WO2012130026A1

WO2012130026A1 - Method and device for accessing wireless network

Info

Publication number: WO2012130026A1
Application number: PCT/CN2012/072051
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: CN103548411B; CN102595635A; CN103548411A

Abstract

A method for accessing a wireless network comprises: sending a random access sequence to a central access point CAP over any sub-channel; sending a random access request to the CAP by using uplink transmission resources allocated by the CAP according to the random access sequence; and receiving a random access response sent by the CAP. Further disclosed is a 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, the priority of the invention is "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 201110189226.7, 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 16, 2012, the application number is 201210035697.7, 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 201210050642.3, 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 between different STAs. The CSMA/CA mechanism will compete for the right to use radio resources, and at the same time compete for the wireless channel. At this time, collision will occur, resulting in waste of radio resources. In order to avoid collisions, the CSMA/CA mechanism requires the CAP or STA 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 (similar to Wi-Fi), 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, which reduces the processing power of the device and reduces 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 needs, such as: browsing web pages, mobile video, mobile games, etc., it is difficult to achieve business needs and resources. Dynamic adaptation of the partition. Compared with Wi-Fi, since Femto uses a scheduling-based centralized control mechanism, there is no waste of radio resources due to competition conflict and random backoff between the base station or the CAP and the terminal or the terminal, 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:

Sending a random access sequence to the central access point CAP on any one of the subchannels;

And using the CAP to send a random access request to the CAP according to the uplink transmission resource allocated by the random access sequence;

Receiving a random access response sent by the CAP.

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

Sending a random access request carrying a power control parameter to the CAP;

Receiving a random access response sent by the CAP.

Further, it also includes:

Sending 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.

In an embodiment, the method further includes: waiting for the set number of frames after transmitting the random access sequence, and resending the random access sequence to the CAP if the CAP does not receive the indication of the uplink transmission resource.

Optionally, the indication of the uplink transmission resource is carried in the system signaling, and the index of the random access sequence, the frequency domain cyclic shift index of the random access sequence, and the system frame generated by the random access are used. The number is only.

Optionally, the indication of the uplink transmission resource further carries a transmission timing advance amount;

When the random access request is sent, the timing advance is performed according to the transmission timing advance amount. In an embodiment, the method further includes: waiting for a set number of frames after sending the random access request, and resending the random access sequence to the CAP if the random access response is not received. Optionally, receiving an indication that the CAP sends a downlink transmission resource that sends the random access response.

Optionally, the indication of the downlink transmission resource is carried in system signaling, and an index of the random access sequence, an index of a frequency domain cyclic shift of the random access sequence, and a system frame generated by random access are used. The number is only.

In an embodiment, the random access response carries an address;

The method further includes: comparing the address carried in the random access response with the to-be-matched address, and if not, re-sending the random access sequence to the CAP.

In an embodiment, the random access response carries an access status indicating success or abandonment. Optionally, when the access status indication is successful, the random access response further carries a temporary identifier allocated in the CAP range.

In an embodiment, the random access response carries a power control parameter adjustment value, and the power control parameter adjustment value is determined according to a power control parameter carried in the random access request.

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

Receiving a random access sequence sent by the STA on any one of the subchannels;

Allocating an uplink transmission resource according to the random access sequence;

Receiving a random access request sent by the STA by using the uplink transmission resource;

Sending a random access response to the STA.

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

Receiving a random access request that carries a power control parameter sent by the STA;

Sending a random access response to the STA.

Optionally, it also includes:

Receiving a random access sequence sent by the STA on any one of the subchannels, and allocating an uplink transmission resource for transmitting the random access request according to the random access sequence.

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

Optionally, 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 random access sequence frequency shift, and random access occur. System frame number identification.

Optionally, the indication of the uplink transmission resource further carries a timing advance of the transmission, indicating a timing advance amount when the uplink is transmitted.

In an embodiment, the method further includes: waiting to set the number of frames after receiving the random access sequence, deleting all the information corresponding to the STA, or deleting the random connection if the random access request is not received Enter the information corresponding to the sequence.

In an embodiment, the method further includes: allocating a downlink transmission resource for the random access response, and sending the indication of the downlink transmission resource.

Optionally, the indication of the downlink transmission resource is carried in the system signaling, and uses an index of the random access sequence, an index of the random access sequence frequency domain, a cyclic shift, and a system frame generated by random access. No. logo.

In an embodiment, the method further includes: determining, according to the measurement result of the uplink signal, that the access status of the STA is successful or abandoned, and is carried in the random access response.

Optionally, when determining that the access status is successful, the method further includes: assigning a temporary identifier to the STA in its own range, and identifying the STA before accessing the wireless network.

In an embodiment, the method further includes: determining, according to the power control parameter carried in the random access request, a power control parameter adjustment value, and carrying the value in the random access response.

A terminal side device for accessing a wireless network, the device comprising: a resource requesting unit, configured to send a random access sequence to the CAP on any one of the subchannels, where the random access requesting unit is configured to send, by using the uplink transmission resource allocated by the CAP according to the random access sequence, to the CAP Access request

And a random access response receiving unit, configured to receive a random access response sent by the CAP. In one embodiment, the apparatus further includes:

And a power control parameter reporting unit, configured to notify the random access request unit of the power control parameter to be reported, for being carried in the random access request.

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

a random access requesting unit, configured to send a random access request carrying a power control parameter to the CAP;

And a random access response receiving unit, configured to receive a random access response sent by the CAP. In an embodiment, the apparatus further includes: 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.

In an embodiment, the resource requesting unit is further configured to receive, by the CAP, an indication of the uplink transmission resource within a set number of frames after the random access sequence is sent, if the uplink transmission resource is not received. Instructed to resend the random access sequence.

Optionally, 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 random access sequence frequency cyclic shift, and random access occur. System frame number identification.

When the random request unit sends a random access request to the CAP, the random request unit performs timing advance according to the transmission timing advance amount.

In an embodiment, the apparatus further includes: a first triggering unit, configured to monitor the random access response receiving unit within a set number of frames after the random access requesting unit sends a random access request, if The random access response receiving unit does not receive the random access response, and triggers the resource request unit to resend the random access sequence.

In one embodiment, the apparatus further includes:

And a resource indication receiving unit, configured to receive, by the CAP, an indication of a downlink transmission resource that sends the random access response.

In an embodiment, the random access response carries an address;

The device further includes: a second triggering unit, configured to compare an address carried in the random access response with an address of the associated STA, and if not, trigger the resource requesting unit to resend the random access sequence to the CAP.

In an embodiment, the random access response carries an access status indicating success or abandonment. Optionally, when the access status indication is successful, the random access response further carries a temporary identifier that is allocated by the STA in the CAP range;

The temporary identity is used to identify the STA prior to accessing the wireless network.

In an embodiment, the random access response further includes a power control parameter adjustment value, and the power control parameter adjustment value is determined according to a power control parameter carried in the random access request.

Optionally, the power control parameter includes: a current transmit power and a power adjustment margin of the associated STA;

The power control adjustment value includes: an adjustment value of a transmit power of the STA. A network side device for accessing a wireless network, the device comprising:

a resource allocation unit, 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;

a random access request receiving unit, configured to receive a random access request sent by the STA by using the uplink transmission resource;

And a random access response unit, configured to send a random access response to the STA.

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

a random access request receiving unit, configured to receive a random access request that carries a power control parameter sent by the STA;

Optionally, the device further includes: a resource allocation unit, configured to receive on any one of the subchannels

And a random access sequence sent by the STA, and allocating an uplink transmission resource for sending the random access request according to the random access sequence.

In an embodiment, the resource allocation unit is further configured to send an indication of the uplink transmission resource.

Optionally, the indication of the uplink transmission resource is carried in system signaling, and an index of the random sequence, an index of a frequency domain cyclic shift of the random access sequence, and a system frame generated by random access are used. The number is only.

In an embodiment, the apparatus further includes: a deleting unit, configured to monitor the random access request receiving unit within a set number of frames after the resource allocation unit receives the random access sequence sent by the STA, If the random access request receiving unit does not receive the random access request sent by the STA, delete all information corresponding to the STA, or delete information corresponding to the random access sequence.

In an embodiment, the resource allocation unit is further configured to allocate a downlink transmission resource to the random access response, and send the indication of the downlink transmission resource.

In an embodiment, the apparatus further includes: an access status determining unit, configured to determine, according to the measurement result of the uplink signal, that the access status of the STA is successful or abandoned, and send the access status to the random The access response unit is configured to be carried in a random access response.

Optionally, the device further includes: a temporary identifier allocation unit;

The temporary identifier allocation unit is configured to: when the access state determining unit determines that the access state is successful, allocate the temporary identifier to the STA in its own range, and send the temporary identifier to the random access. And the response unit is configured to be sent in a random access response; the temporary identifier is used to identify the STA before accessing the wireless network.

In an embodiment, the apparatus further includes: a power control parameter adjustment value determining unit, configured to use the power control parameter carried in the random access request received by the random access request receiving unit, to determine a power control parameter adjustment value, and And transmitting the power control parameter adjustment value to the random access response unit, where the bearer is sent in a random access response.

Optionally, the power control parameter includes: a current transmit power and a transmit power adjustment margin of the STA;

The power control parameter adjustment value is: an adjustment value of the transmit power of the STA.

A method for creating a network, including: Select a channel;

Detecting wireless signal energy on the channel during a detection period;

If the time of the energy of the wireless signal on the channel is less than or equal to the threshold value, if the time is greater than or equal to the set time length, the channel is determined to be a channel that can be used to create a network; wherein the set time length is less than or Equal to the detection period.

A method for creating a network, including:

Select a channel;

Detecting wireless signal energy on the channel during a detection period;

If the average value of the energy of the wireless signal on the channel is less than or equal to the threshold value, the channel is determined to be a channel that can be used to create a network, where the set time length is less than Or equal to the detection period.

A method for creating a network, including:

Detecting energy of a wireless signal on each of the plurality of channels;

Determining a channel whose wireless signal energy is less than or equal to a threshold as an available channel;

Create a network on at least one available channel.

In one embodiment, the energy of the wireless signal on each of the plurality of channels is detected one by one.

In one embodiment, the energy of the wireless signal on the channel is detected for each channel during a set detection period.

In one embodiment, the condition for determining that the wireless signal energy is less than or equal to the threshold is: the time when the energy of the wireless signal on the channel is less than or equal to the threshold is greater than or equal to the set time length.

In an embodiment, the determining that the wireless signal energy is less than or equal to the threshold is: the average value of the energy of the wireless signal on the channel is less than or equal to the threshold within a set time length.

A method for creating a network, including:

Determining a list of channels to be detected;

Selecting an undetected channel from the channel list in order;

Detecting wireless signal energy on the selected channel and starting a detection cycle timer;

During the detection period, if the detected signal energy is lower than the preset threshold, the channel is added to the available channel list, and other undetected channels are continuously detected until all the channels in the channel list are detected;

During the detection period, if the detected signal energy exceeds the preset threshold, the scanning of other channels that have not been detected continues until all channels in the channel list are detected;

After all channels in the channel list are all detected, if there is an available channel in the available channel list, the network creation process is started; otherwise, the detection is restarted after a delay.

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

Generating a random access request, where the random access request carries a power control parameter; and sending the random access request.

Further, the random access request is encapsulated in a random access request frame.

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

Generating a random access response, where the random access response carries a power control parameter adjustment value; and sending the random access response.

Further, the random access response is encapsulated in a random access response frame.

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

And generating a random access response, where the random access response carries a temporary identifier that is allocated by the STA that receives the random access response, and the temporary identifier is used to identify the STA before the access to the wireless network succeeds; Sending the random access response.

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

Generating a random access response, where the random access response carries an access status, and the access status indicates an access situation of the STA that receives the random access response;

Sending the random access response.

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 first random access method in the present invention;

3 is a flow chart of a second method for random access in the present invention;

Figure 4 is a reference model of an enhanced ultra-high speed wireless local area network (EUHT) system;

Figure 5 shows the composition of the access system of the EUHT system;

6 is a schematic diagram of a process of transmitting and receiving protocol data between a STA and a CAP; FIG. 7 is a flowchart of a method for acquiring system synchronization in an embodiment of the present invention;

FIG. 8 is a flowchart of a method for a STA to maintain downlink synchronization according to an embodiment of the present invention; FIG.

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

FIG. 10 is a schematic diagram of sending a random access sequence according to an embodiment of the present invention; FIG.

FIG. 11 is a flowchart of three uplink random access channels according to an embodiment of the present invention; FIG. 12 is a flowchart of a method for capability negotiation according to an embodiment of the present invention;

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

FIG. 14 is a schematic structural diagram of an apparatus for acquiring system synchronization according to an embodiment of the present invention; FIG. 15 is another schematic structural diagram of an apparatus for acquiring system synchronization according to an embodiment of the present invention; FIG. 17 is a schematic structural diagram of a capability negotiation terminal side device according to an embodiment of the present invention;

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

FIG. 19 is a schematic structural diagram of a first random access network side device according to an embodiment of the present invention; FIG. 20 is a schematic structural diagram of a capability negotiation network side device according to an embodiment of the present invention;

21 is a flow chart of a method for creating a network in the first embodiment of the present invention;

22 is a flow chart of a second method for creating a network in the present invention;

23 is a flow chart of a third method for creating a network in the present invention;

24 is a flow chart of a fourth method for creating a network in the present invention;

25 is a flowchart of a method for creating a network according to an embodiment of the present invention;

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

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

28 is a flowchart of a third method for accessing a wireless network in the present invention;

29 is a flow chart of a fourth 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 can vary. Portions and features of some embodiments may be included or substituted for parts 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. These embodiments of the invention may be referred to herein, individually or collectively, by the term "invention", merely for convenience, and if more than one invention is disclosed, it is not intended to automatically limit the application. The scope is 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 the random access process in the process of accessing the wireless network.

The present invention provides two methods of random access.

2 is a flowchart of a first random access method according to the present invention, where the process includes:

Step 21: ^ Any one of the subchannels sends a random access sequence to the CAP.

Any subchannel in this step is determined when the acquisition system synchronization is completed, and the specific determination method is described in detail later.

Step 22: The foregoing CAP sends a random access request to the CAP according to the uplink transmission resource allocated by the random access sequence.

Step 23: Receive the random access response sent by the CAP.

It can be seen that, in the first random access method of the present invention, a random access sequence is sent on any one of the subchannels to request an uplink transmission resource, so that multiple STAs can be dispersed in different subchannels to send random access sequences without Competing for a sub-channel request to send an uplink transmission resource of a random access request reduces the probability of collision occurrence and improves the success rate of accessing the wireless network.

3 is a flowchart of a method for second random access in the present invention, where the process includes:

Step 31: Send a random access request carrying a power control parameter to the CAP.

Step 32: Receive a random access response sent by the CAP.

It can be seen that, in the second random access method of the present invention, the power control parameter is carried in the random access request, so that the requesting end can perform power control, thereby eliminating the process of separately performing the power control, saving the process, and simplifying the process. operating.

Before the optional embodiment of the method of the present invention is described in detail, an application scenario of the optional embodiment is first given. The application scenario is only a specific example, and does not limit the scope of protection of the present invention.

Figure 4 shows the reference model for the EUHT system.

The system reference model shown in Figure 4 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: Mainly 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 mechanism for mapping 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 the PHY layer service.

Figure 5 shows the access system of the EUHT system, including the central access point (CAP) and the station (STA), where the STA can be various data devices, such as: PDA, notebook, camera, camera, mobile phone, tablet and pad. Wait. As shown in Figure 5, STA1 and STA2 access the CAP through the air interface protocol. The CAP establishes communication with the existing external network (such as IP backbone network, Ethernet) through wired or wireless. The protocol component 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. 5, FIG. 6 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 examples may use the system setup parameters as shown in Table 1, which gives a unified introduction.

Table 1

As an optional embodiment, the step of acquiring system synchronization in the process shown in FIG. 1 , that is, 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 the present invention achieves acquisition system synchronization for the case where the physical frame structure can be dynamically configured.

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

The system synchronization is obtained in the embodiment of the present invention, and includes the process of acquiring synchronization shown in FIG. 7. The process of acquiring synchronization includes:

Step 71: Find a physical frame on the current subchannel. Specifically, determine whether a frame header of the physical frame is detected on the current subchannel. If yes, go to step 72, otherwise continue to perform detection until the subchannel waiting time is exceeded. , Transfer to the next subchannel to continue to step 71.

Step 72: It is judged whether the SICH and CCH in the physical frame can be parsed, and if yes, step 73 is performed, otherwise step 71 is continued, until the waiting time of the subchannel is exceeded, and the process proceeds to the next subchannel to continue to step 71.

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. As an example, 6 bits can be used in SICH. A maximum of 63 OFDM symbols can be indicated, and one OFDM symbol is a minimum resource allocation unit, for example, the 6 bits are 010000, and the conversion to a 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. b ₃ b ₂ b, when b _{0 is} 0000, it is determined as the downlink signaling/feedback channel resource indication. If 0 is taken, it is determined that there is a BCF frame, _{6 5} - ₂ indicates the location of the resource, and ^ ₇ indicates the length of the resource.

Step 73: Determine whether a broadcast information frame (BCF) is detected, if yes, implement downlink synchronization, otherwise return to step 71 until the waiting time of the subchannel is exceeded, and then proceed to step 71 to proceed to the next subchannel.

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 Ground 48

Unique identifier of the CAP

Address

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;

2 indicates 3 antennas;

Antenna at the CAP end

3 means 4 antennas;

Configuration

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, the maximum length is 31 Network alias

byte.

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

Initialized system synchronization, unit us.

BCF Interval 16 indicates the time period in which the BCF frame appears, in ms. Random access backoff 4 For the random access backoff window control, the minimum window takes the minimum window value range 0~2n-l

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

Random access backoff 8 For the random access backoff window control, the maximum window takes the maximum window value range 0~2n-l

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

8 indicates the current transmit power of the CAP

CAP Transmit Work This field corresponds to the signed decimal number n, rate n=- 128- 127 (negative part is represented in complement form):

The CAP transmit power is "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

Set. This field corresponds to the position where the decimal number is n, n=0~255,

The line detection channel divides the DL-TCH channel into two parts. The latter part has a total of 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 Demodulation Pilot Time i or Number of Interval OFDM Symbols (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 letter 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:

1) The MAC address of the CAP, the STA can identify the CAP that sent the BCF according to the MAC address. 2) The working channel number and working bandwidth of the CAP. In combination with the working channel number and working bandwidth, the STA can determine other working subchannels of the CAP that broadcast the BCF in addition to the subchannel 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 a transition time of the downlink and the uplink, and a UGI for indicating a 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.

11) 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 71 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. The STA takes all the subchannels that have acquired the system parameters as available subchannels, and selects any one of them as a subchannel for the subsequent execution of the synchronization process and the random access procedure, and also determines the CAP to be accessed.

The acquiring system synchronization in the embodiment 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 CCH in the found physical frame; and using the parsing result from the found physics The BCF is detected in the frame to obtain system parameters.

Specifically, FIG. 8 is a flowchart of STA synchronization in an embodiment of the present invention. As can be seen from Figure 8, in the process of maintaining synchronization, the SICH timer and the BCF timer are set, and the STA continues to search for the 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 In the following application scenario: After the process of obtaining 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. 9 is a flowchart of a method for random access in an embodiment of the present invention, where the process includes:

Step 91: 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 FIG. 10 is specifically performed, where CAP_MAC refers to the lowest 7 bits of the MAC address of the CAP, which is the PN sequence index (0≤ < 4), and } is the cyclic shift parameter set, _ / is the index of the cyclic shift parameter ( 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.

Figure 11a to Figure 11c show the format of three uplink random access channels that can be selected in the embodiment of the present invention. Corresponding 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 11a 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 l ib is used, and 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 11c is used,

= 0 6Aus } ₀

Step 92: The CAP indicates the uplink transmission resource allocated according to the random access sequence.

The CAP uses the broadcast signaling to indicate the allocated uplink transmission resources, and Table 5 below shows an example of the bits in the broadcast signaling 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 STA identifies the broadcast type by using the value of ^b 2 ^b A to allocate resources for the random access request frame, and the STA uses the random access sequence index and random access. The sequence frequency domain cyclic shift index and the system frame number of the random access occurrence of the lowest 3 bits and three items are used to search for corresponding uplink transmission resources 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 Bit definition

b ₃ b ₂ b, b ₀ broadcast type

b^ ^b i ^b o =0100, random access request (allocation of resources for random access request frame) bAb ₅ b ₄ reserved

3⁄4, p _N sequence index, field value 0~3

AA. , p _N sequence frequency domain cyclic shift cable 1

000 cyclic shift 0, 001 cyclic shift 32, and so on 111 rotation shift 224 31 30 ' ' ' 3⁄4

⁶ „ ¹³ , the system frame number of random access occurs, the lowest 3 bits are allocated 1

5 4 ' ' -K, emission timing advance

A. "' ⁶ . The resource allocated by the random access request is indexed at the start position of the signaling/feedback channel. The value of the field ranges from 1 to 63. The value of 0 indicates invalid indication.

3 ₂ , p _N sequence index, o~3

6 ^{5 4} , p _N sequence frequency domain cyclic shift cable 1

bH 000 cyclic shift 0, 001 cyclic shift 32, and so on 111 rotation shift 224

3⁄4AA ⁷ , system frame number of random access occurs, minimum 3 bits allocation 2

3⁄4 ⁹ 3⁄4 ⁸ '"3⁄4., emission timing advance

B55 ^b 54 ---b ₅₀ , the resource allocated by the random access request is indexed at the starting position of the signaling/feedback channel, the field value ranges from 1 to 63, and the field value is 0 indicates invalid indication 71 70... 56 16 bits The CRC is added by the B STAID. If the STA does not receive the resource allocation information indicating the uplink transmission resource after the random access maximum frame interval is exceeded, the STA considers that the random access fails and needs to be re-established. A random access procedure is performed, 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 larger 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 93: 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 an example of the frame body carrying information of the random access request frame is given in Table 6 below. 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 91 is executed. At this time, the random access sequence is resent on the current subchannel, and the retransmission time is related to the random backoff introduced in the foregoing.

Step 94: 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 allocation 1 to the allocation 3 in Table 7 respectively correspond to one STA, and the allocation 1 is taken as an example. The STA identifies the broadcast type by ^3⁄433⁄42 ^° to allocate resources for the random access response frame, and the STA passes the random access sequence index and the random access sequence. The frequency domain cyclic shift index and the system frame number of the random access occurrence are at least 3 bits to determine the corresponding one. The downlink transmission resource of the 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 a downlink transport channel.

The random access response encapsulation in this embodiment is implemented in a random access response frame. Corresponding to the example of the random access request frame carrying information in Table 6, the following Table 8 gives an example of the frame body carrying information of the corresponding random access response frame. Table 8

Name length value

(bit)

Power adjustment 8 STA transmit power adjustment value,

The corresponding decimal number of this field is n, n=- 128~127 (the negative part is represented in complement form;): The transmit power is adjusted to w dBm.

Access status 2 0: Reserved

1 : Give up

2: Success

3: Re-access

Reserved 6 Default 0

MAC address of the STA's MAC 48 terminal

Address

TSTA ID 12 is used to identify the temporary ID of the user

Reserved 36, the default setting is 0. 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 during 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. 12 is a flowchart of a method for capability negotiation according to an embodiment of the present invention, where the process includes:

Step 121: 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 122: 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

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 0 is not supported

¹¹

MU-MIMO can 1 support

Force indication

Reserved, the default setting is 0

¹¹

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

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. With this parameter CAP, it can be known 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, and the 40MHz and 80MHz STAs may be scheduled in one or more. Independent transmission on the 20MHz subchannel, 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) An STBC capability indication indicating the space-time coding capability of the STA, by which the STA's STBC capability can be known. 11) 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 123: 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 operate on 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-only scheduling

1 : Reserved

MCS indication 1 indicates whether the STA supports 2.56-QAM

0 Not supported 256-QAM 1 Support 256-QAM

UEQM indication 1 0 does not support UEQM

1 Support UEQM

LDPC indicates the encoding method supported by 1 S TA:

0 LDPC code length 1 is not supported; 1 LDPC code length is 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 means that the number of 3⁄4 is 8

MU-MIMO 1 0: Not supported

1 : Support

Reserved 1 , the default setting is 0

Subcarrier grouping Ns 3 represents the number of subcarriers in the group: feedback capability 0: 1 (FPI=1) subcarriers are included in the group (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 symbol protection

1 : 4 OFDM symbol protection required

2~3: Reserved

STA UGI Requirement 2 0: Requires 2 OFDM symbol 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 can 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 adjust the maximum working bandwidth reported by the STA according to the actual channel load and the like. 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 actual conditions. 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, based on the MU-MIMO determination supported by the STA carried in the terminal basic capability negotiation request frame. 8) The sub-carrier packet Ns feedback capability is determined according to the sub-carrier packet Ns feedback capability carried in the terminal basic capability negotiation request frame, and the STA can perform feedback once every several sub-carriers, 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.

FIG. 13 is a schematic structural diagram of a terminal-side device accessing a wireless network according to the present invention. The device includes: a device 131 for acquiring system synchronization, a random access terminal-side device 132, and a capability negotiation terminal-side device 133.

The device 131 for acquiring system synchronization is used to perform a process of acquiring the system synchronization with the CAP.

The random access terminal side device 132 is configured to randomly access the CAP.

The capability negotiation terminal side device 133 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. 14 is a schematic structural diagram of an apparatus for acquiring system synchronization according to an embodiment of the present invention. The apparatus includes: a module 141 for acquiring synchronization, and the module 141 for acquiring synchronization includes: a first detecting unit 1411, a first parsing unit 1412, and a first The unit 1413 is acquired.

The first detecting unit 1411 is configured to search for a physical frame on the current subchannel.

The first parsing unit 1412 is configured to parse the SICH and the CCH in the physical frame that the first detecting unit 1411 finds, wherein the SICH indicates a structure of a physical frame, and the CCH indicates allocation of system resources. The first obtaining unit 1413 is configured to obtain system parameters from the physical frame found by the first detecting unit 1411 by using the result of the parsing by the first parsing unit 1412.

Further, after acquiring the system parameters, the first acquiring unit 1413 may trigger the first detecting unit 1411 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 1413 may use all subchannels of the acquired system parameters as available subchannels, and select any one of the subchannels therefrom.

As an alternative embodiment, the first detecting unit 1411 finds a physical frame by detecting the frame header of the physical frame on the current subchannel.

Further, when the first detecting unit 1411 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 1412 parses the SICH and the CCH is unsuccessful, the first detecting unit 1411 is triggered to continue to perform the operation until the waiting time of the subchannel is exceeded, triggering the first detecting unit 1411 to move to the next. A subchannel continues to look for physical frames.

As an optional embodiment, the first obtaining unit 1413 detects the broadcast information frame BCF from the physical frame, and acquires system parameters from the BCF.

Further, when the first acquiring unit 1413 does not detect the BCF, the first detecting unit 1411 is triggered to continue the operation until the waiting time of the subchannel is exceeded, and the first detecting unit 1411 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 142 for maintaining synchronization, and the module 142 for maintaining synchronization includes: a second detecting unit 1421, a second analyzing unit 1422, and a second obtaining unit 1423.

The second detecting unit 1421 is configured to continue to search for a physical frame on the selected subchannel.

The second parsing unit 1422 is configured to parse the SICH and the CCH in the physical frame sought by the second detecting unit 1421.

The second obtaining unit 1423 is configured to detect the BCF from the physical frame sought by the second detecting unit 1421 by using the parsing result of the second parsing unit 1422 to acquire the system parameter.

As a first alternative embodiment of the module 142 that maintains synchronization, the module 142 that maintains synchronization further includes: a SICH timer 1424, a BCF timer 1425, and a decision unit 1426.

The second detecting unit 1421 further starts the SICH timer 1424 and the BCF timer 1425 when starting to find the physical frame.

The determining unit 1426 is configured to determine whether the second parsing unit 1422 successfully parses the SICH before the SICH timer 1424 times out, and if so, resets the SICH timer 1424, otherwise the module 141 that triggers the acquisition synchronization re-executes the operation according to the channel list; Determining whether the second obtaining unit 1423 detects the BCF before the BCF timer 1425 times out, and if so, resetting the BCF timer 1425, and triggering the second detecting unit 1421 to continue searching for the physical frame on the selected subchannel, otherwise triggering acquisition The synchronized module 141 re-executes operations in accordance with the channel list.

As a second optional embodiment of the module 142 for maintaining synchronization, as shown in FIG. 14, the module 141 for maintaining synchronization further includes: a SICH timer 1424, a BCF timer 1425, and a determining unit 1426.

The determining unit 1426 is configured to determine whether the second parsing unit 1422 successfully parses the SICH before the SICH timer 1424 times out. If yes, reset the SICH timer 1424, otherwise the module 141 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 1423 detects the BCF before the BCF timer 1425 times out, if Yes, the BCF timer 1425 is reset, and the second detecting unit 1421 is triggered to continue to search for the physical frame on the selected subchannel. Otherwise, the module 141 for triggering the synchronization is selected as the starting point and according to the channel list. Re-execute the operation.

On the basis of this, the first obtaining unit 1413 further triggers the synchronization-maintaining module 142 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 optional embodiment of the module 142 for maintaining synchronization, as shown in FIG. 15, the module 142 for maintaining synchronization further includes: an SICH timer 1424, a BCF timer 1425, and a determining unit 1426.

The determining unit 1426 is configured to determine whether the second parsing unit 1422 successfully parses the SICH before the SICH timer 1424 times out, and if so, resets the SICH timer 1424, otherwise triggers the first acquiring unit 1413 to reselect one of the available subchannels. Determining whether the second obtaining unit 1423 detects the BCF before the BCF timer 1425 times out, and if so, resetting the BCF timer 1425, and triggering the second detecting unit 1421 to continue searching for the physical frame on the selected subchannel, otherwise triggering The first obtaining unit 1413 reselects one of the available subchannels.

In the foregoing three optional embodiments of the synchronization-based synchronization module 142, if the application scenario limitation of the channel list expiration is considered, the device for acquiring the system synchronization may further include a module for determining whether the channel list is expired, and the module may monitor the acquisition synchronization. The operation of the module 141 starts counting after it completes the channel list scan, and after reaching the set time, 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 142 that maintains synchronization can directly utilize the result of whether the channel list derived by the module has expired.

In the three alternative embodiments of the above-mentioned module 142 that maintains synchronization, the second detecting unit 1421 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. 14 and 15 can be integrated in the same module that is synchronized.

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 terminal side device for accessing the wireless network provided by the present invention is the random access terminal side device 132 shown in FIG. 13, and the present invention provides a total of two types of random access terminal side devices.

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. 16 is a schematic structural diagram of a first type of random access terminal side device according to an embodiment of the present invention, where the apparatus includes: a resource requesting unit 161, a random access requesting unit 162, and random access. The response receiving unit 163, the first trigger unit 164, the power control parameter reporting unit 165, the resource indication receiving unit 166, the second trigger unit 167, and the power control parameter adjusting unit 168.

The resource requesting unit 161 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 in the 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. Uplink transmission resources here The indication is carried in the system signaling, and uses an index of the random access sequence, an index of the frequency domain cyclic shift of the random access sequence, and a system frame number identifier of random access occurrence. Further, the indication of the uplink transmission resource further carries a transmission timing advance amount.

The random access requesting unit 162 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 162 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 163 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 164 is configured to monitor the random access response receiving unit 163 within the set number of frames after the random access requesting unit 162 sends the random access request, if the random access response receiving unit 163 does not receive the random In response to the access, the trigger resource request unit 161 transmits a random access sequence.

The power control parameter reporting unit 165 is configured to notify the power access control parameter reported by the random access request unit 162 for being carried in the random access request.

The resource indication receiving unit 166 is configured to receive, by the CAP, an indication of 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 167 is configured to compare the address carried in the random access response with the address of the belonging STA. If not, the trigger resource requesting unit 161 resends the random access sequence to the CAP.

The power control parameter adjustment unit 168 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. 16 , but may also include only some units shown in FIG. 16 according to different application requirements. Therefore, Fig. 16 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. 16, 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 a terminal basic capability negotiation request to the CAP by using the uplink transmission resource allocated by 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 a target subchannel to which the STA is to handover.

FIG. 17 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 171, a capability negotiation response receiving unit 172, a confirming unit 173, a first triggering unit 174, a second triggering unit 175, and The configuration parameter providing unit 176.

The capability negotiation requesting unit 171 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 172 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 173 is configured to send an acknowledgement to the CAP after the capability negotiation response receiving unit 172 correctly receives the terminal basic capability negotiation response.

The first triggering unit 174 is configured to: after the random access terminal side device completes the operation, the monitoring capability negotiation requesting unit 171, if the capability negotiation requesting unit 171 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 175 is configured to: after the capability negotiation requesting unit 171 sends the terminal basic capability negotiation request, the monitoring capability negotiation response receiving unit 172, if the capability negotiation response receiving unit 172 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 176 is configured to provide the maximum working bandwidth of the STA to the capability negotiation request unit 171 for sending in the terminal basic capability negotiation request. Further, the configuration parameter providing unit 176 is further configured to provide the subchannel information available to the STA to the capability negotiation request unit 171 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. 17 , but may also include only some of the units shown in FIG. 17 according to different application requirements, so FIG. 17 only gives An example of the structure of the capability negotiation terminal side device is not limited to its structure.

FIG. 18 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 181, a random access network side device 182, and a capability negotiation network side device 183.

The system parameter sending device 181 is configured to send system parameters.

The random access network side device 182 is configured to permit random access of the terminal side device.

The capability negotiation network side device 183 is configured to perform capability negotiation with the terminal side device.

The network side device for accessing the wireless network in the present invention is the random access network side device 182 shown in FIG. 18. The present invention provides two random access network side devices.

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. 19 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 191, a random access request receiving unit 192, and a random connection. The response unit 193, the deleting unit 194, the access state determining unit 195, the temporary identification assigning unit 196, and the power control parameter adjustment value determining unit 197.

The resource allocation unit 191 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 192 is configured to receive a random access request sent by using the uplink transmission resource.

The random access response unit 193 is configured to send a random access response to the STA.

The deleting unit 194 is configured to monitor the random access request receiving unit 192 within the set number of frames after the resource allocation unit 191 receives the random access sequence sent by the STA, if the random access request receiving unit 192 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 195 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 193, where it is carried in the random connection. Sent in the response.

The temporary identifier allocation unit 196 is configured to: when the access state determining unit 195 determines that the access status indication is successful, allocate a temporary identifier to the STA in its own range, and send the temporary identifier to the random access response unit 193 for The bearer is sent in the random access response.

The power control parameter adjustment value determining unit 197 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 192, and send the power control parameter adjustment value to The random access response unit 193 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. 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 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.

The random access response unit is configured to send a random access response to 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. 19, and the functions of each unit are similar.

The capability negotiation network side device in the present invention includes: 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 that is 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.

20 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 201, a capability negotiation response unit 202, an acknowledgment receiving unit 203, a monitoring unit 204, a resource allocation unit 205, and a working device. The channel mapping information determining unit 206, the spectrum aggregation mode information providing unit 207, and the formal identification assigning unit 208.

The capability negotiation request receiving unit 201 receives the terminal basic capability negotiation request sent by the STA by using the allocated uplink transmission resource.

The capability negotiation response unit 202 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.

The acknowledgment receiving unit 203 is configured to receive an acknowledgment sent by the STA after correctly receiving the basic capability negotiation response of the terminal.

The monitoring unit 204 is configured to monitor the acknowledgment receiving unit 203 in the set number of frames after the capability negotiation response unit 202 sends the terminal basic capability negotiation response, and notify the capability negotiation request receiving unit 201 if the acknowledgment receiving unit 203 does not receive the acknowledgment. The capability negotiation response unit 202 ends this operation. Further, before being triggered by the monitoring unit 204, the capability negotiation response unit 202 may resend the terminal basic capability negotiation response to the STA.

The resource allocation unit 205 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 206 is configured to determine working subchannel mapping information, and send the working subchannel mapping information to the capability negotiation response unit 202 for carrying 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 206 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. Based on this, further, the working subchannel mapping information determining unit 206 determines, in the target subchannel indicated by the working subchannel mapping information, one or more available subchannels of the STA.

The spectrum aggregation mode information providing unit 207 is configured to provide the frequency negotiation mode information indicating the relationship between the target subchannels to the capability negotiation response unit 202 for being carried in the terminal basic capability negotiation response.

The official identity assigning unit 208, the STA for sending the basic capability negotiation request of the transmitting terminal allocates an official identifier in its own range, and sends the formal identifier to the capability negotiation response unit 202 for carrying the basic capability negotiation response of the terminal. Sent in. The official identification assigning unit 208 can obtain the information of the STA that is currently requested for capability negotiation from the capability negotiation request receiving unit 201, 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. 20, but may also include only some of the units shown in FIG. 20 according to application requirements, so FIG. 20 only gives An example of the structure of the capability negotiation network side device is not limited to its structure.

The present invention also provides several methods of creating a network.

FIG. 21 is a flowchart of a first method for creating a network according to the present invention, where the process includes: Step 211: Select a channel.

Step 212: Detect wireless signal energy on the channel during a detection period. Step 213: If the time of the energy of the wireless signal on the channel is less than or equal to the threshold value, if the time is greater than or equal to the set time length, determine that the channel is a channel that can be used to create a network; wherein, the set time The length is less than or equal to the detection period.

FIG. 22 is a flowchart of a second method for creating a network according to the present invention, where the process includes: Step 221: Select a channel.

Step 222: Detect wireless signal energy on the channel during a detection period.

Step 223: If the average value of the energy of the wireless signal on the channel is less than or equal to the threshold, the channel is determined to be a channel that can be used to create a network, where the set is The length of time is less than or equal to the detection period.

FIG. 23 is a flowchart of a third method for creating a network in the present invention, where the process includes: Step 231: Detecting energy of a wireless signal on each of a plurality of channels.

Step 232: Determine a channel whose wireless signal energy is less than or equal to the threshold as an available channel. Step 233: Create a network on at least one available channel.

As an alternative embodiment, the energy of the wireless signal on each of the plurality of channels is detected one by one.

As an alternative embodiment, the energy of the wireless signal on the channel is detected for each channel during a set detection period.

As an optional embodiment, the determining that the wireless signal energy is less than or equal to the threshold is: the time that the energy of the wireless signal on the channel is less than or equal to the threshold is greater than or equal to the set time length.

As an optional embodiment, the determining that the wireless signal energy is less than or equal to the threshold is: the average value of the energy of the wireless signal on the channel is less than or equal to the threshold for a set length of time.

24 is a flowchart of a fourth method for creating a network according to the present invention. The process includes: Step 241: Determine a channel list to be detected.

Step 242: Select an undetected channel from the channel list in order.

Step 243: Detect wireless signal energy on the selected channel and start a detection cycle timer. Step 244: If the detected signal energy is lower than the preset threshold during the detection period, add the channel to the available channel list, and continue to detect other undetected channels until all channels in the channel list are detected. ;

During the detection period, if the detected signal energy exceeds the preset threshold, the other channels that have not been detected are continuously scanned until all the channels in the channel list are detected.

Step 245: After all channels in the channel list are all detected, if there is an available channel in the available channel list, the network creation process is started; otherwise, the detection is restarted after a delay.

FIG. 25 is a flowchart of a method for creating a network according to an embodiment of the present invention, where the process includes: Step 251: Determine a channel list to be detected.

Step 252: Determine whether all channels in the channel list are detected. If yes, go to step 253, otherwise go to step 254.

Step 253: Determine whether the available channel list is empty. If yes, perform step 251 after the delay, otherwise start the network creation process.

Step 254: Select an undetected channel number from the channel list.

Step 255: On the selected channel, detect the signal energy and start the timer T.

Step 256: Determine whether the channel energy exceeds the threshold within the timer ,, and if yes, execute step 252, otherwise the selected channel is added to the available channel list, and then step 252 is performed.

26 is a flow chart of a first method for accessing a wireless network according to the present invention, the method comprising: Step 261: Generate a random access request, where the random access request carries a power control parameter. Step 262: Send the random access request.

FIG. 27 is a flowchart of a second method for accessing a wireless network according to the present invention. The method includes: Step 271: Generate a random access response, where the random access response carries a power control parameter adjustment value;

Step 272: Send the random access response.

FIG. 28 is a flowchart of a third method for accessing a wireless network according to the present invention. The method includes: Step 281: Generate a random access response, where the random access response carries an STA that receives a random access response. a temporary identifier allocated in its own range, the temporary identifier being used to identify the STA before the access to the wireless network succeeds;

Step 282: Send the random access response.

FIG. 29 is a flowchart of a fourth method for accessing a wireless network according to the present invention. The method includes: Step 291: Generate a random access response, where the random access response carries an access state, and the access state Indicating an access situation of a STA that receives a random access response;

Step 292: Send the random access response.

Corresponding to the four methods for accessing a wireless network shown in FIG. 26 to FIG. 29, 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 purpose of describing the above-described embodiments, but one of ordinary skill in the art will recognize that the various embodiments can be further combined and arranged. Therefore, the embodiments described herein are intended to cover all such modifications, modifications and variations as fall within the scope of the appended claims. Furthermore, the term "comprising", as used in the specification or claims, is intended to be inclusive of the term "comprising" as used in the claims. Moreover, 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 a random access sequence to a central access point CAP on any one of the subchannels;

Receiving a random access response sent by the CAP.

A method for accessing a wireless network, the method comprising: sending a random access request carrying a power control parameter to a CAP;

Receiving a random access response sent by the CAP.

3. The method of claim 2, further comprising:

The method according to claim 1 or 3, further comprising: waiting for a set number of frames after transmitting the random access sequence, and if not receiving the indication of the uplink transmission resource by the CAP, re-directing The CAP sends a random access sequence.

The method according to claim 4, wherein the indication of the uplink transmission resource is carried in system signaling, and the frequency domain is cyclically shifted by using an index of the random access sequence and the random access sequence. The index of the bit and the system frame number identifier of the random access.

The method according to claim 4, wherein the indication of the uplink transmission resource further carries a transmission timing advance amount;

When the random access request is sent, the timing advance is performed according to the transmission timing advance amount.

The method according to claim 1 or 3, further comprising: waiting for a set number of frames after transmitting the random access request, and if the random access response is not received, resending the random CAP to the CAP Access sequence.

The method according to claim 1 or 3, wherein the receiving, by the CAP, an indication of a downlink transmission resource that sends the random access response.

The method according to claim 8, wherein the indication of the downlink transmission resource is carried in system signaling, and the frequency domain cyclic shift of the random access sequence is performed by using an index of the random access sequence The index of the bit and the system frame number identifier of the random access.

The method according to claim 1 or 3, wherein the random access response carries an address;

The method according to claim 1 or 2, wherein the random access response carries an access status indicating success or abandonment.

The method according to claim 11, wherein when the access status indication is successful, the random access response further carries a temporary identifier allocated in the CAP range.

The method according to claim 1 or 2, wherein the random access response carries a power control parameter adjustment value;

The power control parameter adjustment value is determined according to a power control parameter carried in the random access request.

A method for accessing a wireless network, the method comprising: receiving a random access sequence sent by a STA on any one of the subchannels; Allocating an uplink transmission resource according to the random access sequence;

Sending a random access response to the STA.

A method for accessing a wireless network, the method comprising: receiving a random access request that carries a power control parameter sent by a STA;

Sending a random access response to the STA.

16. The method of claim 15, further comprising:

17. The method of claim 14 or 16, further comprising: transmitting an indication of the uplink transmission resource.

The method according to claim 17, wherein the indication of the uplink transmission resource is carried in system signaling, and an index of the random access sequence, a frequency domain of the random access sequence, The index of the cyclic shift and the system frame number identifier of the random access.

The method according to claim 17, wherein the indication of the uplink transmission resource further carries a transmission timing advance amount indicating a timing advance amount at the time of uplink transmission.

The method according to claim 14 or 16, further comprising: waiting for a set number of frames after receiving the random access sequence, deleting the STA if the random access request is not received Corresponding all the information, or deleting the information corresponding to the random access sequence.

The method according to claim 14 or 16, further comprising: allocating a downlink transmission resource for the random access response, and transmitting the indication of the downlink transmission resource.

The method according to claim 21, wherein the indication of the downlink transmission resource is carried in system signaling, and the frequency domain cyclic shift of the random access sequence is performed by using an index of the random access sequence. The index of the system and the number of the system frame number at which random access occurs.

The method according to claim 14 or 15, further comprising: determining, according to the measurement result of the uplink signal, that the access status of the STA is successful or abandoned, and carrying in the random access response .

The method according to claim 23, wherein, when determining that the access status is successful, the method further includes: assigning, to the STA, a temporary identifier in the range of the STA, to identify the location before accessing the wireless network. Said STA.

The method according to claim 14 or 15, further comprising: determining a power control parameter adjustment value according to the power control parameter carried in the random access request, and carrying the random access response in.

A terminal device for accessing a wireless network, the device comprising: a resource requesting unit, configured to send a random access sequence to a CAP on any one of the subchannels; and a random access request unit, configured to: Using the CAP to send a random access request to the CAP according to the uplink transmission resource allocated by the random access sequence;

And a random access response receiving unit, configured to receive a random access response sent by the CAP.

The device according to claim 26, further comprising: a power control parameter reporting unit, configured to notify the random access request unit of the power control parameter to be reported, for carrying the random access Sent in the request.

A terminal device for accessing a wireless network, the device comprising: a random access requesting unit, configured to send a random access request carrying a power control parameter to the CAP;

The device according to claim 28, further comprising: 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 of the random access request Transfer resources.

The device according to claim 26 or 29, wherein the resource requesting unit is further configured to receive, by the CAP, the uplink transmission resource in a set number of frames after sending a random access sequence. Instructing to resend the random access sequence if the indication of the uplink transmission resource is not received.

The device according to claim 30, wherein the indication of the uplink transmission resource is carried in system signaling, and an index of the random access sequence, a frequency domain of the random access sequence, The index of the cyclic shift and the system frame number identifier of the random access.

The device according to claim 30, wherein the indication of the uplink transmission resource further carries a transmission timing advance amount;

The device according to claim 26 or 29, further comprising: a first triggering unit, configured to monitor within a set number of frames after the random access requesting unit sends a random access request The random access response receiving unit, if the random access response receiving unit does not receive the random access response, triggers the resource request unit to resend the random access sequence.

The device according to claim 26 or 29, further comprising: a resource indication receiving unit, configured to receive an indication that the CAP sends a downlink transmission resource that sends the random access response.

The device according to claim 34, wherein the indication of the downlink transmission resource is carried in system signaling, and the frequency domain cyclic shift of the random access sequence is performed by using an index of the random access sequence The index of the bit and the system frame number identifier of the random access.

The device according to claim 26 or 29, wherein the random access response carries an address;

The device according to claim 26 or 28, wherein the random access response carries an access status indicating success or abandonment.

The apparatus according to claim 37, wherein, when the access status indication is successful, the random access response further carries a temporary identifier allocated by the belonging STA in the CAP range;

The device according to claim 27 or 28, wherein the random access response further carries a power control parameter adjustment value;

The device according to claim 39, wherein the power control parameter comprises: a current transmit power and a power adjustment margin of the associated STA;

The power control adjustment value includes: an adjustment value of a transmit power of the STA.

A network side device for accessing a wireless network, the device comprising: a resource allocation unit, configured to receive a random access sequence sent by a STA on any one of the subchannels, and according to the random access Allocating uplink transmission resources into the sequence; a random access request receiving unit, configured to receive a random access request sent by the STA by using the uplink transmission resource;

42. A network side device for accessing a wireless network, the device comprising: a random access request receiving unit, configured to receive a random access request that carries a power control parameter sent by a STA;

The device according to claim 42, wherein the device further comprises: a resource allocation unit, configured to receive a random access sequence sent by the STA on any one of the subchannels, and according to the random access The sequence allocates an uplink transmission resource that sends the random access request.

The device according to claim 41 or 43, wherein the resource allocation unit is further configured to send an indication of the uplink transmission resource.

The device according to claim 44, wherein the indication of the uplink transmission resource is carried in system signaling, and the frequency domain is cyclically shifted by using an index of the random sequence and the random access sequence. The index of the bit and the system frame number identifier of the random access.

The device according to claim 44, wherein the indication of the uplink transmission resource further carries a transmission timing advance amount, indicating a timing advance amount at the time of uplink transmission.

The device according to claim 41 or 43, wherein the device further comprises: a deleting unit, configured to set a frame number after the resource allocation unit receives the random access sequence sent by the STA Monitoring the random access request receiving unit, if the random access request receiving unit does not receive the random access request sent by the STA, deleting all information corresponding to the STA, or deleting the random access sequence Corresponding information.

The device according to claim 41 or 43, wherein the resource allocation unit is further configured to allocate a downlink transmission resource for the random access response, and send the indication of the downlink transmission resource.

The device according to claim 48, wherein the indication of the downlink transmission resource is carried in system signaling, and the frequency domain cyclic shift of the random access sequence is performed by using an index of the random access sequence. The index of the system and the number of the system frame number at which random access occurs.

The device according to claim 41 or 42, wherein the device further comprises: an access state determining unit, configured to determine, according to the measurement result of the uplink signal, that the access status of the STA is successful or abandoned, And transmitting the access status to the random access response unit, where the bearer is sent in a random access response.

The device according to claim 50, wherein the device further comprises: temporarily identifying the temporary identifier assigning unit, configured to: when the access state determining unit determines that the access state is successful, The STA allocates a temporary identifier in its own range, and sends the temporary identifier to the random access response unit, where the bearer is sent in a random access response; the temporary identifier is used to identify the identifier before accessing the wireless network. Said STA.

The device according to claim 41 or 42, wherein the device further comprises: a power control parameter adjustment value determining unit, configured to use the power carried in the random access request received by the random access request receiving unit And controlling the parameter, determining the power control parameter adjustment value, and sending the power control parameter adjustment value to the random access response unit, where the carrier is carried in the random access response.

The device according to claim 52, wherein the power control parameter comprises: a current transmit power and a transmit power adjustment margin of the STA;