WO2004109981A1 - 基地局および無線端末 - Google Patents
基地局および無線端末 Download PDFInfo
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- WO2004109981A1 WO2004109981A1 PCT/JP2004/008054 JP2004008054W WO2004109981A1 WO 2004109981 A1 WO2004109981 A1 WO 2004109981A1 JP 2004008054 W JP2004008054 W JP 2004008054W WO 2004109981 A1 WO2004109981 A1 WO 2004109981A1
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- information
- combined
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Classifications
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- 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
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- 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
- H04L1/1685—Details of the supervisory signal the supervisory signal being transmitted in response to a specific request, e.g. to a polling signal
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- 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
- H04W28/04—Error control
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- 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]
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- 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
- the present invention relates to a base station and a wireless terminal that transmit and receive wireless signals conforming to the wireless LAN standard IEEE802.il, and in particular, to CS MAZC A (Carrier Sense Multiple Access / Collision Avoidance) as a wireless access method. This is related to the base station and wireless terminal used. Background technology ''
- wireless LAN communication system wireless LAN communication system
- IEEE802. Lib which is standardized by the US wireless LAN standard IEEE802.il (see Non-Patent Document 1), Products compliant with the IEEE802.11a standard are on the market.
- the communication speed has been increased by widening the frequency band, using multi-level modulation, using multiple antennas, and the like.
- a wireless LAN conforming to the IEEE802.lib standard uses the 2.4 GHz band, and uses CCK (Complementary Code Keying) as the modulation method to achieve a physical maximum transmission rate of 1 1. M bps.
- the wireless LAN conforming to the IEEE802.11a standard uses the 5 GHz band, and uses OFDM (Orthogonal Frequency Division Multiplex) as the modulation method to achieve the maximum physical transmission rate. Is 54 Mb ps.
- the wireless LAN conforming to the IEEE802.llg standard whose specifications are currently being studied, uses the 2.4 GHz band and uses OFDM as the modulation method, and the physical maximum transmission rate is 54 Mb. ps.
- Non-Patent Document 1 IEEE802.11 http: // standards, ieee.org/getieee802/802.11. html
- a base station and a plurality of wireless terminals transmit and receive a wireless signal conforming to the IEEE802.11 standard, and When connecting to the outside of the system via an access line such as the 1-net (R), the maximum data length passed from the access line side to the base station is limited to 150 Obyte.
- the base station since the base station connects to and connects to the access line (Ethernet ()), when each wireless terminal is also connected to the base station, the maximum data length must be set to 1500 bytes and transmitted.
- An object of the present invention is to obtain a base station and a radio terminal capable of reducing the processing time of the radio frame response (ACK, NAK) and the overhead such as a header in a physical layer. DISCLOSURE OF THE INVENTION.
- a wireless LAN system is a base station that can be connected to an external access line, performs wireless signal transmission / reception processing in the system, and uses a usable wireless band and modulation scheme.
- Connection information for determining the maximum number of connections or the maximum frame length in accordance with, and connection enable / disable information for indicating that connection is possible.
- Frame combining means (interfacing unit 14) for combining a plurality of frames received from an external access line based on the combining information, the combining availability information, and predetermined packet information.
- the frame division means (corresponding to the interface Interview knit 1 frame division unit in the 4 3 2, 3 2 a), characterized in that it comprises a.
- a base station constituting a wireless network for a home Z office can appropriately transmit a plurality of externally received frames based on the connection information, the connection enable / disable information and the predetermined bucket information. Combine and transmit, and split the combined frame appropriately on the receiving side. Also, for example, using the CSMA CA, the media cannot be accessed for a certain period of time or more, and there is time until the next access ⁇ , and the combining process of received frames is continued until the next access timing .
- FIG. 1 is a diagram showing a configuration of a radio communication system including a base station and a radio terminal according to the present invention
- FIG. 2 is a diagram showing a configuration of an interface unit of the base station and the radio terminal according to the present invention
- FIG. 3 is a diagram showing a data frame format
- FIG. 4 is an example of a transmitting-side shared memory in the shared memory of the first embodiment.
- FIG. 5 is a flow chart showing the processing of the frame combining cut
- FIG. 6 is a drawing showing the receiving side in the Shared-Memoi'y of the first embodiment.
- FIG. 7 is a diagram showing an example of a memory.
- FIG. 7 shows processing of a frame division unit.
- FIG. 8 is a diagram showing a configuration of a frame combination ut of the second embodiment
- FIG. 9 is a view of a frame division tus of the second embodiment.
- FIG. 1 is a diagram showing a configuration of a wireless communication system (a wireless network for a home z office) including a base station and a wireless terminal according to the present invention.
- This wireless communication system is a base station with a gate to interconnect with an access line (for example, Ethernet (), xDSL, CATV, FTTH, etc.) that connects to a wired or wireless external communication network.
- (AP) 1 and a plurality of wireless terminals (STAs) 2 A, 2 B,... which perform reception processing for information from the access line and transmission processing to the access line.
- transmission / reception processing of wireless signals conforming to IEEE802.lib, IEEE802.11a standard, etc. standardized in the U.S. wireless LAN standard IEEE802.11 is performed. .
- the base station 1 terminates a wired or wireless access line, and transmits information received from the access line to a specific wireless terminal 2, 2, 2,, via a wireless network in the home Z office.
- a communication unit system 11 for transmitting information received from the wireless terminals 2 ⁇ , 2 ⁇ , '... To the access line side.
- the communication unit system 11 includes an access system terminating unit 13 for terminating the access line, a signal on the access line and a wireless terminal 2, 2,.
- Interface unit 14 (corresponding to, for example, a notifier and a bridge) for controlling the mutual conversion of the signal format between the signals of... And for controlling a memory and the like (corresponding to a shared memory 33 described later).
- the wireless network 15 includes an antenna 12 for performing transmission / reception processing of wireless signals compliant with the IEEE802.11a, IEEE802.lib, IEEE802.llg standards, and the like.
- the wireless terminals 2A and 2B are connected to information equipment 21A and 21B, such as a personal computer, PDA, and television receiver, respectively, and the information equipment 21A and 21B to the base.
- Terminal cutout systems 22 A and 22 B for controlling data transmission and reception with the communication cutout system 11 of the station 1.
- the terminal unit systems 22A and 22B exchange the signal format between the signals of the base station 1 and other wireless terminals and the signals of the information equipment body 21A and 21B.
- Interface, 24A and 24B for controlling and further controlling the memory etc. (corresponding to Shared Memory 33 described later), and IEEE802.11a, IEEE802.lib.
- It is equipped with wireless units 25A and 25B that perform transmission and reception processing of wireless signals compliant with the IEEE802.llg standard and the like, and antennas 23A and 23B.
- FIG. 2 is a diagram showing a configuration example of interface cutouts 14, 24A and 24B of the base station and the wireless terminal according to the present invention.
- the frame combining unit 31 combines a plurality of frames from the access termination unit 13 of the base station 1 ′ or the information equipment main units 21 A and 21 B of the wireless terminals 2 A and 2 B as necessary. It is stored in Shared-Memory 33 in a certain format.
- the coupling information for determining the maximum number of couplings or the maximum frame length according to the available radio band and modulation scheme” and “ “Enable signal to indicate that combining is possible” is notified.
- the frame division unit 32 receives frames from the wireless unit 15 of the base station 1 or the wireless units 25A and 25B of the wireless terminals 2A and 2B as necessary. Into multiple frames and store them in Shared-Memory 33 in a certain format.
- FIG. 3 shows a data frame format transmitted by the wireless unit 15 or the wireless units 25A and 25B when a plurality of frames are combined.
- This data frame indicates that the packet is DAT A.-A T-packet type field, a MAC header including a destination MAC (Media Access Control) address, a source MAC address, etc., and a Frame-body indicating transmission data. And a calculation result (FCS: Frame Check Sequence) for checking the bit error of each bucket.
- FCS Frame Check Sequence
- FIG. 4 is a diagram showing an example of the transmitting side shared-memory 33a in the shared-memory 33 of the present embodiment.
- the shared memory 33a on the transmitting side is divided into a fixed size Ml, and each area Ml 0 (first frame after combining: next transmission frame), Ml (second frame), Ml 2 (third frame) , Ml 3 (4th frame) includes frame ID, destination MAC address, source MAC address, number of connections, maximum number of connections, current frame length, maximum frame length, etc.
- Frame management information K10, and a data field K11 capable of storing a plurality of frames.
- Each data field includes, for example, information on the access termination unit 13 of the base station 1 or information on the radio terminals 2 ⁇ , 2 ⁇ Frames D 0 a, D 10 b, D 11 a, D from the main body 21 ⁇ , 21 ⁇ li, D12a, D12b, D12c, Dl3a.
- FIG. 5 is a flowchart showing the processing of the frame combining unit 31.
- the next transmission bucket in the wireless unit 15 (or 25 mm, 25 mm) is stored in the area M10 of the shared memory 33a on the transmitting side in FIG.
- the frame combining unit of base station 1 will be described.
- the processing of 31 will be described, the same applies to the frame combining unit 31 of the wireless terminals 2A and 2B.
- the frame combining unit 31 for example, upon receiving a frame from the access system end if unit 13 (FIG. 5, step S1), examines the frame to determine whether to combine the received frames. Inspection information is checked (step S2). As a result of the inspection, for example, when the frame combination is not performed (Step S2, No), the received frame is stored as a new frame in the shared memory 33a on the transmission side together with the frame management information (Step S12). Specifically, as shown in FIG. 4, the frame D13a is stored together with the frame management information in the area M13 of the transmission-side shared memory 33a.
- inspection information for example, a MAC address, an IP address, a TCP port number, a TOS field (a field describing the priority of a bucket) and the like are used. In some cases, it is also possible to set different conditions for each MAC address, IP address, TCP port number, etc.
- Step S2 when frame combining is performed (Step S2, Yes), the frame combining unit 31 inspects the shared memory 33a on the transmitting side (Step S3), and It is determined whether there is a frame satisfying the condition in the shared memory 33a (step S5). As a result of the determination, if there is no frame satisfying the condition in the shared memory 33a on the transmission side (step S5, No), the received frame is set as a new frame together with the frame management information in the same way as described above. Save to 33a (step S12).
- step S5 if there is already a frame that satisfies the condition in the shared memory 33a on the transmitting side (step S5, Yes), the frame combining unit 31 determines that -It is checked whether or not the frame existing in the memory 33a is a frame constituting the above-mentioned first frame (area M10) (step S6).
- the first frame is not configured (Step S6, No)
- the current number of connections exceeds the maximum number of connections determined based on the connection information. It is checked whether or not it can be combined (Step S10, Yes), and the received frame is combined after the existing frame (Step S11). Specifically, as shown in FIG.
- the frame D lib is stored after D 11 a in the area Ml 1
- the frame D 12 c is stored after D 12 b in the area M 12.
- the received frame is stored as a new frame in the shared memory 33a on the transmission side together with the frame management information as described above. Yes (step S12).
- the maximum number of couplings is determined in the frame coupling unit 31 according to the coupling information periodically updated from the wireless unit 15. For example, when the usable radio frequency band is wide, the MIMO (Multiple Input Multiple Output), etc., or when the modulation efficiency is good using multi-level modulation, etc. However, if the transmission condition is poor and the modulation scheme is being transmitted with reduced efficiency, reduce the size.
- MIMO Multiple Input Multiple Output
- step S6 if the 'frame existing in the transmission side shared memory 33a is a frame constituting the above-mentioned first frame (area M10) (step S6, Yes),
- the radio unit i5 of the base station 1 using CSMA as the radio access method has a large pack-off value, a band is reserved for a certain period of time, or reception is in progress. In some cases, media cannot be accessed for a certain period of time. Therefore, the frame combining unit 31 checks whether further frame combining is possible, that is, whether there is time to add a frame, based on the Enable signal (step S7).
- step S8 if the combination is possible (the number of combinations ⁇ the maximum number of combinations) (step S8, Yes), the received frame is combined after the existing frame (step S9). Specifically, as shown in FIG. 4, the frame D10b is stored after the area D10a in the area M10.
- the frame combining unit 31 stores the received frame as a new frame in the shared memory 33a on the transmission side together with the frame management information (step S12).
- the transmission frame written in the transmission-side shared memory 33a is read out at the transmission timing determined by the wireless station 15 of the base station 1 and standardized by the wireless LAN standard IEEE802.11.
- the signal is converted into a radio signal conforming to the specified IEEg802.lla, IEEE802.llb, IEEE802.llg standards and the like, and transmitted from the antenna 12.
- the transmission frame does not have to have the maximum frame number or the maximum frame length at the time of transmission.
- the maximum number of connections is used in the determination process for combining frames, but it is also possible to realize the maximum frame length or a parameter calculated in relation to the wireless band and modulation efficiency. It is possible.
- the inspection information is not limited to the MAC address or the like, but may be a TOS field, an IP address, a TCP port number, or the like. It is also possible to set different maximum number of connections and maximum frame length conditions for each MAC address, TOS field, IP address, TCP port number, and so on. It is also possible to change the conditions such as the maximum number of connections and the maximum frame length according to the application and service contents. In addition, the order in the shared memory 33a can be changed according to the application / service content.
- FIG. 6 is a diagram showing an example of the receiving side Red-Memory 33b in the Shared-Memory 33 of the present embodiment.
- the receiving side Shared-Memoiy 33b is divided into a certain size M2, and each area M20, M21, M22, M23 has a frame including a frame ID, destination MAC address, source MAC address, etc.
- Each of the data fields includes, for example, frames D 20a and D 21a obtained by dividing frames received from the wireless unit 15 of the local station 1 or the wireless units 25A and 25B of the wireless terminals 2A and 2B. , D22a and D23a.
- FIG. 7 is a flowchart showing the processing of the frame division unit 32.
- a description will be given of a frame division process for a received frame combined like the frame format shown in FIG.
- the processing of the frame division unit 32 of the base station 1 will be described, but the operation is similarly performed for the frame division unit 32 of the radio terminals 2A and 2B.
- the frame division unit 32 checks the frame format by checking the frame information F -Extract the Type field and the picture field (see Fig. 3) (Step S22, Step S23). As a result, if the combined frame has the F-Type field and the marauding field (Step S24, Yes), the received frame is determined to be a frame to be divided. On the other hand, if the frame does not have the F-Type field and the NUM field (Step S24, No), the frame division unit 32 stores the received frame together with the management information in the shared memory 33 on the receiving side. Write to b (step S29).
- the management information and the frame D20a are written in the area M20.
- the frame management information for 33b and the reception 'frame writing process are repeatedly executed over the number of frame combinations: UM (steps S26, S27, S28).
- UM steps S26, S27, S28.
- the divided first frame D21a is written in the area M21 together with the frame management information
- the divided second frame D22a is written together with the frame management information in the area M21.
- the received frame written in the receiving side Sharec-Memory 33 b is read out from the access terminating unit 13 of the base station 1, and the processing corresponding to the external access line is performed.
- packet information such as the MAC address, IP address, and TOS field of the base station 1 and the wireless terminals 2 A and 2 B constituting the wireless network for the home office is
- a plurality of externally received frames are appropriately combined and transmitted, and the combined frame on the receiving side is appropriately divided.
- the reception frame will be sent until the next access timing.
- the idle time between frames for carrier sense in CSMA / CA and the transmission processing time of the radio frame response (ACK, ⁇ ) can be greatly reduced, further improving the system throughput. Can be realized. '
- the present embodiment shows a wireless communication system in which wireless terminals are connected to a base station
- the present invention is not limited to this, and, for example, wireless terminals may establish their own networks and communicate.
- the present invention can also be applied to an ad hoc network.
- the configuration inside the interface unit in the present embodiment may be another configuration as long as the frame combining process and the dividing process can be realized.
- the frame format in the case of combining a plurality of received frames is not limited to FIG. 3 , and other configurations may be used as long as the frame combining process and the dividing process can be realized.
- the processing according to the present embodiment is not limited to CSMA / CA, but is also applicable to wireless access schemes such as TDMA (Time Division Multiple Access) and Polling.
- the configuration of the wireless communication system (wireless network for home Z office) in the present embodiment is the same as that of FIG. The description is omitted.
- the same components as those of the interface units 14, 24 A, and 24 B shown in FIG. 2 are denoted by the same reference numerals, and description thereof is omitted.
- the frame format used in the present embodiment is the same as that in FIG. 3 of Embodiment 1 described above. Hereinafter, only processing different from the first embodiment will be described.
- FIG. 8 is a diagram showing the configuration of the frame connection butt 31a.
- the frame connection butt 31a is used for the access system termination hut 13 or the base station 1 of the base station 1.
- Information on wireless terminals 2 A and 2 B Frame analysis unit 41 that analyzes received frames sent from main body 21 A and 21 B, and connection condition specification cutout that specifies frame connection conditions 42, a memory unit 43 for storing partial information of the received frame, etc., and a process for writing the received frame to the shared-memory 33, and a frame writing unit for combining the received frames.
- G 4 4 is provided.
- the processing of the frame combining unit 31a of the base station 1 will be described-but the frame combining unit 3a of the wireless terminals 2A and 2B will also be described. Works the same. '
- the frame solution ilfut 41 and the termination unit 13 are sent.
- connection condition specification cut 42 the connection conditions for the MAC address, IP address, TOS field, RTP field, etc. of the received frame are checked, and the processing of the received frame is determined.
- V o The explanation is made using IP (Voice over IP) data as a joining condition.
- the frame write unit 44 examines the memory unit 43 to find out how the previously received frame is stored in the current shared-memory 33. Check the frame length, etc., and determine the processing of the received frame. For example, if there is no frame that can be combined in the Shared-Memory 33, the frame writing unit 44 newly stores the received frame in the Shared-Memory 33 by the same processing as in the first embodiment. Save the information, and then write the information after the writing process to the memory cut 43. When the frame in the shared memory 33 is read by the wireless unit 15, the content of the memory unit 43 is also updated.
- the memory unit 43 is examined, and if it is possible to write to the shared memory 33 according to the conditions of the Enable signal and the binding information, the frame writing unit 44 stores the received frame in the same manner as in the first embodiment. During processing, write to a specific location in Shared-Memory 33 and combine it. '
- the destination MAC address of the data frame format transmitted from the wireless unit 15 is used as the broadcast address.
- the DATA field inside the Frame-Body shall include the MAC address of the received frame.
- FIG. 9 is a diagram showing a configuration of the frame division unit 32a.
- the frame division unit 32a is used for the wireless unit 15 of the base station 1 or the wireless unit 2 of the wireless terminals 2A and 2B. 5 A, 25 A frame analysis unit 51 for inspecting received frames sent from 25 B, and a frame writing unit 52 for writing to the Shared Memory 33 based on the analysis result. , are provided.
- Unit 51 receives the radio unit 15 The frame-body of the communication frame is inspected.
- the frame writing unit 52 writes the frame to the shared memory 33.
- the frame analysis unit 51 sets the frame address to -Only the data addressed to the own terminal's MA address in the body is extracted, and the frame writing unit 52 writes the extracted data to the shared memory 33.
- the wireless unit transmits the broadcast address
- the receiving side extracts only the information addressed to the terminal itself from the data received as the broadcast address. I decided to write it to Shared-Memory. This allows frames for multiple terminals to be
- the present invention is not limited to this, and information such as a TOS field, an IP address, and a TCP port number may be used. .
- EDCA Enhanced We show a configuration to comply with QoS (Quality of Service) using Distributed Channel Access
- QoS Quality of Service
- the shared-memory 33 provided for each application is provided, and the frame combining unit 31 stores the frames for each predetermined application in the same processing as in the above-described embodiment. It is assumed that they are combined.
- a frame combined by the frame combining unit 31 is stored in a queue for each priority by the wireless unit 15 and transmitted according to the priority (EDCA).
- the wireless unit 15 uses the EDCA method as an example.
- HCCA Hybrid Coordination Function
- PCF Point Coordination Function
- DCF Distributed Coordination Function
- the wireless terminal 2A returns ACK if there is no error in the combined frame received by the wireless unit 25A. Then, the received combined frame is divided by the same processing as in Embodiment 1 or Embodiment 2 described above, and transmitted to information ⁇ body 21 #. In the present embodiment, one ACK may be returned for the combined frame, or an ACK may be returned for each combined application.
- the shared memory 33 divided for each application is provided, and frame combining is performed for each priority. As a result, frames can be transmitted in descending order of priority.
- the process of transmitting QoS data from base station 1 to wireless terminal 2A has been described, but there is no limitation on the devices that perform transmission processing and reception processing.
- the transmission processing of the combined frame for each priority has been described.
- the present invention is not limited to this, and the frames of a plurality of applications are combined into one frame based on the priority and the transmission amount, and the broadcast is performed. You can also send it by docast.
- the connection may be performed only within the allowable time.
- communication between a base station and a wireless terminal has been described.
- a wireless terminal may include a frame for another wireless terminal belonging to the base station in addition to the base station. It can also be transmitted as a broadcast.
- QoS information, application information, and constraint information on packet delay are further stored as frame management information stored in shared memory 33 together with the received frame.
- the configuration of the wireless communication system (Mizumi network for home / office) in the present embodiment is the same as that of FIG. The description is omitted.
- the same components as those of the interface units 14, 24A, 24B shown in FIG. 2 are denoted by the same reference numerals, and description thereof is omitted.
- the frame format used in the present embodiment is the same as that in FIG. 3 of the first embodiment described above.
- the frame connection unit and the frame division unit are the same as those in FIGS. 8 and 9 of the second embodiment described above.
- FIGS. 8 and 9 of the second embodiment described above.
- the connection condition specifying unit 42 checks the connection condition from the transmission destination of the received frame and determines the processing of the received frame.
- a streaming data frame to be broadcast (multicast) is combined with a polling-controlled unitycast data frame.
- the frame write unit 44 examines the memory unit 43 to see how the previously received frame is stored in the current shared memory 33, and the maximum number of connections and the maximum Check the frame length, etc., and determine the processing of the received frame.
- the frame write cut 44 uses the same processing as in Embodiment 1 to newly add the received frame to Shared-Memory 33. And write the information after the writing process to the memory unit 43. Note that the frame in the Shared-Memory 33 is read out by the wireless unit 15: The content of the memory unit 43 is also updated for ⁇ .
- the memory cut 43 is examined, and if there is a frame that can be linked to the shared memory 33 according to the conditions of the Enable signal and the link information, the frame write unit 44 will delete the received frame.
- the data is written to a specific location in the shared memory 33 and combined.
- ⁇ ⁇ A single unicast data frame and a plurality of streaming data frames to be broadcast (multicast) are combined. I do.
- only a plurality of streaming data frames to be broadcast (multicast) are combined.
- the IP address and the MAC address of the destination wireless terminal are described in the field in which the information of the combined data frame of the broadcast is described.
- the frame analysis unit 51 of the wireless terminal inspects the frame body of the received frame sent from the wireless unit 15, and if the frame consists of a single data, the frame writing unit 52 Write the frame to Shared-Memory 33.
- the broadcast address is Is written and the frame-body contains a streaming data frame containing the group address of the terminal itself, the frame writing unit 52 writes the frame into the shared memory 33.
- the frame analysis unit 51 indicates that the destination MAC address is not addressed to the own terminal in the frame body.
- Frame write unit 52 writes the data into the shared memory 33. Further, the terminal receiving the data frame under the polling control returns an ACK frame to the transmission source device.
- the data frame under polling control is combined with the broadcast (multicast) streaming data.
- the broadcast (multicast) streaming data it is possible to communicate with individual terminals while distributing information to a plurality of terminals.
- the case where polling control is used has been described as an example.
- the present invention can be similarly applied to a case where DCF, EDCA, HCCA, or the like is used as a control method.
- the control for each priority described in the third embodiment may be simultaneously performed.
- the communication target may be between base stations or between wireless terminals. Further, in the present embodiment, communication between a base station and a wireless terminal has been described, but a wireless terminal may transmit a frame including a frame to another wireless terminal belonging to the base station in addition to the base station. It is also possible. Industrial applicability
- the base station and the wireless terminal according to the present invention are useful as communication devices for transmitting and receiving wireless signals in accordance with the wireless LAN standard IEEE802.11. Suitable for communication systems employing A.
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KR1020087023315A KR100930770B1 (ko) | 2003-06-04 | 2004-06-03 | 송신기 및 통신 방법 |
US10/557,004 US20070165670A1 (en) | 2003-06-04 | 2004-06-03 | Base station and wireless terminal |
JP2005506828A JP4628953B2 (ja) | 2003-06-04 | 2004-06-03 | 通信方法および送信機 |
US13/159,100 US20110243117A1 (en) | 2003-06-04 | 2011-06-13 | Base station and wireless terminal |
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JP2003-159776 | 2003-06-04 | ||
JP2003159776 | 2003-06-04 |
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US13/159,100 Division US20110243117A1 (en) | 2003-06-04 | 2011-06-13 | Base station and wireless terminal |
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JP (1) | JP4628953B2 (ja) |
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Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2005168002A (ja) * | 2003-11-12 | 2005-06-23 | Agere Systems Inc | メディア・ストリームにQoS差別化を使用したメディア送達 |
JP2006310994A (ja) * | 2005-04-27 | 2006-11-09 | Hitachi Communication Technologies Ltd | 無線lan接続装置およびパケット長制御方法 |
JP2009278542A (ja) * | 2008-05-16 | 2009-11-26 | Sony Corp | 無線通信装置、無線通信システム、無線通信方法及びプログラム |
JP2011155655A (ja) * | 2005-10-05 | 2011-08-11 | Qualcomm Inc | アドホック無線通信網におけるピアツーピア通信 |
JP2012528535A (ja) * | 2009-05-26 | 2012-11-12 | クアルコム,インコーポレイテッド | 可変フレームサイズを有するリンク上でより高いデータ転送速度をサポートする装置および方法 |
US8989666B2 (en) | 2011-02-25 | 2015-03-24 | Nintendo Co., Ltd. | Information processing system, information processing apparatus, computer-readable storage medium having stored therein information processing program, and information processing method |
US9262364B2 (en) | 2011-02-25 | 2016-02-16 | Nintendo Co., Ltd. | Communication control apparatus, computer-readable storage medium having stored therein communication control program, communication control method, and information processing system |
JP2017046325A (ja) * | 2015-08-28 | 2017-03-02 | 株式会社東芝 | 通信装置、通信方法およびプログラム |
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US7801174B2 (en) * | 2004-12-29 | 2010-09-21 | Alcatel-Lucent Usa Inc. | Techniques for efficient control of aggregating wireless voice communications |
JP4683359B2 (ja) * | 2007-11-24 | 2011-05-18 | 健 星子 | パケット通信システム |
JP5573053B2 (ja) * | 2009-09-04 | 2014-08-20 | ソニー株式会社 | 無線通信装置および無線通信方法 |
JP5408445B2 (ja) * | 2010-03-15 | 2014-02-05 | オムロン株式会社 | プログラマブルコントローラおよびマスタ通信回路 |
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US7899059B2 (en) | 2003-11-12 | 2011-03-01 | Agere Systems Inc. | Media delivery using quality of service differentiation within a media stream |
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JP2006310994A (ja) * | 2005-04-27 | 2006-11-09 | Hitachi Communication Technologies Ltd | 無線lan接続装置およびパケット長制御方法 |
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US8942133B2 (en) | 2005-10-05 | 2015-01-27 | Qualcomm Incorporated | Peer-to-peer communication in ad hoc wireless network |
US8942130B2 (en) | 2005-10-05 | 2015-01-27 | Qualcomm Incorporated | Peer-to-peer communication in ad hoc wireless network |
JP2009278542A (ja) * | 2008-05-16 | 2009-11-26 | Sony Corp | 無線通信装置、無線通信システム、無線通信方法及びプログラム |
JP2012528535A (ja) * | 2009-05-26 | 2012-11-12 | クアルコム,インコーポレイテッド | 可変フレームサイズを有するリンク上でより高いデータ転送速度をサポートする装置および方法 |
US8989666B2 (en) | 2011-02-25 | 2015-03-24 | Nintendo Co., Ltd. | Information processing system, information processing apparatus, computer-readable storage medium having stored therein information processing program, and information processing method |
US9262364B2 (en) | 2011-02-25 | 2016-02-16 | Nintendo Co., Ltd. | Communication control apparatus, computer-readable storage medium having stored therein communication control program, communication control method, and information processing system |
US9832771B2 (en) | 2011-02-25 | 2017-11-28 | Nintendo Co., Ltd. | Communication control apparatus, computer-readable storage medium having stored therein communication control program, communication control method, and information processing system |
US10981068B2 (en) | 2011-02-25 | 2021-04-20 | Nintendo Co., Ltd. | Information processing system, information processing apparatus, computer-readable storage medium having stored therein information processing program, and information processing method |
US11612820B2 (en) | 2011-02-25 | 2023-03-28 | Nintendo Co., Ltd. | Information processing system, information processing apparatus, computer-readable storage medium having stored therein information processing program, and information processing method |
JP2017046325A (ja) * | 2015-08-28 | 2017-03-02 | 株式会社東芝 | 通信装置、通信方法およびプログラム |
Also Published As
Publication number | Publication date |
---|---|
US20070165670A1 (en) | 2007-07-19 |
KR100930770B1 (ko) | 2009-12-09 |
JPWO2004109981A1 (ja) | 2006-07-20 |
KR20080097483A (ko) | 2008-11-05 |
US20110243117A1 (en) | 2011-10-06 |
CN100448210C (zh) | 2008-12-31 |
CN1799225A (zh) | 2006-07-05 |
KR20060024787A (ko) | 2006-03-17 |
KR100884120B1 (ko) | 2009-02-17 |
JP4628953B2 (ja) | 2011-02-09 |
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