CN111066355A

CN111066355A - Communication method and device

Info

Publication number: CN111066355A
Application number: CN201780093822.0A
Authority: CN
Inventors: 余政; 刘江华; 程型清
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2017-08-31
Filing date: 2017-08-31
Publication date: 2020-04-24
Also published as: WO2019041261A1

Abstract

A communication method and a device are used for providing a new communication mode and supporting flexible deployment. One of the communication methods comprises: the network equipment sends a synchronization channel and a broadcast channel to the first terminal equipment and the second terminal equipment in the N resource blocks; n is a positive integer greater than 0; and the frequency resources corresponding to the N resource blocks are less than or equal to the maximum channel bandwidth of the second terminal equipment, and the maximum channel bandwidth of the second terminal equipment is less than the maximum channel bandwidth of the first terminal equipment.

Description

Communication method and device

Technical Field

The embodiment of the application relates to the technical field of mobile communication, in particular to a communication method and equipment.

Background

The existing machine-type communications (MTC) communication technology requires a system bandwidth to have at least 6 Resource Blocks (RBs). For example, the base station needs to transmit a synchronization channel and the like to the terminal device through 6 RBs. Therefore, the terminal device supporting MTC can support communication with the base station over more RBs, and such terminal device can support voice, mobility, and medium-high rate transmission well.

However, this communication technique occupies more RBs, which is not favorable for flexible deployment.

Disclosure of Invention

The embodiment of the application provides a communication method and equipment, which are used for providing a new communication mode and supporting flexible deployment.

In a first aspect, a communication method is provided, which may be performed by a network device, such as a base station. The method comprises the following steps: the network equipment sends a synchronization channel and a broadcast channel to the first terminal equipment and the second terminal equipment in the N resource blocks; n is a positive integer greater than 0; and the frequency resources occupied by the N resource blocks are less than or equal to the maximum channel bandwidth of the second terminal equipment, and the maximum channel bandwidth of the second terminal equipment is less than the maximum channel bandwidth of the first terminal equipment.

In a second aspect, a communication method is provided, which may be performed by a terminal device. The method comprises the following steps: the terminal equipment receives a synchronous channel and a broadcast channel from the network equipment in N resource blocks; wherein N is a positive integer greater than 0; the frequency resources occupied by the N resource blocks are less than or equal to the maximum channel bandwidth of the second terminal device served by the network device, and the maximum channel bandwidth of the second terminal device is less than the maximum channel bandwidth of the terminal device.

In this embodiment, the network device may send the synchronization channel and the broadcast channel in N resource blocks, and both the first terminal device and the second terminal device may receive the synchronization channel and the broadcast channel in the N resource blocks, where a maximum channel bandwidth of the first terminal device is greater than a maximum channel bandwidth of the second terminal device. For a first terminal device of this type, it may perform cell access in less than 6 RBs, so that it may support information transmission with a network device in fewer resource blocks, and thus the communication system provided in this embodiment of the present application obviously can support more flexible deployment.

In one possible design, the network device may send system information to the first terminal device on K resource blocks, where K is a positive integer greater than 0 and K is greater than or equal to N; and when K is greater than 1, the system information carried in each resource block of the K resource blocks by the network equipment is self-decoded information. Correspondingly, the terminal device receives system information from the network device on K resource blocks, where K is a positive integer greater than 0 and is greater than or equal to N; and when K is greater than 1, the system information carried in each resource block of the K resource blocks by the network equipment is self-decoded information.

When sending the system information, the network device may send the system information on K RBs that are greater than or equal to N, that is, K may be greater than N or equal to N, for example, K may be greater than N when the channel quality is good, transmission quality is improved by transmitting more RBs, and K may be equal to N when the channel quality is poor, which ensures that transmission is successful as much as possible, and is helpful to save resources and flexible deployment. In addition, if K is greater than 1, the system information sent by the network device in each of the K RBs can be self-decoded information without depending on other system information for decoding, so that even if the terminal device does not completely receive the system information of the K RBs, the received system information can be decoded, and the decoding success rate of the terminal device is increased.

In one possible design, the network device sends indication information to the first terminal device through the broadcast channel, where the indication information is used to indicate the number K of resource blocks occupied by the system information. Correspondingly, the terminal device receives indication information from the network device through the broadcast channel, wherein the indication information is used for indicating the number K of resource blocks occupied by the system information.

That is, the network device may notify the number K to the first terminal device, so that the terminal device can correctly receive the system information, and the reception success rate is improved.

In one possible design, the network device receives a random access channel from the first terminal device on a first frequency resource, where the first frequency resource includes a number of resource blocks greater than N; the network equipment sends a first physical downlink control channel to the first terminal equipment, wherein the first physical downlink control channel is used for scheduling a first physical downlink shared channel; and the network equipment sends a random access response or a competition resolving message to the first terminal equipment through the first physical downlink shared channel. Correspondingly, the terminal device sends a random access channel to the network device on a first frequency resource, wherein the number of resource blocks included in the first frequency resource is greater than N; the terminal equipment receives a first physical downlink control channel from the network equipment, wherein the first physical downlink control channel is used for scheduling a first physical downlink shared channel; and the terminal equipment receives a random access response or a competition resolving message from the network equipment through the first physical downlink shared channel.

The number of RBs occupied by the first physical downlink control channel is greater than the number of RBs occupied by the second physical downlink control channel, and the number of RBs occupied by the first physical downlink shared channel is greater than the number of RBs occupied by the second physical downlink shared channel, that is, the first physical downlink control channel and the first physical downlink shared channel are both channels with larger bandwidth. If the first terminal device sends the random access channel to the network device on the first frequency resource, it indicates that the maximum channel bandwidth of the first terminal device may be larger, and the network device may select to schedule a channel with a larger bandwidth, that is, the first physical downlink control channel and the first physical downlink shared channel, for the first terminal device, so that richer information can be transmitted, and reliability and transmission quality of information transmission are improved.

In one possible design, the network device receives a random access channel from the second terminal device on a second frequency resource, where the second frequency resource includes a number of resource blocks that is less than or equal to N; the network equipment sends a second physical downlink control channel to the second terminal equipment, and the second physical downlink control channel is used for scheduling a second physical downlink shared channel; and the network equipment sends a random access response or a competition resolving message to the second terminal equipment through the second physical downlink shared channel.

If the second terminal device sends the random access channel to the network device on the second frequency resource, it indicates that the maximum channel bandwidth of the second terminal device may be smaller, and if the network device schedules a channel with a larger bandwidth for the second terminal device, the second terminal device may not receive normally. Therefore, the network device can select a channel with a smaller scheduling bandwidth for the second terminal device, that is, the second physical downlink control channel and the second physical downlink shared channel, so that the transmission success rate can be improved, and flexible deployment is facilitated.

In one possible design, the network device receives a random access channel from the first terminal device on a third frequency resource, where the third frequency resource includes a number of resource blocks that is less than or equal to N; the network equipment sends a second physical downlink control channel to the first terminal equipment, and the second physical downlink control channel is used for scheduling a second physical downlink shared channel; and the network equipment sends a random access response or a contention resolution message to the first terminal equipment through the second physical downlink shared channel. Correspondingly, the terminal device sends a random access channel to the network device on a third frequency resource, wherein the number of resource blocks contained in the third frequency resource is less than or equal to N; the terminal equipment receives a second physical downlink control channel from the network equipment, and the second physical downlink control channel is used for scheduling a second physical downlink shared channel; and the terminal equipment receives a random access response or a competition resolving message from the network equipment through the second physical downlink shared channel.

In this design, even if the maximum channel bandwidth of the first terminal device is greater than the maximum channel bandwidth of the second terminal device, the first terminal device may also send the random access channel to the network device on fewer frequency resources, and then the network device may also schedule a channel with a smaller bandwidth for the first terminal device, that is, a second physical downlink control channel and a second physical downlink shared channel.

In one possible design, the network device indicates, through a random access response, that the message 3 of the first terminal device is transmitted through a first physical uplink shared channel or through a second physical uplink shared channel; or, the network device indicates, through a physical downlink control channel, that the message 3 of the first terminal device is transmitted through a first physical uplink shared channel or transmitted through a second physical uplink shared channel, where the physical downlink control channel is a control channel for scheduling a random access response or a control channel for scheduling a retransmission message 3. Correspondingly, the terminal device receives a random access response sent by the network device, where the random access response indicates that the message 3 of the terminal device is transmitted through a first physical uplink shared channel or a second physical uplink shared channel; or, the terminal device receives a physical downlink control channel from the network device, where the physical downlink shared channel indicates that the message 3 of the terminal device is transmitted through a first physical uplink shared channel or transmitted through a second physical uplink shared channel, where the physical downlink control channel is a control channel for scheduling a random access response or a control channel for scheduling a retransmission message 3.

For the Msg3, the Msg3 can be transmitted through different shared channels, and different shared channels can be selected according to actual conditions, so that the Msg3 is flexible. If the shared channel with larger bandwidth is selected, the transmission reliability is improved, and if the shared channel with smaller bandwidth is selected, the transmission success rate is improved. The network device may indicate which shared channel the Msg3 uses for transmission, and in this embodiment, the network device may indicate in different manners, which is flexible.

In one possible design, the network device indicates, through a random access response, that a contention resolution message sent to the first terminal device is transmitted through a first physical downlink shared channel or through a second physical downlink shared channel; or, the network device indicates, through a physical downlink control channel, that a contention resolution message sent to the first terminal device is transmitted through a first physical downlink shared channel or through a second physical downlink shared channel, where the physical downlink control channel is a control channel for scheduling a random access response or a control channel for scheduling a contention resolution message; or, the network device indicates, to the first terminal device through a random access response, that the physical downlink control channel of the scheduling contention resolution message is the first physical downlink control channel or the second physical downlink control channel. Correspondingly, the terminal device receives a random access response from the network device, where the random access response indicates that a contention resolution message sent to the terminal device is transmitted through a first physical downlink shared channel or a second physical downlink shared channel; or, the terminal device receives a physical downlink control channel from the network device, where the physical downlink control channel indicates that a contention resolution message sent to the terminal device is transmitted through a first physical downlink shared channel or a second physical downlink shared channel, where the physical downlink control channel is a control channel for scheduling a random access response or a control channel for scheduling a contention resolution message; or, the terminal device receives a random access response from the network device, where the random access response indicates to the terminal device that the physical downlink control channel of the scheduling contention resolution message is the first physical downlink control channel or the second physical downlink control channel.

For the Msg4, the Msg4 can be transmitted through different shared channels, and different shared channels can be selected according to actual conditions, so that the Msg4 is flexible. If the shared channel with larger bandwidth is selected, the transmission reliability is improved, and if the shared channel with smaller bandwidth is selected, the transmission success rate is improved. The network device may indicate which shared channel the Msg4 uses for transmission, and in this embodiment, the network device may indicate in different manners, which is flexible.

In one possible design, the network device determines a coverage enhancement level or a coverage enhancement mode of the first terminal device; when the coverage enhancement level of the first terminal device is a first coverage enhancement level or the coverage enhancement mode of the first terminal device is a first coverage enhancement mode, the network device sends a first physical downlink control channel to the first terminal device; and when the coverage enhancement grade of the first terminal equipment is a second coverage enhancement grade or the coverage enhancement mode of the first terminal equipment is a second coverage enhancement mode, the network equipment sends a second physical downlink control channel to the first terminal equipment. Correspondingly, when the coverage enhancement level of the terminal device is a first coverage enhancement level or the coverage enhancement mode of the terminal device is a first coverage enhancement mode, the terminal device receives a first physical downlink control channel from a network device; and when the coverage enhancement grade of the terminal equipment is a second coverage enhancement grade or the coverage enhancement mode of the terminal equipment is a second coverage enhancement mode, the terminal equipment receives a second physical downlink control channel from the network equipment.

In the embodiment of the present application, the network device may determine how to schedule according to the coverage enhancement mode or the coverage enhancement level of the first terminal device, for example, the higher the coverage enhancement level of the first terminal device is, the worse the channel quality is, the network device may send a channel occupying fewer RBs to the terminal device, so as to ensure that the terminal device can successfully receive the channel as much as possible, and save resources as much as possible; and the lower the coverage enhancement level is, the better the channel quality is, the network device can send the channel occupying more RBs to the terminal device, so as to improve the transmission reliability and the transmission quality.

In one possible design, the network device allocates H resource blocks for uplink data transmission of the first terminal device; when H is larger than a first threshold, the network equipment receives uplink data from the first terminal equipment through a first physical uplink shared channel; and when the H is smaller than or equal to the first threshold, the network equipment receives uplink data from the first terminal equipment through a second physical uplink shared channel. Correspondingly, the terminal equipment determines that the network equipment allocates H resource blocks for uplink data transmission of the terminal equipment; when H is larger than a first threshold, the terminal equipment sends uplink data to the network equipment through a first physical uplink shared channel; and when the H is smaller than or equal to the first threshold, the terminal equipment sends and sends uplink data to the network equipment through a second physical uplink shared channel. And H is a positive integer.

If the number of RBs scheduled by the network device for the first terminal device is large, the first terminal device may send uplink data to the network device through the first physical uplink shared channel that occupies a large number of RBs, so that a large amount of uplink data can be sent, which is beneficial to supporting voice, mobility, and medium-high rate transmission well. And if the number of RBs scheduled by the network device for the first terminal device is small, the first terminal device can send uplink data to the network device through a second physical uplink shared channel occupying less RBs, so that the success rate of uplink data transmission is improved, and transmission resources are saved.

In one possible design, the network device determines a coverage enhancement level or a coverage enhancement mode of the first terminal device; when the coverage enhancement grade of the first terminal equipment is a first coverage enhancement grade or the coverage enhancement mode of the first terminal equipment is a first coverage enhancement mode, the network equipment schedules the first terminal equipment to adopt a first physical uplink shared channel for uplink data transmission; and when the coverage enhancement grade of the first terminal equipment is a second coverage enhancement grade or the coverage enhancement mode of the first terminal equipment is a second coverage enhancement mode, the network equipment schedules the first terminal equipment to adopt a second physical uplink shared channel for uplink data transmission. Correspondingly, when the coverage enhancement level of the terminal device is a first coverage enhancement level or the coverage enhancement mode of the terminal device is a first coverage enhancement mode, the terminal device adopts a first physical uplink shared channel to perform uplink data transmission; and when the coverage enhancement grade of the terminal equipment is a second coverage enhancement grade or the coverage enhancement mode of the terminal equipment is a second coverage enhancement mode, the terminal equipment adopts a second physical uplink shared channel to carry out uplink data transmission.

For example, the higher the coverage enhancement level of the first terminal device is, the worse the channel quality is, the network device may schedule the terminal device to transmit uplink data by using a channel occupying fewer RBs, so as to ensure that the terminal device can successfully transmit, and save resources as much as possible; and the lower the coverage enhancement level is, the better the channel quality is, the network equipment can schedule the terminal equipment to adopt the channel occupying more RBs to transmit the uplink data, so as to improve the transmission reliability of the uplink data and the transmission quality.

In one possible design, the network device determines a coverage enhancement level or a coverage enhancement mode of the first terminal device; when the coverage enhancement level of the first terminal device is a first coverage enhancement level or the coverage enhancement mode of the first terminal device is a first coverage enhancement mode, the network device performs downlink data transmission to the first terminal device by adopting a first physical downlink shared channel; and when the coverage enhancement grade of the first terminal equipment is a second coverage enhancement grade or the coverage enhancement mode of the first terminal equipment is a second coverage enhancement mode, the network equipment performs downlink data transmission to the first terminal equipment by adopting a second physical downlink shared channel. Correspondingly, when the coverage enhancement level of the terminal device is a first coverage enhancement level or the coverage enhancement mode of the terminal device is a first coverage enhancement mode, the terminal device receives downlink data from a network device through a first physical downlink shared channel; and when the coverage enhancement grade of the terminal equipment is a second coverage enhancement grade or the coverage enhancement mode of the terminal equipment is a second coverage enhancement mode, the terminal equipment receives downlink data from network equipment through a second physical downlink shared channel.

For example, the higher the coverage enhancement level of the first terminal device is, the worse the channel quality is, the network device may adopt a channel occupying fewer RBs to transmit downlink data, so as to ensure that the terminal device can successfully receive the downlink data as much as possible and save resources as much as possible; and the lower the coverage enhancement level is, the better the channel quality is, the network equipment can adopt the channel occupying more RBs to transmit the downlink data so as to improve the transmission reliability of the downlink data and the transmission quality.

In a third aspect, a network device is provided. The network equipment has the function of realizing the network equipment designed by the method. These functions may be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more units corresponding to the above functions.

In one possible design, the specific structure of the network device may include a transceiver. Optionally, the network device may further include a processor. The transceiver and the processor may perform the respective functions in the method provided by the first aspect or any one of the possible designs of the first aspect.

In a third aspect, a terminal device is provided. The terminal equipment has the function of realizing the first terminal equipment in the method design. These functions may be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more units corresponding to the above functions.

In one possible design, the specific structure of the terminal device may include a transceiver. Optionally, the terminal device may further include a processor. The transceiver and the processor may perform the respective functions in the method provided by the second aspect or any one of the possible designs of the second aspect.

In a fifth aspect, a network device is provided. The network equipment has the function of realizing the network equipment designed by the method. These functions may be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more units corresponding to the above functions.

In one possible design, the specific structure of the network device may include a transceiver unit. Optionally, the network device may further include a processing unit. The transceiver unit and the processing unit may perform the corresponding functions in the method provided by the first aspect or any one of the possible designs of the first aspect.

In a sixth aspect, a terminal device is provided. The terminal equipment has the function of realizing the first terminal equipment in the method design. These functions may be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more units corresponding to the above functions.

In one possible design, the specific structure of the terminal device may include a transceiver unit. Optionally, the terminal device may further include a processing unit. The transceiver unit and the processing unit may perform the respective functions in the method provided by the second aspect or any one of the possible designs of the second aspect.

A seventh aspect provides a communication apparatus, which may be a network device or a chip in the network device. The communication device has the functionality provided in implementing the first aspect or any one of the possible designs of the first aspect. The function can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In one possible design, when the communication device is a network device, the network device includes: a processing unit, which may be for example a processor, and a communication unit, which may be for example a transceiver comprising radio frequency circuitry, optionally the network device further comprises a storage unit, which may be for example a memory. When the network device includes a storage unit, the storage unit is configured to store computer-executable instructions, the processing unit is connected to the storage unit, and the processing unit executes the computer-executable instructions stored in the storage unit, so that the network device executes the communication method in the first aspect or any one of the possible designs of the first aspect.

In another possible design, when the communication device is a chip in a network device, the chip includes: a processing unit, which may be for example a processor, and a communication unit, which may be for example an input/output interface, a pin or a circuit, etc. The processing unit may execute the computer executable instructions stored by the storage unit to cause a chip within the network device to perform the communication method of any one of the first aspect or the first aspect. Optionally, the storage unit is a storage unit in the chip, such as a register, a cache, and the like, and the storage unit may also be a storage unit located outside the chip in the network device, such as a ROM or another type of static storage device that can store static information and instructions, a RAM, and the like.

The processor mentioned in any of the above may be a general purpose CPU, a microprocessor, an ASIC, or one or more integrated circuits for controlling the execution of the program of the communication method in any of the above possible designs of the first aspect or the first aspect.

In an eighth aspect, a communication apparatus is provided, which may be a terminal device or a chip in the terminal device, and the terminal device may implement the functions of the first terminal device as described above. The communication device has the functionality provided in implementing the second aspect or any one of the possible designs of the second aspect. The function can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In one possible design, when the communication device is a terminal device, the terminal device includes: a processing unit, which may be for example a processor, and a communication unit, which may be for example a transceiver comprising radio frequency circuitry, optionally the terminal device further comprises a storage unit, which may be for example a memory. When the terminal device includes a storage unit, the storage unit is configured to store computer-executable instructions, the processing unit is connected to the storage unit, and the processing unit executes the computer-executable instructions stored in the storage unit, so that the terminal device executes the communication method in any one of the possible designs of the second aspect or the second aspect.

In another possible design, when the communication device is a chip in a terminal device, the chip includes: a processing unit, which may be for example a processor, and a communication unit, which may be for example an input/output interface, a pin or a circuit, etc. The processing unit may execute the computer executable instructions stored by the storage unit to cause the chip in the terminal device to perform the communication method of any one of the first aspect or the first aspect. Optionally, the storage unit is a storage unit in the chip, such as a register, a cache, and the like, and the storage unit may also be a storage unit located outside the chip in the terminal device, such as a ROM or another type of static storage device that can store static information and instructions, a RAM, and the like.

The processor referred to in any of the above may be a general purpose CPU, microprocessor, ASIC, or one or more integrated circuits for controlling the execution of the program of the communication method according to any of the possible designs of the second aspect or the second aspect.

In a ninth aspect, a communication system is provided that may include a network device, a first terminal device, and a second terminal device. The network equipment is used for sending a synchronization channel and a broadcast channel to the first terminal equipment and the second terminal equipment in the N resource blocks; the first terminal equipment is used for receiving a synchronization channel and a broadcast channel sent by the network equipment in N resource blocks; the second terminal equipment is used for receiving the synchronous channel and the broadcast channel sent by the network equipment in the N resource blocks; wherein N is a positive integer greater than 0; and the frequency resources corresponding to the N resource blocks are less than or equal to the maximum channel bandwidth of the second terminal device served by the network device, and the maximum channel bandwidth of the second terminal device is less than the maximum channel bandwidth of the terminal device.

A tenth aspect provides a computer storage medium having stored therein instructions that, when executed on a computer, cause the computer to perform the method of the first aspect or any one of the possible designs of the first aspect.

In an eleventh aspect, there is provided a computer storage medium having instructions stored thereon, which when run on a computer, cause the computer to perform the method as set forth in the second aspect or any one of the possible designs of the second aspect.

In a twelfth aspect, there is provided a computer program product comprising instructions stored thereon, which when run on a computer, cause the computer to perform the method of the first aspect or any one of the possible designs of the first aspect.

In a thirteenth aspect, there is provided a computer program product comprising instructions stored thereon, which when run on a computer, cause the computer to perform the method of the second aspect described above or any one of the possible designs of the second aspect.

In the embodiment of the present application, for a first terminal device of this type, it may perform cell access in less than 6 RBs, so that it may support information transmission with a network device in fewer resource blocks, and thus the communication system provided in the embodiment of the present application may obviously support more flexible deployment.

Drawings

Fig. 1 is a schematic view of an application scenario according to an embodiment of the present application;

fig. 2 is a flowchart of a communication method according to an embodiment of the present application;

FIG. 3 is a schematic diagram illustrating a position relationship of a plurality of RBs according to an embodiment of the present application;

FIG. 4 is a schematic diagram illustrating a position relationship of a plurality of RBs provided by an embodiment of the present application;

FIG. 5 is a schematic diagram illustrating a position relationship of a plurality of RBs according to an embodiment of the present application;

fig. 6 is a schematic diagram of how a network device and a terminal device use respective channels in a communication process according to an embodiment of the present application;

fig. 7 is a schematic diagram of how a network device and a terminal device use respective channels in a communication process according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a network device according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a communication device according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

Hereinafter, some terms in the embodiments of the present application are explained to facilitate understanding by those skilled in the art.

1) Terminal equipment, otherwise referred to as a terminal, includes equipment providing voice and/or data connectivity to a user and may include, for example, handheld devices having wireless connection capability or processing devices connected to wireless modems. The terminal device may communicate with a core network via a Radio Access Network (RAN), exchanging voice and/or data with the RAN. The terminal device may include a UE, a wireless terminal device, a mobile terminal device, a subscriber unit (subscriber unit), a subscriber station (subscriber station), a mobile station (mobile station), a remote station (remote station), an Access Point (AP), a remote terminal device (remote terminal), an access terminal (access terminal), a user terminal (user terminal), a user agent (user agent), a user equipment (user device), or the like. For example, mobile phones (or so-called "cellular" phones), computers with mobile terminal equipment, portable, pocket, hand-held, computer-included or vehicle-mounted mobile devices, smart wearable devices, and the like may be included. For example, Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), smartwatches, smarthelmets, smartglasses, smartbands, and the like. Also included are constrained devices, such as devices that consume less power, or devices that have limited storage capabilities, or devices that have limited computing capabilities, etc. Examples of information sensing devices include bar codes, Radio Frequency Identification (RFID), sensors, Global Positioning Systems (GPS), laser scanners, and the like.

2) A network device, e.g., including a base station (e.g., access point), may refer to a device in an access network that communicates over the air-interface, through one or more cells, with wireless terminal devices. The base station may be configured to interconvert received air frames and Internet Protocol (IP) packets as a router between the terminal device and the rest of the access network, which may include an IP network. The base station may also coordinate management of attributes for the air interface. For example, the base station may include an evolved Node B (NodeB or eNB or e-NodeB) in an LTE system or an evolved LTE system (LTE-Advanced, LTE-a), or may also include a next generation Node B (gNB) in a fifth generation mobile communication technology (5G) New Radio (NR) system, which is not limited in the embodiments of the present application.

3) Narrowband internet of things (NB-IoT), the current third generation partnership project (3 GPP) standard is studying cellular network-based, and by designing a new air interface, the characteristics of narrowband technology are fully utilized to carry IoT services, and this type of IoT is called NB-IoT.

The NB-IoT system constructs an internet of things, occupies a bandwidth of 180KHz or 200KHz, can be directly deployed in a global system for mobile communication (GSM) system, a Universal Mobile Telecommunications System (UMTS), or a Long Term Evolution (LTE) system, and can also be deployed independently to reduce the deployment cost.

For the UE in the NB-IoT system, only communication with the base station on one RB can be supported, so that the NB-IoT system is easy to flexibly deploy. Compared with the traditional cellular network, the service and terminal equipment of the NB-IoT system have the following characteristics:

(1) low-rate and long-period service: NB-IoT traffic produces smaller packets than traditional cellular networks, while generally not being very sensitive to latency.

(2) The requirement of mass connection is as follows: for terminal devices of the internet of things such as large-scale deployed intelligent water/electricity meters, intelligent homes, automobiles and wearable devices, a large number of terminal devices of this type may be covered under one NB-IoT base station, for example, the number may exceed tens of thousands.

(3) The low cost requirement is as follows: compared with the existing cellular network terminal equipment, the NB-IoT system requires lower cost of the terminal equipment so as to realize mass deployment of the terminal equipment. The low cost requirement requires a low complexity implementation of the terminal device.

(4) Low power consumption requirements: the NB-IoT system requires lower power consumption of the terminal equipment, so that the battery power of the terminal equipment is saved, the overlong standby time of the terminal equipment is ensured, and the labor cost for replacing the battery is saved.

To meet the above requirements of low cost, deep coverage, etc., NB-IoT systems have many unique designs. For example, NB-IoT systems do not have PUCCH to simplify terminal equipment and reduce cost. In addition, in order to achieve deep coverage, a control channel (e.g., a Narrowband Physical Downlink Control Channel (NPDCCH)) and a data channel (e.g., a Narrowband Physical Downlink Shared Channel (NPDSCH), a Narrowband Physical Uplink Shared Channel (NPUSCH)) of the NB-IoT system use a repeated transmission method, and for the same content, the probability of successful reception of a terminal device with poor coverage is increased through hundreds of repeated transmissions.

4) MTC communication technology capable of supporting coverage enhancement. MTC requires a system bandwidth of at least 6 RBs. In the sub-frame of the system message transmission, the system message occupies 6 RBs. Similarly, in the subframe of paging message transmission, the paging message occupies 6 RBs. In a subframe of random access channel transmission, the random access channel occupies 6 RBs.

In the coverage enhancement mode a, a low-complexity terminal device supporting MTC or a coverage-enhanced terminal device may perform Physical Uplink Shared Channel (PUSCH) transmission or Physical Downlink Shared Channel (PDSCH) reception on at most 25 RBs or 24 RBs in a system bandwidth. Wherein the system bandwidth may be greater than 25 RBs, for example, the system bandwidth is any one of 50 RBs, 75 RBs, 100 RBs, 200 RBs, 400 RBs, and 800 RBs. Or the system bandwidth may be less than or equal to 25 RBs, e.g., the system bandwidth is 15 RBs. The base station allocates no more than 25 RBs or 24 RBs at most to a terminal device of low complexity or a terminal device with enhanced coverage. Because the terminal equipment supporting the MTC can support communication with the base station on more RBs, the terminal equipment supporting the MTC can well support voice, mobility, and medium-high rate transmission.

5) The terms "system" and "network" in the embodiments of the present application may be used interchangeably. The "plurality" means two or more, and in view of this, the "plurality" may also be understood as "at least two" in the embodiments of the present application. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" generally indicates that the preceding and following related objects are in an "or" relationship, unless otherwise specified.

And, unless stated to the contrary, the embodiments of the present application refer to the ordinal numbers "first", "second", etc., for distinguishing a plurality of objects, and do not limit the sequence, timing, priority, or importance of the plurality of objects.

The technical scheme provided by the embodiment of the application can be applied to an LTE system or an LTE-Advanced (LTE-A) system. Of course, the technical solutions provided in the embodiments of the present application may also be applied to other communication systems, such as an NR system. As long as a presentity in the communication system needs to indicate a resource allocation for communication with another entity, the other entity needs to interpret the resource allocation in some way.

An application scenario of the embodiment of the present application is described below, please refer to fig. 1, which is a schematic diagram of the application scenario. Fig. 1 includes a network device and a terminal device, where the network device may schedule an RB or RBs to transmit information with one or more of terminal devices 1 to 6. The network device in fig. 1 is, for example, AN Access Network (AN) device, such as a base station. As can be seen from fig. 1, the base station and the terminal equipment 1 to 6 are located in one communication system. In this communication system, the base station transmits scheduling information to one or more of the terminal apparatuses 1 to 6. Furthermore, terminal devices 4 to 6 may also constitute a communication system in which terminal device 5 may transmit scheduling information to one or more of terminal device 4 and terminal device 6. The RB in the present application may be a resource block in an LTE system, a resource block in an NR system, or a newly defined resource unit.

The technical scheme provided by the embodiment of the application is described below with reference to the accompanying drawings.

Referring to fig. 2, an embodiment of the present application provides a communication method, and in the following description, the method is applied to the application scenario shown in fig. 1 as an example. It should be noted that, in the embodiment of the present application, a new communication system is substantially provided, in which information transmission between a terminal device and a network device through 1 RB is supported, and information transmission between a terminal device and a network device through multiple RBs is also supported, that is, the communication system fully utilizes the advantages of an NB-IoT system and machine-type communications (MTC) MTC, and can support both flexible independent deployment, large coverage and efficient capacity, support voice, support services at various rates, and support mobility. The communication method provided by the embodiment of the application is realized in the communication system. The flow of the method is described below.

S21, the network device sends the synchronization channel and the broadcast channel to the first terminal device and the second terminal device in N resource blocks, so that both the first terminal device and the second terminal device served by the network device can obtain the synchronization channel and the broadcast channel in N resource blocks, where N is a positive integer greater than 0.

Here, for a broadcast type channel, it can be understood that a network device transmits to all terminal devices served by the network device.

The frequency resources occupied by the N resource blocks are less than or equal to a maximum channel bandwidth (maximum channel bandwidth) of the second terminal device, and the maximum channel bandwidth of the second terminal device is less than the maximum channel bandwidth of the first terminal device. The maximum channel bandwidth of the first terminal device is, for example, a bandwidth corresponding to 6 RBs, the maximum channel bandwidth of the second terminal device is, for example, a channel bandwidth corresponding to 1 RB, the second terminal device is, for example, a terminal device supporting an NB-IoT system, and the first terminal device is, for example, a terminal device supporting an eMTC system or an MTC system, which is not limited to this embodiment of the present invention. Optionally, N may be a decimal number, except for a positive integer, that is, N is only greater than 0, and then, for example, N is less than or equal to 1, that is, for any type of terminal device, the network device may transmit the synchronization channel and the broadcast channel through fewer RBs, so that the communication system provided by the embodiment of the present application can support flexible deployment. The frequency resource described herein is less than or equal to the maximum channel bandwidth, which can be understood as follows: the total frequency resource occupied by the N RBs may be narrower than the maximum channel bandwidth of the second terminal device, or may be equal to the maximum channel bandwidth of the second terminal device. The maximum channel bandwidth of the terminal device can be simply understood as the maximum bandwidth supported by the terminal device. In addition, if N is a fractional number, it can be understood that the network device schedules with subcarrier granularity, for example, N ═ 0.5 indicates that the network device schedules half of the subcarriers in one RB.

When the network device transmits the synchronization channel, the synchronization channel may be transmitted over N RBs, and may be understood that each RB of the N RB includes a synchronization channel, for example, the synchronization channel is a Narrowband Primary Synchronization Signal (NPSS) and a Narrowband Secondary Synchronization Signal (NSSS) of an NB-IoT system.

When the network device transmits the broadcast channel, the broadcast channel may also be transmitted over N RBs, where each RB includes a broadcast channel, for example, the broadcast channel adopts a Narrowband Physical Broadcast Channel (NPBCH) of an NB-IoT system.

In the embodiment of the present application, there is no limitation on the transmission sequence of the synchronization channel and the broadcast channel, or the network device may transmit the synchronization channel and the broadcast channel at the same time.

The information transmitted between the network device and the terminal device may be various, and may be roughly divided into common information and proprietary information, and the common information includes, for example, information transmitted on a synchronization channel (which may be understood as a synchronization channel), information transmitted on a broadcast channel (which may be understood as a broadcast channel), system information, paging information, and some information in a random access procedure. The system information may include a system resource block (SIB) 1 and other SIBs, such as SIB2, SIB3, and the like, and the information in the random access process includes, for example, information (which may be understood as a random access channel) transmitted on a Physical Random Access Channel (PRACH), a Random Access Response (RAR) in the random access process, a contention resolution message, and the like, where the random access response is a message (Msg)2 in the random access process, the contention resolution message is Msg4 in the random access process, and a response message to the random access response sent by the terminal device in the random access process is Msg 3. The random access channel and Msg3 are messages sent by the terminal device to the network device, and Msg2 and Msg4 are messages sent by the network device to the terminal device. The proprietary information includes, for example, unicast data and the like. As already mentioned above, the transmission of the synchronization channel and the broadcast channel are described, and how other information is transmitted is described below.

First, public information.

1、SIB1。

The network device may transmit on K RBs when transmitting SIB1, K being a positive integer greater than 0 and K being greater than or equal to N. If K is less than or equal to 1, the network device may choose to transmit a Narrowband System Information Block (NSIB) 1 in the NB-IoT system. Alternatively, K may be greater than 1 in order to improve the transmission performance of SIB 1.

Alternatively, if K is greater than 1, the SIB1 carried on each RB may be self-decoded information, that is, the terminal device may decode the information carried on each RB independently of the information carried on other RBs, and it is understood that independent information is transmitted on each RB. The information carried by each RB may be the same or different, and if the same, it is equivalent to SIB1 being repeatedly transmitted on multiple RBs. The broadcast channel may indicate scheduling information of the SIB1, for example, the network device may transmit a Master Information Block (MIB) through the broadcast channel, and the MIB may indicate scheduling information of the SIB1, so that the terminal device may receive the SIB1 according to the indication of the MIB.

For the terminal device, if it is the second terminal device, the maximum channel bandwidth of such terminal device is smaller, such terminal device can normally receive if K is less than or equal to 1, and if K is greater than 1, such terminal device can receive only the information transmitted on one of RBs because the information transmitted on each of RBs can be self-decoded. If the terminal device is a new version of terminal device, for example, the terminal device is the first terminal device, the maximum channel bandwidth of the terminal device is larger, and the terminal device can receive the SIB1 sent by the network device through K RBs.

2. Other SIBs.

When the network device transmits other SIBs, the network device may transmit on K RBs, where K is a positive integer greater than 0 and is greater than or equal to N. If K is less than or equal to 1, the network device may choose to transmit the NSIB in the NB-IoT system. Alternatively, K may be greater than 1 in order to improve the transmission performance of SIB 1.

Optionally, if K is greater than 1, the other SIBs carried on each RB may be self-decoded information, that is, the terminal device may decode the information carried on each RB independently of the information carried on the other RBs, and it is understood that independent information is transmitted on each RB. The information carried by each RB may be the same or different, and if the information carried by each RB is the same, it is equivalent to that other SIBs are repeatedly transmitted on multiple RBs. Wherein SIB1 may indicate scheduling information of other SIBs, so that the terminal device may receive the other SIBs according to the indication of SIB 1.

For the terminal device, if it is the second terminal device, the maximum channel bandwidth of such terminal device is smaller, such terminal device can normally receive if K is less than or equal to 1, and if K is greater than 1, such terminal device can receive only the information transmitted on one of RBs because the information transmitted on each of RBs can be self-decoded. However, if the terminal device is a new version of terminal device, for example, the terminal device is the first terminal device, and the maximum channel bandwidth of the terminal device is larger, the terminal device can receive other SIBs sent by the network device through K RBs regardless of the value of K.

For common information such as sync channels or broadcast channels, the position of occupied RBs may be predefined by a protocol, and for common information such as SIB1 or other SIBs, information such as the number and/or position of occupied RBs may be indicated by a broadcast channel, e.g., by an MIB. For example, the network device may send, to the first terminal device, indication information via a broadcast channel, where the indication information indicates the number K of RBs occupied by system information transmission, or is predefined by a protocol. Wherein the broadcast channel or protocol may also indicate the position of each RB occupied by the common information so that the terminal device can directly determine, more simply, or, if the common information occupies consecutive RBs, the broadcast channel or protocol may also indicate the position of the starting RB occupied by the common information and the number of occupied RBs, or indicate the position of the starting RB occupied by the common information and the number of occupied RBs other than the starting RB.

Wherein, other RBs occupied by the common information than the starting RB may be RBs in a direction decreasing in frequency from the starting RB, which is shown in FIG. 3, and referring to FIG. 3, the starting RB is RB n in FIG. 3, and the other RBs are RB n-1, RB n-2, RB n-3, and RB n-4, wherein RB n, RB n-1, RB n-2, RB n-3, and RB n-4 are continuous RBs or discontinuous RBs.

Alternatively, the other RBs occupied by the common information may be RBs in a direction increasing in frequency from the starting RB, which is RB n in fig. 3, except for the starting RB, which is RB n +1, RB n +2, RB n +3, and RB n +4, where RB n, RB n +1, RB n +2, RB n +3, and RB n +4 are continuous RBs or discontinuous RBs, as shown in fig. 4.

Alternatively, other RBs occupied by the common information may be RBs symmetric in the frequency domain centered on the starting RB, which is shown in FIG. 3 with reference to FIG. 5, and the starting RB is RB n, and the other RBs are RB n +1, RB n +2, RB n-1, and RB n-2, where RB n, RB n +1, and RB n +2 are continuous RBs or discontinuous RBs, and RB n, RB n-1, and RB n-2 are continuous RBs or discontinuous RBs.

3. Msg2/4 in the random access procedure.

As an example, for Msg2/4, the network device may determine how to send based on the frequency resources used by the terminal device to initiate random access. For example, a first terminal device sends a random access channel to a network device on a first frequency resource, the network device receives the random access channel sent by the first terminal device on the first frequency resource, where the number of RBs included in the first frequency resource is greater than N, the network device may send a first physical downlink control channel to the first terminal device, the first terminal device receives the first physical downlink control channel sent by the network device, and the first physical downlink control channel is used to schedule a first physical downlink shared channel, so that the network device sends Msg2 or Msg4 to the first terminal device through the first physical downlink shared channel, and the first terminal device receives Msg2 or Msg4 sent by the network device through the first physical downlink shared channel. For another example, the second terminal device sends a random access channel to the network device on the second frequency resource, and the network device receives the random access channel sent by the second terminal device on the second frequency resource, where the number of RBs included in the second frequency resource is less than or equal to N, the network device may send a second physical downlink control channel to the second terminal device, and the second terminal device receives the second physical downlink control channel sent by the network device, and the second physical downlink control channel is used for scheduling a second physical downlink shared channel, so that the network device sends Msg2 or Msg4 to the second terminal device through the second physical downlink shared channel, and the second terminal device receives Msg2 or Msg4 sent by the network device through the second physical downlink shared channel. Thereby ensuring that the scheduled channel is adapted to the number of RBs scheduled by the network device.

In this embodiment of the present application, the first physical downlink control channel is, for example, a Machine Physical Downlink Control Channel (MPDCCH), the first physical downlink shared channel is, for example, a PDSCH, the second physical downlink control channel is, for example, an NPDCCH, and the second physical downlink shared channel is, for example, an NPDSCH, which is not limited in this embodiment of the present application.

As another example, the network devices use a uniform scheduling approach for Msg2 and/or Msg 4. Then, no matter what frequency resource is used by the terminal device to transmit the random access channel, the network device performs scheduling by using the second physical downlink control channel and the second physical downlink shared channel. For example, the first terminal device sends the random access channel to the network device through the third frequency resource, and whether the number of RBs included in the third frequency resource is less than or equal to N or greater than N, the network device sends a second physical downlink control channel to the first terminal device, and the first terminal device receives the second physical downlink control channel sent by the network device, where the second physical downlink control channel is used to schedule the second physical downlink shared channel, so that the network device sends Msg2 or Msg4 to the first terminal device through the second physical downlink shared channel, and the first terminal device receives Msg2 or Msg4 sent by the network device through the second physical downlink shared channel. By the method, various terminal devices can normally receive the data, and various transmission modes are not needed, so that the system is simple to realize.

As another example, even if the maximum channel bandwidth of the first terminal device is greater than the maximum channel bandwidth of the second terminal device, the first terminal device may send the random access channel to the network device on fewer frequency resources, for example, the first terminal device sends the random access channel to the network device through the third frequency resource, and the number of RBs included in the third frequency resource is less than or equal to N, then the network device may schedule a channel with a smaller bandwidth for the first terminal device, for example, the network device sends the second physical downlink control channel to the first terminal device, then the first terminal device receives the second physical downlink control channel sent by the network device, and the second physical downlink control channel is used to schedule the second physical downlink shared channel, so that the network device sends Msg2 or Msg4 to the first terminal device through the second physical downlink shared channel, and the first terminal equipment receives the Msg2 or the Msg4 sent by the network equipment through the second physical downlink shared channel. Therefore, the network device can schedule a channel with a larger bandwidth for the first terminal device and also can schedule a channel with a smaller bandwidth for the first terminal device, which is more flexible and can improve the success rate of transmission.

In this embodiment of the application, the network device may further indicate whether the Msg4 sent to the terminal device is transmitted through the first physical downlink shared channel or the second physical downlink shared channel, and the network device may indicate through different manners, which is flexible.

For example, the network device may indicate whether the Msg4 sent to the first terminal device uses the first physical downlink shared channel transmission or the second physical downlink shared channel transmission through the Msg2, and after the first terminal device receives the Msg2, it may determine whether the Msg4 sent by the network device to the first terminal device uses the first physical downlink shared channel transmission or the second physical downlink shared channel transmission.

Alternatively, the network device may indicate, through a physical downlink control channel, whether Msg4 sent to the first terminal device is transmitted using a first physical downlink shared channel or a second physical downlink shared channel, where the physical downlink control channel is a control channel for scheduling Msg2 or a control channel for scheduling Msg 4.

In addition, the network device may also schedule the Msg4 through a physical downlink control channel, and then the network device may also indicate whether the physical downlink control channel is a first physical downlink control channel or a second physical downlink control channel. For example, the network device may indicate whether the physical downlink control channel used for scheduling the Msg4 is the first physical downlink control channel or the second physical downlink control channel through the Msg2, and the first terminal device may determine whether the physical downlink control channel used for scheduling the Msg4 is the first physical downlink control channel or the second physical downlink control channel after receiving the Msg 2.

4. Msg3 in the random access procedure.

For Msg3, the network device can indicate what kind of shared channel transmission it uses, and the network device can indicate it in different ways, which is flexible.

For example, the network device may indicate whether the Msg3 of the first terminal device uses the first physical uplink shared channel transmission or the second physical uplink shared channel transmission through the Msg2, and the first terminal device may determine whether the first terminal device uses the first physical uplink shared channel or the second physical uplink shared channel to send the Msg3 to the network device by receiving the Msg2 sent by the network device.

Or, the network device may also indicate, through the physical downlink control channel, whether the Msg2 transmission of the first terminal device adopts the first physical uplink shared channel transmission or the second physical uplink shared channel transmission, and the first terminal device may determine, by receiving the physical downlink control channel sent by the network device, whether the first terminal device adopts the first physical uplink shared channel or the second physical uplink shared channel to send the Msg3 to the network device. Here, the physical downlink control channel is a control channel for scheduling Msg2 or a control channel for scheduling a retransmission Msg 2.

In this embodiment of the present application, the first physical uplink shared channel is, for example, a PUSCH, and the second physical uplink shared channel is, for example, an NPUSCH, which is not limited in this embodiment of the present application.

It should be noted that the network device may determine the coverage enhancement level or the coverage enhancement mode of the first terminal device.

When the coverage enhancement level of the first terminal device is a first coverage enhancement level or the coverage enhancement mode of the first terminal device is a first coverage enhancement mode:

I. the network device adopts a first physical downlink control channel to schedule the Msg2 (or the Msg3 or the Msg4), and then the first terminal device receives the scheduling through the first physical downlink control channel;

or the network device transmits the Msg2 (or Msg4) by using the first physical downlink shared channel, and the first terminal device receives the Msg2 (or Msg4) by using the first physical downlink shared channel;

or when the coverage enhancement level of the first terminal device is the first coverage enhancement level or the coverage enhancement mode of the first terminal device is the first coverage enhancement mode, the first terminal device sends Msg3 to the network device by using the first physical uplink shared channel, and the network device receives Msg3 by using the first physical uplink shared channel;

and IV, the first terminal equipment adopts the first random access channel to send the random access preamble to the network equipment, and the network equipment adopts the first random access channel to receive the random access preamble.

When the coverage enhancement level of the first terminal device is the second coverage enhancement level or the coverage enhancement mode of the second terminal device is the second coverage enhancement mode:

I. the network device adopts a second physical downlink control channel to schedule the Msg2 (or the Msg3 or the Msg4), and the first terminal device receives the scheduling through the second physical downlink control channel;

or the network device transmits the Msg2 (or Msg4) by using a second physical downlink shared channel, and the first terminal device receives the Msg2 (or Msg4) through the second physical downlink shared channel;

or when the coverage enhancement level of the first terminal device is a second coverage enhancement level or the coverage enhancement mode of the second terminal device is a second coverage enhancement mode, the first terminal device sends Msg3 to the network device by adopting a second physical uplink shared channel, and the network device receives Msg3 by adopting the second physical uplink shared channel;

and IV, the first terminal equipment adopts a second random access channel to send a random access preamble to the network equipment, and the network equipment adopts the second random access channel to receive the random access preamble.

In the present embodiment, the first coverage enhancement level may be understood as a set of coverage enhancement levels, which may include one or more specific coverage enhancement levels, and the second coverage enhancement level may be understood as a set of coverage enhancement levels, which may include one or more specific coverage enhancement levels, for example, the first coverage enhancement level includes a coverage enhancement level 0 and a coverage enhancement level 1, and the second coverage enhancement level includes a coverage enhancement level 2 and a coverage enhancement level 3. Similarly, the first coverage enhancement mode may be understood as a set of coverage enhancement modes, which may include one or more specific coverage enhancement modes, and the second coverage enhancement mode may be understood as a set of coverage enhancement modes, which may include one or more specific coverage enhancement modes. For example, the first coverage enhancement mode includes a coverage enhancement mode a and the second coverage enhancement mode includes a coverage enhancement mode B. The ranges of the first coverage enhancement level, the first coverage enhancement mode, the second coverage enhancement level, the second coverage enhancement mode, etc. may all be predefined by the protocol.

For another example, the first random access channel is a PRACH, and the second random access channel is a Narrowband Physical Random Access Channel (NPRACH).

That is, in this embodiment of the present application, the network device may determine how to schedule according to the coverage enhancement mode or the coverage enhancement level of the first terminal device, for example, the higher the coverage enhancement level of the first terminal device is, the worse the channel quality is, the network device may use a channel with less occupied RBs for scheduling, so as to ensure that the random access is successful as much as possible, and save resources as much as possible; and the lower the coverage enhancement level is, the better the channel quality is, the network equipment can adopt the channel occupying more RBs for scheduling so as to improve the transmission reliability and the transmission quality.

5. And paging information.

As an example, for paging information, the network device may determine how to transmit the paging information according to the number of RBs scheduled. For example, when the number of RBs scheduled by the network device is less than or equal to N, the network device may schedule a second physical downlink shared channel through the second physical downlink control channel, the terminal device receives the second physical downlink control channel, the network device further carries paging information through the second physical downlink shared channel, and the terminal device receives the paging information sent by the network device through the second physical downlink shared channel. Or, when the number of RBs scheduled by the network device is greater than N, the network device schedules the first physical downlink shared channel through the first physical downlink control channel, and then the terminal device receives the first physical downlink control channel, and the network device sends the paging information through the first physical downlink shared channel, and then the terminal device receives the paging information sent by the network device through the first physical downlink shared channel. Thereby ensuring that the scheduled channel is adapted to the number of RBs scheduled by the network device.

As another example, for paging information, the network device may also determine how to send the paging information according to a data channel used to carry the paging information. For example, if the data channel for carrying the paging information is the second physical downlink shared channel, the network device determines to schedule less than or equal to N RBs to transmit the paging information, and if the data channel for carrying the paging information is the first physical downlink shared channel, the network device determines to schedule more than N RBs to transmit the paging information.

As another example, for paging information, the network devices all use a uniform scheduling method. Then, no matter how many RBs are scheduled by the network device, and no matter what data channel is used for carrying paging information, the network device schedules the second physical downlink shared channel through the second physical downlink control channel, and then the terminal device receives the second physical downlink control channel, and then the network device carries the paging information through the second physical downlink shared channel, and then the network device receives the cycle information sent by the network device through the second physical downlink shared channel. Therefore, various terminal devices can normally receive paging information, and various transmission modes are not needed, so that the system is simpler to realize.

For the terminal device, if the terminal device is the second terminal device, the maximum channel bandwidth of such terminal device is smaller, such terminal device may receive the paging information normally if the network device carries the paging information through the second physical downlink shared channel, and such terminal device may not receive the paging information if the network device carries the paging information through the first physical downlink shared channel. However, if the terminal device of the new version is, for example, the first terminal device, and the maximum channel bandwidth of such a terminal device is large, no matter the network device carries the paging information through the second physical downlink shared channel or through the first physical downlink shared channel, such a terminal device should be able to receive the paging information sent by the network device.

The above public information is all the public information transmitted by the network device to the terminal device, and another public information transmitted by the terminal device to the network device is described below.

6. Information transmitted on the PRACH, or understood as the PRACH.

As an example, for the PRACH, different types of terminal devices may select different transmission modes, and then the different types of terminal devices may all select a transmission mode that meets their own requirements. Then, if the terminal device is a second terminal device, for example, a terminal device of NB-IoT of Rel-13 or Rel-14, and the maximum channel bandwidth of such terminal device is smaller, such terminal device may transmit the random access channel on the second frequency resource, and the network device also receives the random access channel transmitted by such terminal device through the second frequency resource. If the terminal device is a new version of terminal device, for example, a first terminal device, the maximum channel bandwidth of the terminal device is large, and the random access channel can be sent on the first frequency resource, so that the network device receives the random access channel sent by the terminal device through the first frequency resource. Alternatively, if the terminal device is the first terminal device, the first terminal device may determine whether to perform random access using the first frequency resource or the second frequency resource according to a coverage enhancement level or a Reference Signal Receiving Power (RSRP) measurement. For example, the higher the coverage enhancement level is, or the smaller the RSRP value is, the worse the channel quality is, the first terminal device may select the second frequency resource for random access, so as to ensure that the random access is successful as much as possible, while the lower the coverage enhancement level is, or the larger the RSRP value is, the better the channel quality is, the first terminal device may select the first frequency resource for random access, so as to improve reliability. For the network device, the detection can be performed on both the first frequency resource and the second frequency resource, so as to avoid omitting the random access channel sent by the terminal device as much as possible.

As another example, for the random access channel, different types of terminal devices may select the same transmission mode, and the terminal devices do not need to make too many selections, which is relatively simple to implement. For example, whether the first terminal device or the second terminal device is the first terminal device or the second terminal device, the random access channel may be sent through a third frequency resource, where the number of RBs included in the third frequency resource is less than or equal to N, and the network device receives the random access channel sent by the terminal device on the third frequency resource. This ensures that various types of terminal equipment can support it. And for the network equipment, the network equipment only needs to detect in the third frequency resource, and does not need to detect in various frequency resources, so that the workload of the network equipment is reduced.

As described above, the network device or the terminal device transmits the common information, and as described below, the network device transmits the private information.

Second, proprietary information.

For the first terminal device, the network device allocates H RBs for uplink data transmission of the first terminal device, where H is a positive integer. When H is greater than the first threshold, the first terminal device sends uplink data to the network device through the first physical uplink shared channel, and the network device receives the uplink data sent by the first terminal device through the first physical uplink shared channel, and when H is less than or equal to the first threshold, the first terminal device sends the uplink data to the network device through the second physical uplink shared channel, and the network device receives the uplink data sent by the first terminal device through the second physical uplink shared channel. For example, the first threshold is less than or equal to 1, the first threshold is not limited to an integer, and may also be a decimal number, for example, 0.5, and if the first threshold is a decimal number, it may be understood that the network device allocates RBs to the terminal device with subcarrier as granularity.

For the second terminal device, if the number of RBs allocated by the network device for uplink transmission of the second terminal device may be less than or equal to the first threshold, the second terminal device sends uplink data to the network device through the second physical uplink shared channel, and the network device receives the uplink data sent by the second terminal device through the second physical uplink shared channel.

In the embodiment of the application, the proprietary information is respectively transmitted to different terminal devices, so that the network device can adopt different scheduling modes for terminal devices of different versions, thereby better meeting the actual requirements of the terminal devices. For example, for a first terminal device, the maximum channel bandwidth of such a terminal device is larger, H may be larger than a first threshold in order to improve the reliability of transmission, while for a second terminal device, the maximum channel bandwidth is smaller, and in order to improve the success rate of transmission, the number of RBs allocated by the network device for uplink data transmission of the second terminal device may be smaller than or equal to the first threshold. Of course, for the first terminal device, the network device may allocate the RB for uplink data transmission of the first terminal device according to actual conditions, and the first terminal device can support whether H allocated by the network device is greater than the first threshold or less than or equal to the first threshold. Therefore, the communication system provided by the embodiment of the application has a flexible data transmission mode. The first threshold may be equal to N, but may not be equal to N.

When the network device needs to receive the uplink data sent by the terminal device, the network device firstly needs to schedule the uplink shared channel adopted by the terminal device. Taking the first terminal device as an example, in this embodiment of the present application, the network device may determine a coverage enhancement level or a coverage enhancement mode of the first terminal device, when the coverage enhancement level of the first terminal device is the first coverage enhancement level or the coverage enhancement mode of the first terminal device is the first coverage enhancement mode, the network device may schedule the first terminal device to perform uplink data transmission using the first physical uplink shared channel, that is, H is greater than a first threshold, and when the coverage enhancement level of the first terminal device is the second coverage enhancement level or the coverage enhancement mode of the first terminal device is the second coverage enhancement mode, the network device may schedule the first terminal device to perform uplink data transmission using the second physical uplink shared channel, that is, H is less than or equal to the first threshold.

The network device may schedule the first terminal device to perform uplink data transmission using the first physical uplink shared channel to transmit more data if the coverage enhancement level of the first terminal device is the first coverage enhancement level or the coverage enhancement mode of the first terminal device is the first coverage enhancement mode, which indicates that the coverage of the first terminal device is better and the transmission quality is better, and may schedule the first terminal device to perform uplink data transmission using the second physical uplink shared channel to improve the transmission success rate if the coverage enhancement level of the first terminal device is the second coverage enhancement level or the coverage enhancement mode of the first terminal device is the second coverage enhancement mode, which indicates that the coverage of the first terminal device is worse and the transmission quality is worse.

In addition, when the network device schedules the terminal device, the network device generally uses the downlink control channel for scheduling, for example, the network device may still transmit the downlink control channel to the terminal device according to the coverage enhancement level or the coverage enhancement mode of the terminal device, which is described below.

Taking the first terminal device as an example, the network device determines a coverage enhancement level or a coverage enhancement mode of the first terminal device, when the coverage enhancement level of the first terminal device is a first coverage enhancement level or the coverage enhancement mode of the first terminal device is a first coverage enhancement mode, the network device may send a first physical downlink control channel to the first terminal device, and the first terminal device receives the first physical downlink control channel sent by the network device, and when the coverage enhancement level of the first terminal device is a second coverage enhancement level or the coverage enhancement mode of the first terminal device is a second coverage enhancement mode, the network device may send a second physical downlink control channel to the first terminal device, and the first terminal device receives the second physical downlink control channel sent by the network device. In addition, when the coverage enhancement level of the first terminal device is the first coverage enhancement level or the coverage enhancement mode of the first terminal device is the first coverage enhancement mode, the network device may also send the first physical downlink shared channel to the first terminal device, and then the first terminal device receives the first physical downlink shared channel sent by the network device. And when the coverage enhancement level of the first terminal device is the second coverage enhancement level or the coverage enhancement mode of the first terminal device is the second coverage enhancement mode, the network device may send the second physical downlink shared channel to the first terminal device, and then the first terminal device receives the second physical downlink shared channel sent by the network device.

The network device may send a first physical downlink control channel to the first terminal device to transmit more detailed control information if the coverage enhancement level of the first terminal device is a first coverage enhancement level or the coverage enhancement mode of the first terminal device is a first coverage enhancement mode, which indicates that the coverage of the first terminal device is better and the transmission quality is better, and send a second physical downlink control channel to the first terminal device to improve the transmission success rate if the coverage enhancement level of the first terminal device is a second coverage enhancement level or the coverage enhancement mode of the first terminal device is a second coverage enhancement mode, which indicates that the coverage of the first terminal device is worse and the transmission quality is worse.

Referring to fig. 6 and 7, how the network device and the terminal device use the respective channels during communication will be described. Fig. 6 is a schematic diagram of different scheduling manners for a part of common information network devices and different types of frequency resources for random access channels used by different types of terminal devices, where an upper dotted box indicates that N RB scheduling is used, a lower dotted box indicates that more than N RB scheduling is used, and 6 RBs are taken as an example. Fig. 7 is a schematic diagram of the same scheduling method for the common information network device and the same type of frequency resources for the random access channel for different types of terminal devices. The frequency resource types are different, which mainly means that the number and/or the location of RBs included in the frequency resource are different.

The following describes the apparatus provided in the embodiments of the present application with reference to the drawings.

Fig. 8 shows a schematic structural diagram of a network device 800. The network device 800 may implement the functionality of the network devices referred to above. The network device 800 may include a transceiver 801. Optionally, the network device 800 may also include a processor 802. Among other things, transceiver 801 may be used to perform S21 in the embodiment shown in fig. 2, and/or other processes for supporting the techniques described herein. The processor 802 may be configured to determine a coverage enhancement level or a coverage enhancement mode for the first terminal device and/or to perform other processes in support of the techniques described herein.

For example, a transceiver 801 for transmitting a synchronization channel and a broadcast channel to a first terminal device and a second terminal device in N resource blocks; wherein N is a positive integer greater than 0; and the frequency resources occupied by the N resource blocks are less than or equal to the maximum channel bandwidth of the second terminal, and the maximum channel bandwidth of the second terminal is less than the maximum channel bandwidth of the first terminal.

All relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again.

Fig. 9 shows a schematic structural diagram of a terminal device 900. The terminal device 900 may implement the functionality of the first terminal device referred to above. The terminal device 900 may include a transceiver 901. Optionally, the terminal device 900 may further include a processor 902. Among other things, transceiver 901 may be used to perform S21 in the embodiment shown in fig. 2, and/or other processes for supporting the techniques described herein. Processor 902 can be configured to determine a coverage enhancement level or a coverage enhancement mode for terminal device 900 and/or to perform other processes in support of the techniques described herein.

For example, the transceiver 901 is configured to receive a synchronization channel and a broadcast channel transmitted by a network device in N resource blocks; wherein N is a positive integer greater than 0; the frequency resources occupied by the N resource blocks are less than or equal to the maximum channel bandwidth of the second terminal device served by the network device, and the maximum channel bandwidth of the second terminal device is less than the maximum channel bandwidth of the terminal device.

In the embodiment of the present application, the network device 800 and the terminal device 900 may be presented in a form of dividing each functional module corresponding to each function, or may be presented in a form of dividing each functional module in an integrated manner. A "module" herein may refer to an application-specific integrated circuit (ASIC), a processor and memory that execute one or more software or firmware programs, an integrated logic circuit, and/or other devices that may provide the described functionality.

In a simple embodiment, those skilled in the art can think that the network device 800 or the terminal device 900 can also be realized by the structure of the communication apparatus 1000 as shown in fig. 10.

In a simple embodiment, it will be appreciated by those skilled in the art that the apparatus 500 for transmitting the beam optimization protocol packet or the apparatus 600 for receiving the beam optimization protocol packet can also be implemented by the structure of the communication device 700 as shown in fig. 7.

The communication device 1000 may include a processing unit 1001 and a communication unit 1002, where the processing unit 1001 is, for example, a processor, the communication unit 1002 is, for example, a transceiver, and the transceiver may include a radio frequency circuit. The communication device 1000 may be a field-programmable gate array (FPGA), an ASIC, a system on chip (SoC), a Central Processing Unit (CPU), a Network Processor (NP), a digital signal processing circuit (DSP), a Micro Controller Unit (MCU), a Programmable Logic Device (PLD) or other integrated chips. The communication apparatus 1000 may be disposed in a first terminal device or a network device in the embodiment of the present application, so that the network device or the first terminal device implements the communication method provided in the embodiment of the present application, for example, the communication apparatus 1000 is a chip disposed inside the network device or the first terminal device.

In an alternative implementation, the communication device 1000 may further include a storage unit 1003, and with continued reference to fig. 10, the storage unit 1003 is connected to the processing unit 1001. The storage unit 1003 is used for storing computer programs or instructions, and the processing unit 1001 is used for decoding and executing the computer programs or instructions. It will be appreciated that these computer programs or instructions may comprise the functionality of the network device described above or the functionality of the first terminal device. When the functional program of the network device is decoded and executed by the processing unit 1001, the network device can implement the functions of the network device in the communication method according to the embodiment of the present application. When the functional program of the first terminal device is decoded and executed by the processing unit 1001, the first terminal device can be enabled to implement the function of the first terminal device in the communication method according to the embodiment of the present application.

In another alternative implementation, the functional programs of these network devices are stored in a storage unit external to the communication apparatus 1000, where the storage unit includes, for example, a storage unit external to the communication apparatus 1000 in the network device, such as a read-only memory (ROM) or another type of static storage device that can store static information and instructions, a Random Access Memory (RAM), and the like. When the functional program of the network device is decoded and executed by the processing unit 1001, the storage unit 1003 temporarily stores a part or all of the content of the functional program of the network device. Alternatively, the functional programs of these first terminal devices are stored in a memory external to the communication apparatus 1000. When the functional program of the first terminal device is decoded and executed by the processing unit 1001, the storage unit 1003 temporarily stores a part or all of the content of the functional program of the first terminal device.

In another alternative implementation, the functional programs of these network devices are set in a storage unit 1003 stored inside the communication apparatus 1000, which is taken as an example in fig. 10, where the storage unit 1003 is, for example, a register or a cache. When the storage unit 1003 inside the communication apparatus 1000 stores a function program of a network device, the communication apparatus 1000 may be provided in the network device of the embodiment of the present application. Alternatively, the functional programs of these first terminal devices are provided in the storage unit 1003 stored in the communication apparatus 1000. When the storage unit 1003 inside the communication apparatus 1000 stores the function program of the first terminal device, the communication apparatus 1000 may be provided in the first terminal device of the embodiment of the present application.

In yet another alternative implementation, part of the contents of the functional programs of these network devices are stored in a storage unit external to the communication apparatus 1000, and the other part of the contents of the functional programs of these network devices are stored in a storage unit 1003 inside the communication apparatus 1000. Alternatively, a part of the contents of the function programs of these first terminal devices may be stored in a storage unit external to communication apparatus 1000, and the other part of the contents of the function programs of these first terminal devices may be stored in storage unit 1003 inside communication apparatus 1000.

In addition, the network device 800 provided by the embodiment shown in fig. 8 can also be implemented in other forms. The network device comprises for example a transceiving unit. Optionally, the network device may further include a processing unit. Among other things, the transceiver unit may be used to perform S21 in the embodiment shown in fig. 2, and/or other processes for supporting the techniques described herein. The processing unit may be configured to determine a coverage enhancement level or a coverage enhancement mode for the first terminal device and/or to perform other processes in support of the techniques described herein.

For example, a transceiving unit, configured to transmit a synchronization channel and a broadcast channel to a first terminal device and a second terminal device in N resource blocks; wherein N is a positive integer greater than 0; and the frequency resources corresponding to the N resource blocks are less than or equal to the maximum channel bandwidth of the second terminal, and the maximum channel bandwidth of the second terminal equipment is less than the maximum channel bandwidth of the first terminal equipment.

The embodiment shown in fig. 9 provides a terminal device 900 that can also be implemented in other forms. The terminal equipment comprises for example a transceiving unit. Optionally, the network device may further include a processing unit. Among other things, the transceiver unit may be used to perform S21 in the embodiment shown in fig. 2, and/or other processes for supporting the techniques described herein. The processing unit may be configured to determine a coverage enhancement level or a coverage enhancement mode for terminal device 900 and/or to perform other processes in support of the techniques described herein.

For example, the transceiving unit is configured to receive a synchronization channel and a broadcast channel transmitted by a network device in N resource blocks; wherein N is a positive integer greater than 0; the frequency resources occupied by the N resource blocks are less than or equal to the maximum channel bandwidth of the second terminal device served by the network device, and the maximum channel bandwidth of the second terminal device is less than the maximum channel bandwidth of the terminal device.

Since the network device 800, the terminal device 900 and the communication apparatus 1000 provided in the embodiment of the present application can be used to execute the method provided in the embodiment shown in fig. 2, the technical effects obtained by the method can refer to the above method embodiment, and are not described herein again.

Embodiments of the present application are described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to encompass such modifications and variations.

Claims

A method of communication, comprising:

the network equipment sends a synchronization channel and a broadcast channel to the first terminal equipment and the second terminal equipment in the N resource blocks; n is a positive integer greater than 0;

and the frequency resources occupied by the N resource blocks are less than or equal to the maximum channel bandwidth of the second terminal equipment, and the maximum channel bandwidth of the second terminal equipment is less than the maximum channel bandwidth of the first terminal equipment.
The method of claim 1, wherein the method further comprises:

the network equipment sends system information to the first terminal equipment on K resource blocks, wherein K is a positive integer greater than 0 and is greater than or equal to N;

and when K is greater than 1, the system information carried in each resource block of the K resource blocks by the network equipment is self-decoded information.
The method of claim 1 or 2, wherein the method further comprises:

and the network equipment sends indication information to the first terminal equipment through the broadcast channel, wherein the indication information is used for indicating the number K of the resource blocks occupied by the system information.
A method according to any one of claims 1 to 3, wherein the method further comprises:

the network equipment receives a random access channel from the first terminal equipment on a first frequency resource, wherein the number of resource blocks contained in the first frequency resource is greater than N;

the network equipment sends a first physical downlink control channel to the first terminal equipment, wherein the first physical downlink control channel is used for scheduling a first physical downlink shared channel;

and the network equipment sends a random access response or a competition resolving message to the first terminal equipment through the first physical downlink shared channel.
A method according to any one of claims 1 to 3, wherein the method further comprises:

the network equipment receives a random access channel from the second terminal equipment on a second frequency resource, wherein the number of resource blocks contained in the second frequency resource is less than or equal to N;

the network equipment sends a second physical downlink control channel to the second terminal equipment, and the second physical downlink control channel is used for scheduling a second physical downlink shared channel;

and the network equipment sends a random access response or a competition resolving message to the second terminal equipment through the second physical downlink shared channel.
A method according to any one of claims 1 to 3, wherein the method further comprises:

the network equipment receives a random access channel from the first terminal equipment on a third frequency resource, wherein the number of resource blocks contained in the third frequency resource is less than or equal to N;

the network equipment sends a second physical downlink control channel to the first terminal equipment, and the second physical downlink control channel is used for scheduling a second physical downlink shared channel;

and the network equipment sends a random access response or a contention resolution message to the first terminal equipment through the second physical downlink shared channel.
The method of any one of claims 1 to 6, further comprising:

the network equipment indicates the message 3 of the first terminal equipment to be transmitted through a first physical uplink shared channel or a second physical uplink shared channel through a random access response; or the like, or, alternatively,

the network device indicates the message 3 of the first terminal device to be transmitted through a first physical uplink shared channel or a second physical uplink shared channel through a physical downlink control channel, wherein the physical downlink control channel is a control channel for scheduling random access response or a control channel for scheduling retransmission of the message 3.
The method of any one of claims 1 to 7, further comprising:

the network equipment transmits a contention resolution message sent to the first terminal equipment through a random access response instruction through a first physical downlink shared channel or through a second physical downlink shared channel; or the like, or, alternatively,

the network device indicates, through a physical downlink control channel, that a contention resolution message sent to the first terminal device is transmitted through a first physical downlink shared channel or through a second physical downlink shared channel, where the physical downlink control channel is a control channel for scheduling a random access response or a control channel for scheduling a contention resolution message; or the like, or, alternatively,

the network device indicates, to the first terminal device through a random access response, a physical downlink control channel of a scheduling contention resolution message, which is the first physical downlink control channel or through a second physical downlink control channel.
The method of any one of claims 1 to 8, further comprising:

the network equipment determines the coverage enhancement grade or the coverage enhancement mode of the first terminal equipment;

when the coverage enhancement level of the first terminal device is a first coverage enhancement level or the coverage enhancement mode of the first terminal device is a first coverage enhancement mode, the network device sends a first physical downlink control channel to the first terminal device;

and when the coverage enhancement grade of the first terminal equipment is a second coverage enhancement grade or the coverage enhancement mode of the first terminal equipment is a second coverage enhancement mode, the network equipment sends a second physical downlink control channel to the first terminal equipment.
The method of any one of claims 1 to 9, further comprising:

the network equipment allocates H resource blocks for uplink data transmission of the first terminal equipment, wherein H is a positive integer;

when H is larger than a first threshold, the network equipment receives uplink data from the first terminal equipment through a first physical uplink shared channel;

and when the H is smaller than or equal to the first threshold, the network equipment receives uplink data from the first terminal equipment through a second physical uplink shared channel.
The method of any one of claims 1 to 10, further comprising:

the network equipment determines the coverage enhancement grade or the coverage enhancement mode of the first terminal equipment;

when the coverage enhancement grade of the first terminal equipment is a first coverage enhancement grade or the coverage enhancement mode of the first terminal equipment is a first coverage enhancement mode, the network equipment schedules the first terminal equipment to adopt a first physical uplink shared channel for uplink data transmission;

and when the coverage enhancement grade of the first terminal equipment is a second coverage enhancement grade or the coverage enhancement mode of the first terminal equipment is a second coverage enhancement mode, the network equipment schedules the first terminal equipment to adopt a second physical uplink shared channel for uplink data transmission.
A method of communication, comprising:

the method comprises the steps that terminal equipment receives a synchronous channel and a broadcast channel sent by network equipment in N resource blocks; wherein N is a positive integer greater than 0;

the frequency resources occupied by the N resource blocks are less than or equal to the maximum channel bandwidth of the second terminal device served by the network device, and the maximum channel bandwidth of the second terminal device is less than the maximum channel bandwidth of the terminal device.
The method of claim 12, wherein the method further comprises:

the terminal equipment receives system information from the network equipment on K resource blocks, wherein K is a positive integer greater than 0 and is greater than or equal to N;

and when K is greater than 1, the system information carried in each resource block of the K resource blocks by the network equipment is self-decoded information.
The method of claim 12 or 13, wherein the method further comprises:

and the terminal equipment receives indication information from the network equipment through the broadcast channel, wherein the indication information is used for indicating the number K of the resource blocks occupied by the system information.
The method of any one of claims 12 to 14,

the terminal equipment sends a random access channel to the network equipment on a first frequency resource, wherein the number of resource blocks contained in the first frequency resource is greater than N;

the terminal equipment receives a first physical downlink control channel from the network equipment, wherein the first physical downlink control channel is used for scheduling a first physical downlink shared channel;

and the terminal equipment receives a random access response or a competition resolving message from the network equipment through the first physical downlink shared channel.
The method of any one of claims 12 to 14,

the terminal equipment sends a random access channel to the network equipment on a third frequency resource, wherein the number of resource blocks contained in the third frequency resource is less than or equal to N;

the terminal equipment receives a second physical downlink control channel from the network equipment, and the second physical downlink control channel is used for scheduling a second physical downlink shared channel;

and the terminal equipment receives a random access response or a competition resolving message from the network equipment through the second physical downlink shared channel.
The method of any one of claims 12 to 16, further comprising:

the terminal equipment receives a random access response from the network equipment, wherein the random access response indicates that the message 3 of the terminal equipment is transmitted through a first physical uplink shared channel or a second physical uplink shared channel; or the like, or, alternatively,

the terminal device receives a physical downlink control channel from the network device, where the physical downlink shared channel indicates that the message 3 of the terminal device is transmitted through a first physical uplink shared channel or transmitted through a second physical uplink shared channel, and the physical downlink control channel is a control channel for scheduling a random access response or a control channel for scheduling a retransmission message 3.
The method of any one of claims 12 to 17, further comprising:

the terminal equipment receives a random access response from the network equipment, wherein the random access response indicates that a contention resolution message sent to the terminal equipment is transmitted through a first physical downlink shared channel or a second physical downlink shared channel; or the like, or, alternatively,

the terminal device receives a physical downlink control channel from the network device, wherein the physical downlink control channel indicates that a contention resolution message sent to the terminal device is transmitted through a first physical downlink shared channel or a second physical downlink shared channel, and the physical downlink control channel is a control channel for scheduling a random access response or a control channel for scheduling a contention resolution message; or the like, or, alternatively,

and the terminal equipment receives a random access response from the network equipment, and the random access response indicates a physical downlink control channel of the scheduling contention resolution message to the terminal equipment, wherein the physical downlink control channel is a first physical downlink control channel or a second physical downlink control channel.
The method of any one of claims 12 to 18, further comprising:

when the coverage enhancement level of the terminal equipment is a first coverage enhancement level or the coverage enhancement mode of the terminal equipment is a first coverage enhancement mode, the terminal equipment receives a first physical downlink control channel from network equipment;

and when the coverage enhancement grade of the terminal equipment is a second coverage enhancement grade or the coverage enhancement mode of the terminal equipment is a second coverage enhancement mode, the terminal equipment receives a second physical downlink control channel from the network equipment.
The method of any one of claims 12 to 19, further comprising:

the terminal equipment determines that the network equipment allocates H resource blocks for uplink data transmission of the terminal equipment, wherein H is a positive integer;

when H is larger than a first threshold, the terminal equipment sends uplink data to the network equipment through a first physical uplink shared channel;

and when the H is smaller than or equal to the first threshold, the terminal equipment sends and sends uplink data to the network equipment through a second physical uplink shared channel.
The method of any one of claims 12 to 20, further comprising:

when the coverage enhancement grade of the terminal equipment is a first coverage enhancement grade or the coverage enhancement mode of the terminal equipment is a first coverage enhancement mode, the terminal equipment adopts a first physical uplink shared channel to carry out uplink data transmission;

and when the coverage enhancement grade of the terminal equipment is a second coverage enhancement grade or the coverage enhancement mode of the terminal equipment is a second coverage enhancement mode, the terminal equipment adopts a second physical uplink shared channel to carry out uplink data transmission.
A network device, comprising:

a transceiving unit, configured to send a synchronization channel and a broadcast channel to a first terminal device and a second terminal device in N resource blocks; wherein N is a positive integer greater than 0;

and the frequency resources occupied by the N resource blocks are less than or equal to the maximum channel bandwidth of the second terminal equipment, and the maximum channel bandwidth of the second terminal equipment is less than the maximum channel bandwidth of the first terminal equipment.
The network device of claim 22, wherein the transceiver unit is further configured to:

sending system information to the first terminal equipment on K resource blocks, wherein K is a positive integer greater than 0 and is greater than or equal to N;

and when K is greater than 1, the system information carried in each resource block of the K resource blocks by the network equipment is self-decoded information.
The network device of claim 22 or 23, wherein the transceiver unit is further configured to:

and sending indication information to the first terminal equipment through the broadcast channel, wherein the indication information is used for indicating the number K of the resource blocks occupied by the system information.
The network device according to any of claims 22 to 24, wherein the transceiving unit is further configured to:

receiving a random access channel from the first terminal device on a first frequency resource, wherein the first frequency resource comprises a number of resource blocks greater than N;

sending a first physical downlink control channel to the first terminal device, where the first physical downlink control channel is used to schedule a first physical downlink shared channel;

and sending a random access response or a contention resolution message to the first terminal equipment through the first physical downlink shared channel.
The network device according to any of claims 22 to 24, wherein the transceiving unit is further configured to:

receiving a random access channel from the second terminal device on a second frequency resource, wherein the second frequency resource comprises a number of resource blocks less than or equal to N;

sending a second physical downlink control channel to the second terminal device, where the second physical downlink control channel is used to schedule a second physical downlink shared channel;

and sending a random access response or a contention resolution message to the second terminal equipment through the second physical downlink shared channel.
The network device according to any of claims 22 to 24, wherein the transceiving unit is further configured to:

receiving a random access channel from the first terminal device on a third frequency resource, wherein the number of resource blocks contained in the third frequency resource is less than or equal to N;

sending a second physical downlink control channel to the first terminal device, wherein the second physical downlink control channel is used for scheduling a second physical downlink shared channel;

and sending a random access response or a contention resolution message to the first terminal equipment through the second physical downlink shared channel.
The network device according to any of claims 22 to 27, wherein the transceiving unit is further configured to:

the message 3 indicating the first terminal equipment through the random access response is transmitted through a first physical uplink shared channel or transmitted through a second physical uplink shared channel; or the like, or, alternatively,

and the message 3 indicating the first terminal equipment through a physical downlink control channel is transmitted through a first physical uplink shared channel or a second physical uplink shared channel, wherein the physical downlink control channel is a control channel for scheduling random access response or a control channel for scheduling retransmission of the message 3.
The network device according to any of claims 22 to 28, wherein the transceiving unit is further configured to:

the contention resolution message sent to the first terminal device is indicated by the random access response to be transmitted through the first physical downlink shared channel or transmitted through the second physical downlink shared channel; or the like, or, alternatively,

a contention resolution message sent to the first terminal device is indicated by a physical downlink control channel to be transmitted through a first physical downlink shared channel or a second physical downlink shared channel, wherein the physical downlink control channel is a control channel for scheduling a random access response or a control channel for scheduling a contention resolution message; or the like, or, alternatively,

and indicating the physical downlink control channel of the scheduling contention resolution message to the first terminal equipment through the random access response, wherein the physical downlink control channel is a first physical downlink control channel or a second physical downlink control channel.
The network device according to any of claims 22 to 29, wherein the network device further comprises a processing unit;

the processing unit is configured to determine a coverage enhancement level or a coverage enhancement mode of the first terminal device;

the transceiver unit is configured to send a first physical downlink control channel to the first terminal device when the processing unit determines that the coverage enhancement level of the first terminal device is a first coverage enhancement level or the coverage enhancement mode of the first terminal device is a first coverage enhancement mode; or, when the processing unit determines that the coverage enhancement level of the first terminal device is a second coverage enhancement level or the coverage enhancement mode of the first terminal device is a second coverage enhancement mode, sending a second physical downlink control channel to the first terminal device.
The network device according to any of claims 22 to 30, wherein the network device further comprises a processing unit;

the processing unit is configured to allocate H resource blocks for uplink data transmission of the first terminal device, where H is a positive integer;

the transceiver unit is further configured to receive uplink data from the first terminal device through a first physical uplink shared channel when H is greater than a first threshold; or, when H is less than or equal to the first threshold, receiving uplink data from the first terminal device through a second physical uplink shared channel.
The network device according to any of claims 22 to 31, wherein the network device further comprises a processing unit;

the processing unit is configured to determine a coverage enhancement level or a coverage enhancement mode of the first terminal device;

the transceiver unit is further configured to schedule the first terminal device to perform uplink data transmission by using a first physical uplink shared channel when the processing unit determines that the coverage enhancement level of the first terminal device is a first coverage enhancement level or the coverage enhancement mode of the first terminal device is a first coverage enhancement mode; or, when the processing unit determines that the coverage enhancement level of the first terminal device is the second coverage enhancement level or the coverage enhancement mode of the first terminal device is the second coverage enhancement mode, scheduling the first terminal device to perform uplink data transmission by using a second physical uplink shared channel.
A terminal device, comprising:

a transceiving unit for receiving a synchronization channel and a broadcast channel from a network device in N resource blocks; wherein N is a positive integer greater than 0;

the frequency resources occupied by the N resource blocks are less than or equal to the maximum channel bandwidth of a second terminal device served by the network device, and the maximum channel bandwidth of the second terminal device is less than the maximum channel bandwidth of the terminal device.
The terminal device of claim 33, wherein the transceiver unit is further configured to:

receiving system information from the network device on K resource blocks, wherein K is a positive integer greater than 0 and is greater than or equal to N;

and when K is greater than 1, the system information carried in each resource block of the K resource blocks by the network equipment is self-decoded information.
The terminal device according to claim 33 or 34, wherein the transceiving unit is further configured to:

and receiving indication information from the network equipment through the broadcast channel, wherein the indication information is used for indicating the number K of the resource blocks occupied by the system information.
The terminal device according to any of claims 33 to 35, wherein the transceiver unit is further configured to:

sending a random access channel to the network equipment on a first frequency resource, wherein the number of resource blocks contained in the first frequency resource is greater than N;

receiving a first physical downlink control channel from the network device, wherein the first physical downlink control channel is used for scheduling a first physical downlink shared channel;

and receiving a random access response or a contention resolution message from the network equipment through the first physical downlink shared channel.
The terminal device according to any of claims 33 to 36, wherein the transceiver unit is further configured to:

sending a random access channel to the network equipment on a third frequency resource, wherein the number of resource blocks contained in the third frequency resource is less than or equal to N;

receiving a second physical downlink control channel from the network device, the second physical downlink control channel being used for scheduling a second physical downlink shared channel;

and receiving a random access response or a contention resolution message from the network equipment through the second physical downlink shared channel.
The terminal device according to any of claims 33 to 37, wherein the transceiver unit is further configured to:

receiving a random access response from the network device, wherein the random access response indicates that the message 3 of the terminal device is transmitted through a first physical uplink shared channel or a second physical uplink shared channel; or the like, or, alternatively,

and receiving a physical downlink control channel from the network equipment, wherein the physical downlink shared channel indicates that the message 3 of the terminal equipment is transmitted through a first physical uplink shared channel or a second physical uplink shared channel, and the physical downlink control channel is a control channel for scheduling random access response or a control channel for scheduling retransmission of the message 3.
The terminal device according to any of claims 33 to 38, wherein the transceiver unit is further configured to:

receiving a random access response from the network device, wherein the random access response indicates that a contention resolution message sent to the terminal device is transmitted through a first physical downlink shared channel or a second physical downlink shared channel; or the like, or, alternatively,

receiving a physical downlink control channel from the network device, where the physical downlink control channel indicates that a contention resolution message sent to the terminal device is transmitted through a first physical downlink shared channel or a second physical downlink shared channel, and the physical downlink control channel is a control channel for scheduling a random access response or a control channel for scheduling a contention resolution message; or the like, or, alternatively,

and receiving a random access response from the network equipment, wherein the random access response indicates the physical downlink control channel of the scheduling contention resolution message to the terminal equipment, and the physical downlink control channel is a first physical downlink control channel or a second physical downlink control channel.
The terminal device according to any of claims 33 to 39, characterized in that the terminal device further comprises a processing unit;

the processing unit is configured to determine a coverage enhancement level of the terminal device or a coverage enhancement mode of the terminal device;

the transceiver unit is further configured to: when the processing unit determines that the coverage enhancement grade of the terminal equipment is a first coverage enhancement grade or the coverage enhancement mode of the terminal is a first coverage enhancement mode, receiving a first physical downlink control channel from the network equipment; or, when the processing unit determines that the coverage enhancement level of the terminal device is a second coverage enhancement level or the coverage enhancement mode of the terminal device is a second coverage enhancement mode, receiving a second physical downlink control channel from the network device.
The terminal device according to any of claims 33 to 40, characterized in that the terminal device further comprises a processing unit;

the processing unit is configured to determine that the network device allocates H resource blocks for uplink data transmission of the terminal device, where H is a positive integer;

the transceiver unit is further configured to send uplink data to the network device through a first physical uplink shared channel when H is greater than a first threshold; or, when H is less than or equal to the first threshold, sending and sending uplink data to the network device through a second physical uplink shared channel.
The terminal device according to any of claims 33 to 41, wherein the terminal device further comprises a processing unit;

the processing unit is configured to determine a coverage enhancement level of the terminal device or a coverage enhancement mode of the terminal device;

the transceiver unit is further configured to: when the processing unit determines that the coverage enhancement grade of the terminal equipment is a first coverage enhancement grade or the coverage enhancement mode of the terminal equipment is a first coverage enhancement mode, a first physical uplink shared channel is adopted for uplink data transmission; or, when the processing unit determines that the coverage enhancement level of the terminal device is a second coverage enhancement level or the coverage enhancement mode of the terminal device is a second coverage enhancement mode, performing uplink data transmission by using a second physical uplink shared channel.