WO2012130025A1

WO2012130025A1 - Method and device for accessing wireless network

Info

Publication number: WO2012130025A1
Application number: PCT/CN2012/072045
Authority: WO
Inventors: 鲍东山; 姚惠娟; 周玉宝; 于晓燕; 雷俊; 刘慎发; 王竞; 潘立军; 闫志刚
Original assignee: 北京新岸线无线技术有限公司
Priority date: 2011-03-31
Filing date: 2012-03-07
Publication date: 2012-10-04
Also published as: CN102625464A; CN103609189B; CN103609189A

Abstract

Disclosed is a method for accessing a wireless network, comprising: sending a terminal basic capability negotiation request to a central access point CAP; and receiving a terminal basic capability negotiation response sent by the CAP and carrying working sub-channel mapping information, the working sub-channel mapping information indicating a target sub-channel to which a station STA is to be switched. Further disclosed are a terminal side device and a network side device for accessing a wireless network.

Description

Method and device for accessing wireless network

The application is filed on March 31, 2011, the application number is 201110081288.6, and the name of the invention is the priority of a Chinese patent application for a wireless communication method, the entire contents of which are hereby incorporated by reference.

This application claims the priority of the Chinese patent application entitled "A wireless communication method, system and device", the application date is March 31, 2011, the application number is 201110081193.4, and all the contents of the prior application are already in This application is embodied.

The present application claims the priority of the Chinese Patent Application No. 201110130194.3, the entire disclosure of which is incorporated herein by reference.

The application is filed on July 6, 2011, the application number is 201110188873.6, and the invention is entitled "The method and device for accessing the wireless network". The entire contents of the prior application have been It is embodied in this application.

The application is filed on February 16, 2012, the application number is 201210035553.1, and the title of the invention is the priority of the Chinese patent application for "method and device for accessing the wireless network", the entire contents of the prior application have been It is embodied in this application.

The application is filed on February 29, 2012, the application number is 201210050568.5, and the title of the invention is the priority of the Chinese patent application for "method and device for accessing the wireless network", the entire contents of the prior application have been It is embodied in this application. Technical field

The present invention relates to the field of wireless communications, and in particular, to a method and apparatus for accessing a wireless network. Background technique

In recent years, wireless communication systems have developed rapidly, such as 802.11-based wireless LAN technology WiFi, 802.15-based Bluetooth systems, and Femto technology for indoor applications generated by mobile communication systems. A wide range of applications.

802.11-based WiFi technology is one of the most widely used wireless network transmission technologies. Since the WiFi system uses the Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) mechanism, the system efficiency is much higher than that of the wireless resources. The root cause of this problem is that the CSMA/CA mechanism is a contention-based random multiple access mechanism, between a central access point (CAP, Access Point) and a station (STA, Station), or different STAs. In the meantime, the right to use wireless resources will be competed through the CSMA/CA mechanism, and at the same time, the wireless channel will be competed, and collision will occur at this time, resulting in waste of wireless resources. In order to avoid collisions, the CSMA/CA mechanism requires that the CAP or STA need to randomly retreat when competing for the wireless channel. When all CAPs and STAs are backed off, the wireless channel is idle but not used, which is also the pole of the wireless channel. Great waste. For the above reasons, 802.11 systems are less efficient. For example: The 802.l lg system physical layer peak rate can reach 54Mbps, but the TCP layer can reach no more than 30Mbps under the big packet download service. Despite the above shortcomings, the 802.11 system is flexible and does not rely on centralized control mechanisms, so it can achieve lower equipment costs.

The Femto technology based on the 3GPP standard is a new technology for indoor coverage that has evolved from a mobile communication system. Based on the statistics of 3G systems, about 70% of data services occur indoors, so indoor high-speed data access solutions are especially important. Femto base station, called pico Base station, small size and flexible deployment. Due to the evolution from mobile communication systems, Femto base stations have inherited almost all the characteristics of mobile communication systems. The Femto device only combines its limited coverage, fewer access users and other application scenarios, and reduces the processing power of the device, thereby reducing the cost of the device. Considering the duplex mode, like the mobile communication system, the Femto base station can be divided into two types of duplex mechanisms: FDD and TDD. The uplink and downlink carrier resources of the FDD are symmetric, and the asymmetric service characteristics of the uplink and downlink data traffic of the data service cause a certain waste of resources when the FDD system faces the data service. The uplink and downlink of the TDD system work on the same carrier, and the time resources are allocated to allocate different radio resources to the uplink and downlink. Therefore, the FDD can better adapt to the asymmetric data service of the uplink and downlink services. However, the TDD duplex mode of the mobile communication system (including the Femto system), the static allocation of uplink and downlink resources, and the various types of data services with different demands, such as browsing web pages, mobile video, mobile games, etc., are difficult to realize business requirements and resources. Dynamic adaptation of the partition. Compared with Wi-Fi, since Femto uses a centralized control mechanism based on scheduling, there is no waste of radio resources between the base station or CAP and the terminal or terminal due to collision and random backoff, so the link efficiency is high.

For wireless communication systems, there is a need to access wireless networks. Summary of the invention

A first object of the present invention is to provide a method for accessing a wireless network.

A second object of the present invention is to provide a terminal side device and a network side device for accessing a wireless network.

In order to have a basic understanding of some aspects of the disclosed embodiments, a summary of the cartridges is given below. This generalization is not a general comment, nor is it intended to identify key/important elements or to describe the scope of protection of these embodiments. Its sole purpose is to present some concepts in the form of a single sheet as a preface to the following detailed description.

The technical solution of the present invention is implemented as follows:

A method for accessing a wireless network, the method comprising:

Using the uplink transmission resource allocated by the central access point CAP, sending a terminal basic capability negotiation request to the CAP;

And receiving, by the CAP, a basic capability negotiation response of the terminal that carries the working subchannel mapping information, where the working subchannel mapping information indicates the target subchannel to which the STA is to be handed over.

In an embodiment, the method further includes: after correctly receiving the terminal basic capability negotiation response, sending an acknowledgement to the CAP.

In an embodiment, the method further includes: receiving an allocation indication of the uplink transmission resource.

Optionally, the method further includes: waiting for the set number of frames after the random access procedure performed before the sending the basic capability negotiation request is completed, and re-executing the random access process if the allocation indication is not received.

In an embodiment, the method further includes: waiting for the set number of frames after the basic capability negotiation request of the terminal is sent, and if the basic capability negotiation response of the terminal is not received, re-executing the random access procedure before sending the basic capability negotiation request of the terminal.

In an embodiment, the terminal basic capability negotiation response further carries spectrum aggregation mode information and/or an official identifier;

The spectrum aggregation mode information indicates a relationship between the plurality of target subchannels; the formal identifier is an official identifier of the STA within the CAP range.

In an embodiment, the terminal basic capability negotiation request carries the maximum working bandwidth of the STA.

Optionally, the terminal basic capability negotiation request further carries the subchannel information that is available to the STA. A method for accessing a wireless network, the method comprising:

Receiving, by the STA, a terminal basic capability negotiation request that is sent by using the allocated uplink transmission resource; sending, to the STA, a terminal basic capability negotiation response that carries the working subchannel mapping information, where the working subchannel mapping information indicates a target sub channel.

In an embodiment, the method further includes: receiving an acknowledgement sent by the STA after correctly receiving the basic capability negotiation response of the terminal.

Optionally, the method further includes: waiting for the set number of frames after sending the basic capability negotiation response of the terminal, and ending the process if the confirmation is not received.

Optionally, the terminal basic capability negotiation response is resent to the STA within the set number of frames.

In an embodiment, the method further includes: allocating the uplink transmission resource, and sending an indication of the uplink transmission resource to the STA.

And the spectrum aggregation mode information, where the STA determines a relationship between the plurality of target subchannels;

The official identifier is an official identifier assigned by the STA within its own scope.

In an embodiment, the terminal basic capability negotiation request carries a maximum working bandwidth of the STA;

The method further includes: determining the working subchannel mapping information;

And a sum of bandwidths of the target subchannels indicated by the working subchannel mapping information is less than or equal to a maximum working bandwidth of the STA.

Optionally, the method further includes: adjusting a maximum working bandwidth of the STA;

The sum of the bandwidths of the target subchannels indicated by the working subchannel mapping information is less than or equal to the adjusted maximum working bandwidth of the STA.

Optionally, the terminal basic capability negotiation request further carries the subchannel information that is available to the STA;

The target subchannel indicated by the working subchannel mapping information includes one or more available subchannels of the STA.

In one embodiment, the working subchannel mapping information indicates one or more target subchannels using a bitmap.

A terminal side device for accessing a wireless network, the device comprising:

a capability negotiation requesting unit, configured to send, by using an uplink transmission resource allocated by the CAP, a terminal basic capability negotiation request to the CAP;

The capability negotiation response receiving unit is configured to receive a terminal basic capability negotiation response that is sent by the CAP and carries the working subchannel mapping information, where the working subchannel mapping information indicates the target subchannel to be switched by the STA.

In an embodiment, the apparatus further includes: an acknowledgment unit, configured to send an acknowledgment to the CAP after the capability negotiation response receiving unit correctly receives the terminal basic capability negotiation response.

In an embodiment, the capability negotiation requesting unit further receives an allocation indication of the uplink transmission resource.

Optionally, the device further includes: a first triggering unit, configured to monitor the capability negotiation requesting unit within a set number of frames after the random access terminal side device completes the operation, if the capability negotiation requesting unit does not receive The allocation indication triggers the random access terminal side device to perform the operation again.

In an embodiment, the apparatus further includes: a second triggering unit, configured to monitor the capability negotiation ring within a set number of frames after the capability negotiation requesting unit sends the terminal basic capability negotiation request The receiving unit, if the capability negotiation response receiving unit does not receive the terminal basic capability negotiation response, triggers the random access terminal side device to perform the operation again.

The spectrum aggregation mode information is used to indicate a relationship between a plurality of the target subchannels; the formal identifier is an official identifier allocated by the STA in the CAP range.

In one embodiment, the apparatus further includes:

And a configuration parameter providing unit, configured to provide the maximum working bandwidth of the STA to the capability negotiation requesting unit for sending in a terminal basic capability negotiation request.

Optionally, the configuration parameter providing unit is further configured to provide the sub-channel information available to the STA to the capability negotiation requesting unit, where it is sent in a terminal basic capability negotiation request.

A network side device for accessing a wireless network, the device comprising:

The capability negotiation request receiving unit receives the terminal basic capability negotiation request sent by the STA by using the allocated uplink transmission resource;

The capability negotiation response unit sends a basic capability negotiation response carrying the working subchannel mapping information to the STA, where the working subchannel mapping information indicates the target subchannel to which the STA is to be handed over.

In an embodiment, the apparatus further includes: an acknowledgment receiving unit, configured to receive an acknowledgment sent by the STA after correctly receiving the basic capability negotiation response of the terminal.

Optionally, the device further includes: a monitoring unit, configured to monitor the acknowledgement receiving unit within a set number of frames after the capability negotiation response unit sends the terminal basic capability negotiation response, if the acknowledge receiving unit does not Upon receiving the acknowledgement, the capability negotiation request unit and the capability negotiation response unit are triggered to end the current operation.

Optionally, the capability negotiation response unit resends the terminal basic capability negotiation response to the STA before being triggered by the monitoring unit.

In an embodiment, the apparatus further includes: a resource allocation unit, configured to allocate, to the STA, an uplink transmission resource that sends a terminal basic capability negotiation request, and send an allocation indication of the uplink transmission resource.

In an embodiment, the apparatus further includes: a spectrum aggregation mode information providing unit and/or a formal identification allocation unit;

The spectrum aggregation mode information providing unit is configured to provide spectrum aggregation mode information indicating a relationship between the plurality of target subchannels to the capability negotiation response unit, where the information is carried in a terminal basic capability negotiation response;

The official identity allocation unit is configured to allocate a formal identity to the STA in its own range, and send the formal identity to the capability negotiation response unit, where the carrier is sent in the terminal basic capability negotiation response.

In an embodiment, the apparatus further includes: a working subchannel mapping information determining unit, configured to determine the working subchannel mapping information, and send the working subchannel mapping information to the capability negotiation response unit, where It is carried in the terminal basic capability negotiation response;

Optionally, the working subchannel mapping information determining unit further adjusts a maximum working bandwidth of the STA carried in the basic capability negotiation request of the terminal;

The sum of the bandwidths of the target subchannels indicated by the working subchannel mapping information is less than or equal to the adjusted maximum working bandwidth of the STA. Optionally, the target subchannel indicated by the working subchannel mapping information includes one or more available subchannels of the STA.

It can be seen that, when the capability negotiation is performed, the present invention also indicates the target subchannel to which the STA is to be handed over, that is, enables the STA to perform channel switching while the capability negotiation is performed, and balances the operation on each subchannel on the basis of the saving operation flow. load.

For the above and related purposes, one or more embodiments include the features that are described in detail below and particularly pointed out in the claims. The following description and the annexed drawings are intended to illustrate certain exemplary aspects, Other advantages and novel features will become apparent from the Detailed Description of the Drawing. DRAWINGS

1 is a flow chart of a method for accessing a wireless network in the present invention;

2 is a flow chart of a method for capability negotiation in the present invention;

Figure 3 is a reference model of the EUHT system;

Figure 4 shows the composition of the access system of the EUHT system;

5 is a schematic diagram of a process of transmitting and receiving protocol data between a STA and a CAP; FIG. 6 is a flowchart of a method for acquiring system synchronization in an embodiment of the present invention;

7 is a road diagram of a method for maintaining synchronization in an embodiment of the present invention;

8 is a flowchart of a method for random access in an embodiment of the present invention;

9 is a schematic diagram of transmitting a random access sequence in an embodiment of the present invention;

10a 10c are formats of an uplink random access channel according to an embodiment of the present invention;

FIG. 11 is a flowchart of a method for capability negotiation according to an embodiment of the present invention;

12 is a schematic structural diagram of a terminal side device accessing a wireless network according to the present invention;

FIG. 13 is a schematic structural diagram of an apparatus for acquiring system synchronization according to an embodiment of the present invention; FIG. 14 is another schematic structural diagram of an apparatus for acquiring system synchronization according to an embodiment of the present invention; FIG. 16 is a schematic structural diagram of a capability negotiation terminal side device according to an embodiment of the present invention;

17 is a schematic structural diagram of a network side device accessing a wireless network according to the present invention;

FIG. 18 is a schematic structural diagram of a first random access wireless network side device according to an embodiment of the present invention; FIG. 19 is a schematic structural diagram of a capability negotiation network side device according to an embodiment of the present invention;

20 is a flowchart of a method for accessing a wireless network according to the present invention;

21 is a flowchart of another method for accessing a wireless network in the present invention;

FIG. 22 is still another method for accessing a wireless network in the present invention. detailed description

The detailed description of the embodiments of the invention are set forth in the description Other embodiments may include structural, logical, electrical, process, and other changes. The examples represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operations may vary. Portions and features of some embodiments may be included or substituted for portions and features of other embodiments. The scope of the embodiments of the invention includes the full scope of the claims, and all equivalents of the claims. Herein, these embodiments of the invention may be represented individually or collectively by the term "invention". This is for convenience only, and if more than one invention is disclosed, it is not intended to limit the scope of the application to any single invention or inventive concept.

1 is a flowchart of a method for accessing a wireless network in the present invention, where the process includes:

Step 11: Get system synchronization.

The acquisition system synchronization here, including obtaining system parameters, is equivalent to the process of system initialization.

Step 12: Randomly access the CAP and perform capability negotiation with the CAP.

In this step, the random access procedure is performed based on the result performed in step 11, and the capability negotiation process is performed by using the result obtained after the random access is completed, and the specific content will be described in detail later.

According to the flow shown in FIG. 1, the wireless network can be accessed in the wireless communication system. The method for accessing a wireless network provided by the present invention refers to a specific implementation method of a capability negotiation process in the process of accessing a wireless network.

2 is a flowchart of a method for capability negotiation in the present invention, where the process includes:

Step 21: Send the terminal basic capability negotiation request to the CAP by using the uplink transmission resource allocated by the CAP.

Step 22: Receive a basic capability negotiation response of the terminal that carries the working subchannel mapping information sent by the CAP, where the working subchannel mapping information indicates a target subchannel to be switched by the STA.

The capability negotiation method provided by the present invention, when performing capability negotiation, also indicates the target subchannel to which the STA is to be handed over, that is, enables the STA to perform channel switching while the capability negotiation is performed, and balances the children on the basis of the saving operation flow. The load on the channel.

In the embodiment of the present invention given below, the newly defined enhanced ultra-high speed wireless local area network (EUHT) system is used as an application scenario. EUHT dramatically increases system capacity through multi-channel transmission, multi-user multiple input multiple output (MU-MIMO) and other technologies. EUHT also uses a centralized scheduling mechanism to avoid collisions and backoffs of air interfaces and to provide differentiated services for different services. The EUHT system can provide at least 1.2 Gbps of throughput to meet current user requirements for wireless network data transmission rates.

Figure 3 shows the reference model for the EUHT system.

The system reference model shown in Figure 3 mainly refers to the air interface reference model, including: Media Access Control (MAC) layer and physical (PHY) layer. The main functions of each layer are as follows:

1 The MAC layer includes an adaptation sublayer and a MAC sublayer.

Adaptation sublayer: Provides the function of mapping and conversion between external network data and MAC layer service protocol unit (MSDU). MSDU refers to information delivered as a unit between MAC Service Access Points (SAP).

MAC sublayer: In addition to acting as a media access control function, it also includes management and control of the system and support for specific functions of the PHY layer.

2 PHY layer: mainly provides PHY transmission mechanisms for mapping MAC layer protocol data units (MPDUs) to corresponding physical channels, such as Orthogonal Frequency Division Multiplexing (OFDM) and Multiple Input Multiple Output (MIMO) technologies. MPDU refers to the data unit exchanged between two peer MAC entities using PHY layer services.

Figure 4 shows the access system of the EUHT system, including the central access point (CAP) and the station (STA), where the STA can be used for various data devices, such as: PDA, notebook, camera, camera, mobile phone, tablet Computer, pad, etc. As shown in FIG. 3, STA1 and STA2 access the CAP through an air interface protocol, and the CAP establishes communication with an existing external network (such as IP bone network, Ethernet) through wired or wireless. The protocol composition of the CAP includes a MAC layer and a PHY layer. The STA protocol consists of an Application layer, a Transmission Control (TCP) layer, a Network (IP) layer, a MAC layer, and a PHY layer. Based on the protocol composition shown in FIG. 4, FIG. 5 shows the process of transmitting and receiving protocol data between the STA and the CAP. For example, the STA wants to send data to the CAP, and the STA first applies the application data (such as VoIP, video, etc.). The application layer and the TCP/IP layer process and package, and send it to the IP adaptation sublayer in the form of IP packets, which are converted and mapped by the IP adaptation sublayer, and sent to the MAC sublayer. The MAC sublayer is fragmented, encrypted, and Operations such as framing, aggregation, etc. are sent to the PHY layer, which is ultimately mapped by the PHY to the wireless channel for data transmission.

The exception handling involved in the following embodiments may also use the system setting parameters as shown in Table 1, which is given here. Table 1

As an optional embodiment, the step of acquiring system synchronization in the process shown in FIG. 1 , step 11 can be implemented by the following sub-steps:

Sub-step 1: Find the physical frame on the current subchannel.

Sub-step 2: Parsing the system information channel (SICH) and the control channel (CCH) in the found physical frame, the SICH indicating the structure of the physical frame, and the CCH indicating the allocation of system resources.

The method for accessing a wireless network in the present invention is directed to the case where the physical frame structure can be dynamically configured. The SICH in the physical frame indicates the structural configuration of the physical frame, for example, indicating whether the channel in the physical frame is timely or not.

The CCH in the physical frame indicates the allocation of system resources, including an indication of the resources allocated for the system parameters.

Sub-step 3: Use the parsing result to get the system parameters from the physical frame.

It can be seen that, in the method for accessing a wireless network provided by the present invention, the acquisition system synchronization is implemented for the dynamic configuration of the physical frame structure.

In the EUHT system, both STA and CAP can support 20MHz, 40MHz and 80MHz. The system pre-determines the channel list to indicate the sub-channels of the system. These sub-channels can contain one or more working sub-channels of CAP.

An example of a list of predetermined channels in the 2.4 GHz band is given in Table 2 below.

Table 2

Channel number carrier center frequency (MHz) 1 2412

2 2417

3 2422

4 2427

5 2432

6 2437

7 2442

8 2447

9 2452

10 2457

11 2462

12 2467

13 2472 FIG. 6 is a flowchart of a method for accessing a wireless network according to an embodiment of the present invention, where the method includes the process of acquiring synchronization, where the process of acquiring synchronization includes:

Step 61: Find a physical frame on the current subchannel, specifically, determine whether a frame header of the physical frame is detected on the current subchannel, and if yes, perform step 62, otherwise continue to perform detection until the waiting time of the subchannel is exceeded. , move to the next subchannel and proceed to step 61.

Step 62: Determine whether the SICH and CCH in the physical frame can be parsed. If yes, go to step 63. Otherwise, continue to step 61. When the waiting time of the subchannel is exceeded, transfer to the next subchannel to continue to step 61.

In the physical frame to which the present invention is directed, the positions of the preamble sequence and the SICH are preset in advance and are not dynamically configured. The CCH is located adjacent to the SICH, and the duration of the CCH can be dynamically configured.

The SICH indicates the structural configuration of the physical frame, and specifically indicates the presence and/or duration of each channel in the current physical frame. For example, for some channels with fixed duration, the SICH can use 1 bit to indicate the presence or absence of the channel, which implicitly indicates the duration of the channel. For some channels with irregular duration, multiple bits can be used in the SICH to indicate CCH. For example, 6 bits can be used in the SICH, and a maximum of 63 OFDM symbols can be indicated. One OFDM symbol is a minimum resource allocation unit, for example, the 6 bits are 010000, and the converted decimal number is 16, that is, corresponding to 16 OFDM symbols.

By parsing the SICH, it can be determined that the location of the CCH in the physical frame is long and long, and then the broadcast scheduling signaling is detected from the CCH in the physical frame to detect the resource allocated for the BCF. An example of broadcast scheduling signaling is given in Table 3 below. The BCF is transmitted in the signaling/feedback channel shown in Table 3, and the signaling/feedback channel is included in the transport channel. Determined downlink signaling / feedback channel resources 0000 indicates when to take, if set to 0 it is determined that there is a frame BCF, _{_65--2} position indication _resources, Κ, Ί indicating the length of the resource. table 3

Definition

Bit

Downward

Broadcast type

Bi b ₃ b ₂ b, _3⁄4 =0000, downlink signaling/feedback channel resource indication

b ₃ b ₂ b _x =0001, uplink signaling/feedback channel resource indication b ₇ b ₆ b ₅ b ₄ 20MHz subchannel Bitmap, multiple subchannels can be set with the same signaling/feedback channel

Signaling / Feedback Channel Resource Block Start OFDM Symbol, Domain Value: 1~511 Reserved

Number of symbols occupied by the signaling/feedback channel, field value: 0-63

00: Format 1

Reserved 01 : Format 2

10-11 : Reserved

0: The downlink broadcast channel allocation is valid;

1 : Downstream broadcast channel allocation is invalid

Signaling for downlink broadcast channel occupancy /

Reserved

Feedback channel start index, field value:

1~32

Signaling for downlink broadcast channel occupancy /

Number of feedback channels, field value: 1~8

b ... b ₄₀ reserved

b, b _1Q "b ₅₆ 16-bit CRC is added by B STAID. Step 63: Determine whether a broadcast information frame (BCF) is detected. If yes, implement downlink synchronization. Otherwise, return to step 61 until the subchannel is exceeded. At the time, the process proceeds to the next subchannel and proceeds to step 61.

The BCF is a broadcast configuration message, and is periodically broadcast by the CAP on all working subchannels, which carries the MAC address of the CAP, so that the STA identifies the sender of the BCF. The system parameters are also carried in the BCF.

The system parameters carried by the BCF may include various parameters that indicate the subsequent processes of the network access or other processes after the network is completed.

An example of the BCF frame body carrying information is given in Table 4 below. Table 4

A^-self, length (ratio

Remarks

Special)

CAP MAC address 48 CAP unique identifier

Working channel number 8 The minimum channel number occupied by the CAP

2 used to broadcast the working bandwidth of the CAP,

0 means 20MHz;

Working bandwidth 1 shows 40MHz;

2 shows 80MHz;

3 Reserved.

3 Used to indicate the most antenna configuration on the CAP side.

0 means 1 antenna;

1 means 2 antennas;

The antenna 2 at the CAP end represents 3 antennas;

Configuration 3 means 4 antennas;

4 indicates 5 antennas;

5 indicates 6 antennas;

6 indicates 7 antennas; 7 indicates 8 antennas;

Reserved 3, the default setting is 0

8 Valid length of the network alias field, in the range 1-31, network alias length

Unit byte.

248 A string beginning with a letter or number, up to a length of 3 1 network alias

byte.

64 Provide a common clock within the CAP for the STA initial timestamp

Initialized system synchronization, unit us.

The BCF interval 16 indicates the time period in which the BCF frame appears, in ms. Random access backoff 4 is used for random access backoff window control. The minimum window value of the minimum window is 0~2 ⁿ - l

Scheduling request backoff 4 Minimum window system for the control of the backoff window based on the resource request of the competition, the minimum window value range 0~2 ⁿ - 1

Random access backoff 8 is used for random access backoff window control. The maximum window value of the maximum window is 0~2 ⁿ - l

Scheduling request backoff 8 Maximum window system for the control of the backoff window based on the resource request of the competition, the maximum window value range is 0~2 ⁿ - l

8 indicates the current transmit power of the CAP

This field corresponds to the signed decimal number n.

CAP transmit power

n=- 128- 127 (The negative part is represented in complement form): The CAP transmit power is n dBm.

Reserved 5, the default setting is 0

Downstream pilot pilot 3

Indicating the downlink sounding pilot pattern index

Pattern

8 Indicates the downlink sounding channel of the downlink sounding channel in the DL-TCH channel. This field corresponds to the position where the decimal number is η, η=0~255. The downlink sounding channel divides the DL-TCH channel into two parts, and the latter part has n OFDM symbols. Demodulation Pilot Time Domain ^ 7 Demodulation Pilot Time i or the number of OFDM symbols in the interval (short interval 0 interval configuration)

Demodulation Pilot Time Domain ^ 9 Number of OFDM symbols for demodulation pilot time domain interval (long interval 1 interval configuration)

2 Downstream and uplink conversion time scheme

0: The guard interval is 2 OFDM symbol periods;

DGI

1: guard interval is 4 OFDM symbol periods; 2~3: reserved

2 Uplink and downlink conversion time scheme

0: The guard interval is 2 OFDM symbol periods;

UGI 1: guard interval is 4 OFDM symbol periods (processing delay);

2~3: Reserved

2 00: Random access format 1

UL-RACH 01 : Random access format 2

Channel format 10: Random Access Format 3

11 : Reserved Reserved 10 The default setting is 0. As shown in Table 4, the information carried in the BCF can be divided into the following categories:

I) The MAC address of the CAP, on which the STA can identify the CAP that sent the BCF based on the MAC address. 2) The working channel number and working bandwidth of the CAP, combined with the working channel number and working bandwidth here,

The STA may determine other working subchannels of the CAP that broadcast the BCF in addition to the subchannels currently detecting the BCF.

3) Antenna configuration of the CAP, the STA will use this parameter after successful access to the wireless network.

4) Network alias, indicating the network name, so that the STA can select the network to join.

5) The length of the network alias, indicating the length of the network alias field. The length of the network alias field is fixed to save overhead and reduce the resolution bias.

6) Indicates the timestamp of the system's common clock, and the STA can adjust its own clock based on the timestamp.

7) Indicates the BCF interval of the BCF broadcast period. After the STA obtains the system parameters for the first time, the STA needs to continuously receive the SICH and the BCF to confirm that it is always in contact with the CAP. According to the BCF interval, the STA can obtain the BCF periodically.

8) Collision avoidance parameters, including: a minimum window for random access backoff and a maximum window for random access backoff, and a minimum window for scheduling request backoff and a maximum window for scheduling request backoff. The STA may perform backoff according to the minimum window of the random access evasion and the maximum window of the random access backoff when multiple STAs collide in the subsequent random access procedure. The STA can also back off the minimum window according to the scheduling request and the maximum window of the scheduling request backoff, and perform backoff when the scheduling request conflicts. The specific method of performing backoff is described in detail later.

9) The transmit power of the CAP, after successful access to the wireless network, the STA can perform open-loop power control according to the transmit power.

10) Physical frame structure parameters, including:

a DGI for indicating the transition time of the downlink and the uplink, and a UGI for indicating the transition time of the uplink and the downlink;

a location of a downlink sounding channel for indicating a starting position of the downlink sounding channel in the downlink transport channel;

a downlink sounding pilot pattern for indicating a downlink sounding pilot pattern image index;

And i or interval for demodulating pilots for demodulating pilot time i or interval.

The physical frame structure parameter carried in the BCF frame indicates a part of the structure in the physical frame. This part of the structure generally does not change when the physical frame structure is dynamically configured. Therefore, it carries a unified indication in the BCF, so that there is no need to repeat the indication in the SICH. , saving the cost of SICH.

I I ) An uplink random access channel (UL-RACH) format for indicating a random access format. In the present invention, different uplink random access channel formats are set for different random access distances to support coverage of further distances, and STA selection and random access are indicated by indicating an uplink random access channel format in the BCF. The distance matches the format.

According to the specific application requirements, the CAP can carry one or several items of the information shown in Table 4 in the generated BCF, and then broadcast the generated BCF.

After the STA acquires the system parameters on a certain subchannel, it will transfer to the next subchannel to continue to perform step 61 until a scan is performed on all the subchannels in the channel list to complete the process of acquiring synchronization.

After performing an overscan on each subchannel in the channel list, the STA may acquire system parameters on one or more subchannels, which may be working subchannels of the same CAP, and may also include different The working subchannel of the CAP. STA will have obtained system parameters All subchannels are available as subchannels, and any one of them is selected as a subchannel for performing the synchronization process and the random access procedure, and also determines the CAP to be accessed.

The method of the present invention further includes a process of maintaining synchronization, including: continuing to search for a physical frame on the selected subchannel; parsing the SICH and the CCH in the found physical frame; and detecting the BCF from the found physical frame by using the parsing result, To get system parameters.

Specifically, FIG. 7 is a flowchart of STA synchronization in an embodiment of the present invention. As can be seen from Figure 7, in the process of maintaining synchronization, the SICH timer and the BCF timer are set, and the STA continues to search for a physical frame on the selected subchannel, and starts the SICH timer and the BCF timer. If the SICH is successfully parsed before the SICH timer expires, the SICH timer is reset. If the BCF is successfully detected before the BCF timer expires, the BCF timer is reset and the physical frame is continued to be searched on the selected subchannel. When any of the two timers expires but the corresponding information is not successfully detected, the STA is considered to be out of synchronization and the channel needs to be scanned again. The rescanning channel here specifically includes the following two implementations:

First, starting with the selected subchannel as a starting point, re-execute the process of acquiring synchronization according to the channel list, and after acquiring the system parameters on one subchannel, directly performing the process of maintaining synchronization by using the subchannel as the selected subchannel. If the last subchannel scanned to the channel list still has no available subchannels, continue to scan the first subchannel of the channel list;

Second, the process of re-execution acquisition synchronization according to the channel list is equivalent to scanning each channel in the channel list, and then selecting an available sub-channel to perform the process of maintaining synchronization again.

The above two implementations can be applied to the following two scenarios:

1) After the process of obtaining synchronization ends, only one available subchannel is determined;

2) After the process of obtaining synchronization ends, if the set time is exceeded, the available subchannels determined in the acquisition synchronization process are no longer considered. This case is also called channel list expiration.

Of course, the above two implementations are not necessarily applied in these two scenarios, and any of the implementations can be used as a predetermined operation mode.

As an alternative implementation manner, after the STA is out of synchronization, another available subchannel can be used as the selected subchannel, and the process of maintaining synchronization is performed again. This implementation can be applied to the following application scenarios: After the process of acquiring synchronization ends, it is determined that more than one subchannel is available, and the current channel list has not expired. Of course, if there is no limit on the expiration of the channel list in the system, this implementation can also be used as a predetermined operation mode. When more than one available subchannel is determined when the process of acquiring synchronization is performed for the first time, the operation can be used. mode.

The timing of the SICH timer and the BCF timer can be flexibly set according to the application requirements. It can be seen that maintaining synchronization is a process in which the STA continuously searches for a physical frame on the selected subchannel, and continuously analyzes the SICH and detects the BCF. Since the SICH indicates the structure of the physical frame to which the subframe belongs, the STA can learn the start time of the next physical frame by using the parsing result of the current SICH while maintaining synchronization.

As an optional embodiment, FIG. 8 is a flowchart of a method for random access in an embodiment of the present invention, where the process includes:

Step 81: Send a random access sequence to the CAP on any one of the subchannels.

The purpose of sending a random access sequence is to send an uplink transmission resource of a random access request to the CAP request.

Any one of the subchannels herein refers to an available subchannel determined by the STA after the process of acquiring the synchronization of the system, and the selection of the channel is arbitrary, whereby multiple STAs can be dispersed in different subchannels. Sending random access sequences avoids competition in one subchannel, reduces the probability of collisions, and improves the success rate of accessing the wireless network.

When the random access sequence is sent, the process shown in Figure 9 is specifically performed, where CAP-MAC refers to The lowest 7 bits of the MAC address of the CAP is the PN sequence index ( 0 ≤ < 4 ), } is the cyclic shift parameter set, and _/ is the cyclic shift parameter index ( 0 ≤ _ / < 8 ). The random access sequence is transmitted in the uplink random access channel in the physical frame, using the uplink random access channel format indicated in the BCF.

10a to 10c show the format of three uplink random access channels that can be selected in the embodiment of the present invention, which corresponds to the BCF example given in Table 4. The selection of the uplink random access channel format includes the following cases:

When 00 is indicated in the UL-RACH channel format field in the BCF, the channel format in Figure 10a is used, at匕{{5 _CS } = {0 l.6us 3.2us 4 s 6Aus S.Ous 9.6us 1 1.2^ }; When 01 is indicated in the UL-RACH channel format field in the BCF, the channel format in Figure 10b is used, it es } = {0 3.2us 6Aus 9.6us };

When 10 is indicated in the UL-RACH channel format field in the BCF, the channel format in Figure 10c is used,

= 0 6Aus } ₀

Step 82: The CAP indicates the uplink transmission resource allocated according to the random access sequence.

The CAP uses broadcast signaling to indicate the allocated uplink transmission resources, and Table 5 below shows an example of the bits in the broadcast signal and their indication meanings. The allocation 1 and the allocation 2 respectively correspond to one STA, and the allocation 1 is taken as an example. The value of the STA passing the identification broadcast type is to allocate resources for the random access request frame, and the STA passes the random access sequence index and the random access sequence frequency domain loop. The shift index and the system frame number of the random access occurrence of the lowest 3 bits and three items are used to find the corresponding uplink transmission resource from the broadcast signaling.

The PN sequence in Table 5 refers to a random access sequence, and the signaling/feedback channel is a channel in the transmission channel for transmitting signaling and performing feedback.

The transmission timing advance in Table 5 indicates the amount by which the STA needs to advance timing when transmitting in the uplink. When the STA subsequently transmits all the uplink frames, the timing advance is performed according to the transmission timing advance amount. table 5

71 70 "' ^ 56 16-bit CRC is added by B STAID. If the STA does not receive the resource allocation information of the uplink transmission resource after the random access maximum waiting frame interval, the STA considers this. The secondary random access fails, and the random access procedure needs to be re-sent, that is, the random access sequence is retransmitted on the current subchannel.

The frame number timing is used here, and the timing is more accurate than using the timer timing.

The time for resending the random access sequence is related to random access backoff.

Using a binary exponential backoff algorithm to handle collision collisions, the complete processing flow is illustrated by the following steps:

SS1: When the STA sends a random access sequence, set a minimum window CfF _min whose internal backoff window is equal to the random access backoff carried in the BCF frame;

SS2: the STA sends a random access sequence on a random access channel of any one of the subchannels;

SS3: The STA waits for the resource allocation information for the random access request in the subsequent CCH, that is, the allocation information of the uplink transmission resource carried in the foregoing broadcast signaling;

SS4: If the STA receives the resource allocation information, the processing ends, indicating that there is no contention conflict; SS5: if the resource allocation information for the random access request is not detected in the CCH within the random access maximum waiting frame interval, Then the STA believes that the competition is a conflict;

SS6: The STA will randomly select the backoff value between [0 S^.C^mJ (the backoff window is not greater than the maximum backoff window), and the backoff unit is one frame, where m indicates the number of retransmissions;

SS7: The STA resends the random access sequence after the backoff counter is 0.

Repeat the above four steps of SS4-SS7 until the random access maximum retries is reached.

Step 83: Send a random access request frame to the CAP by using the uplink transmission resource allocated by the CAP. The random access request encapsulation in the present invention is implemented in a random access request frame, and the following Table 6 gives an example of the frame body carrying information of the random access request frame. Table 6

As shown in Table 6, the information carried by the frame body of the random access request frame includes the following:

1) The MAC address of the STA, so that the CAP can identify the STA that sends the random access request frame; the CAP will save the unique identifier of the STA, and then allocate the temporary identifier and the official identifier in the CAP range for the STA.

2) The MAC address of the CAP, so that the CAP can identify itself as the receiving end of the random access request frame;

3) Power control parameters, including: power adjustment margin and STA current transmit power. The STA is to perform closed-loop power control, which is often implemented by a separate power adjustment procedure. In the embodiment of the present invention, carrying the power control parameter in the random access request frame, the STA can perform closed-loop power control in the process of random access. .

The STA may generate a random access request frame and carry one or more of the information shown in Table 6, and then transmit the generated random access request frame.

If the STA does not receive the random access response frame after the random access request frame exceeds the maximum waiting frame interval of the random access response, the STA considers that the random access fails and needs to perform the random access procedure again. Step 81 is executed. At this time, the random access sequence is retransmitted on the current subchannel, and the retransmission time is related to the random backoff introduced in the foregoing.

Step 84: Receive a random access response frame sent by the CAP.

The CAP indicates, by the broadcast signaling, the downlink transmission resource that sends the random access response frame to the STA. Table 7 gives an example of the bits in the broadcast signaling and their indications. The allocations 1 to 3 in Table 7 correspond to one STA, respectively, with the allocation 1 as an example, and the STA passes ^. Identifying the broadcast type is to allocate resources for the random access response frame, and the STA determines the corresponding by the random access sequence index, the random access sequence frequency domain cyclic shift index, and the system frame number of the random access occurrence of the lowest 3 bits. The downlink transmission resource of its own random access response frame. The PN sequence in Table 7 refers to a random access sequence, and the signaling/feedback channel refers to a channel in which downlink signaling and feedback for uplink traffic are transmitted in the downlink transmission channel. Table 7

Bit definition

Broadcast type

bA ^b i ^b ob ₃ b ₂ b, b ₀ =0101, random access response frame (allocation of resources for random access response frame) bA ^b A reservation

3⁄4Λ, PN sequence index, 0~3

b _n b _x A. , PN sequence frequency domain cyclic shift cable 1

000 cyclic shift 0, 001 cyclic shift 32, and so on 111 cyclic shift 224 23 22 ''' _3⁄4 b, _s b, ₄ b , system frame number of random access occurs 4 氐 3 bits

Assignment 1

b _2l b ₂₀ - - -b _l6 , the resource allocated for the random access response is indexed at the start position of the signaling/feedback channel, the field value ranges from 1 to 63, and the field value is 0 indicates invalid indication b ₂₃ b ₂ 2 ' Reserved

Bb ₄ , PN sequence index, field value 0~3

b ₂ , b ₂₁ b ₂₆ , PN sequence frequency domain cyclic shift cable 1

000 cyclic shift 0, 001 cyclic shift 32, and so on 111 cyclic shift 224 39 38... 24 b _3l b ₃₀ b ₂₉ , system frame number of random access occurs at least 3 bits

Distribution 2

b ₃₁ b ₃₆ - - -b ₃₂ , the resource allocated for the random access response is indexed at the beginning of the signaling/feedback channel, the value of the field ranges from 1 to 63, and the value of 0 indicates invalid indication b ₃₉ b _3& Reserved b _4l b ₄₀ , PN sequence index, field value 0~3

b ₄₄ b ₄₃ b ₄₂ , PN sequence frequency domain cyclic shift cable 1

000 cyclic shift 0, 001 cyclic shift 32, and so on 111 cyclic shift 224 b ₄₇ b ₄₆ b ₄₅ , the lowest frame number of the system frame number of random access occurs

Distribution 3

bH, the resource allocated for the random access response is indexed at the starting position of the signaling/feedback channel, the value of the field is in the range of 1 to 63, and the value of 0 is the invalid indication b ₅₅ , reserved

b, b _1Q "b ₅₆ 16-bit CRC is implemented in the random access response frame by the BSTAID plus 4 random access response in the embodiment. Corresponding to the random access request frame given in Table 6 carrying information For example, Table 8 below gives an example of the frame body carrying information of the corresponding random access response frame.

As shown in Table 8, the information carried in the random access response frame includes the following:

1) The MAC address of the STA. After receiving the random access response frame, the STA re-sends the random access sequence if it finds that the MAC address of the STA carried in it does not match its own address.

The temporary identifier TSTA ID assigned to the STA in the CAP range is used to identify the STA before the access to the wireless network is successful, and the STA is assigned an official identifier in the CAP range. For example, the resource indication broadcast signal may be in the capability negotiation phase. In the command, the TSTA ID is used to identify the uplink transmission resource allocated by the CAP to the STA. Since the STA may not successfully access the wireless network for various reasons, if the STA is assigned an official identifier within the CAP range in the random access phase, the identification resource will be wasted. In order to meet the requirements of the identifier STA and not to waste the identifier resource, the STA is selected to allocate a temporary identifier, and the temporary identifier may correspond to a collection period, which is greater than the time required for the STA to complete the network access, and the STA is assumed to be connected to the wireless network. If the subsequent process fails, the temporary ID assigned to the STA will be reclaimed after the collection cycle is reached. 3) The power control parameter adjustment value indicates how the STA should adjust the power control parameters. The CAP determines the adjustment value according to the power control parameter carried in the random access request. Specifically, the CAP determines the power control parameter adjustment value according to the adjustment margin carried in the random access request.

4) Access mode, indicating that the STA is successful or abandoned.

The CAP determines the access status according to the measurement result of the uplink signal. For example, the access status may be determined according to information such as the signal quality of the uplink channel.

When the signal quality is within an acceptable range, the CAP determines the access status as successful.

When the signal quality is not within the acceptable range, the CAP determines the access status as abandonment, and the random access fails.

When the access status indicates abandonment, the random access response frame does not carry the TSTA ID, or the TSTA ID is set to invalid data.

The STA may generate a random access response frame and carry one or more of the information shown in Table 8, and then transmit the generated random access response frame.

As an optional embodiment, if power control is not required in some application scenarios, for example, the power control parameters of the STAs in the system are fixed, and the power control parameters are not required to be carried in the random access request, correspondingly The CAP also does not need to determine the power control parameter adjustment value.

In the embodiment of the random access method of the present invention, after receiving the random access sequence sent by the STA, the CAP may also delete the random access request frame sent by the STA after waiting for the random access maximum waiting frame interval. All the information corresponding to the STA, or the information corresponding to the random access sequence of the STA.

As an optional embodiment, FIG. 11 is a flowchart of a method for capability negotiation in an embodiment of the present invention, where the process includes:

Step 111: The CAP allocates an uplink transmission resource.

In this step, after the random access is completed, the CAP actively allocates an uplink transmission resource to the STA, and sends an allocation indication of the uplink transmission resource to the STA. The foregoing allocation indication may be broadcast signaling, and the TSTA ID of the STA is used in the broadcast signaling to identify the uplink transmission resource allocated thereto. The STA uses its own TSTA ID to find the uplink transmission resource allocated by the CAP from the above broadcast signaling, and uses the uplink transmission resource to send the terminal basic capability negotiation request.

Optionally, after receiving the random access response sent by the CAP, the STA may wait for the maximum waiting frame interval of the basic capability negotiation request frame of the terminal, and if the CAP does not receive the allocation indication of the uplink transmission resource, the STA considers that the capability negotiation fails. , the random access process needs to be re-executed.

Step 112: Send a terminal basic capability negotiation request frame (SBC-REQ) to the CAP.

The terminal basic capability negotiation request in the embodiment is encapsulated in the terminal basic capability negotiation request frame, and an example of the frame body carrying information of the terminal basic capability negotiation request frame is given in Table 9 below. Table 9

Name length (ratio

Special)

The number of antennas of the STA 3 0 represents 1 antenna;

1 means 2 antennas;

2 indicates 3 antennas;

3 means 4 antennas;

4 indicates 5 antennas

5 means 6 antennas

6 indicates 7 antennas

7 indicates 8 antennas STA maximum work 2 0: 20MHz

Bandwidth 1 : 40MHz

2: 80MHz

3: Reserved

STA supports spectrum 2 0: Not supported

Aggregation 1 : Support for spectrum aggregation mode 1

2: Support spectrum aggregation mode 2 3 : Support spectrum aggregation mode 1 and 2

STA supported tone 1 0: Only time division scheduling mechanism is supported 1 : Reserved

STA working sub 4 subchannel 0

Channel mapping subchannel 1

Subchannel 2

Subchannel 3

A bitmap OR operation can indicate that the iz and 80MHz terminals operate on a 20MHz subchannel. Reserved 4 , the default setting is 0

STA maximum transmission 3 0 indicates that the number of streams is 1

The number of streams 1 means that the number of 3⁄4 is 2

2 indicates that the number of streams is 3

3 indicates that the number of streams is 4

4 indicates that the number of streams is 5

5 indicates that the number of streams is 6

6 indicates that the number of streams is 7

7 means that the number of 3⁄4 is 8

STA maximum reception 3 0 indicates that the number of streams is 1

The number of streams 1 means that the number of 3⁄4 is 2

2 indicates that the number of streams is 3

3 indicates that the number of streams is 4

4 indicates that the number of streams is 5

5 indicates that the number of streams is 6

6 indicates that the number of streams is 7

7 means that the number of 3⁄4 is 8

STA MCS can 0 does not support 256-QAM

¹¹

Force indication 1 support 256-QAM

STA UEQM can 0 does not support UEQM

¹¹

Force indication 1 support UEQM

STA LDPC can 0 does not support LDPC code length 1

¹¹

Force indication 1 Support LDPC code length 1

STA Tx STBC 0 is not supported

¹¹

Capability indicator 1 Support

STA Rx STBC 0 is not supported

¹¹

Capability indicator 1 support STA 1 0: Not supported

MU-MIMO can 1 : Support

Force indication

Reserved 1 , the default setting is 0

Subcarrier grouping 3 indicates the number of subcarriers in the group: Ns feedback capability 0: 1 (FPI=1) in the group

Subcarrier (not grouped);

1 : 2 ( FPI=2 ) in the group

Subcarrier

2: 4 ( FPI=4 ) in the group

Subcarrier

3: 8 ( FPI=8 ) in the group

Subcarrier

4: The group includes 16 ( FPI=16 )

Subcarriers;

5-7: Reserved.

Supported MIMO 3 000: Feedback not supported

Feedback mode combination 001 : CSI - MIMO feedback

010: BFM - MIMO feedback

100: Reserved

Indicates a Bitmap or operation

STA supports a combination of multiple feedbacks

Uplink signaling / inverse 1 0: not supported

Feed channel format 2 1 : Support

Support indication

STA DGI Requirement 2 0: Requires 2 OFDM symbols to protect

1 : Requires 4 OFDM symbols to protect

Protection

2~3: Reserved

STA UGI Requirement 2 0: Requires 2 OFDM symbols to protect

1 : Requires 4 OFDM symbols to protect

Protection

2~3: Reserved

Reserved 64, the default setting is 0. As shown in Table 9, the information carried by the frame body of the terminal basic capability negotiation request frame includes the following: 1) The number of STA antennas, which will be used in the process after accessing the wireless network. parameter.

2) The maximum working bandwidth of the STA, the STA reports its maximum working bandwidth, and the maximum working bandwidth can be used as one of the basis for the CAP to determine the target subchannel to be switched by the STA.

3) The STA supports spectrum aggregation. The CAP can be used to learn the situation that the STA supports spectrum aggregation. In the embodiment of the present invention, both STA and CAP may support 20MHz, 40MHz and 80MHz bandwidth, and the system includes four 20MHz subchannels, and the frequency aggregation mode 1 represents 20MHz, 40MHz. And 80MHz STAs can be scheduled to transmit independently on one or more 20MHz subchannels. Spectrum aggregation mode 2 represents multiple consecutive subchannel aggregations, with continuous spectrum, and 40MHz and 80MHz STAs can be continuously transmitted in the frequency domain on the aggregation channel.

4) The scheduling mechanism supported by the STA, through which the CAP can know the situation in which the STA supports the scheduling mechanism.

5) STA working subchannel mapping, this parameter indicates the available subchannels selected by the STA during the system synchronization process, and these subchannels can be used as one of the basis for the CAP to determine the target subchannel to be switched by the STA.

6) The maximum number of transmitted streams of the STA and the maximum number of received streams of the STA. The CAP can be used to know the number of supported streams and the number of received streams.

7) Indicates the MCS indication of the STA's MCS capability, by which the STA's MCS capability can be known.

8) A STA UEQM capability indication indicating the UE's non-equal modulation (UEQM) capability, by which the UE's UEQM capability can be known. The unequal modulation pointer here uses different modulation schemes for different traffic flows.

9) An LDPC capability indication indicating the LDPC capability of the STA, by which the LDPC capability of the STA can be obtained.

10) Indicates the STBC capability indication of the STA space-time coding capability. Through this parameter CAP, the STBC capability of the STA can be known.

11) A MU-MIMO indication of the STA indicating the MU-MIMO capability of the STA, by which the MU-MIMO capability of the STA can be obtained.

12) Subcarrier Grouping Ns feedback capability is that the STA reports to the CAP the number of subcarriers between each two feedbacks it supports.

13) The MIMO feedback mode combination supported by the STA is that the STA reports its own supported MIMO feedback mode combination to the CAP.

14) Uplink signaling/feedback channel format 2 support indication, where the uplink signaling/feedback channel format 2 indicates an uplink signaling/feedback channel supporting frequency division.

15) The DGI demand indication of the STA and the UGI demand indication of the STA.

The terminal basic capability negotiation request frame carries a plurality of parameters for the physical layer mode negotiation, including the STA supporting spectrum aggregation, the STA-supported scheduling mechanism, the STA maximum transmission stream number, the STA maximum received stream number, the STA UEQM capability indication, and the STA. MU-MIMO indication, uplink signaling/feedback channel format 2 support indication, STA's DGI demand indication, and STA's UGI requirement indication. This is because the physical layer mode in the EUHT system is very large, and the physical layer mode is performed in the capability negotiation phase. The negotiation facilitates the complexity of the constraint implementation.

After generating the terminal basic capability negotiation request frame, the STA may carry one or several parameters in Table 9 according to the application requirement, and then send the terminal basic capability negotiation request frame.

Optionally, after the basic capability negotiation request frame of the terminal is sent, the maximum waiting frame interval of the basic capability negotiation response frame of the terminal may be awaited. If the basic capability negotiation response frame is not received, the capability negotiation fails. Random access process.

Step 113: Receive the terminal basic capability negotiation response frame (SBC-RSP) sent by the CAP.

Before transmitting the basic capability negotiation response frame of the terminal, the CAP instructs to receive the downlink transmission resource of the basic capability negotiation response of the terminal.

In this embodiment, the terminal basic capability negotiation response is encapsulated in the terminal basic capability negotiation response frame. An example of the frame body carrying information of the terminal basic capability negotiation response frame is given in Table 10 below. Table 10 Name length (bit) value

STA ID 12 for other users

Working subchannel mapping 4 0001 : Subchannel 0

Shot 0010: Subchannel 1

0100: Subchannel 2

1000: Subchannel 3

Indicates a Bitmap or operation

40MHz and 80MHz terminals work in multiple 20MHz subchannels Spectrum aggregation mode 2 0 No aggregation

1. Aggregation mode 1 (discontinuous spectrum aggregation)

2. Aggregation mode 2 (continuous spectrum aggregation)

3 reserved

Scheduling mechanism 1 0 Time division scheduling only

1 reserved

MCS indication 1 ^\ 'i indicates STA Yes No Support

256-QAM

0 does not support 256-QAM

1 Support 256-QAM

UEQM indication 1 0 does not support UEQM

1 Support UEQM

LDPC indication 1 The encoding method supported by the STA:

0 does not support LDPC code length 1 ;

1 Support LDPC code length 1.

Tx STBC 1 0 is not supported

1 support

Rx STBC 1 0 not supported

1 support

STA maximum transmission 3 0 means the number of streams is 1

The number of streams 1 means that the number of 3⁄4 is 2

2 indicates that the number of streams is 3

3 indicates that the number of streams is 4

4 indicates that the number of streams is 5

5 indicates that the number of streams is 6

6 indicates that the number of streams is 7

7 means that the number of 3⁄4 is 8

STA maximum reception 3 0 indicates that the number of streams is 1

The number of streams 1 means that the number of 3⁄4 is 2

2 indicates that the number of streams is 3

3 indicates that the number of streams is 4

4 indicates that the number of streams is 5

5 indicates that the number of streams is 6

6 indicates that the number of streams is 7. 7 indicates that the number of streams is 8;

MU-MIMO 1 0: Not supported

1 : Support

Reserved 1 , the default setting is 0

Subcarrier grouping Ns 3 indicates the number of subcarriers in the group: Feedback capability 0: 1 (FPI=1) in the group

Subcarrier (not grouped);

1 : The group includes 2 ( FPI = 2 ) subcarriers;

2: 4 ( FPI = 4 ) subcarriers are included in the group;

3: The group includes 8 (FPI=8) subcarriers;

4: The group includes 16 (FPI=16) subcarriers;

5-7: Reserved.

Supported MIMO 3 000: Feedback not supported

Feedback mode combination 001 : CSI - MIMO feedback

010: BFM - MIMO feedback

100: Reserved

Confirm with Bitmap or operation

STA multiple feedback combination

Uplink signaling / feedback 1 0: Format 2 is not supported

Channel format 2 1 : Support format 2

Reserved 1 Default 0

STA DGI Requirement 2 0: Requires 2 OFDM symbols to protect

Protection

1 : 4 OFDM symbol protection required

2~3: Reserved

STA UGI Requirement 2 0: Requires 2 OFDM symbols to protect

Protection

1 : 4 OFDM symbol protection required

2~3: Reserved

Reserved 68 Default 0 As shown in Table 10, the information carried in the frame body of the terminal basic capability negotiation response frame includes the following:

1) The STA ID assigned to the STA in the CAP range. After the network is successfully accessed, the STA uses the STA ID to interact with the CAP. The TSTA ID assigned in the random access phase is invalid.

2) Working subchannel mapping, indicating the target subchannel to which the STA is to switch. The CAP may determine the parameter according to the STA maximum working bandwidth and the STA working subchannel mapping in the terminal basic capability request frame. Further, the CAP can report the maximum work reported by the STA according to the actual channel load and the like. The bandwidth is adjusted. For example, the STA reports its maximum working bandwidth to 80 MHz, and the CAP can be adjusted to 40 MHz or 20 MHz according to the actual situation. The CAP determines, as far as possible, the subchannel indicated by the STA working subchannel mapping in the terminal basic capability negotiation request frame as the target subchannel to be switched by the STA, and also refers to the maximum working bandwidth of the STA or the maximum working bandwidth of the adjusted STA. The final working subchannel mapping information is determined.

3) A spectrum aggregation mode, indicating a relationship between the target subchannels in the working subchannel mapping, where the spectrum aggregation mode is determined according to the STA support frequency aggregation carried in the terminal basic capability negotiation request frame.

4) The scheduling mechanism is determined according to the scheduling mechanism supported by the STA carried in the request frame of the basic capability negotiation request of the terminal.

5) The MCS indication information, the UEQM indication information, the LDPC indication information, the Tx STBC information, and the Rx STBC information are respectively determined according to various parameters carried in the terminal basic capability negotiation request frame. For example, if the STA supports 256QAM and the CAP does not support 256QAM, the CAP will not allow the STA to support 256QAM.

6) The maximum number of STAs to be transmitted and the number of STAs to be received are determined according to the maximum number of STAs to be transmitted and the maximum number of STAs to be received in the frame of the basic capability negotiation request.

7) MU-MIMO, the MU-MIMO determination supported by the STA carried in the request frame according to the basic capability negotiation of the terminal.

8) Subcarrier grouping The Ns feedback capability is determined according to the subcarrier carrier Ns feedback capability carried in the terminal basic capability negotiation request frame, and the STA can perform feedback every few subcarriers, thereby saving feedback overhead.

9) The supported MIMO feedback mode combination is determined according to the MIMO feedback mode combination supported by the STA carried in the terminal basic capability negotiation request frame, and multiple MIMO feedback modes can be used.

10) Uplink signaling/feedback channel format 2. The STA DGI requirement and the STA UGI requirement are determined according to the corresponding parameters carried in the terminal basic capability negotiation request frame.

After generating the basic capability negotiation response frame of the terminal, the CAP may carry one or several parameters in the table 10 according to the application requirement, and then send the basic capability negotiation response frame of the terminal.

In order for the CAP to know whether the STA correctly receives the terminal basic capability negotiation response frame, the STA may send an acknowledgment to the CAP when correctly receiving, and the STA may send an ACK. Alternatively, the embodiment of the present invention provides a group acknowledgement (GroupAck) mode, where the group confirmation frame includes a management control frame indicator bit, and further includes a bitmap corresponding to different service flows of the same user, where the STA may be in the foregoing management control frame. An indication indicating whether the terminal basic capability negotiation response is correctly received or not is filled in the indicator bit. After the data transmission based on the service flow, the STA can send the acknowledgement for the different service flows to the CAP together using the bitmap in the group acknowledgement frame.

Optionally, after the CAP is configured to send the basic capability negotiation response frame, the CAP waits for the maximum waiting frame interval of the basic capability negotiation response frame to be acknowledged. If the acknowledgment returned by the STA is not received, the capability negotiation fails.

Further, in the process of waiting for the maximum waiting frame interval of the terminal basic capability negotiation response frame acknowledgement, if the CAP has remaining downlink resources that can be allocated to the STA, the STA may retransmit the terminal basic capability negotiation response frame. In the case of a retransmission terminal basic capability negotiation response frame, the CAP waits for the maximum waiting frame interval of the terminal basic capability negotiation response frame acknowledgement only after transmitting the terminal basic capability negotiation response frame for the first time.

After the capability negotiation ends, the STA will switch to the target subchannel indicated by the CAP.

12 is a schematic structural diagram of a terminal-side device accessing a wireless network according to the present invention. The device includes: a device 121 for acquiring system synchronization, a random access terminal-side device 122, and a capability negotiation terminal-side device 123. The device 121 for acquiring system synchronization is used to perform a process of acquiring the system synchronization with the CAP.

The random access terminal side device 122 is configured to randomly access the CAP.

The capability negotiation terminal side device 123 is configured to perform capability negotiation with the CAP.

The device for acquiring system synchronization in the present invention includes: a module for acquiring synchronization, and the module for acquiring synchronization includes: a first detecting unit, a first analyzing unit, and a first acquiring unit.

The first detecting unit is configured to search for a physical frame on the current subchannel.

The first parsing unit is configured to parse the physical frame that is found by the first detecting unit

SICH and CCH, wherein the SICH indicates a structure of a physical frame, and the CCH indicates allocation of system resources.

The first acquiring unit is configured to obtain a system parameter from a physical frame that is searched by the first detecting unit by using a result of the parsing by the first parsing unit.

FIG. 13 is a schematic structural diagram of an apparatus for acquiring synchronization of a system according to an embodiment of the present invention. The apparatus includes: a module 131 for acquiring synchronization, and the module 131 for acquiring synchronization includes: a first detecting unit 1311, a first parsing unit 1312, and a first The acquiring unit 1313.

The first detecting unit 1311 is configured to search for a physical frame on the current subchannel.

The first parsing unit 1312 is configured to parse the SICH and the CCH in the physical frame that the first detecting unit 1311 finds, wherein the SICH indicates a structure of a physical frame, and the CCH indicates allocation of system resources.

The first obtaining unit 1313 is configured to obtain the system parameters from the physical frame found by the first detecting unit 1311 by using the result parsed by the first parsing unit 1312.

Further, after acquiring the system parameters, the first acquiring unit 1313 may trigger the first detecting unit 1311 to transfer to the next subchannel to continue searching for physical frames until each subchannel in the predetermined channel list is traversed.

Still further, the first obtaining unit 1313 may use all subchannels that have acquired the system parameters as available subchannels, and select any one of the subchannels therefrom.

As an alternative embodiment, the first detecting unit 1311 finds a physical frame by detecting the frame header of the physical frame on the current subchannel.

Further, when the first detecting unit 1311 does not detect the frame header on the current subchannel, it continues to perform detection until the waiting time of the subchannel is exceeded, and shifts to the next subchannel to continue searching for the physical frame.

As an optional embodiment, when the first parsing unit 1312 parses the SICH and the CCH is unsuccessful, the first detecting unit 1311 is triggered to continue to perform the operation, and when the waiting time of the subchannel is exceeded, the first detecting unit 1311 is triggered to move to the next. A subchannel continues to look for physical frames.

As an optional embodiment, the first obtaining unit 1313 detects a broadcast information frame BCF from the physical frame, and acquires system parameters from the BCF.

Further, when the first acquiring unit 1313 does not detect the BCF, the first detecting unit 1311 is triggered to continue to perform the operation until the waiting time of the subchannel is exceeded, and the first detecting unit 1311 is triggered to transfer to the next subchannel to continue searching for the physical frame.

The device for acquiring synchronization in the embodiment of the present invention further includes a module 132 for maintaining synchronization, and the module 132 for maintaining synchronization includes: a second detecting unit 1321, a second analyzing unit 1322, and a second obtaining unit 1323.

The second detecting unit 1321 is configured to continue to search for a physical frame on the selected subchannel.

The second parsing unit 1322 is configured to parse the SICH and the CCH in the physical frame sought by the second detecting unit 1321.

The second obtaining unit 1323 is configured to detect, by using the parsing result of the second parsing unit 1322, the BCF from the physical frame sought by the second detecting unit 1321 to obtain an ear system parameter. As a first alternative embodiment of the module 132 that maintains synchronization, the module 132 that maintains synchronization further includes: a SICH timer 1324, a BCF timer 1325, and a determining unit 1326.

The second detecting unit 1321 further starts the SICH timer 1324 and the BCF timer 1325 when starting to search for a physical frame.

The determining unit 1326 is configured to determine whether the second parsing unit 1322 successfully parses the SICH before the SICH timer 1324 times out, and if so, resets the SICH timer 1324, otherwise the module 131 that triggers the acquisition synchronization re-executes the operation according to the channel list; Determining whether the second obtaining unit 1323 detects the BCF before the BCF timer 1325 times out, and if so, resetting the BCF timer 1325, and triggering the second detecting unit 1321 to continue searching for the physical frame on the selected subchannel, otherwise triggering acquisition The synchronized module 131 re-executes operations in accordance with the channel list.

As a second alternative embodiment of the module 132 for maintaining synchronization, as with the structure shown in FIG. 13, the module 131 for maintaining synchronization further includes: a SICH timer 1324, a BCF timer 1325, and a judging unit 1326.

The determining unit 1326 is configured to determine whether the second parsing unit 1322 successfully parses the SICH before the SICH timer 1324 times out. If yes, reset the SICH timer 1324, otherwise the module 131 that triggers the acquisition synchronization starts with the selected subchannel. And re-performing the operation according to the channel list; determining whether the second obtaining unit 1323 detects the BCF before the BCF timer 1325 times out, and if so, resetting the BCF timer 1325, and triggering the second detecting unit 1321 to select the selected sub- The physical frame continues to be searched on the channel, otherwise the module 131 that triggers the acquisition synchronization starts with the selected subchannel and re-executes the operation according to the channel list.

On the basis of this, the first obtaining unit 1313 further triggers the synchronization-maintaining module 132 to re-execute the sub-channel as the selected sub-channel after acquiring the system parameters on one sub-channel in the process of re-executing the operation. .

As a third alternative embodiment of the module 132 that maintains synchronization, as shown in FIG. 14, the module 132 that maintains synchronization further includes: a SICH timer 1324, a BCF timer 1325, and a decision unit 1326.

The determining unit 1326 is configured to determine whether the second parsing unit 1322 successfully parses the SICH before the SICH timer 1324 times out, and if yes, resets the SICH timer 1324, otherwise triggers the first acquiring unit 1313 to reselect one of the available subchannels. Determining whether the second obtaining unit 1323 detects the BCF before the BCF timer 1325 times out, and if so, resetting the BCF timer 1325, and triggering the second detecting unit 1321 to continue searching for the physical frame on the selected subchannel, otherwise triggering The first obtaining unit 1313 reselects one of the available subchannels.

In the foregoing three optional embodiments of the module 132 for maintaining synchronization, if the application scenario limitation of the channel list expiration is considered, the device may further include a module for determining whether the channel list is expired, and the module may monitor the module 131 for acquiring synchronization. The operation starts counting after it completes the channel list scan. After the set time is reached, the result of the channel list expiration is obtained. Alternatively, if the terminal side itself has a module that determines whether the channel list has expired, the module 132 that maintains synchronization can directly utilize the result of whether the channel list derived by the module expires.

In the three alternative embodiments of the above-mentioned module 132 for maintaining synchronization, the second detecting unit 1321 may determine the start time of the next physical frame by using the SICH in the found current physical frame on the selected subchannel. The same structure and function in the three embodiments shown in Figs. 13 and 14 can be integrated in the same module that is kept in sync.

In order to achieve time synchronization with the CAP, the apparatus for acquiring system synchronization in the embodiment of the present invention may further include: a synchronization unit that establishes synchronization with the CAP by using a system common clock in the system parameter.

The first random access terminal side device provided by the present invention includes: a resource requesting unit, a random access requesting unit, and a random access response receiving unit.

The resource requesting unit is configured to send a random access sequence on any one of the subchannels.

The random access requesting unit is configured to send a random access request to the CAP by using the uplink transmission resource allocated by the CAP according to the random access sequence.

The random access response receiving unit is configured to receive a random access response sent by the CAP. As an optional embodiment, FIG. 15 is a schematic structural diagram of a device for a first random access terminal according to an embodiment of the present invention, where the device includes: a resource requesting unit 151, a random access requesting unit 152, and random access. The response receiving unit 153, the first trigger unit 154, the power control parameter reporting unit 155, the resource indication receiving unit 156, the second trigger unit 157, and the power control parameter adjusting unit 158.

The resource requesting unit 151 is configured to send a random access sequence on any one of the subchannels, and receive an indication of the uplink transmission resource by the CAP within a set number of frames after the random access sequence is sent, if no indication of the uplink transmission resource is received, Resend the random access sequence. The indication of the uplink transmission resource is carried in the system signaling, and the index of the random access sequence, the index of the frequency domain cyclic shift of the random access sequence, and the system frame number of the random access occurrence are identified. Further, the indication of the uplink transmission resource further carries a transmission timing advance amount.

The random access requesting unit 152 is configured to send a random access request to the CAP by using the uplink transmission resource allocated by the CAP according to the random access sequence. When the random access request unit 152 transmits a random access request to the CAP, the timing advance is performed in accordance with the transmission timing advance amount.

The random access response receiving unit 153 is configured to receive a random access response sent by the CAP. Further, the random access response may carry an access status indicating success or abandonment. When the access status indication is successful, the random access response may also carry the temporary target i allocated by the STA to which the device belongs in the CAP range. .

The first triggering unit 154 is configured to monitor the random access response receiving unit 153 within the set number of frames after the random access requesting unit 152 sends the random access request, if the random access response receiving unit 153 does not receive the random In response to the access, the trigger resource request unit 151 transmits a random access sequence.

The power control parameter reporting unit 155 is configured to notify the power control parameter reported by the random access request unit 152 for being carried in the random access request.

The resource indication receiving unit 156 is configured to receive an indication that the CAP sends a downlink transmission resource that sends the random access response. The indication of the downlink transmission resource is carried in the system signaling, and the index of the random access sequence, the random access sequence frequency i or the cyclically shifted index, and the system frame number identifier of the random access occurrence are used. .

The second triggering unit 157 is configured to compare the address carried in the random access response with the address of the associated STA. If not, the trigger resource requesting unit 151 resends the random access sequence to the CAP.

The power control parameter adjustment unit 158 is configured to adjust the power control parameter according to the power control parameter adjustment value in the random access response.

The first random access terminal side device in the embodiment of the present invention may include all the units shown in FIG. 15 , but may also include only the portion shown in FIG. 15 according to application requirements. The unit, therefore, Fig. 15 only shows an example of the structure of the random access terminal side device, and is not limited to its structure.

The second random access terminal side provided by the present invention includes: a random access request unit and a random access response connection unit.

The random access requesting unit is configured to send a random access request carrying a power control parameter to the CAP.

The random access response receiving unit is configured to receive a random access response sent by the CAP. Further, the second random access terminal side device of the present invention may further include: a resource requesting unit, configured to send a random access sequence to the CAP on any one of the subchannels, to request to send the uplink transmission resource of the random access request .

As an optional embodiment, the second random access terminal side device of the present invention may have an internal structure similar to that shown in FIG. 15, but there is no separate power control parameter reporting unit, and the random access request unit The random access request carrying the power control parameters is directly sent, and the functions of other units are the same.

The capability negotiation terminal side device in the present invention includes: a capability negotiation request unit and a capability negotiation response receiving unit.

The capability negotiation requesting unit is configured to send, by using an uplink transmission resource allocated by the CAP, a terminal basic capability negotiation request to the CAP.

The capability negotiation response receiving unit is configured to receive a terminal basic capability negotiation response that is sent by the CAP and carries the working subchannel mapping information. The above working subchannel mapping information indicates the target subchannel to which the STA is to handover.

FIG. 16 is a schematic structural diagram of a capability negotiation terminal side device according to an embodiment of the present invention. The device includes: a capability negotiation requesting unit 161, a capability negotiation response receiving unit 162, a confirming unit 163, a first triggering unit 164, a second triggering unit 165, and The configuration parameter providing unit 166.

The capability negotiation requesting unit 161 is configured to receive an allocation indication of the uplink transmission resource, and send, by using an uplink transmission resource allocated by the CAP, a terminal basic capability negotiation request to the CAP.

The capability negotiation response receiving unit 162 is configured to receive a terminal basic capability negotiation response that carries the working subchannel mapping information sent by the CAP. The above working subchannel mapping information indicates the target subchannel to which the STA is to handover. Further, the terminal basic capability negotiation response may further include spectrum aggregation mode information and/or an official identifier, where the spectrum aggregation mode information is used to indicate a relationship between the target subchannels, and the official identifier is that the STA is within the CAP range. The official identification of the distribution.

The confirming unit 163 is configured to send an acknowledgement to the CAP after the capability negotiation response receiving unit 162 correctly receives the terminal basic capability negotiation response.

The first triggering unit 164 is configured to: after the random access terminal side device completes the operation, the monitoring capability negotiation requesting unit 161, if the capability negotiation requesting unit 161 does not receive the indication of the uplink transmission resource, triggering the random access The terminal side device re-executes the operation.

The second triggering unit 165 is configured to: after the capability negotiation requesting unit 161 sends the terminal basic capability negotiation request, the monitoring capability negotiation response receiving unit 162, if the capability negotiation response receiving unit 162 does not receive the terminal basic capability negotiation response , triggering the random access terminal side device to perform the operation again.

The configuration parameter providing unit 166 is configured to provide the maximum working bandwidth of the STA to the capability negotiation request unit 161 for sending in the terminal basic capability negotiation request. Further, the configuration parameter providing unit 166 is further configured to provide the subchannel information available to the STA to the capability negotiation request unit 161 for sending in the terminal basic capability negotiation request.

The capability negotiation terminal side device in the embodiment of the present invention may include all the units shown in FIG. 16 , but may also include only some units shown in FIG. 16 according to application requirements. Therefore, Fig. 16 only shows an example of the structure of the capability negotiation terminal side device, and is not limited to its structure.

FIG. 17 is a schematic structural diagram of a network side device accessing a wireless network according to the present invention. The device includes: a system parameter sending device 171, a random access network side device 172, and a capability negotiation network side device 173.

The system parameter transmitting device 171 is configured to send system parameters.

The random access network side device 172 is configured to permit random access of the terminal side device.

The capability negotiation network side device 173 is configured to perform capability negotiation with the terminal side device.

The first random access network side device provided by the present invention includes: a resource allocation unit, a random access request receiving unit, and a random access response unit.

The resource allocation unit is configured to receive a random access sequence sent by the STA on any one of the subchannels, and allocate an uplink transmission resource according to the random access sequence.

The random access request receiving unit is configured to receive a random access request sent by the STA by using the uplink transmission resource.

The random access response unit is configured to send a random access response to the STA.

As an optional embodiment, FIG. 18 is a schematic structural diagram of a first random access wireless network side device according to an embodiment of the present invention, where the device includes: a resource allocation unit 181, a random access request receiving unit 182, and a random connection. The input response unit 183, the deleting unit 184, the access state determining unit 185, the temporary identification assigning unit 186, and the power control parameter adjustment value determining unit 187.

The resource allocation unit 181 is configured to receive a random access sequence sent by the STA on any one of the subchannels, and allocate an uplink transmission resource according to the random access sequence; send an indication of the uplink transmission resource; Allocating a downlink transmission resource, and transmitting the indication of the downlink transmission resource. The indication of the uplink transmission resource is carried in the system signaling, and the index of the random sequence, the index of the frequency domain cyclic shift of the random access sequence, and the system frame number of the random access occurrence are identified. Further, the indication of the uplink transmission resource further carries a transmission timing advance amount, and indicates a timing advance amount at the time of uplink transmission. The indication of the downlink transmission resource is carried in the system signaling, and is identified by an index of the random access sequence, an index of the random access sequence frequency or cyclic shift, and a system frame number generated by random access.

The random access request receiving unit 182 is configured to receive a random access request sent by using the uplink transmission resource.

The random access response unit 183 is configured to send a random access response to the STA.

The deleting unit 184 is configured to monitor the random access request receiving unit 182 within the set number of frames after the resource allocation unit 181 receives the random access sequence sent by the STA, if the random access request receiving unit 182 does not receive the Describe the random access request sent by the STA, delete all the information corresponding to the STA, or delete the information corresponding to the random access sequence.

The access state determining unit 185 is configured to determine, according to the measurement result of the uplink signal, that the access state of the STA is successful or abandoned, and send the access state to the random access response unit 183, where it is carried in the random connection. Sent in the response.

The temporary identifier assigning unit 186 is configured to allocate a temporary identifier to the STA within its own range when the access state determining unit 185 determines that the access status indication is successful, and send the temporary identifier to the random access response unit 183 for providing The bearer is sent in the random access response.

The power control parameter adjustment value determining unit 187 is configured to determine a power control parameter adjustment value according to the reported power control parameter carried in the random access request received by the random access request receiving unit 182, and send the power control parameter adjustment value to The random access response unit 183 is configured to be carried in the random access response. The random access network side device in the embodiment of the present invention may include all the units shown in FIG. 18, but may also include only some of the units shown in FIG. 18 according to application requirements, so FIG. 18 only gives An example of the structure of the random access network side device is not limited to its structure.

The second random access network side device provided by the present invention includes: a random access request receiving unit and a random access response unit.

The random access request receiving unit is configured to receive a random access request that carries a power control parameter sent by the STA.

Further, the second random access network side device of the present invention may further include: a resource allocation unit, configured to receive a random access sequence sent by the STA on any one of the subchannels, and allocate the random access sequence according to the random access sequence Sending an uplink transmission resource of the random access request.

As an alternative embodiment, the internal structure of the second random access network side device provided by the embodiment of the present invention is the same as that shown in FIG. 18, and the functions of each unit are similar.

The network side device for accessing a wireless network provided by the present invention refers to a capability negotiation network side device.

The capability negotiation network side device in the present invention comprises: a capability negotiation request receiving unit and a capability negotiation response unit.

The capability negotiation request receiving unit receives a terminal basic capability negotiation request sent by the STA by using the allocated uplink transmission resource.

The capability negotiation response unit sends a terminal basic capability negotiation response carrying the working subchannel mapping information, where the working subchannel mapping information indicates the target subchannel to which the STA is to be handed over.

FIG. 19 is a schematic structural diagram of a capability negotiation network side device according to an embodiment of the present invention. The device includes: a capability negotiation request receiving unit 191, a capability negotiation response unit 192, an acknowledgment receiving unit 193, a monitoring unit 194, a resource allocation unit 195, and a working device. The channel mapping information determining unit 196, the spectrum aggregation mode information providing unit 197, and the official identification assigning unit 198.

The capability negotiation request receiving unit 191 receives the terminal basic capability negotiation request sent by the STA by using the allocated uplink transmission resource.

The capability negotiation response unit 192 transmits a terminal basic capability negotiation response carrying the working subchannel mapping information, where the working subchannel mapping information indicates the target subchannel to which the STA is to be handed over.

The acknowledgment receiving unit 193 is configured to receive an acknowledgment sent by the STA after correctly receiving the basic capability negotiation response of the terminal.

The monitoring unit 194 is configured to monitor the acknowledgment receiving unit 193 after the capability negotiation response unit 192 sends the terminal basic capability negotiation response, and if the acknowledgment receiving unit 193 does not receive the acknowledgment, notify the capability negotiation request receiving unit 191. The capability negotiation response unit 192 ends this operation. Further, before being triggered by the monitoring unit 194, the capability negotiation response unit 192 may resend the terminal basic capability negotiation response to the STA.

The resource allocation unit 195 is configured to allocate, by the STA, an uplink transmission resource that sends a basic capability negotiation request of the terminal, and send an allocation indication of the uplink transmission resource.

The working subchannel mapping information determining unit 196 is configured to determine the working subchannel mapping information, and send the working subchannel mapping information to the capability negotiation response unit 192 for being carried in the terminal basic capability negotiation response. The sum of the bandwidths of the target subchannels indicated by the determined working subchannel mapping information is less than or equal to the maximum working bandwidth of the STA. On the basis of the above, the working subchannel mapping information determining unit 196 may further adjust the maximum working bandwidth of the STA carried in the terminal basic capability negotiation request, and at this time, the working subchannel mapping information indicates the target subchannel. The sum of the bandwidths is less than or equal to the adjusted maximum operating bandwidth of the STA. on the basis of, Further, the target subchannel indicated by the working subchannel mapping information determined by the working subchannel mapping information determining unit 196 includes one or more available subchannels of the STA.

The spectrum aggregation mode information providing unit 197 is configured to provide the frequency negotiation mode information indicating the relationship between the target subchannels to the capability negotiation response unit 192 for being carried in the terminal basic capability negotiation response.

The official identity assigning unit 198, the STA for the basic capability negotiation request of the sending terminal allocates an official identifier in its own range, and sends the formal identifier to the capability negotiation response unit 192 for carrying the basic capability negotiation response of the terminal. Sent in. The official identification assigning unit 198 can obtain the information of the STA that is currently requesting capability negotiation from the capability negotiation request receiving unit 191, and assign an official identifier to the STA within its own scope.

The capability negotiation network side device in the embodiment of the present invention may include all the units shown in FIG. 19, but may also include only some of the units shown in FIG. 19 according to application requirements, so FIG. 19 only gives An example of the structure of the capability negotiation network side device is not limited to its structure.

FIG. 20 is a flowchart of a method for accessing a wireless network according to the present invention. The method includes: Step 201: Generate a basic capability negotiation request of a terminal that carries a maximum working bandwidth of the STA, where the maximum working bandwidth of the STA indicates the maximum of the STA. Working bandwidth

Step 202: Send the terminal basic capability negotiation request.

Further, the foregoing terminal basic capability negotiation request is encapsulated in the terminal basic capability negotiation request frame. 21 is a flow chart of another method for accessing a wireless network in the present invention, the method including:

Step 211: Generate a terminal basic capability negotiation request that carries a STA working subchannel mapping, where the STA working subchannel mapping indicates a subchannel available to the STA.

Step 212: Send the terminal basic capability negotiation request.

Further, the foregoing terminal basic capability negotiation request is encapsulated in the terminal basic capability negotiation request frame. FIG. 22 is a method for accessing a wireless network according to another aspect of the present invention, the method includes: Step 221: Generate a terminal basic capability negotiation response that carries the working subchannel mapping information, so that the STA that receives the basic capability negotiation response of the terminal Switching to the target subchannel according to the working subchannel mapping information;

Step 222: Send the terminal basic capability negotiation response.

Corresponding to the four methods for accessing a wireless network shown in FIG. 20 to FIG. 22, the present invention further provides four devices for accessing a wireless network, each of which includes a generating unit and a sending unit, where the generating unit The information in the generation step in the corresponding method is generated, and the transmitting unit transmits the information generated by the generating unit.

It is understood that the specific order or hierarchy of steps in the process disclosed is an example of the exemplary method. Based on a design preference, it is understood that the specific order or hierarchy of steps in the process can be rearranged without departing from the scope of the disclosure. The appended method claims present elements of the various steps in the exemplary order and are not intended to

In the above Detailed Description, various features are grouped together in a single embodiment to facilitate the present disclosure. This method of disclosure should not be interpreted as reflecting the intent that the embodiments of the claimed subject matter require more features than those set forth in the claims. Rather, as the following claims reflect, the invention is in a <RTIgt; Therefore, the following claims are hereby expressly incorporated into the claims

The above description includes examples of one or more embodiments. Of course, it is not possible to describe all possible combinations of components or methods for the purposes of describing the above embodiments, but one of ordinary skill in the art It should be appreciated that various embodiments may be further combined and arranged. Accordingly, the embodiments described herein are intended to cover all such modifications, modifications, and variations in the scope of the appended claims. Furthermore, the term "comprising", which is used in the specification or the claims, is intended to cover the term "comprising", as the meaning of "comprising," as used in the claims. Furthermore, any term "or" used in the specification of the claims is intended to mean "non-exclusive or".

Claims

Claim

A method for accessing a wireless network, the method comprising: transmitting, by using an uplink transmission resource allocated by a central access point CAP, a terminal basic capability negotiation request to the CAP;

2. The method according to claim 1, further comprising: after correctly receiving the terminal basic capability negotiation response, sending an acknowledgement to the CAP.

3. The method of claim 1, further comprising: receiving an allocation indication of the uplink transmission resource.

The method according to claim 3, further comprising: waiting for a set number of frames after the random access procedure performed before the transmitting the basic capability negotiation request is completed, if the allocation indication is not received, Performing the random access procedure.

The method according to claim 1, further comprising: waiting for a set number of frames after transmitting the basic capability negotiation request of the terminal, and re-executing the basic capability of the transmitting terminal if the basic capability negotiation response of the terminal is not received The random access procedure before the negotiation request.

The method according to claim 1, wherein the terminal basic capability negotiation response further carries spectrum aggregation mode information and/or an official identifier;

The method according to claim 1, wherein the terminal basic capability negotiation request carries a maximum working bandwidth of the STA.

The method according to claim 7, wherein the terminal basic capability negotiation request further carries the subchannel information available to the STA.

A method for accessing a wireless network, the method comprising: receiving a terminal basic capability negotiation request sent by a STA by using an allocated uplink transmission resource; and transmitting, by the STA, a terminal carrying working subchannel mapping information The basic capability negotiation response, the working subchannel mapping information indicating a target subchannel to which the STA is to handover.

10. The method of claim 9, further comprising: receiving an acknowledgment sent by the STA after correctly receiving the terminal basic capability negotiation response.

11. The method according to claim 10, further comprising: waiting for a set number of frames after transmitting the terminal basic capability negotiation response, and ending the process if the confirmation is not received.

The method according to claim 11, wherein the terminal basic capability negotiation response is resent to the STA within the set number of frames.

The method according to claim 9, further comprising: allocating the uplink transmission resource, and sending an indication of the uplink transmission resource to the STA.

The method according to claim 9, wherein the terminal basic capability negotiation response further carries spectrum aggregation mode information and/or an official identifier;

The method according to claim 9, wherein the terminal basic capability negotiation request carries a maximum working bandwidth of the STA; The method further includes: determining the working subchannel mapping information;

16. The method according to claim 15, further comprising: adjusting a maximum working bandwidth of the STA;

The method according to claim 15 or 16, wherein the terminal basic capability negotiation request further carries the subchannel information available to the STA;

The method according to claim 1 or 9, wherein the working subchannel mapping information uses a bit bitmap to indicate one or more target subchannels.

A terminal device for accessing a wireless network, the device comprising: a capability negotiation requesting unit, configured to send a terminal basic capability negotiation request to the CAP by using an uplink transmission resource allocated by the CAP;

The device according to claim 19, further comprising: an acknowledgment unit, configured to send an acknowledgement to the CAP after the capability negotiation response receiving unit correctly receives the terminal basic capability negotiation response .

The device according to claim 19, wherein the capability negotiation requesting unit further receives an allocation indication of the uplink transmission resource.

The device according to claim 21, further comprising: a first triggering unit, configured to monitor the capability negotiation request unit within a set number of frames after the random access terminal side device completes the operation And if the capability negotiation requesting unit does not receive the allocation indication, triggering the random access terminal side device to perform the operation again.

The device according to claim 19, further comprising: a second triggering unit, configured to monitor within a set number of frames after the capability negotiation requesting unit sends the terminal basic capability negotiation request The capability negotiation response receiving unit, if the capability negotiation response receiving unit does not receive the terminal basic capability negotiation response, triggers the random access terminal side device to perform the operation again.

The device according to claim 19, wherein the terminal basic capability negotiation response further carries spectrum aggregation mode information and/or an official identifier;

The device according to claim 19, further comprising: a configuration parameter providing unit, configured to provide a maximum working bandwidth of the STA to the capability negotiation request unit, for the basic capability of the terminal Sent in the negotiation request.

The device according to claim 25, wherein the configuration parameter providing unit is further configured to provide the subchannel information available to the STA to the capability negotiation requesting unit for negotiating basic capabilities of the terminal. Sent in the request.

A network side device for accessing a wireless network, the device comprising: a capability negotiation request receiving unit, and receiving a terminal basic capability negotiation request sent by the STA by using the allocated uplink transmission resource; The capability negotiation response unit sends a basic capability negotiation response carrying the working subchannel mapping information to the STA, where the working subchannel mapping information indicates a target subchannel to be switched by the STA.

The device according to claim 27, wherein the device further comprises: an acknowledgment receiving unit, configured to receive an acknowledgement sent by the STA after correctly receiving the terminal basic capability negotiation response.

The device according to claim 28, further comprising: a monitoring unit, configured to monitor the number of frames after the capability negotiation response unit sends the terminal basic capability negotiation response The acknowledgment receiving unit, if the acknowledgment receiving unit does not receive the acknowledgment, triggers the capability negotiation requesting unit and the capability negotiation response unit to end the current operation.

30. The apparatus of claim 29, wherein the capability negotiation response unit resends the terminal basic capability negotiation response to the STA before being triggered by the monitoring unit.

The method according to claim 27, wherein the device further comprises: a resource allocation unit, configured to allocate, to the STA, an uplink transmission resource that sends a basic capability negotiation request of the terminal, and send the uplink transmission resource Assignment instructions.

The device according to claim 27, further comprising: a spectrum aggregation mode information providing unit and/or an official identification assigning unit;

The device according to claim 27, further comprising: a working subchannel mapping information determining unit, configured to determine the working subchannel mapping information, and send the working subchannel mapping information And the capability negotiation response unit is sent for being carried in the terminal basic capability negotiation response;

The device according to claim 33, wherein the working subchannel mapping information determining unit further adjusts a maximum working bandwidth of the STA carried in the terminal basic capability negotiation request;

The apparatus according to claim 33 or 34, wherein the target subchannel indicated by the working subchannel mapping information includes one or more available subchannels of the STA.

36. The apparatus of claim 19 or 27, wherein the working subchannel mapping information indicates one or more target subchannels using a bitmap.