US9270792B2 - Method and system for improving wireless link efficiency - Google Patents

Method and system for improving wireless link efficiency Download PDF

Info

Publication number
US9270792B2
US9270792B2 US13/830,385 US201313830385A US9270792B2 US 9270792 B2 US9270792 B2 US 9270792B2 US 201313830385 A US201313830385 A US 201313830385A US 9270792 B2 US9270792 B2 US 9270792B2
Authority
US
United States
Prior art keywords
packets
aggregate frame
sequence number
packet
respective packet
Prior art date
Legal status (The legal status 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 status listed.)
Active, expires
Application number
US13/830,385
Other languages
English (en)
Other versions
US20140140228A1 (en
Inventor
Sriram Dayanandan
Darius Ivanauskas
Mindaugas Kriauciunas
Antanas Gadeikis
Kestutis Barkauskas
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ubiquiti Inc
Original Assignee
Ubiquiti Networks Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ubiquiti Networks Inc filed Critical Ubiquiti Networks Inc
Priority to US13/830,385 priority Critical patent/US9270792B2/en
Assigned to UBIQUITI NETWORKS, INC. reassignment UBIQUITI NETWORKS, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DAYANANDAN, SRIRAM, GADEIKIS, ANTANAS, IVANAUSKAS, DARIUS, KRIAUCIUNAS, MINDAUGAS, BARKAUSKAS, KESTUTIS
Priority to ARP130104050A priority patent/AR093370A1/es
Priority to US14/082,006 priority patent/US9386129B2/en
Priority to ES13798516T priority patent/ES2728172T3/es
Priority to CN201310577230.XA priority patent/CN103812606B/zh
Priority to EP19160387.7A priority patent/EP3528409B1/de
Priority to LTEP13798516.4T priority patent/LT2923514T/lt
Priority to EP13798516.4A priority patent/EP2923514B1/de
Priority to BR112015011501-2A priority patent/BR112015011501B1/pt
Priority to CN201410377193.2A priority patent/CN104244324B/zh
Priority to PL19160387.7T priority patent/PL3528409T3/pl
Priority to EP23183330.2A priority patent/EP4351208A1/de
Priority to PL13798516T priority patent/PL2923514T3/pl
Priority to PCT/US2013/070626 priority patent/WO2014081676A1/en
Publication of US20140140228A1 publication Critical patent/US20140140228A1/en
Publication of US9270792B2 publication Critical patent/US9270792B2/en
Application granted granted Critical
Priority to US15/098,223 priority patent/US9985749B2/en
Priority to US15/968,238 priority patent/US10826654B2/en
Priority to CY20191100557T priority patent/CY1122353T1/el
Assigned to UBIQUITI INC. reassignment UBIQUITI INC. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: UBIQUITI NETWORKS, INC.
Active legal-status Critical Current
Adjusted expiration legal-status Critical

Links

Images

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
    • H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/0703—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation
    • G06F11/0706—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation the processing taking place on a specific hardware platform or in a specific software environment
    • G06F11/0709—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation the processing taking place on a specific hardware platform or in a specific software environment in a distributed system consisting of a plurality of standalone computer nodes, e.g. clusters, client-server systems
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/0703—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation
    • G06F11/0751—Error or fault detection not based on redundancy
    • G06F11/0754—Error or fault detection not based on redundancy by exceeding limits
    • G06F11/076—Error or fault detection not based on redundancy by exceeding limits by exceeding a count or rate limit, e.g. word- or bit count limit
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/0703—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation
    • G06F11/0793—Remedial or corrective actions
    • 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
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
    • 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
    • H04L1/1614—Details of the supervisory signal using bitmaps
    • 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
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1887—Scheduling and prioritising arrangements
    • 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
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/189—Transmission or retransmission of more than one copy of a message
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0823—Errors, e.g. transmission errors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L49/00—Packet switching elements
    • H04L49/90—Buffering arrangements
    • H04L49/9057—Arrangements for supporting packet reassembly or resequencing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
    • H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
    • H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
    • H04L69/324—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the data link layer [OSI layer 2], e.g. HDLC
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]

Definitions

  • This disclosure is generally related to wireless networks. More specifically, this disclosure is related to a method and system for improving transmission efficiency in a wireless link.
  • Wi-Fi networks which are based on the IEEE-802.11 family of standards, are becoming increasingly ubiquitous.
  • TCP Transmission Control Protocol
  • Wireless networks such as IEEE 802.11a/b/g/n/ac networks, however, require explicit acknowledgement from the receiver for every packet due to the unreliable nature of the communication medium.
  • IEEE 802.11a/b/g/n/ac networks use carrier sense multiple access with collision avoidance (CSMA/CA) before beginning any transmission in order to avoid collision with other transmitters. These requirements often lead to low transmission efficiency in IEEE 802.11 wireless links.
  • CSMA/CA carrier sense multiple access with collision avoidance
  • One embodiment of the present invention provides a system for improving transmission efficiency of a wireless link.
  • the system receives a packet for transmission, where in the packet includes an original sequence number.
  • the system modifies the packet by including a virtual sequence number in a header of the packet and including the original sequence number in a payload of the modified packet.
  • the system further aggregates a number of modified packets into an aggregate frame and transmits the aggregate frame to a destination device.
  • the virtual sequence number facilitates stateless transmission of the encapsulated packets and allows the aggregate frame to have a maximum allowable number of packets while accommodating both re-transmitted packets and regular packets.
  • the aggregate frame includes packets associated with different original traffic categories.
  • the packet includes an original traffic category indicator.
  • modifying the packet further involves including a virtual traffic category indicator in the header of the packet and including the original traffic category indicator in the payload of the modified packet.
  • all the modified packets in the aggregate frame have the same virtual traffic category indicator.
  • the system monitors an error rate for a respective original traffic category.
  • the system duplicates, in the aggregate frame, a number of modified packets associated with the original traffic category for which the error rate is monitored, in response to the error rate surpassing a predetermined threshold.
  • the wireless link is an IEEE 802.11 wireless link.
  • One embodiment of the present invention provides a system for improving transmission efficiency of a wireless link.
  • the system receives an aggregate frame which comprises a number of modified packets.
  • Each modified packet includes a virtual sequence number and a virtual traffic category identifier in the packet's header, and an original sequence number and an original traffic category identifier in the modified packet's payload.
  • the system then de-aggregates the modified packets from the aggregate frame.
  • the system decapsulates all the modified packets and orders the decapsulated packets based on their original sequence number and original traffic category indicator.
  • the original sequence numbers of the packets in the aggregate frame are non-continuous.
  • the packets in the aggregate frame are associated with different original traffic categories.
  • the virtual sequence numbers of the packets in the aggregate frame are continuous.
  • FIG. 1A illustrates an example of transmitting three packets in an IEEE 802.11a/b/g network.
  • FIG. 1B illustrates an example of transmitting three aggregate frames in an IEEE 802.11n network.
  • FIG. 2A illustrates a retransmission process in a conventional wireless network where the first four packets in an aggregate frame, which includes 64 packets, are not received successfully.
  • FIG. 2B illustrates a retransmission process in a conventional wireless network where four packets in the middle of an aggregate frame, which includes 64 packets, are not received successfully.
  • FIG. 2C illustrates a retransmission process in a conventional wireless network where four packets in the tail of an aggregate frame, which includes 64 packets, are not received successfully.
  • FIG. 3A presents a block diagram illustrating the operation of aggregating multiple packets and transmitting the aggregate frame over a wireless link to a receiver.
  • FIG. 3B illustrates a conventional IEEE 802.11n packet header format.
  • FIG. 4A presents a block diagram illustrating the operation of aggregating multiple packets with virtual sequence headers and transmitting the aggregate frame over a wireless link to a receiver, in accordance with one embodiment of the present invention.
  • FIG. 4B presents a modified IEEE 802.11n header that facilitates virtual sequence number of virtual traffic ID (TID), in accordance with one embodiment of the present invention.
  • FIG. 5 presents a flowchart illustrating the process of reserving packet slots in an aggregate frame based on detected packet error rate associated with a traffic category, in accordance with one embodiment of the present invention.
  • FIG. 6 illustrates an exemplary transceiver system that facilitates virtual sequence number for wireless transmission in an IEEE 802.11 wireless link, in accordance with one embodiment of the present invention.
  • Some embodiments of the present invention enhance the transmission efficiency in IEEE 802.11 wireless links by using virtual sequence numbers for packets transmitted in an aggregate frame, which allows packets to be retransmitted with other regular packets in an aggregate frame that can accommodate the maximum number of packets.
  • the virtual sequence number can be arbitrary, and be selected in such a way that allows any number of packets to be retransmitted with other regular packets in the same aggregate frame which is not limited by the acknowledgement window and can be filled up to the maximum allowable number of packets.
  • FIG. 1A illustrates an example of transmitting three packets in an IEEE 802.11a/b/g network, which does not provide aggregated packet transmission.
  • a transmitter when a transmitter has packets to transmit, it first waits for a fixed amount of delay (denoted as arbitration inter-frame spacing, AIFS).
  • AIFS arbitration inter-frame spacing
  • the AIFS duration may vary based on traffic category.
  • the transmitter further waits for a random period of time, denoted as random backoff 101 .
  • random backoff 101 if the transmitter detects another transmission via the same communication medium, the transmitter will wait until the detect transmission is finished, and then continues the random backoff 101 countdown.
  • the transmitter can transmit a packet 102 .
  • the receiver waits for a small time interval (denoted as short interframe space, SIFS), before sending an acknowledgement 104 . Subsequently, the transmitter waits for another AIFS and random backoff before transmitting a packet 106 .
  • SIFS short interframe space
  • the receiver waits for an SIFS before sending ACK 108 .
  • the transmitter can transmit the next packet 110 , and receives a corresponding 112 .
  • the transmission of a single packet requires a significant amount of idle waiting (AIFS, random backoff, and SIFS). Furthermore, each packet requires a separate ACK. These requirements incur a significant overhead for transmission.
  • an aggregate frame includes multiple packets to the same destination, which are combined into a single transmission unit.
  • an aggregate frame can include up to 64 packets.
  • the receiver waits for a fixed amount of delay (SIFS) before sending a block acknowledgement (BLOCK ACK).
  • a BLOCK ACK contains a beginning sequence number, which corresponds to the sequence number of the earliest packet in the aggregate frame, and a bitmap corresponds to all the packets encapsulated in the aggregate frame. Note that a BLOCK ACK can only acknowledge a continuous number of packets, due to the sequential nature of the bitmap.
  • FIG. 1B illustrates an example of transmitting three aggregate frames in an IEEE 802.11n network.
  • the transmitter transmits aggregate frame 122 .
  • the receiver waits for SIFS and sends back a BLOCK ACK 124 .
  • a similar process take place when the transmitter transmits aggregate frame 126 and aggregate frame 130 .
  • the receiver sends back corresponding BLOCK ACKS 128 and 132 .
  • the packet aggregation mechanism in IEEE 802.11n is expected to improve the transmission efficiency of the wireless link to about 65%, compared with 40% in IEEE 802.11a/b/g. This improvement is mainly due to the amortization of the various overhead over a group of packets in 802.11n, as opposed to a single packet in 802.11a/b/g.
  • the aggregation and block acknowledgement mechanism in 802.11n still have some drawbacks.
  • the transmitter and receiver typically negotiate the BLOCK ACK window (BAW), which is the maximum length of the transmission history for retransmissions. This window imposes a limit on the end throughput.
  • BAW BLOCK ACK window
  • the packet aggregation is on a per-traffic category (or traffic category) basis (in 802.11n terminology, on a per traffic identifier, or TID, basis).
  • TID traffic identifier
  • FIGS. 2A , 2 B, and 2 C illustrate how the BAW can restrict the end throughput.
  • FIG. 2A illustrates a retransmission process in a conventional wireless network where the first four packets in an aggregate, which includes 64 packets, are not received successfully.
  • the sender transmits an aggregate frame containing 64 packets with the same TID, with sequence numbers 1 to 64. Packets with sequence numbers 65 and up are stored in a queue, assuming that the BAW is 64. Assume that the receiver receives the aggregate frame. However, packets 1 to 4 are received with an error (as indicated by a shaded pattern in FIG. 2A ). The receiver then sends the BLOCK ACK to the sender.
  • the sender retransmits packets 1 to 4 in the next aggregate frame.
  • the BAW is 64
  • the BLOCK ACK can only acknowledge a group of continuous 64 packets
  • the retransmitted aggregate frame cannot accommodate any packet with sequence number higher than 64.
  • the total number packets in the retransmitted aggregate frame is 4, and the aggregate frame cannot carry any new packet. This error scenario can reduce the link efficiency by 50%.
  • FIG. 2B illustrates a retransmission process in a conventional wireless network where four packets in the middle of an aggregate frame, which includes 64 packets, are not received successfully.
  • the sender transmits an aggregate frame with packets of sequence numbers 1 to 64.
  • the receiver receives the aggregate frame, assume that packets 15 to 18 are in error.
  • the receiver then sends a BLOCK ACK to the sender indicating that these four packets need to be retransmitted.
  • the sender assembles a retransmission aggregate frame, starting with packets 15 to 18.
  • the sender can also include packets 65 to 78 in the same aggregate frame, as allowed by the BAW (that is, the receiver can subsequently acknowledge packets 15 to 78).
  • the total number of packets in the retransmission frame is 18, 14 of which are new packets.
  • the link efficiency is reduced by 40% due to the above error scenario.
  • FIG. 2C illustrates a retransmission process in a conventional wireless network where four packets in the tail of an aggregate frame, which includes 64 packets, are not received successfully.
  • the sender initially sends packets 1 to 64. Assume that packets 61 to 64 are received in error. The receiver then sends back a BLOCK ACK indicating that packets 61 to 64 need to be retransmitted. In response, the sender assembles a retransmission aggregate frame, which contains packets 61 to 64.
  • the sender can also include frames 65 to 124 in the same aggregate frame, since the BAW allows 64 continuous packets.
  • the retransmission frames includes a total number of 64 packets, 60 of which are new packets. The link efficiency is reduced by only 4% due to the above error scenario.
  • the wireless link's transmission efficiency can vary from 50% to 96% of its designed value, even with a packet error rate as low as 6.25% (4 error packets out of 64). This is because the BLOCK ACK can only acknowledge a group of continuous packets, which prevents the retransmission aggregate frame from fully utilizing the maximum slots allowed by the BAW. Real-world wireless links, especially outdoor ones, can exhibit far higher packet error rates, resulting in further degraded link efficiency.
  • a further limitation of the 802.11n aggregation mechanism is that it only allows an aggregate frame to carry packet from the same traffic category (i.e., with the same TID). For example, if the sender needs to transmit 64 packets in TID 0 and 2 packets in TID 1. Assuming TID 1 is associated with a higher priority than TID 0, the sender will assemble a first aggregate frame with only 2 packets from TID 0, despite the fact that it has 64 packets in TID 0 waiting to be transmitted. These aggregate frames still need to go through the standard fixed/random delays and BLOCK ACK mechanisms separately. Hence, even under excellent transmission conditions the link usage efficiency is reduced.
  • Embodiments of the present invention solve the aforementioned problems by using virtual sequence numbers and virtual TIDs in the aggregate frame, which allows the sender to fully utilize the maximum number of packet slots in an aggregate frame allowed by the BAW, even when retransmitting packets.
  • the original sequence number and TID are moved to the payload portion of each 801.11n packet.
  • the sequence number and TID fields in each packet's 802.11n header are updated with the virtual sequence number and TID values.
  • FIG. 3A and its corresponding description below explain the operation of transmitter and receiver in accordance with the existing 802.11n standard.
  • FIG. 4 and its corresponding description explain the operation of the transmitter and receiver using the virtual sequence numbers and TIDs, in accordance with embodiments of the present invention.
  • a transmitting station 301 includes a network protocol stack 302 , and 802.11 encapsulation module 304 , a set of per TID queues 306 , a per TID aggregation release module 308 , and a transmitter 310 .
  • a receiving station 321 includes a receiver 312 , a set of per-TID de-aggregation reorder buffers 314 , a per TID de-aggregation release module 316 , a 802.11 decapsulation module 318 , and a network protocol stack 320 .
  • network protocol stack 302 assembles traffic from upper layers (such as TCP/IP) into layer-2 packets.
  • 802.11 encapsulation module 304 encapsulates the packets with 802.11 headers (which are described in more detail in conjunction with FIG. 3B ).
  • Per TID aggregation queues 306 temporarily store the packets, based on their respective TIDs, in separate queues while waiting for the transmission medium to be available for transmission (e.g., when the system waits for AIFS and random backoff).
  • per TID aggregation release module 308 selects a TID-specific queue (which can be based on a traffic prioritization policy) and releases an aggregate frame which contains packets from the selected queue. Transmitter 310 then transmits the aggregate frame via a wireless link to receiver 312 .
  • the packets in the aggregate frame are de-aggregated, reordered, and stored in one of the per TID buffers 314 .
  • the packets are temporarily stored in per TID buffers 314 while waiting for the upper-layer modules are ready to retrieve the packets.
  • per TID de-aggregation release module 316 releases the packets in a particular per TID buffer, upon which 802.11 decapsulation module 318 removes the 802.11 headers from the packets.
  • the decapsulated packets are forwarded to network protocol stack 320 .
  • FIG. 3B illustrates a conventional IEEE 802.11n packet header format.
  • each packet is encapsulated with an IEEE 802.11n header before it is aggregated into an aggregate frame.
  • an IEEE 802.11n header includes a frame control (FC) field, a duration/ID (DUR-ID) field, four address fields (ADDR1, ADDR2, ADDR3, and ADDR4), a sequence control field (SEQ-CTRL), a QoS control field (QOS-CTRL), and a SubNetwork Access Protocol header (SNAP-HDR).
  • FC frame control
  • DUR-ID duration/ID
  • ADDR1 address fields
  • SEQ-CTRL sequence control field
  • QOS-CTRL QoS control field
  • SNAP-HDR SubNetwork Access Protocol header
  • the FC field contains control information used for defining the type of 802.11 MAC frame and providing information necessary for the following fields to understand how to process the MAC frame.
  • the DUR-ID field is used for all control type frames, except with the subtype of Power Save (PS) Poll, to indicate the remaining duration needed to receive the next frame transmission.
  • PS Power Save
  • the field contains the association identity (AID) of the transmitting station.
  • the four address fields can contain a combination of the following address types: base service set identification (BSSID), destination address (DA), source address (SA), receiver address (RA), and transmitter address (TA).
  • BSSID base service set identification
  • DA destination address
  • SA source address
  • RA receiver address
  • TA transmitter address
  • the SEQ-CTRL field includes a sequence number and a fragment number.
  • the sequence number indicates the sequence number of each packet. The sequence number is the same for each packet sent from a fragmented packet. Otherwise, the sequence number is incremented by one until it reaches 4095, when it begins at zero again.
  • the fragment number indicates the number of each frame sent that belongs to a fragmented frame.
  • the QOS-CTRL field indicates the QoS parameters of the packet.
  • the QOS-CTRL field includes a TID subfield, which indicates the traffic category.
  • the process of per TID aggregation release is now replaced by a multi-TID aggregation release process. Furthermore, a packet's sequence number in the 802.11n header is now replaced with a virtual sequence number, and the packet's original sequence number is moved inside the payload of the encapsulated 802.11n packet.
  • FIG. 4A presents a block diagram illustrating the operation of aggregating multiple packets with virtual sequence headers and transmitting the aggregate frame over a wireless link to a receiver, in accordance with one embodiment of the present invention.
  • a transmitting station 401 includes a network protocol stack 402 , which provides the packets to be encapsulated in 802.11n headers by an IEEE 802.11 encapsulation module 404 . Note that at this stage, the packets still retain their original sequence numbers and TIDs. Subsequently, the 802.11n encapsulated packets are buffered in a set of per TID aggregation queues 406 while transmitting station 401 waits for the transmission medium to become available.
  • a multi-TID aggregation release module retrieves a number of packets from per TID queues 406 .
  • the aggregate frame may contain packets associated with different TIDs, and these packets' sequence numbers can be non-continuous within each TID.
  • multi-TID aggregation release module 408 can always release the maximum number of packets allowed by the BAW. Note that in some embodiments packets belonging to higher-priority TIDs are released for assembly before those of lower-priority TIDs. Furthermore, both retransmitted packets and new packets can be released, without the constraint of having all the packets in the aggregate frame being continuous and from the same TID.
  • a virtual sequence header encapsulation module 409 updates the sequence number field and TID field in each packet's 802.11n header with a virtual sequence number and a virtual TID number, respectively. For all the packets in a given aggregate frame, their virtual sequence numbers are continuous (for example, from 1 to 64). All the packets in the aggregate frame also have the same virtual TID value. In addition, while updating the sequence number and TID field for each packet, virtual sequence header encapsulation module 409 also moves the packet's original sequence number and TID into the payload portion of the 802.11n ecapsulated packet. More details on the modified 802.11n header format are provided below in conjunction with FIG. 4B .
  • the aggregate frame which contains all the released and modified packet, is then provided to a transmitter 410 , which transmits the aggregate frame over a wireless link to a receiving station 421 .
  • a virtual sequence header decapsulation module 413 decapsulates the aggregate frame and restores the original sequence number and TID in the 802.11n header for each packet. Subsequently, the packets are reordered and buffered in a set of per TID de-aggregation reorder buffers 414 .
  • a per TID de-aggregation release module 416 then releases the packets from buffers 414 to a 802.11 decapsulation 418 , which removes a packet's 802.11n header and forwards the packet to a network protocol stack 420 .
  • receiving station 421 responds back to transmitting station 421 with a block acknowledgement containing a bitmap corresponding to the virtual sequence numbers.
  • FIG. 4B presents a modified IEEE 802.11n header that facilitates virtual sequence number of virtual traffic ID (TID), in accordance with one embodiment of the present invention.
  • an 802.11n header 504 's SEQ-CTRL field contains the virtual sequence number.
  • header 504 's QOS-CTRL field contains the virtual TID.
  • An additional virtual sequence control field 506 (VSEQ-CTRL), which in one embodiment can be four bytes long, is inserted after the QOS-CTRL field (the position where conventional packet payload begins).
  • VSEQ-CTRL field 506 contains the packet's original sequence number and TID.
  • the virtual sequence numbers do not have actual meanings and are only used to allow the receiving station to send a BLOCK ACK that acknowledges all the packets in the aggregate frame, the virtual sequence numbers can be restarted for every transmission. In other words, the transmission can be stateless. Note that the transmitting station might need to retain the virtual-to-original sequence number and TID mapping until the BLOCK ACK is received, so that in case of transmission error the transmitting station can identify the correct packets to retransmit.
  • the transmitting station can reserve packet slots in the aggregate frame for redundancy purposes, in order to mitigate non-ideal transmission conditions. For example, the transmitting station may randomly select 20% of the highest-priority packets and duplicate them in each aggregate frame to reduce the total packet error rate, if the packet error rate surpasses a predetermined threshold. Furthermore, the transmitting station can monitor the packet error rate for each TID, and dynamically replicate packets for each TID based on a predetermined QoS policy. When allocating reserved packet slots for duplicate packets, the transmitting station can use various methods (such as strict priority based or round robin) to ensure the desired QoS parameters are met.
  • various methods such as strict priority based or round robin
  • FIG. 5 presents a flowchart illustrating the process of reserving packet slots in an aggregate frame based on detected packet error rate associated with a traffic category, in accordance with one embodiment of the present invention.
  • a transmitting station first assembles and transmits a multi-TID aggregate frame (operation 502 ).
  • the transmitting station receives a BLOCK ACK from the receiving station (operation 504 ).
  • the transmitting station updates its record of per-TID packet error rate (operation 506 ).
  • the transmitting station determines, for each TID, whether the packet error rate is greater than a threshold for that TID (operation 508 ).
  • the transmitting station reserves a number of packet slots in the aggregate frame for duplicate packets of that TID (operation 510 ) prior to resuming transmission (operation 512 ). If the per-TID packet error rate is below the threshold, the transmitting station resumes transmission (operation 512 ). The process repeats itself by looping back to operation 502 .
  • FIG. 6 illustrates an exemplary transceiver system that facilitates virtual sequence number for wireless transmission in an IEEE 802.11 wireless link, in accordance with one embodiment of the present invention.
  • a wireless transceiver system 600 includes a processor 602 , a memory 604 , and a communication module 606 . Also included in transceiver system 600 are a virtual sequence number and TID encapsulation/decapsulation module 608 , a QoS management module 610 , and an aggregation management module 612 .
  • Communication module 606 may include a wireless radio that is responsible for transmitting and receiving physical signals.
  • Virtual sequence number and TID encapsulation/decapsulation module 608 is responsible for modifying the 802.11n headers to include virtual sequence numbers and virtual TIDs, and for restoring a packet's original sequence number and TID on the receiving side.
  • QoS management module 610 is responsible for enforcing any QoS policy.
  • Aggregation management module 612 is responsible for assembling aggregate frames and handling retransmission in case of packet error.
  • virtual sequence number and TID encapsulation/decapsulation module 608 may be implemented in software, which means they can be based on instructions stored in a storage device, loaded into memory 605 , and, when executed by processor 602 , perform the functions described above.
  • These modules can also be implemented partly or entirely in hardware, using application specific integrated circuits (ASICs) or filed programmable logic arrays (FPGAs).
  • ASICs application specific integrated circuits
  • FPGAs field programmable logic arrays
  • the methods and processes described in the detailed description section can be embodied as code and/or data, which can be stored in a computer-readable storage device as described above.
  • a computer system reads and executes the code and/or data stored on the computer-readable storage device, the computer system performs the methods and processes embodied as data structures and code and stored within the computer-readable storage medium.
  • modules or apparatus may include, but are not limited to, an ASIC chip, an FPGA, a dedicated or shared processor that executes a particular software module or a piece of code at a particular time, and/or other programmable-logic devices now known or later developed.
  • ASIC chip an integrated circuit chip
  • FPGA field-programmable gate array
  • programmable-logic devices now known or later developed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Theoretical Computer Science (AREA)
  • Quality & Reliability (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Hardware Design (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Radio Relay Systems (AREA)
US13/830,385 2012-11-21 2013-03-14 Method and system for improving wireless link efficiency Active 2033-11-27 US9270792B2 (en)

Priority Applications (17)

Application Number Priority Date Filing Date Title
US13/830,385 US9270792B2 (en) 2012-11-21 2013-03-14 Method and system for improving wireless link efficiency
ARP130104050A AR093370A1 (es) 2012-11-21 2013-11-05 Metodo y sistema para mejorar la eficiencia de enlaces inalambricos
US14/082,006 US9386129B2 (en) 2012-11-21 2013-11-15 Method and system for improving wireless link efficiency
PL19160387.7T PL3528409T3 (pl) 2012-11-21 2013-11-18 Sposób i system do poprawienia sprawności łącza bezprzewodowego
PL13798516T PL2923514T3 (pl) 2012-11-21 2013-11-18 Sposób i system do poprawienia sprawności łącza bezprzewodowego
EP19160387.7A EP3528409B1 (de) 2012-11-21 2013-11-18 Verfahren und system zur verbesserung der effizienz einer drahtlosen verbindung
LTEP13798516.4T LT2923514T (lt) 2012-11-21 2013-11-18 Belaidžio ryšio linijos efektyvumo gerinimo būdas ir sistema
EP13798516.4A EP2923514B1 (de) 2012-11-21 2013-11-18 Verfahren und system für verbesserte drahtlose verbindungseffizienz
BR112015011501-2A BR112015011501B1 (pt) 2012-11-21 2013-11-18 Método de transmissão de ligação sem fio e sistema de transmissão de ligação sem fio
CN201410377193.2A CN104244324B (zh) 2012-11-21 2013-11-18 无线链路传输方法和系统
ES13798516T ES2728172T3 (es) 2012-11-21 2013-11-18 Método y sistema para mejorar la eficiencia de enlaces inalámbricos
EP23183330.2A EP4351208A1 (de) 2012-11-21 2013-11-18 Verfahren und system zur verbesserung der effizienz einer drahtlosen verbindung
CN201310577230.XA CN103812606B (zh) 2012-11-21 2013-11-18 提高无线链路的效率的方法和系统
PCT/US2013/070626 WO2014081676A1 (en) 2012-11-21 2013-11-18 Method and system for improving wireless link efficiency
US15/098,223 US9985749B2 (en) 2012-11-21 2016-04-13 Method and system for improving wireless link efficiency
US15/968,238 US10826654B2 (en) 2012-11-21 2018-05-01 Method and system for improving wireless link efficiency
CY20191100557T CY1122353T1 (el) 2012-11-21 2019-05-24 Μεθοδος και συστημα για τη βελτιωση της αποδοτικοτητας μιας ασυρματης ζευξης

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201261729219P 2012-11-21 2012-11-21
US13/830,385 US9270792B2 (en) 2012-11-21 2013-03-14 Method and system for improving wireless link efficiency

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US14/082,006 Continuation US9386129B2 (en) 2012-11-21 2013-11-15 Method and system for improving wireless link efficiency

Publications (2)

Publication Number Publication Date
US20140140228A1 US20140140228A1 (en) 2014-05-22
US9270792B2 true US9270792B2 (en) 2016-02-23

Family

ID=50727850

Family Applications (4)

Application Number Title Priority Date Filing Date
US13/830,385 Active 2033-11-27 US9270792B2 (en) 2012-11-21 2013-03-14 Method and system for improving wireless link efficiency
US14/082,006 Active 2033-07-08 US9386129B2 (en) 2012-11-21 2013-11-15 Method and system for improving wireless link efficiency
US15/098,223 Active 2033-11-03 US9985749B2 (en) 2012-11-21 2016-04-13 Method and system for improving wireless link efficiency
US15/968,238 Active 2033-10-18 US10826654B2 (en) 2012-11-21 2018-05-01 Method and system for improving wireless link efficiency

Family Applications After (3)

Application Number Title Priority Date Filing Date
US14/082,006 Active 2033-07-08 US9386129B2 (en) 2012-11-21 2013-11-15 Method and system for improving wireless link efficiency
US15/098,223 Active 2033-11-03 US9985749B2 (en) 2012-11-21 2016-04-13 Method and system for improving wireless link efficiency
US15/968,238 Active 2033-10-18 US10826654B2 (en) 2012-11-21 2018-05-01 Method and system for improving wireless link efficiency

Country Status (10)

Country Link
US (4) US9270792B2 (de)
EP (3) EP3528409B1 (de)
CN (1) CN104244324B (de)
AR (1) AR093370A1 (de)
BR (1) BR112015011501B1 (de)
CY (1) CY1122353T1 (de)
ES (1) ES2728172T3 (de)
LT (1) LT2923514T (de)
PL (2) PL2923514T3 (de)
WO (1) WO2014081676A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170019290A1 (en) * 2014-03-31 2017-01-19 Siemens Aktiengesellschaft Detection of a faulty node in a network

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8836601B2 (en) 2013-02-04 2014-09-16 Ubiquiti Networks, Inc. Dual receiver/transmitter radio devices with choke
US9496620B2 (en) 2013-02-04 2016-11-15 Ubiquiti Networks, Inc. Radio system for long-range high-speed wireless communication
US9270792B2 (en) 2012-11-21 2016-02-23 Ubiquiti Networks, Inc. Method and system for improving wireless link efficiency
US9397820B2 (en) 2013-02-04 2016-07-19 Ubiquiti Networks, Inc. Agile duplexing wireless radio devices
US9543635B2 (en) 2013-02-04 2017-01-10 Ubiquiti Networks, Inc. Operation of radio devices for long-range high-speed wireless communication
US8855730B2 (en) 2013-02-08 2014-10-07 Ubiquiti Networks, Inc. Transmission and reception of high-speed wireless communication using a stacked array antenna
US9191037B2 (en) 2013-10-11 2015-11-17 Ubiquiti Networks, Inc. Wireless radio system optimization by persistent spectrum analysis
JP6302209B2 (ja) * 2013-10-28 2018-03-28 キヤノン株式会社 画像処理装置、その制御方法、及びプログラム
WO2015134755A2 (en) 2014-03-07 2015-09-11 Ubiquiti Networks, Inc. Devices and methods for networked living and work spaces
EP3114884B1 (de) 2014-03-07 2019-10-23 Ubiquiti Inc. Cloud-vorrichtung-identifizierung und -authentifizierung
WO2015142723A1 (en) 2014-03-17 2015-09-24 Ubiquiti Networks, Inc. Array antennas having a plurality of directional beams
CN104981941B (zh) 2014-04-01 2018-02-02 优倍快网络公司 天线组件
US9954771B1 (en) * 2015-01-30 2018-04-24 Marvell Israel (M.I.S.L) Ltd. Packet distribution with prefetch in a parallel processing network device
GB2539483B (en) 2015-06-18 2021-06-09 Southern Gas Networks Plc Sealing method, apparatus and system
CN107360594B (zh) * 2016-05-09 2020-07-07 中国移动通信有限公司研究院 一种信息处理方法及装置
CN107613526B (zh) * 2016-07-12 2021-04-23 珠海市魅族科技有限公司 无线局域网的通信方法、通信装置、接入点和站点
CN107613569B (zh) * 2016-07-12 2021-04-27 珠海市魅族科技有限公司 无线局域网的通信方法、通信装置、接入点和站点
US10666506B2 (en) * 2017-05-12 2020-05-26 Futurewei Technologies, Inc. In-situ OAM trace type extension with cascade bitmap and segment in-situ OAM
CN109714135B (zh) * 2018-12-24 2021-10-15 北京威努特技术有限公司 一种数据包传输方法及装置
CN109787722B (zh) * 2019-01-25 2021-07-30 北京数码视讯技术有限公司 数据传输方法、装置和服务器
CN115552956A (zh) * 2019-11-04 2022-12-30 北京小米移动软件有限公司 数据传输方法、装置和通信设备
WO2021141449A1 (ko) * 2020-01-08 2021-07-15 엘지전자 주식회사 멀티 링크 전송을 위한 시그널링
KR20230036821A (ko) * 2021-09-08 2023-03-15 삼성전자주식회사 링크의 프레임 에러율을 업데이트하는 전자 장치 및 전자 장치의 동작 방법

Citations (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4726019A (en) * 1986-02-28 1988-02-16 American Telephone And Telegraph Company, At&T Bell Laboratories Digital encoder and decoder synchronization in the presence of late arriving packets
US4894823A (en) * 1986-02-28 1990-01-16 American Telephone And Telegraph Company Time stamping for packet system nodes
US6216167B1 (en) * 1997-10-31 2001-04-10 Nortel Networks Limited Efficient path based forwarding and multicast forwarding
US20020041756A1 (en) * 2000-10-11 2002-04-11 Takahiro Kato Data reproduction apparatus that switches reproduction target
US20020080819A1 (en) * 2000-10-30 2002-06-27 Shiao-Li Tsao Packet tunneling method in mobile data communication network
US20030123466A1 (en) * 2000-05-21 2003-07-03 Oren Somekh Modem relay over packet based network
US6662213B1 (en) * 2000-01-10 2003-12-09 Sun Microsystems, Inc. System and method for ensuring delivery of a single communication between nodes
US20040047308A1 (en) * 2002-08-16 2004-03-11 Alan Kavanagh Secure signature in GPRS tunnelling protocol (GTP)
US20040103314A1 (en) * 2002-11-27 2004-05-27 Liston Thomas F. System and method for network intrusion prevention
US20040117498A1 (en) * 2002-12-02 2004-06-17 Nec Infrontia Corporation Packet transmission system and packet reception system
US6839868B1 (en) * 1998-10-12 2005-01-04 Centre National D'etudes Spatiales Method for processing an electronic system subjected to transient error constraints and memory access monitoring device
US20050265302A1 (en) * 2004-05-28 2005-12-01 Yasuyuki Nishibayashi Wireless communication apparatus and wireless communication method
US6976055B1 (en) * 2001-01-18 2005-12-13 Cisco Technology, Inc. Apparatus and method for conducting a transfer of a conference call
US20060034174A1 (en) * 2004-08-11 2006-02-16 Yasuyuki Nishibayashi Communication apparatus and communication method
US20060136614A1 (en) * 2004-07-30 2006-06-22 Nokia Corporation System and method for variable length aggregate acknowledgements in a shared resource network
US20070110055A1 (en) * 2005-11-11 2007-05-17 Broadcom Corporation Fast block acknowledgment generation in a wireless environment
US20080056125A1 (en) * 2006-09-06 2008-03-06 Nokia Corporation Congestion control in a wireless network
US7395346B2 (en) * 2003-04-22 2008-07-01 Scientific-Atlanta, Inc. Information frame modifier
US20080192644A1 (en) * 2007-02-08 2008-08-14 Yoriko Utsunomiya Radio communication apparatus and radio communication method
US20080212612A1 (en) * 2007-03-01 2008-09-04 Samsung Electronics Co., Ltd. Method and system for acknowledgements in wireless communications
US20080240107A1 (en) * 2007-03-26 2008-10-02 Qualcomm Incorporated Sequence numbering for distributed wireless networks
US20090046580A1 (en) * 2007-07-23 2009-02-19 Polycom, Inc System and method for lost packet recovery with congestion avoidance
WO2009146342A1 (en) 2008-05-30 2009-12-03 Motorola, Inc. Method for aggregating frames in a wireless communication network
US20110188429A1 (en) * 2008-09-11 2011-08-04 Yong Ho Seok Power management in tunneled direct link setup
US20110199953A1 (en) * 2008-10-15 2011-08-18 Yong Ho Seok Method for multicast frame transmission and duplicated multicast frame detection
US20120014335A1 (en) * 2009-01-16 2012-01-19 Kabushiki Kaisha Toshiba Wireless terminal
US8144579B2 (en) * 2007-06-29 2012-03-27 Intel Corporation Wireless performance improvement via client-free forward error correction
US20120281699A1 (en) * 2011-05-06 2012-11-08 Qualcomm Incorporated Apparatus and methods for wireless communication using a packet structure
US20120320752A1 (en) * 2010-02-19 2012-12-20 Thomson Licensing Control of packet transfer through a multipath session comprising a single congestion window
US20130039313A1 (en) * 2004-02-13 2013-02-14 Broadcom Corporation Transmission of wide bandwidth signals in a network having legacy devices
US20130107869A1 (en) * 2009-04-09 2013-05-02 Qualcomm Incorporated Wireless communication utilizing mixed protocols
US20130229916A1 (en) * 2010-11-16 2013-09-05 Hitachi, Ltd. Communication device and communication system
US20140140232A1 (en) * 2012-11-21 2014-05-22 Ubiquiti Networks, Inc. Method and system for improving wireless link efficiency
US20140269722A1 (en) * 2013-03-18 2014-09-18 Fujitsu Limited Communication method, communication device, and communication system

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7489688B2 (en) * 2003-12-23 2009-02-10 Agere Systems Inc. Frame aggregation
JP4086304B2 (ja) * 2004-04-23 2008-05-14 株式会社東芝 通信装置、通信システム、および通信制御プログラム
US7447233B2 (en) * 2004-09-29 2008-11-04 Intel Corporation Packet aggregation protocol for advanced switching
US20080192774A1 (en) * 2007-02-13 2008-08-14 Samsung Electronics Co., Ltd. Method and system for aggregating multiple small packets in wireless communication
US8363597B2 (en) * 2009-04-09 2013-01-29 Qualcomm Incorporated MAC architectures for wireless communications using multiple physical layers
US9350495B2 (en) * 2009-12-08 2016-05-24 Qualcomm Incorporated Method and apparatus for multicast block acknowledgment
US9628226B2 (en) * 2010-09-30 2017-04-18 Qualcomm Incorporated Block acknowledgement with retransmission policy differentiation

Patent Citations (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4894823A (en) * 1986-02-28 1990-01-16 American Telephone And Telegraph Company Time stamping for packet system nodes
US4726019A (en) * 1986-02-28 1988-02-16 American Telephone And Telegraph Company, At&T Bell Laboratories Digital encoder and decoder synchronization in the presence of late arriving packets
US6216167B1 (en) * 1997-10-31 2001-04-10 Nortel Networks Limited Efficient path based forwarding and multicast forwarding
US6839868B1 (en) * 1998-10-12 2005-01-04 Centre National D'etudes Spatiales Method for processing an electronic system subjected to transient error constraints and memory access monitoring device
US6662213B1 (en) * 2000-01-10 2003-12-09 Sun Microsystems, Inc. System and method for ensuring delivery of a single communication between nodes
US20030123466A1 (en) * 2000-05-21 2003-07-03 Oren Somekh Modem relay over packet based network
US20020041756A1 (en) * 2000-10-11 2002-04-11 Takahiro Kato Data reproduction apparatus that switches reproduction target
US20020080819A1 (en) * 2000-10-30 2002-06-27 Shiao-Li Tsao Packet tunneling method in mobile data communication network
US6976055B1 (en) * 2001-01-18 2005-12-13 Cisco Technology, Inc. Apparatus and method for conducting a transfer of a conference call
US20040047308A1 (en) * 2002-08-16 2004-03-11 Alan Kavanagh Secure signature in GPRS tunnelling protocol (GTP)
US20040103314A1 (en) * 2002-11-27 2004-05-27 Liston Thomas F. System and method for network intrusion prevention
US20040117498A1 (en) * 2002-12-02 2004-06-17 Nec Infrontia Corporation Packet transmission system and packet reception system
US7395346B2 (en) * 2003-04-22 2008-07-01 Scientific-Atlanta, Inc. Information frame modifier
US20130039313A1 (en) * 2004-02-13 2013-02-14 Broadcom Corporation Transmission of wide bandwidth signals in a network having legacy devices
US20050265302A1 (en) * 2004-05-28 2005-12-01 Yasuyuki Nishibayashi Wireless communication apparatus and wireless communication method
US20060136614A1 (en) * 2004-07-30 2006-06-22 Nokia Corporation System and method for variable length aggregate acknowledgements in a shared resource network
US20060034174A1 (en) * 2004-08-11 2006-02-16 Yasuyuki Nishibayashi Communication apparatus and communication method
US20070110055A1 (en) * 2005-11-11 2007-05-17 Broadcom Corporation Fast block acknowledgment generation in a wireless environment
US20080056125A1 (en) * 2006-09-06 2008-03-06 Nokia Corporation Congestion control in a wireless network
US20080192644A1 (en) * 2007-02-08 2008-08-14 Yoriko Utsunomiya Radio communication apparatus and radio communication method
US20080212612A1 (en) * 2007-03-01 2008-09-04 Samsung Electronics Co., Ltd. Method and system for acknowledgements in wireless communications
US20080240107A1 (en) * 2007-03-26 2008-10-02 Qualcomm Incorporated Sequence numbering for distributed wireless networks
US8144579B2 (en) * 2007-06-29 2012-03-27 Intel Corporation Wireless performance improvement via client-free forward error correction
US20090046580A1 (en) * 2007-07-23 2009-02-19 Polycom, Inc System and method for lost packet recovery with congestion avoidance
WO2009146342A1 (en) 2008-05-30 2009-12-03 Motorola, Inc. Method for aggregating frames in a wireless communication network
US20110188429A1 (en) * 2008-09-11 2011-08-04 Yong Ho Seok Power management in tunneled direct link setup
US20110199953A1 (en) * 2008-10-15 2011-08-18 Yong Ho Seok Method for multicast frame transmission and duplicated multicast frame detection
US20120014335A1 (en) * 2009-01-16 2012-01-19 Kabushiki Kaisha Toshiba Wireless terminal
US20130107869A1 (en) * 2009-04-09 2013-05-02 Qualcomm Incorporated Wireless communication utilizing mixed protocols
US20120320752A1 (en) * 2010-02-19 2012-12-20 Thomson Licensing Control of packet transfer through a multipath session comprising a single congestion window
US20130229916A1 (en) * 2010-11-16 2013-09-05 Hitachi, Ltd. Communication device and communication system
US20120281699A1 (en) * 2011-05-06 2012-11-08 Qualcomm Incorporated Apparatus and methods for wireless communication using a packet structure
US20140140232A1 (en) * 2012-11-21 2014-05-22 Ubiquiti Networks, Inc. Method and system for improving wireless link efficiency
US20140269722A1 (en) * 2013-03-18 2014-09-18 Fujitsu Limited Communication method, communication device, and communication system

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
Ashtaiwi, Abduladhim et al., "Utilizing IEEE 802.11n to Enhance QoS Support in Wireless Mesh Networks", 33rd IEEE Conference on Local Computer Networks, Oct. 2008, pp. 689-696.
Hajlaoui, Nasreddine et al., "A Frame Aggregation Scheduler for QoS-Sensitive Applications in IEEE 802.11n WLANs", 2012 International Conference on Communications and Information Technology, Jun. 2012, pp. 221-226.
Nakajima, Tetsu et al., "A Simple and Efficient Selective Repeat Scheme for High Throughput WLAN, IEEE802.11n", IEEEVTS Vehicular Technology Conference Proceedings, Apr. 2007, pp. 1302-1306.
Zhang, Lei et al., "Prediction-Based Link-layer Dynamic Fragmentation and Aggregation for Wireless Mesh Networks", 2008 International Colloquium on Computing, Communication, Control, and Management, Aug. 2008, pp. 582-586.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170019290A1 (en) * 2014-03-31 2017-01-19 Siemens Aktiengesellschaft Detection of a faulty node in a network
US10103933B2 (en) * 2014-03-31 2018-10-16 Siemens Aktiengesellschaft Detection of a faulty node in a network

Also Published As

Publication number Publication date
AR093370A1 (es) 2015-06-03
US20140140232A1 (en) 2014-05-22
US10826654B2 (en) 2020-11-03
US9386129B2 (en) 2016-07-05
LT2923514T (lt) 2019-06-10
CN104244324A (zh) 2014-12-24
US20160226626A1 (en) 2016-08-04
PL2923514T3 (pl) 2019-08-30
US20140140228A1 (en) 2014-05-22
EP3528409C0 (de) 2023-08-02
EP2923514A1 (de) 2015-09-30
PL3528409T3 (pl) 2024-01-29
BR112015011501B1 (pt) 2022-11-16
BR112015011501A2 (pt) 2017-07-11
US20180248657A1 (en) 2018-08-30
WO2014081676A1 (en) 2014-05-30
EP4351208A1 (de) 2024-04-10
US9985749B2 (en) 2018-05-29
EP2923514B1 (de) 2019-03-06
EP3528409B1 (de) 2023-08-02
ES2728172T3 (es) 2019-10-22
CY1122353T1 (el) 2021-01-27
CN104244324B (zh) 2018-10-16
EP3528409A1 (de) 2019-08-21

Similar Documents

Publication Publication Date Title
US10826654B2 (en) Method and system for improving wireless link efficiency
US7944819B2 (en) System and method for transmission and acknowledgment of blocks of data frames in distributed wireless networks
US9749091B2 (en) Method and device for data communication in a communication network
JP4440037B2 (ja) 通信装置及び通信方法
US8321734B2 (en) Method and apparatus to transmit and/or receive data via wireless network and wireless device
JP4374001B2 (ja) 通信装置、通信方法、および通信システム
KR20070087725A (ko) 무선 네트워크를 통하여 데이터를 효율적으로 송/수신하는방법 및 그 방법을 이용한 무선 디바이스
EP3790213B1 (de) Mac-basierte hybride automatische wiederholungsanforderung (harq)
CN110858794B (zh) 多频段传输方法及装置
US11882479B2 (en) Wireless LAN communication device and wireless LAN communication method
CN103812606B (zh) 提高无线链路的效率的方法和系统
US9628397B2 (en) Communication device and related packet processing method
US20240064835A1 (en) Transmitting station and receiving station
CN113950812B (zh) 超低有限延迟的多无线媒体接入控制
WO2024032352A1 (zh) 数据处理方法及装置
US20240098819A1 (en) Transmitting station and receiving station
US20240056884A1 (en) Transmitting station and receiving station
GB2523151A (en) Method and device for data communication in a communication network

Legal Events

Date Code Title Description
AS Assignment

Owner name: UBIQUITI NETWORKS, INC., CALIFORNIA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:DAYANANDAN, SRIRAM;IVANAUSKAS, DARIUS;KRIAUCIUNAS, MINDAUGAS;AND OTHERS;SIGNING DATES FROM 20130417 TO 20130430;REEL/FRAME:030397/0921

STCF Information on status: patent grant

Free format text: PATENTED CASE

MAFP Maintenance fee payment

Free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Year of fee payment: 4

AS Assignment

Owner name: UBIQUITI INC., NEW YORK

Free format text: CHANGE OF NAME;ASSIGNOR:UBIQUITI NETWORKS, INC.;REEL/FRAME:050151/0451

Effective date: 20190816

MAFP Maintenance fee payment

Free format text: PAYMENT OF MAINTENANCE FEE, 8TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1552); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Year of fee payment: 8