WO2012130092A1 - Procédé et dispositif pour la transmission d'accusés de réception de trames - Google Patents

Procédé et dispositif pour la transmission d'accusés de réception de trames Download PDF

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Publication number
WO2012130092A1
WO2012130092A1 PCT/CN2012/072888 CN2012072888W WO2012130092A1 WO 2012130092 A1 WO2012130092 A1 WO 2012130092A1 CN 2012072888 W CN2012072888 W CN 2012072888W WO 2012130092 A1 WO2012130092 A1 WO 2012130092A1
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WIPO (PCT)
Prior art keywords
frame
response
acknowledgement
group
acknowledgment
Prior art date
Application number
PCT/CN2012/072888
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English (en)
Chinese (zh)
Inventor
鲍东山
周玉宝
姚惠娟
于晓燕
刘慎发
解晓强
阎德升
杨之佐
Original Assignee
北京新岸线无线技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN 201210053090 external-priority patent/CN103326827A/zh
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 CN201280013095.XA priority Critical patent/CN103548316B/zh
Publication of WO2012130092A1 publication Critical patent/WO2012130092A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1621—Group acknowledgement, i.e. the acknowledgement message defining a range of identifiers, e.g. of sequence numbers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information

Definitions

  • the application date is March 31, 2011, and the application number is 201110081288.6.
  • the invention name is the priority of the prior application of a wireless communication method, and the application date is May 19, 2011, and the application number is 201110130194.3.
  • the title of the invention is the priority of a prior application of a communication system, and the application is July 6, 2011, the application number is 201110189230.3, and the invention name is a priority of the prior application of a method and apparatus for retransmission.
  • the right, and the filing date is February 8, 2012, the application number is 201210027848.4, the invention name is the priority of a prior application for a method and apparatus for frame confirmation, and the filing date is March 2, 2012.
  • the application number is 201210053090.1
  • the name of the invention is the priority of a prior application for a method and apparatus for frame acknowledgment, the entire contents of which are hereby incorporated by reference.
  • the present invention relates to the field of wireless communications, and in particular, to a method and apparatus for frame acknowledgment.
  • 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. But Femto technology is moved by The 3G/LTE/WiMAX system of the mobile communication system is derived. 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 and apparatus for frame confirmation, thereby effectively ensuring successful data transmission.
  • the present invention provides a method for frame acknowledgment, including:
  • the present invention provides a method for frame acknowledgment, including:
  • the invention also provides an apparatus for frame confirmation, comprising:
  • An encapsulating module configured to encapsulate an acknowledgement response of one or more frames into a group acknowledgement response; and a sending module, configured to send the group acknowledgement response.
  • the invention also provides a method for frame confirmation, comprising:
  • the group confirmation request carries an identifier of one or more service flows and an identifier of a frame that needs to be confirmed on each service flow;
  • the invention also provides an apparatus for frame confirmation, comprising:
  • An encapsulating module configured to generate a group acknowledgment request, where the group acknowledgment request carries an identifier of one or more service flows and an identifier of a frame that needs to be confirmed on each service flow;
  • FIG. 1 is a flowchart of a method for frame confirmation according to a first embodiment of the present invention
  • FIG. 2 is a schematic diagram of a group acknowledgment frame format according to a first embodiment of the present invention
  • FIG. 3 is a schematic diagram of an ACK frame format according to a second embodiment of the present invention
  • FIG. 4 is a flowchart of a method for retransmission according to a third embodiment of the present invention
  • FIG. 5 is a schematic diagram of a G-MPDU format according to a third embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a G-MPDU subframe format according to a third embodiment of the present invention
  • FIG. 7 is a flowchart of a method for retransmission according to a fourth embodiment of the present invention.
  • FIG. 8 is a schematic diagram of a group confirmation request frame format according to a fourth embodiment of the present invention
  • FIG. 9 is a block diagram of an apparatus for frame confirmation according to a fifth embodiment of the present invention.
  • Figure 10 is a block diagram of an apparatus for frame acknowledgment in accordance with a sixth embodiment of the present invention.
  • Embodiments of the present invention provide a method for frame confirmation, which is applicable to both a management frame and a data frame. After the sender sends the frame, the receiver returns an acknowledgment response to inform the sender whether the data is successfully received, so that the data transmission success can be effectively monitored.
  • Step S101 Encapsulating an acknowledgment response of one or more frames into a group acknowledgment response (GroupAck); wherein the acknowledgement response of the frame is used to indicate the reception status of the frame, including received and not received.
  • GroupAck group acknowledgment response
  • Step S102 Send the group confirmation response.
  • the embodiment of the invention provides a group acknowledgment response mode, which encapsulates the acknowledgment responses of multiple frames into the same frame and sends out the acknowledgment mode.
  • the same frame header parameter only needs to be transmitted once, which effectively saves Transmission resources;
  • a frame (group acknowledgment) synchronization can be performed to obtain responses of multiple frames, thereby effectively saving physical transmission resources.
  • the wireless communication system supports a variety of services, and the transmission of data is transmitted according to the service flow.
  • traffic can be divided into management traffic and data traffic.
  • the management service flow is composed of one or more management frames
  • the data service flow is composed of one or more data frames. It is also possible to divide the data traffic flow into more flows according to the specific service type, such as traffic flow 1 (represented by FID1), service flow 2 (represented by FID2), and service flow n (represented by FIDn). Therefore, step S101 may further include (not shown):
  • Step S1011 Encapsulating an acknowledgement response of one or more frames on the same service flow as a service flow acknowledgement response
  • Step S1012 Encapsulate one or more service flow acknowledgement responses into a group acknowledgement response. And identifying, by the encapsulating group, an identifier of the one or more service flows, and an identifier of the one or more frames on the service flows, so that the receiving end identifies that the received group acknowledgement response is A confirmation of which frames on which traffic flow.
  • the embodiment of the present invention proposes to sequentially carry the acknowledgement response of each frame on the service flow by each bit in a bitmap.
  • the acknowledgment response of the corresponding frame is identified by the sequence number of the frame corresponding to the bit in the bitmap.
  • the receiving end determines, according to the sequence number of the frame corresponding to the bit in the bitmap, which frame is carried in the bit, and determines the content of the acknowledgement of the frame identified by the bit number according to the value of the bit.
  • the frame of the specific frame in the consecutive frames for example, the sequence number of the frame corresponding to the first bit in the bitmap, and the length of the bitmap may be used to identify the service.
  • An acknowledgment response of consecutive frames on the stream each bit in the bitmap corresponds to an acknowledgment response of one frame.
  • the length of the bitmap is not fixed, and the number of responses of the returned frame is very flexible, which further improves resource utilization.
  • the fragmentation indication information may also be set to indicate whether the corresponding bitmap carries an acknowledgement response of the fragmented frame or an unacknowledged frame acknowledgement response. That is, the embodiment of the present invention supports the acknowledgment response to the unfragmented frame, and also supports the acknowledgment response to the fragmented frame, and can also mix the acknowledgment response of the frame of the feedback fragment and the acknowledgment response of the unfragmented frame. For example, carrying in a group confirmation response '
  • FIDO and FID1 acknowledge the response, the frame on FIDO is the unfragmented frame, and the frame on FID1 is the fragmented frame. Then, the acknowledgement response of the unfragmented frame on FIDO is indicated by bitmapO, and the FID is indicated by bitmap 1. A confirmation response of the fragmented frame on 1. For another example, the acknowledgment response of FIDO and FID 1 is carried in the group acknowledgment response, the frame on the FIDO includes the unfragmented frame and the fragmented frame, and the frame on the FID1 is the unfragmented frame, and the FIDO is indicated by the bitmapO.
  • the acknowledgment response of the unfragmented frame indicates that the acknowledgment response of the fragmented frame on FIDO is indicated by bitmap 1, and the acknowledgment response of the unfragmented frame on FID 1 is indicated by bitmap2.
  • the group confirmation frame shown in FIG. 2 includes a frame header, a frame body, and frame calibration information (FCS).
  • the frame header contains frame control information, such as a frame type (management frame or data frame), a subtype (specific management frame type, or a specific data frame type), version information, etc.; the frame body contains one or more FID information.
  • the FID information block includes a service flow identifier, a sequence number, and a bitmap, where the bitmap is used to carry an acknowledgment response of consecutive frames, and each bit of the bitmap+ is acknowledgment response of one frame, the sequence number A sequence number indicating a frame corresponding to the first bit in the bitmap.
  • each FID information block is set according to the length of the bitmap; the length of the bitmap is not fixed.
  • a length field of the bitmap is further set in the FID information block to indicate the length of the bitmap.
  • the fragmentation indication information is further set in the FID information block to indicate that the bitmap carries an acknowledgement response of the fragmented frame, or an acknowledgement response of the unfragmented frame.
  • a management control frame acknowledge bit is further set in the frame body for confirming receipt of a no-sequence number management control frame.
  • a length field may be set in the frame body for indicating the total byte length of all fields between the length field and the FCS field, i.e., indicating the sum of the lengths of all FID information blocks.
  • Table 1 for the definition of each parameter in the frame body.
  • Length 12 represents the total byte length of all fields between the length field and the FCS field.
  • FID 4 informs the sender that the FID information block is for a certain FID service. The flow is confirmed by the GroupAck.
  • the SSN 12 notifies the sender of the start sequence number of the Bitmap of the FID block.
  • Bitmap 4 indicates the length of the Bitmap for each FID block. Length
  • each bit in the slice Bitmap is a slice for a frame to confirm.
  • a 0 indicates that the acknowledgment is for the unfragmented data frame. At this point, each bit in the Bitmap is acknowledged for a certain frame.
  • a bit in Bitmap 8/16/32/Bitmap indicates whether an MPDU or fragment is successfully received. Successful reception is set to 1. Otherwise, 64/128/256 is set to 0.
  • the MPDU sequence number or fragment number is based on SSN and offset. The amount is calculated.
  • the acknowledgement response of the frame is used to indicate the reception status of the frame, including received and not received si
  • the immediate confirmation request may be a request frame format agreed by both parties.
  • the immediate confirmation request may be a group confirmation request, carrying an identifier of one or more service flows, and an identifier of one or more frames on each service flow, to indicate that the finger on the specified service flow is immediately returned.
  • a confirmation response for the frame Immediately after receiving the group acknowledgment request, it returns an acknowledgment response for the specified frame on the specified data stream.
  • the immediate confirmation request may also be an indication bit agreed by both parties.
  • a field in the contracted data frame is an immediate confirmation indicator.
  • the immediate confirmation indication is set to be carried in a frame header of the data frame.
  • the confirmation frame is immediately returned, and is returned in the next time period.
  • the central access point (CAP) and the station (STA) may be the transmitting end and the receiving end of each other.
  • 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) function interface and can communicate with the CAP.
  • the transmitting and receiving dual-ends communicate through physical frames, and each physical frame period includes a downlink period and an uplink period in sequence: the CAP sends data to the STA in a downlink period; the STA sends data to the CAP in an uplink period.
  • the indicated immediate return duration that is, the next time period, means that the uplink physical frame period corresponds to the downlink physical frame period, or the downlink physical frame period corresponds to the previous one.
  • the uplink period of the physical frame when the sending end is a CAP, when the data frame carrying the immediate acknowledgement indication is sent in the downlink physical period of the current frame, the immediate acknowledgement indication is used to instruct the STA to return a frame acknowledgement in the uplink physical period of the current frame.
  • the sending end is the STA
  • the data frame carrying the immediate acknowledgement indication is sent in the uplink physical period of the current frame, and the immediate acknowledgement indication is used to indicate that the CAP returns a frame acknowledgement response in the downlink physical period of the next frame.
  • an indication bit is agreed by both parties, and the explicit indication is delayed confirmation.
  • a field in the contracted data frame is a delayed acknowledgement indicator.
  • the frame acknowledgement interval using delayed acknowledgement is determined by the sender and can be sent when there are free resources.
  • the unicast management control frame without the corresponding response frame needs to be acknowledged by using ACK or group acknowledgement frame (GroupAck), otherwise it is directly confirmed by the corresponding response frame.
  • GroupAck group acknowledgement frame
  • the embodiment of the present invention further provides some management frame request frames and corresponding response frames, as shown in Table 2. Of course, in another embodiment, other management request frames and their corresponding responses may be set as needed, and the present invention is not limited herein.
  • All non-broadcast management control frames need to send an acknowledgment frame or an implicit acknowledgment.
  • Implicit acknowledgment means that the acknowledgment frame can be treated as a acknowledgment frame for a unicast management control frame with a corresponding response frame.
  • the non-broadcast management control frame does not need to be immediately confirmed, and the response frame can be responded to within the maximum number of physical frames allowed thereafter.
  • the response frame sent by the CAP does not receive the acknowledgement frame of the STA.
  • the response frame may be retransmitted before the preset maximum number of retransmissions. The number of retransmissions exceeds the preset maximum number of retransmissions.
  • the data frame is determined by the sender using immediate acknowledgement and delayed acknowledgement.
  • the receiving end can indicate whether an immediate confirmation is needed according to the field indicating the frame confirmation mode set in the MAC header.
  • the frame confirmation wait interval is a time period using the immediately acknowledged frame.
  • the frame acknowledgment interval using delayed acknowledgment is determined by the sender
  • the confirmation mode is immediate confirmation
  • the data frame may be retransmitted before the preset maximum number of retransmissions is reached, and the number of retransmissions exceeds the preset maximum number of retransmissions. After that, the sender will discard the frame.
  • the next time period mentioned here may be that the uplink physical frame period corresponds to the downlink physical frame period, or the downlink physical frame period corresponds to the uplink period of the previous physical frame.
  • the immediate acknowledgement indication is used to indicate that the frame acknowledgement response is returned in the uplink physical period of the current frame; and the bearer is sent in the uplink physical period of the current frame.
  • the immediate acknowledgement indication is used to indicate that the frame acknowledgement response is returned in the downlink physical period of the next frame.
  • the acknowledgement mode is delayed acknowledgement
  • the data frame may be retransmitted before the preset maximum number of retransmissions is reached, and the number of retransmissions exceeds the preset number. After the maximum number of retransmissions, the sender will discard the frame.
  • the embodiment of the present invention further provides another frame confirmation mode (ACK frame;), which is suitable for confirming for a single frame.
  • ACK frame includes a frame header, a frame body, and frame check information (FCS).
  • the frame header includes frame control information, such as a frame type (management frame or data frame), a subtype (specific management frame type, or a specific data frame type), version information, and the like; the frame body includes the FID and the fragment number ( FSN), frame sequence number (SN). Refer to Table 3 for the definition of each parameter in the frame body.
  • frame control information such as a frame type (management frame or data frame), a subtype (specific management frame type, or a specific data frame type), version information, and the like
  • the frame body includes the FID and the fragment number ( FSN), frame sequence number (SN). Refer to Table 3 for the definition of each parameter in the frame body.
  • An embodiment of the present invention provides a retransmission method, as shown in FIG. 4, including the following steps: Step S401: Cache a transmitted frame;
  • Step S402 Receive and parse the frame acknowledgement response.
  • Step S403 Retransmit the buffered frame and not acknowledge the received frame.
  • the retransmission method provided by the embodiment of the present invention maintains the retransmitted data by the transmitting end. When retransmitting, only the unacknowledged received frame is retransmitted, and the already received frame is not retransmitted. Especially when retransmitting data according to the preset window, the frame that has been confirmed to have been acknowledged in the window is not retransmitted, which greatly saves transmission resources.
  • frames that have been acknowledged to be received in the buffered frame may be deleted. This effectively saves local cache resources.
  • one or more consecutive frames may be encapsulated into a framing (G-MPDU) transmission.
  • the G-MPDU is composed of a series of G-MPDU subframes.
  • the G-MPDU subframe includes the G-MPDU delimiter, MPDU, and possibly padding bytes.
  • each G-MPDU sub-frame needs to be boosted. 0 ⁇ 1 padding bytes, making each The length of the G-MPDU subframe is an integer multiple of 2 bytes.
  • the G-MPDU delimiter shown is used to locate the MPDU unit of the G-MPDU. Multiple frames are encapsulated and sent out. When transmitting on a physical channel, multiple frames can be obtained by performing synchronization of one frame (frame), thereby effectively saving physical transmission resources.
  • the frame acknowledgment response received in step S402 may be the group acknowledgment response provided by the first embodiment, or may be the acknowledgment response of the single frame provided in the second embodiment.
  • the embodiment of the present invention further provides a method for retransmission, which increases the buffering capability of the local end, and may detect that the buffering capability may exceed the risk. , promptly notify the peer to return the response immediately, as shown in Figure 7, including the steps:
  • Step S701 Cache a frame that does not receive the acknowledgement response; Step S701: Determine whether the cache capacity threshold is reached;
  • Step S701 When the buffer capacity threshold is reached, an immediate acknowledgement request is sent to indicate that the frame acknowledgement response is immediately returned.
  • the immediate acknowledgement request carries an identification of one or more traffic flows, and an identification of one or more frames on each traffic flow to indicate an immediate acknowledgement of the acknowledgment of the specified frame on the designated data stream.
  • the immediate acknowledgement request may carry the sequence number of the first frame on each service flow that needs to return a response, to instruct the peer end to return an acknowledgement response of the frame from the first frame on the service flow.
  • the embodiment of the present invention further provides a specific frame format of the immediate confirmation request, as shown in FIG. 8.
  • the immediate acknowledge request frame shown in Figure 8 includes a frame header, a frame body, and frame check information (FCS).
  • the frame header contains frame control information, such as a frame type (management frame or data frame), a subtype (specific management frame type, or a specific data frame type), version information, etc.;
  • the frame body contains one or more FID information.
  • each FID information block includes a service flow identifier FID and a sequence number, where the sequence number is a sequence number of the first frame of the service that needs to return an acknowledgement response, to indicate that the peer end returns an acknowledgement response from the first frame, and implements
  • the sequence number of the frame corresponding to the first bit of the bitmap in the group confirmation provided in the first example corresponds.
  • Table 4 Field Length (ratio Description
  • FID 4 indicates the number of FID information blocks included between this field and the FCS.
  • the format of each FID information block is the same.
  • FID 4 requires the receiving end to perform GroupAck confirmation on the FID service flow.
  • SSN 12 notifies the receiving end to use this value when GroupAck confirms
  • the embodiment of the present invention further provides another manner for implementing an immediate acknowledgement request: by transmitting an immediate acknowledgement indication in a data frame, sending the data frame with an immediate acknowledgement request; the immediate acknowledgement indication, Used to indicate that the frame confirmation response is returned immediately.
  • the immediate acknowledgement indication can be carried in the frame header of the data frame.
  • the immediate return frame acknowledgement response returns the group acknowledgement response in the next time period.
  • the next time period refers to an uplink physical frame period corresponding to a downlink physical frame period, or a downlink physical frame period corresponding to an uplink period of a previous physical frame. That is, when the data frame carrying the immediate acknowledgment indication is sent in the downlink physical period of the current frame, the immediate acknowledgment indication is used to indicate that the peer end returns a frame acknowledgment response in the uplink physical period of the current frame; When the data frame carrying the immediate acknowledgement indication is sent, the immediate acknowledgement indication is used to indicate that the peer end returns a frame acknowledgement response in the downlink physical period of the next frame.
  • the delay confirmation indication is carried in the data frame when the buffer capacity threshold is not reached, and is sent out along with the data frame.
  • the delayed acknowledgement indication is used to indicate an acknowledgement response that allows a delay to return all unacknowledged data frames on each traffic flow.
  • the peer parses the data frame, if the delay acknowledgement instruction is parsed from the data frame, all unacknowledged frame acknowledgement responses on each service flow are returned when there is an idle resource.
  • the embodiment of the present invention further provides a selection of a frame acknowledgment transmission timing, where the central access point (CAP) and the station (STA) can be mutually a transmitting end and a receiving end, and specifically include:
  • the CAP sends a management control frame (requires acknowledgment) to the STA, the CAP needs to reserve resources for the acknowledgment frame when scheduling the uplink transmission resource, ensuring that the STA has the opportunity to successfully send the acknowledgment frame.
  • the CAP needs to reserve resources for the GroupAck frame or the ACK frame when scheduling the uplink transmission resource.
  • the STA may actively transmit the GroupAck frame when the uplink transmission resource has remaining, or may wait to receive the message.
  • the GroupAck frame is returned after the CAP sends an immediate confirmation notification.
  • the STA sends a management control frame (requires confirmation) to the CAP, the CAP should be under The downlink physical period of one frame is confirmed.
  • the Bay's CAP sends a GroupAck frame or an ACK frame in the downlink physical period of the next frame.
  • the CAP may actively return the GroupAck frame when the downlink transmission resource has remaining, or may wait for receiving.
  • the GroupAck frame is returned after the STA sends an immediate confirmation notification.
  • the present invention further provides an apparatus for frame acknowledgment, as shown in FIG. 9, including: a packaging module 901, configured to encapsulate an acknowledgement response of one or more frames into a group acknowledgement
  • the sending module 902 is configured to send the group acknowledgement response.
  • the encapsulating module 901 is configured to encapsulate an acknowledgement response of one or more frames on the same service flow as a service flow acknowledgement response; and encapsulate one or more of the service flow acknowledgement responses into a group acknowledgement response.
  • the encapsulating module 901 is configured to encapsulate a frame header, a frame body, and an FCS of the group acknowledgement response: set one or more FID information blocks in the frame body, where the service flow confirmation response includes a service flow identifier, a sequence number and a bitmap bitmap, wherein the bitmap is used to carry an acknowledgment response of consecutive frames, each bit in the bitmap corresponds to an acknowledgment response of one frame, and the sequence number is used to indicate that the first bit in the bitmap corresponds to The serial number of the frame.
  • the encapsulating module 901 is configured to set each FID information block according to the length of the bitmap; the length of the bitmap is not fixed.
  • the encapsulating module 901 further sets a length field of the bitmap in the FID information block to indicate the length of the bitmap.
  • the encapsulating module 901 further sets fragmentation indication information in the FID information block to indicate an acknowledgement response of the frame that is carried in the bitmap, or an acknowledgement of an unfragmented frame. Answer.
  • the encapsulating module 901 further sets a management control frame acknowledgement bit in the group acknowledgement response for confirming receipt of a no-serial number management control frame.
  • the encapsulating module 901 further sets a length field in the frame body for indicating the sum of the lengths of all the FID information blocks.
  • the acknowledgement response of the frame is used to indicate the reception status of the frame, including received and not received.
  • the method further includes: a first control module 904, configured to receive an immediate acknowledgement request, and control the encapsulation module 901 to encapsulate the group acknowledgement response, and control the transmit module 902 to immediately send the encapsulated group acknowledgement response.
  • a first control module 904 configured to receive an immediate acknowledgement request, and control the encapsulation module 901 to encapsulate the group acknowledgement response, and control the transmit module 902 to immediately send the encapsulated group acknowledgement response.
  • the immediate confirmation request carries an identifier of one or more service flows, and an identifier of one or more frames on each service flow; the first control module 904, according to the immediate confirmation request control
  • the encapsulation module 901 encapsulates an acknowledgment response specifying a frame on the data stream as a group acknowledgment response.
  • the immediate transmission is to return the group confirmation response in a next time period.
  • the next time period means that the uplink physical frame period corresponds to the downlink physical frame period, or the downlink physical frame period corresponds to the uplink period of the previous physical frame.
  • the first control module 904 when receiving the immediate acknowledgement request from the downlink physical period of the current frame, controls the sending module 902 to send the encapsulated group acknowledgement response in the uplink physical period of the current frame;
  • the sending module 902 is controlled to send the encapsulated group acknowledgement response in the downlink physical period of the next frame.
  • the method further includes:
  • the second control module 904 is configured to receive a data frame carrying an immediate acknowledgement indication, control the encapsulation module 901 to encapsulate the group acknowledgement response according to the immediate acknowledgement indication, and control the sending module 902 to immediately send the encapsulated group acknowledgement response.
  • the second control module 904 is configured to control the encapsulating module 901 to encapsulate an acknowledgment response of all unacknowledged frames on each service flow into a group acknowledgment response, and control the sending module 902 to immediately send the encapsulation.
  • the group confirms the response.
  • the second control module 904 obtains the immediate confirmation indication by parsing the frame header of the data frame.
  • the immediate sending is to return the group acknowledgement response in a next time period; the next time period is that the uplink physical frame period corresponds to a downlink physical frame period, or the downlink physical frame period corresponds to a previous physical period The up period of the frame. That is, the second control module 904, when receiving the data frame carrying the immediate acknowledgement indication from the downlink physical period of the current frame, controls the sending module 902 to send the encapsulated group acknowledgement response in the uplink physical period of the current frame; When receiving the data frame carrying the immediate acknowledgement indication from the uplink physical period of the current frame, the transmitting module 902 is controlled to transmit the encapsulated group acknowledgement response in the downlink physical period of the next frame.
  • the method further includes:
  • a third control module 905 configured to receive a data frame carrying a delay confirmation indication, according to the delay The indication indicates that the encapsulation module 901 encapsulates the group acknowledgment response when there is an idle resource, and controls the sending module 902 to send the encapsulated group acknowledgment response.
  • the present invention further provides another apparatus for frame confirmation, as shown in FIG. 10, including:
  • the encapsulating module 1001 is configured to generate a group acknowledgment request, where the group acknowledgment request carries an identifier of one or more service flows and an identifier of a frame that needs to be confirmed on each service flow; and a sending module 1002, configured to send the group acknowledgment request .
  • the encapsulating module 1001 is configured to encapsulate a group confirmation request frame to generate the group confirmation request.
  • the group confirmation request includes a frame header, a frame body, and an FCS, where the frame body includes one or more FID information blocks, and each FID information block includes a service flow identifier FID and a sequence number, and the service flow needs to be answered.
  • the sequence number of the first frame is used as the identifier of the frame to be acknowledged on the service flow, indicating that the frame acknowledgement is returned from the first frame.
  • the encapsulating module 1001 further sets an FID number field in the group confirmation request to indicate the number of FID information blocks included in the frame body.
  • the group acknowledgment request is used to indicate that the acknowledgment response of the specified frame on the specified data stream is immediately returned.
  • the immediate return group acknowledgement response is to return the group acknowledgement response in a next time period; the next time period is that the uplink physical frame period corresponds to a downlink physical frame period, or the downlink physical frame period corresponds to The upstream period of the last physical frame.
  • the sending module 1002 sends a group acknowledgment request in the downlink physical period of the current frame
  • the immediate acknowledgment indication is used to indicate that the frame acknowledgment response is returned in the uplink physical period of the current frame
  • the sending module 1002 is in the current frame
  • the uplink physical period sends a group acknowledgment request
  • the immediate acknowledgment indication is used to indicate that the frame acknowledgment response is returned in the downlink physical period of the next frame.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)

Abstract

L'invention concerne un procédé et un dispositif pour la transmission d'accusés de réception de trames Le procédé consiste à grouper une réponse d'accusé de réception d'une ou de plusieurs trames en une réponse d'accusé de réception groupée, puis à transmettre la réponse d'accusé de réception groupée. Le procédé réduit les ressources de transmission occupées par l'accusé de réception de trame et il garantit une transmission de données réussie.
PCT/CN2012/072888 2011-03-31 2012-03-23 Procédé et dispositif pour la transmission d'accusés de réception de trames WO2012130092A1 (fr)

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CN201110189230.3 2011-07-06
CN201210027848 2012-02-08
CN201210027848.4 2012-02-08
CN201210053090.1 2012-03-02
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