WO2012130025A1 - Procédé et dispositif pour accéder à un réseau sans fil - Google Patents

Procédé et dispositif pour accéder à un réseau sans fil Download PDF

Info

Publication number
WO2012130025A1
WO2012130025A1 PCT/CN2012/072045 CN2012072045W WO2012130025A1 WO 2012130025 A1 WO2012130025 A1 WO 2012130025A1 CN 2012072045 W CN2012072045 W CN 2012072045W WO 2012130025 A1 WO2012130025 A1 WO 2012130025A1
Authority
WO
WIPO (PCT)
Prior art keywords
sta
capability negotiation
unit
terminal
random access
Prior art date
Application number
PCT/CN2012/072045
Other languages
English (en)
Chinese (zh)
Inventor
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 (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 北京新岸线无线技术有限公司 filed Critical 北京新岸线无线技术有限公司
Priority to CN201280012672.3A priority Critical patent/CN103609189B/zh
Publication of WO2012130025A1 publication Critical patent/WO2012130025A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access

Definitions

  • 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
  • wireless communication systems have developed rapidly, such as 802.11-based wireless LAN technology WiFi, 802.15-based Bluetooth systems, and Femto technology for indoor applications generated by mobile communication systems. A wide range of applications.
  • 802.11-based WiFi technology is one of the most widely used wireless network transmission technologies. Since the WiFi system uses the Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) mechanism, the system efficiency is much higher than that of the wireless resources. The root cause of this problem is that the CSMA/CA mechanism is a contention-based random multiple access mechanism, between a central access point (CAP, Access Point) and a station (STA, Station), or different STAs. In the meantime, the right to use wireless resources will be competed through the CSMA/CA mechanism, and at the same time, the wireless channel will be competed, and collision will occur at this time, resulting in waste of wireless resources.
  • CAP central access point
  • STA station
  • the CSMA/CA mechanism requires that the CAP or STA need to randomly retreat when competing for the wireless channel.
  • the wireless channel is idle but not used, which is also the pole of the wireless channel.
  • 802.11 systems are less efficient.
  • 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.
  • the 802.11 system is flexible and does not rely on centralized control mechanisms, so it can achieve lower equipment costs.
  • the Femto technology based on the 3GPP standard is a new technology for indoor coverage that has evolved from a mobile communication system. Based on the statistics of 3G systems, about 70% of data services occur indoors, so indoor high-speed data access solutions are especially important.
  • Femto base station called pico Base station, small size and flexible deployment. Due to the evolution from mobile communication systems, Femto base stations have inherited almost all the characteristics of mobile communication systems. The Femto device only combines its limited coverage, fewer access users and other application scenarios, and reduces the processing power of the device, thereby reducing the cost of the device.
  • 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.
  • the TDD duplex mode of the mobile communication system including the Femto system
  • the static allocation of uplink and downlink resources, and the various types of data services with different demands, such as browsing web pages, mobile video, mobile games, etc. are difficult to realize business requirements and resources. Dynamic adaptation of the partition. Compared with Wi-Fi, since Femto uses a centralized control mechanism based on scheduling, there is no waste of radio resources between the base station or CAP and the terminal or terminal due to collision and random backoff, so the link efficiency is high.
  • 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.
  • a method for accessing a wireless network comprising:
  • the CAP And receiving, by the CAP, a basic capability negotiation response of the terminal that carries the working subchannel mapping information, where the working subchannel mapping information indicates the target subchannel to which the STA is to be handed over.
  • the method further includes: after correctly receiving the terminal basic capability negotiation response, sending an acknowledgement to the CAP.
  • the method further includes: receiving an allocation indication of the uplink transmission resource.
  • the method further includes: waiting for the set number of frames after the random access procedure performed before the sending the basic capability negotiation request is completed, and re-executing the random access process if the allocation indication is not received.
  • the method further includes: waiting for the set number of frames after the basic capability negotiation request of the terminal is sent, and if the basic capability negotiation response of the terminal is not received, re-executing the random access procedure before sending the basic capability negotiation request of the terminal.
  • the terminal basic capability negotiation response further carries spectrum aggregation mode information and/or an official identifier
  • the spectrum aggregation mode information indicates a relationship between the plurality of target subchannels; the formal identifier is an official identifier of the STA within the CAP range.
  • the terminal basic capability negotiation request carries the maximum working bandwidth of the STA.
  • the terminal basic capability negotiation request further carries the subchannel information that is available to the STA.
  • a method for accessing a wireless network comprising:
  • the method further includes: receiving an acknowledgement sent by the STA after correctly receiving the basic capability negotiation response of the terminal.
  • the method further includes: waiting for the set number of frames after sending the basic capability negotiation response of the terminal, and ending the process if the confirmation is not received.
  • the terminal basic capability negotiation response is resent to the STA within the set number of frames.
  • the method further includes: allocating the uplink transmission resource, and sending an indication of the uplink transmission resource to the STA.
  • the terminal basic capability negotiation response further carries spectrum aggregation mode information and/or an official identifier
  • the official identifier is an official identifier assigned by the STA within its own scope.
  • the terminal basic capability negotiation request carries a maximum working bandwidth of the STA
  • the method further includes: determining the working subchannel mapping information
  • a sum of bandwidths of the target subchannels indicated by the working subchannel mapping information is less than or equal to a maximum working bandwidth of the STA.
  • the method further includes: adjusting a maximum working bandwidth of the STA;
  • the sum of the bandwidths of the target subchannels indicated by the working subchannel mapping information is less than or equal to the adjusted maximum working bandwidth of the STA.
  • the terminal basic capability negotiation request further carries the subchannel information that is available to the STA;
  • the target subchannel indicated by the working subchannel mapping information includes one or more available subchannels of the STA.
  • the working subchannel mapping information indicates one or more target subchannels using a bitmap.
  • a terminal side device for accessing a wireless network comprising:
  • a capability negotiation requesting unit configured to send, by using an uplink transmission resource allocated by the CAP, a terminal basic capability negotiation request to the CAP;
  • the capability negotiation response receiving unit is configured to receive a terminal basic capability negotiation response that is sent by the CAP and carries the working subchannel mapping information, where the working subchannel mapping information indicates the target subchannel to be switched by the STA.
  • the apparatus further includes: an acknowledgment unit, configured to send an acknowledgment to the CAP after the capability negotiation response receiving unit correctly receives the terminal basic capability negotiation response.
  • the capability negotiation requesting unit further receives an allocation indication of the uplink transmission resource.
  • the device further includes: a first triggering unit, configured to monitor the capability negotiation requesting unit within a set number of frames after the random access terminal side device completes the operation, if the capability negotiation requesting unit does not receive The allocation indication triggers the random access terminal side device to perform the operation again.
  • a first triggering unit configured to monitor the capability negotiation requesting unit within a set number of frames after the random access terminal side device completes the operation, if the capability negotiation requesting unit does not receive The allocation indication triggers the random access terminal side device to perform the operation again.
  • the apparatus further includes: a second triggering unit, configured to monitor the capability negotiation ring within a set number of frames after the capability negotiation requesting unit sends the terminal basic capability negotiation request The receiving unit, if the capability negotiation response receiving unit does not receive the terminal basic capability negotiation response, triggers the random access terminal side device to perform the operation again.
  • a second triggering unit configured to monitor the capability negotiation ring within a set number of frames after the capability negotiation requesting unit sends the terminal basic capability negotiation request The receiving unit, if the capability negotiation response receiving unit does not receive the terminal basic capability negotiation response, triggers the random access terminal side device to perform the operation again.
  • the terminal basic capability negotiation response further carries spectrum aggregation mode information and/or an official identifier
  • the spectrum aggregation mode information is used to indicate a relationship between a plurality of the target subchannels; the formal identifier is an official identifier allocated by the STA in the CAP range.
  • the apparatus further includes:
  • a configuration parameter providing unit configured to provide the maximum working bandwidth of the STA to the capability negotiation requesting unit for sending in a terminal basic capability negotiation request.
  • the configuration parameter providing unit is further configured to provide the sub-channel information available to the STA to the capability negotiation requesting unit, where it is sent in a terminal basic capability negotiation request.
  • a network side device for accessing a wireless network comprising:
  • the capability negotiation request receiving unit receives the terminal basic capability negotiation request sent by the STA by using the allocated uplink transmission resource;
  • the capability negotiation response unit sends a basic capability negotiation response carrying the working subchannel mapping information to the STA, where the working subchannel mapping information indicates the target subchannel to which the STA is to be handed over.
  • the apparatus further includes: an acknowledgment receiving unit, configured to receive an acknowledgment sent by the STA after correctly receiving the basic capability negotiation response of the terminal.
  • the device further includes: a monitoring unit, configured to monitor the acknowledgement receiving unit within a set number of frames after the capability negotiation response unit sends the terminal basic capability negotiation response, if the acknowledge receiving unit does not Upon receiving the acknowledgement, the capability negotiation request unit and the capability negotiation response unit are triggered to end the current operation.
  • a monitoring unit configured to monitor the acknowledgement receiving unit within a set number of frames after the capability negotiation response unit sends the terminal basic capability negotiation response, if the acknowledge receiving unit does not Upon receiving the acknowledgement, the capability negotiation request unit and the capability negotiation response unit are triggered to end the current operation.
  • the capability negotiation response unit resends the terminal basic capability negotiation response to the STA before being triggered by the monitoring unit.
  • the apparatus further includes: a resource allocation unit, configured to allocate, to the STA, an uplink transmission resource that sends a terminal basic capability negotiation request, and send an allocation indication of the uplink transmission resource.
  • a resource allocation unit configured to allocate, to the STA, an uplink transmission resource that sends a terminal basic capability negotiation request, and send an allocation indication of the uplink transmission resource.
  • the apparatus further includes: a spectrum aggregation mode information providing unit and/or a formal identification allocation unit;
  • the spectrum aggregation mode information providing unit is configured to provide spectrum aggregation mode information indicating a relationship between the plurality of target subchannels to the capability negotiation response unit, where the information is carried in a terminal basic capability negotiation response;
  • the official identity allocation unit is configured to allocate a formal identity to the STA in its own range, and send the formal identity to the capability negotiation response unit, where the carrier is sent in the terminal basic capability negotiation response.
  • the apparatus further includes: a working subchannel mapping information determining unit, configured to determine the working subchannel mapping information, and send the working subchannel mapping information to the capability negotiation response unit, where It is carried in the terminal basic capability negotiation response;
  • a sum of bandwidths of the target subchannels indicated by the working subchannel mapping information is less than or equal to a maximum working bandwidth of the STA.
  • the working subchannel mapping information determining unit further adjusts a maximum working bandwidth of the STA carried in the basic capability negotiation request of the terminal;
  • the sum of the bandwidths of the target subchannels indicated by the working subchannel mapping information is less than or equal to the adjusted maximum working bandwidth of the STA.
  • the target subchannel indicated by the working subchannel mapping information includes one or more available subchannels of the STA.
  • the working subchannel mapping information indicates one or more target subchannels using a bitmap.
  • the present invention when the capability negotiation is performed, the present invention also indicates the target subchannel to which the STA is to be handed over, that is, enables the STA to perform channel switching while the capability negotiation is performed, and balances the operation on each subchannel on the basis of the saving operation flow. load.
  • FIG. 1 is a flow chart of a method for accessing a wireless network in the present invention
  • Figure 3 is a reference model of the EUHT system
  • Figure 4 shows the composition of the access system of the EUHT system
  • FIG. 5 is a schematic diagram of a process of transmitting and receiving protocol data between a STA and a CAP;
  • FIG. 6 is a flowchart of a method for acquiring system synchronization in an embodiment of the present invention
  • FIG. 7 is a road diagram of a method for maintaining synchronization in an embodiment of the present invention.
  • FIG. 9 is a schematic diagram of transmitting a random access sequence in an embodiment of the present invention.
  • 10a 10c are formats of an uplink random access channel according to an embodiment of the present invention.
  • FIG. 11 is a flowchart of a method for capability negotiation according to an embodiment of the present invention.
  • FIG. 12 is a schematic structural diagram of a terminal side device accessing a wireless network according to the present invention.
  • FIG. 13 is a schematic structural diagram of an apparatus for acquiring system synchronization according to an embodiment of the present invention
  • FIG. 14 is another schematic structural diagram of an apparatus for acquiring system synchronization according to an embodiment of the present invention
  • FIG. 16 is a schematic structural diagram of a capability negotiation terminal side device according to an embodiment of the present invention
  • FIG. 17 is a schematic structural diagram of a network side device accessing a wireless network according to the present invention.
  • FIG. 18 is a schematic structural diagram of a first random access wireless network side device according to an embodiment of the present invention
  • FIG. 19 is a schematic structural diagram of a capability negotiation network side device according to an embodiment of the present invention
  • 21 is a flowchart of another method for accessing a wireless network in the present invention.
  • FIG. 22 is still another method for accessing a wireless network in the present invention. detailed description
  • FIG. 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 is equivalent to the process of system initialization.
  • Step 12 Randomly access the CAP and perform capability negotiation with the CAP.
  • 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.
  • the wireless network can be accessed in the wireless communication system.
  • the method for accessing a wireless network provided by the present invention refers to a specific implementation method of a capability negotiation process in the process of accessing a wireless network.
  • FIG. 2 is a flowchart of a method for capability negotiation in the present invention, where the process includes:
  • Step 21 Send the terminal basic capability negotiation request to the CAP by using the uplink transmission resource allocated by the CAP.
  • Step 22 Receive a basic capability negotiation response of the terminal that carries the working subchannel mapping information sent by the CAP, where the working subchannel mapping information indicates a target subchannel to be switched by the STA.
  • the capability negotiation method provided by the present invention when performing capability negotiation, also indicates the target subchannel to which the STA is to be handed over, that is, enables the STA to perform channel switching while the capability negotiation is performed, and balances the children on the basis of the saving operation flow.
  • the load on the channel when performing capability negotiation, also indicates the target subchannel to which the STA is to be handed over, that is, enables the STA to perform channel switching while the capability negotiation is performed, and balances the children on the basis of the saving operation flow. The load on the channel.
  • EUHT enhanced ultra-high speed wireless local area network
  • MU-MIMO multi-user multiple input multiple output
  • EUHT also uses a centralized scheduling mechanism to avoid collisions and backoffs of air interfaces and to provide differentiated services for different services.
  • the EUHT system can provide at least 1.2 Gbps of throughput to meet current user requirements for wireless network data transmission rates.
  • Figure 3 shows the reference model for the EUHT system.
  • the system reference model shown in Figure 3 mainly refers to the air interface reference model, including: Media Access Control (MAC) layer and physical (PHY) layer.
  • MAC Media Access Control
  • PHY physical
  • the MAC layer includes an adaptation sublayer and a MAC sublayer.
  • MSDU refers to information delivered as a unit between MAC Service Access Points (SAP).
  • SAP MAC Service Access Points
  • 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.
  • MPDU refers to the data unit exchanged between two peer MAC entities using PHY layer services.
  • FIG. 4 shows the access system of the EUHT system, including the central access point (CAP) and the station (STA), where the STA can be used for various data devices, such as: PDA, notebook, camera, camera, mobile phone, tablet Computer, pad, etc.
  • STA1 and STA2 access the CAP through an air interface protocol, and the CAP establishes communication with an existing external network (such as IP bone network, Ethernet) through wired or wireless.
  • the protocol composition of the CAP includes a MAC layer and a PHY layer.
  • the STA protocol consists of an Application layer, a Transmission Control (TCP) layer, a Network (IP) layer, a MAC layer, and a PHY layer. Based on the protocol composition shown in FIG. 4, FIG.
  • 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.
  • 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.
  • SICH system information channel
  • CCH control channel
  • 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.
  • the acquisition system synchronization is implemented for the dynamic configuration of the physical frame structure.
  • 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.
  • FIG. 6 is a flowchart of a method for accessing a wireless network according to an embodiment of the present invention, where the method includes the process of acquiring synchronization, where the process of acquiring synchronization includes:
  • Step 61 Find a physical frame on the current subchannel, specifically, determine whether a frame header of the physical frame is detected on the current subchannel, and if yes, perform step 62, otherwise continue to perform detection until the waiting time of the subchannel is exceeded. , move to the next subchannel and proceed to step 61.
  • Step 62 Determine whether the SICH and CCH in the physical frame can be parsed. If yes, go to step 63. Otherwise, continue to step 61. When the waiting time of the subchannel is exceeded, transfer to the next subchannel to continue to step 61.
  • the positions of the preamble sequence and the SICH are preset in advance and are not dynamically configured.
  • the CCH is located adjacent to the SICH, and the duration of the CCH can be dynamically configured.
  • the SICH indicates the structural configuration of the physical frame, and specifically indicates the presence and/or duration of each channel in the current physical frame. For example, for some channels with fixed duration, the SICH can use 1 bit to indicate the presence or absence of the channel, which implicitly indicates the duration of the channel. For some channels with irregular duration, multiple bits can be used in the SICH to indicate CCH. For example, 6 bits can be used in the SICH, and a maximum of 63 OFDM symbols can be indicated. One OFDM symbol is a minimum resource allocation unit, for example, the 6 bits are 010000, and the converted decimal number is 16, that is, corresponding to 16 OFDM symbols.
  • the broadcast scheduling signaling is detected from the CCH in the physical frame to detect the resource allocated for the BCF.
  • An example of broadcast scheduling signaling is given in Table 3 below.
  • the BCF is transmitted in the signaling/feedback channel shown in Table 3, and the signaling/feedback channel is included in the transport channel.
  • Determined downlink signaling / feedback channel resources 0000 indicates when to take, if set to 0 it is determined that there is a frame BCF, 65--2 position indication resources, ⁇ , ⁇ indicating the length of the resource.
  • Step 63 Determine whether a broadcast information frame (BCF) is detected. If yes, implement downlink synchronization. Otherwise, return to step 61 until the subchannel is exceeded. At the time, the process proceeds to the next subchannel and proceeds to step 61.
  • BCF broadcast information frame
  • 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.
  • 0 means 1 antenna
  • the antenna 2 at the CAP end represents 3 antennas
  • Configuration 3 means 4 antennas
  • the BCF interval 16 indicates the time period in which the BCF frame appears, in ms. Random access backoff 4 is used for random access backoff window control.
  • the minimum window value of the minimum window is 0 ⁇ 2 n - l
  • Scheduling request backoff 4 Minimum window system for the control of the backoff window based on the resource request of the competition, the minimum window value range 0 ⁇ 2 n - 1
  • Random access backoff 8 is used for random access backoff window control.
  • the maximum window value of the maximum window is 0 ⁇ 2 n - l
  • Scheduling request backoff 8 Maximum window system for the control of the backoff window based on the resource request of the competition, the maximum window value range is 0 ⁇ 2 n - l
  • This field corresponds to the signed decimal number n.
  • n - 128- 127 (The negative part is represented in complement form):
  • the CAP transmit power is n dBm.
  • the guard interval is 2 OFDM symbol periods
  • guard interval is 4 OFDM symbol periods; 2 ⁇ 3: reserved
  • the guard interval is 2 OFDM symbol periods
  • guard interval is 4 OFDM symbol periods (processing delay);
  • the STA may determine other working subchannels of the CAP that broadcast the BCF in addition to the subchannels currently detecting the BCF.
  • Network alias indicating the network name, so that the STA can select the network to join.
  • 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.
  • the STA 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.
  • 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.
  • 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.
  • a DGI for indicating the transition time of the downlink and the uplink
  • a UGI for indicating the transition time of the uplink and the downlink
  • a location of a downlink sounding channel for indicating a starting position of the downlink sounding channel in the downlink transport channel
  • 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.
  • An uplink random access channel (UL-RACH) format for indicating a random access format.
  • U-RACH uplink random access channel
  • 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.
  • 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.
  • the STA After the STA acquires the system parameters on a certain subchannel, it will transfer to the next subchannel to continue to perform step 61 until a scan is performed on all the subchannels in the channel list to complete the process of acquiring synchronization.
  • the STA may acquire system parameters on one or more subchannels, which may be working subchannels of the same CAP, and may also include different The working subchannel of the CAP. STA will have obtained system parameters All subchannels are available as subchannels, and any one of them is selected as a subchannel for performing the synchronization process and the random access procedure, and also determines the CAP to be accessed.
  • the method of the present invention further includes a process of maintaining synchronization, including: continuing to search for a physical frame on the selected subchannel; parsing the SICH and the CCH in the found physical frame; and detecting the BCF from the found physical frame by using the parsing result, To get system parameters.
  • FIG. 7 is a flowchart of STA synchronization in an embodiment of the present invention.
  • the SICH timer and the BCF timer are set, and the STA continues to search for a physical frame on the selected subchannel, and starts the SICH timer and the BCF timer. If the SICH is successfully parsed before the SICH timer expires, the SICH timer is reset. If the BCF is successfully detected before the BCF timer expires, the BCF timer is reset and the physical frame is continued to be searched on the selected subchannel. When any of the two timers expires but the corresponding information is not successfully detected, the STA is considered to be out of synchronization and the channel needs to be scanned again.
  • the rescanning channel here specifically includes the following two implementations:
  • 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.
  • another available subchannel can be used as the selected subchannel, and the process of maintaining synchronization is performed again.
  • This implementation can be applied to the following application scenarios: After the process of acquiring synchronization ends, it is determined that more than one subchannel is available, and the current channel list has not expired. Of course, if there is no limit on the expiration of the channel list in the system, this implementation can also be used as a predetermined operation mode. When more than one available subchannel is determined when the process of acquiring synchronization is performed for the first time, the operation can be used. mode.
  • the timing of the SICH timer and the BCF timer can be flexibly set according to the application requirements. It can be seen that maintaining synchronization is a process in which the STA continuously searches for a physical frame on the selected subchannel, and continuously analyzes the SICH and detects the BCF. Since the SICH indicates the structure of the physical frame to which the subframe belongs, the STA can learn the start time of the next physical frame by using the parsing result of the current SICH while maintaining synchronization.
  • FIG. 8 is a flowchart of a method for random access in an embodiment of the present invention, where the process includes:
  • Step 81 Send a random access sequence to the CAP on any one of the subchannels.
  • the purpose of sending a random access sequence is to send an uplink transmission resource of a random access request to the CAP request.
  • any one of the subchannels herein refers to an available subchannel determined by the STA after the process of acquiring the synchronization of the system, and the selection of the channel is arbitrary, whereby multiple STAs can be dispersed in different subchannels.
  • Sending random access sequences avoids competition in one subchannel, reduces the probability of collisions, and improves the success rate of accessing the wireless network.
  • CAP-MAC refers to The lowest 7 bits of the MAC address of the CAP is the PN sequence index ( 0 ⁇ ⁇ 4 ), ⁇ is the cyclic shift parameter set, and _/ is the cyclic shift parameter index ( 0 ⁇ _ / ⁇ 8 ).
  • the random access sequence is transmitted in the uplink random access channel in the physical frame, using the uplink random access channel format indicated in the BCF.
  • 10a to 10c show the format of three uplink random access channels that can be selected in the embodiment of the present invention, which corresponds to the BCF example given in Table 4.
  • the selection of the uplink random access channel format includes the following cases:
  • Step 82 The CAP indicates the uplink transmission resource allocated according to the random access sequence.
  • the CAP uses broadcast signaling to indicate the allocated uplink transmission resources, and Table 5 below shows an example of the bits in the broadcast signal and their indication meanings.
  • the allocation 1 and the allocation 2 respectively correspond to one STA, and the allocation 1 is taken as an example.
  • the value of the STA passing the identification broadcast type is to allocate resources for the random access request frame, and the STA passes the random access sequence index and the random access sequence frequency domain loop.
  • the shift index and the system frame number of the random access occurrence of the lowest 3 bits and three items are used to find the corresponding uplink transmission resource from the broadcast signaling.
  • the PN sequence in Table 5 refers to a random access sequence
  • 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
  • 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.
  • the STA sends a random access sequence on a random access channel of any one of the subchannels;
  • 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;
  • the STA will randomly select the backoff value between [0 S ⁇ .C ⁇ mJ (the backoff window is not greater than the maximum backoff window), and the backoff unit is one frame, where m indicates the number of retransmissions;
  • the STA resends the random access sequence after the backoff counter is 0.
  • Step 83 Send a random access request frame to the CAP by using the uplink transmission resource allocated by the CAP.
  • the random access request encapsulation in the present invention is implemented in a random access request frame, and the following Table 6 gives an example of the frame body carrying information of the random access request frame. Table 6
  • the information carried by the frame body of the random access request frame includes the following:
  • 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.
  • 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.
  • Step 81 is executed. At this time, the random access sequence is retransmitted on the current subchannel, and the retransmission time is related to the random backoff introduced in the foregoing.
  • Step 84 Receive a random access response frame sent by the CAP.
  • the CAP indicates, by the broadcast signaling, the downlink transmission resource that sends the random access response frame to the STA.
  • Table 7 gives an example of the bits in the broadcast signaling and their indications.
  • the allocations 1 to 3 in Table 7 correspond to one STA, respectively, with the allocation 1 as an example, and the STA passes ⁇ . Identifying the broadcast type is to allocate resources for the random access response frame, and the STA determines the corresponding by the random access sequence index, the random access sequence frequency domain cyclic shift index, and the system frame number of the random access occurrence of the lowest 3 bits.
  • the PN sequence in Table 7 refers to a random access sequence
  • the signaling/feedback channel refers to a channel in which downlink signaling and feedback for uplink traffic are transmitted in the downlink transmission channel. Table 7
  • the resource allocated for the random access response is indexed at the start position of the signaling/feedback channel, the field value ranges from 1 to 63, and the field value is 0 indicates invalid indication b 23 b 2 2 ' Reserved
  • system frame number of random access occurs at least 3 bits
  • the resource allocated for the random access response is indexed at the beginning of the signaling/feedback channel, the value of the field ranges from 1 to 63, and the value of 0 indicates invalid indication b 39 b 3& Reserved b 4l b 40 , PN sequence index, field value 0 ⁇ 3
  • the resource allocated for the random access response is indexed at the starting position of the signaling/feedback channel, the value of the field is in the range of 1 to 63, and the value of 0 is the invalid indication b 55 , reserved
  • b, b 1Q "b 56 16-bit CRC is implemented in the random access response frame by the BSTAID plus 4 random access response in the embodiment.
  • Table 8 corresponds to the random access request frame given in Table 6 carrying information
  • Table 8 gives an example of the frame body carrying information of the corresponding random access response frame.
  • the information carried in the random access response frame includes the following:
  • 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.
  • the resource indication broadcast signal may be in the capability negotiation phase.
  • the TSTA ID is used to identify the uplink transmission resource allocated by the CAP to the STA. Since the STA may not successfully access the wireless network for various reasons, if the STA is assigned an official identifier within the CAP range in the random access phase, the identification resource will be wasted.
  • 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.
  • the CAP determines the access status according to the measurement result of the uplink signal.
  • the access status may be determined according to information such as the signal quality of the uplink channel.
  • the CAP determines the access status as successful.
  • the CAP determines the access status as abandonment, and the random access fails.
  • 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.
  • 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.
  • 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.
  • FIG. 11 is a flowchart of a method for capability negotiation in an embodiment of the present invention, where the process includes:
  • Step 111 The CAP allocates an uplink transmission resource.
  • 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.
  • the STA may wait for the maximum waiting frame interval of the basic capability negotiation request frame of the terminal, and if the CAP does not receive the allocation indication of the uplink transmission resource, the STA considers that the capability negotiation fails. , the random access process needs to be re-executed.
  • Step 112 Send a terminal basic capability negotiation request frame (SBC-REQ) to the CAP.
  • SBC-REQ terminal basic capability negotiation request frame
  • 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
  • the number of antennas of the STA 3 0 represents 1 antenna
  • Support spectrum aggregation mode 2 3 Support spectrum aggregation mode 1 and 2
  • a bitmap OR operation can indicate that the iz and 80MHz terminals operate on a 20MHz subchannel. Reserved 4 , the default setting is 0
  • STA maximum transmission 3 0 indicates that the number of streams is 1
  • the number of streams 1 means that the number of 3 ⁇ 4 is 2
  • 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
  • STA MCS can 0 does not support 256-QAM
  • STA LDPC can 0 does not support LDPC code length 1
  • Capability indicator 1 support STA 1 0: Not supported
  • MU-MIMO can 1 : Support
  • Subcarrier (not grouped);
  • Feedback mode combination 001 CSI - MIMO feedback
  • Feed channel format 2 1 Support
  • 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.
  • 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.
  • the STA supports spectrum aggregation.
  • the CAP can be used to learn the situation that the STA supports spectrum aggregation.
  • both STA and CAP may support 20MHz, 40MHz and 80MHz bandwidth, and the system includes four 20MHz subchannels, and the frequency aggregation mode 1 represents 20MHz, 40MHz.
  • 80MHz STAs can be scheduled to transmit independently on one or more 20MHz subchannels.
  • Spectrum aggregation mode 2 represents multiple consecutive subchannel aggregations, with continuous spectrum, and 40MHz and 80MHz STAs can be continuously transmitted in the frequency domain on the aggregation channel.
  • 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.
  • the maximum number of transmitted streams of the STA and the maximum number of received streams of the STA can be used to know the number of supported streams and the number of received streams.
  • the unequal modulation pointer here uses different modulation schemes for different traffic flows.
  • a MU-MIMO indication of the STA indicating the MU-MIMO capability of the STA, by which the MU-MIMO capability of the STA can be obtained.
  • Subcarrier Grouping Ns feedback capability is that the STA reports to the CAP the number of subcarriers between each two feedbacks it supports.
  • the MIMO feedback mode combination supported by the STA is that the STA reports its own supported MIMO feedback mode combination to the CAP.
  • 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.
  • 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.
  • the negotiation facilitates the complexity of the constraint implementation.
  • 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.
  • the maximum waiting frame interval of the basic capability negotiation response frame of the terminal may be awaited. If the basic capability negotiation response frame is not received, the capability negotiation fails. Random access process.
  • Step 113 Receive the terminal basic capability negotiation response frame (SBC-RSP) sent by the CAP.
  • SBC-RSP terminal basic capability negotiation response frame
  • 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.
  • 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.
  • 40MHz and 80MHz terminals work in multiple 20MHz subchannels Spectrum aggregation mode 2 0 No aggregation
  • Aggregation mode 1 discontinuous spectrum aggregation
  • Scheduling mechanism 1 0 Time division scheduling only
  • MCS indication 1 ⁇ 'i indicates STA Yes No Support
  • Tx STBC 1 0 is not supported
  • 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
  • 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
  • Subcarrier (not grouped);
  • Feedback mode combination 001 CSI - MIMO feedback
  • the information carried in the frame body of the terminal basic capability negotiation response frame includes the following:
  • 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.
  • the CAP may determine the parameter according to the STA maximum working bandwidth and the STA working subchannel mapping in the terminal basic capability request frame. Further, the CAP can report the maximum work reported by the STA according to the actual channel load and the like. The bandwidth is adjusted. For example, the STA reports its maximum working bandwidth to 80 MHz, and the CAP can be adjusted to 40 MHz or 20 MHz according to the actual situation.
  • the CAP determines, as far as possible, the subchannel indicated by the STA working subchannel mapping in the terminal basic capability negotiation request frame as the target subchannel to be switched by the STA, and also refers to the maximum working bandwidth of the STA or the maximum working bandwidth of the adjusted STA.
  • the final working subchannel mapping information is determined.
  • 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.
  • 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.
  • 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.
  • 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.
  • the Ns feedback capability is determined according to the subcarrier carrier Ns feedback capability carried in the terminal basic capability negotiation request frame, and the STA can perform feedback every few subcarriers, thereby saving feedback overhead.
  • 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.
  • Uplink signaling/feedback channel format 2 (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.
  • 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.
  • the STA may send an acknowledgment to the CAP when correctly receiving, and the STA may send an ACK.
  • 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.
  • GroupAck group acknowledgement
  • 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.
  • the STA may retransmit the 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.
  • the STA After the capability negotiation ends, the STA will switch to the target subchannel indicated by the CAP.
  • the device 12 is a schematic structural diagram of a terminal-side device accessing a wireless network according to the present invention.
  • the device includes: a device 121 for acquiring system synchronization, a random access terminal-side device 122, and a capability negotiation terminal-side device 123.
  • the device 121 for acquiring system synchronization is used to perform a process of acquiring the system synchronization with the CAP.
  • the random access terminal side device 122 is configured to randomly access the CAP.
  • the capability negotiation terminal side device 123 is configured to perform capability negotiation with the CAP.
  • the device for acquiring system synchronization in the present invention includes: a module for acquiring synchronization, and the module for acquiring synchronization includes: a first detecting unit, a first analyzing unit, and a first acquiring unit.
  • the first detecting unit is configured to search for a physical frame on the current subchannel.
  • the first parsing unit is configured to parse the physical frame that is found by the first detecting unit
  • SICH indicates a structure of a physical frame
  • CCH indicates allocation of system resources
  • the first acquiring unit is configured to obtain a system parameter from a physical frame that is searched by the first detecting unit by using a result of the parsing by the first parsing unit.
  • FIG. 13 is a schematic structural diagram of an apparatus for acquiring synchronization of a system according to an embodiment of the present invention.
  • the apparatus includes: a module 131 for acquiring synchronization, and the module 131 for acquiring synchronization includes: a first detecting unit 1311, a first parsing unit 1312, and a first The acquiring unit 1313.
  • the first detecting unit 1311 is configured to search for a physical frame on the current subchannel.
  • the first parsing unit 1312 is configured to parse the SICH and the CCH in the physical frame that the first detecting unit 1311 finds, wherein the SICH indicates a structure of a physical frame, and the CCH indicates allocation of system resources.
  • the first obtaining unit 1313 is configured to obtain the system parameters from the physical frame found by the first detecting unit 1311 by using the result parsed by the first parsing unit 1312.
  • the first acquiring unit 1313 may trigger the first detecting unit 1311 to transfer to the next subchannel to continue searching for physical frames until each subchannel in the predetermined channel list is traversed.
  • the first obtaining unit 1313 may use all subchannels that have acquired the system parameters as available subchannels, and select any one of the subchannels therefrom.
  • the first detecting unit 1311 finds a physical frame by detecting the frame header of the physical frame on the current subchannel.
  • the first detecting unit 1311 when the first detecting unit 1311 does not detect the frame header on the current subchannel, it continues to perform detection until the waiting time of the subchannel is exceeded, and shifts to the next subchannel to continue searching for the physical frame.
  • the first parsing unit 1312 parses the SICH and the CCH is unsuccessful, the first detecting unit 1311 is triggered to continue to perform the operation, and when the waiting time of the subchannel is exceeded, the first detecting unit 1311 is triggered to move to the next. A subchannel continues to look for physical frames.
  • the first obtaining unit 1313 detects a broadcast information frame BCF from the physical frame, and acquires system parameters from the BCF.
  • the first detecting unit 1311 is triggered to continue to perform the operation until the waiting time of the subchannel is exceeded, and the first detecting unit 1311 is triggered to transfer to the next subchannel to continue searching for the physical frame.
  • the device for acquiring synchronization in the embodiment of the present invention further includes a module 132 for maintaining synchronization, and the module 132 for maintaining synchronization includes: a second detecting unit 1321, a second analyzing unit 1322, and a second obtaining unit 1323.
  • the second detecting unit 1321 is configured to continue to search for a physical frame on the selected subchannel.
  • the second parsing unit 1322 is configured to parse the SICH and the CCH in the physical frame sought by the second detecting unit 1321.
  • the second obtaining unit 1323 is configured to detect, by using the parsing result of the second parsing unit 1322, the BCF from the physical frame sought by the second detecting unit 1321 to obtain an ear system parameter.
  • the module 132 that maintains synchronization further includes: a SICH timer 1324, a BCF timer 1325, and a determining unit 1326.
  • the second detecting unit 1321 further starts the SICH timer 1324 and the BCF timer 1325 when starting to search for a physical frame.
  • the determining unit 1326 is configured to determine whether the second parsing unit 1322 successfully parses the SICH before the SICH timer 1324 times out, and if so, resets the SICH timer 1324, otherwise the module 131 that triggers the acquisition synchronization re-executes the operation according to the channel list; Determining whether the second obtaining unit 1323 detects the BCF before the BCF timer 1325 times out, and if so, resetting the BCF timer 1325, and triggering the second detecting unit 1321 to continue searching for the physical frame on the selected subchannel, otherwise triggering acquisition
  • the synchronized module 131 re-executes operations in accordance with the channel list.
  • the module 131 for maintaining synchronization further includes: a SICH timer 1324, a BCF timer 1325, and a judging unit 1326.
  • the second detecting unit 1321 further starts the SICH timer 1324 and the BCF timer 1325 when starting to search for a physical frame.
  • the determining unit 1326 is configured to determine whether the second parsing unit 1322 successfully parses the SICH before the SICH timer 1324 times out. If yes, reset the SICH timer 1324, otherwise the module 131 that triggers the acquisition synchronization starts with the selected subchannel. And re-performing the operation according to the channel list; determining whether the second obtaining unit 1323 detects the BCF before the BCF timer 1325 times out, and if so, resetting the BCF timer 1325, and triggering the second detecting unit 1321 to select the selected sub-
  • the physical frame continues to be searched on the channel, otherwise the module 131 that triggers the acquisition synchronization starts with the selected subchannel and re-executes the operation according to the channel list.
  • the first obtaining unit 1313 further triggers the synchronization-maintaining module 132 to re-execute the sub-channel as the selected sub-channel after acquiring the system parameters on one sub-channel in the process of re-executing the operation. .
  • the module 132 that maintains synchronization further includes: a SICH timer 1324, a BCF timer 1325, and a decision unit 1326.
  • the second detecting unit 1321 further starts the SICH timer 1324 and the BCF timer 1325 when starting to search for a physical frame.
  • the determining unit 1326 is configured to determine whether the second parsing unit 1322 successfully parses the SICH before the SICH timer 1324 times out, and if yes, resets the SICH timer 1324, otherwise triggers the first acquiring unit 1313 to reselect one of the available subchannels. Determining whether the second obtaining unit 1323 detects the BCF before the BCF timer 1325 times out, and if so, resetting the BCF timer 1325, and triggering the second detecting unit 1321 to continue searching for the physical frame on the selected subchannel, otherwise triggering The first obtaining unit 1313 reselects one of the available subchannels.
  • the device may further include a module for determining whether the channel list is expired, and the module may monitor the module 131 for acquiring synchronization. The operation starts counting after it completes the channel list scan. After the set time is reached, the result of the channel list expiration is obtained.
  • the terminal side itself has a module that determines whether the channel list has expired, the module 132 that maintains synchronization can directly utilize the result of whether the channel list derived by the module expires.
  • the second detecting unit 1321 may determine the start time of the next physical frame by using the SICH in the found current physical frame on the selected subchannel.
  • the same structure and function in the three embodiments shown in Figs. 13 and 14 can be integrated in the same module that is kept in sync.
  • the apparatus for acquiring system synchronization in the embodiment of the present invention may further include: a synchronization unit that establishes synchronization with the CAP by using a system common clock in the system parameter.
  • the first random access terminal side device 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.
  • FIG. 15 is a schematic structural diagram of a device for a first random access terminal according to an embodiment of the present invention, where the device includes: a resource requesting unit 151, a random access requesting unit 152, and random access.
  • the resource requesting unit 151 is configured to send a random access sequence on any one of the subchannels, and receive an indication of the uplink transmission resource by the CAP within a set number of frames after the random access sequence is sent, if no indication of the uplink transmission resource is received, Resend the random access sequence.
  • the indication of the uplink transmission resource is carried in the system signaling, and the index of the random access sequence, the index of the frequency domain cyclic shift of the random access sequence, and the system frame number of the random access occurrence are identified. Further, the indication of the uplink transmission resource further carries a transmission timing advance amount.
  • the random access requesting unit 152 is configured to send a random access request to the CAP by using the uplink transmission resource allocated by the CAP according to the random access sequence.
  • the timing advance is performed in accordance with the transmission timing advance amount.
  • the random access response receiving unit 153 is configured to receive a random access response sent by the CAP. Further, the random access response may carry an access status indicating success or abandonment. When the access status indication is successful, the random access response may also carry the temporary target i allocated by the STA to which the device belongs in the CAP range. .
  • the first triggering unit 154 is configured to monitor the random access response receiving unit 153 within the set number of frames after the random access requesting unit 152 sends the random access request, if the random access response receiving unit 153 does not receive the random In response to the access, the trigger resource request unit 151 transmits a random access sequence.
  • the power control parameter reporting unit 155 is configured to notify the power control parameter reported by the random access request unit 152 for being carried in the random access request.
  • the resource indication receiving unit 156 is configured to receive an indication that the CAP sends a downlink transmission resource that sends the random access response.
  • the indication of the downlink transmission resource is carried in the system signaling, and the index of the random access sequence, the random access sequence frequency i or the cyclically shifted index, and the system frame number identifier of the random access occurrence are used. .
  • the second triggering unit 157 is configured to compare the address carried in the random access response with the address of the associated STA. If not, the trigger resource requesting unit 151 resends the random access sequence to the CAP.
  • the power control parameter adjustment unit 158 is configured to adjust the power control parameter according to the power control parameter adjustment value in the random access response.
  • the first random access terminal side device in the embodiment of the present invention may include all the units shown in FIG. 15 , but may also include only the portion shown in FIG. 15 according to application requirements.
  • the unit, therefore, Fig. 15 only shows an example of the structure of the random access terminal side device, and is not limited to its structure.
  • the second random access terminal side provided by the present invention includes: a random access request unit and a random access response connection unit.
  • the random access requesting unit is configured to send a random access request carrying a power control parameter to the CAP.
  • the random access response receiving unit is configured to receive a random access response sent by the CAP.
  • 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 .
  • the second random access terminal side device of the present invention may have an internal structure similar to that shown in FIG. 15, but there is no separate power control parameter reporting unit, and the random access request unit The random access request carrying the power control parameters is directly sent, and the functions of other units are the same.
  • the capability negotiation terminal side device in the present invention includes: a capability negotiation request unit and a capability negotiation response receiving unit.
  • the capability negotiation requesting unit is configured to send, by using an uplink transmission resource allocated by the CAP, a terminal basic capability negotiation request to the CAP.
  • the capability negotiation response receiving unit is configured to receive a terminal basic capability negotiation response that is sent by the CAP and carries the working subchannel mapping information.
  • the above working subchannel mapping information indicates the target subchannel to which the STA is to handover.
  • FIG. 16 is a schematic structural diagram of a capability negotiation terminal side device according to an embodiment of the present invention.
  • the device includes: a capability negotiation requesting unit 161, a capability negotiation response receiving unit 162, a confirming unit 163, a first triggering unit 164, a second triggering unit 165, and The configuration parameter providing unit 166.
  • the capability negotiation requesting unit 161 is configured to receive an allocation indication of the uplink transmission resource, and send, by using an uplink transmission resource allocated by the CAP, a terminal basic capability negotiation request to the CAP.
  • the capability negotiation response receiving unit 162 is configured to receive a terminal basic capability negotiation response that carries the working subchannel mapping information sent by the CAP.
  • the above working subchannel mapping information indicates the target subchannel to which the STA is to handover.
  • the terminal basic capability negotiation response may further include spectrum aggregation mode information and/or an official identifier, where the spectrum aggregation mode information is used to indicate a relationship between the target subchannels, and the official identifier is that the STA is within the CAP range. The official identification of the distribution.
  • the confirming unit 163 is configured to send an acknowledgement to the CAP after the capability negotiation response receiving unit 162 correctly receives the terminal basic capability negotiation response.
  • the first triggering unit 164 is configured to: after the random access terminal side device completes the operation, the monitoring capability negotiation requesting unit 161, if the capability negotiation requesting unit 161 does not receive the indication of the uplink transmission resource, triggering the random access
  • the terminal side device re-executes the operation.
  • the second triggering unit 165 is configured to: after the capability negotiation requesting unit 161 sends the terminal basic capability negotiation request, the monitoring capability negotiation response receiving unit 162, if the capability negotiation response receiving unit 162 does not receive the terminal basic capability negotiation response , triggering the random access terminal side device to perform the operation again.
  • the configuration parameter providing unit 166 is configured to provide the maximum working bandwidth of the STA to the capability negotiation request unit 161 for sending in the terminal basic capability negotiation request. Further, the configuration parameter providing unit 166 is further configured to provide the subchannel information available to the STA to the capability negotiation request unit 161 for sending in the terminal basic capability negotiation request.
  • the capability negotiation terminal side device in the embodiment of the present invention may include all the units shown in FIG. 16 , but may also include only some units shown in FIG. 16 according to application requirements. Therefore, Fig. 16 only shows an example of the structure of the capability negotiation terminal side device, and is not limited to its structure.
  • FIG. 17 is a schematic structural diagram of a network side device accessing a wireless network according to the present invention.
  • the device includes: a system parameter sending device 171, a random access network side device 172, and a capability negotiation network side device 173.
  • the system parameter transmitting device 171 is configured to send system parameters.
  • the random access network side device 172 is configured to permit random access of the terminal side device.
  • the capability negotiation network side device 173 is configured to perform capability negotiation with the terminal side device.
  • the first random access network side device 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.
  • FIG. 18 is a schematic structural diagram of a first random access wireless network side device according to an embodiment of the present invention, where the device includes: a resource allocation unit 181, a random access request receiving unit 182, and a random connection.
  • the resource allocation unit 181 is configured to receive a random access sequence sent by the STA on any one of the subchannels, and allocate an uplink transmission resource according to the random access sequence; send an indication of the uplink transmission resource; Allocating a downlink transmission resource, and transmitting the indication of the downlink transmission resource.
  • the indication of the uplink transmission resource is carried in the system signaling, and the index of the random sequence, the index of the frequency domain cyclic shift of the random access sequence, and the system frame number of the random access occurrence are identified. Further, the indication of the uplink transmission resource further carries a transmission timing advance amount, and indicates a timing advance amount at the time of uplink transmission.
  • the indication of the downlink transmission resource is carried in the system signaling, and is identified by an index of the random access sequence, an index of the random access sequence frequency or cyclic shift, and a system frame number generated by random access.
  • the random access request receiving unit 182 is configured to receive a random access request sent by using the uplink transmission resource.
  • the random access response unit 183 is configured to send a random access response to the STA.
  • the deleting unit 184 is configured to monitor the random access request receiving unit 182 within the set number of frames after the resource allocation unit 181 receives the random access sequence sent by the STA, if the random access request receiving unit 182 does not receive the Describe the random access request sent by the STA, delete all the information corresponding to the STA, or delete the information corresponding to the random access sequence.
  • the access state determining unit 185 is configured to determine, according to the measurement result of the uplink signal, that the access state of the STA is successful or abandoned, and send the access state to the random access response unit 183, where it is carried in the random connection. Sent in the response.
  • the temporary identifier assigning unit 186 is configured to allocate a temporary identifier to the STA within its own range when the access state determining unit 185 determines that the access status indication is successful, and send the temporary identifier to the random access response unit 183 for providing The bearer is sent in the random access response.
  • the power control parameter adjustment value determining unit 187 is configured to determine a power control parameter adjustment value according to the reported power control parameter carried in the random access request received by the random access request receiving unit 182, and send the power control parameter adjustment value to
  • the random access response unit 183 is configured to be carried in the random access response.
  • the random access network side device in the embodiment of the present invention may include all the units shown in FIG. 18, but may also include only some of the units shown in FIG. 18 according to application requirements, so FIG. 18 only gives An example of the structure of the random access network side device is not limited to its structure.
  • the second random access network side device 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.
  • 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.
  • 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.
  • the internal structure of the second random access network side device provided by the embodiment of the present invention is the same as that shown in FIG. 18, and the functions of each unit are similar.
  • the network side device for accessing a wireless network refers to a capability negotiation network side device.
  • the capability negotiation network side device in the present invention comprises: a capability negotiation request receiving unit and a capability negotiation response unit.
  • the capability negotiation request receiving unit receives a terminal basic capability negotiation request sent by the STA by using the allocated uplink transmission resource.
  • the capability negotiation response unit sends a terminal basic capability negotiation response carrying the working subchannel mapping information, where the working subchannel mapping information indicates the target subchannel to which the STA is to be handed over.
  • FIG. 19 is a schematic structural diagram of a capability negotiation network side device according to an embodiment of the present invention.
  • the device includes: a capability negotiation request receiving unit 191, a capability negotiation response unit 192, an acknowledgment receiving unit 193, a monitoring unit 194, a resource allocation unit 195, and a working device.
  • the capability negotiation request receiving unit 191 receives the terminal basic capability negotiation request sent by the STA by using the allocated uplink transmission resource.
  • the capability negotiation response unit 192 transmits a terminal basic capability negotiation response carrying the working subchannel mapping information, where the working subchannel mapping information indicates the target subchannel to which the STA is to be handed over.
  • the acknowledgment receiving unit 193 is configured to receive an acknowledgment sent by the STA after correctly receiving the basic capability negotiation response of the terminal.
  • the monitoring unit 194 is configured to monitor the acknowledgment receiving unit 193 after the capability negotiation response unit 192 sends the terminal basic capability negotiation response, and if the acknowledgment receiving unit 193 does not receive the acknowledgment, notify the capability negotiation request receiving unit 191.
  • the capability negotiation response unit 192 ends this operation. Further, before being triggered by the monitoring unit 194, the capability negotiation response unit 192 may resend the terminal basic capability negotiation response to the STA.
  • the resource allocation unit 195 is configured to allocate, by the STA, an uplink transmission resource that sends a basic capability negotiation request of the terminal, and send an allocation indication of the uplink transmission resource.
  • the working subchannel mapping information determining unit 196 is configured to determine the working subchannel mapping information, and send the working subchannel mapping information to the capability negotiation response unit 192 for being carried in the terminal basic capability negotiation response.
  • the sum of the bandwidths of the target subchannels indicated by the determined working subchannel mapping information is less than or equal to the maximum working bandwidth of the STA.
  • the working subchannel mapping information determining unit 196 may further adjust the maximum working bandwidth of the STA carried in the terminal basic capability negotiation request, and at this time, the working subchannel mapping information indicates the target subchannel.
  • the sum of the bandwidths is less than or equal to the adjusted maximum operating bandwidth of the STA.
  • the target subchannel indicated by the working subchannel mapping information determined by the working subchannel mapping information determining unit 196 includes one or more available subchannels of the STA.
  • the spectrum aggregation mode information providing unit 197 is configured to provide the frequency negotiation mode information indicating the relationship between the target subchannels to the capability negotiation response unit 192 for being carried in the terminal basic capability negotiation response.
  • the official identity assigning unit 198 the STA for the basic capability negotiation request of the sending terminal allocates an official identifier in its own range, and sends the formal identifier to the capability negotiation response unit 192 for carrying the basic capability negotiation response of the terminal. Sent in.
  • the official identification assigning unit 198 can obtain the information of the STA that is currently requesting capability negotiation from the capability negotiation request receiving unit 191, and assign an official identifier to the STA within its own scope.
  • the capability negotiation network side device in the embodiment of the present invention may include all the units shown in FIG. 19, but may also include only some of the units shown in FIG. 19 according to application requirements, so FIG. 19 only gives An example of the structure of the capability negotiation network side device is not limited to its structure.
  • FIG. 20 is a flowchart of a method for accessing a wireless network according to the present invention.
  • the method includes: Step 201: Generate a basic capability negotiation request of a terminal that carries a maximum working bandwidth of the STA, where the maximum working bandwidth of the STA indicates the maximum of the STA.
  • Working bandwidth is a basic capability negotiation request of a terminal that carries a maximum working bandwidth of the STA, where the maximum working bandwidth of the STA indicates the maximum of the STA.
  • Step 202 Send the terminal basic capability negotiation request.
  • 21 is a flow chart of another method for accessing a wireless network in the present invention, the method including:
  • Step 211 Generate a terminal basic capability negotiation request that carries a STA working subchannel mapping, where the STA working subchannel mapping indicates a subchannel available to the STA.
  • Step 212 Send the terminal basic capability negotiation request.
  • FIG. 22 is a method for accessing a wireless network according to another aspect of the present invention, the method includes: Step 221: Generate a terminal basic capability negotiation response that carries the working subchannel mapping information, so that the STA that receives the basic capability negotiation response of the terminal Switching to the target subchannel according to the working subchannel mapping information;
  • Step 222 Send the terminal basic capability negotiation response.
  • 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.

Abstract

L'invention concerne un procédé permettant d'accéder à un réseau sans fil, lequel procédé consiste à envoyer une demande de négociation des capacités de base d'un terminal à un point d'accès central (CAP); à recevoir une réponse de négociation des capacités de base d'un terminal envoyée par le point d'accès central et comprenant les informations de mappage d'un sous-canal d'exploitation, lesquelles informations indiquent un sous-canal cible vers lequel la station STA sera basculée. En outre, l'invention concerne un dispositif côté terminal et un dispositif côté réseau pour accéder à un réseau sans fil.
PCT/CN2012/072045 2011-03-31 2012-03-07 Procédé et dispositif pour accéder à un réseau sans fil WO2012130025A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201280012672.3A CN103609189B (zh) 2011-03-31 2012-03-07 用于接入无线网络的方法及装置

Applications Claiming Priority (12)

Application Number Priority Date Filing Date Title
CN201110081193.4 2011-03-31
CN201110081288.6 2011-03-31
CN201110081193 2011-03-31
CN201110081288 2011-03-31
CN201110130194.3 2011-05-19
CN201110130194 2011-05-19
CN201110188873 2011-07-06
CN201110188873.6 2011-07-06
CN201210035553 2012-02-16
CN201210035553.1 2012-02-16
CN 201210050568 CN102625464A (zh) 2011-03-31 2012-02-29 用于接入无线网络的方法及装置
CN201210050568.5 2012-02-29

Publications (1)

Publication Number Publication Date
WO2012130025A1 true WO2012130025A1 (fr) 2012-10-04

Family

ID=46565089

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2012/072045 WO2012130025A1 (fr) 2011-03-31 2012-03-07 Procédé et dispositif pour accéder à un réseau sans fil

Country Status (2)

Country Link
CN (2) CN102625464A (fr)
WO (1) WO2012130025A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103002031B (zh) * 2012-12-03 2016-07-13 惠州Tcl移动通信有限公司 一种控制访问无线路由设备的方法及系统
WO2015074237A1 (fr) 2013-11-22 2015-05-28 华为技术有限公司 Procédé d'émission de données et émetteur de données
US9923666B2 (en) * 2014-10-01 2018-03-20 Qualcomm, Incorporated Encoding in uplink multi-user MIMO and OFDMA transmissions
KR20190035610A (ko) * 2016-07-26 2019-04-03 광동 오포 모바일 텔레커뮤니케이션즈 코포레이션 리미티드 신호 전송 방법 및 기기
WO2018113127A1 (fr) * 2016-12-19 2018-06-28 华为技术有限公司 Procédé et dispositif de commande de canal
CN111314990B (zh) * 2018-11-13 2022-10-25 广东新岸线科技有限公司 一种超高速无线局域网终端接入设备
CN113609518B (zh) * 2021-06-18 2023-12-12 天津津航计算技术研究所 一种基于关联容器map的报文协议超时重发方法及系统

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060034219A1 (en) * 2004-08-11 2006-02-16 Daqing Gu Signaling in a wireless network with sequential coordinated channel access
WO2008084949A1 (fr) * 2007-01-09 2008-07-17 Lg Electronics Inc. Procédé d'exécution d'une procédure d'accès aléatoire dans un système de communication sans fil
CN101483913A (zh) * 2008-01-09 2009-07-15 中兴通讯股份有限公司 实现终端接入基站的方法及实现该方法的终端和基站

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101043256B (zh) * 2006-03-23 2013-03-27 电信科学技术研究院 Tdd模式的用户接入方法
CN101364980B (zh) * 2007-08-10 2012-06-20 华为技术有限公司 建立头压缩通信的方法及系统、头压缩策略功能实体
CN101925130A (zh) * 2009-06-16 2010-12-22 中兴通讯股份有限公司 多载波配置信息的发送方法及辅载波分配方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060034219A1 (en) * 2004-08-11 2006-02-16 Daqing Gu Signaling in a wireless network with sequential coordinated channel access
WO2008084949A1 (fr) * 2007-01-09 2008-07-17 Lg Electronics Inc. Procédé d'exécution d'une procédure d'accès aléatoire dans un système de communication sans fil
CN101483913A (zh) * 2008-01-09 2009-07-15 中兴通讯股份有限公司 实现终端接入基站的方法及实现该方法的终端和基站

Also Published As

Publication number Publication date
CN103609189B (zh) 2017-05-24
CN103609189A (zh) 2014-02-26
CN102625464A (zh) 2012-08-01

Similar Documents

Publication Publication Date Title
CN109156033B (zh) 与另一基本服务集重叠的基本服务集中的无线通信方法和无线通信终端
KR102051028B1 (ko) 무선 통신 시스템에서 데이터 전송 방법 및 이를 위한 장치
KR102462973B1 (ko) 무선 통신 시스템에서 데이터 전송 방법 및 이를 위한 장치
JP6423078B2 (ja) 無線通信システムにおけるアップリンク転送方法及びそのために装置
KR102451044B1 (ko) 무선 통신 시스템에서 데이터 전송 방법 및 이를 위한 장치
EP2545672B1 (fr) Accès multiple par répartition orthogonale de la fréquence (ofdma) de liaison descendante pour des ensembles de services avec des types de clients mixtes
KR101764955B1 (ko) 채널 통합 및 매체 접근 제어 재전송을 수행하는 방법 및 장치
WO2012130026A1 (fr) Procédé et dispositif pour accéder à un réseau sans fil
WO2016003056A1 (fr) Procédé et dispositif pour transmettre des données multiutilisateur de liaison montante dans un système de communication sans fil
US11018836B2 (en) Wireless communication method using trigger information, and wireless communication terminal
KR20230070239A (ko) 무선 통신 시스템에서 프레임을 송수신하기 위한 방법 및 무선 통신 단말
WO2012130025A1 (fr) Procédé et dispositif pour accéder à un réseau sans fil
WO2007082458A1 (fr) Procédé, dispositif et terminal d'accès aléatoire à une couche physique dans un système de communication mobile tdd à large bande
WO2016062135A1 (fr) Procédé et dispositif pour le partage de ressources entre stations dans un réseau local sans fil
EP2693825B1 (fr) Procédé et dispositif pour accéder à un réseau sans fil
WO2012130024A1 (fr) Procédé et dispositif pour transmission de données
EP4277175A1 (fr) Procédé de transmission/réception de données dans un système de communication sans fil, et terminal de communication sans fil
US20240163787A1 (en) Multi link device cooperation in wireless communication networks
WO2012130095A1 (fr) Procédé, station et point d'accès central utilisables dans une demande de ressource

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12763875

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12763875

Country of ref document: EP

Kind code of ref document: A1