WO2020097942A1

WO2020097942A1 - Method for identifying bandwidth capability of terminal, device, and system

Info

Publication number: WO2020097942A1
Application number: PCT/CN2018/116049
Authority: WO
Inventors: 何朗; 宁磊; 李少华; 杜婷
Original assignee: 华为技术有限公司
Priority date: 2018-11-16
Filing date: 2018-11-16
Publication date: 2020-05-22
Also published as: CN112514481A

Abstract

The embodiments of the present application disclose a method for identifying the bandwidth capability of a terminal, a device and a system, relating to the field of communication technology, for solving the existing problem that the transmission rate and access success rate of a terminal cannot be improved, when the bandwidth capability of the terminal is reported by means of msg3. Said method comprises: a first terminal determining a first preamble for indicating the bandwidth capability of the first terminal, and sending, to an access network device, a random access request including the first preamble; and the access network device receiving the random access request that is sent by the first terminal and includes the first preamble, and determining, according to the first preamble, the bandwidth capability of the first terminal.

Description

Method, equipment and system for identifying bandwidth capability of terminal

Technical field

Embodiments of the present application relate to the field of communication technologies, and in particular, to a method, device, and system for identifying the bandwidth capability of a terminal.

Background technique

Due to the development of communication standards and industry needs, some countries or regions may have discontinuous available spectrum (ie, discrete spectrum). Among them, the bandwidth of each frequency point of the discrete spectrum is relatively small and can only provide lower rate access. If the terminal uses the discrete spectrum to communicate with the access network equipment (such as a base station), it cannot meet the communication needs of the terminal's high-speed data service. In order to meet the communication needs of high-speed data services of terminals, carrier aggregation (CA) technology (or discrete narrowband communication technology) is proposed, for example, 2 or more discrete carrier units (CC) are aggregated and distributed together Give the terminal to support the terminal to transmit data services on a larger transmission bandwidth to meet the communication needs of high-speed data services.

Before allocating aggregated carriers to the terminal, the access network device needs to acquire the bandwidth capability of the terminal first, and then allocate aggregated carriers to the terminal according to the bandwidth capability of the terminal. Currently, the terminal can report its bandwidth capability during the random access process. For example, FIG. 1 is an existing random access process. As shown in FIG. 1, the terminal can complete random access through four steps of 1 to 4, and in the third step of random access, the terminal reports the terminal to the access network device The bandwidth capability of the terminal, for example, the terminal can carry the bandwidth capability of the terminal in a message (msg) 3 and send it to the access network device. After receiving the msg3, the access network device obtains the terminal's bandwidth capability from the msg3.

It can be seen from the above that the access network device can recognize the bandwidth capability of the terminal only after receiving the msg3, and allocates an aggregate carrier to the terminal according to the bandwidth capability of the terminal, and interacts with the terminal through the aggregate carrier. Before the access network device receives msg3, the terminal can only interact with the access network device through a single carrier, and cannot increase the terminal's transmission rate and access success rate.

Summary of the invention

Embodiments of the present application provide a method, device, and system for identifying the bandwidth capability of a terminal, so as to solve the problem that when the bandwidth capability of the terminal is reported through msg3, the transmission rate and access success rate of the terminal cannot be improved.

To achieve the above purpose, the embodiments of the present application adopt the following technical solutions:

In a first aspect, a method for identifying a bandwidth capability of a terminal is provided. The method includes: determining a first preamble for indicating the bandwidth capability of the first terminal, and sending the first preamble including the first preamble to an access network device Random access request. Based on the method provided in the first aspect, the bandwidth capacity of the terminal can be indicated by the preamble carried in the random access request, so that the bandwidth capacity of the terminal is reported to the access network device in the first step of the random access process. Compared with the prior art, in this embodiment of the present application, the access network device can recognize the bandwidth capability of the terminal as early as possible, and allocate an aggregate carrier to the terminal device according to the bandwidth capability of the terminal, so that the terminal and the access network device can interact through the aggregate carrier as soon as possible , Because aggregated carriers can bring greater bandwidth, so transmitting data on aggregated carriers can increase the data transmission rate; at the same time, you can also increase the transmission reliability by transmitting repeated code blocks on aggregated carriers to ensure the successful access of the terminal In addition, this method can reduce the delay of the random access process and improve the success rate of access to users who cover far points.

In a possible design, in conjunction with the first aspect, determining the first preamble includes: determining the first preamble according to the correspondence between the preamble and the bandwidth capability and the bandwidth capability of the first terminal. Based on this possible design, the bandwidth capability can be associated with the preamble. When the bandwidth capability of the terminal needs to be reported, the terminal can select the bandwidth corresponding to the terminal in the correspondence by searching for the correspondence between the preamble and the bandwidth capability. The preamble corresponding to the capability carries the selected preamble in the random access request and sends it to the access network device, which is convenient and fast.

In a possible design, in combination with the first aspect or any possible design of the first aspect, the correspondence between the preamble and the bandwidth capability is pre-stored on the terminal. Based on this possible design, the terminal can obtain the correspondence between the bandwidth capability and the preamble from local storage, which is convenient and fast.

In a possible design, in combination with the first aspect or any possible design of the first aspect, the correspondence between the preamble and the bandwidth capability indicates that the bandwidth capability of the first terminal corresponds to one or more Preambles, the first preamble is one of the one or more preambles. Based on this possible design, the bandwidth capability of the terminal can be corresponding to one or more preambles, and any one of the one or more preambles can be used to indicate the bandwidth capability of the terminal.

In a possible design, in combination with the first aspect or any possible design of the first aspect, the bandwidth capability of the first terminal is represented by the maximum bandwidth supported by the first terminal and / or the maximum number of aggregated carriers supported by the first terminal. Based on this possible design, the bandwidth capacity or the number of aggregated carriers can be used to express the bandwidth capability of the terminal.

In a possible design, in combination with the first aspect or any possible design of the first aspect, when the bandwidth capability of the first terminal indicates that the first terminal supports carrier aggregation, the method further includes: The access network device receives a random access response through two or more carriers. Based on this possible design, the access network device can determine whether the terminal supports carrier aggregation according to the bandwidth capability of the terminal, and send a random access response to the terminal through the aggregated carriers (two or more carriers) when the terminal supports the carrier set , Improve the reliability of random access response transmission, and then ensure the terminal's access success rate.

In a possible design, in combination with the first aspect or any possible design of the first aspect, when the bandwidth capability of the first terminal indicates that the first terminal supports carrier aggregation, the method further includes: Or more than two carriers send msg3 to the access network device. Based on this possible design, when the terminal supports the carrier set, aggregated carriers (two or more carriers) can be used to send meg3 to the access network device to improve the reliability of meg3 transmission and ensure the terminal's successful access rate.

In a second aspect, the present application provides a communication device, which may be a terminal or a chip or a system-on-chip in the terminal. The communication device can implement the functions performed by the terminal in the above aspects or possible designs, and the functions can be implemented by hardware, or can be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions. For example, the communication device may include: a determining unit and a sending unit;

The determining unit is configured to determine a first preamble used to indicate the bandwidth capability of the first terminal.

The sending unit is configured to send a random access request including the first preamble to the access network device.

The specific implementation manner of the communication device may refer to the first aspect or any possible design of the first aspect to provide a method for identifying a bandwidth capability of the terminal, a behavior function of the terminal, any one of the first aspect or the first aspect A possible design method may be implemented correspondingly by the determining unit and the sending unit included in the communication device, and details are not repeated here. Therefore, the provided communication device can achieve the same beneficial effects as the first aspect or any possible design of the first aspect.

In a third aspect, a communication device is provided, including: a processor and a memory; the memory is used to store computer-executed instructions, and when the communication device is running, the processor executes the computer-executed instructions stored in the memory, so that the The communication device performs the method for identifying the bandwidth capability of the terminal as described in the first aspect or any one of the possible designs of the first aspect.

According to a fourth aspect, a computer-readable storage medium is provided, in which instructions are stored in the computer-readable storage medium, which when executed on a computer, enables the computer to execute the first aspect or any of the above aspects Design the method for identifying the bandwidth capability of the terminal.

According to a fifth aspect, there is provided a computer program product containing instructions that, when run on a computer, enable the computer to perform any of the first aspect or any possible design of the aforementioned aspect to identify the bandwidth capability of the terminal method.

According to a sixth aspect, a chip system is provided. The chip system includes a processor and a transceiver for supporting a communication device to implement the functions involved in the above aspects. For example, the processor determines the first A preamble, sending a random access request including the first preamble to the access network device through the transceiver. In a possible design, the chip system further includes a memory, which is used to store necessary program instructions and data of the communication device. The chip system may be composed of chips, or may include chips and other discrete devices.

The technical effects brought by any one of the design methods in the third aspect to the sixth aspect can be referred to the technical effects brought by the above-mentioned first aspect or any possible design of the first aspect, and will not be repeated here.

In a seventh aspect, an embodiment of the present application further provides a method for identifying a bandwidth capability of a terminal. The method includes: receiving a random access request sent by a terminal and including a first preamble, where the first preamble is used to indicate the bandwidth of the terminal Capability; The access network device determines the terminal's bandwidth capability based on the first preamble. Based on the method provided in the seventh aspect, the access network device can determine the bandwidth capability of the terminal through the preamble carried in the random access request, so as to identify the bandwidth capability of the reported terminal in the first step of the random access process. Compared with the prior art, in this embodiment of the present application, the access network device can recognize the bandwidth capability of the terminal as early as possible, and allocate an aggregated carrier to the terminal device according to the bandwidth capability of the terminal, so that the terminal and the access network device can interact through the aggregated carrier as soon as possible , Because aggregated carriers can bring greater bandwidth, so transmitting data on aggregated carriers can increase the data transmission rate; at the same time, you can also increase the transmission reliability by transmitting repeated code blocks on aggregated carriers to ensure the successful access of the terminal rate.

In a possible design, with reference to the seventh aspect, the access network device determines the bandwidth capability of the terminal according to the first preamble, including: according to the correspondence between the preamble and the bandwidth capability and the first preamble, determining The bandwidth capability of the first terminal. Based on this possible design, the bandwidth capability can be associated with the preamble. When the access network device receives the preamble, it can search for the corresponding relationship and use the bandwidth capability corresponding to the first preamble in the correspondence as the terminal ’s Bandwidth capability, convenient and fast.

In a possible design, in combination with the seventh aspect or any possible design of the seventh aspect, the correspondence between the preamble and the bandwidth capability is pre-stored on the access network device; or, between the preamble and the bandwidth capability The corresponding relationship is determined by the access network device from the core network device. Based on this possible design, the access network device may determine the correspondence relationship including the correspondence relationship between the bandwidth capability and the preamble from the local or other devices, and the implementation manner is flexible.

In a possible design, in combination with the seventh aspect or any possible design of the seventh aspect, the correspondence between the preamble and the bandwidth capability indicates that the bandwidth capability of the first terminal corresponds to one or more Preambles, the first preamble is one of the one or more preambles. Based on this possible design, the bandwidth capability of the terminal can be corresponding to one or more preambles, and any one of the one or more preambles can be used to indicate the bandwidth capability of the terminal.

In a possible design, in combination with the seventh aspect or any possible design of the seventh aspect, the bandwidth capability of the first terminal is the maximum bandwidth supported by the first terminal and / or the maximum bandwidth supported by the first terminal The maximum number of aggregated carriers is indicated. Based on this possible design, the bandwidth capacity or the number of aggregated carriers can be used to express the bandwidth capability of the terminal.

In a possible design, in combination with the seventh aspect or any possible design of the seventh aspect, when the bandwidth capability of the first terminal indicates that the first terminal supports carrier aggregation, the method further includes: Or more than two carriers send a random access response to the terminal. Based on this possible design, the access network device can determine whether the terminal supports carrier aggregation according to the bandwidth capability of the terminal, and send a random access response to the terminal through the aggregated carriers (two or more carriers) when the terminal supports the carrier set , Improve the reliability of random access response transmission, and then ensure the terminal's access success rate.

In a possible design, in combination with the seventh aspect or any possible design of the seventh aspect, when the bandwidth capability of the first terminal indicates that the first terminal supports carrier aggregation, the method further includes: A terminal receives msg3 through two or more carriers. Based on this possible design, when the terminal supports a carrier set, aggregated carriers (two or more carriers) can be used to receive meg3, which improves the reliability of meg3 reception, and then ensures the terminal's access success rate.

In an eighth aspect, the present application provides a communication device, which may be an access network device or a chip or a system-on-chip in an access network device, and the communication device may implement the seventh aspect or each possible aspect of the seventh aspect The function performed by the access network device in the design. The function may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions. For example, the communication device may include: a receiving unit and a determining unit;

A receiving unit, configured to receive a random access request including a first preamble sent by the first terminal, and the first preamble is used to indicate the bandwidth capability of the first terminal;

The determining unit is configured to determine the bandwidth capability of the first terminal according to the first preamble.

The specific implementation manner of the communication device may refer to the seventh aspect or any possible design of the seventh aspect to provide a method for identifying a bandwidth capability of a terminal, a behavior function of an access network device, the seventh aspect or the seventh aspect Any possible design method may be implemented correspondingly by the receiving unit and the determining unit included in the communication device, and details are not repeated herein. Therefore, the provided communication device can achieve the same beneficial effects as the seventh aspect or any possible design of the seventh aspect.

In a ninth aspect, a communication device is provided, including: a processor and a memory; the memory is used to store computer-executed instructions, and when the communication device is running, the processor executes the computer-executed instructions stored in the memory, so that the The communication device performs the method for identifying the bandwidth capability of the terminal as described in the seventh aspect or any possible design of the seventh aspect.

According to a tenth aspect, a computer-readable storage medium is provided, in which instructions are stored in a computer-readable storage medium, which when executed on a computer, enables the computer to perform the seventh aspect or any of the above aspects Design the method for identifying the bandwidth capability of the terminal.

According to an eleventh aspect, there is provided a computer program product containing instructions which, when run on a computer, enable the computer to perform the seventh aspect or any of the possible designs of the foregoing aspects. Methods.

According to a twelfth aspect, a chip system is provided. The chip system includes a processor and a transceiver, and is used to support a communication device to implement the functions involved in the above aspects. For example, the processor receives the A random access request for a preamble, the first preamble is used to indicate the bandwidth capability of the first terminal; according to the first preamble, the bandwidth capability of the first terminal is determined. In a possible design, the chip system further includes a memory, which is used to store necessary program instructions and data of the communication device. The chip system may be composed of chips, or may include chips and other discrete devices.

For the technical effects brought by any of the design methods in the ninth aspect to the twelfth aspect, reference may be made to the technical effects brought by the above seventh aspect or any possible design of the seventh aspect, which will not be repeated.

According to a thirteenth aspect, there is provided a system for identifying the bandwidth capability of a terminal, including the terminal according to any one of the second aspect to the sixth aspect and the connection according to any one of the eighth aspect to the twelfth aspect Network access equipment.

BRIEF DESCRIPTION

Figure 1 shows the existing random access process;

2 is a simplified schematic diagram of a system architecture provided by an embodiment of this application;

3 is a schematic diagram of the composition of a communication device provided by an embodiment of the present application;

4 is a flowchart of a method for identifying a terminal ’s bandwidth capability according to an embodiment of the present application;

5 is a schematic diagram of the composition of a communication device 50 provided by an embodiment of the present application;

FIG. 6 is a schematic diagram of the composition of a communication device 60 provided by an embodiment of the present application.

detailed description

The idea of the embodiment of the present application is to indicate the bandwidth capability of the terminal through the preamble carried in the random access request, and implement the first step of the random access process to report the bandwidth capability of the terminal to the access network device, so that the access network device The bandwidth capability of the terminal can be identified as early as possible, and the aggregated carrier is allocated to the terminal device according to the bandwidth capability of the terminal as early as possible, so that the terminal and the access network device interact through the aggregated carrier after the first step of the random access process to improve the access speed and The success rate of access reduces the delay of the random access process and improves the success rate of access to remote users.

Before introducing the embodiments of the present application, in order to facilitate understanding of the embodiments of the present application, the nouns involved in the embodiments of the present application are described:

Preamble ((preamble): can be a sequence of sequences. Exemplarily, the preamble can be a sequence with a length of 43 or a sequence of other lengths. The preamble can also be called a random access preamble (random access preamble) ). The preamble can be carried in the random access request and sent to the access network device, so that the access network device determines the terminal to initiate the access request according to the preamble. The communication standard protocol specifies multiple (two or more than two) ) Available preambles, such as: Long Term Evolution (LTE) protocol stipulates 64 available preambles, each preamble is different, in the process of embodiments of this application, these available preambles The codes can be divided into different sets of preambles.

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

The method for identifying the bandwidth capability of a terminal provided in the embodiments of the present application may be applied to any system that supports carrier aggregation, for example, it may be applied to the communication system shown in FIG. 2, and the communication system may be a cellular communication system or LTE. system, but also to the fifth generation (5 ^th generation, 5G) mobile communication system or a new air interface (new radio, NG) system, or may be other mobile communication systems, not limiting. As shown in FIG. 2, the communication system may include an access network device and a terminal. The terminal may transmit data or messages to the access network device through aggregated carriers. In the system shown in FIG. 2, the terminal may pass a random access process ( random access procedure) Establish a connection with the cell and obtain uplink synchronization to perform uplink transmission. It should be noted that FIG. 2 is only an exemplary frame diagram, and the number of devices included in FIG. 2 is not limited, and in addition to the functional nodes shown in FIG. 2, the system described in FIG. 2 may include other nodes, such as a core network. Devices, gateway devices, application servers, etc. are not restricted.

Exemplarily, the terminal in FIG. 2 may be referred to as terminal equipment (terminal equipment) or user equipment (UE) or mobile station (MS) or mobile terminal (MT), etc., which may be deployed On the water (such as ships); can also be deployed in the air (such as aircraft, balloons and satellites, etc.). Specifically, the terminal in FIG. 2 may be a mobile phone, a tablet computer, or a computer with wireless transceiver function. The terminal may also be a virtual reality (VR) terminal, an augmented reality (AR) terminal, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in telemedicine, or a smart grid. Wireless terminals, wireless terminals in smart cities, wireless terminals in smart homes, etc. In the embodiment of the present application, the device for realizing the function of the terminal may be a terminal, or may be a device capable of supporting the terminal to realize the function, such as a chip system. In the embodiment of the present application, the chip system may be composed of a chip, and may also include a chip and other discrete devices. In the technical solutions provided by the embodiments of the present application, the technical solution provided by the embodiments of the present application is described by taking an example in which the device for implementing the functions of the terminal is a terminal.

The access network device in FIG. 2 may be referred to as a network device, and is mainly used to implement functions such as wireless physical control functions, resource scheduling and wireless resource management, wireless access control, and mobility management. Specifically, the access network device may be an access network (AN) / radio access network (RAN) device, or may be a device composed of multiple 5G-AN / 5G-RAN nodes It can also be a base station (nodeB, NB), an evolutionary base station (evolution nodeB, eNB), a next-generation base station (generation nodeB, gNB), a transmission and reception point (TRP), and a transmission point (TP) And any of some other access nodes. In the embodiment of the present application, the apparatus for implementing the function of the access network device may be an access network device, or may be an apparatus capable of supporting the access network device to realize the function, such as a chip system. In the technical solutions provided by the embodiments of the present application, the technical solution provided by the embodiments of the present application is described by taking an example in which the apparatus for realizing the function of the access network device is an access network device.

In the system shown in FIG. 2, the terminal can report the terminal ’s bandwidth capability to the access network device in the first step of the random access process. For example, the terminal can use the preamble carried in the random access request to indicate the terminal ’s bandwidth capability After receiving the random access request including the preamble, the access network device determines the bandwidth capability of the terminal according to the preamble. Specifically, for the method, reference may be made to the embodiment corresponding to FIG. 4.

Among them, in specific implementation, each device shown in FIG. 2 has the components shown in FIG. 3. FIG. 3 is a schematic diagram of the composition of a communication device provided by an embodiment of the present application. When the communication device performs the function of the terminal in the method embodiment, the communication device may be a terminal or a chip or a system on chip within the terminal; when the communication device When performing the function of the access network device in the method embodiment, the communication device may be an access network device or a chip or a system on chip within the access network device. As shown in FIG. 3, the communication device 300 includes at least one processor 301, a communication line 302, and at least one transceiver 303; further, the communication device shown in FIG. 3 may further include a memory 304. Among them, the processor 301, the memory 304 and the transceiver 303 can be connected via a communication line 302. In the embodiments of the present application, at least one may be one, two, three, or more, and the embodiments of the present application are not limited.

In the embodiment of the present application, the processor 301 may be a central processing unit (central processing unit, CPU), a general-purpose processor network processor (NP), a digital signal processor (digital signal processing, DSP), or microprocessing Device, microcontroller, programmable logic device (PLD) or any combination of them. The processor may also be any other device with a processing function, such as a circuit, a device, or a software module.

In the embodiment of the present application, the communication line 302 may include a path for transmitting information between components included in the communication device.

In the embodiment of the present application, the transceiver 303 is used to communicate with other devices or communication networks (such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc.). The transceiver 303 may be a module, a circuit, a transceiver, or any device capable of implementing communication.

In the embodiment of the present application, the memory 304 may be a read-only memory (read-only memory, ROM) or other types of static storage devices that can store static information and / or instructions, or a random access memory (random access memory) , RAM) or other types of dynamic storage devices that can store information and / or instructions, and can also be electrically erasable programmable read-only memory (electrically erasable programmable-read-only memory, EEPROM), compact disk-only (compact disc read- only memory (CD-ROM) or other optical disc storage, optical disc storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store The desired program code in the form of instructions or data structures and any other medium that can be accessed by a computer, but is not limited thereto.

In a possible design, the memory 304 may exist independently of the processor 301, that is, the memory 304 may be a memory external to the processor 301, and at this time, the memory 304 may be connected to the processor 301 through a communication line 302 to store instructions Or program code. When the processor 301 calls and executes the instructions or program codes stored in the memory 304, the data protection method provided by the following embodiments of the present application can be implemented. In another possible design, the memory 304 may also be integrated with the processor 301, that is, the memory 304 may be an internal memory of the processor 301, for example, the memory 304 is a cache, which may be used to temporarily store some data and / or Or instruction information, etc.

As an implementable manner, the processor 301 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 3. As another implementable manner, the communication device 300 may include multiple processors, such as the processor 301 and the processor 307 in FIG. 3.

As yet another implementable manner, when the communication device shown in FIG. 3 is used to perform functions performed by the terminal, as shown in FIG. 3, the communication device 300 may further include an output device 305 and an input device 306. Illustratively, the input device 306 may be a device such as a keyboard, mouse, microphone, or joystick, and the output device 305 may be a device such as a display screen or a speaker.

It should be noted that the above-mentioned communication device 300 may be a general-purpose device or a dedicated device. For example, the communication device 300 may be a desktop computer, a portable computer, a web server, a PDA, a mobile phone, a tablet computer, a wireless terminal, an embedded device, a chip system, or a device having a similar structure as shown in FIG. 3. The embodiment of the present application does not limit the type of the communication device 300. In the embodiment of the present application, the chip system may be composed of a chip, and may also include a chip and other discrete devices.

The method for identifying the bandwidth capability of the terminal provided by the embodiment of the present application will be described below in conjunction with the system shown in FIG. 2. Wherein, each communication device mentioned in the following method embodiments may have the components shown in FIG. 3, which will not be described in detail.

FIG. 4 is a flowchart of a method for identifying a terminal ’s bandwidth capability according to an embodiment of the present application. As shown in FIG. 4, the method may include:

Step 401: The first terminal determines the first preamble.

The above-mentioned first terminal may be any terminal in FIG. 2.

The first preamble may be used to indicate the bandwidth capability of the terminal. In the embodiments of the present application, the bandwidth capabilities of terminals of different categories may be the same or different, and are not limited. For example, terminal 1 supports a maximum of 100MHz, and terminal 2 can also support a maximum of 100MHz. The bandwidth capability of the terminal may be represented by the maximum bandwidth supported by the terminal and / or the maximum number of aggregated carriers supported by the terminal. Among them, the maximum bandwidth supported by the terminal and the maximum number of aggregated carriers supported by the terminal can be converted to each other. For example: assuming that the maximum bandwidth supported by the terminal is 15MHz and the bandwidth of each carrier is 15KHz, the maximum number of aggregated carriers supported by the terminal = 15MHz / 15KHz = 1000. On the contrary, assuming that the maximum number of aggregated carriers supported by the terminal is 1000 and the bandwidth of each carrier is 15KHz, the maximum bandwidth supported by the terminal is 15MHz.

Exemplarily, the first terminal determining the first preamble may include: determining the first preamble according to the correspondence between the preamble and the bandwidth capability and the bandwidth capability of the first terminal. For example, in the correspondence between the preamble and the bandwidth capability, the preamble corresponding to the bandwidth capability of the first terminal is used as the first preamble.

The correspondence between the preamble and the bandwidth capability can be pre-defined by the protocol and configured for the terminal. For example, the correspondence between the preamble and the bandwidth capability can be pre-stored on the terminal. When the terminal executes step 401, The corresponding relationship can be searched locally to determine the first preamble; it should be noted that the bandwidth capability described in the embodiments of the present application represents the bandwidth capability of the terminal.

For example, the following table 1 includes the corresponding relationship between the preamble and the bandwidth capability. As shown in Table 1, the bandwidth capability corresponding to the preamble 1 is: maximum support for 10 aggregated carriers; the bandwidth capability corresponding to the preamble 4 is: maximum support 5 Aggregated carrier; the bandwidth capability corresponding to the preamble 7 is: maximum support for 3 aggregated carriers; when terminal 1 supports a maximum of 5 aggregated carriers, terminal 1 can query this table 1 to find the one corresponding to "maximum supported 5 aggregated carriers" The preamble 4 carries the preamble 4 in the random access request and sends it.

Table I

前导码Preamble	带宽能力Bandwidth capability
前导码1Preamble 1	最大支持10个聚合载波Support up to 10 aggregated carriers
前导码4Preamble 4	最大支持5个聚合载波Support up to 5 aggregated carriers
前导码7Preamble 7	最大支持3个聚合载波Support up to 3 aggregated carriers

Step 402: The first terminal sends a random access request to the access network device.

Wherein, random access includes the first preamble.

Exemplarily, the first terminal may send a random access request to the access network device through the wireless interface between the terminal and the access network device. Wherein, the wireless interface may be a Uu port.

Step 403: The access network device receives the random access request sent by the first terminal.

Step 404: The access network device determines the bandwidth capability of the first terminal according to the first preamble.

Exemplarily, the access network device determining the bandwidth capability of the first terminal according to the first preamble may include: determining the first terminal according to the correspondence between the preamble and the bandwidth capability and the first preamble Bandwidth capabilities. For example, according to the correspondence between the preamble and the bandwidth capability, the bandwidth capability corresponding to the first preamble in the correspondence is used as the bandwidth capability of the terminal.

The correspondence relationship between the preamble and the bandwidth capability is as described above, and the correspondence relationship may be pre-stored on the access network device. When performing step 404, the access network device may look up the correspondence relationship locally, according to the first The preamble determines the bandwidth capability of the terminal; or, the access network device obtains it from the core network device, such as: the correspondence is pre-stored in the network device (such as unified data management network element (unified data management, UDM) or other devices) When the access network device executes step 404, the access network device may obtain the corresponding relationship from the network device, and determine the bandwidth capability of the terminal according to the first preamble.

Based on the method provided in FIG. 4, the bandwidth capacity of the terminal can be indicated by the preamble carried in the random access request, and the bandwidth capacity of the terminal can be reported to the access network device in the first step of the random access process. The bandwidth capability of the terminal can be determined by the preamble carried in the random access request, so that the bandwidth capability of the reported terminal can be identified in the first step of the random access process. Compared with the prior art, the access network device can identify the terminal's bandwidth capability as early as possible, and determine whether the terminal supports carrier aggregation according to the terminal's bandwidth capability, so that the terminal and the access network device can interact through the aggregated carrier as soon as possible to increase the data transmission rate And transmission reliability, thereby ensuring the terminal's access success rate.

Further optionally, after step 404, the access network device may determine whether the first terminal supports carrier aggregation according to the bandwidth capability of the first terminal. Multi-carrier aggregation capability and other information (such as the coverage of the first terminal) send information to the first terminal, such as sending a random access response to the first terminal through two or more carriers. If the first terminal does not support carrier aggregation, the access network device allocates spectrum resources to the first terminal according to a single carrier or sends a random access response.

Wherein, if the maximum number of carriers supported by the first terminal is greater than or equal to 2, it is determined that the first terminal supports carrier aggregation; otherwise, it is determined that the first terminal does not support carrier aggregation. It should be noted that if the bandwidth capability of the first terminal is represented by the maximum bandwidth supported by the first terminal, the access network device may convert the maximum bandwidth supported by the first terminal into the maximum number of carriers supported by the first terminal. According to the first The maximum number of carriers supported by the terminal determines whether the first terminal supports carrier aggregation.

For example, if the maximum number of carriers supported by the terminal is 3, it is determined that the terminal supports carrier aggregation, and the access network device may use 2 or 3 carriers to send a random access response to the terminal.

In this way, the access network device can determine whether the terminal supports carrier aggregation according to the bandwidth capability of the terminal, and send a random access response to the terminal by aggregating carriers (two or more carriers) when the terminal supports carrier aggregation to improve random access. The reliability of the incoming response transmission, and then guarantee the terminal's access success rate.

Further, if the first terminal supports multi-carrier aggregation, the first terminal sends msg3 to the terminal through two or more carriers. In this way, when the first terminal supports the carrier set, aggregated carriers (two or more carriers) can be used to send meg3 to the access network device to improve the reliability of meg3 transmission, thereby ensuring the successful access of the first terminal rate.

Among them, msg3 is a message sent by the terminal when receiving the random access response, and msg3 can also be described as a radio resource control (RRC) request, which can be used to request RRC configuration, etc.

In the method described in FIG. 4, in order to improve the flexibility of preamble selection, the correspondence between the preamble and the bandwidth capability may indicate that the bandwidth capability of the first terminal corresponds to one or more preambles, and the first preamble may be One of the one or more preambles, that is, the correspondence between the preamble and the bandwidth capability, each bandwidth capability may correspond to one or more preambles. In the embodiment of the present application, one or more preambles may be referred to as a preamble set, and the preamble corresponding to the bandwidth capability may be one of the preamble sets.

In this scenario, terminals supporting the same bandwidth capability can choose different preambles. The correspondence between the preamble and the bandwidth capability can be described as the correspondence between the preamble set and the bandwidth capability. The correspondence between the preamble set and the preamble included in the preamble set needs to be pre-configured for the first terminal or the access network device. Among them, the correspondence between the preamble set and the preamble included in the preamble set and the correspondence between the preamble set and the bandwidth capability may be included in the same list or may be included in different lists, without limitation.

Exemplarily, all available preambles may be grouped according to the existing existing bandwidth capabilities of different types of terminals to obtain one or more (two or more) different preamble sets, where different preambles The preambles included in the code set are different, and the preambles included in the same preamble set are also different. A preamble set uniquely corresponds to a bandwidth capability. For example, taking the bandwidth capability as the maximum supported carrier aggregation number, for example, assuming that there are M types of bandwidth capabilities, all available preambles can be divided into M preamble sets according to the following formula (N _{_CA_0} ～ N _{_CA_M-1} ) , M sets of preambles correspond to M kinds of bandwidth capabilities one by one. Among them, N_CA_Set represents the range of the number of aggregated carriers corresponding to each preamble set, N_CA_Set = Floor (N_MAX_CA / M), Floor represents rounded down, and N_MAX_CA represents the maximum number of aggregated carriers in M bandwidth capabilities. For example, there are three types of bandwidth capabilities: support 10 aggregated carriers, 15 aggregated carriers, and 50 aggregated carriers, then N_MAX_CA is 50, 3 preamble sets are 16, and the bandwidth capability corresponding to the first preamble set is : Support 0 aggregated carriers, the bandwidth capacity corresponding to the second preamble set is: support 16 aggregated carriers, and the bandwidth capacity corresponding to the third preamble set is: support 32 aggregated carriers.

It should be noted that the embodiments of the present application include, but are not limited to, dividing the preamble set in the above manner, and allocating the divided preamble set to the bandwidth capability configuration table. In addition, when dividing the set of preambles, part of the preambles in all available preambles can be divided into M sets of preambles, where the reserved preambles do not have the function of indicating the bandwidth capability of the terminal; all available All the preambles in the preambles of M are divided into M sets of preambles, without limitation.

Exemplarily, when the bandwidth capability corresponds to the preamble set, that is, when the bandwidth capability corresponds to one or more preambles; the first terminal determining the first preamble may include: the first terminal according to the preamble set and the bandwidth capability between The correspondence relationship and the bandwidth capability of the first terminal determine the first preamble set corresponding to the bandwidth capability of the first terminal; select any preamble from the first preamble set as the first preamble;

Correspondingly, the access network device determining the bandwidth capability of the first terminal according to the first preamble may include: determining that the first preamble is included in the first preamble set; according to the correspondence between the preamble set and the bandwidth capability , Taking the bandwidth capability corresponding to the first preamble set in the correspondence as the bandwidth capability of the first terminal.

For example, the correspondence between the preamble set and the preamble included in the preamble and the corresponding relationship between the preamble set and the bandwidth capability are included in the same list as an example. Table 2 includes the preamble included in the preamble set and the preamble included in the preamble set. The configuration table of codes and bandwidth capabilities, as shown in Table 2, preamble set 1 includes preamble 1, preamble 2, preamble 3, and the bandwidth capability corresponding to preamble set 1 is: maximum support for 10 aggregated carriers; preamble Set 2 includes preamble 4, preamble 5, and preamble 6, and the bandwidth capacity corresponding to preamble set 2 is: maximum support for 5 aggregated carriers; preamble set 3 includes preamble 7, preamble 8, and preamble 9, The bandwidth capacity corresponding to preamble set 2 is: maximum support for 3 aggregated carriers; when terminal 1 supports a maximum of 5 aggregated carriers, terminal 1 can query Table 2 to find the preamble corresponding to "maximum supported 5 aggregated carriers" Set 2, a preamble (eg, preamble 4) selected from the preamble 4, preamble 5, and preamble 6 included in the preamble set 2 is carried in the random access request and sent.

Table II

前导码集合Preamble collection	前导码Preamble	带宽能力Bandwidth capability
前导码集合1Preamble set 1	前导码1、前导码2、前导码3Preamble 1, Preamble 2, Preamble 3	最大支持10个聚合载波Support up to 10 aggregated carriers
前导码集合2Preamble collection 2	前导码4、前导码5、前导码6Preamble 4, Preamble 5, Preamble 6	最大支持5个聚合载波Support up to 5 aggregated carriers
前导码集合3Preamble collection 3	前导码7、前导码8、前导码9Preamble 7, Preamble 8, Preamble 9	最大支持3个聚合载波Support up to 3 aggregated carriers

It should be noted that the correspondence between the set of preambles and the bandwidth capabilities described in the embodiments of the present application may be dynamic as the available preambles increase (or decrease) or the types of bandwidth capabilities of the terminal increase (or decrease). Update. For example, there are currently three kinds of bandwidth capabilities, but when one kind of bandwidth capability is added, and there is no corresponding preamble corresponding to the newly added bandwidth capability, all available preambles can be grouped again to obtain new bandwidth capabilities and Correspondence between the preamble sets, and the correspondence between the new bandwidth capability and the preamble set is saved.

In addition, when selecting a preamble, the terminal may select a preamble from a set of preambles whose number of supported carriers is less than or equal to the maximum carrier aggregation number of the terminal. For example, assuming that the maximum number of carrier aggregation supported by the terminal is 9, then from Table 2, it can be seen that the preamble in the preamble set 2 (maximum support of 5 carrier aggregation numbers) is selected for transmission. In order to facilitate the search, the search can be performed from the maximum preamble set k = M-1 until the first preamble set that meets the following requirements is found, and the preamble is selected from the found preamble set: the maximum aggregation corresponding to the preamble set The number of carriers is less than or equal to the (maximum) carrier aggregation number supported by the terminal. Or, search from the smallest preamble set k = 0 until the first preamble set that meets the following requirements is found, and select the preamble from the found preamble set: the maximum number of aggregated carriers corresponding to the preamble set is less than or equal to The (maximum) carrier aggregation number supported by the terminal. Or, randomly search until the first preamble set that meets the following requirements is found, and select the preamble from the found preamble set: the maximum number of aggregated carriers corresponding to the preamble set is less than or equal to the (maximum) carrier aggregation supported by the terminal In this embodiment of the present application, the method for searching the preamble set is not limited.

The above mainly introduces the solution provided by the present application from the perspective of interaction between various nodes. It can be understood that, in order to realize the above-mentioned functions, each node, such as a terminal and an access network device, includes a hardware structure and / or a software module corresponding to each function. Those skilled in the art should easily realize that the present invention can be implemented in the form of hardware or a combination of hardware and computer software in combination with the algorithm steps of the examples described in the embodiments disclosed herein. Whether a function is executed by hardware or computer software driven hardware depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present invention.

The present application can divide the functional modules of the terminal and the access network device according to the above method example, for example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one processing module. The above integrated modules may be implemented in the form of hardware or software function modules. It should be noted that the division of modules in this application is schematic, and is only a division of logical functions, and there may be other divisions in actual implementation.

FIG. 5 is a schematic diagram of a composition of a communication device 50 provided by an embodiment of the present application. The communication device 50 may be a first terminal or a chip or a system-on-chip in the first terminal. As shown in FIG. 5, the communication device 50 may include: a determining unit 501 and a sending unit 502;

The determining unit 501 is configured to determine a first preamble used to indicate the bandwidth capability of the first terminal. For example, the determining unit 501 may be used to support the communication device 50 to execute step 401.

The sending unit 502 is configured to send a random access request including the first preamble to an access network device. For example, the sending unit 502 may be used to support the communication device 50 to perform step 402.

It should be noted that all relevant content of the steps involved in the above method embodiments can be referred to the function description of the corresponding function module, which will not be repeated here. The communication device 50 provided by the embodiment of the present application is used to perform the function of the first terminal in the method for identifying the bandwidth capability of the terminal shown in FIGS. 3 to 6, and thus can achieve the same effect as the method for identifying the bandwidth capability of the terminal described above.

As yet another implementable manner, the communication device 50 shown in FIG. 5 may include: a processing module and a communication module. The processing module may integrate the function of the determining unit 501, and the communication module may integrate the function of the sending unit 502. The processing module is used to control and manage the actions of the communication device 50. For example, the processing module is used to support the communication device 50 to perform step 401 and other processes that perform the techniques described herein. The communication module is used to support the communication device 50 to perform step 402 and communicate with other network entities. Further, the communication device 50 shown in FIG. 5 may further include a storage module for storing program codes and data of the communication device 50.

The processing module may be a processor or a controller. It can implement or execute various exemplary logical blocks, modules, and circuits described in conjunction with the disclosure of the present application. The processor can also be a combination of computing functions, for example, including one or more microprocessor combinations, DSP and microprocessor combinations, and so on. The communication module may be a transceiver circuit or a transceiver. The storage module may be a memory. When the processing module is a processor, the communication module is a transceiver, and the storage module is a memory, the communication device 50 shown in FIG. 5 may be the communication device shown in FIG. 3.

FIG. 6 is a schematic diagram of a composition of a communication device 60 provided by an embodiment of the present application. The communication device 60 may be an access network device or a chip or a system-on-chip in the access network device. As shown in FIG. 6, the communication device 60 may include: a receiving unit 601 and a determining unit 602;

The receiving unit 601 is configured to receive a random access request including the first preamble sent by the first terminal, and the first preamble is used to indicate the bandwidth capability of the first terminal; 60 Go to step 403.

The determining unit 602 is configured to determine the bandwidth capability of the first terminal according to the first preamble. For example, the determining unit 602 may be used to support the communication device 60 to perform step 404.

It should be noted that all relevant content of the steps involved in the above method embodiments can be referred to the function description of the corresponding function module, which will not be repeated here. The communication device 60 provided by the embodiment of the present application is used to perform the function of the access network device in the method for identifying the bandwidth capability of the terminal shown in FIG. 3 to FIG.

As yet another implementable manner, the communication device 60 shown in FIG. 6 may include: a processing module and a communication module. The communication module may integrate the function of the receiving unit 601, and the processing module may integrate the function of the determining unit 602. The processing module is used to control and manage the actions of the communication device 60. For example, the processing module is used to support the communication device 60 to perform step 404 and other processes of the technology described herein. The communication module is used to support the communication device 60 to perform step 403 and communicate with other network entities. Further, the communication device 60 shown in FIG. 6 may further include a storage module for storing program codes and data of the communication device 60.

The processing module may be a processor or a controller. It can implement or execute various exemplary logical blocks, modules, and circuits described in conjunction with the disclosure of the present application. The processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, DSP and microprocessor combinations, and so on. The communication module may be a transceiver circuit or a transceiver. The storage module may be a memory. When the processing module is a processor, the communication module is a transceiver, and the storage module is a memory, the communication device 60 shown in FIG. 6 may be the communication device shown in FIG. 3.

Through the description of the above embodiments, those skilled in the art can clearly understand that, for convenience and conciseness of description, only the above-mentioned division of each functional module is used as an example for illustration. In practical applications, the above-mentioned functions can be allocated as needed It is completed by different functional modules, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above.

In the several embodiments provided in this application, it should be understood that the disclosed device and method may be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the modules or units is only a division of logical functions. In actual implementation, there may be other divisions, for example, multiple units or components may be The combination can either be integrated into another device, or some features can be ignored, or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may be one physical unit or multiple physical units, that is, may be located in one place, or may be distributed in multiple different places . Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

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

If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a readable storage medium. Based on this understanding, the technical solution of the present application may be essentially or part of the contribution to the existing technology or all or part of the technical solution may be embodied in the form of a software product, which is stored in a storage medium Several instructions are included to enable a device (which may be a single-chip microcomputer, chip, etc.) or processor to execute all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage media include various media that can store program codes, such as a U disk, a mobile hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited to this, any changes or replacements within the technical scope disclosed by the present invention should be covered within the scope of protection of the present invention . Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

A method for identifying the bandwidth capability of a terminal, characterized in that the method includes:

Determining a first preamble; wherein the first preamble is used to indicate the bandwidth capability of the first terminal;

Sending a random access request to the access network device; wherein the random access request includes the first preamble.
The method according to claim 1, wherein the determining the first preamble comprises:

The first preamble is determined according to the correspondence between the preamble and the bandwidth capability and the bandwidth capability of the first terminal.
The method according to claim 2, characterized in that

The correspondence between the preamble and the bandwidth capability is pre-stored on the first terminal.
The method according to claim 2 or 3, characterized in that

The correspondence between the preamble and the bandwidth capability indicates that the bandwidth capability of the first terminal corresponds to one or more preambles, and the first preamble is one of the one or more preambles .
The method according to any one of claims 1 to 4, characterized in that

The bandwidth capability of the first terminal is represented by the maximum bandwidth supported by the first terminal and / or the maximum number of aggregated carriers supported by the first terminal.
The method according to any one of claims 1-5, wherein when the bandwidth capability of the first terminal indicates that the first terminal supports carrier aggregation, the method further includes:

Receiving a random access response from the access network device through two or more carriers.
The method according to claim 6, wherein the method further comprises:

Send a message msg3 to the access network device through two or more carriers.
A method for identifying the bandwidth capability of a terminal, characterized in that the method includes:

Receiving a random access request sent by a first terminal; wherein the random access request includes a first preamble, and the first preamble is used to indicate the bandwidth capability of the first terminal;

According to the first preamble, determine the bandwidth capability of the first terminal.
The method according to claim 8, wherein determining the bandwidth capability of the terminal according to the first preamble comprises:

The bandwidth capability of the first terminal is determined according to the correspondence between the preamble and the bandwidth capability and the first preamble.
The method of claim 9, wherein:

The correspondence between the preamble and the bandwidth capability is pre-stored on the; or,

The correspondence between the preamble and the bandwidth capability is obtained by the slave core network device.
The method according to claim 9 or 10, characterized in that

The correspondence between the preamble and the bandwidth capability indicates that the bandwidth capability of the first terminal corresponds to one or more preambles, and the first preamble is one of the one or more preambles .
The method according to any one of claims 8-11, characterized in that

The bandwidth capability of the first terminal is represented by the maximum bandwidth supported by the first terminal and / or the maximum number of aggregated carriers supported by the first terminal.
The method according to claims 8-12, wherein when the bandwidth capability of the first terminal indicates that the first terminal supports carrier aggregation, the method further comprises:

Sending a random access response to the terminal through two or more carriers.
The method of claim 13, wherein the method further comprises:

Receive msg3 from the first terminal through two or more carriers.
A communication device includes a processor. The processor is coupled to a memory. The memory is used to store a computer program or instruction. The processor is used to execute the computer program or instruction in the memory, so that the communication device executes rights The method according to any one of claims 1 to 7 is required.
A communication device includes a processor. The processor is coupled to a memory. The memory is used to store a computer program or instruction. The processor is used to execute the computer program or instruction in the memory, so that the communication device executes rights The method according to any one of 8 to 14 is required.