WO2012130075A1 - 无线通信系统与设备 - Google Patents

无线通信系统与设备 Download PDF

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Publication number
WO2012130075A1
WO2012130075A1 PCT/CN2012/072781 CN2012072781W WO2012130075A1 WO 2012130075 A1 WO2012130075 A1 WO 2012130075A1 CN 2012072781 W CN2012072781 W CN 2012072781W WO 2012130075 A1 WO2012130075 A1 WO 2012130075A1
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WIPO (PCT)
Prior art keywords
channel
frame
current communication
uplink
communication frame
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PCT/CN2012/072781
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English (en)
French (fr)
Inventor
鲍东山
王竞
刘慎发
雷俊
潘立军
闫志刚
王飞飞
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.)
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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 CN201280012870.XA priority Critical patent/CN103430607B/zh
Publication of WO2012130075A1 publication Critical patent/WO2012130075A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W99/00Subject matter not provided for in other groups of this subclass
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053Allocation of signaling, i.e. of overhead other than pilot signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026Transmission of channel quality indication
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0057Physical resource allocation for CQI
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0091Signaling for the administration of the divided path
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0091Signaling for the administration of the divided path
    • H04L5/0096Indication of changes in allocation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/14Two-way operation using the same type of signal, i.e. duplex
    • H04L5/1469Two-way operation using the same type of signal, i.e. duplex using time-sharing
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W28/00Network traffic management; Network resource management
    • H04W28/02Traffic management, e.g. flow control or congestion control
    • H04W28/06Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/08Access restriction or access information delivery, e.g. discovery data delivery
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446Resources in time domain, e.g. slots or frames
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/23Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/50Allocation or scheduling criteria for wireless resources
    • H04W72/54Allocation or scheduling criteria for wireless resources based on quality criteria

Definitions

  • the invention belongs to the field of wireless communications, and in particular relates to a wireless communication system and device. Background technique
  • wireless communication systems applied to medium and short communication distances include 802.11-based wireless LAN technology WiFi, 802.15-based Bluetooth (Bluetooth) system, and Femto technology for indoor applications generated by mobile communication systems. .
  • 802.11-based WiFi technology is one of the most widely used wireless network transmission technologies today. Since the WiFi system uses the Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) mechanism, the system efficiency is better 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 an access point (AP, Access Point) and a station (STA, Station), or between different STAs. Through the CSMA/CA mechanism, the right to use wireless resources is competed, and at the same time, the wireless channel is competed, and collision occurs at this time, resulting in waste of wireless resources. In order to avoid collisions, the CSMA/CA mechanism requires the AP or STA to randomly retreat when competing for the wireless channel.
  • AP Access Point
  • STA station
  • 802.11 systems are less efficient.
  • 802. l lg system physical layer peak rate can be Up to 54 Mbps, but the Transmission Control Protocol (TCP) layer can reach a rate of no more than 30 Mbps in the big packet download service. Under the small packet service, the peak rate is lower due to the increased overhead ratio. .
  • TCP Transmission Control Protocol
  • the 802.11 system is flexible and does not rely on a centralized control mechanism, so it can also 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-rate data access solutions are especially important.
  • Femto base stations called pico base stations, are compact (similar to Wi-Fi) and flexible to deploy. 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 and fewer access user features, which reduces the processing power of the device and reduces the cost of the device.
  • the Femto base station can be divided into two types of duplex mechanisms: FDD (Frenqucy Division Duplexing) and Time Division Duplexing (TDD).
  • FDD Frequcy Division Duplexing
  • TDD Time Division Duplexing
  • 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 allocates different radio resources for the uplink and downlink by dividing the time resources. Therefore, the FDD can better adapt to the asymmetric data services of the upper and lower industries.
  • the TDD duplex mode of the mobile communication system including the Femto system
  • the static allocation of uplink and downlink resources and the various data services of different needs, such as: browsing web pages, mobile video, mobile games, machine-to-machine (M2M, machine -to-machine ), etc.
  • M2M machine-to-machine
  • Wi-Fi because Femto uses a centralized control mechanism based on scheduling, there is no waste of radio resources between the base station or the AP and the terminal, or between the terminals due to collision and random backoff. Higher.
  • the Femto system also allocates radio resources for different terminals by scheduling uplink and downlink communication
  • the statically configured frame structure cannot match the flexible allocation of radio resources in the uplink and downlink, and cannot adapt to service changes with a small granularity.
  • the service and resource configuration are unbalanced, it may cause long-term queuing, the user experience is reduced, or the channel capacity is wasted.
  • the technical problem to be solved by the present invention is to provide a wireless communication system and device, so as to dynamically divide uplink and downlink wireless transmission resources not only based on service requirements, but also to dynamically adapt to future rich and diverse features. Data business needs.
  • a wireless communication system comprising: a network device and at least one terminal device, wherein: the network device dynamically configures a structure and a frame length of a current communication frame, and transmits frame structure configuration information of a current communication frame in a current communication frame;
  • the terminal device determines the structure and frame length of the current communication frame by detecting frame structure configuration information of the current communication frame.
  • a network device including:
  • a configuration unit that dynamically configures the structure and frame length of the current communication frame
  • the sending unit sends the frame structure configuration information of the current communication frame in the current communication frame.
  • the current communication frame includes at least a downlink subframe.
  • the downlink subframe includes at least a preamble sequence and a system information channel.
  • the sending unit sends frame structure configuration information of the current communication frame on the system information channel.
  • the sending unit further sends frame length configuration information of the current communication frame on the system information channel.
  • the downlink subframe further includes at least one of the following channels:
  • a downlink transport channel for transmitting downlink traffic, and/or downlink control signaling, and/or feedback; and a downlink sounding channel for measuring and estimating downlink channel quality and/or state.
  • the downlink sounding channel is located in the middle of the downlink transport channel.
  • the structure of the current communication frame further includes an uplink subframe.
  • a guard interval is further included between the downlink subframe and the uplink subframe.
  • the uplink subframe includes at least one of the following channels:
  • An uplink transport channel for transmitting uplink traffic, and/or uplink signaling, and/or feedback; an uplink sounding channel for uplink channel quality and/or state measurement and estimation;
  • the uplink scheduling request channel is used by the terminal device to trigger an uplink scheduling request or signaling feedback; and the uplink random access channel is used to transmit uplink access signaling or signaling feedback.
  • the downlink subframe further includes a control channel, configured to indicate a transmission resource allocation and scheduling, and a transmission format of a channel occupying the transmission resource.
  • a control channel configured to indicate a transmission resource allocation and scheduling, and a transmission format of a channel occupying the transmission resource.
  • the system information channel and the control channel multiplex resources by one of a time division multiplexing, a frequency division multiplexing, and a code division multiple access.
  • the sending unit sends, in the system information channel, part of the frame structure configuration information of the current communication frame, where at least the duration of the control channel is included, and another frame structure configuration of the current communication frame is sent on the control channel. information.
  • the configuration unit determines the scheduled transmission resource according to the scheduling information, and dynamically configures the structure and frame length of the current communication frame that matches the scheduled transmission resource.
  • the sending unit sends the frame structure configuration information of the current communication frame by using at least one channel of the current communication frame.
  • the sending unit further sends the frame length configuration information of the current communication frame by using at least one channel of the current communication frame.
  • the device further includes:
  • the communication unit communicates with the terminal device through a selectively configured channel in the current communication frame.
  • the method includes: performing one or more of: transmitting, by using at least one selectively configured channel in the current communication frame, a transmission resource allocation and scheduling, and a channel occupying the transmission resource.
  • Information of the transport format
  • the initial access channel information is received by at least one selectively configured channel in the current communication frame.
  • a terminal device comprising:
  • Receiving unit receiving frame structure configuration information of the current communication frame;
  • the detecting unit detects the structure and frame length of the current communication frame by detecting the frame structure configuration information of the current frame.
  • the current communication frame includes at least a downlink subframe.
  • the downlink subframe includes at least a preamble sequence and a system information channel.
  • the receiving unit receives frame structure configuration information of the current communication frame on the system information channel.
  • the receiving unit further receives frame length configuration information of the current communication frame on the system information channel.
  • the downlink subframe further includes at least one of the following channels:
  • a downlink transport channel for transmitting downlink traffic, and/or downlink control signaling, and/or feedback; and a downlink sounding channel for measuring and estimating downlink channel quality/state.
  • the downlink sounding channel is located in the middle of the downlink transport channel.
  • the structure of the current communication frame further includes an uplink subframe.
  • a guard interval is further included between the downlink subframe and the uplink subframe.
  • the uplink subframe includes at least one of the following channels:
  • An uplink transmission channel for transmitting uplink traffic, and/or uplink signaling, and/or feedback; an uplink sounding channel for uplink channel quality/state measurement and estimation;
  • An uplink scheduling request channel configured to trigger an uplink scheduling request or signaling feedback by the terminal device
  • an uplink random access channel configured to transmit uplink access signaling or signaling feedback
  • the uplink scheduling request channel, the uplink random access channel, and the uplink transmission channel are multiplexed by one of a time division multiplexing, a frequency division multiplexing, and a code division multiple access.
  • the downlink subframe further includes a control channel, configured to indicate a transmission resource allocation and scheduling, and a transmission format of a channel occupying the transmission resource.
  • a control channel configured to indicate a transmission resource allocation and scheduling, and a transmission format of a channel occupying the transmission resource.
  • the receiving unit receives frame structure configuration information of a part of the current communication frame on the system information channel, where at least the duration of the control channel is included, and a frame structure configuration of another part of the current communication frame is received on the control channel. information.
  • the device further includes:
  • the calculating unit calculates the frame length of the current communication frame according to the structure of the current communication frame determined by the detecting unit.
  • the receiving unit receives frame structure configuration information of the current communication frame by using at least one channel of the current communication frame.
  • the receiving unit further receives frame length configuration information of the current communication frame by using at least one channel of the current communication frame.
  • the device further includes:
  • the communication unit communicates with the network device through at least one selectively configured channel in the current communication frame.
  • the communication unit when the communication unit communicates with the network device, perform one or more of the following operations:
  • the initial access channel information is transmitted over at least one selectively configured channel in the current communication frame.
  • the base station or the CAP centrally schedules the terminal or STA associated with it to allocate radio resources to different terminals or STAs, thereby avoiding waste of radio resources caused by the competition mechanism;
  • Dynamic TDD frame length and frame structure configuration flexible uplink and downlink resource ratio configuration, improve system efficiency, save control overhead and scheduling overhead for indoor scenarios, dynamically divide uplink and downlink wireless resources based on service requirements, Better dynamic adaptation to the uplink and downlink transmission requirements of various types of data services with different characteristics in the future, without fixed frame length or frame duration constraints, flexible frame structure, and reduced implementation complexity;
  • the invention can better adapt to the dynamic changes of various data service requirements, dynamically match the channel capacity with the service demand, and obtain better system efficiency. Optimize the frame structure and optimize system overhead for different wireless communication scenarios. It is possible to weigh the service requirements and channel characteristics, dynamically divide the uplink and downlink resources, and dynamically allocate radio resources for different terminals under the condition of link adaptation;
  • the present invention also considers channel state information feedback delay, the demand for processing time of different level devices, and the like. All of the above considerations can improve system efficiency and performance;
  • This frame feedback can be implemented to reduce the feedback delay of multi-user multiple input and multiple output (MU-MIMO);
  • This frame scheduling can be implemented, which reduces the scheduling delay of the service.
  • FIG. 1 is a schematic diagram of a frame structure according to Embodiment 1 of the present invention.
  • Embodiment 2 is a schematic diagram of a frame structure provided by Embodiment 2 of the present invention.
  • Embodiment 3 is a schematic diagram of a frame structure provided by Embodiment 3 of the present invention.
  • Embodiment 4 is a schematic diagram of a frame structure provided by Embodiment 4 of the present invention.
  • FIG. 5 is a schematic diagram of a frame structure provided by Embodiment 5 of the present invention.
  • Embodiment 6 is a schematic diagram of a frame structure provided by Embodiment 6 of the present invention.
  • Embodiment 7 is a schematic diagram of a frame structure provided by Embodiment 7 of the present invention.
  • FIG. 8 is a schematic diagram of an uplink and downlink transmission and reception protection interval setting according to Embodiment 8 of the present invention
  • FIG. 9 is a schematic diagram of a frame structure provided by Embodiment 9 of the present invention.
  • FIG. 10 is a schematic diagram of a frame structure provided by Embodiment 10 of the present invention.
  • Embodiment 11 is a schematic diagram of a frame structure provided by Embodiment 11 of the present invention.
  • FIG. 12 is a schematic diagram of a frame structure of an uplink and downlink scheduling transmission process according to Embodiment 12 of the present invention.
  • FIG. 13 is a schematic structural diagram of a wireless communication system provided by the present invention.
  • FIG. 14 is a schematic structural diagram of a network device provided by the present invention.
  • FIG. 15 is a schematic structural diagram of a terminal device provided by the present invention. detailed description
  • the core of the present invention is: the network device dynamically configures the structure and frame length of the current communication frame, and transmits the frame structure configuration information of the current communication frame in the current communication frame, and the terminal device detects the current communication frame by detecting the frame structure configuration information. Structure and frame length.
  • the meaning of the above structure includes: the presence or absence of each channel in the communication frame.
  • the present invention dynamically configures the frame structure to make the frame structure flexible and flexible, and can dynamically divide the uplink and downlink radio resources based on service requirements, which is better.
  • the system can provide very small resource granularity, which can not only adapt to the large service rate change of different terminal equipment, but also better adapt to the dynamic change of the wireless channel.
  • the present invention can not only reduce the control overhead and scheduling overhead for indoor applications, but also meet the requirements of rapid outdoor changes, and at the same time reduce the complexity of implementation.
  • the present invention can balance the service requirements and channel characteristics, dynamically divide the uplink and downlink resources, and dynamically allocate radio resources for different terminal devices under the condition of link adaptation.
  • the network device mentioned in the present invention is not limited to a CAP, but may be a base station or other network device, and the terminal device is not limited to a STA, but may also be a terminal or other terminal device.
  • the communication frame in the present invention is based on a TDD duplex mode (on a fixed carrier, the network device and the terminal device complete reception and transmission by transceiving and switching time division), and each communication frame includes a downlink (DL, Downlink, from From the network device to the terminal device, the transmission and uplink (UL, Uplink, from the terminal device to the network device direction) transmit two parts, but the duration of the downlink transmission and the uplink transmission can be dynamically configured, and then the frame length of each communication frame can also be Dynamic changes.
  • the network device can indicate the structure, or structure and frame length of each communication frame by the following two methods.
  • the first method indicates the frame structure through the system information channel.
  • the network device transmits system basic configuration information and frame structure configuration information of the current frame through the system information channel.
  • the basic configuration information of the above system includes a frequency band configuration, an antenna configuration, a frame number, and the like.
  • the frame structure configuration information may include the following: duration of each channel or part of the channel in the frame; configuration of each channel or part of the channel in the frame.
  • the duration of the channel can be implemented in multiple bits. When the duration of the channel is zero, it implicitly indicates that the channel is not included in the communication frame.
  • the configuration of the channel includes one or more of the presence, location, and presence of the channel. The existence of the channel can be implemented by lbit, indicating the presence or absence of the channel, and can be used for some fixed-length messages.
  • the duration of the channel is indirectly known to be a fixed duration; the presence and duration of the channel can be implemented by using multiple bits, indicating whether the channel is present or not, and indicating the duration of the channel, which can be used for Some channels that are not fixed in duration.
  • the frame structure configuration information of the present invention may include: a control channel duration, a downlink transmission channel duration, a downlink sounding channel configuration, an uplink sounding channel configuration, an uplink scheduling request channel configuration, an uplink transmission channel duration, and an uplink random connection.
  • a control channel duration a downlink transmission channel duration
  • a downlink sounding channel configuration a downlink sounding channel configuration
  • an uplink sounding channel configuration an uplink scheduling request channel configuration
  • an uplink transmission channel duration may include: a random connection.
  • All the terminal devices associated with the network device obtain the frame structure configuration information by detecting the system information channel, thereby determining the frame structure, and further calculating the frame length of the frame according to the frame structure, for example, the duration of each part in the frame structure. Xianglikou.
  • the network device may also send the frame length configuration information on the system information channel, and all the terminal devices associated with the network device obtain the frame length configuration information by detecting the system information channel, and directly obtain the frame length of the current frame, and do not need to calculate.
  • the second method jointly indicates the frame structure through the system information channel and the control channel.
  • the network device jointly transmits the frame structure configuration information of the current frame through the system information channel and the control channel.
  • All the terminal devices associated with the network device obtain the frame structure configuration information by detecting the system information channel and the control channel, thereby determining the frame structure, and further calculating the frame length of the frame according to the frame structure.
  • the network device may send the frame length configuration information through the system information channel, or jointly send the frame length indication information through the system information channel and the control channel, and all the terminal devices associated with the network device can directly determine the frame length configuration information.
  • the frame length of this frame may be sent to the network device.
  • Each frame includes at least a downlink subframe, and may further include an uplink subframe, and the downlink subframe and the uplink subframe are divided into different channels according to functions, and each channel divides different fields according to functions.
  • FIG. 1 is a schematic diagram of a frame structure according to Embodiment 1 of the present invention.
  • the abscissa indicates time and the ordinate indicates frequency.
  • the frame includes only downlink subframes and guard intervals.
  • the downlink subframe includes at least a preamble sequence and a system information channel.
  • the duration of the preamble sequence and the system information channel is preset, and the network device does not need to be indicated in the frame structure indication information. Therefore, the frame structure indication information in this embodiment indicates a communication frame other than the preamble sequence and the system information channel. The presence and configuration of other channels in the middle.
  • the preamble sequence can be divided into a short training sequence and a long training sequence.
  • the short training sequence is used for frame detection, automatic gain control, coarse frequency synchronization or coarse symbol synchronization
  • the long training sequence is used for fine frequency synchronization, fine symbol synchronization or channel estimation.
  • System information channel used to send system basic configuration information and frame structure configuration information.
  • the system information channel can be further used to transmit frame length configuration information.
  • the network device broadcasts frame structure configuration information on the system information channel.
  • All the terminal devices associated with the network device can determine that only the preamble sequence and the system information channel are included in the current communication frame by using the frame structure configuration information.
  • FIG. 2 is a schematic diagram of a frame structure provided by Embodiment 2 of the present invention.
  • the downlink subframe may further include a control channel and a downlink transmission channel on the basis of FIG. 1.
  • Control channel used to transmit the allocation and scheduling of transmission resources, and the transmission format of the channel occupying the transmission resources.
  • the control channel may indicate allocation and scheduling of transmission resources of one or more of the downlink transmission channel, the downlink sounding channel, the uplink transmission channel, the uplink sounding channel, the uplink scheduling request channel, and the uplink random access channel. And the transmission format of these channels.
  • the downlink transmission channel is used by the network device to transmit downlink traffic, and/or downlink control signaling, and/or feedback information to the terminal device.
  • the feedback here can point to feedback on the upstream service.
  • Each terminal device can share downlink transmission resources by combining time division, frequency division, code division, space division or the above multiplexing manner.
  • FIG. 3 is a schematic diagram of a frame structure provided by Embodiment 3 of the present invention.
  • an uplink subframe may be included on the basis of FIG. 2, and the uplink subframe includes an uplink transport channel.
  • the uplink transport channel is used by the terminal device to transmit uplink service data, and/or uplink signaling, and/or feedback information to the network device.
  • the feedback herein may include feedback for downlink traffic, and may also include feedback on downlink channel quality information (CQI) and/or downlink channel state information (CSI).
  • CQI downlink channel quality information
  • CSI downlink channel state information
  • Each terminal device can share uplink transmission resources by combining time division, frequency division, code division, space division or the above multiplexing manner.
  • the frame structure can be indicated by bit (bit) bits in the system information channel.
  • bit (bit) bits in the system information channel.
  • the duration of the control channel is indicated by 6 bits, and the 6 bits can indicate a maximum of 63 OFDM symbols, and the minimum allocation unit of resources: 1 OFDM symbol. For example: If the 6bits is 010000, the conversion to a decimal number is 16, corresponding to 16 OFDM symbols.
  • 9 bits are used to indicate the duration of the downlink transmission channel, which is a maximum of 511 OFDM symbols. For example: If the 9bit is 100000000, the conversion to decimal is 256, corresponding to 256 OFDM symbols.
  • 9 bits are used to indicate the duration of the uplink transmission channel, which is a maximum of 511 OFDM symbols.
  • the guard interval can be indicated by lbit, which is a total of 1 OFDM symbol. Or the system information channel does not indicate the guard interval, but the system is configured.
  • the method for indicating the downlink transmission channel or the uplink transmission channel resource allocation of the control channel is as follows:
  • Nbit is used to indicate the starting position of a certain STA in the downlink transmission channel, and Nbit is used to indicate how many consecutive STAs are in the position.
  • Mbit is used to indicate the starting position of a certain STA in the uplink transmission channel, and Mbit is used to indicate how many bits of the STA are allocated resources after the location.
  • the frame structure may also be indicated by the system information channel and the control channel, as follows: In the system information channel, the duration of the control channel is indicated by 6 bits; In the control channel, 9 bits are used to indicate the duration of the downlink transmission channel, and 9 bits is used to indicate the duration of the uplink transmission channel.
  • the signaling can be separated from the service in the uplink and downlink transmission, each control channel or transmission channel is set, and the duration of the control channel and the duration of the uplink and downlink transmission channels are indicated in the system information channel.
  • the network device informs the associated terminal device control channel duration, uplink and downlink transmission channel duration, and guard interval setting through the system information channel.
  • Each terminal device associated with the network device can obtain the control channel duration, the downlink transmission channel duration, and the uplink transmission channel duration by detecting the frame structure configuration information of the system information channel.
  • the frame length of the current frame is determined by summing the duration of the preamble sequence, the duration of the system information channel, the duration of the control channel, the duration of the downlink transmission channel, the duration of the guard interval, and the duration of the uplink transport channel. Or if the network device indicates the frame length of the current frame in the system information channel, the terminal device directly obtains the frame length, and no calculation is needed.
  • Embodiment 4 is a schematic diagram of a frame structure provided by Embodiment 4 of the present invention.
  • a downlink sounding channel is set in a downlink subframe, and a downlink sounding channel is used for downlink channel quality and/or state measurement and estimation. If the duration of the downlink sounding channel is configured, the presence or absence of the downlink sounding channel is indicated by lbit in the system information channel. As shown in FIG. 4, the downlink sounding channel is located behind the downlink transport channel.
  • FIG. 5 is a schematic diagram of a frame structure provided by Embodiment 5 of the present invention, where a downlink sounding channel is located in the middle of a downlink transport channel.
  • downlink MU-MIMO system performance is not only sensitive to downlink channel state information delay, but multi-user MIMO involves large signal processing complexity.
  • the downlink sounding channel position is fixed, it can be used in the system information channel to indicate whether the downlink sounding channel is present or not. If there are terminals or STAs with different processing capabilities in the system, the downlink sounding channel position is variable. At this time, it is necessary to indicate not only the presence or absence of the downlink sounding channel but also the duration of the two downlink transmission channels in FIG. 5 in the system information channel.
  • the two downlink transmission channel duration indications can be used in the following three ways:
  • the total duration of the downlink transmission channel and the duration of the downlink transmission channel 2 are respectively indicated.
  • the downlink sounding channel position is set by the above dynamic or semi-static setting to provide sufficient processing time for devices with different processing capabilities.
  • the frame structure can be indicated by a bit in the system information channel. Examples are as follows:
  • 6 bits are used to indicate the control channel duration, and the maximum is 63 OFDM symbols; 9 bits are used to indicate the total duration of the downlink transmission channel, 511 OFDM symbols, 7 bits are used to indicate the duration of the downlink transmission channel 2, 80 OFDM symbols; 9 bits are used.
  • the downlink sounding channel positions 1, 2, and 3 are all system-defined determined positions; 2bits are used to indicate the uplink sounding channel configuration, and 0, 1, 2, and 4 OFDM symbols are respectively indicated; 2bits is used to indicate the uplink scheduling request channel configuration, respectively indicating 1 2, 3, 4 OFDM symbols; use lbit to indicate the uplink random access channel configuration, indicating whether there are two cases, if any, only 1 OFDM symbol.
  • the frame structure may be jointly indicated by the system information channel and the control channel, as follows: In the system information channel, the duration of the control channel is indicated by 6 bits; and in the control channel, 9 bits is used to indicate the total duration of the downlink transmission channel, 7 bits is used to indicate the duration of the downlink transmission channel 2, 9 bits is used to indicate the duration of the uplink transmission channel, and 2 bits is used to indicate the downlink sounding channel. Configuration.
  • Each terminal device associated with the network device can obtain a control channel duration, a downlink transmission channel duration, a downlink sounding channel duration, a downlink transmission channel duration, a guard interval duration, and a preamble by detecting a frame structure configuration of the system system information channel.
  • the sequence duration, the length of the system information channel, the duration of the control channel, the duration of the downlink transmission channel, the duration of the downlink sounding channel, the duration of the downlink transmission channel, the duration of the guard interval, and the duration of the uplink transport channel are summed to obtain the frame length of the current frame. Or if the network device indicates the frame length of the current frame in the system information channel, the terminal device directly obtains the frame length of the current frame.
  • FIG. 6 is a schematic diagram of a frame structure provided by Embodiment 6 of the present invention.
  • Some auxiliary channels may be set in the uplink subframe, for example: one or more of an uplink detection channel, an uplink scheduling request channel, or an uplink random access channel are set in the uplink subframe.
  • the uplink sounding channel is used for the terminal device to trigger the uplink scheduling request or the uplink fast feedback; the uplink random access channel is used for the initial access of the terminal device, or Terminal device scheduling request.
  • the configuration of the uplink detection channel, the uplink scheduling request channel, and the uplink random access channel may be respectively indicated in the system information channel.
  • auxiliary channel has a fixed physical layer channel format (for example, occupying 1 or several symbol durations)
  • only one bit of the channel information may be indicated in the system information channel, for example: an uplink random access channel, in The system information channel is indicated by lbit. If the bit is 0, the uplink random access channel is not configured. If the bit is 1, the uplink random access channel is configured, and only one OFDM symbol is indicated.
  • the auxiliary channel does not have a fixed physical layer channel format, the configuration may be indicated by using 2 bits. For example, the uplink sounding channel is indicated by 2 bits in the system information channel. If the value is 00, the uplink sounding channel is not configured. The uplink sounding channel is 0 OFDM symbols. If the value is 01, the uplink sounding channel is 1 OFDM symbol. If the value is 10, the uplink sounding channel is 2 OFDM symbols. If the value is 11, the uplink sounding is detected. The channel is 4 OFDM symbols.
  • Figure 6 is only an example of the frame structure included in all three auxiliary channels. In actual situations, some auxiliary channels may not be considered depending on the system application scenario or scheme.
  • the frame structure can be indicated by a bit in the system information channel. Examples are as follows:
  • the system information channel 6 bits are used to indicate the control channel duration, and the maximum is 63 OFDM symbols; 9 bits is used to indicate the downlink transmission channel duration, and the maximum 511 OFDM symbols; 9 bits are used to indicate the uplink transmission channel duration, and the maximum 511 OFDM symbols are indicated by 2 bits;
  • the uplink sounding channel configuration respectively indicates 0, 1, 2, and 4 OFDM symbols;
  • the uplink scheduling request channel configuration is indicated by 2 bits, and the 1, 2, 3, and 4 OFDM symbols are respectively indicated;
  • the uplink random access channel configuration is indicated by 1 bit, Indicates yes and no, respectively, when there is an uplink random access channel, it is fixed to 1 OFDM symbol.
  • the frame structure may be jointly indicated by the system information channel and the control channel, as follows: In the system information channel, 6 bits are used to indicate the duration of the control channel, and 1 bit is used to indicate the uplink random access channel configuration; and in the control channel, 9 bits is used to indicate the downlink.
  • the length of the transmission channel is 9 bits indicating the duration of the uplink transmission channel, 2 bits is used to indicate the uplink sounding channel configuration, and 2 bits is used to indicate the uplink scheduling request channel configuration.
  • Each terminal device associated with the network device can obtain the control channel duration, the downlink transport channel duration, the uplink transport channel duration, and the uplink sounding channel by using the frame structure of the system information channel broadcast.
  • Configuration, uplink scheduling request channel configuration, and uplink random access channel configuration, and by the duration of the preamble sequence, the duration of the system information channel, the duration of the control channel, the duration of the downlink transmission channel, the duration of the guard interval, the duration of the uplink sounding channel, and the duration of the uplink scheduling request channel The sum of the uplink transmission channel duration and the uplink random access channel duration is performed to obtain the frame length of the current frame. Or if the network device indicates the frame length of the current frame in the system information channel, the terminal device directly obtains the frame length of the current frame, and no calculation is needed.
  • FIG. 7 is a schematic diagram of a frame structure provided by Embodiment 7 of the present invention.
  • the downlink sounding channel is set in the downlink subframe, and the uplink sounding channel, the uplink scheduling request channel, and the uplink random access channel are also set in the uplink subframe.
  • some auxiliary channels may not be considered depending on the system application scenario or scheme.
  • FIG. 8 is a schematic diagram of an uplink and downlink transmission and reception protection interval setting according to Embodiment 8 of the present invention.
  • the invention needs to reserve the transmission and reception conversion time for the network device and the terminal device. For example: When a network device and a terminal device are converted from DL to UL, their RF channel is converted into a receiving or transmitting state by transmitting or receiving; when the network device and the terminal device are converted from UL to DL, the RF channel is converted by receiving or transmitting. For transmitting or receiving status.
  • the first to sixth embodiments shown in FIG. 1 to FIG. 6 only the guard interval of the DL to UL transition is reserved, and the guard interval of the UL to DL transition is reserved in advance by the base station or the CAP, that is, the uplink is to be uplinked.
  • the transmission time is advanced, and the protection interval of the UL to DL transition is reserved for the network device and the terminal device, as shown in FIG. 8.
  • the downlink to uplink protection interval GI shown in FIG. 1 to FIG. 7 is not less than the network device and The maximum DL to UL of the terminal device and the protection time of UL to DL.
  • the scheme shown in Figure 9 can also be considered to set the guard interval separately.
  • FIG. 9 is a schematic diagram of a system frame structure provided by Embodiment 9 of the present invention.
  • the protection interval downlink protection interval (DGI) and the uplink protection interval (UGI) may be respectively set for the uplink to the downlink and the downlink to the uplink in the system information channel, where the downlink protection interval is downlink to uplink transmission and reception.
  • the guard interval is an uplink to downlink transmit and receive guard interval.
  • the frame structure can be indicated by a bit in the system information channel. Examples are as follows:
  • 6 bits are used to indicate the control channel duration, and the maximum is 63 OFDM symbols; 9 bits are used to indicate the total duration of the downlink transmission channel, 511 OFDM symbols, 7 bits are used to indicate the duration of the downlink transmission channel 2, 80 OFDM symbols; 9 bits are used.
  • the length of the uplink transmission channel which is 511 OFDM symbols in maximum; indicates the configuration of the downlink sounding channel with 2 bits, indicating: no downlink sounding channel, downlink sounding channel position 1, downlink sounding channel position 2, and downlink sounding channel position 3, used for matching different Sounding bandwidth (20MHz/40MHz/80MHz), downlink sounding channel positions 1, 2, 3 are system-defined locations; 2bits are used to indicate uplink sounding channel configuration, indicating 0, 1, 2, 4 OFDM symbols respectively; 2bits uplink scheduling request channel configuration, indicating 1, 2, 3, 4 OFDM symbols respectively; using lbit to indicate the uplink random access channel configuration, indicating whether there are two cases, if any, only 1 OFDM symbol; using lbit Indicates the downlink guard interval configuration. Use lbit to indicate the uplink guard interval configuration.
  • the frame structure may be jointly indicated by the system information channel and the control channel, as follows: In the system information channel, 6 bits are used to indicate the duration of the control channel, and 2 bits is used to indicate the uplink scheduling. Request channel configuration; and in the control channel, use 9bits to indicate the total duration of the downlink transmission channel, 7bits to indicate the duration of the downlink transmission channel 2, 9bits to indicate the duration of the uplink transmission channel, 2bits to indicate the downlink sounding channel configuration, and 2bits to indicate the uplink sounding channel Configure, use lbit to indicate the uplink random access channel configuration, use lbit to indicate the downlink protection interval configuration, and use lbit to indicate the uplink protection interval UGI configuration.
  • the terminal device associated with the network device can obtain the control channel duration of the frame, the downlink transmission channel duration, the downlink sounding channel configuration, the downlink transmission channel duration, the downlink protection interval configuration, and the uplink by detecting the frame structure configuration of the system information channel.
  • Detect channel configuration, uplink scheduling request channel configuration, uplink transport channel duration, uplink random access channel configuration, and uplink guard interval configuration and pass the preamble sequence duration, system information channel duration, control channel duration, downlink transport channel duration, downlink
  • the detection channel duration, the downlink transmission channel duration, the downlink protection interval duration, the uplink sounding channel duration, the uplink scheduling request channel duration, the uplink transport channel duration, the uplink random access channel duration, and the uplink guard interval duration are summed to obtain the current frame.
  • the frame is long. Or if the network device indicates the frame length of the current frame in the system information channel, the terminal device directly obtains the frame length of the current frame, and no calculation is needed.
  • the auxiliary channel and the uplink and downlink transmission channels use a time division multiplexing transmission mode.
  • the auxiliary channel and the uplink and downlink transmission channel frequency division or code division multiplexing can also be implemented, as shown in Embodiment 10 of FIG.
  • FIG. 10 is a schematic diagram of a frame structure provided by Embodiment 10 of the present invention.
  • the system information channel indicates the control channel duration, the downlink transmission channel duration, the downlink sounding channel configuration, the uplink sounding channel configuration, the uplink scheduling request channel duration, the uplink transport channel duration, and the uplink random access.
  • the control channel redistributes the frequency or codeword occupied by each channel for the uplink transmission channel, the uplink scheduling request channel, and the uplink random access channel.
  • the uplink scheduling request channel and the uplink random access channel may be combined with the uplink transmission channel for time division, frequency division, code division multiplexing, or time division, frequency division, and code division multiplexing, and specific resource allocation is indicated by the control channel, for example, 4bits indicates the number of subcarriers occupied by the uplink scheduling request channel in the uplink transport channel, and the maximum 16 subcarriers are located on the sideband edge of the uplink transport channel; 4bits is used to indicate the number of subcarriers occupied by the uplink random access channel in the uplink transport channel. , the maximum of 16 subcarriers, located at the edge of the edge of the uplink transmission channel.
  • Each terminal device associated with the network device detects the structure of the communication frame by detecting the frame structure configuration information of the system information channel, and the duration of the preamble sequence, the length of the system information channel, the duration of the control channel, the duration of the downlink transmission channel, and the downlink sounding channel.
  • the duration, the downlink transmission channel duration, the downlink guard interval duration, the uplink sounding channel duration, the uplink transport channel duration, and the uplink guard interval duration are summed to obtain the frame length of the current frame. Or if the network device indicates the frame length of the current frame in the system information channel, the terminal device directly obtains the frame length of the current frame, and no calculation is needed.
  • the system information channel and the control channel adopt a time division multiplexing mode, and the system information channel indicates the duration of the control channel.
  • the control channel capacity requirement per frame can be dynamically adjusted with the number of terminal devices that need to be scheduled.
  • FIG. 11 is a schematic diagram of a system frame structure according to Embodiment 11 of the present invention.
  • the system information channel and the control channel frequency division, code division multiplexing, or time division, frequency division, and code division combined multiplexing resources can also be implemented.
  • the resource multiplexing mode is preset, and the network device does not need to indicate.
  • Other resource allocations are indicated by the control channel.
  • the location and size of the system information channel are fixed, and the duration of the control channel is indicated by the system information channel, for example: System Information Channel and Control
  • the channel occupies a total of 10 OFDM symbols, and the system information channel occupies the fixed positions of the 10 OFDM symbols, and the control channel occupies the remaining time symbols and/or subcarrier resources.
  • Figure 11 shows the frequency division and time division of the system information channel and the control channel.
  • the system information channel and the control channel can also use only frequency division multiplexing resources.
  • the system dynamically configures communication frames, thereby implementing flexible scheduling of uplink and downlink resources of each terminal device, which is specifically implemented by the following methods:
  • Step s 1101 The network device acquires scheduling information.
  • the scheduling information includes scheduling requirements of different service flows of each terminal device or each terminal device (for example: service to be scheduled and queue length, quality of service QoS requirements for different services, service priority, etc.).
  • the step si 101 may further include: acquiring state information or quality information of a transmission channel of the network device to each terminal device (whether the network device can obtain status information or quality information of the downlink transmission channel depends on the capability of the terminal device, if the terminal device Not supported, the network device may not rely on the channel information scheduling).
  • the frame duration determination is performed by the scheduler on the network device side.
  • the scheduler obtains downlink scheduling information from the MAC or higher layer of the network device.
  • Step si 102 The scheduler of the network device completes the scheduling algorithm, and according to the downlink scheduling information, or according to the scheduling information and the status or quality information of the channel, the transmission resources are scheduled for all or part of the terminal equipment having the service requirement.
  • Each terminal device can share transmission resources by combining time division, frequency division, code division, space division or the above multiplexing manner.
  • Step S1103 The network device calculates the scheduling duration in the frame according to the transmission resource scheduled in the frame, and determines the structure of the frame.
  • Step S1104 The network device broadcasts the structure of the current frame, and sends downlink scheduling signaling.
  • the structure of the frame may be broadcast through a system information channel, or a system information channel is combined with a control channel, or other channels;
  • Downlink scheduling signaling may be sent over a control channel or other channel.
  • the step si 104 may further include the step of: broadcasting the frame length of the current frame.
  • the system information channel is used, or the system information channel is combined with the control channel, or the other channel broadcasts the structure and/or frame length of the frame.
  • the terminal device After receiving the downlink scheduling signaling sent by the network device, the terminal device checks the system information channel and the control channel, calculates the transmission resource occupied by each terminal device according to the system information and the downlink scheduling signaling, and determines the downlink transmission duration and the uplink transmission duration. And calculating the frame length of the frame;
  • step si 104 not only broadcasts the frame structure but also broadcasts the frame length, the terminal device directly obtains the frame length of the frame, and no calculation is required.
  • FIG. 12 is a schematic diagram of a frame structure of an uplink and downlink scheduling transmission process according to Embodiment 12 of the present invention.
  • a CAP is associated with 4 STAs: STA0, STA 1, STA 2, and STA 3.
  • STA0, STA 1, STA 2, and STA 3 In frame N, only STAO has downlink traffic transmission, and other STAs have neither downlink traffic transmission nor uplink traffic transmission.
  • the CAP requires STA0, STA 1, STA 2, and STA 3 to measure channel state information through the downlink sounding channel and feed back to the CAP (the TDX system uplink and downlink reciprocity is not considered here). However, if the uplink and downlink reciprocity are considered, the downlink transmission channel quality can be obtained through the uplink sounding channel, and the STA does not need to measure the channel state information through the downlink sounding channel and feed back to the CAP.
  • the CAP In order to facilitate the uplink scheduling and link adaptation of the frame N+1, the CAP requires that STA0, STA K STA 2 and STA 3 both transmit uplink sounding signals, and the auxiliary CAP measures the uplink channel quality.
  • the system statically configures the preamble sequence 1 OFDM symbol, the system information channel 1 OFDM symbol, and the other channels are indicated by the system information channel. 63 OFDM symbols are indicated for the control channel with 6 bits.
  • the CAP allocates 9 control subchannels for the control channel, and schedules STA0 downlink transmission, STA0, STA1, STA2, STA3 downlink channel state information feedback, and STA0, STA1, STA2, STA3 uplink sounding channel allocation.
  • the AP allocates 511 OFDM symbols for STA0 to transmit STA0 downlink data according to the STA0 downlink channel quality and service requirements learned by the frame N-1, and 80 OFDM symbols are located after the downlink sounding channel. Therefore, in the system information channel, the CAP uses 9 bits to indicate that the downlink transmission duration is 511 OFDM symbols. The CAP uses 2 bits to indicate that there is a downlink sounding channel and two OFDM symbols. The CAP indicates 1 OFDM symbol for DGI with 1 bit, and 1 OFDM symbol for UGI with 1 bit. Four sounding subchannels are allocated for the uplink sounding channel, and the four sounding subchannels are multiplexed by one frequency OFDM symbol.
  • a total of 16 OFDM symbols are allocated for STA0, STA 1, STA 2 and STA 3 for feedback transmission (uplink transmission;), 4 STA uplink transmission channels
  • the time division can also be divided frequently, and the specific resource scheduling is completed on the control channel.
  • the system information channel indicates 2 OFDM symbols for the uplink scheduling request channel by 2 bits, and a total of 4 scheduling request subchannels. One OFDM symbol is indicated by 1 bit for random access.
  • the frame structure is obtained by the above configuration, and the AP transmits the communication frame to STA0, STA 1, STA 2, and STA 3.
  • the STA0, the STA K STA 2, and the STA 3 can obtain the control channel duration of 63 OFDM symbols and the downlink transmission channel duration of 511 OFDM symbols after receiving the communication frame.
  • the detection channel has a length of 80 OFDM symbols;), DGI duration is 1 OFDM symbol, downlink sounding channel duration is 1 OFDM symbol, uplink sounding channel duration is 1 OFDM symbol, uplink scheduling request channel duration is 2 OFDM symbols, and uplink transmission channel duration is 16 OFDM symbols, uplink random access channel duration 1 OFDM symbol and UGI duration 1 OFDM symbol, then pass the preamble sequence channel duration 1 OFDM symbol, system information channel duration 1 OFDM symbol, control channel duration, downlink transmission The channel duration, the downlink sounding channel duration, the DGI duration, the uplink sounding channel duration, the uplink scheduling request channel duration, the uplink transmission duration, the uplink random access channel duration, and the UGI duration are summed to determine the frame N frame length, ie, 1+1. +63+511+2+1+1+
  • the frame structure configuration information of the current frame is transmitted through at least one channel of the current communication frame. Further, the frame length configuration information of the current frame may also be sent through at least one channel of the current communication frame.
  • Information indicating the allocation and scheduling of transmission resources and the transmission format of the channel occupying the transmission resources is transmitted through at least one selectively configured channel of the current communication frame.
  • Downstream traffic data, and/or downlink control signaling, and/or feedback information are transmitted over at least one selectively configured channel of the current communication frame.
  • the sequence is transmitted over at least one selectively configured channel of the current communication frame, the sequence being used for downlink channel quality and/or state measurements.
  • the sequence is received by at least one selectively configured channel of the current communication frame, the sequence being used for uplink channel quality and/or state measurements.
  • Uplink scheduling request information and/or feedback information is received over at least one selectively configured channel of the current communication frame.
  • the initial access channel information is received over at least one selectively configured channel of the current communication frame.
  • the above information transmission method is also performed, except that the specific transmission and reception are exactly opposite to the network device side.
  • the frame structure configuration information of the current frame is received through at least one channel of the current communication frame.
  • the wireless communication system of the present invention there are two kinds of communication devices such as a network device (e.g., a base station or a CAP) and a terminal device (e.g., a terminal or a STA, etc.).
  • the invention can support the network device to communicate with a plurality of terminal devices at the same time, and can support the scheduling and allocation of airspace, time domain or frequency domain resources for multiple users according to different airspace, time domain and frequency domain channel quality of different users.
  • the present invention further provides a wireless communication system having a structure as shown in FIG. 13, which includes a network device 131 (for example, a base station or a CAP) and at least one terminal device 132 (for example, a terminal or a STA), which are scheduled by the network device 131.
  • Wireless resources are allocated for different terminal devices 132.
  • the network device 131 is configured to dynamically configure a structure and a frame length of the current communication frame, and send frame structure configuration information of the current communication frame in the current communication frame.
  • the terminal device 132 is configured to determine a structure and a frame length of the current communication frame by detecting frame structure configuration information of the current communication frame.
  • the present invention further provides a network device having a structure as shown in FIG. 14, the network device comprising: a configuration unit 141 and a transmitting unit 142.
  • the configuration unit 141 is configured to dynamically configure the structure and frame length of the current communication frame.
  • the sending unit 142 is configured to send frame structure configuration information of the current communication frame in the current communication frame.
  • the current communication frame includes at least a downlink subframe
  • the downlink subframe includes at least a preamble sequence and a system information channel.
  • the transmitting unit 142 transmits the frame structure configuration information of the current communication frame on the system information channel. Further, the transmitting unit 142 also transmits the frame length configuration information of the current communication frame on the system information channel.
  • the sending unit 142 may send a part of the frame structure configuration information of the current communication frame on the system information channel, where at least the duration of the control channel is included, and another part of the current communication frame is sent on the control channel.
  • Frame structure configuration information may be sent.
  • the configuration unit 141 determines the scheduled transmission resource according to the scheduling information, and dynamically configures the structure and frame length of the current communication frame that matches the scheduled transmission resource.
  • transmitting unit 142 transmits frame structure configuration information for the current communication frame over at least one channel of the current communication frame. Further, the transmitting unit 142 also transmits the frame length configuration information of the current communication frame through at least one channel of the current communication frame.
  • the network device further includes: a communication unit that communicates with the terminal device through at least one selectively configured channel in the current communication frame.
  • the foregoing communication unit may perform one or more of the following operations: transmitting, by using at least one selectively configured channel in the current communication frame, allocation and scheduling of the transmission resource, and a transmission format of the channel occupying the transmission resource.
  • the initial access channel information is received by at least one selectively configured channel in the current communication frame.
  • the present invention further provides a terminal device having a structure as shown in FIG. 15, the terminal device comprising: a receiving unit 151 and a detecting unit 152.
  • the receiving unit 151 is configured to receive frame structure configuration information of the current communication frame.
  • the detecting unit 152 is configured to detect frame structure configuration information of the current communication frame, and learn the structure and frame length of the current communication frame.
  • the current communication frame includes at least a downlink subframe
  • the downlink subframe includes at least a preamble sequence and a system information channel
  • the receiving unit 151 receives the frame structure configuration information of the current communication frame on the system information channel. Further, the receiving unit 151 also receives the frame length configuration information of the current communication frame on the system information channel.
  • the receiving unit 151 receives, in the system information channel, frame structure configuration information of a part of the current communication frame, where at least the duration of the control channel is included, and another part of the current channel is received on the control channel.
  • Frame structure configuration information of a communication frame when the control channel is included in the downlink subframe, the receiving unit 151 receives, in the system information channel, frame structure configuration information of a part of the current communication frame, where at least the duration of the control channel is included, and another part of the current channel is received on the control channel.
  • the terminal device further includes: a calculating unit, configured to calculate a frame length of the current communication frame according to the structure of the current communication frame determined by the detecting unit 152.
  • the calculation unit is mainly used when the network device does not directly indicate the frame length.
  • receiving unit 151 also receives frame structure configuration information for the current communication frame over at least one channel of the current communication frame. Further, the receiving unit 151 further receives the frame length configuration information of the current communication frame through at least one channel of the current communication frame.
  • the terminal device further comprises: a communication unit that communicates with the network device through at least one selectively configured channel in the current communication frame.
  • the communication unit When the communication unit performs communication, it may perform one or more of the following operations: receiving, by using at least one selectively configured channel in the current communication frame, information indicating allocation and scheduling of transmission resources, and transmission format of a channel occupying transmission resources. ;
  • the initial access channel information is transmitted over at least one selectively configured channel in the current communication frame.
  • the possible structure of the current communication frame has been described in detail in the foregoing embodiments and will not be described here.
  • the communication frame structure involved may include the foregoing structures, working principles, and related operation flows in the foregoing embodiments. The process is basically the same as the foregoing wireless communication method embodiment, and is not mentioned here.
  • the system can dynamically allocate uplink and downlink radio resources based on service requirements in a medium- and short-range wireless communication system, and can dynamically adapt to future types and features. Different data business needs. At the same time, it can provide very small resource granularity, which can not only adapt to the large service rate change of different terminals, but also adapt to the dynamic changes of the wireless channel.
  • By dynamically configuring the frame length it can not only reduce the control overhead and scheduling overhead for indoor applications, but also meet the requirements of rapid outdoor changes, while reducing the complexity of implementation. In summary, it is possible to weigh the service requirements and channel characteristics, dynamically divide the uplink and downlink resources, and dynamically allocate radio resources for different terminals under the condition of link adaptation.

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Abstract

本发明公开了一种无线通信系统、一种网络设备和一种终端设备,网络设备动态配置当前通信帧的结构和帧长,并在当前通信帧中发送当前通信帧的帧结构配置信息,终端设备根据当前通信帧的帧结构配置信息,得知当前通信帧的结构和帧长。通过动态配置帧结构,针对未来丰富多样的数据业务考虑其不同的业务特征和需求,设计同时满足链路自适应与业务需求自适应的动态资源配置灵活可变的帧结构,同时可满足不同处理能力的设备对处理时间的需求。通过动态配置帧长,可降低控制开销和调度开销,并可降低实现复杂度。

Description

无线通信系统与设备
本申请要求申请日为 2011年 3月 25 日、 申请号为 2011 10074598.5、 发 明名称为 "无线通信系统中解调导频的调整方法及系统" 的中国专利申请的 优先权, 该在先申请的全部内容均已在本申请中体现。
本申请要求申请日为 2011年 3月 31 日、 申请号为 2011 10081193.4、 发 明名称为 "一种无线通信方法、 系统与设备" 的中国专利申请的优先权, 该 在先申请的全部内容均已在本申请中体现。
本申请要求申请日为 2011年 5月 19 日, 申请号为 201110130194.3, 发 明名称为 "一种通信系统" 的中国专利申请的优先权, 该在先申请的全部内 容均已在本申请中体现。
本申请要求申请日为 2012年 1月 16 日、 申请号为 201210011924.2、 发 明名称为 "无线通信方法及装置" 的中国专利申请的优先权, 该在先申请的 全部内容均已在本申请中体现。
本申请要求申请日为 2012年 2月 16 日、 申请号为 201210035552.7、 发 明名称为 "无线通信方法及装置" 的中国专利申请的优先权, 该在先申请的 全部内容均已在本申请中体现。
本申请要求申请日为 2012年 2月 21 日、 申请号为 201210041655.4、 发明 名称为 "无线通信系统及用于无线通信的装置" 的中国专利申请的优先权, 该 在先申请的全部内容均已在本申请中体现。
本申请要求申请日为 2012年 2月 21 日、 申请号为 201210041650.1、 发明 名称为 "用于无线通信的装置" 的中国专利申请的优先权, 该在先申请的全部 内容均已在本申请中体现。
本申请要求申请日为 2012年 2月 21 日、 申请号为 201210041651.6、 发明 名称为 "用于无线通信的装置" 的中国专利申请的优先权, 该在先申请的全部 内容均已在本申请中体现。 技术领域
本发明属于无线通信领域, 尤其涉及无线通信系统与设备。 背景技术
近年来, 应用于中短通信距离的无线通信系统有基于 802.11标准的无线 局域网技术 WiFi、 基于 802.15 的蓝牙 (Bluetooth ) 系统以及由移动通信系 统^"生而来的面向室内应用的 Femto技术等等。
基于 802.11 的 WiFi技术是当今使用最广的一种无线网络传输技术。 由 于 WiFi系统釆用了载波侦听 /冲突避免 (CSMA/CA, Carrier Sense Multiple Access with Collision Avoidance )机制, 系统效率较 ^ [氐,对无线资源 -浪费较 ΐ^。 导致这一问题的根本原因是 CSMA/CA机制是一种基于竟争的随机多址接入 机制, 接入点 (AP, Access Point ) 和站点 ( STA, Station ), 或者不同 STA 之间, 会通过 CSMA/CA机制竟争无线资源的使用权, 同时竟争无线信道, 此时就发生碰撞, 导致无线资源的浪费。 为了避免碰撞, 具有 CSMA/CA机 制要求 AP或 STA在竟争无线信道时需要随机退避, 在所有 AP和 STA都退 避时, 无线信道虽有空闲, 但并未被使用, 这也是对无线信道的极大浪费。 由于上述原因, 802.11 系统效率较低。 例如: 802. l lg系统物理层峰值速率可 达 54Mbps, 但传输控制十办议 (TCP, Transmission Control Protocol ) 层在大 数据包下载业务下可达速率不高于 30Mbps, 在小数据包业务下, 由于开销 比例增加, 可达峰值速率更低。 虽然存在上述缺点, 但 802.11 系统灵活, 不 依赖集中控制机制, 因此也能够实现较低的设备成本。
基于 3GPP标准的 Femto技术是从移动通信系统演进而来的一种面向室 内覆盖的新技术。 基于对 3G系统的数据统计, 大约 70%的数据业务都发生 在室内, 因此室内高速率数据接入方案就尤为重要。 Femto基站, 称为微微 基站, 体积小巧(与 Wi-Fi近似 ),部署灵活。 由于从移动通信系统演进而来, Femto基站几乎继承了移动通信系统的所有特点。 Femto设备只是结合其有 限的覆盖范围, 较少的接入用户等应用场景特征, 将设备处理能力降低, 进 而降低设备成本。 从双工方式考虑, 与移动通信系统相同, Femto基站可分 为频分双工 (FDD, Frenqucy Division Duplexing ) 与时分双工 ( TDD, Time Division Duplexing ) 两类双工机制。 FDD上下行载波资源对称, 而数据业 务上下行数据流量非对称的业务特征使得 FDD 系统面对数据业务时存在一 定的资源浪费。 TDD系统上下行链路工作在同一载波上, 通过划分时间资源 为上下行链路分配不同的无线资源, 因此较 FDD 能够更好的适配上下行业 务需求非对称的数据业务。 然而, 移动通信系统(包括 Femto系统)的 TDD 双工方式, 上下行资源静态分配, 面对需求不同的各类数据业务, 例如: 浏 览网页, 移动视频, 移动游戏, 机器对机器 (M2M, machine-to-machine ) 等, 难以实现业务需求与资源划分的动态适配。 与 Wi-Fi相比, 由于 Femto 釆用了基于调度的集中控制机制, 基站或 AP和终端之间, 或者终端之间不 存在由于竟争冲突和随机退避导致的无线资源浪费, 因此链路效率较高。
虽然 Femto系统也通过调度为上下行通信,为不同的终端分配无线资源, 但其静态配置的帧结构不能匹配上下行灵活分配的无线资源, 不能够以较小 的颗粒度自适应业务变化, 当业务与资源配置失衡时或者会造成长时排队, 用户体验降低, 或者会造成信道容量浪费。 发明内容
有鉴于此, 本发明所要解决的技术问题是提供无线通信系统及设备, 从 而实现不仅能够基于业务需求动态划分上下行无线传输资源, 还能够较好的 动态适配未来种类丰富且特征各异的数据业务需求。
为了对披露的实施例的一些方面有一个基本的理解, 下面给出了筒单的 概括。 该概括部分不是泛泛评述, 也不是要确定关键 /重要组成元素或描绘 这些实施例的保护范围。 其唯一目的是用筒单的形式呈现一些概念, 以此作 为后面的评细说明的序言。
本发明的技术方案是这样实现的:
一种无线通信系统, 包括网络设备和至少一个终端设备, 其中: 所述网络设备, 动态配置当前通信帧的结构和帧长, 在当前通信帧中发 送当前通信帧的帧结构配置信息;
所述终端设备, 通过检测当前通信帧的帧结构配置信息, 确定当前通信 帧的结构和帧长。
一种网络设备, 包括:
配置单元, 动态配置当前通信帧的结构和帧长;
发送单元, 在当前通信帧中发送当前通信帧的帧结构配置信息。
可选的, 当前通信帧中至少包括下行子帧。
可选的, 所述下行子帧中至少包括前导序列和系统信息信道。 可选的, 所述发送单元在所述系统信息信道发送当前通信帧的帧结构配 置信息。
可选的, 所述发送单元还在系统信息信道发送当前通信帧的帧长配置信 息。
可选的, 所述下行子帧中还包括如下信道中的至少一个:
下行传输信道, 用于传输下行业务、 和 /或下行控制信令、 和 /或反馈; 下行探测信道, 用于下行信道质量和 /或状态的测量与估计。
可选的, 所述下行探测信道位于所述下行传输信道的中间。
可选的, 所述当前通信帧的结构中还包括上行子帧。
可选的, 在所述下行子帧和所述上行子帧之间还具有保护间隔。
可选的, 所述上行子帧中包括如下信道中的至少一个:
上行传输信道, 用于传输上行业务、 和 /或上行信令、 和 /或反馈; 上行探测信道, 用于上行信道质量和 /或状态测量与估计;
上行调度请求信道, 用于终端设备触发上行调度请求或信令反馈; 上行随机接入信道, 用于传输上行接入信令或信令反馈。
可选的, 所述下行子帧中还包括控制信道, 用于指示传输资源的分配和 调度、 及占用传输资源的信道的传输格式。
可选的, 所述系统信息信道和所述控制信道通过时分复用、 频分复用、 码分多址中的一种方式或组合方式复用资源。
可选的, 所述发送单元在所述系统信息信道发送一部分当前通信帧的帧 结构配置信息, 其中至少包括所述控制信道的时长, 在所述控制信道发送另 一部分当前通信帧的帧结构配置信息。
可选的, 所述配置单元获取到调度信息后, 依据调度信息确定调度的传 输资源, 动态配置与调度的传输资源匹配的当前通信帧的结构和帧长。
可选的, 所述发送单元通过当前通信帧的至少一个信道发送当前通信帧 的帧结构配置信息。
可选的, 所述发送单元还通过当前通信帧的至少一个信道发送当前通信 帧的帧长配置信息。
可选的, 该设备还包括:
通信单元, 通过当前通信帧中选择性配置的信道, 与终端设备通信。 可选的, 所述通信单元执行操作时, 包括执行如下操作中的一个或多个: 通过当前通信帧中至少一个选择性配置的信道发送指示传输资源的分配 和调度、 及占用传输资源的信道的传输格式的信息;
通过当前通信帧中至少一个选择性配置的信道发送下行业务数据、 和 / 或控制信令、 和 /或反馈;
通过当前通信帧中至少一个选择性配置的信道发送序列, 该序列用于下 行信道的质量和 /或状态测量;
通过当前通信帧中至少一个选择性配置的信道接收上行业务数据、 和 / 或上行信令、 和 /或反馈信息;
通过当前通信帧中至少一个选择性配置的信道接收序列, 该序列用于上 行信道的质量和 /或状态测量;
通过当前通信帧中至少一个选择性配置的信道接收上行调度请求信息和 /或反馈信息;
通过当前通信帧中至少一个选择性配置的信道接收初始接入信道信息。 一种终端设备, 包括:
接收单元, 接收当前通信帧的帧结构配置信息; 检测单元, 通过检测当前帧的帧结构配置信息, 得知当前通信帧的结构 和帧长。
可选的, 当前通信帧中至少包括下行子帧。
可选的, 所述下行子帧中至少包括前导序列和系统信息信道。
可选的, 所述接收单元在所述系统信息信道接收当前通信帧的帧结构配 置信息。
可选的, 所述接收单元还在系统信息信道接收当前通信帧的帧长配置信 息。
可选的, 所述下行子帧中还包括如下信道中的至少一个:
下行传输信道, 用于传输下行业务、 和 /或下行控制信令、 和 /或反馈; 下行探测信道, 用于下行信道质量 /状态的测量与估计。
可选的, 所述下行探测信道位于所述下行传输信道的中间。
可选的, 所述当前通信帧的结构中还包括上行子帧。
可选的, 在所述下行子帧和所述上行子帧之间还具有保护间隔。
可选的, 所述上行子帧中包括如下信道中的至少一个:
上行传输信道, 用于传输上行业务、 和 /或上行信令、 和 /或反馈; 上行探测信道, 用于上行信道质量 /状态测量与估计;
上行调度请求信道, 用于所述终端设备触发上行调度请求或信令反馈; 上行随机接入信道, 用于传输上行接入信令或信令反馈。
可选的, 所述上行调度请求信道、 所述上行随机接入信道与所述上行传 输信道通过时分复用、 频分复用、 码分多址中的一种方式或组合方式复用资 源。
可选的, 所述下行子帧中还包括控制信道, 用于指示传输资源的分配和 调度、 及占用传输资源的信道的传输格式。
可选的, 所述接收单元在所述系统信息信道接收一部分当前通信帧的帧 结构配置信息, 其中至少包括所述控制信道的时长, 在所述控制信道接收另 一部分当前通信帧的帧结构配置信息。
可选的, 该设备还包括:
计算单元, 才艮据所述检测单元确定出的当前通信帧的结构, 计算当前通 信帧的帧长。
可选的, 所述接收单元通过当前通信帧的至少一个信道接收当前通信帧 的帧结构配置信息。
可选的, 所述接收单元还通过当前通信帧的至少一个信道接收当前通信 帧的帧长配置信息。
可选的, 该设备还包括:
通信单元, 通过当前通信帧中至少一个选择性配置的信道, 与网络设备 通信。
可选的, 所述通信单元与网络设备通信时, 执行如下操作中的一个或多 个:
通过当前通信帧中至少一个选择性配置的信道接收指示传输资源的分配 和调度、 及占用传输资源的信道的传输格式的信息;
通过当前通信帧中至少一个选择性配置的信道接收当下行业务数据、和 / 或下行控制信令、 和 /或反馈;
通过当前通信帧中至少一个选择性配置的信道接收序列, 该序列用于下 行信道的质量和 /或状态测量;
通过当前通信帧中至少一个选择性配置的信道发送上行业务数据、 上行 信令、 和 /或反馈信息;
通过当前通信帧中至少一个选择性配置的信道发送序列, 该序列用于上 行信道的质量和 /或状态测量;
通过当前通信帧中至少一个选择性配置的信道发送上行调度请求信息和 /或反馈信息;
通过当前通信帧中至少一个选择性配置的信道发送初始接入信道信息。 通过釆用本发明所提出的方案, 将可以实现以下功能:
1、 通过基站或 CAP集中调度与其关联的终端或 STA, 为不同的终端或 STA分配无线资源, 避免了竟争机制带来的无线资源浪费;
2、 可实现动态的 TDD帧长和帧结构配置, 灵活的上下行的资源比例配 置, 针对室内场景提高了系统效率、 并节省控制开销和调度开销, 基于业务 需求动态划分上下行无线资源, 能够较好的动态适配未来种类丰富且特征各 异的数据业务上下行传输需求, 没有固定的帧长或帧时长约束, 帧结构灵活 可变, 同时还降低了实现的复杂度;
3、 能够以较小的颗粒度为用户和上下行通信分配无线资源, 资源分配能 够较好的自适应业务变化, 为不同用户和上下行通信分配的无线资源能够较 好的适配业务需求与信道传输条件;
4、 不仅能够适配不同终端的较大的业务速率需求变化, 而且也能够较好 的适配无线信道的动态变化。 本发明能够更好的适配各种数据业务需求的动 态变化, 将信道容量与业务需求动态匹配, 可获得更好的系统效率。 针对不 同无线通信场景, 自适应调整帧结构, 优化系统开销。 能够权衡业务需求与 信道特征, 动态划分上下行链路资源, 在考虑链路自适应的条件下, 为不同 终端动态分配无线资源;
5、 除上述特征外, 本发明还考虑到信道状态信息反馈延迟, 不同等级设 备对处理时间的需求等。 上述考虑都能够提高系统效率和性能;
6、 可实现本帧反馈, 减少多用户多入多出 (MU-MIMO ) 的反馈延迟;
7、 可实现本帧调度, 减少了业务的调度延迟。
为了上述以及相关的目的, 一个或多个实施例包括后面将评细说明并在 权利要求中特别指出的特征。下面的说明以及附图评细说明某些示例性方面, 并且其指示的仅仅是各个实施例的原则可以利用的各种方式中的一些方式。 其它的益处和新颖性特征将随着下面的详细说明结合附图考虑而变得明显, 所公开的实施例是要包括所有这些方面以及它们的等同。 附图说明
图 1是本发明实施例一提供的帧结构的示意图;
图 2是本发明实施例二提供的帧结构的示意图;
图 3是本发明实施例三提供的帧结构的示意图;
图 4是本发明实施例四提供的帧结构的示意图;
图 5是本发明实施例五提供的帧结构的示意图;
图 6是本发明实施例六提供的帧结构的示意图;
图 7是本发明实施例七提供的帧结构的示意图;
图 8是本发明实施例八提供的上下行收发保护间隔设置的示意图; 图 9是本发明实施例九提供的帧结构的示意图;
图 10是本发明实施例十提供的帧结构的示意图;
图 11是本发明实施例十一提供的帧结构的示意图;
图 12 是本发明实施例十二提供的上下行调度传输过程的帧结构的示意 图;
图 13是本发明提供的无线通信系统的结构示意图;
图 14是本发明提供的网络设备的结构示意图;
图 15是本发明提供的终端设备的结构示意图。 具体实施方式
以下描述和附图充分地示出本发明的具体实施方案, 以使本领域的技术 人员能够实践它们。 其他实施方案可以包括结构的、 逻辑的、 电气的、 过程 的以及其他的改变。 实施例仅代表可能的变化。 除非明确要求, 否则单独的 组件和功能是可选的, 并且操作的顺序可以变化。 一些实施方案的部分和特 征可以被包括在或替换其他实施方案的部分和特征。 本发明的实施方案的范 围包括权利要求书的整个范围, 以及权利要求书的所有可获得的等同物。 在 本文中, 本发明的这些实施方案可以被单独地或总地用术语 "发明" 来表示, 这仅仅是为了方便, 并且如果事实上公开了超过一个的发明, 不是要自动地 限制该应用的范围为任何单个发明或发明构思。
本发明的核心在于: 网络设备动态配置当前通信帧的结构和帧长, 并在 当前通信帧中发送当前通信帧的帧结构配置信息, 终端设备通过检测帧结构 配置信息, 得知当前通信帧的结构和帧长。
上述结构的含义包括: 通信帧中各信道的有无及时长。
釆用本发明, 可避免竟争冲突或者随机退避导致的无线资源浪费。 与传 统移动通信系统 (包括: LTE, WiMax 等下一代移动通信系统) 不同, 本发 明通过动态配置帧结构, 使得帧结构灵活可变, 能够实现基于业务需求动态 划分上下行无线资源, 能够较好的动态适配未来种类丰富且特征各异的数据 业务上下行传输需求。 同时, 该系统能够提供甚小的资源颗粒度, 不仅能够 适配不同终端设备的较大的业务速率需求变化, 而且也能够较好的适配无线 信道的动态变化。 本发明通过动态配置帧长, 不仅能针对室内应用降低控制 开销和调度开销, 也能满足室外快速变化的要求, 同时还能降低实现的复杂 度。 概括言之, 本发明能够权衡业务需求与信道特征, 动态划分上下行链路 资源, 在考虑链路自适应的条件下, 为不同终端设备动态分配无线资源。
本发明中提到的网络设备不仅仅局限于 CAP, 也可能是基站或其他网络 设备, 终端设备也不仅仅局限于 STA, 也可能是终端或其他终端设备。
本发明中的通信帧是以 TDD 双工方式 (在某一固定载波上, 网络设备 与终端设备通过收发转换分时完成接收与发射) 为基础, 每个通信帧包括下 行(DL, Downlink, 从网络设备到终端设备方向)传输与上行( UL, Uplink, 从终端设备到网络设备方向 ) 传输两个部分, 但下行传输与上行传输的时长 可动态配置, 进而每个通信帧的帧长也可动态变化。 网络设备可以通过如下 两种方法指示每个通信帧的结构, 或结构和帧长。
第一种方法: 通过系统信息信道指示帧结构。
网络设备通过系统信息信道传输当前帧的系统基本配置信息和帧结构配 置信息。
上述系统基本配置信息包括频带配置、 天线配置、 帧编号等。
上述帧结构配置信息可以包括如下几种: 本帧内各信道或者部分信道的 时长; 本帧内各信道或者部分信道的配置。 其中信道的时长可以用多比特 ( bit ) 实现, 当信道的时长为零时, 隐含指示通信帧中不包含该信道。 信道 的配置包括信道的存在性、 位置、 和存在性及时长中的一种或多种。 其中信 道的存在性可以用 lbit实现, 指示信道的有无, 可以用于一些时长固定的信 道, 当指示通信帧中有某信道时, 间接获知该信道的时长为固定时长; 信道 的存在性及时长可以用多 bit实现, 既指示信道的有无、 也指示信道的时长, 可以用于一些时长非固定的信道。
举一个具体的例子, 本发明的帧结构配置信息中可以包括: 控制信道时 长、 下行传输信道时长、 下行探测信道配置、 上行探测信道配置、 上行调度 请求信道配置、 上行传输信道时长和上行随机接入信道配置。
与网络设备关联的所有终端设备, 通过检测系统信息信道获得帧结构配 置信息, 从而确定本帧结构, 进一步可以 艮据本帧结构计算本帧的帧长, 例 如将本帧结构中各个部分的时长相力口。
可选的, 网络设备还可以在系统信息信道发送帧长配置信息, 与网络设 备关联的所有终端设备, 通过检测系统信息信道获得帧长配置信息, 直接获 得本帧的帧长, 不需要计算。
第二种方法: 通过系统信息信道和控制信道联合指示帧结构。
网络设备通过系统信息信道和控制信道联合传输当前帧的帧结构配置信 息。
与网络设备关联的所有终端设备, 通过检测系统信息信道和控制信道获 得帧结构配置信息, 从而确定本帧结构, 进一步可以根据本帧结构计算本帧 的帧长。
可选的, 网络设备还可以通过系统信息信道发送帧长配置信息, 或者通 过系统信息信道和控制信道联合发送帧长指示信息, 与网络设备关联的所有 终端设备通过帧长配置信息, 可以直接确定本帧的帧长。
下面分别以几个实施例为例具体说明不同配置的帧结构。
每个帧至少包括下行子帧, 还可能包括上行子帧, 将下行子帧和上行子 帧按照功能划分不同的信道, 并且各信道按照功能划分不同的字段。 在下行 子帧和上行子帧之间具有保护间隔, 用于网络设备与终端设备完成收发双工 转换及其它功能。
实施例一
图 1是本发明实施例一提供的帧结构的示意图。
如图 1所示, 横坐标表示时间, 纵坐标表示频率, 该帧只包括下行子帧 和保护间隔。 下行子帧中至少包括前导序列和系统信息信道。 前导序列和系 统信息信道的时长为预先设定, 无需网络设备在帧结构指示信息中指示, 因 此本实施例中的帧结构指示信息, 指示的是除前导序列和系统信息信道之外 的通信帧中其他信道的有无及配置。
前导序列 (Preamble ), 可以划分为短训练序列和长训练序列。 其中, 短 训练序列用于帧检测、 自动增益控制、 粗频率同步或粗符号同步, 长训练序 列用于精频率同步、 精符号同步或信道估计等。
系统信息信道, 用于发送系统基本配置信息和帧结构配置信息。 系统信 息信道还可以进一步用于发送帧长配置信息。
网络设备在系统信息信道广播帧结构配置信息。
与网络设备关联的所有终端设备, 通过帧结构配置信息, 可以确定当前 通信帧中只包括前导序列和系统信息信道。
在网络设备发送帧长配置信息时, 与网络设备关联的所有终端设备直接 得知当前通信帧的帧长, 在网络设备未发送帧长配置信息时, 与网络设备关 联的所有终端设备根据当前通信帧的结构计算出当前通信帧的帧长。 实施例二 图 2是本发明实施例二提供的帧结构的示意图。
如图 2所示, 在图 1的基础上下行子帧还可能包括控制信道和下行传输 信道。
控制信道, 用于发送传输资源的分配和调度、 及占用传输资源的信道的 传输格式。 具体的, 根据应用场景, 控制信道可以指示下行传输信道、 下行 探测信道、 上行传输信道、 上行探测信道、 上行调度请求信道和上行随机接 入信道中的一个或几个的传输资源的分配和调度、 及这些信道的传输格式。
下行传输信道, 用于网络设备向终端设备传输下行业务、 和 /或下行控制 信令、 和 /或反馈信息。 这里的反馈可以指针对上行业务进行的反馈。
在下行传输信道进行下行业务调度传输、 和 /或下行信令调度传输、 和 / 或反馈传输。
各终端设备可通过时分, 频分, 码分、 空分或者上述复用方式的结合共 享下行传输资源。
实施例三
图 3是本发明实施例三提供的帧结构的示意图。
如图 3所示, 在图 2的基础上还可能包括上行子帧, 上行子帧包括上行 传输信道。
上行传输信道用于终端设备向网络设备传输上行业务数据、和 /或上行信 令、 和 /或反馈信息。 这里的反馈可以包括针对下行业务的反馈, 还可以包括 对下行的信道质量信息 (CQI ) 和 /或下行的信道状态信息 (CSI ) 的反馈。
在上行传输信道进行上行业务调度传输、 和 /或上行信令调度传输、 和 / 或上行反馈调度传输。
各终端设备可通过时分, 频分, 码分、 空分或者上述复用方式的结合共 享上行传输资源。
具体地, 在帧结构中, 可以通过在系统信息信道中用比特 ( bit )位指示 帧结构。 举例 ¾口下:
在系统信息信道中, 用 6bits指示控制信道时长, 该 6bits最大可指示 63 个 OFDM符号, 资源最小分配单位: 1个 OFDM符号。 例如: 如果这 6bits 是 010000, 转换为十进制数是 16, 对应 16个 OFDM符号。
在系统信息信道中,用 9bits指示下行传输信道时长,最大 511个 OFDM 符号。 例如: 如果这 9bit是 100000000, 转换为十进制数是 256, 对应 256 个 OFDM符号。
在系统信息信道中,用 9bits指示上行传输信道时长,最大 511个 OFDM 符号。
在系统信息信道中, 可以用 lbit指示保护间隔, 共 1个 OFDM符号。 或 者系统信息信道不指示保护间隔, 而是系统已配置好。
控制信道指示下行传输信道或上行传输信道资源分配的方法举例如下: 在控制信道, 分别用 Nbit指示某个 STA在下行传输信道的起始位置, 再用 Nbit指示该 STA在该位置后连续多少个 bit是为其分配的资源。 例如: N=9, 控制信道对 STA指示起始位置, 000010000, 转换为十进制数是 16, 表示该 STA起始位置是第 16个 OFDM符号。 资源长度为 000100000, 转换 为十进制数是 32, 表示该符号后 (包括该符号), 连续 32个符号都分配给该 STA。 在控制信道, 分别用 Mbit指示某个 STA在上行传输信道的起始位置, 再用 Mbit指示该 STA在该位置后连续多少个 bit是为其分配的资源。
还可以通过系统信息信道与控制信道共同指示帧结构, 举例如下: 在系统信息信道中, 用 6bits指示控制信道时长; 在控制信道中, 用 9bits指示下行传输信道时长, 用 9bits指示上行传输 信道时长。
基于图 3的实施例三, 可在上下行传输中将信令与业务分离, 设置各控 制信道或传输信道, 并在系统信息信道中指示控制信道的时长以及上下行传 输信道的时长。 网络设备通过系统信息信道告知与其关联的终端设备控制信 道时长、 上下行传输信道时长和保护间隔设置。 各与网络设备关联的终端设 备通过检测系统信息信道的帧结构配置信息, 可获得控制信道时长、 下行传 输信道时长和上行传输信道时长。通过对前导序列时长、 系统信息信道时长、 控制信道时长、 下行传输信道时长、 保护间隔时长和上行传输信道时长进行 求和运算, 确定本帧的帧长。 或者如果网络设备在系统信息信道中指示了本 帧的帧长, 则终端设备直接获得帧长, 不需要计算。
实施例四
图 4是本发明实施例四提供的帧结构的示意图。
如图 4所示, 在图 3的基础上, 在下行子帧设置了下行探测信道, 下行 探测信道用于下行信道质量和 /或状态测量与估计。如果下行探测信道的时长 配置, 则在系统信息信道中用 lbit指示下行探测信道的有无。 如图 4所示, 下行探测信道位于下行传输信道的后面。
实施例五
图 5是本发明实施例五提供的帧结构的示意图, 下行探测信道位于下行 传输信道的中间。
在 MU-MIMO传输方案中, 由于下行 MU-MIMO 系统性能不仅对下行 信道状态信息延迟敏感, 而且多用户 MIMO会涉及较大的信号处理复杂度。 综合考虑信道状态信息延迟, 以及不同应用场景下可能不同的硬件处理复杂 度, 下行探测信道位于下行传输信道的中间更为合理。 如果下行探测信道位 置固定, 可用在系统信息信道中用 lbit指示下行探测信道有无。 如果系统中 存在不同处理能力的终端或 STA, 下行探测信道位置可变。 此时, 在系统信 息信道中不仅需要指示下行探测信道的有无, 还需要指示图 5中两个下行传 输信道时长。 两个下行传输信道时长指示可釆用如下三种方法:
分别指示下行传输信道一和下行传输信道二的时长;
分别指示下行传输信道总时长和下行传输信道一的时长;
分别指示下行传输信道总时长和下行传输信道二的时长。
通过上述动态或半静态设置下行探测信道位置, 为不同处理能力的设备 提供足够的处理时间。
具体地, 在帧结构中, 可以通过在系统信息信道中用 bit位指示帧结构。 举例如下:
在系统信息信道中, 用 6bit指示控制信道时长, 最大 63个 OFDM符号; 用 9bits指示下行传输信道总时长, 511个 OFDM符号, 用 7bits指示下行传 输信道二的时长, 80个 OFDM符号; 用 9bits指示上行传输信道时长, 最大 511 个 OFDM符号; 用 2bits指示下行探测信道配置, 分别指示: 无下行探 测信道、 下行探测信道位置 1、 下行探测信道位置 2和下行探测信道位置 3, 用于匹配不同的 Sounding带宽。 下行探测信道位置 1、 2、 3均是系统定义的 确定位置; 用 2bits指示上行探测信道配置, 分别指示 0、 1、 2、 4个 OFDM 符号; 用 2bits指示上行调度请求信道配置, 分别指示 1、 2、 3、 4个 OFDM 符号; 用 lbit指示上行随机接入信道配置, 分别指示有和无两种情况, 若有, 仅 1个 OFDM符号。
或者可以通过系统信息信道与控制信道共同指示帧结构, 举例如下: 在系统信息信道, 用 6bits指示控制信道时长; 并且在控制信道, 用 9bits 指示下行传输信道总时长, 用 7bits指示下行传输信道二的时长, 用 9bits指 示上行传输信道时长, 用 2bits指示下行探测信道配置。
各与网络设备关联的终端设备通过检测系统系统信息信道的帧结构配 置, 可获得控制信道时长、 下行传输信道一时长、 下行探测信道时长、 下行 传输信道二时长、 保护间隔时长, 并且通过对前导序列时长、 系统信息信道 时长、 控制信道时长、 下行传输信道一时长、 下行探测信道时长、 下行传输 信道二时长、 保护间隔时长、 上行传输信道时长进行求和运算, 得到本帧的 帧长。 或者如果网络设备在系统信息信道中指示了本帧的帧长, 则终端设备 直接获得本帧的帧长。
实施例六
图 6是本发明实施例六提供的帧结构的示意图。
在上行子帧中可以设置一些辅助信道, 例如: 在上行子帧设置了上行探 测信道、 上行调度请求信道或上行随机接入信道中的一个或多个。 其中, 上 行探测信道用于上行信道的质量和 /或状态测量与估计; 上行调度请求信道用 于终端设备触发上行调度请求或上行快速反馈; 上行随机接入信道用于终端 设备初始接入, 或终端设备调度请求。 在系统信息信道中可分别指示上行探 测信道、 上行调度请求信道以及上行随机接入信道的配置。 如果上述辅助信 道具有固定的物理层信道格式 (例如: 占用 1 或几个符号时长), 系统信息 信道中只需用 lbit分别指示其中的某一个信道的配置, 例如: 上行随机接入 信道, 在系统信息信道中用 lbit指示, 若该 bit位为 0时, 说明没有配置上 行随机接入信道, 若该 bit位为 1 时, 说明配置了上行随机接入信道, 仅指 示 1个 OFDM符号。 如果上述辅助信道不具有固定的物理层信道格式, 则可 以使用 2bits指示其配置, 例如: 上行探测信道, 在系统信息信道中用 2bits 指示, 若取值为 00, 说明没有配置上行探测信道, 即上行探测信道为 0 个 OFDM符号, 若取值为 01, 说明上行探测信道为 1个 OFDM符号, 若取值 为 10, 说明上行探测信道为 2个 OFDM符号, 若取值为 11, 说明上行探测 信道为 4个 OFDM符号。
图 6仅仅是一个三种辅助信道都包括的帧结构举例, 在实际情况中, 依 据系统应用场景或方案的不同, 某些辅助信道也可不予考虑。
具体地, 在帧结构中, 可以通过在系统信息信道中用 bit位指示帧结构。 举例如下:
在系统信息信道中, 用 6bit指示控制信道时长, 最大 63个 OFDM符号; 用 9bits指示下行传输信道时长, 最大 511个 OFDM符号; 用 9bits指示上行 传输信道时长, 最大 511个 OFDM符号; 用 2bits指示上行探测信道配置, 分别指示 0、 1、 2、 4个 OFDM符号; 用 2bits指示上行调度请求信道配置, 分别指示 1、 2、 3、 4个 OFDM符号; 用 lbit指示上行随机接入信道配置, 分别指示有和无两种情况, 在有上行随机接入信道时, 固定为 1个 OFDM符 号。
或者可以通过系统信息信道与控制信道共同指示帧结构, 举例如下: 在系统信息信道中, 用 6bits指示控制信道时长, 用 lbit指示上行随机接 入信道配置; 并且在控制信道中, 用 9bits指示下行传输信道时长, 用 9bits 指示上行传输信道时长, 用 2bits指示上行探测信道配置, 用 2bits指示上行 调度请求信道配置。
各与网络设备关联的终端设备通过系统信息信道广播的帧结构配置, 可 获得控制信道时长、 下行传输信道时长、 上行传输信道时长、 上行探测信道 配置、 上行调度请求信道配置和上行随机接入信道配置, 并且通过对前导序 列时长、 系统信息信道时长、 控制信道时长、 下行传输信道时长、 保护间隔 时长、 上行探测信道时长、 上行调度请求信道时长、 上行传输信道时长以及 上行随机接入信道时长进行求和运算, 得到本帧的帧长。 或者如果网络设备 在系统信息信道中指示了本帧的帧长, 则终端设备直接获得本帧的帧长, 不 需要计算。
实施例七
图 7是本发明实施例七提供的帧结构的示意图。
如图 7所示, 是在下行子帧中设置了下行探测信道, 并且同时也在上行 子帧中设置了上行探测信道、上行调度请求信道和上行随机接入信道的举例。 但在实际情况中, 依据系统应用场景或方案的不同, 某些辅助信道也可不予 考虑。
实施例八
图 8是本发明实施例八提供的上下行收发保护间隔设置的示意图。
本发明需要为网络设备和终端设备预留收发转换时间。 例如: 网络设备 和终端设备从 DL到 UL转换时, 其射频通道就由发射或接收转换为接收或 发射状态; 网络设备和终端设备从 UL到 DL转换时, 其射频通道就由接收 或发射转换为发射或接收状态。 在图 1至图 6所示的实施例一至六中, 仅保 留了 DL至 UL转换的保护间隔,而 UL至 DL转换的保护间隔是通过基站或 CAP通过发射提前预留的, 即: 将上行传输时间提前, 为网络设备和终端设 备预留 UL至 DL转换的保护间隔, 具体如图 8所示, 当然此时图 1至图 7 中所示下行至上行保护间隔 GI应不小于网络设备与终端设备的最大 DL至 UL与 UL至 DL的保护时间之和。
除了图 8所示的设置方法 (移动通信系统通用的定时提前方法) 外, 也 可考虑图 9所示方案, 分别设置保护间隔。
实施例九
图 9是本发明实施例九提供的系统帧结构的示意图。
在实施例九中, 可以在系统信息信道中为上行至下行和下行至上行分别 设置各自的保护间隔下行保护间隔 ( DGI ) 和上行保护间隔 ( UGI ), 所述下 行保护间隔为下行至上行收发保护间隔, 所述上行保护间隔为上行至下行收 发保护间隔。
具体地, 在帧结构中, 可以通过在系统信息信道中用 bit位指示帧结构。 举例如下:
在系统信息信道中, 用 6bit指示控制信道时长, 最大 63个 OFDM符号; 用 9bits指示下行传输信道总时长, 511个 OFDM符号, 用 7bits指示下行传 输信道二的时长, 80个 OFDM符号; 用 9bits指示上行传输信道时长, 最大 511 个 OFDM符号; 用 2bits指示下行探测信道配置, 分别指示: 无下行探 测信道、 下行探测信道位置 1、 下行探测信道位置 2和下行探测信道位置 3, 用于匹配不同的 Sounding 带宽 ( 20MHz/40MHz/80MHz ), 下行探测信道位 置 1、 2、 3均是系统定义的确定位置; 用 2bits指示上行探测信道配置, 分别 指示 0、 1、 2、 4个 OFDM符号; 用 2bits上行调度请求信道配置, 分别指示 1、 2、 3、 4个 OFDM符号; 用 lbit指示上行随机接入信道配置, 分别指示 有和无两种情况,若有,仅 1个 OFDM符号;用 lbit指示下行保护间隔配置; 用 lbit指示上行保护间隔配置。
或者可以通过系统信息信道与控制信道共同指示帧结构, 举例如下: 在系统信息信道中, 用 6bits指示控制信道时长, 用 2bits指示上行调度 请求信道配置; 并且在控制信道, 用 9bits指示下行传输信道总时长, 用 7bits 指示下行传输信道二的时长, 用 9bits指示上行传输信道时长, 用 2bits指示 下行探测信道配置, 用 2bits指示上行探测信道配置, 用 lbit指示上行随机 接入信道配置, 用 lbit 指示下行保护间隔配置, 用 lbit指示上行保护间隔 UGI配置。
各与网络设备关联的终端设备通过检测系统信息信道的帧结构配置, 可 获得本帧的控制信道时长、 下行传输信道一时长、 下行探测信道配置、 下行 传输信道二时长、 下行保护间隔配置、 上行探测信道配置、 上行调度请求信 道配置、上行传输信道时长、上行随机接入信道配置以及上行保护间隔配置, 并且通过对前导序列时长、 系统信息信道时长、 控制信道时长、 下行传输信 道一时长、 下行探测信道时长、 下行传输信道一时长、 下行保护间隔时长、 上行探测信道时长、 上行调度请求信道时长、 上行传输信道时长、 上行随机 接入信道时长以及上行保护间隔时长进行求和运算, 得到本帧的帧长。 或者 如果网络设备在系统信息信道中指示了本帧的帧长, 则终端设备直接获得本 帧的帧长, 不需要计算。
在上述实施例一至九中, 辅助信道与上下行传输信道釆用了时分复用的 传输方式。 依据场景要求, 也可实现辅助信道与上下行传输信道频分或码分 复用, 如图 10所示的实施例十。
实施例十
图 10是本发明实施例十提供的帧结构的示意图。
在实施例十中, 如图 10所示, 系统信息信道指示控制信道时长、 下行传 输信道时长、 下行探测信道配置、 上行探测信道配置、 上行调度请求信道时 长、 上行传输信道时长、 上行随机接入信道配置、 下行保护间隔配置和上行 保护间隔配置。 控制信道为上行传输信道、 上行调度请求信道和上行随机接 入信道再分配各信道占用的频率或码字。
上行调度请求信道和上行随机接入信道可以与上行传输信道实现时分、 频分、 码分复用或者时分、 频分、 码分组合复用, 而具体的资源分配由控制 信道予以指示,例如用 4bits指示上行调度请求信道在上行传输信道中占用的 子载波个数, 最大 16个子载波, 位于上行传输信道上边带边缘; 用 4bits指 示上行随机接入信道在上行传输信道中占用的子载波个数, 最大 16 个子载 波, 位于上行传输信道下边带边缘。
各个与网络设备关联的终端设备通过检测系统信息信道的帧结构配置信 息, 得知通信帧的结构, 通过对前导序列时长、 系统信息信道时长、 控制信 道时长、 下行传输信道一时长、 下行探测信道时长、 下行传输信道二时长、 下行保护间隔时长、 上行探测信道时长、 上行传输信道时长和上行保护间隔 时长进行求和运算, 得到本帧的帧长。 或者如果网络设备在系统信息信道中 指示了本帧的帧长, 则终端设备直接获得本帧的帧长, 不需要计算。
实施例一至十中, 系统信息信道与控制信道釆用时分复用方式, 并由系 统信息信道指示控制信道时长。 每帧内控制信道容量需求可随需要调度的终 端设备的数量动态调整。
实施例十一
图 11是本发明实施例十一提供的系统帧结构的示意图。
如图 11所示, 也可实现系统信息信道与控制信道频分、码分复用或者时 分、 频分、 码分组合复用资源, 这种资源复用方式为预先设定, 网络设备无 需指示, 其他的资源分配由控制信道予以指示。 系统信息信道的位置和大小 是固定的, 控制信道时长由系统信息信道指示, 例如: 系统信息信道与控制 信道一共占用 10个 OFDM符号, 系统信息信道占用所述 10个 OFDM符号 固定位置, 控制信道占用其余时间符号和 /或子载波资源。
图 11给出的是系统信息信道和控制信道频分和时分混用的情况,实际应 用中, 系统信息信道和控制信道也可以只通过频分复用资源。
本发明中系统动态配置通信帧, 从而实现灵活地对各终端设备的上下行 资源调度, 具体是通过以下方法实现的:
步骤 s 1101: 网络设备获取调度信息。
其中, 调度信息包括各终端设备或各终端设备的不同业务流的调度需求 (例如: 待调度的业务和队列长度、 不同业务的服务质量 QoS需求、 业务优 先级等等)。
其中, 步骤 si 101还可能包括: 获取网络设备至各终端设备的传输信道 的状态信息或质量信息 (网络设备能否获得下行传输信道的状态信息或质量 信息取决于终端设备的能力, 若终端设备不支持, 网络设备可不依赖该信道 信息调度)。
在下行调度传输中, 帧时长确定由网络设备侧的调度器完成。 调度器从 网络设备的 MAC或高层获得下行调度信息。
步骤 si 102: 网络设备的调度器完成调度算法, 根据下行调度信息, 或 根据调度信息和信道的状态或质量信息, 为全部或部分有业务需求的终端设 备调度传输资源。
各终端设备可通过时分, 频分, 码分、 空分或者上述复用方式的结合共 享传输资源。
步骤 S1103 : 网络设备根据本帧内调度的传输资源计算本帧内调度时长, 确定本帧的结构;
确定本帧的结构之后还可能包括步骤: 计算本帧的帧长。
步骤 S1104: 网络设备广播本帧的结构, 并发送下行调度信令。
其中, 可以通过系统信息信道, 或者系统信息信道与控制信道结合, 或 者其他信道广播本帧的结构;
可以通过控制信道或其他信道发送下行调度信令。
其中, 步骤 si 104还可能包括步骤: 广播本帧的帧长。
此时, 通过系统信息信道, 或者系统信息信道与控制信道结合, 或者其 他信道广播本帧的结构和 /或帧长。
通过上述过程, 实现了对帧结构的动态配置。
当终端设备接收到网络设备发送的下行调度信令后, 检查系统信息信道 和控制信道, 根据系统信息和下行调度信令, 计算获得各终端设备占用的传 输资源, 确定下行传输时长、 上行传输时长并计算本帧的帧长;
如果步骤 si 104不但广播本帧的结构还广播了帧长, 则终端设备直接获 得本帧的帧长, 不需要计算。
下面通过具体描述一个实施例十二来详细说明系统如何通过动态配置帧 结构, 从而实现灵活地对各终端设备的上下行资源调度。
实施例十二
图 12 是本发明实施例十二提供的上下行调度传输过程的帧结构的示意 图。
在实施例十二中, 基于前述实施例一至十一提供的帧结构方案, 考虑 MIMO-OFDM传输机制, 系统工作过程举例如下:
某个 CAP关联有 4个 STA: STA0、 STA 1、 STA 2和 STA 3。 在帧 N, 仅有 STAO有下行业务传输,其它 STA既无下行业务传输又无上行业务传输。 为了便于帧 N+1完成下行调度和链路自适应, CAP要求 STA0、 STA 1、 STA 2和 STA 3通过下行探测信道测量信道状态信息并反馈给 CAP (这里没有考 虑 TDD 系统上下行互易性, 但是如果考虑上下行互易的话, 通过上行探测 信道可得到下行传输信道质量, 而不需要 STA通过下行探测信道测量信道状 态信息并反馈给 CAP )。 为了便于帧 N+ 1完成上行调度和链路自适应, CAP 要求 STA0、 STA K STA 2和 STA 3均发射上行探测信号, 辅助 CAP测量上 行信道质量。 系统静态配置前导序列 1 个 OFDM符号, 系统信息信道 1 个 OFDM符号, 其它信道均由系统信息信道指示。 用 6bits为控制信道指示 63 个 OFDM符号。 基于上述需求, 在帧 N, CAP为控制信道分配 9个控制子 信道, 分别调度 STA0下行传输, STA0、 STA1、 STA2、 STA3下行信道状态 信息反馈和 STA0、 STA1、 STA2、 STA3上行探测信道分配。 AP依据帧 N-1 获知的 STA0下行信道质量和业务需求, 为 STA0分配了 511个 OFDM符号 用于传输 STA0下行数据, 其中有 80个 OFDM符号位于下行探测信道之后。 因此,在系统信息信道, CAP用 9bits指示下行传输时长为 511个 OFDM符 号。 CAP用 2bits指示有下行探测信道, 2个 OFDM符号。 CAP用 lbit为 DGI指示 1个 OFDM符号, 用 lbit为 UGI指示 1个 OFDM符号。 为上行探 测信道分配了 4 个探测子信道, 这 4 个探测子信道通过频分方式复用一个 OFDM符号。 考虑到 STA0、 STA K STA 2和 STA 3的反馈需求, 为 STA0、 STA 1、 STA 2和 STA 3共分配了 16个 OFDM符号用于反馈传输(上行传输;), 4个 STA上行传输信道之间可以时分也可以频分, 具体资源调度在控制信道 完成。 系统信息信道用 2bits为上行调度请求信道指示了 2个 OFDM符号, 共计 4个调度请求子信道。 用 lbit为随机接入指示了 1个 OFDM符号。 由上 述配置得到帧结构, AP将该通信帧发送给 STA0、 STA 1、 STA 2和 STA 3。
基于实施例八, STA0、 STA K STA 2, STA 3收到通信帧后, 通过检测 系统信息信道的广播信息, 可获得控制信道时长 63个 OFDM符号、 下行传 输信道时长 511个 OFDM符号(其中下行探测信道时长二 80个 OFDM符号;)、 DGI时长 1个 OFDM符号、 下行探测信道时长 1个 OFDM符号、 上行探测 信道时长 1个 OFDM符号、 上行调度请求信道时长 2个 OFDM符号、 上行 传输信道时长 16个 OFDM符号、上行随机接入信道时长 1个 OFDM符号和 UGI时长 1个 OFDM符号,然后通过对前导序列信道时长 1个 OFDM符号、 系统信息信道时长 1个 OFDM符号、 控制信道时长、 下行传输信道时长、 下 行探测信道时长、 DGI时长、 上行探测信道时长、 上行调度请求信道时长、 上行传输时长、 上行随机接入信道时长和 UGI时长进行求和运算, 确定帧 N 帧长, 即 1+1+63+511+2+1+1+2+16+1+1= 600个 OFDM符号。
以上实施例一至十二仅为优选实施例, 但是本发明不仅仅局限于通过前 面所提到的信道实现本发明, 通过以下信息传输方法来实现本发明的技术方 案也在本发明的保护范围之内。 以网络设备侧为例, 具体如下:
通过当前通信帧的至少一个信道发送当前帧的帧结构配置信息。进一步, 还可以通过当前通信帧的至少一个信道发送当前帧的帧长配置信息。
通过当前通信帧的至少一个选择性配置的信道发送指示传输资源的分配 和调度、 及占用传输资源的信道的传输格式的信息。
通过当前通信帧的至少一个选择性配置的信道发送下行业务数据、 和 / 或下行控制信令、 和 /或反馈信息。
通过当前通信帧的至少一个选择性配置的信道发送序列, 该序列用于下 行信道质量和 /或状态测量。
通过当前通信帧的至少一个选择性配置的信道接收上行业务数据、 和 / 或上行信令、 和 /或反馈信息。
通过当前通信帧的至少一个选择性配置的信道接收序列, 该序列用于上 行信道质量和 /或状态测量。
通过当前通信帧的至少一个选择性配置的信道接收上行调度请求信息和 /或反馈信息。
通过当前通信帧的至少一个选择性配置的信道接收初始接入信道信息。 在终端设备侧时, 也执行以上信息传输方法, 只是具体的发送和接收与 网络设备侧正好相反。 例如, 通过当前通信帧的至少一个信道接收当前帧的 帧结构配置信息。
在本发明无线通信系统中, 存在网络设备(例如基站或 CAP等)和终端 设备(例如终端或 STA等 )这两种通信设备。 本发明可以支持网络设备同时 和多个终端设备的通信, 可以支持根据不同用户的空域、 时域、 频域信道质 量的区别, 对多用户进行空域、 时域或频域资源的调度和分配。
本发明还提供一种无线通信系统, 结构如图 13所示, 该系统包括网络设 备 131 (例如: 基站或 CAP )和至少一个终端设备 132 (例如: 终端或 STA ), 通过网络设备 131调度, 为不同的终端设备 132分配无线资源。
网络设备 131, 用于动态配置当前通信帧的结构和帧长, 在当前通信帧 中发送当前通信帧的帧结构配置信息。
终端设备 132, 用于通过检测当前通信帧的帧结构配置信息, 确定当前 通信帧的结构和帧长。
本发明还提供一种网络设备, 结构如图 14所示, 该网络设备包括: 配置 单元 141和发送单元 142。
配置单元 141, 用于动态配置当前通信帧的结构和帧长。
发送单元 142, 用于在当前通信帧中发送当前通信帧的帧结构配置信息。 在一种实施例中, 当前通信帧中至少包括下行子帧, 下行子帧中至少包 括前导序列和系统信息信道。 发送单元 142在系统信息信道发送当前通信帧 的帧结构配置信息。 进一步, 发送单元 142还在系统信息信道发送当前通信 帧的帧长配置信息。
进一步, 当下行子帧中还包括控制信道时, 发送单元 142可以在系统信 息信道发送一部分当前通信帧的帧结构配置信息, 其中至少包括控制信道的 时长, 在控制信道发送另一部分当前通信帧的帧结构配置信息。
在一种实施例中, 配置单元 141获取到调度信息后, 依据调度信息确定 调度的传输资源, 动态配置与调度的传输资源匹配的当前通信帧的结构和帧 长。
配置单元 141可能配置的各种通信帧的具体结构, 在前文实施例中已有 许细描述, 这里不再赘述。
在一种实施例中, 发送单元 142通过当前通信帧的至少一个信道发送当 前通信帧的帧结构配置信息。 进一步, 发送单元 142还通过当前通信帧的至 少一个信道发送当前通信帧的帧长配置信息。
在一种实施例中, 网络设备中还包括: 通信单元, 通过当前通信帧中至 少一个选择性配置的信道, 与终端设备通信。
上述通信单元在执行通信时, 可能执行如下操作中的一个或多个: 通过当前通信帧中至少一个选择性配置的信道发送指示传输资源的分配 和调度、 及占用传输资源的信道的传输格式的信息;
通过当前通信帧中至少一个选择性配置的信道发送下行业务、和 /或下行 控制信令、 和 /或反馈信息; 通过当前通信帧中至少一个选择性配置的信道发送序列, 该序列用于下 行信道的质量和 /或状态测量;
通过当前通信帧中至少一个选择性配置的信道接收上行业务数据、 和 / 或上行信令、 和 /或反馈信息;
通过当前通信帧中至少一个选择性配置的信道接收序列, 该序列用于上 行信道的质量和 /或状态测量;
通过当前通信帧中至少一个选择性配置的信道接收上行调度请求信息和 /或反馈信息;
通过当前通信帧中至少一个选择性配置的信道接收初始接入信道信息。 本发明还提供一种终端设备, 结构如图 15所述, 该终端设备包括: 接收 单元 151和检测单元 152。
接收单元 151, 用于接收当前通信帧的帧结构配置信息。
检测单元 152, 用于检测当前通信帧的帧结构配置信息, 得知当前通信 帧的结构和帧长。
在一种实施例中, 当前通信帧中至少包括下行子帧, 下行子帧中至少包 括前导序列和系统信息信道, 接收单元 151在系统信息信道接收当前通信帧 的帧结构配置信息。 进一步, 接收单元 151还在系统信息信道接收当前通信 帧的帧长配置信息。
在一种实施例中, 当下行子帧中包括控制信道时, 接收单元 151在系统 信息信道接收一部分当前通信帧的帧结构配置信息, 其中至少包括控制信道 的时长, 在控制信道接收另一部分当前通信帧的帧结构配置信息。
在一种实施例中, 该终端设备还包括: 计算单元, 根据检测单元 152确 定出的当前通信帧的结构, 计算当前通信帧的帧长。 计算单元主要用在网络 设备未直接指示帧长的情况下。
在一种实施例中, 接收单元 151还通过当前通信帧的至少一个信道接收 当前通信帧的帧结构配置信息。 进一步, 接收单元 151还通过当前通信帧的 至少一个信道接收当前通信帧的帧长配置信息。
在一种实施例中, 该终端设备还包括: 通信单元, 通过当前通信帧中至 少一个选择性配置的信道, 与网络设备通信。
上述通信单元执行通信时, 可能执行如下操作中的一个或多个: 通过当前通信帧中至少一个选择性配置的信道接收指示传输资源的分配 和调度、 及占用传输资源的信道的传输格式的信息;
通过当前通信帧中至少一个选择性配置的信道接收当下行业务数据、和 / 或下行控制信令、 和 /或反馈信息;
通过当前通信帧中至少一个选择性配置的信道接收序列, 该序列用于下 行信道的质量和 /或状态测量;
通过当前通信帧中至少一个选择性配置的信道发送上行业务数据、 和 / 或上行信令、 和 /或反馈信息;
通过当前通信帧中至少一个选择性配置的信道发送序列, 该序列用于上 行信道的质量和 /或状态测量;
通过当前通信帧中至少一个选择性配置的信道发送上行调度请求信息和 /或反馈信息;
通过当前通信帧中至少一个选择性配置的信道发送初始接入信道信息。 当前通信帧可能的结构在前文的实施例中已经详细描述,这里不再赞述。 本发明实施例提供的无线通信系统、 网络设备和终端设备中, 涉及到的 通信帧结构可以包含前文中举出各实施例中的结构, 工作原理及相关操作流 程与前述无线通信方法实施方案中基本相同, 在此不再赞述。
釆用本发明的系统和设备, 通过动态配置帧结构和帧长, 能够实现在中 短距离无线通信系统中基于业务需求动态划分上下行无线资源, 能够较好的 动态适配未来种类丰富且特征各异的数据业务需求。 同时, 能够提供甚小的 资源颗粒度, 不仅能够适配不同终端的较大的业务速率需求变化, 而且也能 够较好的适配无线信道的动态变化。 通过动态配置帧长, 不仅能针对室内应 用降低控制开销和调度开销, 也能满足室外快速变化的要求, 同时还能降低 实现的复杂度。 概括言之, 能够权衡业务需求与信道特征, 动态划分上下行 链路资源, 在考虑链路自适应的条件下, 为不同终端动态分配无线资源。
应该明白,公开的过程中的步骤的特定顺序或层次是示例性方法的实例。 基于设计偏好, 应该理解, 过程中的步骤的特定顺序或层次可以在不脱离本 公开的保护范围的情况下得到重新安排。 所附的方法权利要求以示例性的顺 序给出了各种步骤的要素, 并且不是要限于所述的特定顺序或层次。
在上述的评细描述中, 各种特征一起组合在单个的实施方案中, 以筒化 本公开。 不应该将这种公开方法解释为反映了这样的意图, 即, 所要求保护 的主题的实施方案需要比清楚地在每个权利要求中所陈述的特征更多的特 征。 相反, 如所附的权利要求书所反映的那样, 本发明处于比所公开的单个 实施方案的全部特征少的状态。 因此, 所附的权利要求书特此清楚地被并入 详细描述中, 其中每项权利要求独自作为本发明单独的优选实施方案。
上文的描述包括一个或多个实施例的举例。 当然, 为了描述上述实施例 而描述部件或方法的所有可能的结合是不可能的, 但是本领域普通技术人员 应该认识到, 各个实施例可以做进一步的组合和排列。 因此, 本文中描述的 实施例旨在涵盖落入所附权利要求书的保护范围内的所有这样的改变、 修改 和变型。 此外, 就说明书或权利要求书中使用的术语 "包含", 该词的涵盖方 式类似于术语 "包括", 就如同 "包括," 在权利要求中用作 #†接词所解释的 那样。 此外, 使用在权利要求书的说明书中的任何一个术语 "或者" 是要表 示 "非排它性的或者"。

Claims

权 利 要 求 书
1. 一种无线通信系统,包括网络设备和至少一个终端设备,其特征在于: 所述网络设备, 动态配置当前通信帧的结构和帧长, 在当前通信帧中发 送当前通信帧的帧结构配置信息;
所述终端设备, 通过检测当前通信帧的帧结构配置信息, 确定当前通信 帧的结构和帧长。
2.一种网络设备, 其特征在于, 包括:
配置单元, 动态配置当前通信帧的结构和帧长;
发送单元, 在当前通信帧中发送当前通信帧的帧结构配置信息。
3. 如权利要求 2所述的设备, 其特征在于, 当前通信帧中至少包括下行 子帧。
4. 如权利要求 3所述的设备, 其特征在于, 所述下行子帧中至少包括前 导序列和系统信息信道。
5. 如权利要求 4所述的设备, 其特征在于, 所述发送单元在所述系统信 息信道发送当前通信帧的帧结构配置信息。
6. 如权利要求 5所述的设备, 其特征在于, 所述发送单元还在系统信息 信道发送当前通信帧的帧长配置信息。
7. 如权利要求 4所述的设备, 其特征在于, 所述下行子帧中还包括如下 信道中的至少一个:
下行传输信道, 用于传输下行业务、 和 /或下行控制信令、 和 /或反馈; 下行探测信道, 用于下行信道质量和 /或状态的测量与估计。
8. 如权利要求 7所述的设备, 其特征在于, 所述下行探测信道位于所述 下行传输信道的中间。
9. 如权利要求 4所述的设备, 其特征在于, 所述当前通信帧的结构中还 包括上行子帧。
10. 如权利要求 9所述的设备, 其特征在于, 在所述下行子帧和所述上 行子帧之间还具有保护间隔。
11. 如权利要求 9所述的设备, 其特征在于, 所述上行子帧中包括如下 信道中的至少一个:
上行传输信道, 用于传输上行业务、 和 /或上行信令、 和 /或反馈; 上行探测信道, 用于上行信道质量和 /或状态测量与估计;
上行调度请求信道, 用于终端设备触发上行调度请求或信令反馈; 上行随机接入信道, 用于传输上行接入信令或信令反馈。
12. 如权利要求 7至 11任一项所述的设备, 其特征在于, 所述下行子帧 中还包括控制信道, 用于指示传输资源的分配和调度、 及占用传输资源的信 道的传输格式。
13. 如权利要求 12所述的设备, 其特征在于, 所述系统信息信道和所述 控制信道通过时分复用、 频分复用、 码分多址中的一种方式或组合方式复用 资源。
14. 如权利要求 12所述的设备, 其特征在于, 所述发送单元在所述系统 信息信道发送一部分当前通信帧的帧结构配置信息, 其中至少包括所述控制 信道的时长, 在所述控制信道发送另一部分当前通信帧的帧结构配置信息。
15. 如权利要求 2所述的设备, 其特征在于, 所述配置单元获取到调度 信息后, 依据调度信息确定调度的传输资源, 动态配置与调度的传输资源匹 配的当前通信帧的结构和帧长。
16. 如权利要求 2所述的设备, 其特征在于, 所述发送单元通过当前通 信帧的至少一个信道发送当前通信帧的帧结构配置信息。
17. 如权利要求 16所述的设备, 其特征在于, 所述发送单元还通过当前 通信帧的至少一个信道发送当前通信帧的帧长配置信息。
18. 如权利要求 2所述的设备, 其特征在于, 该设备还包括:
通信单元, 通过当前通信帧中选择性配置的信道, 与终端设备通信。
19. 如权利要求 18所述的设备,其特征在于,所述通信单元执行操作时, 包括执行如下操作中的一个或多个:
通过当前通信帧中至少一个选择性配置的信道发送指示传输资源的分配 和调度、 及占用传输资源的信道的传输格式的信息;
通过当前通信帧中至少一个选择性配置的信道发送下行业务数据、 和 / 或控制信令、 和 /或反馈;
通过当前通信帧中至少一个选择性配置的信道发送序列, 该序列用于下 行信道的质量和 /或状态测量;
通过当前通信帧中至少一个选择性配置的信道接收上行业务数据、 和 / 或上行信令、 和 /或反馈信息;
通过当前通信帧中至少一个选择性配置的信道接收序列, 该序列用于上 行信道的质量和 /或状态测量;
通过当前通信帧中至少一个选择性配置的信道接收上行调度请求信息和 /或反馈信息;
通过当前通信帧中至少一个选择性配置的信道接收初始接入信道信息。
20.一种终端设备, 其特征在于, 包括:
接收单元, 接收当前通信帧的帧结构配置信息;
检测单元, 通过检测当前帧的帧结构配置信息, 得知当前通信帧的结构 和帧长。
21. 如权利要求 20所述的设备, 其特征在于, 当前通信帧中至少包括下 行子帧。
22. 如权利要求 21所述的设备, 其特征在于, 所述下行子帧中至少包括 前导序列和系统信息信道。
23. 如权利要求 22所述的设备, 其特征在于, 所述接收单元在所述系统 信息信道接收当前通信帧的帧结构配置信息。
24. 如权利要求 23所述的设备, 其特征在于, 所述接收单元还在系统信 息信道接收当前通信帧的帧长配置信息。
25. 如权利要求 22所述的设备, 其特征在于, 所述下行子帧中还包括如 下信道中的至少一个:
下行传输信道, 用于传输下行业务、 和 /或下行控制信令、 和 /或反馈; 下行探测信道, 用于下行信道质量 /状态的测量与估计。
26. 如权利要求 25所述的设备, 其特征在于, 所述下行探测信道位于所 述下行传输信道的中间。
27. 如权利要求 22所述的设备, 其特征在于, 所述当前通信帧的结构中 还包括上行子帧。
28. 如权利要求 27所述的设备, 其特征在于, 在所述下行子帧和所述上 行子帧之间还具有保护间隔。
29. 如权利要求 27所述的设备, 其特征在于, 所述上行子帧中包括如下 信道中的至少一个:
上行传输信道, 用于传输上行业务、 和 /或上行信令、 和 /或反馈; 上行探测信道, 用于上行信道质量 /状态测量与估计;
上行调度请求信道, 用于所述终端设备触发上行调度请求或信令反馈; 上行随机接入信道, 用于传输上行接入信令或信令反馈。
30. 如权利要求 29所述的设备, 其特征在于, 所述上行调度请求信道、 所述上行随机接入信道与所述上行传输信道通过时分复用、 频分复用、 码分 多址中的一种方式或组合方式复用资源。
31. 如权利要求 25至 29任一项所述的设备, 其特征在于, 所述下行子 帧中还包括控制信道, 用于指示传输资源的分配和调度、 及占用传输资源的 信道的传输格式。
32. 如权利要求 31所述的设备, 其特征在于, 所述接收单元在所述系统 信息信道接收一部分当前通信帧的帧结构配置信息, 其中至少包括所述控制 信道的时长, 在所述控制信道接收另一部分当前通信帧的帧结构配置信息。
33. 如权利要求 20所述的设备, 其特征在于, 该设备还包括:
计算单元, 才艮据所述检测单元确定出的当前通信帧的结构, 计算当前通 信帧的帧长。
34. 如权利要求 20所述的设备, 其特征在于, 所述接收单元通过当前通 信帧的至少一个信道接收当前通信帧的帧结构配置信息。
35. 如权利要求 34所述的设备, 其特征在于, 所述接收单元还通过当前 通信帧的至少一个信道接收当前通信帧的帧长配置信息。
36. 如权利要求 20所述的设备, 其特征在于, 该设备还包括:
通信单元, 通过当前通信帧中至少一个选择性配置的信道, 与网络设备 通信。
37. 如权利要求 36所述的设备, 其特征在于, 所述通信单元与网络设备 通信时, 执行如下操作中的一个或多个:
通过当前通信帧中至少一个选择性配置的信道接收指示传输资源的分配 和调度、 及占用传输资源的信道的传输格式的信息;
通过当前通信帧中至少一个选择性配置的信道接收当下行业务数据、和 / 或下行控制信令、 和 /或反馈;
通过当前通信帧中至少一个选择性配置的信道接收序列, 该序列用于下 行信道的质量和 /或状态测量;
通过当前通信帧中至少一个选择性配置的信道发送上行业务数据、 上行 信令、 和 /或反馈信息;
通过当前通信帧中至少一个选择性配置的信道发送序列, 该序列用于上 行信道的质量和 /或状态测量;
通过当前通信帧中至少一个选择性配置的信道发送上行调度请求信息和 /或反馈信息;
通过当前通信帧中至少一个选择性配置的信道发送初始接入信道信息。
PCT/CN2012/072781 2011-03-25 2012-03-22 无线通信系统与设备 WO2012130075A1 (zh)

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