionally, as another embodiment, when the identifier corresponds to the second type of UE, the identifier may include an SSI-RNTI, an SP-RNTI, or a SRAR-RNTI. It should be understood that these identifiers are newly defined identifiers that differ from prior art scrambled identifiers in order to be associated with an identifier corresponding to the first type of UE.

The name of the identifier of the UE, such modifications are also within the scope of the embodiments of the present invention.

720. Send the public DCI to the UE, and send a public message to the UE in a resource occupied by the public message.

The base station, upon determining to transmit the common message to the first type of UE, may generate a common DCI scrambled by an identifier corresponding to the first type of UE, the common DCI indicating a common message for the first type of UE. When the base station determines to transmit the common message to the second type of UE, the base station may generate a public DCI scrambled by an identifier corresponding to the second type of UE, and the public DCI indicates a public message for the second type of UE. In this way, the first type UE and the second type UE can respectively receive the public DCI corresponding to themselves, and thus respectively according to the public A total of DCI detects its own public messages.

In the embodiment of the present invention, since the identifier for scrambling the common DCI corresponds to the category of the UE, so that the common DCI can correspond to different classes of UEs, the base station can separately transmit the public indicated by the public DCI corresponding to the UEs of different classes. Messages, which can improve the transmission efficiency of public messages.

FIG. 8 is a schematic block diagram of a user equipment according to an embodiment of the present invention. The user equipment 800 of FIG. 8 includes a receiving unit 810 and a detecting unit 820. The receiving unit 810 and the detecting unit 820 may be located in a processor of the user equipment 800.

The receiving unit 810 receives a common DCI from the base station, where the common DCI is used to indicate resources occupied by the first common message for the first type of UE in the PDSCH resource and resources occupied by the second public message for the second type of UE. The detecting unit 820 detects the first public message in the resource occupied by the first public message or the second public message in the resource occupied by the second public message according to the public DCI.

In the embodiment of the present invention, since the common DCI indicates two common messages for two types of UEs, in the case that two common messages are separately transmitted, the two types of UEs can respectively detect respective public messages according to the common DCI, thereby improving The efficiency of public message transmission.

For other functions and operations of the user equipment 800, reference may be made to the process of the UE involved in the method embodiments of FIG. 1 and FIG. 3 above. To avoid repetition, details are not described herein again.

Optionally, as an embodiment, the common DCI may include a first part of the DCI and a second part of the DCI, where the first part of the DCI may include a first downlink resource block allocation field, where the first downlink resource block allocation field is used to indicate the first public The starting position and number of PRBs that the message occupies in the PDSCH resource. The second part DCI may include a second downlink resource block allocation field, where the second downlink resource block allocation field is used to indicate the number of PRBs occupied by the second common message in the PDSCH resource.

Optionally, in another embodiment, when the user equipment 800 is a second type of UE, the detecting unit 820 may determine, according to the first downlink resource block allocation field, an end position of the PRB occupied by the first common message in the PDSCH resource. And the location of the next PRB in the end position is used as the starting position of the PRB occupied by the second common message in the PDSCH resource, according to the starting position of the PRB occupied by the second common message in the PDSCH resource, and the second public message. The number of PRBs occupied in the PDSCH resource, and the second public message is detected in the resource occupied by the second public message.

Optionally, in another embodiment, when the user equipment 800 is the second type of UE, the detecting unit 820 may start the PRB in the PDSCH resource according to the second common message, and the second public The second public message is detected in the resource occupied by the second common message, and the starting position of the PRB occupied by the second public message in the PDSCH resource may be predefined.

Optionally, as another embodiment, the starting position of the PRB occupied by the second common message on the PDSCH resource may be indicated by system information or RRC signaling, or may be a fixed position in the PDSCH resource, or may be The second type of UE is at the beginning of the dedicated subband in the PDSCH resource, or may be a fixed frequency domain offset from the starting position of the dedicated subband.

Optionally, as another embodiment, the foregoing second part DCI may be dedicated by the second type of UE. Optionally, as another embodiment, the public DCI may further include a third part DCI, where the third part DCI may be used to indicate that the public DCI indicates two common messages.

9 is a schematic block diagram of a base station in accordance with an embodiment of the present invention. The base station 900 of FIG. 9 includes a generating unit 910 and a transmitting unit 920. Generating unit 910 and transmitting unit 920 may be located specifically within a processor of base station 900.

The generating unit 910 generates a common DCI, which is used to indicate, in the PDSCH resource, resources occupied by the first common message for the first type of UE and resources occupied by the second common message for the second type of UE. The sending unit 920 sends the common DCI to the first type of UE and the second type of UE, and sends the first public message to the first type of UE or the resource occupied by the second public message in the resource occupied by the first public message. Sending a second public message to the second type of UE.

For other functions and operations of the base station 900, reference may be made to the procedures related to the base station in the method embodiments of FIG. 2 and FIG. 3 above. To avoid repetition, details are not described herein again.

Optionally, as an embodiment, the common DCI may include a first part of the DCI and a second part of the DCI, where the first part of the DCI may include a first downlink resource block allocation field, where the first downlink resource block allocation field is used to indicate the first public The starting position and number of PRBs that the message occupies in the PDSCH resource. The second part of the DCI may include a second downlink resource block allocation field, and a second downlink resource block allocation field The number of PRBs used to indicate that the second common message is occupied in the PDSCH resource.

Optionally, as another embodiment, the foregoing second part DCI may be dedicated to the second type of UE. Optionally, as another embodiment, the public DCI may further include a third part, the DCI, and the third part.

The DCI is used to indicate that the public DCI indicates two common messages.

FIG. 10 is a schematic block diagram of a user equipment according to an embodiment of the present invention. The user equipment 1000 of FIG. 10 includes a receiving unit 1010 and a detecting unit 1020. The receiving unit 1010 and the detecting unit 1020 may be located in a processor of the user equipment 1000.

The receiving unit 1010 receives the public DCI scrambled by the identifier, the common DCI being used to indicate the resources occupied by the public message for the UE in the PDSCH resource. When the detecting unit 1020 determines that the identifier is an identifier corresponding to the UE, the public message of the UE is detected in the resource occupied by the common message according to the public DCI.

For other functions and operations of the user equipment 1000, reference may be made to the process involving the UE in the method embodiment of FIG. 6 above. To avoid repetition, details are not described herein again.

Optionally, as an embodiment, when the identifier corresponds to the first type of UE, the identifier may include an SI-RNTL P-RNTI or a RAR-RNTI. Or when the identifier corresponds to the second type of UE, the identifier may include SSI-RNTI, SP-RNTI or SRAR-RNTI.

11 is a schematic block diagram of a base station according to an embodiment of the present invention. The base station 1100 of Fig. 11 includes a generating unit 1110 and a transmitting unit 1120. The generating unit 1110 and the transmitting unit 1120 may be specifically located in a processor of the base station 1100.

A generating unit 1110 generates the common DCI scrambling identifier, the identifier corresponding to another UE class ¹ J, the identifier for indicating the UE belongs to the common DCI, DCI is used to indicate the common resources directed to the PDSCH The resources occupied by the UE's public messages. The sending unit 1120 sends the public DCI to the UE, and the resource occupied by the public message sends a public message to the UE. In the embodiment of the present invention, since the identifier for scrambling the common DCI corresponds to the category of the UE, so that the common DCI can correspond to different classes of UEs, the base station can separately transmit the public indicated by the public DCI corresponding to the UEs of different classes. Messages, which can improve the transmission efficiency of public messages.

For other functions and operations of the base station 1100, reference may be made to the process involving the base station in the method embodiment of FIG. 7 above. To avoid repetition, details are not described herein again.

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 or a combination of computer software and electronic hardware. 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 brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, 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 mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form. The components displayed by the unit may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment. 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 two or more units may be integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including The instructions are used 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 U disk, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program codes. .

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims

Rights request

A method for transmitting downlink control information, comprising:

Receiving a common downlink control information DCI from the base station, where the common DCI is used to indicate a resource occupied by the first common message for the first type of user equipment UE in the physical downlink shared channel PDSCH resource and a second public for the second type of UE The resources occupied by the message;

And detecting, according to the public DCI, the first public message in a resource occupied by the first public message or detecting the second public message in a resource occupied by the second public message.

The method according to claim 1, wherein the common DCI includes a first partial DCI and a second partial DCI, the first partial DCI includes a first downlink resource block allocation field, and the first downlink The resource block allocation field is used to indicate a starting position and a number of PRBs occupied by the first common message in the PDSCH resource,

The second part of the DCI includes a second downlink resource block allocation field, where the second downlink resource block allocation field is used to indicate the number of physical resource blocks PRB occupied by the second common message in the PDSCH resource.

The method according to claim 2, wherein, when the method is performed by the second type of UE, the detecting, according to the public DCI, detecting a resource occupied by the second public message The second public message, including:

Determining, according to the first downlink resource block allocation field, an end position of a PRB occupied by the first common message in the PDSCH resource, and using a location of a next PRB of the end location as the second public The starting position of the PRB occupied by the message in the PDSCH resource;

And detecting, according to the starting position of the PRB occupied by the second common message in the PDSCH resource and the number of PRBs occupied by the second common message in the PDSCH resource, in the resource occupied by the second public message Second public message.

4. The method according to claim 2, wherein when the method is executed by the second type of UE,

And detecting, according to the public DCI, the second public message in the resource occupied by the second public message, including:

And a resource occupied by the second public message according to a starting position of a PRB occupied by the second common message in the PDSCH resource and a number of PRBs occupied by the second common message in the PDSCH resource Detecting the second public message, the second public message is in the The starting position of the PRB occupied in the PDSCH resource is predefined.

The method according to claim 4, wherein the starting position of the PRB occupied by the second common message in the PDSCH resource is indicated by system information or radio resource control RRC signaling, or A fixed position in the PDSCH resource, or a starting position of the dedicated subband of the second type of UE in the PDSCH resource, or a fixed frequency domain offset from a starting position of the dedicated subband s position.

The method according to any one of claims 2 to 5, characterized in that the second part DCI is dedicated by the second type of UE.

The method according to any one of claims 1 to 6, wherein the common DCI further comprises a third part DCI, the third part DCI is used to indicate that the public DCI indicates two public messages. .

A method for transmitting downlink control information, comprising:

Generating a common downlink control information DCI, where the common DCI is used to indicate a resource occupied by a first common message for a first type of user equipment UE in a physical downlink shared channel PDSCH resource and a second public message for a second type of UE Occupied resources;

Transmitting the common DCI to the first type of UE and the second type of UE, and transmitting the first public message to the first type of UE in the resource occupied by the first public message or in the The second public message is sent to the second type of UE in the resource occupied by the second public message.

The method according to claim 8, wherein the common DCI includes a first partial DCI and a second partial DCI, where the first partial DCI includes a first downlink resource block allocation field, and the first downlink The resource block allocation field is used to indicate a starting position and a number of PRBs occupied by the first common message in the PDSCH resource; the second part of the DCI includes a second downlink resource block allocation field, and the second downlink resource The block allocation field is used to indicate the number of physical resource blocks PRB occupied by the second common message in the PDSCH resource.

10. The method according to claim 9, wherein the first public message is in the

The position of the next PRB at the end position of the PRB occupied in the PDSCH resource is the start position of the PRB occupied by the second public message in the PDSCH resource;

The starting position of the PRB occupied by the second common message in the PDSCH resource is predefined, where the starting position of the PRB occupied by the second common message in the PDSCH resource is determined by system information or wireless Indicated by the resource control RRC signaling, or fixed in the PDSCH resource. The location is either the starting location of the dedicated subband of the second type of UE in the PDSCH resource, or the location of the fixed frequency domain offset from the starting location of the dedicated subband.

The method according to claim 9 or 10, wherein the second part DCI is dedicated by the second type of UE.

The method according to any one of claims 8 to 11, wherein the public

The DCI also includes a third portion DCI for indicating that the public DCI indicates two common messages.

A method for transmitting downlink control information, comprising:

Receiving a common downlink control information DCI scrambled by the identifier, the common DCI being used to indicate a resource occupied by a public message for the user equipment UE in the physical downlink shared channel PDSCH resource;

When it is determined that the identifier is an identifier corresponding to the UE, detecting, according to the public DCI, a public message of the UE in a resource occupied by the common message.

The method according to claim 13, wherein when the identifier corresponds to a first type of UE, the identifier comprises a system message radio network temporary identifier SI-RNTI, a paging radio network temporary identifier P-RNTI or random access response radio network temporary identifier RAR-RNTI; or,

When the identifier corresponds to the second type of UE, the identifier includes a second type of system message radio network temporary identifier SSI-RNTI, a second type of paging radio network temporary identifier SP-RNTI or a second type of random The access response radio network temporary identifier SRAR-RNTI.

A method for transmitting downlink control information, comprising:

Generating a common downlink control information DCI scrambled by an identifier, the identifier corresponding to a category of the user equipment UE, the identifier being used to indicate that the public DCI belongs to the UE, and the public DCI is used to indicate that the physical a resource occupied by a common message for the UE in a downlink shared channel PDSCH resource;

Transmitting the public DCI to the UE, and transmitting the public message to the UE in a resource occupied by the common message.

16. The method according to claim 15, wherein when the identifier corresponds to a first type of UE, the identifier comprises a system message radio network temporary identifier SI-RNTI, a paging radio network temporary identifier P-RNTI or random access response radio network temporary identifier RAR-RNTI; or,

17. A user equipment, comprising:

a receiving unit, configured to receive a common downlink control information (DCI) from the base station, where the common DCI is used to indicate resources occupied by the first public message for the first type of user equipment UE in the physical downlink shared channel PDSCH resource, and for the second type The resources occupied by the second public message of the UE;

a detecting unit, configured to detect, according to the public DCI, the first public message in a resource occupied by the first public message or detect the second public message in a resource occupied by the second public message .

The user equipment according to claim 17, wherein the common DCI includes a first partial DCI and a second partial DCI, and the first partial DCI includes a first downlink resource block allocation field, where the first downlink a row resource block allocation field, configured to indicate a starting location and a number of PRBs occupied by the first common message in the PDSCH resource;

The user equipment according to claim 18, wherein, when the user equipment is the second type of UE,

The detecting unit is specifically configured to determine, according to the first downlink resource block allocation field, an end position of a PRB occupied by the first common message in the PDSCH resource, and the next PRB of the end position a location as a start position of the PRB occupied by the second common message in the PDSCH resource; a start position of the PRB occupied in the PDSCH resource according to the second common message, and the second public message is occupied in the PDSCH resource The number of PRBs is detected in the resources occupied by the second public message.

The detecting unit is specifically configured to: according to the starting position of the PRB occupied by the second common message in the PDSCH resource, and the PRB occupied by the second common message in the PDSCH resource The second public message is detected in the resource occupied by the second public message, and the starting position of the PRB occupied by the second public message in the PDSCH resource is predefined.

The user equipment according to claim 20, wherein the starting position of the PRB occupied by the second common message in the PDSCH resource is indicated by system information or radio resource control RRC signaling, or Is a fixed position in the PDSCH resource, or a starting position of the dedicated subband of the second type of UE in the PDSCH resource, or a fixed frequency domain offset from a starting position of the dedicated subband The location of the move.

The user equipment according to any one of claims 18 to 21, wherein the second part DCI is dedicated by the second type of UE.

The user equipment according to any one of claims 17 to 22, wherein the public DCI further comprises a third part DCI, wherein the third part DCI is used to indicate that the public DCI indicates two public Message.

24. A base station, comprising:

a generating unit, configured to generate a common downlink control information DCI, where the common DCI is used to indicate, in the physical downlink shared channel PDSCH resource, resources occupied by the first common message for the first type of user equipment UE and for the second type of UE The resources occupied by the second public message;

a sending unit, configured to send the public DCI to the first type of UE and the second type of UE, and send the first public message to a first type of UE in a resource occupied by the first public message Or sending the second public message to the second type of UE in the resource occupied by the second public message.

The base station according to claim 24, wherein the common DCI includes a first partial DCI and a second partial DCI, the first partial DCI includes a first downlink resource block allocation field, and the first downlink The resource block allocation field is used to indicate a starting position and a number of PRBs occupied by the first common message in the PDSCH resource; the second part of the DCI includes a second downlink resource block allocation field, and the second downlink resource The block allocation field is used to indicate the number of physical resource blocks PRB occupied by the second common message in the PDSCH resource.

The base station according to claim 25, wherein the location of the next PRB of the end position of the PRB occupied by the first common message in the PDSCH resource is the second common message in the PDSCH resource The starting position of the occupied PRB; or

The starting position of the PRB occupied by the second common message in the PDSCH resource is predefined, where a starting position of the PRB occupied by the second common message in the PDSCH resource is Indicated by the system information or the radio resource control RRC signaling, or a fixed position in the PDSCH resource, or a starting position of the dedicated subband of the second type of UE in the PDSCH resource, or The starting position of the dedicated sub-band is offset from the fixed frequency domain.

The base station according to claim 25 or 26, wherein the second part DCI is dedicated by the second type of UE.

The base station according to any one of claims 24 to 27, wherein the common DCI further comprises a third part DCI, wherein the third part DCI is used to indicate that the public DCI indicates two public messages. .

29. A user equipment, comprising:

a receiving unit, configured to receive public downlink control information DCI scrambled by the identifier, where the public

The DCI is used to indicate resources occupied by the public message for the user equipment UE in the physical downlink shared channel PDSCH resource;

And a detecting unit, configured to: when determining that the identifier is an identifier corresponding to the UE, detect, according to the public DCI, a public message of the UE in a resource occupied by the public message.

30. The user equipment according to claim 29, wherein when the identifier corresponds to a first type of UE, the identifier comprises a system message radio network temporary identifier SI-RNTI, a paging radio network temporary An identifier P-RNTI or a random access response radio network temporary identifier RAR-RNTI; or, when the identifier corresponds to a second type of UE, the identifier includes a second type of system message radio network temporary identifier SSI - RNTI, a second type of paging radio network temporary identifier SP-RNTI or a second type of random access response radio network temporary identifier SRAR-RNTI.

31. A base station, comprising:

a generating unit, configured to generate a common downlink control information DCI scrambled by the identifier, where the identifier corresponds to a category of the user equipment UE, the identifier is used to indicate that the public DCI belongs to the UE, and the public DCI Means for indicating resources occupied by a common message for the UE in a physical downlink shared channel PDSCH resource;

And a sending unit, configured to send the public DCI to the UE, and send the public message to the UE in a resource occupied by the common message.

The base station according to claim 31, wherein when the identifier corresponds to a first type of UE, the identifier includes a system message radio network temporary identifier SI-RNTI, and paging is absent a line network temporary identifier P-RNTI or a random access response radio network temporary identifier RAR-RNTI; or, when the identifier corresponds to a second type of UE, the identifier includes a second type of system message wireless network temporary Identifier SSI-RNTI, second type paging radio network temporary identifier SP-RNTI or second type random access response radio network temporary identifier SRAR-RNTI.