WO2012130097A1 - 一种用于资源请求的方法、站点和中心接入点 - Google Patents

一种用于资源请求的方法、站点和中心接入点 Download PDF

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Publication number
WO2012130097A1
WO2012130097A1 PCT/CN2012/072904 CN2012072904W WO2012130097A1 WO 2012130097 A1 WO2012130097 A1 WO 2012130097A1 CN 2012072904 W CN2012072904 W CN 2012072904W WO 2012130097 A1 WO2012130097 A1 WO 2012130097A1
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WIPO (PCT)
Prior art keywords
resource
transmission resource
request
resource request
sta
Prior art date
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PCT/CN2012/072904
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English (en)
French (fr)
Inventor
鲍东山
周玉宝
于晓燕
姚惠娟
闫志刚
刘慎发
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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Publication date
Application filed by 北京新岸线无线技术有限公司 filed Critical 北京新岸线无线技术有限公司
Priority to KR1020137028997A priority Critical patent/KR101910219B1/ko
Priority to US14/008,300 priority patent/US20140112264A1/en
Priority to CN2012800131505A priority patent/CN103444249A/zh
Priority to JP2014501420A priority patent/JP6105550B2/ja
Priority to EP12763451.7A priority patent/EP2693818A4/en
Publication of WO2012130097A1 publication Critical patent/WO2012130097A1/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
    • 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
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453Resources in frequency domain, e.g. a carrier in FDMA
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/21Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W84/00Network topologies
    • H04W84/02Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10Small scale networks; Flat hierarchical networks
    • H04W84/12WLAN [Wireless Local Area Networks]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W88/00Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02Terminal devices
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W88/00Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08Access point devices

Definitions

  • the application requires the application date to be March 31, 2011, the application number is 201110081288.6, and the invention name is a priority of the prior application of the wireless communication method, and the application The date is May 19, 2011, and the application number is 201110130194.3.
  • the invention name is the priority of the prior application of a communication system.
  • the application date is July 6, 2011, and the application number is 201110188594.X.
  • the invention name is one.
  • wireless network technology has 802.11-based wireless LAN WiFi technology, 802.15-based Bluetooth Blu-etooth system, and Femto technology for indoor applications from mobile communication systems.
  • WiFi technology based on IEEE 802.11 is one of the most widely used wireless network transmission technologies today. It is mainly used in wireless office i or network environments. The application scenarios are mostly indoors and can also be applied to outdoor environments.
  • the 802.11 system evolved from the original 802.11 b based on the C D M A transmission mechanism to 802.11 a and 802.11 g based on OFDM technology.
  • the 802.11 ⁇ physical layer peak rate can reach 600 Mbps by introducing multi-antenna (MIMO) technology, but usually the media access control (MAC, Media ACess Control) layer is only capable of vomiting. Up to 300Mbps.
  • MIMO multi-antenna
  • MAC Media ACess Control
  • the MAC layer design based on CSMA/CA Carrier Sense/Collision Avoidance
  • CSMA/CA Carrier Sense/Collision Avoidance
  • Femto technology based on 3GPP standard is a new technology for indoor coverage evolved from mobile communication systems.
  • Femto technology based on 3G system uses CDMA transmission mechanism, and Femto technology for LTE or WiMAX system uses OFDM transmission mechanism. . Its multiple access mechanism allocates mutually orthogonal access resources for different users by time, frequency and codeword, which is fundamentally different from the competitive CSMA/CA random multiple access.
  • Femto technology is derived from 3G/LTE/WiMAX systems for mobile communication systems. Since the 3G/LTE/WiMAX system is mainly for wide-area coverage mobile communication scenarios, its system features are not optimized for short- and medium-range wireless communication scenarios.
  • the technical problem to be solved by the present invention is to provide a method, a site and a central access point for resource request, for requesting resources required for uplink transmission of data.
  • the present invention provides a method for a resource request, for initiating a resource request in a path-by-path manner, including: carrying a transmission resource request in a data frame;
  • the present invention further provides a method for a resource request, which is used to process a resource request initiated in a way manner, including: receiving a data frame carrying a transmission resource request;
  • the present invention provides a STA for resource request, which is used to initiate a resource request in a way manner, including:
  • the encapsulating module is configured to carry the transmission resource request in the data frame
  • the first sending module is configured to send the data frame that carries the transmission resource request.
  • the present invention further provides a central access point (CAP) for a resource request, comprising: a receiving module, configured to receive a data frame carrying a transmission resource request; and a parsing module, configured to use the data Parsing out the transmission resource request in the frame;
  • CAP central access point
  • a resource allocation module configured to allocate a transmission resource to the corresponding station STA according to the transmission resource request
  • a sending module configured to send a transmission resource request response to the corresponding STA, where the transmission resource request response carries a transmission resource indication.
  • FIG. 1 is a flowchart of a method for requesting a resource according to a first embodiment of the present invention
  • FIG. 2 is a schematic flowchart of a method for generating a scheduling request sequence according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a principle of a PN sequence generator according to an embodiment of the present invention
  • FIG. 4 is a schematic structural diagram of an independent resource request frame according to an embodiment of the present invention
  • FIG. 5 is a block diagram of a STA device for implementing a contention resource request of the first embodiment
  • Figure 6 is a block diagram of a CAP device for implementing a contention resource request of the first embodiment
  • Figure 7 is a second embodiment of the present invention
  • FIG. 8 is a block diagram of a STA device for implementing a path resource request of the second embodiment
  • FIG. 9 is a block diagram of a CAP device for implementing a path resource request of the second embodiment
  • FIG. 10 is a flowchart of a method for polling a resource request according to a third embodiment of the present invention
  • FIG. 11 is a block diagram of a CAP device for implementing a polling resource request of the third embodiment
  • FIG. 12 is a flowchart of a method for polling a resource request according to a fourth embodiment of the present invention
  • FIG. 13 is a fourth embodiment for implementing the fourth embodiment
  • FIG. 14 is a flowchart of a method for polling a resource request according to a fifth embodiment of the present invention
  • FIG. 15 is a block diagram of a CAP device for implementing a polling resource request of the fifth embodiment
  • 16 is a flowchart of a method for polling a resource request according to a sixth embodiment of the present invention
  • Figure 17 is a block diagram of a CAP apparatus for implementing the polling resource request of the sixth embodiment.
  • An embodiment of the present invention provides a resource request method, where a site that needs to transmit data uplink is provided.
  • the STA actively initiates a transmission resource request to the central access point (Central Access Point, called CAP), and acquires uplink transmission resources through the contention method.
  • the CAP is an entity that provides access services for the visited STAs; the STA is a terminal device that has a medium access control (MAC) and a physical layer (PHY) functional interface and can communicate with the CAP.
  • the method for requesting resources in the embodiment of the present invention is specifically as shown in FIG. 1 , including the following steps: Step S101 : The STA sends a first transmission resource request.
  • Step S102 The CAP receives the first transmission resource request, and allocates a first transmission resource to the STA.
  • Step S103 The CAP sends a first transmission resource request response to the STA, where the first transmission resource request response carries a first transmission resource indication.
  • Step S104 The STA receives the first transmission resource request response.
  • Step S105 The STA sends the second transmission resource request by using the first transmission resource.
  • Step S106 The CAP receives the second transmission resource request. , allocating a second transmission resource to the STA;
  • Step S107 The CAP sends a second transmission resource request response to the STA, and the second transmission resource request response carries a second transmission resource indication.
  • Step S108 The STA receives the second transmission resource request response.
  • Step S109 The STA sends data by using the second transmission resource.
  • the STA initiates a transmission resource request to the CAP, and initiates a first transmission resource request, triggers a resource request process, requests a first transmission resource, and then uses the first
  • the transmission resource sends a second transmission resource request, and requests a second transmission resource for uplink transmission data, thereby completing the entire resource request process and obtaining resources required for uplink transmission data.
  • the first transmission resource request may be initiated by using an uplink scheduling mode.
  • the first transmission resource request may also be initiated in other manners, for example, by using an idle uplink transmission resource, or by being sent in an uplink data frame to be sent with a data frame to initiate, and the like.
  • the invention is not limited herein.
  • the manner in which the first transmission resource request is initiated by the scheduling mode in the embodiment of the present invention is further described below.
  • the first transmission resource request may specifically be a scheduling request sequence.
  • the CAP After receiving the scheduling request sequence as the first transmission resource request, the CAP carries the index of the scheduling request sequence, the frequency domain cyclic shift index of the scheduling request sequence, and the scheduling request sequence in the first transmission resource request response.
  • the STA sends an index of the scheduling request sequence used when transmitting the scheduling request sequence, a frequency domain cyclic shift index of the scheduling request sequence, the scheduling request sequence is sent in the uplink scheduling request channel, and the scheduling request sequence
  • the system frame number is used as a judgment basis, and receives a first transmission resource request response corresponding to the scheduling request sequence.
  • the first transmission resource request may also be in other forms, and the present invention is not limited herein.
  • the manner in which the scheduling request sequence is designed as the first transmission resource request in the embodiment of the present invention will be described below.
  • a plurality of scheduling request sequences that can be used as the first transmission resource request may be pre-designed.
  • the STA may select one of the multiple scheduling request sequences as the first transmission resource request according to a predetermined rule.
  • the selection method can be set as needed, such as equal probability selection, and so on.
  • the number of the scheduling request sequence that can be used as the first transmission resource request may be the number of the scheduling request sequence as the identifier of the scheduling request sequence, and the number may be an index.
  • different scheduling request sequences may also be identified in other ways, and the invention is not limited herein.
  • the embodiment of the present invention further provides a specific method for generating a scheduling request sequence, as shown in FIG. 2, which includes the steps of: generating a PN sequence, a constellation mapping, a subcarrier mapping, generating a cyclic shift sequence, and a 'f clip speed Fourier leaf Inverse Fast Fourier Transform (inverse Fast Fourier Transform), force port CP.
  • FIG. 2 shows a specific method for generating a scheduling request sequence, as shown in FIG. 2, which includes the steps of: generating a PN sequence, a constellation mapping, a subcarrier mapping, generating a cyclic shift sequence, and a 'f clip speed Fourier leaf Inverse Fast Fourier Transform (inverse Fast Fourier Transform), force port
  • CAP—MAC refers to the lowest 7 bits of the CAP's MAC address, which is the PN sequence J 'J index ( 0 ⁇ ⁇ 4 ), f ⁇ cs ⁇ is the cyclic shift parameter set, ⁇ is the cyclic shift parameter index ( 0 ⁇ ⁇ 8) ).
  • the step of generating a PN sequence can be implemented as shown in FIG. That is, the PN sequence uses a maximum length linear feedback shift register sequence with a generator polynomial of 1 + X 11 + X 15 . Initial value of the register
  • the constellation mapping step can use BPSK modulation. As shown in Table 1, the sequence ⁇ 'after BPSK modulation, the sequence e ' is obtained. Table 1
  • the subcarriers may be mapped according to the following equation according to the following formula to obtain a sequence 0.
  • the step of generating a cyclic shift sequence may be performed by cyclically shifting the subcarrier-mapped sequence M ' according to the following equation to obtain a sequence.
  • is the cyclic shift parameter
  • the unit is the number of points. For a 20 M Hz system, , ⁇ 0 32 64 96 1 28 1 60 192 224 ⁇ . After that, after the I FFT and the CP processing are performed on the cyclic shift sequence, a scheduling request sequence is obtained. ⁇ This method will get 32 scheduling request sequences. Thereafter, the contention request can be initiated using the scheduling request sequence.
  • the scheduling request sequence may also be generated in other manners, and the present invention is not limited herein.
  • the STA sends the first transmission resource request to be sent on the uplink scheduling request channel.
  • the embodiment of the present invention intelligently initiates the first transmission resource request by using the uplink scheduling request channel, and implements the resource request of the embodiment of the present invention by using a contention manner. The process, so that there is no need to monitor whether the uplink transmission channel has resources available, and even if there is no uplink transmission resource, the resource request can be made.
  • the first transmission resource request may also be initiated by using another channel.
  • the uplink transmission channel is utilized, and the present invention is not limited herein.
  • the first transmission resource request is initiated on the uplink scheduling request channel
  • the sending position of the scheduling request sequence may be designed by using the location of the OFDM symbol corresponding to the uplink scheduling request channel in the scheduling request sequence.
  • the sending position of the scheduling request sequence may also be identified in other manners, and the present invention is not limited herein.
  • the uplink scheduling request channel initiates the first transmission resource request
  • the first transmission resource request may be modulated and sent to an uplink scheduling request channel by using, for example, BPSK, QPSK, or the like.
  • the CAP may send a resource allocation indication by using a transmission control channel. That is, the CAP may send a first transmission resource request response on the transmission control channel, where the first transmission resource indication is carried.
  • the STA will receive the first transmission resource request response on the transmission control channel, and learn from it the first transmission resource allocated thereto.
  • the first transmission resource request response may be sent through other channels, and the present invention is not limited herein.
  • the CAP may send the first transmission resource request response in a broadcast manner.
  • the STA will receive a corresponding response according to a preset rule.
  • the STA uses the scheduling request sequence to trigger the uplink resource request, the index of the scheduling request sequence used when the scheduling request sequence is sent, the frequency domain cyclic shift index of the scheduling request sequence, and the scheduling request sequence are scheduled in the uplink.
  • the sending location of the request channel and the system frame number sent by the scheduling request sequence receive a first transmission resource request response corresponding to the scheduling request sequence.
  • the embodiment of the present invention provides a specific format of the first transmission resource request response, which is shown in Table 2.
  • the embodiment of the present invention provides a format of a second transmission resource request, and supports reporting the requested resource based on the service flow.
  • the second transmission resource request includes an identifier of the STA that initiates the second transmission resource request, where the STA is a size of a bandwidth resource requested by each service flow in one or more service flows, and The identification of each service flow.
  • the CAP can learn the service flows of the STA and the resource requirements of the service flows by analyzing the second transmission resource request.
  • the second transmission resource request may further include a type of bandwidth resource requested for each service flow.
  • the CAP supports the STA to select the requested band for different traffic flows as needed. Wide resource types, resource requests are more flexible and more user-friendly.
  • the type of the optional bandwidth resource may include: an incremental bandwidth, configured to indicate, when the second transmission resource is allocated for the service flow, increase or decrease the service flow based on the allocated bandwidth resource size of the service flow. The size of the bandwidth resource for this request.
  • the total bandwidth is used to indicate that the size of the bandwidth resource requested by the service flow is replaced by the bandwidth resource allocated by the service flow when the second transmission resource is allocated for the service flow.
  • the embodiment of the present invention further provides another format of the second transmission resource request, and supports the resource requested by the STA to report.
  • the second transmission resource request includes an identifier of the STA that initiates the second transmission resource request, and a size of the total bandwidth resource requested by the STA.
  • the second transmission resource request may further include a type of bandwidth resource required by the STA.
  • the CAP supports the STA to select the requested bandwidth resource type according to the needs, and the resource request is more flexible and more user-friendly.
  • the types of optional bandwidth resources can include:
  • An incremental bandwidth configured to increase or decrease the size of the bandwidth resource requested by the STA according to the size of the bandwidth resource allocated by the STA, when the second transmission resource is allocated to the STA;
  • the total bandwidth is used to indicate that the size of the bandwidth resource requested by the STA is replaced by the bandwidth resource size allocated by the STA when the second transmission resource is allocated to the STA.
  • the embodiment of the present invention further provides a method for expressing a bandwidth resource, by designing a resource table, and indexing the bandwidth resource in a preset resource table to indicate a size of the requested bandwidth resource. Therefore, when the required bandwidth resource is reported, only the bandwidth resource needs to be carried, and the index value in the resource table is required to be carried, and when the requested bandwidth resource is large, the index value is used instead of the specific bandwidth resource value, which is Reduce the occupied bits and save transmission resources.
  • Table 3 an example of resource representation is given below, as shown in Table 3.
  • resource tables of various precision ranges can be designed as needed.
  • an appropriate resource table may be selected according to the requested resource, and the resource request carries the identifier and index of the resource table, and the CAP side maintains the same resource table, according to the identifier of the resource table in the received resource request. And the index, and locates the resource size of the corresponding index in the corresponding resource table, so as to know the size of the resource requested by the STA.
  • the second transmission resource request may be encapsulated and sent as an independent resource request frame.
  • a specific independent resource request frame structure is provided by using the foregoing service flow reporting method.
  • the frame header, the frame body, and the frame check sequence (FCS) are included.
  • the frame header contains frame control information, such as frame type (here, management control), subtype (here, independent resource request frame), version information, etc.; frame body contains STAID, FID number, and one or more
  • the FID information block includes a service flow identifier and a resource index in each FID information block.
  • the resource index is an index of the requested bandwidth resource in the resource table.
  • information indicating the resource type of the service flow request may also be set in the bandwidth resource request information of the service flow.
  • the STAID field of the frame designing the independent resource request frame occupies 12 bits
  • the FID number field occupies 4 bits
  • the FCS field occupies 32 bits
  • each FID information block occupies 16 bits, which in turn is a 4-bit FID field and a 4-bit reservation.
  • Field, 7bit resource index field and lbit reserved field is a 4-bit FID field and a 4-bit reserved field.
  • the CAP may send the second transmission resource request response in a unicast manner, where the second transmission resource indication is carried.
  • the STA according to the pre Set the rule to receive the corresponding response.
  • the STA ID is used as the basis for the correct reception, that is, the STA carries its own STAID in the second transmission resource request, and when the CAP returns the second transmission resource request response for the STA, the CAP also uses the second transmission resource.
  • the STA of the STA is carried in the request response, and the STA determines whether the corresponding response is correctly received by determining whether the received second transmission resource request response carries its own STAID.
  • the CAP may deliver the resource allocation indication by using the transmission control channel. That is, the CAP may send a second transmission resource request response on the transmission control channel, where the second transmission resource indication is carried.
  • the STA will receive the second transmission resource request response on the transmission control channel, and learn from it the second transmission resource allocated thereto.
  • the second transmission resource request response may be sent through other channels, and the present invention is not limited herein.
  • the embodiment of the invention monitors the time of the response return, thereby determining whether the resource request is successful, so as to re-initiate the resource request in time, and at the same time, the timing is implemented by counting the frames, so that the timing is more accurate and the processing is more timely.
  • the embodiment of the present invention further provides an STA for implementing a resource request.
  • the method includes: a first sending module 501, configured to send a first transmission.
  • the first receiving module 502 is configured to receive a first transmission resource request response, where the first transmission resource request response carries a first transmission resource indication;
  • a second sending module 503 configured to send a second transmission resource request by using the first transmission resource
  • a second receiving module 504 configured to receive a second transmission resource request response, where the second transmission resource request response carries a second Transmission resource indication
  • the third sending module 505 is configured to send data by using the second transmission resource.
  • the STA may further include: a resource allocation module, located between the second receiving module 504 and the third sending module 505, configured to allocate resources according to the second transmission resource indication Assign between business flows.
  • the third sending module 505 transmits data of the plurality of service flows on the respective transmission resources according to the resource allocation result of the resource allocation module.
  • the first transmission resource request may be a scheduling request sequence.
  • the first transmission resource request is a scheduling request sequence.
  • the first sending module 501 is configured to send the scheduling request sequence on an uplink scheduling request channel.
  • the first receiving module 502 is configured to: according to an index of the scheduling request sequence, a frequency domain cyclic shift index of the scheduling request sequence, a sending position of the scheduling request sequence in an uplink scheduling request channel, and The system frame number sent by the scheduling request sequence receives a first transmission resource request response corresponding to the scheduling request sequence.
  • the first receiving module 502 is configured to receive the first transmission resource request response on a transmission control channel.
  • the second sending module 503 is configured to carry the identifier of the STA and the requested resource in the second transmission resource request.
  • the second sending module 503 performs resource request based on the service flow by carrying the identifier of one or more service flows in the second transmission resource request and the size of the bandwidth resource requested by each service flow. .
  • the second sending module 503 is configured to indicate, in the second transmission resource request, a size of the bandwidth resource by using an index in the preset resource table.
  • the second sending module 503 is further configured to carry the number of service flows requesting resources in the second transmission resource request.
  • the second sending module 503 is configured to encapsulate the second transmission resource request into an independent resource request frame and send the same;
  • the independent resource request frame includes a frame header, a frame body, and a frame check sequence FCS.
  • the frame body includes: an identifier of the STA, and one or more FID information blocks, where each FID information block includes a service flow identifier and a resource. index.
  • the second sending module 503 is configured to encapsulate the second transmission resource request into another independent resource request frame, where the independent resource request frame includes a frame header, a frame body, and a frame check. Sequence FCS;
  • the frame body includes: an identifier of the STA, a number of service flows, and one or more FID information blocks, where each FID information block includes a service flow identifier and a resource index.
  • the first retransmission module is further connected to the first sending module 501 and the first receiving module 502, and the first sending module 501 sends the first After the resource request is transmitted, the timing is started. If the first receiving module 502 does not receive the first transmission resource request response after the preset first maximum waiting frame interval, the current resource request fails, and the current resource request is triggered. The first sending module 501 resends the first transmission resource request.
  • the second retransmission module is further included, and the second sending module 503 and the second receiving module 504 are respectively connected, and the second sending module 503 sends the second.
  • the second connection If the receiving module 504 still does not receive the second transmission resource request response, it is considered that the current resource request fails, and the first sending module 501 is triggered to resend the first transmission resource request.
  • the second transmission resource request may further include a type of bandwidth resource requested for each service flow.
  • the type of the bandwidth resource may include: an incremental bandwidth, configured to indicate, when the second transmission resource is allocated for the service flow, increase or decrease according to the size of the allocated bandwidth resource for the service flow.
  • the size of the bandwidth resource of the current service flow request, and the total bandwidth, which is used to indicate that the size of the bandwidth resource requested by the current service flow is replaced by the service flow has been allocated.
  • the second transmission resource request may further be based on the STA reporting resource request: that is, the second transmission resource request may include a size of a total bandwidth resource required by the STA that initiates the second transmission resource request.
  • the preset resource table includes a resource table of multiple precision ranges.
  • the embodiment of the present invention further provides a CAP for implementing a resource request.
  • the method includes: a first receiving module 601, configured to receive the first transmission. a resource request, and allocating a first transmission resource to the corresponding STA;
  • the first sending module 602 is configured to send a first transmission resource request response to the corresponding STA, where the first transmission resource request response carries a first transmission resource indication;
  • the second receiving module 603 is configured to receive a second transmission resource request, and allocate a second transmission resource to the corresponding STA.
  • the second sending module 604 is configured to send a second transmission resource request response to the corresponding STA, where the second transmission resource request response carries a second transmission resource indication, where the first transmission resource is used by the STA to send the second transmission.
  • the second transmission resource is used by the STA to send data.
  • the first receiving module 601 receives the first transmission resource request from an uplink scheduling request channel, where the first transmission resource request is a scheduling request sequence, and the first sending module 602 is configured to: Carrying the sequence of the corresponding scheduling request sequence in the first resource request response? I. A frequency domain cyclic shift index of the scheduling request sequence, a sending position of the scheduling request sequence in an uplink scheduling request channel, and a system frame number sent by the scheduling request sequence.
  • the first sending module 602 is configured to send the first transmission resource request response on a transmission control channel.
  • the first sending module 602 is configured to send the first transmission resource request response by using a broadcast manner.
  • the second sending module 604 is configured to send the second transmission resource request response on the transmission control channel.
  • the second sending module 604 is configured to send the second transmission resource request response in a unicast manner.
  • the second sending module 604 carries the identifier of the corresponding STA and the resource allocated for the STA in the second transmission resource request response.
  • the embodiment of the present invention further provides a system for implementing a resource request, including the STA and the CAP as described above, and the two interact with each other to complete the resource by means of contention.
  • the request process is especially applicable to scenarios where the STA does not currently transmit resources.
  • the embodiment of the invention further provides a method for resource request, including:
  • the transmission resource request includes an identifier of the STA, an identifier of one or more service flows, and a size of the bandwidth resource requested for each service flow; and the transmission resource request is sent.
  • the transmission resource request further includes the number of service flows requesting the resource.
  • the transmission resource request is encapsulated and sent as an independent resource request frame.
  • the independent resource request frame includes a frame header, a frame body, and an FCS.
  • the frame body includes: an identifier of the STA, and one or more FID information blocks, where each FID information block includes a service flow identifier and a resource index.
  • the transmission resource request is encapsulated and sent as another independent resource request frame:
  • the independent resource request frame includes a frame header, a frame body, and an FCS;
  • the frame body includes: an identifier of the STA, a number of service flows, and one or more FID information blocks, where each FID information block includes a service flow identifier and a resource index.
  • the transmission resource request further includes a class of bandwidth resources required by each service flow. Type.
  • the type of the bandwidth resource includes: an incremental bandwidth, used to indicate that when the transmission resource is allocated for the service flow, the service flow is increased or decreased based on the size of the allocated bandwidth resource of the service flow.
  • the size of the bandwidth resource of this request is:
  • the total bandwidth is used to indicate that the size of the bandwidth resource requested by the service flow is replaced by the bandwidth resource allocated by the service flow when the transmission resource is allocated for the service flow.
  • the size of the bandwidth resource is indicated by an index of the bandwidth resource in a preset resource table.
  • the transmission resource request carries a preset resource table type, and different types of resource tables correspond to different precision ranges.
  • the preset resource table includes resource tables of various precision ranges.
  • An embodiment of the present invention further provides another method for resource request, including:
  • the transmission resource request includes an identifier of the STA, a size of a total bandwidth resource requested by the STA, and a request for transmitting the transmission resource.
  • the transmission resource request further includes a type of the bandwidth resource requested by the STA.
  • the type of the bandwidth resource includes: an incremental bandwidth, used to indicate that when the transmission resource is allocated to the STA, the STA current request is increased or decreased on the basis of the bandwidth resource allocated by the STA.
  • the size of the bandwidth resource is used to indicate that the size of the bandwidth resource requested by the STA is replaced by the size of the bandwidth resource allocated by the STA when the transmission resource is allocated to the STA.
  • the size of the bandwidth resource is indicated by an index of the bandwidth resource in a preset resource table.
  • the transmission resource request carries a preset resource table type, and different types of resource tables correspond to different precision ranges.
  • the preset resource table includes resource tables of various precision ranges.
  • the embodiment of the present invention further provides a method for requesting a resource, which uses the timing and resources for transmitting the uplink data, and sends the transmission resource request to the CAP along with the uplink data, as shown in FIG. 7, which includes the following steps: Step S701: The STA carries the transmission resource request in the data frame.
  • Step S702 The STA sends the data frame carrying the transmission resource request.
  • Step S703 The CAP receives the data frame that carries the transmission resource request.
  • Step S704 The CAP parses the transmission resource request from the data frame.
  • Step S705 The CAP allocates a transmission resource to the STA according to the transmission resource request.
  • Step S706 The CAP sends a transmission resource request response to the STA, and the transmission resource request response carries a transmission resource indication.
  • Step S707 The STA receives the transmission resource request response.
  • Step S708 The STA sends data by using the transmission resource.
  • the transmission resource request is skillfully transmitted to the CAP along with the uplink data by the above method to request the resource.
  • the resource may be requested by using the foregoing path resource requesting manner in the embodiment of the present invention, so that the uplink transmission resource required for the transmission resource request is not required to be sent first, and the resource request is implemented during the interaction process. With fewer steps, the time required to request a resource is shorter.
  • the STA may further carry a path request indication in the data frame carrying the transmission resource request, to indicate the existence of the transmission resource request.
  • the CAP can quickly determine whether the data frame carries the transmission resource request by using the path request indication.
  • the path request indication may not be carried, but the transmission resource request is carried by, for example, setting a specific field, and the corresponding field is parsed to determine whether the data frame carries the transmission resource request. The invention is not limited herein.
  • the path request indication when the CAP parses the data frame, the frame header is generally parsed first, and the parameter information is obtained. Therefore, when the path request indication is encapsulated in the data frame, the path request indication may be encapsulated in the frame header of the data frame. in.
  • a path request indication field may be set in the frame header of the data frame, and the value of the field indicates the existence of the transmission resource request. For example, 1 means there is a transmission resource request and 0 means there is no transmission resource request.
  • the associated request indication field may be a new field, and may also use an existing field in the frame header, such as an idle field, to redefine the field as an associated request indication field, which is not limited herein.
  • the location of the associated request indication field in the frame header may be set according to a preset rule, and the present invention is not limited herein.
  • the STA may carry the transmission resource request in a frame body of the data frame.
  • a path resource request field may be set in a frame body of the data frame, and the transmission resource request is carried.
  • the path resource request field may not be set in the frame body of the data frame, or the path resource request field may be filled in a fixed value.
  • the associated resource request field may be a new field, or an existing field in the frame body, such as an idle field, may be used to redefine the field as a path-resource request field.
  • the present invention is not limited herein.
  • the location of the associated resource request field in the frame body is set according to a preset rule.
  • the path resource request field may be specified as the first thousand bits of the frame body, and the present invention is not limited herein.
  • the embodiment of the present invention provides a format for transmitting a resource request reported in a way manner, and supports reporting the requested resource based on the service flow.
  • the transmission resource request includes an identifier of a STA that initiates the transmission resource request, where the STA is a size of a bandwidth resource requested by each service flow in one or more service flows, and each service flow Logo.
  • the CAP can learn the service flows of the STA and the resource requirements of the service flows by parsing the transmission resource request.
  • the transmission resource request may further include a type of bandwidth resource requested for each service flow.
  • the CAP supports the STA to select the requested bandwidth resource type for different service flows as needed, and the resource request is more flexible and more user-friendly.
  • the type of the optional bandwidth resource may include: an incremental bandwidth, configured to indicate, when the second transmission resource is allocated for the service flow, increase or decrease the service flow based on the allocated bandwidth resource size of the service flow. The size of the bandwidth resource for this request.
  • the total bandwidth is used to indicate that the size of the bandwidth resource requested by the service flow is replaced by the bandwidth resource allocated by the service flow when the second transmission resource is allocated for the service flow.
  • the embodiment of the present invention further provides another format for transmitting a resource request, and supports the resource requested by the STA to report.
  • the transmission resource request includes an identifier of a STA that initiates the transmission resource request, and a size of a total bandwidth resource required by the STA.
  • the transmission resource request may further include a type of bandwidth resource required by the STA.
  • the CAP supports the STA to select the requested bandwidth resource type according to the needs, and the resource request is more flexible and more user-friendly.
  • the types of optional bandwidth resources can include:
  • An incremental bandwidth configured to increase or decrease the size of the bandwidth resource requested by the STA according to the size of the bandwidth resource allocated by the STA, when the second transmission resource is allocated to the STA;
  • the total bandwidth is used to indicate that the size of the bandwidth resource requested by the STA is replaced by the bandwidth resource size allocated by the STA when the second transmission resource is allocated to the STA.
  • the embodiment of the present invention further provides a bandwidth resource representation method.
  • a resource table for example, Table 3
  • the bandwidth resource is indexed in a preset resource table to indicate the size of the requested bandwidth resource. Therefore, when the required bandwidth resource is reported, only the bandwidth resource needs to be carried, and the index value in the resource table is required to be carried, and when the requested bandwidth resource is large, the index value is used instead of the specific bandwidth resource value, which is Reduce the occupied bits and save transmission resources.
  • resource tables of various precision ranges can be designed as needed.
  • an appropriate resource table may be selected according to the requested resource, and the resource request carries the identifier and index of the resource table, and the CAP side maintains the same resource table, according to the identifier of the resource table in the received resource request. And the index, and locates the resource size of the corresponding index in the corresponding resource table, so as to know the size of the resource requested by the STA.
  • the embodiment of the present invention provides a specific data frame structure carrying a transmission resource request, including a frame header, a frame body, and an FCS.
  • the path header includes a path resource request field.
  • the frame body includes a path resource request field
  • the path resource request field includes one or A plurality of FID information blocks, each FID information block including a service flow identifier (FID) and a resource index.
  • the resource index indicates an index of the requested bandwidth resource in the resource table.
  • the FID information block also includes a type field of the resource table to support resource partitioning of different granularities.
  • a type field of the resource table to support resource partitioning of different granularities.
  • the CAP may send the transmission resource request response in a unicast manner, where the transmission resource indication is carried.
  • the STA receives the corresponding response according to a preset rule.
  • the STA ID is used as a basis for the correct reception, that is, the STA carries its own STAID in the transmission resource request, and when the CAP returns a transmission resource request response for the STA, the CAP also carries the foregoing in the transmission resource request response.
  • STA's STAID the STA determines whether the corresponding response is correctly received by determining whether the received transmission resource request response carries its own STAID.
  • the CAP may deliver the resource allocation indication by using the transmission control channel. That is, the CAP may send a transmission resource request response on the transmission control channel, where the transmission resource indication is carried.
  • the STA will receive the transmission resource request response on the transmission control channel, and learn from it the transmission resource allocated thereto.
  • the transmission resource request response may be designed to be sent through other channels, and the present invention is not limited herein.
  • the STA allocates resources between the service flows according to the transmission resource indication before transmitting the data by using the transmission resource.
  • the STA After the STA sends the data frame carrying the transmission resource request, if the corresponding response is not received after the preset maximum waiting frame interval is exceeded, the STA considers that the current request fails and needs to re-request the resource.
  • the embodiment of the invention monitors the time of the response return, so as to determine whether the resource request is successful, so as to re-initiate the resource request in time, and at the same time, the timing is implemented by counting the frames, so that the timing is more accurate and the processing is more timely.
  • the embodiment of the present invention further provides an STA for implementing a request for a path resource, as shown in FIG. 8, including: an encapsulation module 801, configured to transmit a resource request Hosted in a data frame;
  • the first sending module 802 is configured to send the data frame that carries the transmission resource request.
  • the receiving module 803 is configured to receive a transmission resource request response, where the transmission resource request response carries a transmission resource indication;
  • the second sending module 804 is configured to send data by using the transmission resource.
  • the STA may further include: a resource allocation module, located between the receiving module 803 and the second sending module 804, configured to allocate resources in each service flow according to the transmission resource indication Assign between.
  • the second sending module 804 according to the resource allocation result of the resource allocation module, transmits the plurality of service flows on the respective corresponding transmission resources.
  • the encapsulating module 801 may further encapsulate a path request indication in the data frame to indicate the existence of the transmission resource request.
  • the encapsulating module 801 can carry the path request indication in a frame header of the data frame.
  • the encapsulating module 801 can set a field in the frame header of the data frame, and indicate the existence of the transmission resource request by using the value of the field.
  • the encapsulating module 801 can carry the transmission resource request in a frame body of the data frame.
  • the encapsulating module 801 can set a field in the frame body of the data frame to carry the transmission resource request.
  • the transmission resource request may be based on the service flow reporting resource request: that is, the transmission resource request may include an identifier of one or more service flows, and a size of the bandwidth resource requested for each service flow.
  • the transmission resource request may further include a type of bandwidth resource requested for each service flow.
  • the type of the bandwidth resource may include: an incremental bandwidth, used to indicate that when the transmission resource is allocated for the service flow, the service is increased or decreased based on the size of the allocated bandwidth resource for the service flow.
  • the size of the requested bandwidth resource is replaced by the bandwidth resource size allocated by the service flow.
  • the transmission resource request may be based on a STA reporting resource request: that is, the transmission resource request may include a size of a total bandwidth resource required by the STA that initiates the transmission resource request.
  • the transmission resource request may further include a type of the bandwidth resource.
  • the type of the bandwidth resource may include: an incremental bandwidth, used to indicate that when the transmission resource is allocated to the STA, the STA is added or decreased based on the size of the allocated bandwidth resource for the STA.
  • the size of the requested bandwidth resource the total bandwidth is used to indicate that the size of the bandwidth resource requested by the STA is replaced by the bandwidth resource size allocated by the STA when the transmission resource is allocated to the STA.
  • the transmission resource request includes an identifier of a STA that sends the transmission resource request; and the transmission resource request response carries an identifier of the STA.
  • the size of the bandwidth resource may be indicated by an index in a preset resource table.
  • the preset resource table includes a resource table of multiple precision ranges.
  • the second sending module 804 transmits a plurality of service flows on the corresponding transmission resources of the transmission resources.
  • the receiving module 803 can receive the transmission resource request response on a transmission control channel.
  • the STA may further include: a retransmission module, after the first sending module 802 sends the data frame carrying the transmission resource request, start timing, if the preset is exceeded After the maximum waiting frame interval, the receiving module 803 still does not receive the transmission resource request response, and the current resource request fails.
  • the triggering encapsulation module 801 when the data frame is transmitted, carries the transmission resource request to the data. In the frame, the resource request is re-initiated.
  • the embodiment of the present invention further provides a CAP for implementing a path resource request, as shown in FIG. 9, the method includes: a receiving module 901, configured to receive a transmission resource a requesting data frame; a parsing module 902, configured to parse the transmission resource request from the data frame; and a resource allocation module 903, configured to allocate a transmission resource to the corresponding STA according to the transmission resource request;
  • the sending module 904 is configured to send a transmission resource request response to the corresponding STA, where the transmission resource request response carries a transmission resource indication.
  • the data frame may further include a path request indication for indicating the presence of the transmission resource request.
  • the parsing module 902 can know the existence of the transmission resource request by parsing the path request indication in the data frame.
  • a field is set in the frame header of the data frame, and the value of the field indicates the existence of the transmission resource request.
  • the parsing module 902 can obtain the path request indication by parsing the path request indication field in the frame header of the data frame.
  • the transmission resource request is carried in a frame body of the data frame.
  • the parsing module 902 can obtain the transmission resource request by parsing a frame body of the data frame.
  • a field is set in the frame body of the data frame, and the transmission resource request is carried.
  • the parsing module 902 can obtain the transmission resource request by parsing a path resource request field in a frame body of the data frame.
  • the transmission resource request may be based on a service flow reporting resource request: that is, the transmission resource request includes an identifier of one or more service flows, and a size of a bandwidth resource requested for each service flow.
  • the transmission resource request may further include a type of bandwidth resource requested for each service flow.
  • the type of the bandwidth resource may include: an incremental bandwidth, used to indicate that when the transmission resource is allocated for the service flow, the service is increased or decreased based on the size of the allocated bandwidth resource for the service flow.
  • the total bandwidth is used to indicate that the size of the bandwidth resource requested by the service flow is replaced by the bandwidth resource allocated by the service flow when the transmission resource is allocated for the service flow.
  • the transmission resource request may be based on a STA reporting resource request: that is, the transmission resource request includes a size of a total bandwidth resource required by the STA that initiates the transmission resource request.
  • the transmission resource request may further include a type of the bandwidth resource.
  • the type of the bandwidth resource may include: an incremental bandwidth, used to indicate that when the transmission resource is allocated to the STA, the STA is added or decreased based on the size of the allocated bandwidth resource for the STA.
  • the size of the requested bandwidth resource ; the total bandwidth is used to indicate that the size of the bandwidth resource requested by the STA is replaced by the bandwidth resource size allocated by the STA when the transmission resource is allocated to the STA.
  • the transmission resource request includes an identifier of the STA that sends the transmission resource request, and the transmission resource request response carries an identifier of the STA.
  • the size of the bandwidth resource may be indicated by an index in a preset resource table.
  • the preset resource table includes a resource table of multiple precision ranges.
  • the sending module 904 may send the transmission resource request response to the corresponding STA on a transmission control channel.
  • the sending module 904 may send the transmission resource request response to the corresponding STA in a unicast manner.
  • the embodiment of the present invention further provides a system for implementing a path resource request, including the STA and the CAP as described above, and interacting with each other to fully utilize data transmission.
  • the timing and resources to complete the resource request process by way of the way.
  • the embodiment of the present invention further provides a method for allocating resources.
  • the CAP actively allocates resources for sending resource requests to at least one STA by polling.
  • the method includes the following steps: Step S1001: CAP polls at least one STA, allocates a first transmission resource for each polled STA;
  • Step S1002 The CAP sends a first transmission resource indication to the polled STA.
  • Step S1004 The STA sends a transmission resource request by using the first transmission resource.
  • Step S1006 The CAP sends a transmission resource request response to the corresponding STA, and the transmission resource request response carries a second transmission resource indication.
  • Step S1007 The STA receives the transmission resource request response.
  • Step S1008 The STA sends data by using the second transmission resource.
  • the CAP uses the polling mode to actively allocate the first transmission resource to the STA, so that the STA can use the first transmission resource to initiate the resource request, which is a good solution for how to obtain and send when requesting the uplink data transmission resource.
  • the CAP can poll the STA according to a preset polling policy:
  • polling parameters such as polling order, polling interval, resource allocation condition, etc.
  • the resource allocation condition is set to allocate resources to all polled STAs.
  • the polling policy may also be set to: determine whether there is currently a transmission resource available for allocation; when there is currently a transmission resource available for allocation, the polling step is started. Therefore, when there are transmission resources available for allocation, the CAP actively allocates transmission resources to the STA, and does not need the STA to request again, which reduces the interaction process in the resource request process, and can improve the overall resource request speed of the system.
  • the CAP may trigger the determination of the currently assignable bandwidth resource according to a predetermined rule, for example, may be periodically determined, judged in real time, or judged when certain conditions are met, and the present invention is not limited herein.
  • the CAP may send the first transmission resource indication to the STA in a unicast manner.
  • the CAP may send a resource allocation indication by using a transmission control channel. That is, the CAP may send a first transmission resource indication on the transmission control channel.
  • the STA will receive the first transmission resource indication on the transmission control channel, and learn from it the first transmission resource allocated thereto.
  • the first transmission resource indication may be sent through other channels, and the present invention is not limited herein.
  • the embodiment of the present invention provides a format for transmitting a resource request, and supports reporting the requested resource based on the service flow.
  • the transmission resource request includes an identifier of the STA that initiates the transmission resource request, an identifier of one or more service flows, and a size of the bandwidth resource requested for each service flow.
  • the CAP can learn the service flows of the STA and the resource requirements of the service flows by parsing the transmission resource request.
  • the transmission resource request may further include a type of bandwidth resource requested for each service flow.
  • the CAP supports the STA to select the requested bandwidth resource type for different service flows as needed, and the resource request is more flexible and more user-friendly.
  • the type of the optional bandwidth resource may include: an incremental bandwidth, configured to indicate, when the second transmission resource is allocated for the service flow, increase or decrease the service flow based on the allocated bandwidth resource size of the service flow. The size of the bandwidth resource for this request.
  • the total bandwidth is used to indicate that the size of the bandwidth resource that is requested by the service flow is replaced by the size of the bandwidth resource that is allocated by the service flow when the second transmission resource is allocated for the service flow.
  • the embodiment of the present invention further provides another format for transmitting a resource request, and supports the resource requested by the STA to report.
  • the transmission resource request includes an identifier of the STA that initiates the transmission resource request, and a size of the total bandwidth resource required by the STA.
  • the transmission resource request may further include a type of bandwidth resource requested by the STA.
  • the CAP supports the STA to select the requested bandwidth resource type according to the needs, and the resource request is more flexible and more user-friendly.
  • the types of optional bandwidth resources can include:
  • An incremental bandwidth configured to increase or decrease the size of the bandwidth resource requested by the STA according to the size of the bandwidth resource allocated by the STA, when the second transmission resource is allocated to the STA;
  • the total bandwidth is used to indicate that the size of the bandwidth resource requested by the STA is replaced by the bandwidth resource size allocated by the STA when the second transmission resource is allocated to the STA.
  • the embodiment of the present invention further provides a bandwidth resource representation method.
  • a resource table see Table 3
  • the bandwidth resource is indexed in a preset resource table to indicate the size of the requested bandwidth resource. . Therefore, when the required bandwidth resource is reported, only the bandwidth resource needs to be carried, and the index value in the resource table is required to be carried, and when the requested bandwidth resource is large, the index value is used instead of the specific bandwidth resource value, which is Reduce the occupied bits and save transmission resources.
  • a resource table of various precision ranges can be designed as needed.
  • an appropriate resource table may be selected according to the requested resource, and the resource request carries an identifier and an index of the resource table, and the CAP side maintains the same resource table according to the resource table in the received resource request.
  • the identifier and the index are located to the resource size of the corresponding index in the corresponding resource table, so as to know the size of the resource requested by the STA.
  • the transmission resource request may be sent in a resource request frame and sent.
  • a specific resource request frame structure is provided by using the foregoing method for reporting a service flow, as shown in FIG. 4, including a frame header, a frame body, and an FCS.
  • the frame header contains frame control information, such as frame type (here, management control), subtype (here, independent resource request frame), version information, etc.; frame body contains STAID, FID number, and one or more FID information block, which includes a service flow identifier and a resource index in each FID information block.
  • the resource index is the index of the requested bandwidth resource in the resource table.
  • information indicating the resource type of the service flow request may also be set in the bandwidth resource request information of the service flow.
  • the STAID field of the frame designing the independent resource request frame occupies 12 bits
  • the FID number field occupies 4 bits
  • the FCS field occupies 32 bits
  • each FID information block occupies 16 bits, which in turn is a 4-bit FID field and a 4-bit reservation.
  • Field, 7bit resource index field and lbit reserved field is a 4-bit FID field and a 4-bit reserved field.
  • the CAP may send the transmission resource request response in a unicast manner, where the second transmission resource indication is carried.
  • the STA receives a corresponding response according to a preset rule.
  • STAID is used as the basis for correct reception, that is, STA
  • the transmission resource request carries its own STAID
  • the CAP when the CAP returns a transmission resource request response for the STA, the CAP also carries the STAID of the STA in the transmission resource request response, and the STA determines the received transmission resource request response by determining. Whether or not to carry its own STAID to determine whether the corresponding response is correctly received.
  • the CAP may send a transmission resource request response by using a transmission control channel, where the second transmission resource indication is carried.
  • the STA will receive the transmission resource request response on the transmission control channel, and learn from it the second transmission resource allocated thereto.
  • the transmission resource request response may be sent through other channels, such as a downlink transmission channel, and the present invention is not limited herein.
  • the embodiment of the present invention further provides a CAP for implementing resource allocation.
  • the method includes: a first resource allocation module 1101, configured to poll at least one STA, for each The polled STA allocates the first transmission resource; the first sending module 1102 is configured to send the first transmission resource indication to the polled STA, and the second resource allocation module 1103 is configured to receive the transmission resource request, corresponding to The STA allocates a second transmission resource; the second sending module 1104 is configured to send a transmission resource request response to the corresponding STA, where the transmission resource request response carries a second transmission resource indication;
  • the first transmission resource is used by the STA to send a transmission resource request
  • the second transmission resource is used by the STA to send data.
  • the second resource allocation module 1103 supports processing of resource requests reported based on service flows.
  • the resource request based on the service flow report includes: the transmission resource request includes an identifier of the STA, an identifier of one or more service flows, and a size of the bandwidth resource requested for each service flow.
  • the second resource allocation module 1103 can learn the service flows of the STA and the resource requirements of the service flows by parsing the transmission resource request.
  • the transmission resource request may further include a type of bandwidth resource requested for each service flow.
  • the second resource allocation module 1103 supports the STA to select the requested bandwidth resource type for different service flows as needed, and the resource request is more flexible and more user-friendly.
  • the type of the optional bandwidth resource may include: an incremental bandwidth, configured to indicate, when the second transmission resource is allocated for the service flow, increase or decrease the service flow based on the allocated bandwidth resource size of the service flow. The size of the bandwidth resource for this request.
  • the total bandwidth is used to indicate that the size of the bandwidth resource that is requested by the service flow is replaced by the size of the bandwidth resource that is allocated by the service flow when the second transmission resource is allocated for the service flow.
  • the second resource allocation module 1103 further supports processing on a resource request reported by the STA.
  • the resource request based on the STA report includes: the transmission resource request includes an identifier of the STA that initiates the transmission resource request, and a size of the total bandwidth resource required by the STA.
  • the second resource allocation module 1103 can obtain the total resource requirement of the STA by parsing the transmission resource request.
  • the transmission resource request may further include a type of bandwidth resource required by the STA.
  • the second resource allocation module 1103 supports the STA to select the requested bandwidth resource type according to requirements, and the resource request is more flexible and more user-friendly.
  • the types of optional bandwidth resources can include:
  • An incremental bandwidth configured to increase or decrease the size of the bandwidth resource requested by the STA according to the size of the bandwidth resource allocated by the STA, when the second transmission resource is allocated to the STA;
  • the total bandwidth is used to indicate that the size of the bandwidth resource requested by the STA is replaced by the bandwidth resource size allocated by the STA when the second transmission resource is allocated to the STA.
  • the size of the requested bandwidth resource may be indicated by an index of the bandwidth resource in a preset resource table.
  • the preset resource table includes a resource table of multiple precision ranges.
  • the first sending module 1102 may send the first transmission resource indication on a transmission control channel.
  • the first sending module 1102 may send the first transmission resource indication in a unicast manner.
  • the second sending module 1104 may send the transmission resource request response on a transmission control channel.
  • the second sending module 1104 may send the transmission resource request response in a unicast manner.
  • the CAP may further include: a determining module 1105, configured to determine whether a transmission resource is currently available for allocation, and if the current transmission resource is available for allocation, send a resource allocation instruction to the first resource allocation module 1101. .
  • the first resource allocation module 1101 after receiving the resource allocation instruction, performs a polling process.
  • the embodiment of the present invention further provides another method for resource allocation, where the CAP actively allocates resources for sending data to the STA, as shown in FIG. 12, including the steps: Step S1201: The CAP polls at least one STA, and allocates a first transmission resource for each polled STA.
  • Step S1202 The CAP sends a first transmission resource indication to the polled STA.
  • Step S1203 The STA receives the first transmission resource indication.
  • Step S1204 The STA sends data by using the first transmission resource.
  • the difference from the resource allocation method in the third embodiment is that the CAP allocates the STA polling allocation directly as the resource for transmitting data, and does not require the STA to re-initiate the resource request to obtain the resource for transmitting the data.
  • the embodiment of the present invention further provides a CAP for implementing resource allocation. As shown in FIG. 13, the method includes:
  • a first resource allocation module 1301 configured to poll at least one STA, and allocate a first transmission resource to each of the polled STAs.
  • the first sending module 1302 is configured to send the first transmission resource indication to the polled STA; the first transmission resource is used by the STA to send data.
  • the first sending module 1302 may send the first transmission resource indication on a transmission control channel.
  • the first sending module 1302 may send the first transmission resource indication in a unicast manner.
  • the CAP may further include: a determining module 1303, configured to determine whether a transmission resource is currently available for allocation, and if the current transmission resource is available for allocation, send a resource allocation instruction to the first resource allocation module 1301. .
  • the first resource allocation module 1301 performs polling processing after receiving the resource allocation instruction.
  • the embodiment of the present invention further provides a method for resource allocation.
  • the CAP actively allocates resources for sending a resource request to at least one STA by polling.
  • the method includes the following steps: Step S 1401: CAP polling At least one STA, allocates a first transmission resource for each STA that is polled and reaches its resource allocation period;
  • Step S1402 The CAP sends a first transmission resource indication to the polled STA.
  • Step S1403 The STA receives a first transmission resource indication.
  • Step S1404 The STA sends a transmission resource request by using the first transmission resource.
  • Step S1405 The CAP receives the transmission resource request, and allocates a second transmission resource to the corresponding STA.
  • Step S1406 The CAP sends a transmission resource request response to the corresponding STA, and the transmission resource request response carries a second transmission resource indication.
  • Step S1407 The STA receives the transmission resource request response.
  • Step S1408 The STA sends data by using the second transmission resource.
  • the foregoing embodiment of the present invention increases the monitoring of the STA resource allocation period based on the polling allocation scheme of the third embodiment, and preferentially allocates resources to the STAs that have reached the resource allocation period, thereby making the resource allocation more reasonable.
  • the CAP maintains the resource allocation period of the STA. After allocating the first transmission resource to the STA, the resource allocation period is recalculated for the STA to which the first transmission resource is allocated.
  • the CAP may use a timer to maintain a resource allocation period of the STA. If the timer expires, the STA is configured to allocate a resource to the STA, and restarts the timer. If the timeout is exceeded, the STA is not yet configured to allocate resources.
  • the resource allocation period of the STA is calculated according to the current service type parameter of the STA.
  • the service type parameters include parameters such as priority, delay budget, and packet loss rate budget. Therefore, it can be set according to the actual needs of the business, and the purpose of meeting the business requirements is to make the allocation of resources more reasonable.
  • the embodiment of the present invention further provides a CAP for implementing resource allocation.
  • the method includes:
  • the first resource allocation module 1501 is configured to poll at least one STA, and allocate a first transmission resource for each STA that is polled and reaches its resource allocation period;
  • the first sending module 1502 is configured to send the first transmission resource indication to the polled STA
  • the second resource allocation module 1503 is configured to receive a transmission resource request, and allocate a second transmission resource to the corresponding STA.
  • the module 1504 is configured to send a transmission resource request response to the corresponding STA, where the transmission resource request response carries a second transmission resource indication, where the first transmission resource is used by the STA to send a transmission resource request.
  • the second transmission resource is used by the STA to send data.
  • the first resource allocation module 1501 further recalculates a resource allocation period for the STA to which the first transmission resource is allocated.
  • the first resource allocation module 1501 may use a timer to maintain a resource allocation period of the STA. If the timer expires, the STA is configured to allocate a resource for the STA, and restarts the resource. If the timer does not expire, the STA is considered to have not reached the configured resource allocation period, and the STA is not allocated resources.
  • the first resource allocation module 1501 may calculate a resource allocation period of the STA according to the current service type parameter of the STA.
  • the service type parameter includes parameters such as a priority, a delay budget, and a packet loss rate budget.
  • the second resource allocation module 1503 supports processing of resource requests reported based on service flows.
  • the resource request based on the service flow report includes: the transmission resource request includes an identifier of the STA, an identifier of one or more service flows, and a size of a bandwidth resource required by each service flow.
  • the second resource allocation module 1503 can learn the service flows of the STA and the resource requirements of the service flows by parsing the transmission resource request.
  • the transmission resource request may further include a type of bandwidth resource requested for each service flow.
  • the second resource allocation module 1503 supports the STA to select the requested bandwidth resource type for different service flows as needed, and the resource request is more flexible and more user-friendly.
  • the type of the optional bandwidth resource may include: an incremental bandwidth, configured to indicate, when the second transmission resource is allocated for the service flow, increase or decrease the service flow based on the allocated bandwidth resource size of the service flow. The size of the bandwidth resource for this request.
  • the total bandwidth is used to indicate that the size of the bandwidth resource requested by the service flow is replaced by the bandwidth resource allocated by the service flow when the second transmission resource is allocated for the service flow.
  • the second resource allocation module 1503 further supports processing of resource requests based on STA reporting.
  • the resource request based on the STA report includes: the transmission resource request includes an identifier of a STA that initiates the transmission resource request, and a size of a total bandwidth resource required by the STA.
  • the second resource allocation module 1503 can obtain the total resource requirement of the STA by parsing the transmission resource request.
  • the transmission resource request may further include a type of bandwidth resource required by the STA.
  • the second resource allocation module 1503 supports the STA to select the requested bandwidth resource type according to requirements, and the resource request is more flexible and more user-friendly.
  • the types of optional bandwidth resources can include:
  • An incremental bandwidth configured to increase or decrease the size of the bandwidth resource requested by the STA according to the size of the bandwidth resource allocated by the STA, when the second transmission resource is allocated to the STA;
  • the total bandwidth is used to indicate that the STA is allocated the second transmission resource, and the STA is used this time.
  • the size of the requested bandwidth resource is replaced by the bandwidth resource size allocated by the STA.
  • the size of the requested bandwidth resource may be indicated by an index in a preset resource table.
  • the preset resource table includes a resource table of multiple precision ranges.
  • the first sending module 1502 may send the first transmission resource indication on a transmission control channel.
  • the first sending module 1502 may send the first transmission resource indication in a unicast manner.
  • the second sending module 1504 may send the transmission resource request response on a transmission control channel.
  • the second sending module 1504 may send the transmission resource request response in a unicast manner.
  • the CAP may further include: a determining module 1505, configured to determine whether a transmission resource is currently available for allocation, and if the current transmission resource is available for allocation, send a resource allocation instruction to the first resource allocation module 1501. .
  • the first resource allocation module 1501 performs polling processing after receiving the resource allocation instruction.
  • the embodiment of the present invention further provides a method for resource allocation.
  • the CAP actively allocates resources for sending data to the STA, as shown in FIG.
  • Step S1601 The CAP polls at least one STA, and allocates a first transmission resource for each STA that is polled and reaches its resource allocation period;
  • Step S 1602 The CAP sends a first transmission resource indication to the polled STA.
  • Step S1603 The STA receives the first transmission resource indication.
  • Step S1604 The STA sends data by using the first transmission resource.
  • the difference from the resource allocation method in the fifth embodiment is that the CAP allocates the STA polling allocation directly as the resource for transmitting data, and does not require the STA to re-initiate the resource request to obtain the resource for transmitting data.
  • the embodiment of the present invention further provides a CAP for implementing resource allocation.
  • the method includes: a first resource allocation module 1701, configured to poll at least one STA, for each Polled STA Allocating a first transmission resource; the first sending module 1702 is configured to send a first transmission resource indication to the polled STA; the first transmission resource is used by the STA to send data.
  • the first resource allocation module 1701 further recalculates a resource allocation period for the STA to which the first transmission resource is allocated.
  • the first resource allocation module 1701 may use a timer to maintain a resource allocation period of the STA. If the timer expires, the STA is considered to have reached the configured resource allocation period, allocate resources for the STA, and restart the If the timer does not expire, the STA is considered to have not reached the configured resource allocation period, and the STA is not allocated resources.
  • the first resource allocation module 1701 may calculate a resource allocation period of the STA according to the current service type parameter of the STA.
  • the service type parameter includes parameters such as a priority, a delay budget, and a packet loss rate budget.
  • the first sending module 1702 may send the first transmission resource indication on a transmission control channel.
  • the first sending module 1702 may send the first transmission resource indication in a unicast manner.
  • the CAP may further include: a determining module 1703, configured to determine whether a transmission resource is currently available for allocation, and if the current transmission resource is available for allocation, send a resource allocation instruction to the first allocation module.
  • the first allocating module performs polling after receiving the resource allocation instruction.
  • first to sixth embodiments of the present invention provide several ways for a STA to acquire resources required for uplink transmission data, including: a contention request method (first embodiment), and a path resource request method (second implementation) Example), polling allocation method (third to sixth embodiments).
  • the contention request method and the associated resource request mode are all initiated by the STA, wherein: the contention request method is obtained by the STA actively requesting resources through the competition mode, and is applicable to the non-uplink transmission resource available.
  • the resource request information is carried by the STA in the data frame, and is sent along with the uplink transmission data, and is more suitable for the scenario where the data is currently transmitted in the uplink, which can reduce the number of interactions of the resource request and improve the overall system. Resource allocation speed.
  • the polling allocation method provides a way for the CAP to actively allocate resources to the STA.
  • the STA can actively analyze the resources and allocate resources to the STAs when available. This can reduce the number of interactions of resource requests and improve the overall system. Resource allocation speed. Therefore, if we can reasonably combine these three resource allocation methods according to specific scenarios, we will achieve better results.
  • Embodiments of the present invention provide a reasonable combination of the following, as follows: When the CAP has available resources, the CAP will actively allocate resources to the STA. After the CAP learns the resources allocated by the CAP, the STA may use the uplink transmission resource to send a resource request, or directly send data.
  • the STA When the CAP does not allocate resources for the STA, Currently, there is no uplink transmission resource, and the STA is suitable to initiate a resource request by using a contention method. If there is currently an uplink transmission resource, it is suitable to use the path-by-path method to carry the resource request in the data frame and send it out.
  • the resource required for the CAP to allocate data for uplink transmission to the STA is implemented based on the STAID, that is, the CAP calculates the resource allocated to the STA according to the resource requested by the STA (based on the FID request or based on the STA request).
  • the total resources are allocated to the STAs by the STA side. That is, after the STA knows the total resources allocated to it, the STAs perform secondary allocation between the service flows through internal scheduling.
  • the transmission resource is allocated between the plurality of service flows, and then the plurality of service flows are controlled to transmit data on the corresponding transmission resources.
  • the manner in which the resources are allocated between the service flows may be set as needed, for example, according to priority allocation, equalization, etc., and the present invention is not limited herein.
  • the operation on the CAP side is centralized, and the STA side shares part of the resource allocation work.
  • the overall resource allocation speed of the system can be greatly improved, and the STA can design resources according to requirements.
  • the assigned policies, such as setting the service priority, make the resource allocation more flexible, can meet the needs of different users, and the user experience is better.
  • the STA learns the resources allocated thereto, it also determines whether the allocated resource meets the requirement, and if the requirement is met, uses the transmission resource to send the data to be sent, and if the requirement is not met, the The transmission resource sends part of the data in the to-be-sent data, and performs the resource request again according to the currently required bandwidth resource.
  • the resource request is executed again, since there is uplink data transmission, it is preferable to implement the resource request by using the path resource request method.
  • the allocated resources may be compared with the requested resources to determine whether the requirements are met. If the allocated resources are smaller than the requested resources, the requirements are deemed not to be met, otherwise, the requirements are deemed to be met.
  • the STA if the STA fails to receive the corresponding response within a preset time range after sending the request message, the STA considers that the current request fails, and the resource request is executed again.
  • the embodiment of the present invention implements timing by means of frame counting, so that the timing is more accurate and the processing is more timely: when the resource is requested by the contention request method, the CAP receives the second transmission resource request, An acknowledgement (ACK) message is also returned to inform the STA that the second transmission resource request has been received.
  • ACK acknowledgement
  • the STA After the first transmission resource request is sent, the STA does not receive the first transmission resource request response after the first maximum waiting frame interval is exceeded, and the current resource request fails, and the resource request needs to be re-requested; or After the second transmission resource request is sent, if the second transmission resource request response is not received after the preset second maximum waiting frame interval is exceeded, the current resource request is considered to be failed, and the resource request needs to be re-requested.
  • the resource request is implemented by the path resource request method, after the data frame carrying the resource request information is sent, if the corresponding response is not received after the preset third maximum waiting frame interval is exceeded, the current request is considered. If it fails, the resource request will be executed again.
  • the specific method of performing the resource request again may be determined according to the current scenario. If there is no uplink transmission resource, the STA is suitable to initiate the resource request by using the contention method; if there is currently an uplink transmission resource, it is suitable to use the path request to request the resource.
  • the bearer is sent out in the data frame. It is understood that the specific order or hierarchy of steps in the process disclosed is an example of the exemplary method. Based on a design preference, it is understood that a particular order or hierarchy of steps in the process can be rearranged without departing from the scope of the disclosure.
  • the appended method claims set forth the elements of the various steps in the exemplary order and are not intended to In the above Detailed Description, various features are grouped together in a single embodiment to the present disclosure.

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Abstract

本发明提供了一种用于资源请求的方法、站点和中心接入点,该方法包括:将传输资源请求承载于数据帧中;发送所述携带传输资源请求的数据帧。该方法提供了一种获取上行传输数据所需的资源的解决方案。

Description

一种用于资源请求的方法、 站点和中心接入点 本申请要求申请日为 2011年 3月 31 日, 申请号为 201110081288.6, 发 明名称为一种无线通信方法的在先申请的优先权, 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在先申请的优先 权, 申请日为 2011年 7月 6 日, 申请号为 201110188594.X, 发明名称为一 种用于资源请求的方法、 装置及系统的在先申请的优先权, 申请日为 2012 年 2月 8 日, 申请号为 201210027898.2, 发明名称为一种用于资源请求的方 法和装置的在先申请的优先权, 以及申请日为 2012年 2月 21 日, 申请号为 201210041628.7, 发明名称为一种用于资源请求的方法、 站点和中心接入点 的在先申请的优先权, 所述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, 尤其涉及一种用于资源请求方法和装置。 背景技术
近年来, 无线网络技术有基于 802.11标准的无线局域网 WiFi技术、 基 于 802.15的蓝牙 Blu etooth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 IEEE 802.11 的 WiFi技术是当今使用最广的一种无线网络传输技 术。 主要应用于无线局 i或网环境, 应用场景以室内居多, 也可应用于室外环 境。 802.11系统由最初的基于 C D M A传输机制的 802.11 b演进为基于 OFDM 技术的 802.11 a和 802.11 g。 尽管在最新的 IEEE 802.11 n-2009标准中, 通 过引入多天线 (MIMO ) 技术使得 802.11 η物理层峰值速率可达 600Mbps, 但是通常媒体接入控制 ( MAC, Media ACess Control ) 层的呑吐仅仅最大 能达到 300Mbps。 所以对于传统的 WLAN 系统, 基于 CSMA/CA (载波侦 听 /冲突避免) 的单用户接入的 MAC层设计一直是网络性能的瓶颈。 所以, 尽管现有的 Wi-Fi技术在一定程度上为用户提供了低廉的用户接入方式, 但 是很难再适应当前以及未来的飞速发展的高速率的多媒体业务需求。
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 3G系统的 Femto技术釆用 CDMA传输机制, 面 向 LTE或 WiMAX系统的 Femto技术则釆用 OFDM传输机制。 其多址接入 机制通过时间、 频率、 码字为不同的用户分配相互正交的接入资源, 这与面 向竟争的 CSMA/CA随机多址接入有着本质不同。但是 Femto技术由面向移 动通信系统的 3G/LTE/WiMAX系统衍生而来。 由于 3G/LTE/WiMAX系统主 要面向广域覆盖的移动通信场景, 其系统特征对于中短距离无线通信场景并 不优化。 同时基于 3G/LTE/WiMAX比较复杂的上层协议设计和 PHY层对同 步等的严格要求,导致设备成本也不能做到像 802.11 的低廉,这也是 Femto 技术目前一直没被广泛应用的重要原因之一 。 面对日益飞速发展的多媒体业务应用需求, 为了更好地满足无线通信需 求, 需要提出更加适用的实现方案。 发明内容
本发明要解决的技术问题是, 提供一种用于资源请求的方法、 站点和中 心接入点, 用以请求上行传输数据所需的资源。 为了解决上述技术问题, 本发明提出一种用于资源请求的方法, 用于以 随路方式发起资源请求, 包括: 将传输资源请求承载于数据帧中;
发送所述携带传输资源请求的数据帧。
为了解决上述技术问题, 本发明还提出一种用于资源请求的方法, 用于 处理以随路方式发起的资源请求, 包括: 接收携带传输资源请求的数据帧;
从所述数据帧中解析出所述传输资源请求; 根据所述传输资源请求, 为对应的站点(STA)分配传输资源;
发送传输资源请求应答给所述对应的 STA, 所述传输资源请求应答中携 带传输资源指示。
为了解决上述技术问题, 本发明提出一种用于资源请求的 STA, 用于以 随路方式发起资源请求, 包括:
封装模块, 用于将传输资源请求承载于数据帧中; 第一发送模块, 用于发送所述携带传输资源请求的数据帧。
为了解决上述技术问题, 本发明还提出一种用于资源请求的中心接入点 (CAP), 包括: 接收模块, 用于接收携带传输资源请求的数据帧; 解析模块, 用于从所述数据帧中解析出所述传输资源请求;
资源分配模块, 用于根据所述传输资源请求, 为对应的站点 STA分配传 输资源;
发送模块, 用于发送传输资源请求应答给所述对应的 STA, 所述传输资 源请求应答中携带传输资源指示。
本发明提供的一种用于资源请求的方法、 站点和中心接入点, 用以获取 上行传输数据所需的资源。 附图说明 图 1是本发明第一实施例一种资源请求的方法流程图;
图 2是本发明实施例调度请求序列生成方法流程示意图;
图 3是本发明实施例 PN序列生成器原理示意图; 图 4是本发明实施例独立资源请求帧结构示意图;
图 5是用于实现第一实施例的竟争资源请求的 STA装置方框图; 图 6是用于实现第一实施例的竟争资源请求的 CAP装置方框图; 图 7是本发明第二实施例一种随路资源请求的方法流程图; 图 8是用于实现第二实施例的随路资源请求的 STA装置方框图; 图 9是用于实现第二实施例的随路资源请求的 CAP装置方框图; 图 10是本发明第三实施例一种轮询资源请求的方法流程图;
图 11是用于实现第三实施例的轮询资源请求的 CAP装置方框图; 图 12是本发明第四实施例一种轮询资源请求的方法流程图; 图 13是用于实现第四实施例的轮询资源请求的 CAP装置方框图; 图 14是本发明第五实施例一种轮询资源请求的方法流程图; 图 15是用于实现第五实施例的轮询资源请求的 CAP装置方框图; 图 16是本发明第六实施例一种轮询资源请求的方法流程图;
图 17是用于实现第六实施例的轮询资源请求的 CAP装置方框图。
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。 第一实施例
本发明实施例提供了一种资源请求的方法, 由需要上行传输数据的站点
(Station,筒称 STA)主动向中心接入点 ( Central Access Point ,筒称 CAP )发起 传输资源请求, 通过竟争方式获取上行传输资源。 其中, CAP 是为接入的 STA提供访问服务的实体; STA是具有媒体接入控制 (MAC)和物理层( PHY ) 功能接口, 能与 CAP通信的终端设备。本发明实施例资源请求方法具体如图 1所示, 包括步骤: 步骤 S101: STA发送第一传输资源请求;
步骤 S102: CAP接收所述第一传输资源请求, 为所述 STA分配第一传 输资源;
步骤 S103: 所述 CAP发送第一传输资源请求应答给所述 STA, 所述第 一传输资源请求应答中携带第一传输资源指示;
步骤 S104: 所述 STA接收所述第一传输资源请求应答; 步骤 S105: 所述 STA利用所述第一传输资源发送第二传输资源请求; 步骤 S106: 所述 CAP接收所述第二传输资源请求, 为所述 STA分配第 二传输资源;
步骤 S107: 所述 CAP发送第二传输资源请求应答给所述 STA, 所述第 二传输资源请求应答中携带第二传输资源指示;
步骤 S108: 所述 STA接收所述第二传输资源请求应答; 步骤 S109: 所述 STA利用所述第二传输资源发送数据。 本发明实施例上述资源请求的方法, 由 STA主动向 CAP发起传输资源 请求, 通过两次交互, 即先发起第一传输资源请求, 触发资源请求进程, 请 求到第一传输资源, 再利用第一传输资源发送第二传输资源请求, 请求到用 于上行传输数据的第二传输资源, 从而完成整个资源请求过程, 获得上行传 输数据所需的资源。
较佳地, 所述第一传输资源请求可以通过上行调度方式发起。 当然, 在 另一实施例中, 所述第一传输资源请求也可以釆用其他方式发起, 例如利用 空闲的上行传输资源发起, 或者承载于上行数据帧中随数据帧发送出去以发 起, 等等, 本发明在此不做限制。 下面将对本发明实施例釆用调度方式发起 第一传输资源请求的方式做进一步说明。
所述第一传输资源请求具体可以为一调度请求序列。 CAP接收到作为第 一传输资源请求的调度请求序列后, 在第一传输资源请求应答中携带所述调 度请求序列的索引、 所述调度请求序列的频域循环移位索引、 所述调度请求 序列在上行调度请求信道的发送位置和所述调度请求序列发送的系统帧号。 STA才艮据发送调度请求序列时使用的调度请求序列的索引、 所述调度请求序 列的频域循环移位索引、 所述调度请求序列在上行调度请求信道的发送位置 和所述调度请求序列发送的系统帧号作为判断依据, 接收所述调度请求序列 对应的第一传输资源请求应答。
当然, 在另一实施例中, 所述第一传输资源请求也可以釆用其他形式, 本发明在此不故限制。 下面将对本发明实施例设计调度请求序列作为第一传 输资源请求的方式进行说明。
可以预先设计多个可作为第一传输资源请求的调度请求序列, STA在发 起第一传输资源请求时, 可以按照预定的规则, 从所述多个调度请求序列选 择一个作为第一传输资源请求。 选择方式可以根据需要设置, 例如等概率选 择方式, 等等。
在设计调度请求序列的标识时, 可以对可选作第一传输资源请求的多个 调度请求序列编号, 以调度请求序列的序号作为所述调度请求序列的标识, 所述编号可以为索引形式。 当然, 也可以以其他方式来标识不同的调度请求 序列, 本发明在此不故限制。 本发明实施例还给出了一种生成调度请求序列的具体方法,如图 2所示, 依次包括步骤: 生成 PN序列、 星座映射、 子载波映射、 生成循环移位序列、 'f夹速傅立叶逆变换 (Inverse Fast Fourier Transform,筒称 FFT)、力口 CP。图 2中,
CAP— MAC指 CAP的 MAC地址的最低 7比特, 为 PN序歹' J索引( 0≤ < 4 ), f^cs }为循环移位参数集, 】为循环移位参数索引 ( 0≤ < 8 )。 生成 PN序列步骤, 可釆用如图 3所示方式实现。 即, PN序列釆用生 成多项式为 1 + X11 + X15的最大长度线性反馈移位寄存器序列。寄存器的初始值
^ = [00101011¾¾¾¾], , MSB 在 左 , LSB 在 右 ; 其 中 [r6r5r4r3r2riroL = CAP MAC, 是 CAP的 MAC地址的最 4氐 7比特。 星座映射步骤,可以釆用 BPSK调制方式。如表 1所示,序列 Λ '经 BPSK 调制后, 得到序列 e'。 表 1
Figure imgf000007_0001
Figure imgf000008_0001
子载波映射步骤, 可以按照下式, 将序列 ·按照下式进行子载波映射, 得到序列 0
Figure imgf000008_0002
生成循环移位序列步骤,可以对子载波映射后的序列 M '按照下式循环移 位, 得到序列 。
Figure imgf000008_0003
N N
] ^ j- IFFT 丄、 IFFT i] .
式中: 为 I FFT的点数, 2 ' 2 , δ 为循环移位参数, 单位为釆样点个数。对于 20 M Hz系统,
Figure imgf000008_0004
, {0 32 64 96 1 28 1 60 192 224}。 之后, 对循环移位序列 ' 进行 I FFT和加 CP处理后, 得到调度请求序 列。 釆用该方法将获得 32 个调度请求序列。 之后, 即可利用所述调度请求 序列发起竟争资源请求了。
当然, 在另一实施例中, 也可以釆用其他方式生成调度请求序列, 本发 明在此不故限制。 之后, STA将所述第一传输资源请求可以在上行调度请求信道上发送出 去' 本发明实施例巧妙地通过上行调度请求信道发起第一传输资源请求, 通 过竟争方式实现本发明实施例资源请求过程, 从而无需监听上行传输信道是 否有资源可用, 即使在没有上行传输资源的情况下, 也可以进行资源请求。 当然, 在另一实施例中, 所述第一传输资源请求也可以通过其他信道发起, 例如利用上行传输信道, 本发明在此不做限制。 本发明实施例在上行调度请求信道发起第一传输资源请求, 可设计以所 述调度请求序列对应于上行调度请求信道的 OFDM 符号的位置标识所述调 度请求序列的发送位置。 当然, 在另一实施例中, 也可以以其他方式来标识 调度请求序列的发送位置, 本发明在此不故限制。 在上行调度请求信道发起第一传输资源请求时, 可以根据需要, 釆用例 如 BPSK、 QPSK等方式将第一传输资源请求调制到一上行调度请求信道上 发送出。
较佳地, 所述 CAP在为所述 STA分配第一传输资源后, 可以通过传输 控制信道下发资源分配指示。 即, 所述 CAP可以在传输控制信道上发送第一 传输资源请求应答, 其中携带第一传输资源指示。 相应地, 所述 STA将会在 所述传输控制信道上接收到所述第一传输资源请求应答, 从中获知为其分配 的第一传输资源。 当然, 在另一实施例中, 也可以设计通过其他信道下发所 述第一传输资源请求应答, 本发明在此不做限制。
较佳地, 所述 CAP在为所述 STA分配第一传输资源后, 可以以广播的 方式发送所述第一传输资源请求应答。 釆用广播方式发送第一传输资源请求 应答时, 所述 STA将根据预设的规则, 接收对应的应答。 STA釆用调度请求 序列触发上行资源请求时, 可以才艮据发送调度请求序列时使用的调度请求序 列的索引、 所述调度请求序列的频域循环移位索引、 所述调度请求序列在上 行调度请求信道的发送位置和所述调度请求序列发送的系统帧号接收所述调 度请求序列对应的第一传输资源请求应答。
本发明实施例此处给出一种具体的第一传输资源请求应答的格式, 以作 说明, 参见表 2。
表 1资源请求帧资源分配 比特 定义
广播类型
b3b2b、b0
b 7b、b0 =<m0, 独立资源请求帧 (为独立资源请求帧分配资源) 预留
=00 , 对应 UL-SRCH第 1个 OFDM符号的调度请求 23 22 ' ' ' ¾ =01 , 对应 UL-SRCH第 2个 OFDM符号的调度请求 分配 1 = 10 , 对应 UL-SRCH第 3个 OFDM符号的调度请求
= 11 , 对应 UL-SRCH第 4个 OFDM符号的调度请求 b bm , PN序列索引, 域值: 0~3
Figure imgf000010_0001
较佳地, 本发明实施例提供了一种第二传输资源请求的格式, 支持基于 业务流上报所请求的资源。 其中, 所述第二传输资源请求中包括发起所述第 二传输资源请求的 STA的标识, 所述 STA为一个或者多个业务流中的每一 个业务流所请求的带宽资源的大小, 以及所述各业务流的标识。 CAP通过解 析所述第二传输资源请求, 可获知所述 STA的各业务流, 以及所述各业务流 的资源需求情况。
较佳地, 所述第二传输资源请求中还可以包括为每一个业务流所请求的 带宽资源的类型。 CAP 支持 STA根据需要为不同的业务流选择所请求的带 宽资源类型, 资源请求更为灵活, 更人性化。 可选的带宽资源的类型可以包括: 增量带宽, 用于指示为业务流分配第二传输资源时, 在为所述业务流已 分配的带宽资源大小的基础上, 增加或减少所述业务流本次请求的带宽资源 的大小。
总量带宽, 用于指示为业务流分配第二传输资源时, 使用所述业务流本 次请求的带宽资源的大小替换为所述业务流已分配的带宽资源大小。 较佳地, 本发明实施例还提供了另一种第二传输资源请求的格式, 支持 基于 STA上报所请求的资源。 其中, 所述第二传输资源请求中包括发起所述 第二传输资源请求的 STA的标识, 以及所述 STA请求的总的带宽资源的大 小。
较佳地,所述第二传输资源请求中还可以包括所述 STA需要的带宽资源 的类型。 CAP 支持 STA根据需要选择所请求的带宽资源类型, 资源请求更 为灵活, 更人性化。 可选的带宽资源的类型可以包括:
增量带宽, 用于指示为 STA分配第二传输资源时, 在为所述 STA 已分 配的带宽资源大小的基础上,增加或减少所述 STA本次请求的带宽资源的大 小;
总量带宽, 用于指示为 STA分配第二传输资源时, 使用所述 STA本次 请求的带宽资源的大小替换为所述 STA已分配的带宽资源大小。 较佳地, 本发明实施例还提供一种带宽资源的表示方法, 通过设计资源 表,以所述带宽资源在预设的资源表中索引来指示所请求的带宽资源的大小。 从而在上报需要的带宽资源时, 仅需要承载所述带宽资源对应于资源表中的 索引值即可, 尤其在请求的带宽资源较大时, 以索引值来替代具体的带宽资 源数值, 将大大减少所占用的比特位, 节约传输资源。 为了更直观, 下面给 出一种资源表示例, 如表 3所示。
表 3
Figure imgf000011_0001
Figure imgf000012_0001
II II II II II II II II II II II II II II II II II
Figure imgf000013_0001
II II II II II II
II II II II II II II II II II II II
55 1737< BS 〈=1792 119 229377< BS 〈=258048
56 1793< BS 〈=1904 120 258049< BS 〈=286720
57 1905< BS 〈=2016 121 28672K BS 〈=344064
58 2017< BS 〈=2128 122 344065< BS 〈=458752
59 2129< BS 〈=2240 123 458753< BS 〈=573440
60 224K BS 〈=2352 124 57344K BS 〈=802816
61 2353< BS 〈=2464 125 802817< BS 〈=1835008
62 2465< BS 〈=2576 126 1835009< BS 〈=3500000
63 2577< BS 〈=2688 127 BS 〉3500000
较佳地,可以根据需要设计多种精度范围的资源表。在执行资源请求时, 可根据所请求的资源选择合适的资源表, 在资源请求中携带资源表的标识和 索引, CAP侧维护同样的资源表, 根据接收到的资源请求中的资源表的标识 和索引, 定位到对应的资源表中对应索引的资源大小, 从而获知 STA所请求 的资源的大小。
本发明实施例中, 可以将所述第二传输资源请求封装为独立资源请求帧 的形式发送出去。 本发明实施例以上述基于业务流上报的方式为例, 给出了 一种具体的独立资源请求帧结构, 如图 4所示, 包括帧头、 帧体和帧校验序 列 (FCS )。 帧头中包含帧控制信息, 例如帧类型 (此处为管理控制)、 子类 型 (此处为独立资源请求帧)、 版本信息等; 帧体中包含 STAID、 FID个数, 以及一个或者多个 FID信息块,每个 FID信息块中包括业务流标识和资源索 引。 其中, 资源索引是所请求的带宽资源在资源表中的索引。 另外, 当可支 持分配不同类型的资源时, 例如支持增量和总量资源分配时, 还可以在所述 业务流的带宽资源请求信息中设置指示该业务流请求的资源类型的信息。
另外, 本发明设计独立资源请求帧的帧体中 STAID字段占用 12bit, FID 个数字段占用 4bit, FCS字段占 32bit, 其中每个 FID信息块占 16bit, 依次 是 4bit的 FID字段、 4bit的预留字段、 7bit的资源索引字段和 lbit的预留字 段。 从而实现了按字节读取, 筒化了处理。
若釆用上述基于 STA上 4艮的方式,则只需要改变图 4所示的独立资源请 求帧的帧体部分即可, 在帧体部分封装 STAID和资源索引。 另外, 若釆用多 种精度的资源表, 则还可以在帧体中设置资源表类型字段, 本发明实施例在 此不再赘述。 所述 CAP在为所述 STA分配第二传输资源后, 可以以单播的方式发送 所述第二传输资源请求应答, 其中携带第二传输资源指示。 所述 STA根据预 设的规则,接收对应的应答。 例如, 以 STAID作为正确接收的判断依据, 即, STA在第二传输资源请求中携带自身的 STAID, CAP在为所述 STA返回第 二传输资源请求应答时, 也会在所述第二传输资源请求应答中携带所述 STA 的 STAID, STA通过判断接收到的第二传输资源请求应答中是否携带其自身 的 STAID, 从而确定是否正确接收到对应的应答。
较佳地, 所述 CAP在为所述 STA分配第二传输资源后, 可以通过传输 控制信道下发资源分配指示。 即, 所述 CAP可以在传输控制信道上发送第二 传输资源请求应答, 其中携带第二传输资源指示。 相应地, 所述 STA将会在 所述传输控制信道上接收到所述第二传输资源请求应答, 从中获知为其分配 的第二传输资源。 当然, 在另一实施例中, 也可以设计通过其他信道下发所 述第二传输资源请求应答, 本发明在此不做限制。 较佳地, 发送第一传输资源请求后, 如果超过预设的第一最大等待帧间 隔后, 仍然没有收到第一传输资源请求应答, 则认为本次资源请求失败, 需 要重新进行资源请求; 或者, 发送第二传输资源请求后, 如果超过预设的第 二最大等待帧间隔后, 仍然没有收到第二传输资源请求应答, 则认为本次资 源请求失败, 需要重新进行资源请求。 本发明实施例监控应答返回的时间, 从而判断资源请求是否成功, 以便及时重新发起资源请求, 同时, 通过对帧 计数实现定时, 使得定时更精确, 处理更及时。
为了实现上述釆用竟争方式的资源请求方法, 本发明实施例还提供了一 种用于实现资源请求的 STA, 如图 5所示, 包括: 第一发送模块 501, 用于发送第一传输资源请求;
第一接收模块 502, 用于接收第一传输资源请求应答, 所述第一传输资 源请求应答中携带第一传输资源指示;
第二发送模块 503, 用于利用所述第一传输资源发送第二传输资源请求; 第二接收模块 504, 用于接收第二传输资源请求应答, 所述第二传输资 源请求应答中携带第二传输资源指示;
第三发送模块 505, 用于利用所述第二传输资源发送数据。
较佳地, 在另一实施例中, 所述 STA还可以包括: 资源分配模块, 位于第二接收模块 504和第三发送模块 505之间, 用于 根据所述第二传输资源指示, 将资源在各业务流之间进行分配。 所述第三发 送模块 505, 根据所述资源分配模块的资源分配结果, 将多个业务流在各自 对应的传输资源上传输数据。
较佳地, 所述第一传输资源请求可以为一调度请求序列。 所述第一传输资源请求为一调度请求序列。 较佳地, 所述第一发送模块 501, 用于在上行调度请求信道发送所述调 度请求序列。
较佳地, 所述第一接收模块 502, 用于根据所述调度请求序列的索引、 所述调度请求序列的频域循环移位索引、 所述调度请求序列在上行调度请求 信道的发送位置和所述调度请求序列发送的系统帧号接收所述调度请求序列 对应的第一传输资源请求应答。 较佳地, 所述第一接收模块 502, 用于在传输控制信道上接收所述第一 传输资源请求应答。
较佳地, 所述第二发送模块 503, 用于在所述第二传输资源请求中携带 STA的标识和所请求的资源。 较佳地, 所述第二发送模块 503, 通过在第二传输资源请求中携带一个 或者多个业务流的标识, 以及为各业务流所请求的带宽资源的大小, 从而基 于业务流进行资源请求。
较佳地, 所述第二发送模块 503, 用于在所述第二传输资源请求中以预 设的资源表中的索引指示带宽资源的大小。
较佳地, 所述第二发送模块 503, 还用于在所述第二传输资源请求中携 带请求资源的业务流的个数。 较佳地, 所述第二发送模块 503, 用于将所述第二传输资源请求封装为 一种独立资源请求帧发送出去;
所述独立资源请求帧包括帧头、 帧体和帧校验序列 FCS; 所述帧体包括: STA的标识, 以及一个或者多个 FID信息块, 每个 FID 信息块中包括业务流标识和资源索引。 较佳地, 所述第二发送模块 503, 用于将所述第二传输资源请求封装为 另一种独立资源请求帧发送出去; 所述独立资源请求帧包括帧头、 帧体和帧校验序列 FCS;
所述帧体包括: STA的标识、 业务流的个数, 以及一个或者多个 FID信 息块, 每个 FID信息块中包括业务流标识和资源索引。 较佳地, 在另一实施例中, 还可以包括第一重传模块, 与所述第一发送 模块 501和所述第一接收模块 502分别相连, 在所述第一发送模块 501发送 第一传输资源请求后, 启动计时, 如果超过预设的第一最大等待帧间隔后, 所述第一接收模块 502仍然没有收到第一传输资源请求应答, 则认为本次资 源请求失败, 触发所述第一发送模块 501重新发送第一传输资源请求。 较佳地, 在另一实施例中, 还可以包括第二重传模块, 与所述第二发送 模块 503和所述第二接收模块 504分别相连, 在所述第二发送模块 503发送 第二传输资源请求后, 如果超过预设的第二最大等待帧间隔后, 所述第二接 收模块 504仍然没有收到第二传输资源请求应答,则认为本次资源请求失败, 触发所述第一发送模块 501重新发送第一传输资源请求。 较佳地, 所述第二传输资源请求中还可以包括为每一个业务流所请求的 带宽资源的类型。
较佳地, 所述带宽资源的类型可以包括: 增量带宽, 用于指示为业务流分配第二传输资源时, 在为所述业务流已 分配的带宽资源大小的基础上, 增加或减少所述业务流本次请求的带宽资源 的大小; 总量带宽, 用于指示为业务流分配第二传输资源时, 使用所述业务流本 次请求的带宽资源的大小替换为所述业务流已分配的带宽资源大小。 较佳地, 所述第二传输资源请求还可以基于 STA上报资源请求: 即, 所述第二传输资源请求中可以包括发起所述第二传输资源请求的 STA需要的总的带宽资源的大小。
较佳地, 所述预设的资源表包括多种精度范围的资源表。
为了实现上述釆用竟争方式的资源请求方法, 本发明实施例还提供了一 种用于实现资源请求的 CAP, 如图 6所示, 包括: 第一接收模块 601, 用于接收第一传输资源请求, 为对应的 STA分配第 一传输资源;
第一发送模块 602,用于发送第一传输资源请求应答给所述对应的 STA, 所述第一传输资源请求应答携带第一传输资源指示;
第二接收模块 603, 用于接收第二传输资源请求, 为对应的 STA分配第 二传输资源;
第二发送模块 604,用于发送第二传输资源请求应答给所述对应的 STA, 所述第二传输资源请求应答携带第二传输资源指示; 所述第一传输资源用于 STA发送第二传输资源请求;
所述第二传输资源用于 STA发送数据。 较佳地, 所述第一接收模块 601, 从上行调度请求信道上接收所述第一 传输资源请求, 所述第一传输资源请求为一调度请求序列; 所述第一发送模 块 602, 用于在所述第一资源请求应答中携带所述对应的调度请求序列的索 ? I、 所述调度请求序列的频域循环移位索引、 所述调度请求序列在上行调度 请求信道的发送位置和所述调度请求序列发送的系统帧号。 较佳地, 所述第一发送模块 602, 用于在传输控制信道上发送所述第一 传输资源请求应答。
较佳地, 所述第一发送模块 602, 用于釆用广播方式发送所述第一传输 资源请求应答。
较佳地, 所述第二发送模块 604, 用于在传输控制信道上发送所述第二 传输资源请求应答。
较佳地, 所述第二发送模块 604, 用于釆用单播方式发送所述第二传输 资源请求应答。
较佳地, 所述第二发送模块 604, 在所述第二传输资源请求应答中携带 对应的 STA的标识, 以及为所述 STA分配的资源。
为了实现上述釆用竟争方式的资源请求方法, 本发明实施例还提供了一 种用于实现资源请求的系统, 包括如上所述的 STA和 CAP, 两者彼此交互, 通过竟争方式完成资源请求过程, 尤其适用于 STA 当前没有传输资源的场 景。
本发明实施例还提供了一种用于资源请求的方法, 包括:
生成传输资源请求, 所述传输资源请求中包括 STA的标识、 一个或者多 个业务流的标识, 以及为各业务流所请求的带宽资源的大小; 发送所述传输资源请求。
较佳地, 所述传输资源请求中还包括请求资源的业务流的个数。
较佳地, 将所述传输资源请求封装为一种独立资源请求帧的形式发送出 去 ··
所述独立资源请求帧包括帧头、 帧体和 FCS; 所述帧体包括: STA的标识、 以及一个或者多个 FID信息块, 每个 FID 信息块中包括业务流标识和资源索引。 较佳地, 将所述传输资源请求封装为另一种独立资源请求帧的形式发送 出去:
所述独立资源请求帧包括帧头、 帧体和 FCS;
所述帧体包括: STA的标识、 业务流的个数、 以及一个或者多个 FID信 息块, 每个 FID信息块中包括业务流标识和资源索引。 较佳地, 所述传输资源请求中还包括所述各业务流需要的带宽资源的类 型。
较佳地, 所述带宽资源的类型包括: 增量带宽, 用于指示为业务流分配传输资源时, 在为所述业务流已分配 的带宽资源大小的基础上, 增加或减少所述业务流本次请求的带宽资源的大 小;
总量带宽, 用于指示为业务流分配传输资源时, 使用所述业务流本次请 求的带宽资源的大小替换为所述业务流已分配的带宽资源大小。
较佳地, 所述带宽资源的大小以所述带宽资源在预设的资源表中的索引 指示。
较佳地, 在所述传输资源请求中携带预设的资源表的类型, 不同类型的 资源表对应于不同的精度范围。 所述预设的资源表包括多种精度范围的资源 表。
本发明实施例还提供了另一种用于资源请求的方法, 包括:
生成传输资源请求, 所述传输资源请求中包括 STA 的标识、 所述 STA 所请求的总的带宽资源的大小; 发送所述传输资源请求。 较佳地, 所述传输资源请求中还包括 STA所请求的带宽资源的类型。 较佳地, 所述带宽资源的类型包括: 增量带宽, 用于指示为 STA分配传输资源时, 在为所述 STA 已分配的 带宽资源大小的基础上, 增加或减少所述 STA本次请求的带宽资源的大小; 总量带宽, 用于指示为 STA分配传输资源时, 使用所述 STA本次请求 的带宽资源的大小替换为所述 STA已分配的带宽资源大小。
较佳地, 所述带宽资源的大小以所述带宽资源在预设的资源表中的索引 指示。
较佳地, 在所述传输资源请求中携带预设的资源表的类型, 不同类型的 资源表对应于不同的精度范围。 所述预设的资源表包括多种精度范围的资源 表。
第二实施例
本发明实施例还提供了一种资源请求的方法, 巧妙地利用传输上行数据 的时机和资源, 将传输资源请求随上行数据一起发送至 CAP, 具体如图 7所 示, 包括步骤: 步骤 S701 : STA将传输资源请求承载于数据帧中;
步骤 S702: 所述 STA发送所述携带传输资源请求的数据帧; 步骤 S703: CAP接收所述携带传输资源请求的数据帧;
步骤 S704: 所述 CAP从所述数据帧中解析出所述传输资源请求; 步骤 S705: 所述 CAP才艮据所述传输资源请求, 为所述 STA分配传输资 源;
步骤 S706: 所述 CAP发送传输资源请求应答给所述 STA, 所述传输资 源请求应答携带传输资源指示;
步骤 S707: 所述 STA接收所述传输资源请求应答;
步骤 S708: 所述 STA利用所述传输资源发送数据。 本发明实施例釆用上述方法巧妙地将传输资源请求随上行数据一起发送 至 CAP, 以请求资源。 在上有上行数据传输时, 可釆用本发明实施例上述随 路资源请求方式请求资源, 从而无须为先去请求发送所述传输资源请求所需 的上行传输资源, 资源请求的实现过程中交互步骤更少, 请求资源所需的时 长更短。
较佳地, STA 还可以在携带传输资源请求的数据帧中携带随路请求指 示, 用于指示所述传输资源请求的存在。 相应地, CAP在接收到数据帧后, 通过所述随路请求指示即可快速判断出所述数据帧中是否携带传输资源请 求。 当然, 在另一实施例中, 也可以不携带随路请求指示, 而是通过例如设 置特定字段承载所述传输资源请求, 通过解析对应字段, 来判断所述数据帧 中是否携带传输资源请求, 本发明在此不做限制。
考虑到 CAP在解析数据帧时,一般要先解析帧头,获取参数信息, 因此, 在数据帧中封装随路请求指示时, 可以将所述随路请求指示封装在所述数据 帧的帧头中。
在具体实现随路请求指示时, 可以在数据帧的帧头中设置一随路请求指 示字段, 通过所述字段的值指示所述传输资源请求的存在。 例如, 1 表示存 在传输资源请求, 0表示不存在传输资源请求。
所述随路请求指示字段可以为一新增字段, 也可以使用帧头中的已有字 段, 例如空闲字段, 重新定义其为随路请求指示字段, 本发明在此不做限制。 所述随路请求指示字段在帧头中的位置可按照预设的规则设置, 本发明在此 不丈限制。
STA可以将所述传输资源请求承载于所述数据帧的帧体中。 在具体实现 时, 可以在数据帧的帧体中设置一随路资源请求字段, 承载所述传输资源请 求。 当数据帧中不携带传输资源请求时, 则可不在数据帧的帧体中设置随路 资源请求字段, 或者也可将所述随路资源请求字段填充为一固定值。 所述随路资源请求字段可以为一新增字段, 也可以使用帧体中的已有字 段, 例如空闲字段, 重新定义其为随路资源请求字段, 本发明在此不做限制。 所述随路资源请求字段在帧体中的位置按照预设的规则设置, 例如可规定随 路资源请求字段为帧体的前若千个比特, 本发明在此不做限制。
较佳地, 本发明实施例提供了一种釆用随路方式上报的传输资源请求的 格式, 支持基于业务流上报所请求的资源。 其中, 所述传输资源请求中包括 发起所述传输资源请求的 STA的标识, 所述 STA为一个或者多个业务流中 的每一个业务流所请求的带宽资源的大小, 以及所述各业务流的标识。 CAP 通过解析所述传输资源请求, 可获知所述 STA的各业务流, 以及所述各业务 流的资源需求情况。 较佳地, 所述传输资源请求中还可以包括为每一个业务流所请求的带宽 资源的类型。 CAP 支持 STA根据需要为不同的业务流选择所请求的带宽资 源类型, 资源请求更为灵活, 更人性化。 可选的带宽资源的类型可以包括: 增量带宽, 用于指示为业务流分配第二传输资源时, 在为所述业务流已 分配的带宽资源大小的基础上, 增加或减少所述业务流本次请求的带宽资源 的大小。
总量带宽, 用于指示为业务流分配第二传输资源时, 使用所述业务流本 次请求的带宽资源的大小替换为所述业务流已分配的带宽资源大小。 较佳地, 本发明实施例还提供了另一种传输资源请求的格式, 支持基于 STA上报所请求的资源。 其中, 所述传输资源请求中包括发起所述传输资源 请求的 STA的标识, 以及所述 STA需要的总的带宽资源的大小。 较佳地,所述传输资源请求中还可以包括所述 STA需要的带宽资源的类 型。 CAP 支持 STA根据需要选择所请求的带宽资源类型, 资源请求更为灵 活, 更人性化。 可选的带宽资源的类型可以包括:
增量带宽, 用于指示为 STA分配第二传输资源时, 在为所述 STA 已分 配的带宽资源大小的基础上,增加或减少所述 STA本次请求的带宽资源的大 小;
总量带宽, 用于指示为 STA分配第二传输资源时, 使用所述 STA本次 请求的带宽资源的大小替换为所述 STA已分配的带宽资源大小。 较佳地, 本发明实施例还提供一种带宽资源表示方法, 通过设计资源表 (例如表 3 ), 以所述带宽资源在预设的资源表中索引来指示所请求的带宽资 源的大小。 从而在上报需要的带宽资源时, 仅需要承载所述带宽资源对应于 资源表中的索引值即可, 尤其在请求的带宽资源较大时, 以索引值来替代具 体的带宽资源数值, 将大大减少所占用的比特位, 节约传输资源。 较佳地,可以根据需要设计多种精度范围的资源表。在执行资源请求时, 可根据所请求的资源选择合适的资源表, 在资源请求中携带资源表的标识和 索引, CAP侧维护同样的资源表, 根据接收到的资源请求中的资源表的标识 和索引, 定位到对应的资源表中对应索引的资源大小, 从而获知 STA所请求 的资源的大小。
本发明实施例给出了一种具体的携带传输资源请求的数据帧结构, 包括 帧头、 帧体和 FCS。 帧头中包含随路资源请求字段, 当随路资源请求字段的 取值指示帧体中有传输资源请求时, 帧体中包含随路资源请求字段, 所述随 路资源请求字段中包含一个或者多个 FID信息块,每个 FID信息块包含业务 流标识 (FID)和资源索引。 其中, 资源索引表示所请求的带宽资源在资源表中 的索引。
在另一实施例中, FID信息块中还包括资源表的类型字段, 以支持不同 精细度的资源划分。 另外, 当可支持分配不同类型的资源时, 例如支持增量 和总量资源分配时, 还可以在 FID信息块中设置指示为该业务流请求的资源 类型的信息。
若釆用上述基于 STA上报的方式,则只需要改变上述随路资源请求字段 承载内容即可, 在其中承载资源表的标识和资源索引, 本发明实施例在此不 再赘述。
所述 CAP在为所述 STA分配传输资源后, 可以以单播的方式发送所述 传输资源请求应答, 其中携带传输资源指示。 所述 STA根据预设的规则, 接 收对应的应答。 例如, 以 STAID作为正确接收的判断依据, 即, STA在传输 资源请求中携带自身的 STAID, CAP在为所述 STA返回传输资源请求应答 时, 也会在所述传输资源请求应答中携带所述 STA的 STAID, STA通过判 断接收到的传输资源请求应答中是否携带其自身的 STAID, 从而确定是否正 确接收到对应的应答。
较佳地, 所述 CAP在为所述 STA分配传输资源后, 可以通过传输控制 信道下发资源分配指示。 即, 所述 CAP可以在传输控制信道上发送传输资源 请求应答, 其中携带传输资源指示。 相应地, 所述 STA将会在所述传输控制 信道上接收到所述传输资源请求应答,从中获知为其分配的传输资源。 当然, 在另一实施例中, 也可以设计通过其他信道下发所述传输资源请求应答, 本 发明在此不故限制。 较佳地, STA在接收传输资源请求应答后, 利用所述传输资源发送数据 之前, 还根据所述传输资源指示, 将资源在各业务流之间进行分配。
较佳地, STA在发送所述携带传输资源请求的数据帧后, 如果超过预设 的最大等待帧间隔后, 仍然未接收到对应的应答, 则认为本次请求失败, 需 要重新进行资源请求。 本发明实施例监控应答返回的时间, 从而判断资源请 求是否成功, 以便及时重新发起资源请求, 同时, 通过对帧计数实现定时, 使得定时更 ^"确, 处理更及时。 为了实现上述釆用随路方式的资源请求方法, 本发明实施例还提供了一 种用于实现随路资源请求的 STA, 如图 8所示, 包括: 封装模块 801, 用于将传输资源请求承载于数据帧中;
第一发送模块 802, 用于发送所述携带传输资源请求的数据帧。 接收模块 803, 用于接收传输资源请求应答, 所述传输资源请求应答中 携带传输资源指示;
第二发送模块 804, 用于利用所述传输资源发送数据。
较佳地, 在另一实施例中, 所述 STA还可以包括: 资源分配模块, 位于接收模块 803和第二发送模块 804之间, 用于根据 所述传输资源指示, 将资源在各业务流之间进行分配。 所述第二发送模块 804, 艮据所述资源分配模块的资源分配结果, 将多个业务流在各自对应的 传输资源上传输数据。
较佳地, 所述封装模块 801, 还可以在数据帧中封装随路请求指示, 用 于指示所述传输资源请求的存在。 较佳地, 所述封装模块 801, 可以将所述随路请求指示承载于所述数据 帧的帧头中。
较佳地, 所述封装模块 801, 可以在数据帧的帧头中设置有一字段, 通 过所述字段的值指示所述传输资源请求的存在。
较佳地, 所述封装模块 801, 可以将所述传输资源请求承载于所述数据 帧的帧体中。
较佳地, 所述封装模块 801, 可以在在数据帧的帧体中设置一字段, 承 载所述传输资源请求。
较佳地, 所述传输资源请求可以基于业务流上报资源请求: 即, 所述传输资源请求中可以包括一个或者多个业务流的标识, 以及为 各业务流所请求的带宽资源的大小。
较佳地, 所述传输资源请求中还可以包括为各业务流所请求的带宽资源 的类型。
较佳地, 所述带宽资源的类型可以包括: 增量带宽, 用于指示为业务流分配传输资源时, 在为所述业务流已分配 的带宽资源大小的基础上, 增加或减少所述业务流本次请求的带宽资源的大 小;
总量带宽, 用于指示为业务流分配传输资源时, 使用所述业务流本次请 求的带宽资源的大小替换为所述业务流已分配的带宽资源大小。
较佳地, 所述传输资源请求可以基于 STA上报资源请求: 即,所述传输资源请求中可以包括发起所述传输资源请求的 STA需要的 总的带宽资源的大小。
较佳地, 所述传输资源请求中还可以包括带宽资源的类型。
较佳地, 所述带宽资源的类型可以包括: 增量带宽, 用于指示为 STA分配传输资源时, 在为所述 STA 已分配的 带宽资源大小的基础上, 增加或减少所述 STA本次请求的带宽资源的大小; 总量带宽, 用于指示为 STA分配传输资源时, 使用所述 STA本次请求 的带宽资源的大小替换为所述 STA已分配的带宽资源大小。
较佳地, 所述传输资源请求中包括发送所述传输资源请求的 STA 的标 识; 所述传输资源请求应答携带有所述 STA的标识。 较佳地, 可以以预设的资源表中的索引指示带宽资源的大小。
较佳地, 所述预设的资源表包括多种精度范围的资源表。 较佳地, 所述第二发送模块 804, 将多个业务流在所述传输资源中各自 对应的传输资源上传输数据。
较佳地, 所述接收模块 803, 可以在传输控制信道上接收所述传输资源 请求应答。
较佳地, 在另一实施例中, 所述 STA还可以包括: 重传模块, 在所述第一发送模块 802发送所述携带传输资源请求的数据 帧后, 启动计时, 如果超过预设的最大等待帧间隔后, 所述接收模块 803仍 然没有收到所述传输资源请求应答, 则认为本次资源请求失败, 触发封装模 块 801在有数据帧传输时, 将所述传输资源请求承载于数据帧中, 重新发起 资源请求。
为了实现上述釆用随路方式的资源请求方法, 本发明实施例还提供了一 种用于实现随路资源请求的 CAP, 如图 9所示, 包括: 接收模块 901, 用于接收携带传输资源请求的数据帧; 解析模块 902, 用于从所述数据帧中解析出所述传输资源请求; 资源分配模块 903, 用于根据所述传输资源请求, 为对应的 STA分配传 输资源; 发送模块 904, 用于发送传输资源请求应答给所述对应的 STA, 所述传 输资源请求应答中携带传输资源指示。
较佳地, 所述数据帧中还可以包括随路请求指示, 用于指示所述传输资 源请求的存在。 相应地, 所述解析模块 902, 可通过解析数据帧中的随路请 求指示, 获知传输资源请求的存在。
较佳地, 数据帧的帧头中设置有一字段, 所述字段的值指示所述传输资 源请求的存在。 相应地, 所述解析模块 902, 可通过解析数据帧的帧头中的 随路请求指示字段, 得到所述随路请求指示。 较佳地, 所述传输资源请求承载于所述数据帧的帧体中。 相应地, 所述 解析模块 902, 可通过解析数据帧的帧体, 得到所述传输资源请求。 较佳地, 所述数据帧的帧体中设置有一字段, 承载所述传输资源请求。 相应地, 所述解析模块 902, 可通过解析数据帧的帧体中的随路资源请求字 段, 以得到所述传输资源请求。
较佳地, 所述传输资源请求可以基于业务流上报资源请求: 即, 所述传输资源请求中包括一个或者多个业务流的标识, 以及为各业 务流所请求的带宽资源的大小。 较佳地, 所述传输资源请求中还可以包括为各业务流请求的带宽资源的 类型。
较佳地, 所述带宽资源的类型可以包括: 增量带宽, 用于指示为业务流分配传输资源时, 在为所述业务流已分配 的带宽资源大小的基础上, 增加或减少所述业务流本次请求的带宽资源的大 小;
总量带宽, 用于指示为业务流分配传输资源时, 使用所述业务流本次请 求的带宽资源的大小替换为所述业务流已分配的带宽资源大小。
较佳地, 所述传输资源请求可以基于 STA上报资源请求: 即,所述传输资源请求中包括发起所述传输资源请求的 STA需要的总的 带宽资源的大小。
较佳地, 所述传输资源请求中还可以包括带宽资源的类型。
较佳地, 所述带宽资源的类型可以包括: 增量带宽, 用于指示为 STA分配传输资源时, 在为所述 STA 已分配的 带宽资源大小的基础上, 增加或减少所述 STA本次请求的带宽资源的大小; 总量带宽, 用于指示为 STA分配传输资源时, 使用所述 STA本次请求 的带宽资源的大小替换为所述 STA已分配的带宽资源大小。 较佳地, 所述传输资源请求中包括发送所述传输资源请求的 STA 的标 识; 所述传输资源请求应答中携带所述 STA的标识。 较佳地, 可以以预设的资源表中的索引指示带宽资源的大小。
较佳地, 所述预设的资源表包括多种精度范围的资源表。 较佳地, 所述发送模块 904, 可以在传输控制信道上发送所述传输资源 请求应答给所述对应的 STA。
较佳地, 所述发送模块 904, 可以釆用单播方式发送所述传输资源请求 应答给所述对应的 STA。
为了实现上述釆用随路方式的资源请求方法, 本发明实施例还提供了一 种用于实现随路资源请求的系统, 包括如上所述的 STA和 CAP, 两者彼此 交互, 充分利用数据传输的时机和资源, 通过随路方式完成资源请求过程。
第三实施例
本发明实施例还提供了一种资源分配的方法, 由 CAP 主动为至少一个 STA轮询分配用于发送资源请求的资源, 具体如图 10所示, 包括步骤: 步骤 S1001 : CAP轮询至少一个 STA, 为每个轮询到的 STA分配第一 传输资源;
步骤 S 1002: 所述 CAP发送第一传输资源指示给所述轮询到的 STA; 步骤 S 1003: 所述 STA接收第一传输资源指示;
步骤 S1004: 所述 STA利用所述第一传输资源发送传输资源请求; 步骤 S 1005: 所述 CAP接收所述传输资源请求, 为对应的 STA分配第 二传输资源;
步骤 S1006: 所述 CAP发送传输资源请求应答给所述对应的 STA, 所述 传输资源请求应答中携带第二传输资源指示;
步骤 S1007: 所述 STA接收所述传输资源请求应答; 步骤 S1008: 所述 STA利用所述第二传输资源发送数据。
本发明实施例由 CAP釆用轮询方式主动为 STA分配第一传输资源, 从 而使得 STA可以利用第一传输资源发起资源请求,很好地解决了在请求上行 数据传输资源时, 如何获取到发送请求上行传输数据的请求所需的传输资源 的问题。 较佳地, CAP可以按照预设的轮询策略轮询 STA:
例如, 可以设置轮询次序, 轮询间隔、 资源分配条件等轮询参数, 并据 以轮询 STA。本发明实施例中设置资源分配条件为所有轮询到的 STA都分配 资源。
较佳地, 所述轮询策略还可以设置为: 判断当前是否有传输资源可供分 配; 当前有传输资源可供分配时, 启动轮询步骤。 从而在有传输资源可供分 配时, 就由 CAP主动为 STA分配传输资源, 无须 STA再去请求, 减少了资 源请求过程中的交互过程, 能够提升系统整体的资源请求速度。
所述 CAP 可以按照预定的规则触发对当前可分配的带宽资源的判断, 例如可以是周期性判断、 实时判断、 或者在符合某些条件时判断, 本发明在 此不^ 限制。 所述 CAP在为所述 STA分配第一传输资源后, 可以以单播的方式发送 所述第一传输资源指示给所述 STA。
较佳地, 所述 CAP在为所述 STA分配第一传输资源后, 可以通过传输 控制信道下发资源分配指示。 即, 所述 CAP可以在传输控制信道上发送第一 传输资源指示。 相应地, 所述 STA将会在所述传输控制信道上接收到所述第 一传输资源指示, 从中获知为其分配的第一传输资源。 当然, 在另一实施例 中, 也可以设计通过其他信道下发所述第一传输资源指示, 本发明在此不做 限制。
较佳地, 本发明实施例提供了一种传输资源请求的格式, 支持基于业务 流上报所请求的资源。 其中, 所述传输资源请求中包括发起所述传输资源请 求的 STA的标识, 一个或者多个业务流的标识, 以及为各业务流所请求的带 宽资源的大小。 CAP通过解析所述传输资源请求, 可获知所述 STA的各业 务流, 以及所述各业务流的资源需求情况。 较佳地, 所述传输资源请求中还可以包括为每一个业务流请求的带宽资 源的类型。 CAP 支持 STA根据需要为不同的业务流选择所请求的带宽资源 类型, 资源请求更为灵活, 更人性化。 可选的带宽资源的类型可以包括: 增量带宽, 用于指示为业务流分配第二传输资源时, 在为所述业务流已 分配的带宽资源大小的基础上, 增加或减少所述业务流本次请求的带宽资源 的大小。
总量带宽, 用于指示为业务流分配第二传输资源时, 使用所述业务流本 次请求的带宽资源的大小替换为所述业务流已分配的带宽资源大小。 较佳地, 本发明实施例还提供了另一种传输资源请求的格式, 支持基于 STA上报所请求的资源。 其中, 所述传输资源请求中包括发起所述传输资源 请求的 STA的标识, 以及所述 STA需要的总的带宽资源的大小。 较佳地,所述传输资源请求中还可以包括所述 STA请求的带宽资源的类 型。 CAP 支持 STA根据需要选择所请求的带宽资源类型, 资源请求更为灵 活, 更人性化。 可选的带宽资源的类型可以包括:
增量带宽, 用于指示为 STA分配第二传输资源时, 在为所述 STA 已分 配的带宽资源大小的基础上,增加或减少所述 STA本次请求的带宽资源的大 小;
总量带宽, 用于指示为 STA分配第二传输资源时, 使用所述 STA本次 请求的带宽资源的大小替换为所述 STA已分配的带宽资源大小。 较佳地, 本发明实施例还提供一种带宽资源表示方法, 通过设计资源表 (可参见表 3 ), 以所述带宽资源在预设的资源表中索引来指示所请求的带宽 资源的大小。 从而在上报需要的带宽资源时, 仅需要承载所述带宽资源对应 于资源表中的索引值即可, 尤其在请求的带宽资源较大时, 以索引值来替代 具体的带宽资源数值, 将大大减少所占用的比特位, 节约传输资源。 较佳地, 可以根据需要设计多种精度范围的资源表。 例在执行资源请求 时, 可根据所请求的资源选择合适的资源表, 在资源请求中携带资源表的标 识和索引, CAP侧维护同样的资源表, 根据接收到的资源请求中的资源表的 标识和索引, 定位到对应的资源表中对应索引的资源大小, 从而获知 STA所 请求的资源的大小。 本发明实施例中, 所述传输资源请求可以承载于资源请求帧中发送。 本 发明实施例以上述基于业务流上报的方式为例, 给出了一种具体的资源请求 帧结构, 如图 4所示, 包括帧头、 帧体和 FCS。 帧头中包含帧控制信息, 例 如帧类型 (此处为管理控制)、 子类型 (此处为独立资源请求帧)、 版本信息 等; 帧体中包含 STAID, FID个数, 以及一个或者多个 FID信息块,每个 FID 信息块中包括业务流标识和资源索引。 其中, 资源索引是所请求的带宽资源 在资源表中的索引。 另外, 当可支持分配不同类型的资源时, 例如支持增量 和总量资源分配时, 还可以在所述业务流的带宽资源请求信息中设置指示该 业务流请求的资源类型的信息。
另外, 本发明设计独立资源请求帧的帧体中 STAID字段占用 12bit, FID 个数字段占用 4bit, FCS字段占 32bit, 其中每个 FID信息块占 16bit, 依次 是 4bit的 FID字段、 4bit的预留字段、 7bit的资源索引字段和 lbit的预留字 段。 从而实现了按字节读取, 筒化了处理。
若釆用上述基于 STA上 4艮的方式,则只需要改变图 4所示的独立资源请 求帧的帧体部分即可, 在帧体部分封装 STAID和资源索引。 另外, 若釆用多 种精度的资源表, 则还可以在帧体中设置资源表类型字段, 本发明实施例在 此不再赘述。 所述 CAP在为所述 STA分配第二传输资源后, 可以以单播的方式发送 所述传输资源请求应答, 其中携带第二传输资源指示。 所述 STA根据预设的 规则,接收对应的应答。 例如, 以 STAID作为正确接收的判断依据, 即, STA 在传输资源请求中携带自身的 STAID, CAP在为所述 STA返回传输资源请 求应答时, 也会在所述传输资源请求应答中携带所述 STA 的 STAID, STA 通过判断接收到的传输资源请求应答中是否携带其自身的 STAID, 从而确定 是否正确接收到对应的应答。
较佳地, 所述 CAP可以通过传输控制信道发送传输资源请求应答, 其中 携带第二传输资源指示。 相应地, 所述 STA将会在所述传输控制信道上接收 到所述传输资源请求应答, 从中获知为其分配的第二传输资源。 当然, 在另 一实施例中, 也可以设计通过其他信道, 例如下行传输信道, 下发所述传输 资源请求应答, 本发明在此不故限制。
为了实现上述轮询分配, 本发明实施例还提供了一种用于实现资源分配 的 CAP, 口图 11所示, 包括: 第一资源分配模块 1101, 用于轮询至少一个 STA, 为每个轮询到的 STA 分配第一传输资源; 第一发送模块 1102, 用于发送第一传输资源指示给所述轮询到的 STA; 第二资源分配模块 1103, 用于接收传输资源请求, 为对应的 STA分配 第二传输资源; 第二发送模块 1104, 用于发送传输资源请求应答给所述对应的 STA, 所 述传输资源请求应答携带第二传输资源指示;
所述第一传输资源用于 STA发送传输资源请求;
所述第二传输资源用于 STA发送数据。 较佳地,所述第二资源分配模块 1103支持对基于业务流上报的资源请求 的处理。所述基于业务流上报的资源请求包括:所述传输资源请求中包括 STA 的标识、 一个或者多个业务流的标识, 以及为各业务流所请求的带宽资源的 大小。 所述第二资源分配模块 1103通过解析所述传输资源请求, 可获知所述 STA的各业务流, 以及所述各业务流的资源需求情况。 较佳地, 所述传输资源请求中还可以包括为每一个业务流所请求的带宽 资源的类型。 所述第二资源分配模块 1103支持 STA根据需要为不同的业务 流选择所请求的带宽资源类型, 资源请求更为灵活, 更人性化。 可选的带宽资源的类型可以包括: 增量带宽, 用于指示为业务流分配第二传输资源时, 在为所述业务流已 分配的带宽资源大小的基础上, 增加或减少所述业务流本次请求的带宽资源 的大小。
总量带宽, 用于指示为业务流分配第二传输资源时, 使用所述业务流本 次请求的带宽资源的大小替换为所述业务流已分配的带宽资源大小。 较佳地, 所述第二资源分配模块 1103还支持对基于 STA上报的资源请 求的处理。 所述基于 STA上报的资源请求包括: 所述传输资源请求中包括发 起所述传输资源请求的 STA的标识, 以及所述 STA需要的总的带宽资源的 大小。 所述第二资源分配模块 1103通过解析所述传输资源请求, 可获知所述 STA总的资源需求情况。 较佳地,所述传输资源请求中还可以包括所述 STA需要的带宽资源的类 型。 所述第二资源分配模块 1103支持 STA根据需要选择所请求的带宽资源 类型, 资源请求更为灵活, 更人性化。 可选的带宽资源的类型可以包括:
增量带宽, 用于指示为 STA分配第二传输资源时, 在为所述 STA 已分 配的带宽资源大小的基础上,增加或减少所述 STA本次请求的带宽资源的大 小;
总量带宽, 用于指示为 STA分配第二传输资源时, 使用所述 STA本次 请求的带宽资源的大小替换为所述 STA已分配的带宽资源大小。 较佳地, 可以以所述带宽资源在预设的资源表中的索引指示所请求的带 宽资源的大小。 较佳地, 所述预设的资源表包括多种精度范围的资源表。
较佳地, 所述第一发送模块 1102, 可以在传输控制信道上发送所述第一 传输资源指示。
较佳地, 所述第一发送模块 1102, 可以釆用单播方式发送所述第一传输 资源指示。
较佳地, 所述第二发送模块 1104, 可以在传输控制信道上发送所述传输 资源请求应答。
较佳地, 所述第二发送模块 1104, 可以釆用单播方式发送所述传输资源 请求应答。
较佳地, 所述 CAP还可包括: 判断模块 1105, 用于判断当前是否有传输资源可供分配, 如果当前有传 输资源可供分配时, 向所述第一资源分配模块 1101发送资源分配指令。所述 第一资源分配模块 1101, 接收到所述资源分配指令后, 执行轮询处理。
第四实施例
本发明实施例还提供了另一种资源分配的方法, 由 CAP主动为 STA分 配用于发送数据的资源, 如图 12所示, 包括步骤: 步骤 S1201 : CAP轮询至少一个 STA, 为每个轮询到的 STA分配第一 传输资源;
步骤 S1202: 所述 CAP发送第一传输资源指示给所述轮询到的 STA; 步骤 S 1203: 所述 STA接收第一传输资源指示;
步骤 S1204: 所述 STA利用所述第一传输资源发送数据。
与第三实施例中的资源分配方法不同之处在于 CAP为分配 STA轮询分 配的直接就是用于发送数据的资源,不需要 STA再发起资源请求来获得发送 数据的资源了。
为了实现上述轮询分配, 本发明实施例还提供了一种用于实现资源分配 的 CAP, 口图 13所示, 包括:
第一资源分配模块 1301, 用于轮询至少一个 STA, 为每个轮询到的 STA 分配第一传输资源; 第一发送模块 1302, 用于发送第一传输资源指示给所述轮询到的 STA; 所述第一传输资源用于 STA发送数据。
较佳地, 所述第一发送模块 1302, 可以在传输控制信道上发送所述第一 传输资源指示。
较佳地, 所述第一发送模块 1302, 可以釆用单播方式发送所述第一传输 资源指示。
较佳地, 所述 CAP还可包括: 判断模块 1303, 用于判断当前是否有传输资源可供分配, 如果当前有传 输资源可供分配时, 向所述第一资源分配模块 1301 发送资源分配指令。 所 述第一资源分配模块 1301, 接收到所述资源分配指令后, 执行轮询处理。
第五实施例
本发明实施例还提供了又一种资源分配的方法, 由 CAP 主动为至少一 个 STA轮询分配用于发送资源请求的资源, 具体如图 14所示, 包括步骤: 步骤 S 1401: CAP轮询至少一个 STA, 为每个轮询到且到达其资源分配 周期的 STA分配第一传输资源;
步骤 S1402: 所述 CAP发送第一传输资源指示给所述轮询到的 STA; 步骤 S 1403: 所述 STA接收第一传输资源指示; 步骤 S1404: 所述 STA利用所述第一传输资源发送传输资源请求; 步骤 S 1405: 所述 CAP接收所述传输资源请求, 为对应的 STA分配第 二传输资源;
步骤 S1406: 所述 CAP发送传输资源请求应答给所述对应的 STA, 所述 传输资源请求应答中携带第二传输资源指示;
步骤 S 1407: 所述 STA接收所述传输资源请求应答; 步骤 S1408: 所述 STA利用所述第二传输资源发送数据。
本发明上述实施例在第三实施例轮询分配方案的基础上增加了对 STA 资源分配周期的监控, 优先为已经达到资源分配周期的 STA分配资源, 从而 使得资源的分配更为合理。
CAP维护 STA的资源分配周期, 在为 STA分配第一传输资源后, 将为 被分配第一传输资源的 STA重新计算资源分配周期。
在具体实现时,所述 CAP可以利用定时器来维护 STA的资源分配周期, 定时器超时, 则认为 STA达到配置的资源分配周期, 为所述 STA分配资源, 并重启所述定时器; 如果未超时, 则认为所述 STA还没达到配置的资源分配 周期, 不为所述 STA分配资源。 较佳地, 根据 STA的当前业务类型参数计算 STA的资源分配周期。 所 述业务类型参数包括优先级、 时延预算、 丟包率预算等参数。 从而能够根据 业务的实际需要设置, 以能够满足业务需求为目的, 使得资源的分配更为合 理。
为了实现上述轮询分配, 本发明实施例还提供了一种用于实现资源分配 的 CAP, 口图 15所示, 包括:
第一资源分配模块 1501, 用于轮询至少一个 STA, 为每个轮询到且到达 其资源分配周期的 STA分配第一传输资源;
第一发送模块 1502, 用于发送第一传输资源指示给所述轮询到的 STA; 第二资源分配模块 1503, 用于接收传输资源请求, 为对应的 STA分配 第二传输资源; 第二发送模块 1504, 用于发送传输资源请求应答给所述对应的 STA, 所 述传输资源请求应答携带第二传输资源指示; 所述第一传输资源用于 STA发送传输资源请求;
所述第二传输资源用于 STA发送数据。 较佳地, 所述第一资源分配模块 1501 还为被分配第一传输资源的 STA 重新计算资源分配周期。 在具体实现时,所述第一资源分配模块 1501可以利用定时器来维护 STA 的资源分配周期, 定时器超时, 则认为 STA达到配置的资源分配周期, 为所 述 STA分配资源, 并重启所述定时器; 如果未超时, 则认为所述 STA还没 达到配置的资源分配周期, 不为所述 STA分配资源。 较佳地, 所述第一资源分配模块 1501可根据 STA的当前业务类型参数 计算 STA的资源分配周期。 所述业务类型参数包括优先级、 时延预算、 丟包 率预算等参数。
较佳地, 所述第二资源分配模块 1503 支持对基于业务流上报的资源请 求的处理。 所述基于业务流上报的资源请求包括: 所述传输资源请求中包括 STA的标识、 一个或者多个业务流的标识, 以及各业务流需要的带宽资源的 大小。 所述第二资源分配模块 1503 通过解析所述传输资源请求, 可获知所 述 STA的各业务流, 以及所述各业务流的资源需求情况。 较佳地, 所述传输资源请求中还可以包括为每一个业务流所请求的带宽 资源的类型。 所述第二资源分配模块 1503支持 STA根据需要为不同的业务 流选择所请求的带宽资源类型, 资源请求更为灵活, 更人性化。 可选的带宽资源的类型可以包括: 增量带宽, 用于指示为业务流分配第二传输资源时, 在为所述业务流已 分配的带宽资源大小的基础上, 增加或减少所述业务流本次请求的带宽资源 的大小。
总量带宽, 用于指示为业务流分配第二传输资源时, 使用所述业务流本 次请求的带宽资源的大小替换为所述业务流已分配的带宽资源大小。 较佳地, 所述第二资源分配模块 1503还支持对基于 STA上报的资源请 求的处理。 所述基于 STA上报的资源请求包括: 所述传输资源请求中包括发 起所述传输资源请求的 STA的标识, 以及所述 STA需要的总的带宽资源的 大小。 所述第二资源分配模块 1503 通过解析所述传输资源请求, 可获知所 述 STA总的资源需求情况。 较佳地,所述传输资源请求中还可以包括所述 STA需要的带宽资源的类 型。 所述第二资源分配模块 1503支持 STA根据需要选择所请求的带宽资源 类型, 资源请求更为灵活, 更人性化。 可选的带宽资源的类型可以包括:
增量带宽, 用于指示为 STA分配第二传输资源时, 在为所述 STA 已分 配的带宽资源大小的基础上,增加或减少所述 STA本次请求的带宽资源的大 小;
总量带宽, 用于指示为 STA分配第二传输资源时, 使用所述 STA本次 请求的带宽资源的大小替换为所述 STA已分配的带宽资源大小。 较佳地, 可以以预设的资源表中的索引指示所请求的带宽资源的大小。 较佳地, 所述预设的资源表包括多种精度范围的资源表。
较佳地, 所述第一发送模块 1502, 可以在传输控制信道上发送所述第一 传输资源指示。
较佳地, 所述第一发送模块 1502, 可以釆用单播方式发送所述第一传输 资源指示。
较佳地, 所述第二发送模块 1504, 可以在传输控制信道上发送所述传输 资源请求应答。
较佳地, 所述第二发送模块 1504, 可以釆用单播方式发送所述传输资源 请求应答。
较佳地, 所述 CAP还可包括: 判断模块 1505, 用于判断当前是否有传输资源可供分配, 如果当前有传 输资源可供分配时, 向所述第一资源分配模块 1501 发送资源分配指令。 所 述第一资源分配模块 1501, 接收到所述资源分配指令后, 执行轮询处理。
第六实施例
本发明实施例还提供了又一种资源分配的方法, 由 CAP主动为 STA分 配用于发送数据的资源, 如图 16所示, 包括步骤:
步骤 S 1601: CAP轮询至少一个 STA, 为每个轮询到且到达其资源分配 周期的 STA分配第一传输资源;
步骤 S 1602: 所述 CAP发送第一传输资源指示给所述轮询到的 STA; 步骤 S 1603: 所述 STA接收第一传输资源指示;
步骤 S 1604: 所述 STA利用所述第一传输资源发送数据。
与第五实施例中的资源分配方法不同之处在于 CAP为分配 STA轮询分 配的直接就是用于发送数据的资源,不需要 STA再发起资源请求来获得发送 数据的资源了。
为了实现上述轮询分配, 本发明实施例还提供了一种用于实现资源分配 的 CAP, 口图 17所示, 包括: 第一资源分配模块 1701, 用于轮询至少一个 STA, 为每个轮询到的 STA 分配第一传输资源; 第一发送模块 1702, 用于发送第一传输资源指示给所述轮询到的 STA; 所述第一传输资源用于 STA发送数据。 较佳地, 所述第一资源分配模块 1701 还为被分配第一传输资源的 STA 重新计算资源分配周期。
在具体实现时,所述第一资源分配模块 1701可以利用定时器来维护 STA 的资源分配周期, 定时器超时, 则认为 STA达到配置的资源分配周期, 为所 述 STA分配资源, 并重启所述定时器; 如果未超时, 则认为所述 STA还没 达到配置的资源分配周期, 不为所述 STA分配资源。 较佳地, 所述第一资源分配模块 1701可根据 STA的当前业务类型参数 计算 STA的资源分配周期。 所述业务类型参数包括优先级、 时延预算、 丟包 率预算等参数。
较佳地, 所述第一发送模块 1702, 可以在传输控制信道上发送所述第一 传输资源指示。
较佳地, 所述第一发送模块 1702, 可以釆用单播方式发送所述第一传输 资源指示。
较佳地, 所述 CAP还可包括: 判断模块 1703, 用于判断当前是否有传输资源可供分配, 如果当前有传 输资源可供分配时, 向所述第一分配模块发送资源分配指令。 所述第一分配 模块, 接收到所述资源分配指令后, 执行轮询。
第七实施例
本发明上述第一至第六实施例给出了 STA 获取上行传输数据所需的资 源的几种方式, 包括: 竟争资源请求方式(第一实施例)、 随路资源请求方式 (第二实施例)、 轮询分配方式 (第三至第六实施例)。 其中: 竟争资源请求方式和随路资源请求方式都是由 STA 主动发起请求, 其 中: 竟争资源请求方式由 STA是通过竟争方式主动请求得到资源, 可适用于 无上行传输资源可利用的场景;随路资源请求方式是由 STA将资源请求信息 承载于数据帧中, 随上行传输数据一起发送, 更适用于当前有数据上行传输 的场景, 能够减少资源请求的交互次数, 提升系统整体的资源分配速度。 轮 询分配方式则提供了一种由 CAP主动为 STA分配资源的方式,无需 STA主 动发起请求, 能够合理分析资源, 在可用时主动为 STA分配, 能够减少资源 请求的交互次数, 提升系统整体的资源分配速度。 因此, 若能够根据具体场 景, 合理将这 3种资源分配方式合理结合, 将会达到更优的效果。 本发明实 施例在此提供一种合理结合的方式, 如下: CAP在有可用资源时, 将主动为 STA分配资源, STA在获知 CAP为其 分配的资源后, 可以利用所述上行传输资源发送资源请求, 或者直接发送数 据; CAP没有为 STA分配资源时, 如果当前没有上行传输资源, STA适宜 釆用竟争方式发起资源请求; 如果当前有上行传输资源, 适宜釆用随路方式 将资源请求承载于数据帧中发送出去。
较佳地, 本发明实施例设计 CAP向 STA分配用于上行传输数据所需的 资源是基于 STAID实现的, 即 CAP根据 STA请求的资源(基于 FID请求或 者基于 STA请求), 计算为 STA分配的总的资源, 将资源在业务流之间的分 配则交由 STA侧来完成, 即, STA在获知为其分配的总的资源后, 要通过 内部调度, 在业务流之间进行二次分配, 即将传输资源在多个业务流之间分 配, 之后, 控制所述多个业务流分别在对应的传输资源上传输数据。 所述将 资源在业务流之间进行分配的方式可以才艮据需要设置,例如按照优先级分配、 均分等等, 本发明在此不做限制。 釆用上述二次分配方式, 筒化了 CAP侧的 操作, 由 STA侧分担部分资源分配工作, 对多 STA系统而言, 能够大大提 升系统整体的资源分配速度, 且, STA可以根据需求设计资源分配的策略, 例如设置业务优先级, 从而使得资源分配更为灵活, 能够满足不同用户的需 求, 用户体验效果更佳。
较佳地, 所述 STA在获知为其分配的资源后, 还判断所述分配的资源是 否满足需求, 如果满足需求, 则利用所述传输资源发送待发送数据, 如果不 满足需求, 则利用所述传输资源发送待发送数据中的部分数据, 同时根据当 前需要的带宽资源, 再次执行资源请求。 再次执行资源请求时, 由于有上行 数据发送, 因此, 较佳的做法是, 釆用随路资源请求方式实现资源请求。 可以将分配的资源与所请求的资源比较, 以判断是否满足需求, 如果所 述分配的资源小于请求的资源, 则认为不满足需求, 否则, 认为满足需求。
较佳地, 所述 STA在发送请求消息后的一预设的时间范围内, 如果未接 收到对应的应答, 则认为本次请求失败, 将会再次执行资源请求。 较佳地, 本发明实施例釆用对帧计数的方式实现定时,使得定时更精确, 处理更及时: 当釆用竟争资源请求方式请求资源时, CAP在接收到第二传输资源请求 后, 还会返回应答 ( ACK )消息, 以通知 STA已接收到所述第二传输资源请 求。 STA在发送第一传输资源请求后, 如果超过预设的第一最大等待帧间隔 后, 仍然没有收到第一传输资源请求应答, 则认为本次资源请求失败, 需要 重新进行资源请求; 或者, 在发送第二传输资源请求后, 如果超过预设的第 二最大等待帧间隔后, 仍然没有收到第二传输资源请求应答, 则认为本次资 源请求失败, 需要重新进行资源请求。 当釆用随路资源请求方式实现资源请求时, 在发送携带资源请求信息的 数据帧后, 如果超过预设的第三最大等待帧间隔后, 仍然未接收到对应的应 答, 则认为本次请求失败, 将会再次执行资源请求。
再次执行资源请求的具体方式, 可根据当时的场景而确定, 如果当前没 有上行传输资源, STA适宜釆用竟争方式发起资源请求; 如果当前有上行传 输资源, 适宜釆用随路方式将资源请求承载于数据帧中发送出去。 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。 在上述的详细描述中, 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, "在权利要求中用作衔接词所解释的那 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. 一种用于资源请求的方法, 其特征在于, 包括: 将传输资源请求承载于数据帧中;
发送所述携带传输资源请求的数据帧。
2. 如权利要求 1所述的方法, 其特征在于, 还包括: 接收传输资源请求应答, 所述传输资源请求应答中携带传输资源指示; 利用所述传输资源发送数据。
3. 如权利要求 2所述的方法, 其特征在于: 在接收传输资源请求应答后, 利用所述传输资源发送数据之前, 还根据 所述传输资源指示, 将资源在各业务流之间进行分配。
4. 如权利要求 1所述的方法, 其特征在于: 将所述传输资源请求承载于所述数据帧的帧体中。
5. 如权利要求 4所述的方法, 其特征在于, 还包括: 在所述数据帧的帧头中设置随路请求指示, 用于指示所述传输资源请求 的存在。
6. 如权利要求 1所述的方法, 其特征在于: 在所述传输资源请求中封装一个或者多个业务流的标识, 以及为各业务 流请求的带宽资源的大小。
7. 如权利要求 6所述的方法, 其特征在于: 在所述传输资源请求中以预设的资源表中的索引指示带宽资源的大小。
8. 如权利要求 7所述的方法, 其特征在于: 在所述传输资源请求中携带资源表的类型, 不同类型的资源表对应于不 同的精度范围。
9. 如权利要求 1所述的方法, 其特征在于: 在发送所述携带传输资源请求的数据帧后, 如果超过预设的最大等待帧 间隔后, 仍然未接收到对应的应答, 则认为本次请求失败, 需要重新进行资 源请求。
10.—种用于资源请求的方法, 其特征在于, 包括: 接收携带传输资源请求的数据帧;
从所述数据帧中解析出所述传输资源请求; 才艮据所述传输资源请求, 为对应的站点 STA分配传输资源;
发送传输资源请求应答给所述对应的 STA, 所述传输资源请求应答中携 带传输资源指示。
11.如权利要求 10所述的方法, 其特征在于: 从所述数据帧的帧体中解析出所述传输资源请求。
12.如权利要求 11所述的方法, 其特征在于, 还包括: 解析所述数据帧的帧头, 获得随路请求指示, 据以判断所述传输资源请 求的存在。
13.如权利要求 10所述的方法, 其特征在于: 所述传输资源请求中包括一个或者多个业务流的标识, 以及为各业务流 所请求的带宽资源的大小; 根据所述传输资源请求分别为所述一个或者多个业务流分配带宽资源。
14.如权利要求 13所述的方法, 其特征在于: 所述带宽资源的大小以所述带宽资源在预设的资源表中的索引指示; 通过查找预设的资源表, 获知为各业务流请求的带宽资源的大小。
15.如权利要求 14所述的方法, 其特征在于: 所述传输资源请求中携带资源表的类型;
在根据索引查找资源表之前, 先根据所述传输资源请求中的资源表的类 型, 定位到对应精度范围的资源表。
16.—种用于资源请求的站点 STA, 其特征在于, 包括: 封装模块, 用于将传输资源请求承载于数据帧中;
第一发送模块, 用于发送所述携带传输资源请求的数据帧。
17.如权利要求 16所述的 STA, 其特征在于, 还包括: 接收模块, 用于接收传输资源请求应答, 所述传输资源请求应答中携带 传输资源指示;
第二发送模块, 用于根据所述传输资源指示在对应的传输资源上发送数 据。
18.如权利要求 17所述的 STA, 其特征在于, 还包括: 接收模块, 用于接收传输资源请求应答, 所述传输资源请求应答中携带 传输资源指示;
资源分配模块, 与所述接收模块相连, 用于根据所述传输资源指示, 将 资源在各业务流之间进行分配; 第二发送模块, 与所述资源分配模块相连, 用于根据资源分配结果在对 应的传输资源上发送数据。
19.如权利要求 16所述的 STA, 其特征在于: 所述封装模块, 还在数据帧中封装随路请求指示, 用于指示所述传输资 源请求的存在。
20.如权利要求 19所述的 STA, 其特征在于: 所述封装模块, 将所述随路请求指示承载于所述数据帧的帧头中。
21.如权利要求 20所述的 STA, 其特征在于: 所述封装模块, 在数据帧的帧头中设置有一字段, 通过所述字段的值指 示所述传输资源请求的存在。
22.如权利要求 16所述的 STA, 其特征在于: 所述封装模块, 将所述传输资源请求承载于数据帧的帧体中。
23.所如权利要求 22所述的 STA, 其特征在于: 所述封装模块, 在数据帧的帧体中设置有一字段, 承载所述传输资源请 求。
24.如权利要求 16所述的 STA, 其特征在于: 所述封装模块, 用于在所述传输资源请求中封装一个或者多个业务流的 标识, 以及为各业务流请求的带宽资源的大小。
25.如权利要求 24所述的 STA, 其特征在于: 所述封装模块, 用于以预设的资源表中的索引指示带宽资源的大小。
26.如权利要求 25所述的 STA, 其特征在于: 所述封装模块, 还用于在所述传输资源请求中承载资源表的类型, 不同 类型的资源表具有不同的精度范围。
27.如权利要求 17所述的 STA, 其特征在于, 还包括: 重传模块,在所述第一发送模块发送所述携带传输资源请求的数据帧后, 启动计时, 如果超过预设的最大等待帧间隔后, 所述接收模块仍然没有收到 所述传输资源请求应答, 则认为本次资源请求失败, 触发所述封装模块在有 数据帧传输时, 将所述传输资源请求承载于数据帧中, 重新发起资源请求。
28.—种用于资源请求的中心接入点 CAP, 其特征在于, 包括: 接收模块, 用于接收携带传输资源请求的数据帧;
解析模块, 用于从所述数据帧中解析出所述传输资源请求;
资源分配模块, 用于根据所述传输资源请求, 为对应的站点 STA分配传 输资源;
发送模块, 用于发送传输资源请求应答给所述对应的 STA, 所述传输资 源请求应答中携带传输资源指示。
29.如权利要求 28所述的 CAP, 其特征在于, 还包括: 所述解析模块, 通过解析数据帧中的随路请求指示, 以获知传输资源请 求的存在。
30.如权利要求 29所述的 CAP, 其特征在于: 所述解析模块, 通过解析数据帧的帧头中的随路请求指示字段, 以得到 所述随路请求指示。
31.如权利要求 28所述的 CAP, 其特征在于: 所述解析模块, 通过解析数据帧的帧体, 得到所述传输资源请求。
32.所如权利要求 31所述的 CAP, 其特征在于: 所述解析模块, 通过解析数据帧的帧体中的随路资源请求字段, 以得到 所述传输资源请求。
33.如权利要求 28所述的 CAP, 其特征在于: 所述传输资源请求中包括一个或者多个业务流的标识, 以及为各业务流 请求的带宽资源的大小; 所述资源分配模块, 根据所述传输资源请求分别为所述一个或者多个业 务流分配带宽资源。
34.如权利要求 33所述的 CAP, 其特征在于: 所述带宽资源的大小以所述带宽资源在预设的资源表中的索引指示; 所述资源分配模块, 通过查找预设的资源表, 获知为各业务流请求的带 宽资源的大小。
35.如权利要求 34中任何一项所述的 CAP, 其特征在于: 所述传输资源请求中携带资源表的类型; 所述资源分配模块,在根据索引查找资源表之前,先根据资源表的类型, 定位到对应精度范围的资源表。
36.如权利要求 28所述的 CAP, 其特征在于: 所述发送模块, 用于在传输控制信道上发送所述传输资源请求应答给所 述对应的 STA。
37.如权利要求 28所述的 CAP, 其特征在于: 所述发送模块, 用于釆用单播方式发送所述传输资源请求应答给所述对 应的 STA。
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CN103444249A (zh) 2013-12-11
KR20140034178A (ko) 2014-03-19
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JP2014512748A (ja) 2014-05-22
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