CN111372298B - Wireless access method, device, equipment and storage medium - Google Patents
Wireless access method, device, equipment and storage medium Download PDFInfo
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- CN111372298B CN111372298B CN202010123385.6A CN202010123385A CN111372298B CN 111372298 B CN111372298 B CN 111372298B CN 202010123385 A CN202010123385 A CN 202010123385A CN 111372298 B CN111372298 B CN 111372298B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
- H04W48/10—Access restriction or access information delivery, e.g. discovery data delivery using broadcasted information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0602—Systems characterised by the synchronising information used
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0078—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
- H04L1/0083—Formatting with frames or packets; Protocol or part of protocol for error control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/003—Arrangements to increase tolerance to errors in transmission or reception timing
Abstract
The embodiment of the invention discloses a wireless access method, a device, equipment and a storage medium, wherein the method comprises the following steps: performing time and frequency synchronization with a network to be accessed according to the synchronization information in the current subframe, wherein the equipment and the network to be accessed adopt the same network frame structure for communication; acquiring head symbol information in a current subframe, and determining a first position of the current subframe in a network frame structure according to the head symbol information; determining a second position of the system broadcast channel time slice in the network frame structure according to the first position; and receiving the broadcast information of the system broadcast channel time slice at the second position in a timing mode, and accessing the network to be accessed according to the broadcast information. Under the condition that the synchronization information in the current frame is kept synchronous with the network to be accessed, the position of the system broadcasting time slice is accurately determined by acquiring the header symbol information in the current frame, and the accurate network access of the equipment is completed by using the acquired broadcasting information at the determined position, so that the communication quality is improved and the communication requirement of a user is met.
Description
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to a wireless access method, a wireless access device, wireless access equipment and a storage medium.
Background
With the development of communication technology, the demand for network transmission quality is increasing, and when network communication is performed, a radio frame structure is usually involved, for example, in ad hoc network, emergency communication or internet of things application, and the radio frame structure is used for network access.
When the current equipment performs network access, access is generally performed according to a network frame structure with a single structure, but the access mode is limited by the number of the access equipment, and the access accuracy of the network is not high due to the limitation of the unicity of the network frame structure, so that the requirement of a user on the communication quality is influenced.
Disclosure of Invention
The embodiment of the invention provides a wireless access method, a wireless access device, wireless access equipment and a storage medium. Therefore, the equipment can be accurately accessed to the network, and the communication quality is improved.
In a first aspect, an embodiment of the present invention provides a wireless access method, applied to a device, including:
performing time and frequency synchronization with a network to be accessed according to the synchronization information in the current subframe, wherein the equipment and the network to be accessed adopt the same network frame structure for communication;
acquiring head symbol information in a current subframe, and determining a first position of the current subframe in a network frame structure according to the head symbol information, wherein the network frame structure comprises a system broadcast channel time slice, an access channel time slice, a service channel time slice, a management channel time slice and a response channel time slice;
determining a second position of the system broadcast channel time slice in the network frame structure according to the first position;
and receiving the broadcast information of the system broadcast channel time slice at the second position in a timing mode, and accessing the network to be accessed according to the broadcast information.
In a second aspect, an embodiment of the present invention provides a wireless access apparatus, including:
the synchronization module is used for carrying out time and frequency synchronization with a network to be accessed according to the synchronization information in the current subframe, wherein the equipment and the network to be accessed adopt the same network frame structure for communication;
the position determining module of the current subframe is used for acquiring head symbol information in the current subframe and determining a first position of the current subframe in a network frame structure according to the head symbol information, wherein the network frame structure comprises a system broadcast channel time slice, an access channel time slice, a service channel time slice, a management channel time slice and a response channel time slice;
a system broadcast channel time slice position determining module for determining a second position of the system broadcast channel time slice in the network frame structure according to the first position;
and the access module is used for regularly receiving the broadcast information of the system broadcast channel time slice at the second position and accessing the network to be accessed according to the broadcast information.
In a third aspect, an embodiment of the present invention provides an apparatus, including:
one or more processors;
storage means for storing one or more programs;
when executed by the one or more processors, cause the one or more processors to implement a wireless access method.
In a fourth aspect, an embodiment of the present invention provides a computer storage medium having a computer program stored thereon, where the computer program is executed by a processor to implement a wireless access method.
According to the technical scheme of the embodiment of the invention, under the condition that the synchronization information in the current frame is kept synchronous with the network to be accessed, the position of the system broadcasting time slice is accurately determined by acquiring the header symbol information in the current frame, and the accurate network access of the equipment is completed by using the acquired broadcasting information at the determined position, so that the communication quality is improved and the communication requirement of a user is met.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a flowchart of a wireless access method according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a network frame structure according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a network frame structure according to an embodiment of the present invention;
FIG. 4 is a diagram of subframes with different lengths according to an embodiment of the present invention;
fig. 5 is a flowchart of a wireless access method according to a second embodiment of the present invention;
fig. 6 is a schematic view of a scenario of an ad hoc network according to a second embodiment of the present invention;
fig. 7 is a schematic structural diagram of a wireless access device according to a third embodiment of the present invention;
fig. 8 is a schematic structural diagram of an apparatus according to a fourth embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a flowchart of a radio access method according to an embodiment of the present invention, where this embodiment is applicable to a case where a device accesses an ad hoc network, and the method may be executed by a radio access apparatus according to an embodiment of the present invention, where the apparatus may be implemented in a software and/or hardware manner. As shown in fig. 1, the method specifically includes the following operations:
and 101, synchronizing time and frequency with a network to be accessed according to the synchronization information in the current subframe.
The device and the network to be accessed communicate by adopting the same network frame structure, and only then can the device be accessed into the network to be accessed.
Optionally, before performing time and frequency synchronization with the network to be accessed according to the synchronization information in the current subframe, the method may further include: determining that the current subframe is located within an active time of a network scheduling period, wherein the active time is indicated for network communication.
Specifically, the network frame structure in this embodiment is formed by adjacently arranging a plurality of different types of time slots, and the types of the time slots include a system broadcast channel time slot, an access channel time slot, a traffic channel time slot, a management channel time slot, a response channel time slot, and a non-network-belonging time slot, where the non-network-belonging time slot may be used as a network resource for other subnets to communicate. And the network frame structure is located within an active time of the network scheduling period, wherein the active time is indicative of a time for network communication.
It should be noted that, in the present embodiment, each time slice of a channel is composed of a plurality of subframes, and each subframe includes synchronization information, header symbol information, inter-frame spacers, cyclic prefixes and symbols, while the length of each subframe includes 1/4 time units, 1/2 time units or 1 time unit, the length of the subframe may be divided into a plurality of lengths, so that when the network frame structure is used for network communication, different lengths may be selected according to network load conditions, thereby having greater network node capacity and higher radio resource utilization rate. In the present embodiment, the length per time unit is exemplified as 1ms, but the specific length per time unit is not limited.
As shown in fig. 2, a schematic diagram of a network frame structure adopted by a device and a network to be accessed in the embodiment of the present application is shown, where a network scheduling period includes an active time and an inactive time, the active time is indicated for performing network communication, and the device may sleep during the inactive time to save energy consumption. And includes a plurality of network frame structures within the active time, each network frame structure being formed of a plurality of different types of channel time slices arranged adjacently. And the types of the channel time slices include a system broadcast channel time slice, an access channel time slice, a traffic channel time slice, a management channel time slice and a response channel time slice, but the embodiment of the present application does not limit the arrangement order of the different types of channel time slices in the network frame structure, and is within the protection scope of the present application as long as the network communication can be supported.
In a specific implementation, as shown in fig. 3, a schematic diagram of a network frame structure in this embodiment is a schematic diagram of a network frame structure with a radio spectrum of 20MHz and a baseband sampling rate of 30.72MHz, where a length of the network frame structure in this embodiment is 50 time units, and an arrangement sequence of different types of channel time slices is respectively: the head of the network frame structure is a system broadcast channel time slice with the length of 1 time unit, the system broadcast channel time slice is used for broadcasting the information of the wireless network and the required physical layer information to be accessed to the wireless network, and the system broadcast channel time slice is followed by an access channel time slice with the length of 1 time unit; followed by a traffic channel time slice of length 4 time units, followed by a management channel time slice of length 4 time units; followed by a management channel time slice of length 4 time units; then a traffic channel time slice with a length of 4 time units; then a response channel time slice with the length of 1 time unit; then, the time slices of the traffic channel are followed, but the number of the time slices of the traffic channel at the moment is distributed according to the actual requirement of the network, and the length is determined according to the actual situation; and finally, the channel time slices that do not belong to the network. It is to be understood that this embodiment is merely an example, and does not limit the specific arrangement order of different types of time slots. The system broadcast channel time slice is composed of a subframe with the length of 1 time unit, and the type of the subframe is a broadcast frame specifically; the access channel time slice is composed of 4 subframes with the length of 1/4 time units, and the type of the subframes is specifically a random access frame and is represented by a letter RACH; the management channel time slice is composed of 16 subframes with the length of 1/4 time units, and the type of the subframe is specifically a management service frame and is indicated by a letter MCH; the response channel time slice is composed of 4 subframes with the length of 1/4 time units, and the type of the subframe is specifically a response service frame and is indicated by letter ACK; the length of the sub-frame constituting the traffic channel time slice may be configured according to actual needs, for example, 1/4 time unit, 1/2 time unit, or 1 time unit, and the specific length of the sub-frame constituting the traffic channel time slice is not limited in the embodiments of the present application.
Specifically, as shown in fig. 4, a schematic diagram of subframes with different lengths provided by the embodiment of the present application is provided, where the subframes with 1/4 time units, 1/2 time units, and 1 time unit length all include: inter-frame spacers, denoted by the letter GI; short synchronization sequences, denoted by the letter t; a long synchronization sequence, denoted by the letter T; cyclic prefix, denoted by the letter CP; header symbol information, denoted by the letters HDR; and symbols, denoted by the letter S. The inter-frame space character GI is specifically used for radio frequency transceiving and switching stable protection, and is composed of 512 points, and the length of each point is 1/30.72 us; the number of the short synchronization sequences is four, specifically, the first two short synchronization sequences are used for Automatic Gain Control (AGC) of a receiver, the last two short synchronization sequences are used for initial frequency offset estimation, and each short synchronization sequence is composed of a 128-point constant envelope Zero Auto-correlation (CAZAC) sequence; the long synchronization sequence is specifically used for fine frequency offset estimation and channel estimation and is composed of a constant envelope zero autocorrelation sequence CAZAC of 1024 points; the cyclic prefix is positioned in front of the long synchronization sequence, is specifically used for resisting interference and consists of 512 points; header symbol information, which is specifically used for transmitting physical layer parameters, such as frame length, frame position, modulation mode, Multiple Input Multiple Output (MIMO) format, modulation coding format, destination node, and the like; the symbol is used for indicating information such as time frequency or audio frequency of transmission and is composed of a cyclic prefix of 512 points and symbol data of 2048 points. And the numbers of symbols contained in the 1/4 time unit, 1/2 time unit and 1 time unit subframes with different lengths are different, the 1/4 time unit subframe contains one symbol, the 1/2 time unit subframe contains 4 symbols, and the 1 time unit subframe contains 10 symbols.
It should be noted that the current subframe in this embodiment may be a subframe in any time slice in the network frame structure shown in fig. 3, and the specific position of the current subframe in the network frame structure is not limited in this embodiment. Moreover, the synchronization information in this embodiment includes short synchronization information and long synchronization information, so that performing time and frequency synchronization with the network to be accessed according to the synchronization information in the current subframe may include: and carrying out time and frequency synchronization with the network to be accessed according to the short synchronization sequence and the long synchronization sequence in the current subframe, thereby ensuring that the equipment and the network to be accessed are under the same clock frequency.
Specifically, as shown in fig. 3, it is determined that the network frame structure is specifically as shown, assuming that the current subframe is MCH0, and MCH0 adopts a subframe with a length of 1/4 time units, header symbol information HDR in the MCH0 subframe with a length of 1/4 time units is obtained, and since the header symbol information includes information such as a frame position, a specific position of the current subframe in the network frame structure shown in fig. 3 can be obtained by analyzing the header symbol information, and specifically, the position is that the current subframe MCH0 is located at a position of 6 time units in the network frame structure, and a position of 6 time units in the network frame structure is taken as a first position. Of course, this embodiment is described by way of example only with the MCH0, and does not limit the specific type of the current subframe.
Specifically, since the network frame structure is known, after the first position of the current subframe in the network frame structure is determined, the second position of the system broadcast channel time slice in the network frame structure can be determined according to the known network frame structure and the first position of the current subframe, for example, the first position of the current subframe MCH0 in the network frame structure is 6 time units, while as can be seen from fig. 3, when the current subframe MCH0 is 6 time units apart from the system broadcast channel time slice, the second position of the broadcast channel time slice in the network frame structure is determined to be 6 time units before the current subframe MCH0 and is taken as the second position.
And 104, receiving the broadcast information of the system broadcast channel time slice at the second position at fixed time, and accessing the network to be accessed according to the broadcast information.
Optionally, accessing the network to be accessed according to the broadcast information may include: acquiring connection parameters of a network to be accessed according to the broadcast information; sending an access request on an access channel time slice according to the connection parameters; and detecting on the management channel time slice, and after determining that a response aiming at the access request is received, responding on the response channel time slice to determine to access the network to be accessed.
Specifically, after the position of the system broadcast channel time slice is determined according to the position of the current subframe, when the next period comes, the broadcast information may be received at the determined second position at a fixed time, the broadcast information includes connection parameters of the network to be accessed, and the access request is sent on the access channel time slice according to the acquired connection parameters, for example, the access request is sent on the subframe RACH0 of the access channel time slice, the management channel time slice is monitored after the request is sent, and detection is performed on the management channel time slice, for example, after a response of the network for the access request is received on the subframe MCH0 of the management channel time slice, the response is performed on a response channel time slice, for example, ACK0, so as to determine that the access network is successful.
It should be noted that when multiple devices initiate access requests in an access channel time slice of the same network frame structure, collision may occur to cause unsuccessful access, and therefore, the devices may randomly select a subframe RACH on the access channel time slice to reduce the probability of collision, and in the case of determining access failure, a random fallback manner is adopted to further reduce the probability of collision.
According to the technical scheme of the embodiment of the invention, under the condition that the synchronization information in the current frame is kept synchronous with the network to be accessed, the position of the system broadcasting time slice is accurately determined by acquiring the header symbol information in the current frame, and the accurate network access of the equipment is completed by using the acquired broadcasting information at the determined position, so that the communication quality is improved and the communication requirement of a user is met.
Example two
Fig. 5 is a flowchart of a wireless access method according to a second embodiment of the present invention, where the present embodiment is based on the foregoing embodiment, and after accessing a network to be accessed according to broadcast information, the present embodiment further includes: acquiring communication resources; and communicating in the network to be accessed according to the communication resources. Correspondingly, the method of the embodiment specifically includes the following steps:
And step 204, regularly receiving the broadcast information of the system broadcast channel time slice at the second position, and accessing the network to be accessed according to the broadcast information.
Specifically, the network to be accessed in the embodiment of the present application may include an ad hoc network, and as shown in fig. 6, is a scene schematic diagram of the ad hoc network after a device accesses the ad hoc network, where each node device, terminal device, and gateway center are in one network environment, the device accessing in the embodiment may be any node device or terminal device in an ad hoc network scene, and the node device has a relay function, and the type of the terminal device includes an intercom or a data acquisition device, for example, the device accessing may specifically be the node device 2 shown in fig. 6, and the specific type of the device accessing is not limited in the embodiment.
Specifically, after accessing the ad hoc network, if there is a communication requirement, when sending an access request to an access channel time slice, the node device 2 includes identification information of a communication resource required for the node device 2 to perform communication in the access request, and receives a communication resource fed back by the ad hoc network according to the identification information, for example, a first subframe in a network frame structure shown in fig. 3 is used as the communication resource required for performing communication.
And step 206, performing communication in the network to be accessed according to the communication resources.
Specifically, in the present embodiment, when performing communication in the network to be accessed according to the communication resource, the radio resource management configuration mode is applied, including a polite mode and a non-polite mode. For example, after the node device 2 is accessed to the ad hoc network as an access device, it needs to perform communication in the ad hoc network, and needs to use the first subframe in the network frame structure as a communication resource required for performing communication, and the communication method in the polite mode is as follows: when the communication resource is determined to be used by other nodes and conflict occurs, the communication resource is abandoned, and the conflict-free communication resource is reselected for communication; the communication mode in the non-polite mode is as follows: and when the communication resource is determined to be used by other nodes and conflict occurs, initiating a forcing request, and forcibly adopting the communication resource for communication by interrupting the communication of the conflict node.
It should be noted that, after accessing the network to be accessed according to the broadcast information, the method may further include: performing network detection at regular time to obtain a detection result, wherein the detection result comprises a collision with a network within a preset distance range and a non-collision with the network within the preset distance range; and when the collision with the network within the preset distance range is determined, network switching or network fusion is carried out.
For example, after the node device 2 accesses the network to be accessed according to the broadcast information, network detection is performed at regular time to determine that the strength of the synchronization signal of the neighboring cell exceeds a preset threshold, a new network is detected, it is considered that network collision occurs, and at this time, the node device 2 initiates a network switching request and performs network switching; when all the nodes in the ad hoc network in which the node device 2 is located detect a new network, the original ad hoc network and the new network are merged to obtain a recombined network with a larger node accommodation range.
EXAMPLE III
Fig. 7 is a wireless access apparatus according to a third embodiment of the present invention, where the apparatus includes: a synchronization module 310, a current subframe location determination module 320, a system broadcast channel time slice location determination module 330, and an access module 340.
A synchronization module 310, configured to perform time and frequency synchronization with a network to be accessed according to synchronization information in a current subframe, where the device and the network to be accessed communicate using a same network frame structure;
a current subframe position determining module 320, configured to obtain header symbol information in a current subframe, and determine a first position of the current subframe in a network frame structure according to the header symbol information, where the network frame structure includes a system broadcast channel time slice, an access channel time slice, a service channel time slice, a management channel time slice, and an acknowledgement channel time slice;
a system broadcast channel time slice position determining module 330, configured to determine a second position of the system broadcast channel time slice in the network frame structure according to the first position;
the access module 340 is configured to receive the broadcast information of the system broadcast channel time slice at the second location at regular time, and access the network to be accessed according to the broadcast information.
The device can execute the wireless access method provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method. For technical details that are not described in detail in this embodiment, reference may be made to the radio access method provided in any embodiment of the present invention.
Example four
Fig. 8 is a schematic structural diagram of an apparatus according to an embodiment of the present invention. FIG. 8 illustrates a block diagram of an exemplary device 412 suitable for use in implementing embodiments of the present invention. The device 412 shown in fig. 8 is only an example and should not impose any limitation on the functionality or scope of use of embodiments of the present invention.
As shown in FIG. 8, device 412 is in the form of a general purpose computing device. The components of device 412 may include, but are not limited to: one or more processors 416, a memory 428, and a bus 418 that couples the various system components (including the memory 428 and the processors 416).
The memory 428 is used to store instructions. Memory 428 can include computer system readable media in the form of volatile memory, such as Random Access Memory (RAM)430 and/or cache memory 432. The device 412 may further include other removable/non-removable, volatile/nonvolatile computer system storage media. By way of example only, storage system 434 may be used to read from and write to non-removable, nonvolatile magnetic media (not shown in FIG. 8, and commonly referred to as a "hard drive"). Although not shown in FIG. 8, a magnetic disk drive for reading from and writing to a removable, nonvolatile magnetic disk (e.g., a "floppy disk") and an optical disk drive for reading from or writing to a removable, nonvolatile optical disk (e.g., a CD-ROM, DVD-ROM, or other optical media) may be provided. In these cases, each drive may be connected to bus 418 by one or more data media interfaces. Memory 428 can include at least one program product having a set (e.g., at least one) of program modules that are configured to carry out the functions of embodiments of the invention.
A program/utility 440 having a set (at least one) of program modules 442 may be stored, for instance, in memory 428, such program modules 442 including, but not limited to, an operating system, one or more application programs, other program modules, and program data, each of which examples or some combination thereof may comprise an implementation of a network environment. The program modules 442 generally perform the functions and/or methodologies of the described embodiments of the invention.
The device 412 may also communicate with one or more external devices 414 (e.g., keyboard, pointing device, display 424, etc.), with one or more devices that enable a user to interact with the device 412, and/or with any devices (e.g., network card, modem, etc.) that enable the device 412 to communicate with one or more other computing devices. Such communication may occur via input/output (I/O) interfaces 422. Also, the device 412 may communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network, such as the internet) through the network adapter 420. As shown, network adapter 420 communicates with the other modules of device 412 over bus 418. It should be appreciated that although not shown in FIG. 8, other hardware and/or software modules may be used in conjunction with device 412, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, among others.
The processor 416 executes instructions stored in the memory 428 to perform various functional applications and data processing, such as implementing the wireless access method provided by the embodiments of the present invention: performing time and frequency synchronization with a network to be accessed according to the synchronization information in the current subframe, wherein the equipment and the network to be accessed adopt the same network frame structure for communication; acquiring head symbol information in a current subframe, and determining a first position of the current subframe in a network frame structure according to the head symbol information, wherein the network frame structure comprises a system broadcast channel time slice, an access channel time slice, a service channel time slice, a management channel time slice and a response channel time slice; determining a second position of the system broadcast channel time slice in the network frame structure according to the first position; and receiving the broadcast information of the system broadcast channel time slice at the second position in a timing mode, and accessing the network to be accessed according to the broadcast information.
EXAMPLE five
Fifth embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements a wireless access method according to any embodiment of the present invention:
performing time and frequency synchronization with a network to be accessed according to the synchronization information in the current subframe, wherein the equipment and the network to be accessed adopt the same network frame structure for communication; acquiring head symbol information in a current subframe, and determining a first position of the current subframe in a network frame structure according to the head symbol information, wherein the network frame structure comprises a system broadcast channel time slice, an access channel time slice, a service channel time slice, a management channel time slice and a response channel time slice; determining a second position of the system broadcast channel time slice in the network frame structure according to the first position; and receiving the broadcast information of the system broadcast channel time slice at the second position in a timing mode, and accessing the network to be accessed according to the broadcast information.
Any combination of one or more computer-readable media may be employed. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (9)
1. A wireless access method applied to a device is characterized by comprising the following steps:
performing time and frequency synchronization with a network to be accessed according to synchronization information in a current subframe, wherein the equipment and the network to be accessed adopt the same network frame structure for communication;
acquiring head symbol information in the current subframe, and determining a first position of the current subframe in the network frame structure according to the head symbol information, wherein the network frame structure comprises a system broadcast channel time slice, an access channel time slice, a service channel time slice, a management channel time slice and a response channel time slice;
determining a second location of the system broadcast channel time slice in the network frame structure based on the first location;
receiving the broadcast information of the system broadcast channel time slice at the second position in a timing mode, and accessing the network to be accessed according to the broadcast information;
wherein the synchronization information includes: a short synchronization sequence and a long synchronization sequence,
the time and frequency synchronization with the network to be accessed according to the synchronization information in the current subframe comprises the following steps:
and carrying out time and frequency synchronization with the network to be accessed according to the short synchronization sequence and the long synchronization sequence in the current subframe.
2. The method of claim 1, wherein the accessing the network to be accessed according to the broadcast information comprises:
acquiring the connection parameters of the network to be accessed according to the broadcast information;
sending an access request on the access channel time slice according to the connection parameters;
and detecting on the management channel time slice, and after determining that a response aiming at the access request is received, responding on the response channel time slice to determine to access the network to be accessed.
3. The method of claim 1, wherein the length of the current subframe comprises 1/4 time units, 1/2 time units, or 1 time unit.
4. The method of claim 1, wherein before performing time and frequency synchronization with the network to be accessed according to the synchronization information in the current subframe, the method further comprises:
determining that the current subframe is within an active time of a network scheduling period, wherein the active time is indicated for network communication.
5. The method according to claim 2, wherein after accessing the network to be accessed according to the broadcast information, the method further comprises:
acquiring communication resources;
and communicating in the network to be accessed according to the communication resources.
6. The method according to claim 2, wherein after accessing the network to be accessed according to the broadcast information, the method further comprises:
performing network detection at regular time to obtain a detection result, wherein the detection result comprises a collision with a network within a preset distance range and a non-collision with the network within the preset distance range;
and when the collision with the network within the preset distance range is determined, network switching or network fusion is carried out.
7. A wireless access apparatus, comprising:
the device comprises a synchronization module, a synchronization module and a processing module, wherein the synchronization module is used for carrying out time and frequency synchronization with a network to be accessed according to synchronization information in a current subframe, and equipment and the network to be accessed adopt the same network frame structure for communication;
a position determining module of a current subframe, configured to obtain header symbol information in the current subframe, and determine a first position of the current subframe in the network frame structure according to the header symbol information, where the network frame structure includes a system broadcast channel time slice, an access channel time slice, a service channel time slice, a management channel time slice, and an acknowledgement channel time slice;
a system broadcast channel time slice position determining module, configured to determine a second position of the system broadcast channel time slice in the network frame structure according to the first position;
the access module is used for receiving the broadcast information of the system broadcast channel time slice at the second position in a timing mode and accessing the network to be accessed according to the broadcast information;
wherein the synchronization information includes: a short synchronization sequence and a long synchronization sequence,
the synchronization module is specifically configured to: and carrying out time and frequency synchronization with the network to be accessed according to the short synchronization sequence and the long synchronization sequence in the current subframe.
8. A computing device, the device comprising:
one or more processors;
storage means for storing one or more programs;
when executed by the one or more processors, cause the one or more processors to implement the method of any one of claims 1-6.
9. A computer storage medium on which a computer program is stored, which program, when being executed by a processor, carries out the method according to any one of claims 1-6.
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