CN114374932B

CN114374932B - Wireless communication method and device, terminal and management equipment

Info

Publication number: CN114374932B
Application number: CN202011099805.8A
Authority: CN
Inventors: 王化磊
Original assignee: Beijing Ziguang Zhanrui Communication Technology Co Ltd
Current assignee: Beijing Ziguang Zhanrui Communication Technology Co Ltd
Priority date: 2020-10-14
Filing date: 2020-10-14
Publication date: 2023-06-06
Anticipated expiration: 2040-10-14
Also published as: CN114374932A

Abstract

The embodiment of the application discloses a wireless communication method and device, a terminal and management equipment, wherein the method comprises the following steps: the terminal receives broadcast information from the management device, the broadcast information being transmitted on L overhead symbols of consecutive K superframes starting from the first superframe in the period of the broadcast channel, K and L being integers. In the embodiment of the present application, since the broadcast information is transmitted on L overhead symbols of K consecutive superframes from the first superframe in the period of the broadcast channel, the embodiment of the present application introduces the period of the broadcast channel, and takes the period of the broadcast channel as the period for transmitting the broadcast information, thereby determining the time for transmitting the broadcast information through the period of the broadcast channel, and effectively reducing the network overhead.

Description

Wireless communication method and device, terminal and management equipment

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a wireless communication method and apparatus, a terminal, and a management device.

Background

Currently, the chinese communication standardization association (China Communications Standards Association, CCSA) is developing protocol standards for vehicle-mounted wireless short-range communication (automotive wireless short-range communication), which mainly define the access layer portion of the vehicle-mounted wireless short-range communication system.

The access layer portion specifically includes a data link layer and a physical layer. The physical layer provides physical connection for the data link layer by using a transmission medium, so that transparent transmission of the bit stream is realized. Meanwhile, the physical layer defines a physical resource and a frame structure based on cyclic prefix orthogonal frequency division multiplexing (Cyclic PrefixOrthogonal Frequency Division Multiplexing, CP-OFDM) waveforms and Time Division Duplexing (TDD), and defines physical layer control information transmitted in the physical layer link on the basis of the physical resource and the frame structure. Wherein the physical layer control information is transmitted using a set of resource elements for carrying control information originating from a higher layer, and the physical layer control information includes broadcast information. However, further research is required on how to determine the time of broadcast information transmission by its protocol standard.

Disclosure of Invention

The embodiment of the application provides a wireless communication method and device, a terminal and management equipment, which are used for determining the time for transmitting broadcast information through the period of a broadcast channel and effectively reducing network overhead.

In a first aspect, an embodiment of the present application provides a wireless communication method, including:

the terminal receives broadcast information from the management device, wherein the broadcast information is transmitted on L system overhead symbols of K continuous superframes at the beginning of a first superframe in the period of a broadcast channel, and K and L are integers.

In a second aspect, an embodiment of the present application provides a wireless communication method, including:

the management device transmits broadcast information to the terminal on L overhead symbols of consecutive K superframes starting from a first superframe in a period of the broadcast channel, where K and L are integers.

In a third aspect, an embodiment of the present application provides a wireless communication device, which is applied to a terminal; the device comprises a processing unit and a communication unit, wherein the processing unit is used for:

and receiving, by the communication unit, broadcast information from the management device, the broadcast information being transmitted on L overhead symbols of K consecutive superframes starting from a first superframe in a period of a broadcast channel, the K and the L being integers.

In a fourth aspect, embodiments of the present application provide a wireless communication apparatus applied to a management device; the device comprises a processing unit and a communication unit, wherein the processing unit is used for:

and transmitting broadcast information to the terminal through the communication unit on L system overhead symbols of K continuous superframes starting from the first superframe in the period of the broadcast channel, wherein K and L are integers.

In a fifth aspect, embodiments of the present application provide a terminal comprising a processor, a memory, a communication interface, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the processor, the programs comprising instructions for performing the steps in any of the methods of the first aspect of embodiments of the present application.

In a sixth aspect, embodiments of the present application provide a management device comprising a processor, a memory, a communication interface, and one or more programs, wherein the one or more programs are stored in the memory and configured for execution by the processor, the programs comprising instructions for performing steps in any of the methods of the second aspect of embodiments of the present application.

In a seventh aspect, embodiments of the present application provide a chip, including: a processor for calling and running a computer program from a memory, causing a device on which the chip is mounted to perform some or all of the steps as described in any of the methods of the first or second aspects of the embodiments of the present application.

In an eighth aspect, embodiments of the present application provide a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for electronic data exchange, wherein the computer program causes a computer to perform some or all of the steps as described in any of the methods of the first or second aspects of embodiments of the present application.

In a ninth aspect, embodiments of the present application provide a computer program, wherein the computer program is operable to cause a computer to perform some or all of the steps as described in any of the methods of the first or second aspects of the embodiments of the present application. The computer program may be a software installation package.

As can be seen, in the embodiment of the present application, since the broadcast information is transmitted on L overhead symbols of K consecutive superframes from the first superframe in the period of the broadcast channel, the embodiment of the present application introduces the period of the broadcast channel, and takes the period of the broadcast channel as the period for transmitting the broadcast information, thereby determining the time for transmitting the broadcast information through the period of the broadcast channel, and effectively reducing the network overhead.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following description will briefly introduce the drawings that are needed in the embodiments or the description of the prior art, it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic architecture diagram of a vehicle-mounted wireless short-range communication system according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a protocol stack architecture of a vehicle-mounted wireless short-range communication system according to an embodiment of the present application;

fig. 3 is a schematic flow chart of a wireless communication method according to an embodiment of the present application;

Fig. 4 is a functional unit block diagram of a wireless communication device according to an embodiment of the present application;

fig. 5 is a functional unit block diagram of still another wireless communication device according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a terminal according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a management device according to an embodiment of the present application.

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden for the embodiments herein, are intended to be within the scope of the present application.

The technical scheme of the embodiment of the application can be applied to a vehicle-mounted wireless short-range communication (automotive wireless short-range communication) system, and the vehicle-mounted wireless short-range communication system comprises a terminal and management equipment.

Exemplary, the vehicle-mounted wireless short-range communication system applied in the embodiment of the present application is shown in fig. 1. The in-vehicle wireless short-range communication system 10 may include a management device 110 and a terminal 120. Among them, the management device 110 may be a device that performs communication with the terminal 120. At the same time, the management device 110 may provide communication coverage for a particular geographic area and may communicate with terminals 120 located within that coverage area.

Optionally, the vehicle-mounted wireless short-range communication system 10 may further include a plurality of management devices, and each management device may include a number of terminals within a coverage area thereof, which is not particularly limited herein.

Alternatively, the communication between the management apparatus and the terminal, between the management apparatus and the management apparatus, and between the terminals in the in-vehicle wireless short-range communication system 10 may be wireless communication or wired communication, and is not particularly limited herein.

Since the embodiments of the present application describe respective embodiments in connection with a terminal and a management apparatus, the terminal and the management apparatus to which they relate will be specifically described below.

Specifically, the terminal in the embodiments of the present application may be a terminal Node (T-Node or T-Node), an in-vehicle device, an in-vehicle terminal, an off-vehicle device, an off-vehicle terminal, a car key, an in-car camera device, or an audio device, which may be a User Equipment (UE), a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, an intelligent terminal, a wireless communication device, a user agent, or a user apparatus, and may also be a cellular phone, a cordless phone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (wireless local loop, WLL) station, a personal digital assistant (personal digital assistant, PDA), a handheld device with a wireless communication function, a computing device, or other processing device connected to a wireless modem, a relay device, a wearable device, a terminal in a new wireless (new radio, NR) network, a terminal in a future evolved public land mobile communication network (public land mobile network, a PLMN), or a terminal in a non-terrestrial network (non-terrestrial networks, NTN), or the like, which is not particularly limited.

Further, the terminal may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) device, an augmented reality (augmented reality, AR) device, a terminal device in an industrial control (industrial control), a vehicle-mounted device in an unmanned driving (self driving), a terminal device in a remote medical (remote medical), a terminal device in a smart grid (smart grid), a terminal device in a transportation security (transportation safety), a terminal device in a smart city (smart city), a terminal device in a smart home (smart home), or the like.

Specifically, the management device in the embodiment of the present application may be a management Node (G-Node or G-Node), may be a device having a management or control function in a vehicle, may be an evolved Node b (evolutional Node B, eNB or eNodeB) in a long term evolution (long term evolution, LTE) communication system or a base station (gNB) in an NR communication system, and may also be an Access Point (AP) in a wireless local area network (wireless local area network, WLAN), a relay station, a network device in a PLMN network for future evolution, or a network device in an NTN communication system, which is not limited in particular.

Before describing the wireless communication method provided in the embodiment of the present application in detail, the related communication technology related to the present application will be described.

1. Related communication concepts

Management node: and the node of the vehicle-mounted wireless short-distance communication system for transmitting the data scheduling information.

Terminal node: and the vehicle-mounted wireless short-distance communication system receives the data scheduling information and transmits data according to the data scheduling information.

G link (G link): managing node-to-terminal node communication links. The link may carry data channels, control channels, broadcast channels, synchronization signals, etc. from the management node to the terminal nodes.

T link (T link): communication link from terminal node to management node. The link may carry data channels, access channels, etc. from the end node to the management node.

2. Protocol stack structure of vehicle-mounted wireless short-distance communication system

The protocol stack architecture of the vehicle-mounted wireless short-range communication system is shown in fig. 2. Wherein the access layer portion specifically includes a data link layer and a physical layer. The physical layer provides physical connection for the data link layer by utilizing a transmission medium, so that transparent transmission of the bit stream is realized; the data link layer performs the functions of resource management, access control, data segmentation, concatenation, reordering and the like, and ensures the reliable transfer of data. In order to realize safe and efficient data transmission between access layer management equipment (such as G-Node) and a terminal (T-Node), necessary management functions and security functions such as connection management, authentication, security mechanism updating, resource scheduling and the like are required between the management equipment and the terminal. Information interaction can be performed between layers, and a lower layer provides services for an upper layer.

3. Physical layer

(1) General description

The physical layer provides data transfer services to the data link layer. Wherein, the physical layer defines a physical resource and a frame structure based on cyclic prefix orthogonal frequency division multiplexing (Cyclic PrefixOrthogonal Frequency Division Multiplexing, CP-OFDM) waveform and Time Division Duplexing (TDD), and defines physical layer signals, physical layer control information and physical layer data information transmitted in the physical layer link on the basis.

The physical layer signal is transmitted using a set of resource elements that are not used to carry information originating from higher layers. The physical layer signals include G-link physical layer signals and T-link physical layer signals. Wherein the G link physical layer signal represents a physical layer signal applicable to the G link; the T-link physical layer signal represents a physical layer signal applicable to the T-link.

The physical layer control information is transmitted using a set of resource elements for carrying control information originating from higher layers. The physical layer control information includes G-link physical layer control information and T-link physical layer control information. Wherein, the G link physical layer control information represents physical layer control information applicable to the G link; the T-link physical layer control information indicates physical layer control information applicable to the T-link. Meanwhile, the G link physical layer control information comprises broadcast information and G link control information; the T-link physical layer control information includes access information and T-link control information.

The physical layer data information is transmitted using a set of resource elements for carrying data information originating from higher layers. Wherein the data information originating from the higher layer comprises higher layer signaling.

Specifically, physical layer signals, physical layer control information, and physical layer data information defined by the physical layer are shown in table 1.

TABLE 1

It should be noted that, the various time lengths of the physical layer are all the basic time units T _S Is a multiple of (2). Basic time unit T _S Defined as T _S =1/fs, where the physical layer reference frequency fs is 30.72MHz.

(2) Frame structure and physical resources

1) Waveform and symbol

The physical layer signal, physical layer control information, and physical layer data information are transmitted based on CP-OFDM waveforms of sub-carrier spacing Δf=fs/64=480 kHz. The CP-OFDM symbol comprises a cyclic prefix part and an effective data part in the time domain, wherein the length of the effective data part is 64T _S Cyclic prefix length:

time length of CP-OFDM symbol:

without confusion, the symbols are used herein as shorthand for CP-OFDM symbols.

2) Wireless frame structure

G-link transmission and T-link transmission use different symbols in a radio frame, G-link transmissionThe symbols used for transmission are referred to as G symbols and the symbols used for transmission by the T-link are referred to as T symbols. One radio frame is sequentially composed of one or more G symbols, a first switching interval (GAP 1), one or more T symbols and a second switching interval (GAP 2); or one radio frame is sequentially composed of one or more T symbols, a first switching interval (GAP 1), one or more G symbols and a second switching interval (GAP 2); or a radio frame is composed of a plurality of symbols and an inter-frame space time GT in sequence. One radio frame contains

The symbols are numbered #0, #1, …, # and->

GAP1 and GAP2 have a time length T _GAP 。

For the case of a normal cyclic prefix:

when the radio frame includes GAP1 and GAP2, T _GAP ＝44·T _s The radio frame structure has 14 structures according to the difference in the number and position of G symbols, T symbols.

For the case of extended cyclic prefix:

when the radio frame includes GAP1 and GAP2, T _GAP ＝47·T _s The radio frame structure has 12 structures according to the difference in the number and position of G symbols, T symbols. />

3) Overhead symbols and data symbols

The overhead transmission and the data transmission use different symbols in the radio frame. Wherein the overhead transmission comprises physical layer control information transmission and partial physical layer signaling, and the data transmission comprises physical layer data information transmission (including higher layer signaling transmission) and another partial physical layer signaling.

The symbols used for G-link overhead transmission are referred to as G-link overhead symbols and the symbols used for T-link overhead transmission are referred to as T-link overhead symbols. The G-link overhead symbols and T-link overhead symbols are collectively referred to as overhead symbols when the transmission directions are not distinguished.

The symbols used for G-link data transmission are referred to as G-link data symbols and the symbols used for T-link data transmission are referred to as T-link data symbols. The G-link data symbols and T-link data symbols are collectively referred to as data symbols when the transmission directions are not distinguished.

4) Half Super Frame (Half Super Frame) and Super Frame

A half superframe is defined as the length of time consisting of 24 radio frames in a vehicle-mounted wireless short-range communication system. That is, every 24 radio frames constitute one half superframe, and the time length of each half superframe is 0.5ms.

A superframe is defined as the length of time consisting of 48 radio frames in an in-vehicle wireless short-range communication system. That is, every 2 half superframes constitute one superframe, and the time length of each superframe is 1ms. Thus, one superframe includes 48 radio frames numbered #0, #1, …, #47 in order of time from front to back.

5) Carrier wave

One carrier is composed of 39 consecutive subcarriers, and 39 subcarriers are numbered #0, #1, …, #38 in order of the corresponding frequencies from low to high. Wherein, the #19 subcarrier is a DC subcarrier, and the other 38 subcarriers except the DC subcarrier are called effective subcarriers.

The management node uses one or more carriers simultaneously. For the case where the management node uses a plurality of carriers simultaneously, the management node transmits a physical layer signal and physical layer control information applicable to each carrier in use, and allows the terminal node to assume synchronization of the plurality of carriers used by the management node.

6) Communication domain (Communication Domain)

On a carrier used by a management node, the management node transmits resources of synchronization signals, broadcast information, G-link control information, and a set of resources made up of resources that the management node can schedule and configure is referred to as a communication domain of the management node, and the management node is referred to as a management node of the communication domain.

Further, a communication domain is composed of a G-link of the communication domain and a T-link of the communication domain. Wherein, the G link of a communication domain is defined as a resource for a management node of the communication domain to transmit physical layer signals, physical layer control information and physical layer data information; the T-link of a communication domain is defined as a resource for a management node of the communication domain to receive physical layer signals, physical layer control information and physical layer data information.

A communication domain system message (DomainSysInfo) is a broadcast transmission by a management node in a communication domain to a terminal node in its communication domain.

(3) Broadcasting information

1) Information bits

Broadcast information and corresponding cyclic redundancy check (Cyclic Redundancy Check, CRC) codes of 63 bits (bits) which carry physical layer configuration parameters, including the following information:

1 bit: cyclic prefix information. 0 indicates a normal cyclic prefix and 1 indicates an extended cyclic prefix.

1 bit: the radio frame structure includes an indication of whether or not GT is included. A 0 indicates that the inter-frame space time (GT) is not included, and a 1 indicates that the GT is included.

4 bits: initial radio frame symbol proportioning information. When a conventional cyclic prefix is adopted, 0-13 indicate 11 radio frame structures, respectively; when the extended cyclic prefix is employed, 0-11 indicates 11 radio frame structures, respectively.

16 bits: a superframe number. Indicating the superframe number of the first superframe among the consecutive 4 superframes in which the broadcast information is transmitted.

3 bits: within one superframe, a radio frame number (N _offset ) Is a piece of instruction information. With 6 radio frames as granularity, the radio frame number where the starting position of the broadcast information is located is 6 x the value of the domain.

2 bits: the management node sends symbol number information N of the common resource of the G link control information communication domain, wherein 00 indicates 4 symbols, 01 indicates 8 symbols, 10 indicates 12 symbols, and 11 is reserved. The G-link control information communication domain specific resource starts N consecutive radio frames within the superframe from a radio frame immediately following the radio frame transmitting the second synchronization signal (Secondary Synchronization Signal, SSS), using a last system overhead symbol in each radio frame.

1 bit: broadcast information or system message change instruction information, 0 indicates that broadcast information and system message are not changed in the next change period, and 1 indicates that broadcast information or system message is changed in the next change period.

2 bits: a change period of broadcast information or a system message, 00 indicates 512 superframes, 01 indicates 1024 superframes, 10 indicates 2048 superframes, and 11 indicates 4096 superframes.

9 bits: reserved bits, the current version is all 0;

24 bits: generating polynomial g using cyclic redundancy check _CRC24B (D) A cyclic redundancy check sequence is calculated.

2) Resource mapping

Broadcast information usage #n _sf 8 overhead symbols of the consecutive 4 superframes from the beginning of the superframe are transmitted, each superframe using 2 overhead symbols, respectively #N _offset Last overhead symbol sum # (N) in radio frame _offset +1) the last overhead symbol in the radio frame. Wherein, #N _sf Represents a superframe number, and #N _sf Is a multiple of 4; n (N) _offset A radio frame number indicating a start position of the broadcast information, and N _offset Transmitted by broadcasting information.

Symbol sequence d after broadcast information code modulation _i The mapping is performed in the order of first low frequency sub-carriers and then high frequency sub-carriers in each symbol in the time order of G symbols in the 8G symbols.

In summary, since the broadcast information uses #n _sf The 8 overhead symbols of the consecutive 4 superframes from the superframe are transmitted, and the time length of each superframe is 1ms, so that the period for transmitting the broadcast information is 4 superframes or 4ms, and each of the 4 superframes carries the broadcast information. However, since the content change speed of the broadcast information is not as fast as 4ms, a method in which the period of the broadcast information is 4ms is adopted To transmit broadcast information would result in excessive network overhead.

In conjunction with the above description, the embodiment of the present application provides a flow chart of a wireless communication method, please refer to fig. 3. The method comprises the following steps:

and S310, the management device sends broadcast information to the terminal on L system overhead symbols of continuous K superframes starting from the first superframe in the period of the broadcast channel.

Wherein K and L are integers.

In particular, the broadcast channel may be used to carry broadcast information.

It should be noted that the management device to terminal broadcast channel may be carried by the management device to terminal communication link and may be used to carry broadcast information. Second, in the embodiment of the present application, one superframe may include 48 radio frames, and one radio frame may include

The symbols are numbered #0, #1, …, # and->

Wherein for the case of a normal cyclic prefix: />

For the case of extended cyclic prefix: />

In addition, in the radio frame structure, the symbols used for overhead transmission are referred to as overhead symbols, and the overhead transmission includes physical layer control information transmission and partial physical layer signal transmission, and in the embodiment of the present application, the symbols are CP-OFDM symbols, which are specifically described in the above "physical layer" section, and are not described herein.

It should be further noted that, in the existing protocol standard, the period for transmitting the broadcast information is set to be 4 superframes or 4ms, and each superframe of the 4 superframes carries the broadcast information. However, since the content of the broadcast information is not changed as fast as 4ms, and the transmission of the broadcast information by using the period of the broadcast information as 4ms causes excessive network overhead, the embodiment of the present application introduces the period of the broadcast channel and takes the period of the broadcast channel as the period of the transmission of the broadcast information, thereby determining the time of the transmission of the broadcast information through the period of the broadcast channel. Compared with the mode that the period of the broadcast information is 4ms, the time for transmitting the broadcast information is determined by adopting the period of the broadcast channel, so that network overhead can be effectively reduced.

Specifically, in the embodiment of the present application, the value of K may be multiple of 4, 4 or other integers, and the value of L may be multiple of 8, 8 or other integers. It should be noted that, K and L in the embodiments of the present application may determine corresponding values according to different communication scenarios in the vehicle-mounted wireless short-range communication system, so as to ensure flexibility and diversity of the vehicle-mounted wireless short-range communication system.

Specifically, the period of the broadcast channel may be reconfigured by the system; alternatively, the period of the broadcast channel may be preconfigured by the system. It should be noted that, when the period of the configured broadcast channel of the vehicle-mounted wireless short-range communication system is a certain value, the vehicle-mounted wireless short-range communication system in the embodiment of the present application may reconfigure the period of the broadcast channel to another value according to different communication scenarios, so as to ensure flexibility and diversity of the vehicle-mounted wireless short-range communication system. Or, the vehicle-mounted wireless short-distance communication system in the embodiment of the application can pre-configure the period of the broadcast channel according to different communication scenes, so that the flexibility and diversity of the vehicle-mounted wireless short-distance communication system are ensured.

Specifically, the relative superframe number of the first superframe in the period of the broadcast channel may be J, which may be an integer. It should be noted that, since the period of the broadcast channel may include a plurality of superframes, in the embodiment of the present application, all the superframes in the period of the broadcast channel are numbered sequentially (e.g., #0, #1, …), so as to obtain the relative superframe number in the period of the broadcast channel. At this time, the relative superframe number of the first superframe in the period of the broadcast channel is J, which can be understood as the first superframe The frame is numbered J during the period of the broadcast channel. Meanwhile, J may be expressed as #N _sf 。

Further, the value of J may be a multiple of K. For example, the value of J may be 0, K, 2K, 3K, or the like. Note that, when all superframes in the period of the broadcast channel are numbered in order of #0, #1, …, if J is 0, the first superframe may be the 1 st superframe in the period of the broadcast channel; if J is K, the first superframe may be a (K+1) th superframe in a period of the broadcast channel; if J is 2K, the first superframe may be 2k+1 th superframe in the period of the broadcast channel, and so on.

Specifically, the period of the broadcast channel may be M milliseconds (ms), and the value of M may be an integer multiple of K.

It should be noted that, since the time length of each superframe in the embodiment of the present application is 1ms, the period of the broadcast channel is ms, which may be understood that the period of the broadcast channel may include M superframes, and the number of superframes may be an integer multiple of K. For example, when K is 4, the period of the broadcast channel may be 4ms, 8ms, 12ms, 16ms, 20ms, or the like. At this time, the period of the broadcast channel may include 4, 8, 12, 16, or 20 superframes.

In the following, in the embodiment of the present application, in the case where the period of the broadcast channel is M milliseconds, several ways of taking the value of J will be specifically described.

Mode 1:

the value of the J-mode M is a multiple of K, namely the following relation is satisfied:

mod (J, M) =a multiple of K;

where mod represents the modulo arithmetic symbol.

It should be noted that, when the period of the broadcast channel includes M superframes and M is an integer multiple of K, the embodiment of the present application numbers the M superframes in the period of the broadcast channel in order to obtain the relative superframe numbers in the period of the broadcast channel, that is, #0, #1, …, # M-1. Since J is a value of a relative superframe number in the period of the broadcast channel, the value of J needs to be smaller than the value of M. At this time, the value of J is a multiple of K, and it is understood that the value of J may be a multiple of K, so that the foregoing description is consistent, and details thereof will not be repeated.

Specifically, the relative superframe number within the broadcast channel may include superframe number j+k-1. It will be appreciated that the value of J needs to ensure that the superframe number J + K-1 remains within the relative superframe number within the broadcast channel.

The present embodiment will be described below by way of example of "mode 1".

Illustration 1: when the value of K is 4 and the value of M is 4*K, the period of the broadcast channel is 16ms. At this time, the period of the broadcast channel includes 16 superframes, and the 16 superframes are sequentially numbered to obtain relative superframe numbers, i.e., #0, #1, …, #15, in the period of the broadcast channel. Since the value of J modulo 16 is a multiple of 4 and the superframe number j+k-1 of J is still within the relative superframe number within the broadcast channel, the value of J may be 0, 4, 8, or 12 so that the first superframe may be considered as the 1 st superframe, 5 th superframe, 9 th superframe, or 13 th superframe within the period of the broadcast channel.

Illustration 2: when the value of K is 4 and the value of M is 5*K, the period of the broadcast channel is 20ms. At this time, the period of the broadcast channel includes 20 superframes, and the 20 superframes are sequentially numbered to obtain relative superframe numbers, i.e., #0, #1, …, #19, in the period of the broadcast channel. Since the value of J modulo 20 is a multiple of 4 and the superframe number j+k-1 of J is still within the relative superframe number within the broadcast channel, the value of J may be 0, 4, 8, 12, or 16 such that the first superframe may be considered as the 1 st superframe, 5 th superframe, 9 th superframe, 13 th superframe, or 17 th superframe within the period of the broadcast channel.

Mode 2:

the value of the J-mode M is a multiple of M/2, namely the following relation is satisfied:

mod (J, M) =multiple of M/2;

where mod represents the modulo arithmetic symbol.

It should be noted that, when the period of the broadcast channel includes M superframes and M is an integer multiple of K, the embodiment of the present application numbers the M superframes in the period of the broadcast channel in order to obtain the relative superframe numbers in the period of the broadcast channel, that is, #0, #1, …, # M-1. Since J is a value of a relative superframe number in the period of the broadcast channel, the value of J needs to be smaller than the value of M. At this time, the value of J modulo M is a multiple of K, and it is understood that the value of J may be a multiple of M/2.

Mode 2 will be exemplified in the following present embodiment.

Illustration 1: when K has a value of 4 and M has a value of 4*K, the period of the broadcast channel is 16ms, and the relative superframe numbers, i.e., #0, #1, …, #15, within the period of the broadcast channel are obtained. Since the value of J modulo 16 is a multiple of 8 and the superframe number j+k-1 of J is still within the relative superframe number within the broadcast channel, the value of J may be 0 or 8 so that the first superframe may be considered as the 1 st superframe or 9 th superframe within the period of the broadcast channel.

Illustration 2: when K has a value of 4 and M has a value of 5*K, the period of the broadcast channel is 20ms, and the relative superframe numbers, i.e., #0, #1, …, #19, within the period of the broadcast channel are obtained. Since the value of J modulo 20 is a multiple of 10 and the superframe number j+k-1 of J is still within the relative superframe number within the broadcast channel, the value of J may be 0 or 10 so that the first superframe may be considered as the 1 st superframe or 11 th superframe within the period of the broadcast channel.

Mode 3:

the value of J modulo M is a multiple of K+i, wherein i is {0,1, …, K-1}, namely the following relation is satisfied:

mod (J, M) =multiple of k+i;

where mod represents the modulo arithmetic symbol.

It should be noted that, when the period of the broadcast channel includes M superframes and M is an integer multiple of K, the embodiment of the present application numbers the M superframes in the period of the broadcast channel in order to obtain the relative superframe numbers in the period of the broadcast channel, that is, #0, #1, …, # M-1. Since J is a value of a relative superframe number in the period of the broadcast channel, the value of J needs to be smaller than the value of M. At this time, the value of J modulo M is a multiple of k+i, and it is understood that the value of J may be a multiple of k+i. When i=0, "mode 3" corresponds to the technical scheme in "mode 1" described above, and a detailed description thereof will be omitted.

Mode 3 will be exemplified in the following present embodiment.

Illustration 1: when K has a value of 4 and M has a value of 4*K, the period of the broadcast channel is 16ms, and the relative superframe numbers, i.e., #0, #1, …, #15, within the period of the broadcast channel are obtained. Since the value of J modulo 16 is a multiple of 4+i and the superframe number j+k-1 of J is still within the relative superframe number within the broadcast channel, the value of J may be 1, 5, or 9 when i=1; when i=2, the value of J may be 2, 6 or 10; when i=3, J may take a value of 3, 7 or 11.

Illustration 2: when K has a value of 4 and M has a value of 5*K, the period of the broadcast channel is 20ms, and the relative superframe numbers, i.e., #0, #1, …, #19, within the period of the broadcast channel are obtained. Since the value of J modulo 20 is a multiple of 4+i and the superframe number j+k-1 of J is still within the relative superframe number within the broadcast channel, the value of J may be 1, 5, 9, or 13 when i=1; when i=2, J may take a value of 2, 6, 10 or 14; when i=3, J may take the value of 3, 7, 11 or 15.

In summary, the value of J-mode M satisfies the following manner: the value of the J mode M is a multiple of K, the value of the J mode M is a multiple of M/2, and the value of the J mode M is a multiple of K+i; where i ε {0,1, …, K-1}. Therefore, the value of the J module M meets different modes, so that the value of different J is determined, the time of different broadcast information transmission can be determined, and the flexibility and diversity of the vehicle-mounted wireless short-distance communication system are ensured.

The following embodiments of the present application specifically describe L overhead symbols.

Specifically, if K has a value of 4 and L has a value of 8, the L overhead symbols consist of 2 overhead symbols for each of the K superframes. It will be appreciated that the present embodiment transmits broadcast information by 8 overhead symbols consisting of 2 overhead symbols per each of the consecutive 4 superframes beginning in the first superframe.

Further, the 2 overhead symbols of each of the K superframes may include a last overhead symbol in a P-th radio frame in each of the K superframes and a last overhead symbol in a p+1th radio frame in each of the K superframes, where P is an integer. It will be appreciated that since one superframe contains 48 radio frames, the present application implements the transmission of broadcast information through the last overhead symbol in the P-th radio frame in each superframe and the last overhead symbol in the p+1th radio frame in each superframe.

Further, the P-th radio frame is a radio frame where the start position of the broadcast information is located. It is understood that the radio frame number corresponding to the P-th radio frame can be regarded as #N _offset I.e. the radio frame number where the start position of the broadcast information is located.

Further, N _offset The value of (2) is transmitted through broadcast information.

S320, the terminal receives the broadcast information from the management device.

Wherein the broadcast information is transmitted over L overhead symbols of consecutive K superframes starting in the first superframe in the period of the broadcast channel.

The above description of the solution of the embodiment of the present application is mainly presented from the point of interaction between the network elements in the method side. It will be appreciated that, in order to achieve the above-mentioned functions, the terminal includes corresponding hardware structures and/or software modules for performing the respective functions. Those of skill in the art will readily appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Those skilled in the art may implement the described functionality using different approaches for each particular application, but such implementation is not to be considered as outside the scope of this application.

The embodiment of the application may divide the functional units of the terminal according to the above method example, for example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated in one processing unit. The integrated units described above may be implemented either in hardware or in software program modules. It should be noted that, in the embodiment of the present application, the division of the units is schematic, but only one logic function is divided, and another division manner may be implemented in actual implementation.

In the case of integrated units, fig. 4 provides a functional unit block diagram of a wireless communication device. The wireless communication device 400 is applied to a terminal in a vehicle-mounted wireless short-range communication system, and specifically includes: a processing unit 402 and a communication unit 403. The processing unit 402 is configured to control and manage actions of the terminal, for example, the processing unit 402 is configured to support the terminal to perform part of the steps in fig. 3 and other processes for the technical solutions described in the present application. The communication unit 403 is used to support communication between the terminal and other devices in the vehicle-mounted wireless short-range communication system. The wireless communication apparatus 400 may further include a storage unit 401 for storing program codes and data of the terminal.

The processing unit 402 may be a processor or a controller, and may be, for example, a central processing unit (central processing unit, CPU), a general purpose processor, a digital signal processor (digital signal processor, DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (field programmable gate array, FPGA), or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various exemplary logical blocks, modules, and circuits described in connection with the present disclosure. The processing unit 402 may also be a combination implementing computing functions, e.g., comprising one or more microprocessor combinations, a combination of a DSP and a microprocessor, etc. The communication unit 403 may be a communication interface, a transceiver circuit, or the like, and the storage unit 401 may be a memory. When the processing unit 402 is a processor, the communication unit 403 is a communication interface, and the storage unit 401 is a memory, the wireless communication apparatus 400 according to the embodiment of the present application may be a terminal shown in fig. 6.

In particular implementation, the processing unit 402 is configured to perform any step performed by the terminal in the above method embodiment, and when performing data transmission such as sending, the communication unit 403 is optionally invoked to complete a corresponding operation. The following is a detailed description.

The processing unit 402 is configured to: broadcast information from the management device is received, the broadcast information being transmitted over L overhead symbols of consecutive K superframes starting in a first superframe in a period of the broadcast channel, K and L being integers.

In one possible example, the relative superframe number of the first superframe during the period of the broadcast channel is J, which is an integer.

In one possible example, J takes a multiple of K.

In one possible example, the period of the broadcast channel is M milliseconds, and the value of M is an integer multiple of K.

In one possible example, the value of J-mode M satisfies one of the following: the value of the J mode M is a multiple of K, the value of the J mode M is a multiple of M/2, and the value of the J mode M is a multiple of K+i; where i ε {0,1, …, K-1}.

In one possible example, the relative superframe number within the broadcast channel includes superframe number j+k-1.

In one possible example, the period of the broadcast channel is reconfigured by the system; alternatively, the period of the broadcast channel is preconfigured by the system.

In one possible example, a broadcast channel is used to carry the broadcast information.

In the case of an integrated unit, fig. 5 provides a functional unit block diagram of yet another wireless communication device. The wireless communication device 500 is applied to management equipment in a vehicle-mounted wireless short-range communication system, and specifically includes: a processing unit 502 and a communication unit 503. The processing unit 502 is configured to control and manage actions of the management device, for example, the processing unit 502 is configured to support the management device to perform part of the steps in fig. 3 and other processes for the technical solutions described in the present application. The communication unit 503 is used to support communication between the management device and other devices in the in-vehicle wireless short-range communication system. The wireless communication apparatus 500 may further comprise a storage unit 501 for storing program code and data of the management device.

The processing unit 502 may be a processor or controller, for example, CPU, DSP, ASIC, FPGA or other programmable logic device, transistor logic device, hardware component, or any combination thereof. Which may implement or perform the various exemplary logical blocks, modules, and circuits described in connection with the present disclosure. The processing unit 502 can also be a combination of computing functions, e.g., comprising one or more microprocessor combinations, a combination of a DSP and a microprocessor, etc. The communication unit 503 may be a communication interface, a transceiver circuit, etc., and the storage unit 501 may be a memory. When the processing unit 502 is a processor, the communication unit 503 is a communication interface, and the storage unit 501 is a memory, the wireless communication apparatus 500 according to the embodiment of the present application may be a management device shown in fig. 7.

In particular implementation, the processing unit 502 is configured to perform any of the steps performed by the management device in the above-described method embodiments, and when performing data transmission such as sending, the communication unit 503 is optionally invoked to complete the corresponding operation. The following is a detailed description.

The processing unit 502 is configured to: broadcast information is transmitted to the terminal over L overhead symbols of consecutive K superframes beginning in the first superframe in the period of the broadcast channel, K and L being integers.

In one possible example, J takes a multiple of K.

Referring to fig. 6, fig. 6 is a schematic structural diagram of a terminal according to an embodiment of the present application. The terminal 600 includes a processor 610, a memory 620, a communication interface 630, and at least one communication bus for connecting the processor 610, the memory 620, and the communication interface 630.

Memory 620 includes, but is not limited to, random access memory (random access memory, RAM), read-only memory (ROM), erasable programmable read-only memory (erasable programmable eead only memory, PROM), or portable read-only memory (compact disc read-only memory, CD-ROM), with memory 620 for associated instructions and data.

The communication interface 630 is used to receive and transmit data.

The processor 610 may be one or more CPUs, and in the case where the processor 610 is one CPU, the CPU may be a single core CPU or a multi-core CPU.

The processor 610 in the terminal 600 is configured to read one or more programs 1521 stored in the memory 620, and perform the following operations: broadcast information from the management device is received, the broadcast information being transmitted over L overhead symbols of consecutive K superframes starting in a first superframe in a period of the broadcast channel, K and L being integers.

It should be noted that, the specific implementation of each operation may be described in the foregoing corresponding description of the method embodiment shown in fig. 3, and the terminal 600 may be used to execute the method on the terminal side in the foregoing method embodiment of the present application, which is not described herein in detail.

Referring to fig. 7, fig. 7 is a schematic structural diagram of a management device according to an embodiment of the present application. Wherein the management device 700 comprises a processor 710, a memory 720, a communication interface 730 and at least one communication bus for connecting the processor 710, the memory 720, the communication interface 730.

Memory 720 includes, but is not limited to, RAM, ROM, PROM or CD-ROM, which memory 720 is used to store related instructions and data.

Communication interface 730 is used to receive and transmit data.

Processor 710 may be one or more CPUs, which may be a single core CPU or a multi-core CPU in the case where processor 710 is a single CPU.

The processor 710 in the management device 700 is configured to read one or more programs 721 stored in the memory 720, and perform the following operations: broadcast information is transmitted to the terminal over L overhead symbols of consecutive K superframes beginning in the first superframe in the period of the broadcast channel, K and L being integers.

It should be noted that, the specific implementation of each operation may be described in the foregoing corresponding description of the method embodiment shown in fig. 3, and the management device 700 may be used to execute the method on the management device side of the foregoing method embodiment of the present application, which is not described herein in detail.

The embodiment of the application also provides a chip, wherein the chip comprises a processor, and the processor is used for calling and running a computer program from a memory, so that a device installed with the chip executes part or all of the steps described by the terminal or the management device in the embodiment of the method.

The embodiment of the application also provides a computer readable storage medium, wherein the computer readable storage medium stores a computer program for electronic data exchange, and the computer program makes a computer execute part or all of the steps described by a terminal or a management device in the embodiment of the method.

Embodiments of the present application also provide a computer program product, wherein the computer program product comprises a computer program operable to cause a computer to perform some or all of the steps described by a terminal or a management device in the above-described method embodiments. The computer program product may be a software installation package.

The steps of a method or algorithm described in the embodiments of the present application may be implemented in hardware, or may be implemented by executing software instructions by a processor. The software instructions may be comprised of corresponding software modules that may be stored in RAM, flash memory, ROM, erasable programmable read-only memory (erasable programmable ROM, EPROM), electrically erasable programmable read-only memory (EEPROM), registers, hard disk, a removable disk, a compact disc read-only memory (CD-ROM), or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC. In addition, the ASIC may reside in a terminal or management device. It is also possible that the processor and the storage medium reside as discrete components in a terminal or management device.

Those of skill in the art will appreciate that in one or more of the above examples, the functions described in the embodiments of the present application may be implemented, in whole or in part, in 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, produces a flow or function in accordance with embodiments of the present application, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. 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 by a wired (e.g., coaxial cable, fiber optic, digital subscriber line (digital subscriber line, DSL)), or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a digital video disc (digital video disc, DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), or the like.

The foregoing embodiments have been provided for the purpose of illustrating the embodiments of the present application in further detail, and it should be understood that the foregoing embodiments are merely illustrative of the embodiments of the present application and are not intended to limit the scope of the embodiments of the present application, and any modifications, equivalents, improvements, etc. made on the basis of the technical solutions of the embodiments of the present application are included in the scope of the embodiments of the present application.

Claims

1. A method of wireless communication, comprising:

2. The method of claim 1, wherein the relative superframe number of the first superframe during the period of the broadcast channel is J, the J being an integer.

3. The method of claim 2, wherein J is a multiple of K.

4. A method according to claim 2 or 3, wherein the period of the broadcast channel is M milliseconds, and the value of M is an integer multiple of K.

5. The method of claim 4, wherein the J-mode value of M satisfies one of the following: the value of M of the J mode is a multiple of K, the value of M of the J mode is a multiple of M/2, and the value of M of the J mode is a multiple of K+i; wherein, i is {0,1, …, K-1}.

6. The method of claim 5, wherein the relative superframe number within the broadcast channel comprises a superframe number j+k-1.

7. The method of claim 1, wherein the period of the broadcast channel is reconfigured by the system; alternatively, the period of the broadcast channel is preconfigured by the system.

8. The method of claim 1, wherein the broadcast channel is used to carry the broadcast information.

9. A method of wireless communication, comprising:

10. The method of claim 9, wherein the relative superframe number of the first superframe during the period of the broadcast channel is J, the J being an integer.

11. The method of claim 10, wherein J is a multiple of K.

12. The method according to claim 10 or 11, wherein the period of the broadcast channel is M milliseconds, and the value of M is an integer multiple of K.

13. The method of claim 12, wherein the J-mode value of M satisfies one of the following: the value of M of the J mode is a multiple of K, the value of M of the J mode is a multiple of M/2, and the value of M of the J mode is a multiple of K+i; wherein, i is {0,1, …, K-1}.

14. The method of claim 13, wherein the relative superframe number within the broadcast channel comprises a superframe number j+k-1.

15. The method of claim 9, wherein the period of the broadcast channel is reconfigured by the system; alternatively, the period of the broadcast channel is preconfigured by the system.

16. The method of claim 9, wherein the broadcast channel is used to carry the broadcast information.

17. A wireless communication device, characterized by being applied to a terminal; the device comprises a processing unit and a communication unit, wherein the processing unit is used for:

18. A wireless communication apparatus characterized by being applied to a management device; the device comprises a processing unit and a communication unit, wherein the processing unit is used for:

19. A terminal comprising a processor, a memory, a communication interface, and one or more programs stored in the memory and configured to be executed by the processor, the programs comprising instructions for performing the steps in the method of any of claims 1-8.

20. A management device comprising a processor, a memory, a communication interface, and one or more programs stored in the memory and configured to be executed by the processor, the programs comprising instructions for performing the steps in the method of any of claims 9-16.

21. A computer-readable storage medium, characterized in that it stores a computer program for electronic data exchange, wherein the computer program causes a computer to perform the method according to any one of claims 1-8 or 9-16.