CN1810005A

CN1810005A - Packet communication method and packet communication device

Info

Publication number: CN1810005A
Application number: CN 200480017277
Authority: CN
Inventors: 永田健悟; 熊谷智明; 大槻信也; 齐藤一贤; 相河聪; 吉冈正文
Original assignee: Nippon Telegraph and Telephone Corp
Current assignee: Nippon Telegraph and Telephone Corp
Priority date: 2003-08-20
Filing date: 2004-08-20
Publication date: 2006-07-26

Abstract

A first communication node, which transmits a packet including a data field and an FCS field, selectively transmits, to a second communication node, a first packet containing, in the FCS field, a first error detection code generated by performing a prescribed error detection code operation on a transmission packet or a second packet containing, in the FCS field, a second error detection code obtained by performing a prescribed operation on the first error detection code. The second communication node compares an error detection code C generated by performing the prescribed error detection code operation on a received packet with an error detection code F1 contained in the FCS field of the received packet, performs reception processing on the received packet with the understanding that it is classified as the first packet if the error detection codes C and F1 coincide with each other, compares the error detection code C generated by performing the prescribed error detection code operation on the received packet with an error detection code F2 obtained by performing an inverse operation for returning a result of the prescribed operation to an original on the error detection code F1 contained in the FCS field of the received packet, and performs reception processing on the received packet with the understanding that it is classified as the second packet if the error detection codes C and F2 coincide with each other.

Description

Block communication method and group communication system

Technical field

Employed block communication method and group communication system when the present invention relates between communication node the multiple grouping of transmission.

Background technology

In the radio packet communication system of the multiple grouping of transmission, need discern and carry out correspondingly processing the kind of the grouping that receives.As one of method of the identifying information of notifying described grouping, there is operation to be used to detect FCS (the Frame Check Sequence of grouping; Frame Check Sequence) CRC of the mistake of being stored in the zone (Cyclic Redundancy Check; Cyclic redundancy check (CRC)) Ma method (speciallyying permit communique No. 3349861).

That is, when to two kinds of groupings (for example packet with control grouping) when distinguishing, a kind of grouping is that the common CRC sign indicating number that will be generated by predetermined CRC calculation process stores the FCS zone into, and another kind is to substitute the CRC sign indicating number and store predetermined codes into the FCS zone.In receiving station, carry out the FCS verification, CRC sign indicating number that will generate by the CRC calculation process that the grouping that receives is scheduled to and the CRC sign indicating number of storing in the FCS zone compare, handle as a kind of grouping if the two is consistent, the two if inconsistent (FCS check errors), then the grouping that will receive abandons as erroneous packet, even perhaps inconsistent but as long as stored in the FCS zone for predetermined codes, grouping is handled as another kind.

In addition, in above-mentioned document, in order to discern the wireless station that particular packet (notice packet or synchronized packets) is handled and to abandon the wireless station of particular packet and used this method.That is, in wireless station A, if be FCS check errors then abandon described grouping (particular packet), and in wireless station B,, can be considered as mistake yet but handle as particular packet even as long as be the FCS check errors but have predetermined codes.

Here, the multiple grouping that need discern with wireless station also has be used for a plurality of control groupings of changing, the packet of reference format and the packet of special format etc. between the pattern of multiple access control except above-mentioned packet and control grouping.Below, the radio packet communication system of packet of transmission special format is described.

In the radio packet communication method in the past of secundum legem standard, only pre-determine a wireless channel that will use in advance, before the transmission of packet, whether described wireless channel is in idle condition and detects (carrier wave detection), only send a data grouping during for idle condition when described wireless channel.By this control, the time ground of can between a plurality of wireless stations, staggering share a wireless channel ((1) IEEE 802.11 " MAC and PHY Specification for Metropolitan AreaNetworks ", IEEE 802.11,1998; (2) little Electricity power デ one communication システ system/Wide band territory is moved Move ア Network セスシステ system (CSMA) Standard Quasi Regulations lattice, ARIB SDT-T71 1.0 editions, the meeting of (society) Electricity ripple industry, is equalled into 12 years plans calmly).

In this radio packet communication method, in order to improve the efficiency of transmission of packet, studying use known space division multiplexing technology (?rugged ほか, MIMO チヤネ Le To I り 1000Mbit/s を Actual Now The Ru Wide band territory move Move communication with the motion of SDM-COFDM mode, the Electricity feelings Reported Ji Intraoperative of Communications Society research Reported accuse, AP2001-96, RCS 2001-135 (2001-10)), walk abreast with a wireless channel and send the radio packet communication method of a plurality of packets.This space division multiplexing technology (SDM) sends different packets from a plurality of antennas simultaneously at same wireless channel, and the different corresponding Digital Signal Processing of the propagation coefficient by carrying out each received in a plurality of antennas with wireless relatively station packet, thereby receive a plurality of grouped datas that send simultaneously with same wireless channel.In addition, determine the space division multiplexing number according to propagation coefficient and other factors.

In addition, in order to improve the efficiency of transmission of packet, studying following radio packet communication method, wherein, each wireless station has a plurality of wireless communication interfaces respectively, be in idle condition if detect a plurality of wireless channels of discovery, then utilize described a plurality of wireless channel to walk abreast and send a plurality of packets by carrier wave.

In addition, that is studying also has following radio packet communication method, wherein, by the combination of a plurality of wireless channels and space division multiplexing technology, the parallel packet that sends with the summation a great deal of of each space division multiplexing number of a plurality of wireless channels.

In these methods,,, then utilize two wireless channels walk abreast to send three data two in dividing into groups if the wireless channel of two idle conditions is arranged for example for the grouping of three data.In addition, for two data groupings,, then utilize two wireless channels to walk abreast and send all (two) packets if the wireless channel of three idle conditions is arranged.Also be the same under the situation of having used the space division multiplexing technology.

Here, as generating, have following three kinds of methods from the method for the parallel a plurality of packets that send of Frame.For example when Frame be one and idle channel number when being two, by shown in Figure 56 (1), like that Frame being cut apart, generate two data groupings of same packets duration (being defined as the required time of transmission of data packets).In addition, when Frame is three and idle channel number when being two, shown in Figure 56 (2),, generate two data groupings of same packets duration for example by Frame 2 being cut apart and being combined with Frame 1 and Frame 3 respectively.Perhaps, it also is the same three Frames being linked up bisection afterwards.In addition, shown in Figure 56 (3), link Frame 1 and Frame 3, and on Frame 3, add dummy argument, generate two data groupings of same packets duration.In addition, under the situation that the transmission speed of each wireless channel is different when using a plurality of wireless channel, thereby adjust so that the size of each packet is than more identical than the corresponding grouping duration that makes with transmission speed.

In addition, in wireless local area network (WLAN) system, a data frame transform is become a MAC (MediaAccess Control; Media interviews control) frame.Therefore, even in the size of data of the data area of Frame hour, also be transformed into a mac frame, send as data groupings (packet radio).For example, the largest amount of the data area of the mac frame of IEEE 802.11 standards is 2296 bytes, and in Ethernet (registered trade mark) frame that uses as Frame usually, the size of data of data area is restricted to maximum 1500 bytes.Therefore, even the Ether frame of largest amount for the largest amount (2296) of the data area of mac frame, also is that surplus is arranged very much.That is, in system in the past, the maximum data size that mac frame can send is not effectively utilized, thereby makes the improvement of disposal ability be restricted.

Therefore, in order to maximally utilise the size of data of packet, shown in Figure 56 (4), the data area of a plurality of Frames is combined in the middle of the method for transmitting as a data grouping also studying.In addition, in the method shown in Figure 56 (2), (3), also in the largest amount scope of mac frame, carry out the combination of Frame etc.

Here, by the frame shown in Figure 56 (1) cut apart a plurality of packets of generating can by following frame format correspondence, wherein said frame format is according to based on the standard criterion of existing segment processing.On the other hand, " shear paste " or the Figure 56 (3) by the Frame shown in Figure 56 (2), " combination " of the Frame shown in (4) and the packet of reconstruct are the special formats of secundum legem standard not.

In the packet of this special format, the data area of the data area of Frame and packet is not one to one obviously.On the other hand, in recipient's the wireless station, though must reset into original Frame from the packet that receives, owing to be the Frame that did not in the past reckon with, thereby can't restore at this point.It the reasons are as follows described.

In the system of reality, for example when lower floor sends, handle to be divided into Frame and send when the IP in the IP layer is divided into groups.At this moment, on the beginning part of the data area of each Frame that is split to form, the additional respectively header that is used to restore the initial IP grouping.When receiving the packet that forms from the Frame of generation like this recipient, extract Frame from packet, and then restore original IP grouping.

Usually, in recipient's IP layer, the beginning part that automatically identifies the data area of each Frame that receives is for after the essential header information of recovery initial IP grouping, carries out the recovery of IP grouping and handles.That is,,, then can have problems if the beginning part of the data area of each Frame is not the header information that is used to restore the initial IP grouping from the position of IP layer.

Yet, packet by carrying out " shear paste " or " combination " and reconstruct at transmit leg may move on to the header information that is used to restore the initial IP grouping part beyond the beginning zone of each Frame as mentioned above, thereby divides into groups if do not take some measure just can't restore IP in the IP layer.Therefore, when restoring the recipient to the IP grouping, at first need to restore by the initial data frame before the reconstruct from the packet that receives.

For in the Frame of recipient before the former reconstruct of packet reflex, the boundary line of packet, the sequential scheduling information of packet when needing packet whether to be special format, special format at the special format of transmit leg reconstruct.But, because the zone that in reference format, does not have definition to be used to transmit described information, thereby need described information be reached the recipient from transmit leg by the special format of redetermination.Here, when in communication system integral body, adopting common undefined special format since have to constitute communication system all wireless stations be replaced as and the corresponding device of special format, thereby can't avoid the ground cost to increase.

Here, for example situation about existing is mixed with the new wireless station of the packet of handling special format in the existing wireless station of the packet of hypothesis processing reference format, and wherein according to described reference format, a data grouping generates from a Frame; And, in a data grouping, shear the data area of having pasted a plurality of Frames according to described special format.

At this moment, at first carrying out between the wireless station of wireless packet communications, both sides need exchange and confirm grouping and respond packet, with regard to whether only corresponding with reference format, whether with reference format and special format is corresponding discerns.Then, need to comprise in the packet of special format: whether (1) packet reconstruct by " shear and paste " or " combination " Frame; (2) boundary line of Frame; (3) the sequential scheduling information of packet.

But, owing to confirm the control grouping and the identification of general data packets of grouping and respond packet and so on, the causes such as identification of the packet of the packet of reference format and special format in addition, there are the following problems in the method shown in the described document.That is, the method shown in the described document is: storage common CRC sign indicating number or predetermined codes in the FCS zone, carry out the FSC verification the recipient, and even if having the FCS check errors but have predetermined codes, then be not considered as mistake and handle as the control grouping.Thus, though can control identification between grouping and the general data packets, the FCS verification is only worked to general data packets, and inoperative to control grouping.That is,, the control grouping has been sacrificed the function of FCS verification in order to discern general data packets and control grouping.

Summary of the invention

The objective of the invention is to obtain a kind ofly error-checking code that stored, that be used for error checking in the FCS zone of grouping to be carried out method of operating, and realize to carry out reliably the block communication method and the group communication system of the FCS verification of each grouping for discerning multiple grouping.

In the block communication method of first scheme, transmission comprises first communication node of the grouping in data area and FCS zone and selects first grouping or second grouping to send to the second communication node, wherein, described first grouping will be by storing in the FCS zone sending first error-detecting code that error-detecting code calculation process that grouping is scheduled to generate, and described second grouping will have been implemented predetermined calculation process and second error-detecting code that obtains stores in the FCS zone to first error-detecting code.The second communication node compares error-detecting code C and error-detecting code F1, wherein said error-detecting code C generates by the error-detecting code calculation process that butt joint contracture group is scheduled to, described error-detecting code F1 is stored in the FCS zone that receives grouping, receives processing as first grouping when the two is consistent; And error-detecting code C and error-detecting code F2 compared, wherein said error-detecting code C generates by the error-detecting code calculation process that butt joint contracture group is scheduled to, described error-detecting code F2 has implemented to make the result of predetermined calculation process to turn back to original inverse operation to handle and obtain, receive processing as second grouping when the two is consistent to being stored in error-detecting code F1 in the FCS zone that receives grouping.

So, carry out the inverse operation processing by the error-detecting code of butt joint contracture group, thereby can receive the FCS verification of grouping reliably, and receive the kind of dividing into groups, carry out corresponding reception processing according to the error-detecting code identification of storing in the FCS zone.

In the block communication method of alternative plan, transmission comprises first communication node of the grouping in data area and FCS zone and selects first grouping or second grouping to send to the second communication node, wherein, described first grouping will be by storing in the FCS zone sending first error-detecting code that error-detecting code calculation process that grouping is scheduled to generate, and described second grouping will have been implemented predetermined calculation process and second error-detecting code that obtains stores in the FCS zone to first error-detecting code.The second communication node is with error-detecting code C, error-detecting code F1 and error-detecting code F2 compare, wherein said error-detecting code C generates by the error-detecting code calculation process that butt joint contracture group is scheduled to, described error-detecting code F1 is stored in the FCS zone that receives grouping, described error-detecting code F2 has implemented to make the result of predetermined calculation process to turn back to original inverse operation to handle and obtain to being stored in error-detecting code F1 in the FCS zone that receives grouping, when error-detecting code C is consistent with error-detecting code F1, receive processing, when error-detecting code C is consistent with error-detecting code F2, receive processing as second grouping as first grouping.

So, carrying out inverse operation by the error-detecting code of butt joint contracture group handles, thereby can receive the FCS verification of grouping reliably, and relatively discern the kind that receives grouping by single, carry out corresponding reception and handle according to the error-detecting code of storing in the FCS zone.

In the block communication method of third party's case, transmission comprises first communication node of the grouping in data area and FCS zone and selects first grouping or second grouping to send to the second communication node, wherein, described first grouping will be by storing in the FCS zone sending first error-detecting code that error-detecting code calculation process that grouping is scheduled to generate, and described second grouping will have been implemented predetermined calculation process and second error-detecting code that obtains stores in the FCS zone to first error-detecting code.The second communication node compares error-detecting code C1 and error-detecting code F, wherein said error-detecting code C1 generates by the error-detecting code calculation process that butt joint contracture group is scheduled to, described error-detecting code F is stored in the FCS zone that receives grouping, receives processing as first grouping when the two is consistent; And error-detecting code C2 and error-detecting code F compared, wherein said error-detecting code C2 has implemented predetermined calculation process to the error-detecting code that the error-detecting code calculation process of being scheduled to by butt joint contracture group generates to obtain, described error-detecting code F is stored in the FCS zone that receives grouping, receives processing as second grouping when the two is consistent.

So, the error-detecting code calculation process of being scheduled to by butt joint contracture group, thus can receive the FCS verification of grouping reliably, and receive the kind of grouping according to the error-detecting code identification of storing in the FCS zone, carry out corresponding reception and handle.

In the block communication method of cubic case, transmission comprises first communication node of the grouping in data area and FCS zone and selects first grouping or second grouping to send to the second communication node, wherein, described first grouping will be by storing in the FCS zone sending first error-detecting code that error-detecting code calculation process that grouping is scheduled to generate, and described second grouping will have been implemented predetermined calculation process and second error-detecting code that obtains stores in the FCS zone to first error-detecting code.The second communication node is with error-detecting code C1, error-detecting code C2 and error-detecting code F compare, wherein said error-detecting code C1 generates by the error-detecting code calculation process that butt joint contracture group is scheduled to, described error-detecting code C2 obtains by error-detecting code C1 having been implemented predetermined calculation process, described error-detecting code F is stored in the FCS zone that receives grouping, when error-detecting code C1 is consistent with error-detecting code F, receive processing, when error-detecting code C2 is consistent with error-detecting code F, receive processing as second grouping as first grouping.

So, the error-detecting code calculation process of being scheduled to by butt joint contracture group, thus the FCS verification of grouping can be received reliably, and according to the error-detecting code of storing in the FCS zone, relatively discern the kind that receives grouping by single, carry out corresponding reception and handle.

In the block communication method of the 5th scheme, transmission comprises first communication node of the grouping in data area and FCS zone and selects first grouping or second grouping to send to the second communication node, wherein, described first grouping will be by carrying out the error-detecting code that the first error-detecting code calculation process generates and store in the FCS zone sending grouping, and described second grouping will be by carrying out the error-detecting code that the second error-detecting code calculation process generates and store in the FCS zone sending grouping.The second communication node compares error-detecting code C1 and error-detecting code F, wherein said error-detecting code C1 carries out the first error-detecting code calculation process by butt joint contracture group and generates, described error-detecting code F is stored in the FCS zone that receives grouping, receives processing as first grouping when the two is consistent; And error-detecting code C2 and error-detecting code F compared, wherein said error-detecting code C2 carries out the second error-detecting code calculation process by butt joint contracture group and generates, described error-detecting code F is stored in the FCS zone that receives grouping, receives processing as second grouping when the two is consistent.

So, carry out a plurality of error-detecting code calculation process by butt joint contracture group, thereby can receive the FCS verification of grouping reliably, and receive the kind of dividing into groups, carry out corresponding reception and handle according to the error-detecting code identification of storing in the FCS zone.

In the block communication method of the 6th scheme, transmission comprises first communication node of the grouping in data area and FCS zone and selects first grouping or second grouping to send to the second communication node, wherein, described first grouping will be by carrying out the error-detecting code that the first error-detecting code calculation process generates and store in the FCS zone sending grouping, and described second grouping will be by carrying out the error-detecting code that the second error-detecting code calculation process generates and store in the FCS zone sending grouping.The second communication node is with error-detecting code C1, error-detecting code C2 and error-detecting code F compare, wherein said error-detecting code C1 carries out the first error-detecting code calculation process by butt joint contracture group and generates, described error-detecting code C2 generates carrying out the second error-detecting code calculation process by butt joint contracture group, described error-detecting code F is stored in the FCS zone that receives grouping, when error-detecting code C1 is consistent with error-detecting code F, receive processing, when error-detecting code C2 is consistent with error-detecting code F, receive processing as second grouping as first grouping.

So, carry out a plurality of error-detecting code calculation process by butt joint contracture group, thereby can receive the FCS verification of grouping reliably, and according to the error-detecting code of storing in the FCS zone, relatively discern the kind that receives grouping by single, carry out corresponding reception and handle.

In the block communication method of the 7th scheme, handle as each described predetermined operation that first error-detecting code is carried out in the cubic case of first scheme to the, at least carry out in the following processing, described processing has: the bit reversal of the part position of the bit reversal of all of first error-detecting code or first error-detecting code or adding predetermined value on first error-detecting code or deduct predetermined value on first error-detecting code.

In the block communication method of all directions case, to implement predetermined calculation process and second error-detecting code that obtains stores the grouping of second in the FCS zone into to first error-detecting code as the 7th scheme is described, by making up predetermined calculation process and the grouping two or more, and between first communication node and second communication node, receive and dispatch and comprise first the grouping more than three kinds in being grouped in the generation that adds and subtract of multiple predetermined value.

In the block communication method of the 9th scheme, as the 5th scheme or the described first error-detecting code calculation process of the 6th scheme and the second error-detecting code calculation process, the parameter that is used for mutual different error-detecting code is carried out computing is inequality, the grouping of transmitting-receiving more than three kinds between first communication node and second communication node stored the described parameter of using more than three kinds and the error-detecting code that generates respectively in the wherein said FCS of the being grouped in zone.

In the block communication method of the tenth scheme, kind with each described predetermined calculation process that first error-detecting code is carried out in first to fourth scheme, combined generating the grouping more than three kinds with the kind of the described error-detecting code calculation process of the 5th or the 6th scheme, and between first communication node and second communication node, receive and dispatch.

In the block communication method of the 11 scheme, each described first grouping differs from one another with second grouping or its frame format of the grouping more than three kinds in first to the tenth scheme.First communication node is in the FCS zone of the grouping that sends, stored the error-detecting code that generates by the corresponding calculation process of frame format with the grouping that sends, the second communication node is discerned its frame format by the error-detecting code of the grouping that receives is carried out calculation process, and handles based on the reception that the frame format that identifies is divided into groups.

In the block communication method of the 12 scheme, the 11 scheme is described to be the specified standard frame format and to stipulate special frames form in addition with the corresponding frame format of error-detecting code.

In the block communication method of the 13 scheme, the described special frames form of the 12 scheme be grouped in fragment or a plurality of Frame that comprises the partition data frame in the data portion and obtain, and comprise storage and be used for restoring corresponding Frame and the zone of required information from described packet at the second communication node.

In the block communication method of the tenth cubic case, as the described packet of the 13 scheme, paste or in conjunction with generating a plurality of packets by Frame is cut apart, sheared, and in each packet, comprise respectively and be stored as the restored data frame and the zone of required information.

In the block communication method of the 15 scheme, the described a plurality of packets of the tenth cubic case utilize a plurality of wireless channels to be transmitted in parallel, or in a wireless channel, utilize space division multiplexing to be transmitted in parallel, or utilize a plurality of wireless channels and space division multiplexing to be transmitted in parallel.

In the block communication method of the 16 scheme, the described a plurality of packets of the 15 scheme are following generations, that is: recently adjust the grouping size ratio of each packet according to the transmission speed of each wireless channel, be equal to each other so that be defined as transmitting the grouping duration of required time.

In the block communication method of the 17 scheme, the grouping of the described special frames form of the 12 scheme comprises the zone of the control information of storing communication node.

In the block communication method of the tenth all directions case, for the grouping of the described special frames form of the 12 scheme, when not having data portion in the grouping at standard frame format, it is provided with the zone of the control information of the described communication node of storage.

In the block communication method of the 19 scheme, for the grouping of the described special frames form of the 12 scheme, when not having data portion in the grouping at standard frame format, it is provided with the zone of the transmission data of the described communication node of storage.

In the block communication method of the 20 scheme, the grouping of the described special frames form of the 12 scheme has the frame header beyond the regulation.

In the block communication method of the 21 scheme, the 17 or the tenth described control information of case from all directions is the traffic information of communication node.

In the block communication method of the 22 scheme, the 17 or the tenth described control information of case from all directions is to be used to communicate the information that the transfer of node is handled.

In the block communication method of the 23 scheme, the 17 or the tenth described control information of case from all directions is to be used for communication node is connected on the network and required parameter.

In the block communication method of the 20 cubic case, the 17 or the tenth described control information of case from all directions is the information that is used to change the channel access procedure of communication node.

In the block communication method of the 25 scheme, the 17 or the tenth described control information of case from all directions is the information of the channel allocation time of relevant communication node.

In the block communication method of the 26 scheme, the 17 or the tenth described control information of case from all directions is the information of relevant communication node the propagation path information, transmission rate or the transmission power control that detect.

In the block communication method of the 27 scheme, each described first grouping has by carrying out the error-detecting code that mutually different calculation process generates by its transmission destination with second grouping or the grouping more than three kinds in first to the tenth scheme.First communication node is the storage errors error detecting code in the FCS zone of the grouping that sends, and wherein said error-detecting code is to generate by the corresponding calculation process in transmission destination with the grouping that sends.The second communication node is sent to the reception of the grouping of himself and handles, and the wherein said grouping that is sent to himself is to identify by the error-detecting code of the grouping that receives is carried out calculation process.

In the block communication method of the 20 all directions case, each described first grouping has by carrying out mutually different calculation process and the generation error error detecting code by the kind of grouping with second grouping or the grouping more than three kinds in first to the tenth scheme.First communication node is the storage errors error detecting code in the FCS zone of the grouping that sends, and wherein said error-detecting code is to generate by the corresponding calculation process of kind with the grouping that sends.The second communication node carries out a kind of reception of grouping to be handled, and wherein said this kind grouping is to identify by the error-detecting code of the grouping that receives is carried out calculation process.

In the block communication method of the 29 scheme, the described grouping kind of the 20 all directions case is to discern by the identifier that is included in the expression grouping kind in the described grouping, and is used with the corresponding error-detecting code of the kind of each grouping.

In the block communication method of the 30 scheme, for the described second communication node of the 28,29 schemes, when identifying when having received predetermined grouping by the error-detecting code of the grouping that receives being carried out calculation process, it replys processing to described grouping, and with first communication node as managing with the corresponding communication node of special processing.

In the block communication method of the 31 scheme, for the described second communication node of the 28,29 schemes, when identifying when having received predetermined grouping by the error-detecting code of the grouping that receives being carried out calculation process, it will represent to exist the information with the corresponding communication node of special processing to be notified to the upper strata.

In the block communication method of the 32 scheme, the described grouping kind of the 20 all directions case is corresponding with the information of the key of representing encrypted packet, and is used with the corresponding error-detecting code of each key.

In the group communication system of the 33 scheme, first communication node that transmission comprises the grouping in data area and FCS zone comprises as lower device: it selects first grouping or second grouping to send to the second communication node, wherein, described first grouping will be by storing in the FCS zone sending first error-detecting code that error-detecting code calculation process that grouping is scheduled to generate, and described second grouping will have been implemented predetermined calculation process and second error-detecting code that obtains stores in the FCS zone to described first error-detecting code.The second communication node comprises as lower device; It compares error-detecting code C and error-detecting code F1, wherein said error-detecting code C generates by the error-detecting code calculation process that butt joint contracture group is scheduled to, described error-detecting code F1 is stored in the FCS zone that receives grouping, receives processing as described first grouping when the two is consistent; And error-detecting code C and error-detecting code F2 compared, wherein said error-detecting code C generates by the error-detecting code calculation process that butt joint contracture group is scheduled to, described error-detecting code F2 has implemented to make the result of predetermined calculation process to turn back to original inverse operation to handle and obtain, receive processing as described second grouping when the two is consistent to being stored in error-detecting code F1 in the FCS zone that receives grouping.

In the group communication system of the 30 cubic case, first communication node that transmission comprises the grouping in data area and FCS zone comprises as lower device: it selects first grouping or second grouping to send to the second communication node, wherein, described first grouping will be by storing in the FCS zone sending first error-detecting code that error-detecting code calculation process that grouping is scheduled to generate, and described second grouping will have been implemented predetermined calculation process and second error-detecting code that obtains stores in the FCS zone to described first error-detecting code.The second communication node comprises as lower device: it is with error-detecting code C, error-detecting code F1 and error-detecting code F2 compare, wherein said error-detecting code C generates by the error-detecting code calculation process that butt joint contracture group is scheduled to, described error-detecting code F1 is stored in the FCS zone that receives grouping, described error-detecting code F2 has implemented to make the result of predetermined calculation process to turn back to original inverse operation to handle and obtain to being stored in error-detecting code F1 in the FCS zone that receives grouping, when described error-detecting code C is consistent with described error-detecting code F1, receive processing, when described error-detecting code C is consistent with described error-detecting code F2, receive processing as described second grouping as described first grouping.

So, error-detecting code by butt joint contracture group is carried out the inverse operation processing, thereby can receive the FCS verification of grouping reliably, and according to the error-detecting code of storing in the FCS zone, relatively discern the kind that receives grouping by single, carry out corresponding reception and handle.

In the group communication system of the 35 scheme, first communication node that transmission comprises the grouping in data area and FCS zone comprises as lower device: it selects first grouping or second grouping to send to the second communication node, wherein, described first grouping will be by storing in the FCS zone sending first error-detecting code that error-detecting code calculation process that grouping is scheduled to generate, and described second grouping will have been implemented predetermined calculation process and second error-detecting code that obtains stores in the FCS zone to described first error-detecting code.The second communication node comprises as lower device: it compares error-detecting code C1 and error-detecting code F, wherein said error-detecting code C1 generates by the error-detecting code calculation process that butt joint contracture group is scheduled to, described error-detecting code F is stored in the FCS zone that receives grouping, receives processing as described first grouping when the two is consistent; And error-detecting code C2 and error-detecting code F compared, wherein said error-detecting code C2 has implemented described predetermined calculation process to the error-detecting code that the error-detecting code calculation process of being scheduled to by butt joint contracture group generates to obtain, described error-detecting code F is stored in the FCS zone that receives grouping, receives processing as described second grouping when the two is consistent.

In the group communication system of the 36 scheme, first communication node that transmission comprises the grouping in data area and FCS zone comprises as lower device: it selects first grouping or second grouping to send to the second communication node, wherein, described first grouping will be by storing in the FCS zone sending first error-detecting code that error-detecting code calculation process that grouping is scheduled to generate, and described second grouping will have been implemented predetermined calculation process and second error-detecting code that obtains stores in the FCS zone to described first error-detecting code.The second communication node comprises as lower device: it is with error-detecting code C1, error-detecting code C2 and error-detecting code F compare, wherein said error-detecting code C1 generates by the error-detecting code calculation process that butt joint contracture group is scheduled to, described error-detecting code C2 obtains by error-detecting code C1 having been implemented predetermined calculation process, described error-detecting code F is stored in the FCS zone that receives grouping, when described error-detecting code C1 is consistent with described error-detecting code F, receive processing, when described error-detecting code C2 is consistent with described error-detecting code F, receive processing as described second grouping as described first grouping.

In the group communication system of the 37 scheme, first communication node that transmission comprises the grouping in data area and FCS zone comprises as lower device: it selects first grouping or second grouping to send to the second communication node, wherein, described first grouping will be by carrying out the error-detecting code that the first error-detecting code calculation process generates and store in the FCS zone sending grouping, and described second grouping will be by carrying out the error-detecting code that the second error-detecting code calculation process generates and store in the FCS zone sending grouping.The second communication node comprises as lower device: it compares error-detecting code C1 and error-detecting code F, wherein said error-detecting code C1 carries out the first error-detecting code calculation process by butt joint contracture group and generates, described error-detecting code F is stored in the FCS zone that receives grouping, receives processing as described first grouping when the two is consistent; And error-detecting code C2 and error-detecting code F compared, wherein said error-detecting code C2 carries out the second error-detecting code calculation process by butt joint contracture group and generates, described error-detecting code F is stored in the FCS zone that receives grouping, receives processing as described second grouping when the two is consistent.

In the group communication system of the 30 all directions case, first communication node that transmission comprises the grouping in data area and FCS zone comprises as lower device: it selects first grouping or second grouping to send to the second communication node, wherein, described first grouping will be by carrying out the error-detecting code that the first error-detecting code calculation process generates and store in the FCS zone sending grouping, and described second grouping will be by carrying out the error-detecting code that the second error-detecting code calculation process generates and store in the FCS zone sending grouping.The second communication node comprises as lower device: it is with error-detecting code C1, error-detecting code C2 and error-detecting code F compare, wherein said error-detecting code C1 carries out the first error-detecting code calculation process by butt joint contracture group and generates, described error-detecting code C2 generates carrying out the second error-detecting code calculation process by butt joint contracture group, described error-detecting code F is stored in the FCS zone that receives grouping, when described error-detecting code C1 is consistent with described error-detecting code F, receive processing, when described error-detecting code C2 is consistent with described error-detecting code F, receive processing as described second grouping as described first grouping.

In the group communication system of the 39 scheme, handle as the predetermined operation that each is described in the 33 to the 36 scheme, first error-detecting code is carried out, at least carry out in the following processing, described processing has: all of first error-detecting code are carried out bit reversal or to carrying out bit reversal or add predetermined value for first error-detecting code or deduct predetermined value for first error-detecting code in the part position of first error-detecting code.

In the group communication system of the 40 scheme, described as the 39 scheme, will implement predetermined calculation process and second error-detecting code that obtains stores described second grouping in the FCS zone into to first error-detecting code, generate two or more groupings by making up predetermined calculation process and multiple predetermined value being added and subtracted, and between first communication node and second communication node, receive and dispatch and comprise described first the grouping more than three kinds in being grouped in.

In the group communication system of the 41 scheme, as the 37 or the 30 all directions described first error-detecting code calculation process of case and the described second error-detecting code calculation process, the parameter that is used for the error-detecting code that differs from one another is carried out computing is inequality, the grouping of transmitting-receiving more than three kinds between first communication node and second communication node stored the described parameter of using more than three kinds and the error-detecting code that generates respectively in the wherein said FCS of the being grouped in zone.

In the group communication system of the 42 scheme, the kind that each described predetermined operation that first error-detecting code is carried out in the 33 to the 36 scheme is handled, with the 37 or the 30 from all directions the kind of the described error-detecting code calculation process of case make up generating the grouping more than three kinds, and between first communication node and second communication node, receive and dispatch.

In the group communication system of the 43 scheme, each described first grouping differs from one another with second grouping or its frame format of the grouping more than three kinds in the 33 to the 42 scheme.First communication node has been stored the error-detecting code that generates by the corresponding calculation process of frame format with the grouping that sends in the FCS zone of the grouping that sends.The second communication node is discerned its frame format by the error-detecting code of the grouping that receives is carried out calculation process, and handles based on the reception that the frame format that identifies is carried out described grouping.

In the group communication system of the 40 cubic case, also comprise as lower device: it generates the special frames form beyond specified standard frame format and the regulation, the described and corresponding frame format of error-detecting code as the 43 scheme.

The 45 scheme group communication system in, also comprise as lower device: its grouping that generates the special frames form is used as the grouping of the described special frames form of the 40 cubic case, describedly be grouped in fragment or a plurality of Frame that comprises the partition data frame in the data portion and obtain, and comprise storage and be used for restoring corresponding Frame and the zone of required information from described packet at described second communication node.

In the group communication system of the 46 scheme, also comprise as lower device: its by to as described in Frame cut apart, shear and paste or in conjunction with generating a plurality of packets with as the described packet of the 45 scheme, and in each packet, comprise respectively and be stored as the restored data frame and the zone of required information.

In the group communication system of the 47 scheme, also comprise as lower device: it utilizes a plurality of wireless channels to walk abreast to send or utilizes in a wireless channel spatial division multiplexing to be used for parallelly sending or utilizing a plurality of wireless channels and spatial division multiplexing to be used for the parallel described a plurality of packets of the 46 scheme that send.

In the group communication system of the 40 all directions case, also comprise as lower device: the described a plurality of packets of its following generation the 47 scheme, that is: recently adjust the grouping size ratio of each packet according to the transmission speed of each wireless channel, be equal to each other so that be defined as transmitting the grouping duration of required time.

In the group communication system of the 49 scheme, also comprise as lower device: its generation comprises the grouping in zone of the control information of communication node as described in the storage, as the grouping of the described special frames form of the 40 cubic case.

In the group communication system of the 50 scheme, also comprise as lower device: when as described in when not having data portion in the grouping of standard frame format, its generation is provided with the grouping in the zone of the control information of storing described communication node, as the grouping of the described special frames form of the 40 cubic case.

In the group communication system of the 51 scheme, also comprise as lower device: when as described in when not having data portion in the grouping of standard frame format, its generation is provided with the grouping in the zone of the transmission data of storing described communication node, as the grouping of the described special frames form of the 40 cubic case.

In the group communication system of the 52 scheme, also comprise as lower device: its generation has the grouping of the frame header beyond the regulation, as the grouping of the described special format of the 40 cubic case.

In the group communication system of the 53 scheme, also comprise as lower device: the traffic information of communication node as described in it is measured, described control information is used as the 49 or the 50 scheme.

In the group communication system of the 50 cubic case, also comprise as lower device: the information that the transfer of communication node was handled as described in it will be used to carry out is used as the 49 or the 50 described control information of scheme.

In the group communication system of the 55 scheme, also comprise as lower device: it will use as the 49 or the 50 described control information of scheme for communication node as described in making is connected to parameter required on the network.

In the group communication system of the 56 scheme, also comprise as lower device: the information of the channel access procedure of communication node was used as the 49 or the 50 described control information of scheme as described in it will be used to change.

In the group communication system of the 57 scheme, also comprise as lower device: its information with the channel allocation time of communication node as described in relevant is used as the 49 or the 50 described control information of scheme.

The 50 from all directions in the group communication system of case, also comprise as lower device: its information with communication node detected as described in relevant propagation path information, transmission rate, transmission power control is used as the 49 or the 50 described control information of scheme.

In the group communication system of the 59 scheme, each described first grouping has by carrying out the error-detecting code that mutually different calculation process generates by its transmission destination with second grouping or the grouping more than three kinds in the 33 to the 42 scheme.First communication node also comprises as lower device: it is the storage errors error detecting code in the FCS zone of the grouping that sends, and wherein said error-detecting code is to generate by the corresponding calculation process in transmission destination with the grouping that sends.The second communication node also comprises as lower device: it receives processing to the grouping that is sent to himself, and the wherein said grouping that is sent to self is to identify by the error-detecting code of the grouping that receives is carried out calculation process.

In the group communication system of the 60 scheme, each described first grouping has by carrying out the error-detecting code that mutually different calculation process generates by the kind of grouping with second grouping or the grouping more than three kinds in the 33 to the 42 scheme.First communication node also comprises as lower device: it is the storage errors error detecting code in the FCS zone of the grouping that sends, and wherein said error-detecting code is to generate by the corresponding calculation process of kind with the grouping that sends.The second communication node also comprises as lower device: its reception of carrying out a kind of grouping is handled, and wherein said this kind grouping is to identify by the error-detecting code of the grouping that receives is carried out calculation process.

In the group communication system of the 61 scheme, the described grouping kind of the 60 scheme is to discern by the identifier of the expression grouping kind that is comprised in the described grouping, and described group communication system also comprises the device of the corresponding error-detecting code of kind of use and each grouping.

In the group communication system of the 62 scheme, the described second communication node of the 60 or 61 schemes also comprises as lower device: when identifying when having received predetermined grouping by the error-detecting code of the grouping that receives being carried out calculation process, it replys processing to described grouping, and with described first communication node as managing with the corresponding communication node of special processing.

In the group communication system of the 63 scheme, the described second communication node of the 60 or 61 schemes also comprises as lower device, when identifying when having received predetermined grouping by the error-detecting code of the grouping that receives being carried out calculation process, it will represent to exist the information with the corresponding communication node of special processing to be notified to the upper strata.

In the group communication system of the 60 cubic case, the described grouping kind of the 60 scheme is corresponding with the information of the key of representing encrypted packet, and described group communication system also comprises the device that uses with the corresponding error-detecting code of each key.

Description of drawings

Fig. 1 is the schematic diagram of first execution mode of block communication method of the present invention;

Fig. 2 is the schematic diagram of second execution mode of block communication method of the present invention;

Fig. 3 is the schematic diagram of the 3rd execution mode of block communication method of the present invention;

Fig. 4 is the schematic diagram of the 4th execution mode of block communication method of the present invention;

Fig. 5 is the schematic diagram of the 5th execution mode of block communication method of the present invention;

Fig. 6 is the schematic diagram of the 6th execution mode of block communication method of the present invention;

Fig. 7 is the schematic diagram of the 7th execution mode of block communication method of the present invention;

Fig. 8 is the schematic diagram of the first embodiment of the present invention;

Fig. 9 is the schematic diagram of control grouping of transmitting between each communication node and the frame structure of the beacon packet that has control information;

Figure 10 is the schematic diagram of the second embodiment of the present invention;

Figure 11 is the schematic diagram of the frame structure of the beacon packet that has control information transmitted between each communication node;

Figure 12 is the schematic diagram of the third embodiment of the present invention;

Figure 13 is the schematic diagram of the frame structure of the beacon packet that has control information transmitted between each communication node;

Figure 14 is the schematic diagram of the fourth embodiment of the present invention;

Figure 15 is the schematic diagram of the frame structure of the beacon packet that has control information transmitted between each communication node;

Figure 16 is the schematic diagram of the fifth embodiment of the present invention;

Figure 17 is the schematic diagram of beacon packet of transmitting between each communication node that has control information and the frame structure of the packet that has control information;

Figure 18 is the schematic diagram of the sixth embodiment of the present invention;

Figure 19 is the schematic diagram of the frame structure of the beacon packet that has control information transmitted between each communication node;

Figure 20 is the schematic diagram of the seventh embodiment of the present invention;

Figure 21 is the schematic diagram of frame structure of the beacon packet of the reference format that transmits between each communication node and special format;

Figure 22 is the schematic diagram of the eighth embodiment of the present invention;

Figure 23 is the schematic diagram of the frame structure of the packet that has control information transmitted between each communication node;

Figure 24 is the schematic diagram of the ninth embodiment of the present invention;

Figure 25 is the schematic diagram of the frame structure of the poll groupings that has control information transmitted between each communication node;

Figure 26 is the schematic diagram of the tenth embodiment of the present invention;

Figure 27 is the schematic diagram of the frame structure of the packet that has control information transmitted between each communication node;

Figure 28 is the schematic diagram of the 11st embodiment of the present invention;

Figure 29 is the schematic diagram of the frame structure of the ACK grouping that has control information transmitted between each communication node;

Figure 30 is the schematic diagram of the 12nd embodiment of the present invention;

Figure 31 is the schematic diagram of the 13rd embodiment of the present invention;

Figure 32 is the schematic diagram of the frame structure of the ACK grouping that has data transmitted between each communication node;

Figure 33 is the schematic diagram of the 14th embodiment of the present invention;

Figure 34 is the schematic diagram of frame structure of the grouping of the special format that transmits between each communication node;

Figure 35 is the schematic diagram of the 15th embodiment of the present invention;

Figure 36 is the schematic diagram of the 16th embodiment of the present invention;

Figure 37 is the schematic diagram of the 17th embodiment of the present invention;

Figure 38 is the schematic diagram of the 18th embodiment of the present invention;

Figure 39 is the schematic diagram of the 19th embodiment of the present invention;

Figure 40 is the schematic diagram of the 20th embodiment of the present invention;

Figure 41 is the schematic diagram of the 21st embodiment of the present invention;

Figure 42 is the schematic diagram of the 21st embodiment of the present invention;

Figure 43 is the flow chart that expression and the communication function of the corresponding wireless station A of the 21 embodiment are confirmed processing procedure;

Figure 44 is the flow chart that expression and the packet of the corresponding wireless station A of the 21 embodiment send processing procedure 1;

Figure 45 is the flow chart that expression and the packet of the corresponding wireless station A of the 21 embodiment send processing procedure 2;

Figure 46 is the flow chart that expression and the packet of the corresponding wireless station B of the 21 embodiment receive processing procedure;

Figure 47 is the schematic diagram of the 22nd embodiment of the present invention;

Figure 48 is the flow chart that expression and the communication function of the corresponding wireless station A of the 22 embodiment are confirmed processing procedure;

Figure 49 is the flow chart that expression and the packet of the corresponding wireless station A of the 22 embodiment send processing procedure 1;

Figure 50 is the flow chart that expression and the packet of the corresponding wireless station A of the 22 embodiment send processing procedure 2;

Figure 51 is the flow chart that expression and the packet of the corresponding wireless station A of the 22 embodiment send processing procedure 3;

Figure 52 is the flow chart that expression and the packet of the corresponding wireless station A of the 22 embodiment send processing procedure 4;

Figure 53 is the flow chart that expression and the packet of the corresponding wireless station B of the 22 embodiment receive processing procedure 1;

Figure 54 is the flow chart that expression and the packet of the corresponding wireless station B of the 22 embodiment receive processing procedure 2;

Figure 55 is the block diagram of the structure example of expression group communication system of the present invention;

Figure 56 is the schematic diagram that generates the method for one or more packets from a plurality of Frames, and wherein, (1) represents cutting apart of Frame, and the shearing of (2) expression Frame is pasted, the combination of (3) expression Frame, the combination of (4) expression Frame.

Embodiment

(first execution mode)

Fig. 1 shows first execution mode of block communication method of the present invention.In addition, in first execution mode to the, seven execution modes, as first grouping of distinguishing and second grouping, suppose it is the packet of reference format and the packet of special format, or employed control grouping 1 and employed control grouping 2 in the setting of pattern 2 in the setting of pattern 1.

In Fig. 1, when sending wireless station transmission first grouping, shown in (1), the CRC sign indicating number that will generate by predetermined CRC computing stores the FCS zone into.In addition, when sending wireless station transmission second grouping, shown in (2), the CRC sign indicating number that generates by predetermined CRC computing is implemented predetermined calculation process, and store the CRC sign indicating number 2 after the conversion into the FCS zone.In addition, predetermined calculation process comprise at least carry out CRC sign indicating number 1 all bit reversal or the bit reversal of its part position or add predetermined value on the CRC sign indicating number 1 or on CRC sign indicating number 1, deduct in the predetermined value at least one handle, also can be their combination.

In receiving wireless station, butt joint contracture group is carried out the FCS verification.That is, the CRC sign indicating number (C) that will generate by predetermined CRC computing compares with receiving the CRC sign indicating number of being stored in the FCS zone of dividing into groups (F1), when the two is consistent, is identified as first grouping, and receives processing.And when C and F1 are inconsistent, CRC sign indicating number (C) and CRC sign indicating number (F2) are compared, the CRC sign indicating number of being stored in the FCS zone of wherein said CRC sign indicating number (F2) butt joint contracture group is implemented the calculation process opposite with transmit leg and is obtained, when the two is consistent, be identified as second grouping, and receive processing.In addition, also can discern second grouping by the FCS verification of C and F2 earlier, discern first grouping by the FCS verification of C and F1 again.

Here, inconsistent as C and F1, and C and F2 abandon as the grouping that comprises error code receiving grouping when inconsistent.That is, first grouping can be discerned respectively through the FCS verification with second grouping.

(second execution mode)

Fig. 2 shows second execution mode of block communication method of the present invention.In Fig. 2, when sending wireless station transmission first grouping, shown in (1), the CRC sign indicating number 1 that will generate by predetermined CRC computing stores the FCS zone into.In addition, when sending wireless station transmission second grouping, shown in (2), the CRC sign indicating number that generates by predetermined CRC computing is implemented predetermined calculation process, and store the CRC sign indicating number 2 after the conversion into the FCS zone.

In receiving wireless station, butt joint contracture group is carried out the FCS verification.Promptly, the CRC sign indicating number (F2) that the CRC sign indicating number of being stored in the CRC sign indicating number of being stored in the CRC sign indicating number (C) that will generate by predetermined CRC computing, the FCS zone that receives grouping (F1) and the FCS zone of butt joint contracture group carries out after the calculation process opposite with transmit leg compares, when C is consistent with F1, be identified as first grouping, when C is consistent with F2, be identified as second grouping, and receive processing respectively.

(the 3rd execution mode)

Fig. 3 shows the 3rd execution mode of block communication method of the present invention.In Fig. 3, when sending wireless station transmission first grouping, shown in (1), the CRC sign indicating number 1 that will generate by predetermined CRC computing stores the FCS zone into.In addition, when sending wireless station transmission second grouping, shown in (2), the CRC sign indicating number that generates by predetermined CRC computing is implemented predetermined calculation process, and store the CRC sign indicating number 2 after the conversion into the FCS zone.

In receiving wireless station, butt joint contracture group is carried out the FCS verification.That is, the CRC sign indicating number (C1) that will generate by predetermined CRC computing compares with receiving the CRC sign indicating number of being stored in the FCS zone of dividing into groups (F), is identified as first grouping when the two is consistent, and receives processing.And when C1 and F are inconsistent, to implement the calculation process identical and the CRC sign indicating number (F) stored in the CRC sign indicating number (C2) that obtains and the FCS zone that receives grouping compares to CRC sign indicating number (C1) with transmit leg, when the two is consistent, be identified as second grouping, and receive processing.In addition, also can discern second grouping by the FCS verification of C2 and F earlier, discern first grouping by the FCS verification of C1 and F again.

Here, inconsistent as C1 and F, and C2 and F abandon as the grouping that comprises error code receiving grouping when inconsistent.That is, first grouping can be discerned respectively through the FCS verification with second grouping.

(the 4th execution mode)

Fig. 4 shows the 4th execution mode of block communication method of the present invention.In Fig. 4, when sending wireless station transmission first grouping, shown in (1), the CRC sign indicating number 1 that will generate by predetermined CRC computing stores the FCS zone into.In addition, when sending wireless station transmission second grouping, shown in (2), the CRC sign indicating number that generates by predetermined CRC computing is implemented predetermined calculation process, and store the CRC sign indicating number 2 after the conversion into the FCS zone.

In receiving wireless station, butt joint contracture group is carried out the FCS verification.Promptly, the CRC sign indicating number (C1) that will generate by predetermined CRC computing, the CRC sign indicating number (F) that CRC sign indicating number (C1) has been implemented to be stored in CRC sign indicating number (C2) that the calculation process identical with transmit leg obtain and the FCS zone that receives grouping compare, when C1 is consistent with F, be identified as first grouping, when C2 is consistent with F, be identified as second grouping, and receive processing respectively.

Here, inconsistent as C1 and F, and C2 and F will receive grouping and abandon as error code when inconsistent.That is, first grouping can be discerned respectively through the FCS verification with second grouping.

(the 5th execution mode)

Fig. 5 shows the 5th execution mode of block communication method of the present invention.In Fig. 5, when sending wireless station transmission first grouping, shown in (1), will store the FCS zone into by the CRC sign indicating number 1 that generate based on the CRC computing of selecting signal 1.In addition, when sending wireless station transmission second grouping, shown in (2), will store the FCS zone into by the CRC sign indicating number 2 that generate based on the CRC computing of selecting signal 2.Here,

select signal

1,2 for example to specify in the parameter of employed generator polynomial in the CRC computing etc.

In receiving wireless station, butt joint contracture group is carried out the FCS verification.That is, will compare, when the two is consistent, be identified as first grouping, and receive processing by the CRC sign indicating number of being stored in CRC sign indicating number (C1) that generates based on the CRC computing of selecting signal 1 and the FCS zone that receives grouping (F).And when C1 and F are inconsistent, will compare by the CRC sign indicating number of being stored in CRC sign indicating number (C2) that generate based on the CRC computing of selecting signal 2 and the FCS zone that receives grouping (F), when the two is consistent, be identified as second grouping, and receive processing.In addition, also can discern second grouping by the FCS verification of C2 and F earlier, discern first grouping by the FCS verification of C1 and F again.

(the 6th execution mode)

Fig. 6 shows the 6th execution mode of block communication method of the present invention.In Fig. 6, when sending wireless station transmission first grouping, shown in (1), will store the FCS zone into by the CRC sign indicating number 1 that a CRC computing generates.In addition, when sending wireless station transmission second grouping, shown in (2), the CRC sign indicating number 2 that generates by the 2nd CRC computing is stored into the FCS zone.Here, in a CRC computing and the 2nd CRC computing, for example the parameter of employed generator polynomial etc. is different in the CRC computing.

In receiving wireless station, butt joint contracture group is carried out the FCS verification.That is, will compare, when the two is consistent, be identified as first grouping, and receive processing by the CRC sign indicating number of being stored in a CRC computing CRC sign indicating number (C1) that generates and the FCS zone that receives grouping (F).And when C1 and F are inconsistent, will compare by the CRC sign indicating number of being stored in the 2nd CRC computing CRC sign indicating number (C2) that generates and the FCS zone that receives grouping (F), when the two is consistent, be identified as second grouping, and receive processing.In addition, also can discern second grouping by the FCS verification of C2 and F earlier, discern first grouping by the FCS verification of C1 and F again.

(the 7th execution mode)

Fig. 7 shows the 7th execution mode of block communication method of the present invention.In Fig. 7, when sending wireless station transmission first grouping, shown in (1), will store the FCS zone into by the CRC sign indicating number that a CRC computing generates.In addition, when sending wireless station transmission second grouping, shown in (2), the CRC sign indicating number that generates by the 2nd CRC computing is stored into the FCS zone.

In receiving wireless station, butt joint contracture group is carried out the FCS verification.Promptly, the CRC sign indicating number of being stored in the CRC sign indicating number (C1) that will generate by a CRC computing, the CRC sign indicating number (C2) that generates by the 2nd CRC computing and the FCS zone that receives grouping (F) compares, when C1 is consistent with F, be identified as first grouping, when C2 is consistent with F, be identified as second grouping, and receive processing respectively.

More than shown in first execution mode to the, seven execution modes be used to distinguish two kinds of groupings, but by making the kind of computing that the CRC sign indicating number is carried out or be two or more to its predetermined value of adding and subtracting, can be used as grouping and have the grouping of the operation result of CRC sign indicating number with CRC sign indicating number, and generate the grouping that amounts to more than three kinds, be provided with carrying out differentiating and processing.In addition, have the grouping more than three kinds of CRC sign indicating number separately, be provided with carrying out differentiating and processing by making that the kind of parameter of CRC computing is more than three kinds, can generating.In addition, the kind of the kind by the computing that will carry out the CRC sign indicating number and the parameter of CRC computing makes up, and can generate the grouping more than three kinds, and be provided with carrying out differentiating and processing.

(first embodiment)

Fig. 8 shows the first embodiment of the present invention.Fig. 9 shows control grouping of transmitting and the frame structure that has the beacon packet of control information between each communication node.

In Fig. 8, communication node A and communication node B are the access points that connects via cable network, measure the traffic in this sub-district respectively, and the traffic information that utilizes the control grouping to come the clearing house to record.Communication node C is the portable terminal that links to each other with communication node A or communication node B via radiolink, and hypothesis is to transfer to communication node B from communication node A here.

For employed control grouping in the exchange of the control information of communication node A and communication node B, shown in Fig. 9 (1), the traffic information of each sub-district of storage in data portion, and will store the FCS zone into to the CRC sign indicating number that common CRC sign indicating number has carried out after the predetermined calculation process.In the middle of the explanation of each embodiment shown below, as the example of representational calculation process, utilization makes common CRC sign indicating number carry out obtaining behind the bit reversal " R (reverse)-FCS " and describes.Thus, in communication node A and communication node B, shown in above-mentioned first execution mode to the, seven execution modes, identify the control grouping that the grouping that receives is a special format, and obtain the traffic information of other sub-districts from data portion by R-FCS.Each communication node A and B compare the traffic information of other sub-district and the traffic information of this sub-district then, and the communication node (being communication node A here) that has detected the above difference of threshold value sends the beacon packet that has control information to its subordinate's portable terminal (being communication node C here).

Shown in Fig. 9 (2), the beacon packet that has control information is the beacon packet of having stored the special format of R-FCS, has stored in the additional control information portion that is arranged with the general control message part and has contained the control information of transferring instruction.In addition, can not want the control information portion that is had usually as beacon packet yet.It is the grouping of special format that the communication node C that receives the beacon packet that has control information identifies it by R-FCS, and obtains from additional control information portion and to transfer instruction, begins to transfer.The authentication of exchange standard form grouping between communication node C and other communication nodes when judging can communicate with communication node B the time, begins communication node B the transmitting-receiving of packet here as access point.

In addition, be switched communication amount information between access point here, and transfer portable terminal according to command forces ground from access point.As another method, also can with carried out exchange each access point the traffic information former state store in the beacon packet that has control information, be notified to portable terminal, judge whether and will transfer by portable terminal.The frame structure of the beacon packet that has control information of this moment is shown in Fig. 9 (3).

(second embodiment)

Figure 10 shows the second embodiment of the present invention.Figure 11 shows the frame structure of the beacon packet of transmitting that has control information between each communication node.

In Figure 10, communication node A and communication node B are the access points that connects via cable network, or are connected the access point on the different cable networks, and they measure the traffic in this sub-district respectively.Communication node C is the portable terminal that links to each other with communication node A or communication node B via radiolink, and hypothesis is to transfer to communication node B from communication node A here.

The traffic information that communication node A and communication node B will measure separately stores into and is notified to communication node C in the beacon packet that has control information.As shown in figure 11, the described traffic information that has beacon packet each sub-district of storage in additional control information portion of control information, and set R-FCS.Thus, in communication node C, shown in above-mentioned first to the 7th execution mode, identify the beacon packet that has control information that the grouping that receives is a special format, and obtain the traffic information of each sub-district from additional control information portion by R-FCS.

If the traffic of current communication node A in the middle of communicating surpasses threshold value, and the traffic of communication node B surpasses threshold value, and then communication node C begins to transfer to communication node B from communication node A.Then, the authentication of exchange standard form grouping between communication node C and the communication node B, when judging can communicate with communication node B the time, communication node C begins communication node B the transmitting-receiving of packet as access point.

(the 3rd embodiment)

Figure 12 shows the third embodiment of the present invention.Figure 13 shows the frame structure of the beacon packet of transmitting that has control information between each communication node.

In Figure 12, communication node A and communication node B are the access points that is connected on the different cable networks.Communication node C is the portable terminal that links to each other with communication node A or communication node B via radiolink, and hypothesis is to transfer to communication node B from communication node A here.

Communication node A and communication node B store wireless setting information and wired set information into and are notified to communication node C in the beacon packet that has control information, wherein said wireless setting information is used to be connected to himself, and described wired set information is used to be connected to the cable network that our station connects.As shown in figure 12, the described beacon packet that has control information is stored wired/wireless setting information in additional control information portion, and sets R-FCS.Here, the communication node C that communicates with communication node A detects and moves or the variation of communication environments etc., determines to transfer to communication node B.At this moment, communication node C receives the beacon packet that has control information that sends from communication node B, and to identify it by R-FCS be the beacon packet that has control information of special format, obtain wireless setting information (ESS-ID, wep key etc.) and wired set information (IP address, subnet mask, agency, default printer etc.) from additional control information portion, and the information of new communications nodes C self more.Then, the authentication of exchange standard form grouping between communication node C and the communication node B when judging can communicate with communication node B the time, begins communication node B the transmitting-receiving of packet as access point.

(the 4th embodiment)

Figure 14 shows the fourth embodiment of the present invention.Figure 15 shows the frame structure of the beacon packet of transmitting that has control information between each communication node.

In Figure 14, communication node A is the access point that is connected on the cable network.Communication node B and communication node C are the portable terminals that links to each other with communication node A via radiolink, here suppose from common communications pattern (normal communications mode), switch to central controlled communication pattern (poll pattern) based on polling technique according to the blockage of the traffic based on CSMA/CA.

Thereby increase when producing conflict continually when detecting the traffic, perhaps measure the traffic in this sub-district when exceeding threshold value, communication node A will have the beacon packet of control information and issue communication node B and communication node C.As shown in figure 15, the described beacon packet that has control information is following grouping, stored the control information of the conversion that is indicated to poll pattern in its additional control information portion, and R-FCS is set.Thus, in communication node B and communication node C, shown in above-mentioned first to the 7th execution mode, identify the beacon packet that has control information that the grouping that receives is a special format by R-FCS, obtain to be indicated to the information of the conversion of poll pattern, the more communication pattern of new communications nodes B or C self from additional control information portion.After this, send poll groupings successively to communication node B and communication node C from communication node A, and communication node B and communication C send packet in response to this.

(the 5th embodiment)

Figure 16 shows the fifth embodiment of the present invention.Figure 17 shows the frame structure of the packet of transmitting that has control information between each communication node.

In Figure 16, the annexation between communication node A, B, the C, and switch to the process of poll pattern from the normal communications mode based on CSMA/CA identical with the situation of the 4th embodiment.

The communication node B that receives poll groupings sends the packet that has control information when sending packet, wherein as control information and additional be our station institute data in buffer frame number or size of data.Shown in Figure 17 (2), the packet that has control information is stored our station institute data in buffer frame number or size of data in the data portion into as control information, and sets R-FCS.Thus, in communication node A, shown in above-mentioned first to the 7th execution mode, identify the packet that has control information that the grouping that receives is a special format by R-FCS, and obtain communication node B institute's data in buffer frame number or size of data from data portion.When described data frame number or size of data are threshold value when following, the beacon packet that has control information that communication node A will be used for being altered to from current poll pattern mode standard is sent to communication node B and communication node C.

Shown in Figure 17 (1), the beacon packet that has control information is following grouping, stored the control information of the conversion that is indicated to mode standard in its additional control information portion, and R-FCS is set.Thus, in communication node B and communication node C, shown in above-mentioned first to the 7th execution mode, identify the beacon packet that has control information that the grouping that receives is a special format by R-FCS, and obtain to be indicated to the information of the conversion of mode standard, and upgrade the communication pattern of our station from additional control information portion.

(the 6th embodiment)

Figure 18 shows the sixth embodiment of the present invention.Figure 19 shows the frame structure of the beacon packet of transmitting that has control information between each communication node.

In Figure 18, communication node A is the access point that is connected on the cable network.Communication node B and communication node C are the portable terminals that links to each other with communication node A via radiolink, here suppose from common communications pattern (normal communications mode) based on CSMA/CA, according to the blockage of the traffic, the communication pattern (sending mode continuously) that sends packet to the communication node that has obtained transmission route continuously switches.

Thereby increase when producing conflict continually when detecting the traffic, perhaps measure the traffic in this sub-district when exceeding threshold value, communication node A will have the beacon packet of control information and issue communication node B and communication node C.As shown in figure 19, the described beacon packet that has control information is following grouping, stored the control information of the conversion that is indicated to continuous sending mode in its additional control information portion, and R-FCS is set.Thus, in communication node B and communication node C, shown in above-mentioned first to the 7th execution mode, identify the beacon packet that has control information that the grouping that receives is a special format by R-FCS, obtain transitional information from additional control information portion to continuous sending mode, and the communication pattern of new communications nodes B or C self more.After this, the communication node (being communication node B here) that has obtained transmission route sends packet continuously.

In addition, in the 4th to the 6th embodiment, show the example that mode standard is carried out the communication pattern switching of poll pattern or continuous sending mode.As the communication pattern that can set by the described beacon packet that has control information or the example outside the control model of address, decentralized control pattern and special control model, DATA-ACK switch mode and RTS-CTS-DATA-ACK switch mode are for example arranged, based on the common communications pattern of rollback value change and preferential sending mode etc.In addition, also can not use beacon packet, and use being used for and all control grouping or packets of other node communication of broadcast packe and so on.

(the 7th embodiment)

Figure 20 shows the seventh embodiment of the present invention.Figure 21 shows the frame structure of the beacon packet of the reference format that transmits and special format between each communication node.

In Figure 20, communication node A is the access point that is connected on the cable network.Communication node B and communication node C are the portable terminals that links to each other with communication node A via radiolink, and the hypothesis communication node B of beacon packet that can receive special format preferentially obtains the situation of transmission route here.In addition, communication node C can't receive the beacon packet of special format.

Communication node A sends the beacon packet of the reference format with common FCS to communication node B and communication node C, and sets corresponding respectively network allocation vector (NAV).Shown in Figure 21 (1), the beacon packet of these reference formats has the NAV information (Ta) as header.Then, communication node A sends the beacon packet of the special format with common FCS sign indicating number to communication node B and communication node C.Shown in Figure 21 (2), the NAV information as header of the beacon packet of these special formats is 0, NVA is removed time T b store in the control information portion, and set R-FCS.In addition, time T b is the remainder at the moment of the beacon packet that receives special format NAV setting-up time Ta.

In communication node B, shown in above-mentioned first to the 7th execution mode, identify the beacon packet that the grouping that receives is a special format by R-FCS, obtain NAV from control information portion and remove time T b, the NAV that removes communication node B self sets.Then, in (Tb), communication node A and communication node B transmitting-receiving have packet and the ACK grouping of R-FCS during having removed that NAV sets.On the other hand, communication node C can't discern the beacon packet of the special format with R-FCS, and it is abandoned as erroneous packet.Therefore, the transmission of setting based on the NAV of communication node C suppresses to be continued.

(the 8th embodiment)

Figure 22 shows the eighth embodiment of the present invention.Figure 23 shows the frame structure of the packet of transmitting that has control information between each communication node.

In Figure 22, communication node A is the access point that is connected on the cable network.Communication node B is the portable terminal that links to each other with communication node A via radiolink, here suppose a poll pattern, wherein in response to poll groupings from communication node A, communication node B sends packet, and it is characterized in that communication node B is notified to communication node A with the hope delivery time of next time.

Communication node B is in response to from the poll groupings of communication node A and when sending packet, historical at interval or calculate the hope delivery time of next time according to the transmission in past from the notice on upper strata, and will store this packet that has control information of wishing delivery time and send to communication node A.As shown in figure 23, the next delivery time that the described grouping that has control information will be wished stores in the data portion as control information, and sets R-FCS.Thus, in communication node A, shown in above-mentioned first to the 7th execution mode, identify the packet that has control information that the grouping that receives is a special format by R-FCS, and wish delivery time from the next time that data portion obtains communication node B, on polling list, upgrade and the corresponding next delivery time of communication node B, and start timer.After this wished delivery time in arrival, communication node A was sent to communication node B with poll groupings.After this repeat above operation.

(the 9th embodiment)

Figure 24 shows the ninth embodiment of the present invention.Figure 25 shows the frame structure of the poll groupings of transmitting that has control information between each communication node.

In Figure 24, communication node A is the access point that is connected on the cable network.Communication node B and communication node C are the fixed terminals (for example sending the camera of image information) that links to each other with communication node A via radiolink, here suppose a poll pattern, wherein, in response to the poll groupings from communication node A, communication node B and communication node C send packet.

Communication node A calculates the delivery time of communication node B and communication node C according to predetermined scheduling, and the poll groupings that has control information that will store this delivery time sends (multicast) to communication node B and communication node C.Shown in Figure 25 (1), (2), the described poll groupings that has a control information stores the delivery time of each communication node in the data portion into as control information, and sets R-FCS.In addition, the frame format shown in Figure 25 (2) is suitable for changing the situation of polling sequence at every turn.Thus, in communication node B and communication node C, shown in above-mentioned first to the 7th execution mode, identify the poll groupings that has control information that the grouping that receives is a special format by R-FCS, obtain the delivery time of communication node B or C self from data portion, and start timer and carry out the transmission of packet in the corresponding moment.

(the tenth embodiment)

Figure 26 shows the tenth embodiment of the present invention.Figure 27 shows the frame structure of the packet of transmitting that has control information between each communication node.

In Figure 26, communication node A is the access point that is connected on the cable network.Communication node B is the portable terminal that links to each other with communication node A via radiolink, here it is characterized in that, communication node is measured received power or the transmission rate from relative communication node, and will be in sending next time the transmission rate of employed transmitted power or recommendation be notified to relative communication node.

Each communication node A and communication node B measure received power and transmission rate in authentication processing etc., and the initialization managing listings.Communication node A utilizes the last grouping that receives from communication node B to calculate received power or transmission rate, and sends the packet that has control information of the transmission rate of the transmitted power of having stored communication node B and recommendation.At this moment, utilize the transmitted power of the communication node B in the managing listings and transmission rate etc., send the packet that has control information.

As shown in figure 27, the described packet that has control information is stored transmitted power or recommendation transmission rate in the data portion into as control information, and sets R-FCS.Thus, in communication node B, shown in above-mentioned first to the 7th execution mode, identify the packet that has control information that the grouping that receives is a special format, and obtain transmitted power or recommend transmission rate from data portion by R-FCS.Then, the transmitted power of the communication node A in the communication node B renewal managing listings and transmission rate etc.In addition, in response to the described packet that has control information, send the ACK grouping with reference format.

In addition, communication node B utilizes the described packet that has control information to calculate received power or transmission rate, and when the packet of next time sends, send transmitted power of having stored communication node A or the packet that has control information of recommending transmission rate.At this moment, utilize the transmitted power of the communication node A in the managing listings and transmission rate to wait and send the packet that has control information.In communication node A, identify the packet that has control information that the grouping that receives is a special format by R-FCS, and obtain transmitted power and recommend transmission rate from data portion.Then, numerical value such as the transmitted power of the communication node B in the communication node A renewal managing listings or transmission rate.After this similarly repeat aforesaid operations.

(the 11 embodiment)

Figure 28 shows the 11st embodiment of the present invention.Figure 29 shows the frame structure of the ACK grouping of transmitting that has control information between each communication node.

The tenth embodiment is with the transmitted power of the other side's communication node or recommends transmission rate to store the example that sends in the packet into, and the feature of present embodiment is during described information stores is divided into groups to ACK.

Communication node A and communication node B measure received power or transmission rate in authentication processing etc., and the initialization managing listings.Communication node A utilizes the transmitted power of the communication node B in the managing listings and transmission rate to wait and sends packet.When communication node B sends the ACK grouping receiving packet, utilize the described packet that receives to calculate received power and transmission rate, and send the transmitted power of having stored communication node A or recommend the ACK grouping that has control information of transmission rate.

As shown in figure 29, the described ACK grouping that has control information is provided with the control information portion that does not have in common ACK grouping, transmitted power or recommendation transmission rate are stored in this control information portion as control information, and set R-FCS.Thus, in communication node A, shown in above-mentioned first to the 7th execution mode, identify the ACK grouping that has control information that the grouping that receives is a special format, obtain transmitted power or recommend transmission rate from control information portion by R-FCS.Then, the value of the transmitted power of the communication node B in the communication node A renewal managing listings and transmission rate etc.When sending packet, also carries out communication node B same process.

(the 12 embodiment)

Figure 30 shows the 12nd embodiment of the present invention.

In Figure 30, communication node A is the access point that is connected on the cable network.Communication node B is the portable terminal that links to each other with communication node A via radiolink, combines the processing of the tenth embodiment and the 11 embodiment here.

Each communication node A and communication node B measure received power and transmission rate in authentication processing etc., and the initialization managing listings.Communication node A utilization is calculated received power and transmission rate from the last grouping that communication node B receives, and sends the transmitted power of having stored communication node B and recommend packet transmission rate, that have control information.At this moment, utilize the transmitted power of the communication node B in the managing listings and transmission rate to wait and send the packet that has control information.

As shown in figure 27, the described packet that has control information is stored transmitted power and recommendation transmission rate in the data portion into as control information, and sets R-FCS.Thus, in communication node B, shown in above-mentioned first to the 7th execution mode, identify the packet that has control information that the grouping that receives is a special format, and obtain transmitted power or recommend transmission rate from data portion by R-FCS.Then, the value of the transmitted power of the communication node A in the communication node B renewal managing listings and transmission rate etc.

When after communication node B receives packet, sending the ACK grouping, utilize the described packet that has control information that receives to calculate received power or transmission rate, and send the transmitted power of having stored communication node A or recommend the ACK grouping that has control information of transmission rate.

As shown in figure 29, the described ACK grouping that has control information is provided with unexistent data portion in the common ACK grouping, transmitted power or recommendation transmission rate is stored in the described data portion as control information, and set R-FCS.Thus, in communication node A, shown in above-mentioned first to the 7th execution mode, identify the ACK grouping that has control information that the grouping that receives is a special format, and obtain transmitted power or recommend transmission rate from data portion by R-FCS.Then, numerical value such as the transmitted power of the communication node B in the communication node A renewal managing listings and transmission rate.After this, similarly repeat aforesaid operations.

(the 13 embodiment)

Figure 31 shows the 13rd embodiment of the present invention.Figure 32 shows the frame structure of the ACK grouping of transmitting that has data between each communication node.

In Figure 31, communication node A is the access point that is connected on the cable network.Communication node B is via radiolink and the portable terminal that communication node A links to each other, and it is characterized in that having added data in the ACK grouping.

Communication node B sends packet to communication node A.When sending the ACK grouping after communication node A receives packet, communication node A judges whether to have the Frame of issuing communication node B.Here, if having the Frame of issuing communication node B, then be sent in the ACK grouping that has data of having stored Frame in the ACK grouping.

Shown in figure 32, the described ACK grouping that has data is provided with unexistent data portion in the common ACK grouping, has stored Frame in this data portion, and has set R-FCS.Thus, in communication node B, shown in above-mentioned first to the 7th execution mode, identify the grouping that has data that the grouping that receives is a special format, obtain to issue the Frame of communication node B from data portion by R-FCS.In addition, when sending the ACK grouping, under the situation that does not have the Frame of issuing communication node B, send the ACK grouping of reference format.

(the 14 embodiment)

Figure 33 shows the 14th embodiment of the present invention.Figure 34 shows the frame structure of the grouping of the special format that transmits between each communication node.

The prerequisite of the standard of current WLAN (wireless local area network) is to send a Frame with a packet radio, and the largest amount of data portion is restricted to 2296 bytes.And therewith correspondingly, in the duration zone in mac header, the maximum setting-up time of denotable NAV is 32msec.On the other hand, when sending the grouping that surpasses this largest amount, if use low transmission rate, then the maximum setting-up time of denotable NAV can surpass maximum setting-up time 32msec in the mac header, this situation of present embodiment reply.

In Figure 33,, when the largest amount that has generated data portion surpasses the grouping of 2296 bytes (S1), judge whether the set point of NAV has surpassed maximum setting-up time Tth (S2) for example when in conjunction with a plurality of Frames.Here,, then can handle, thereby generate the grouping (S3) of reference format owing to the normal MAC header if the set point of NAV is below the Tth.And when the set point Tth of NAV surpasses the set point of NAV, because the normal MAC header can't handle, thereby generates the grouping (S4) of special format, and then operate by CRC and to set R-FCS (S5).As shown in figure 34, the grouping of special format has the special header of the figure place in the duration zone of mac header having been carried out expansion.

Thus, in the communication node of the grouping that receives described special format, shown in above-mentioned first to the 7th execution mode, identify the grouping that the grouping that receives is a special format by R-FCS, and the NAV information that can obtain to expand from duration of mac header zone is dealt with.

(the 15 embodiment)

Figure 35 shows the 15th embodiment of the present invention.

In Figure 35, communication node A, communication node B and communication node C connect via same cable network.In the past, when one of communication node on being connected same cable network sent broadcast packe, all other communication nodes that are connected on this network were handled this grouping.But, broadcast packe is not handled by making (being communication node C here) such as PDA that disposal ability is low in the communication node that is connected on the network, can offloading the CPU.Described communication node C has the function of handling R-FCS, and the grouping that will set common FCS sign indicating number abandons as erroneous packet.

Therefore, for example communication node A is used for different purposes with common FCS and R-FCS, and the broadcast packe relative with the common communications node set common FCS, and the communication node low to disposal ability sends the grouping of having set R-FCS.Thus, communication node C can abandon broadcast packe, and optionally only receives and set the grouping of R-FCS, thereby can offloading the CPU.

(the 16 embodiment)

Figure 36 shows the 16th embodiment of the present invention.

In Figure 36, communication node A, communication node B and communication node C link to each other via same cable network.Communication node A is the home server that is connected on the local area network (LAN), and communication node B is the router that is connected on the internet, and communication node C is an access point.Communication node D is the portable terminal that links to each other with communication node C via radiolink.

When communication terminal D via communication node C when local area network (LAN) sends packet, send the packet of the special format that has utilized R-FCS.In communication node C, shown in above-mentioned first to the 7th execution mode, after identify the grouping that receives by R-FCS be to issue the packet of local area network (LAN), send the grouping that receives to the communication node A that is connected on the local area network (LAN).

On the other hand, when communication node D via communication node C when the internet sends packet, send the packet of the reference format that has utilized common FCS.In communication node C, after identify the grouping that receives by common FCS be to issue the packet of internet, send the grouping that receives to the communication node B that is connected on the internet.

(the 17 embodiment)

Figure 37 shows the 17th embodiment of the present invention.

In Figure 37, communication node A is the access point that is connected via cable network on the server.Communication node B and communication node C are the portable terminals that links to each other with communication node A via radiolink, suppose that here communication node B can handle R-FCS, and communication node C can't handle R-FCS.

Communication node A converts thereof into the multi-case data grouping of the special format that has utilized R-FCS and sends after having discerned the packet that is used for the specific user of sending from server by port sequence number etc.In communication node B, shown in above-mentioned first to the 7th execution mode, can normally receive the multi-case data grouping by the identification of R-FCS.On the other hand, the communication node C multi-case data grouping that will set R-FCS abandons as erroneous packet.In addition, the multi-case data grouping of having supposed to set common FCS is that all communication nodes can receive.Thus, can easily select to send the communication node of multi-case data grouping.

(the 18 embodiment)

Figure 38 shows the 18th embodiment of the present invention.

In Figure 38, communication node A is the access point that links to each other with server via cable network.Communication node B, communication node C and communication node D are the portable terminals that links to each other with communication node A via radiolink, here suppose that communication node B can handle R-FCS1 sign indicating number and R-FCS2 sign indicating number, communication node C only can handle the R-FCS2 sign indicating number, and communication node D can't handle R-FCS1 sign indicating number and R-FCS2 sign indicating number.In addition, R-FCS1 sign indicating number and R-FCS2 sign indicating number are the CRC sign indicating numbers with multiple CRC calculation process compatibility.

Communication node A is transformed into multi-case data grouping of the special format that has utilized R-FCS1 sign indicating number or R-FCS2 sign indicating number with it and sends after having discerned the packet that is used for the specific user of sending from server by its port sequence number etc.In communication node B, shown in above-mentioned first to the 7th execution mode, can normally receive the multi-case data grouping by the identification of R-FCS1 sign indicating number or R-FCS2 sign indicating number.In communication node C, similarly can only receive corresponding multi-case data grouping by the identification of R-FCS2 sign indicating number.On the other hand, the communication node D multi-case data grouping that will set R-FCS1 sign indicating number and R-FCS2 sign indicating number abandons as erroneous packet.In addition, the multi-case data grouping of having supposed to set common FCS is that all communication nodes can receive.Thus, can easily select to send the communication node of multi-case data grouping, and can classify.

In addition, the 17, the 18 embodiment illustrated the function of having only the communication node that can handle R-FCS can normally receive predetermined grouping, but the operation that also can use similar function to receive the authentication grouping or be scheduled to.For the former situation, in embodiment described later, can be elaborated,, for example have the method for utilizing of in the communication node that receives the grouping that comprises R-FCS, lighting LED for the latter's situation.

(the 19 embodiment)

Figure 39 shows the 19th embodiment of the present invention.

In Figure 39, communication node A is connected access point on the server via cable network.Communication node B and communication node C are the portable terminals that links to each other with communication node A via radiolink, suppose that here communication node B can handle R-FCS, and communication node C can't handle R-FCS.

Communication node A is after discerning the packet that is used for the specific user that sends over from server by its port sequence number etc., implement encryption by the key that is different from common key, it is transformed into multi-case data grouping and the transmission that has utilized R-FCS.In communication node B, shown in above-mentioned first to the 7th execution mode, can discern key, and utilize this key that multi-case data is divided into groups to decipher, thereby can extract Frame by the identification of R-FCS.On the other hand, the communication node C multi-case data grouping that will set R-FCS abandons as erroneous packet.In addition, even communication node C does not abandon described multi-case data grouping and deciphers, also can can't discern required key, thereby decoding can't be carried out owing to R-FCS can't be discerned.Thus, can select to send the communication node of multi-case data grouping easily.

In addition, also can distribute and its corresponding respectively key, make it possible to only a plurality of multi-case data groupings be deciphered at corresponding respectively communication node to a plurality of R-FCS.

(the 20 embodiment)

Figure 40 shows the 20th embodiment of the present invention.

In Figure 40, communication node A is the access point that is connected on the cable network.Communication node B and communication node C are the portable terminals that links to each other with communication node A via radiolink, suppose that here communication node B can handle R-FCS, and communication node C can't handle R-FCS.

Communication node A sends the packet of the special format that has utilized R-FCS.In communication node B, shown in above-mentioned first to the 7th execution mode, the identification by R-FCS receives packet, and similarly sends the ACK grouping that has utilized R-FCS.On the other hand, the communication node C packet that will set R-FCS abandons as erroneous packet.

Communication node B is the control of beginning rollback after sending ACK grouping elapsed time DIFS.On the other hand, communication node C abandons after the packet, begins rollback control after having passed through time EIFS.Here, time EIFS equals SIFS+ (the ACK frame duration when sending with minimum speed limit)+DIFS, and satisfies EIFS＞DIFS.The stand-by time of communication node C is elongated, and consequently communication node B preferentially obtains transmission route.

(the 21 embodiment)

Figure 41 and Figure 42 show the 21st embodiment of the present invention.Here, assumed wireless station A and wireless station B can compatible utilize the special format of R-FCS, and wireless station C can not compatible utilize the special format of R-FCS.In addition, supposed to utilize the grouping of the special format of R-FCS to can be used as authentication grouping (confirming grouping and respond packet), whether be used for checking mutually between the wireless station and the special format compatibility.In addition, common FCS sign indicating number has been used in the tentation data grouping.

Whether Figure 41 shows between the wireless station B of the wireless station of compatible special format A and compatible special format, check and to confirm to handle with the compatible mutually communication function of special format and the transmitting-receiving processing of packet.Whether Figure 42 shows between the wireless station C of the wireless station of compatible special format A and incompatible special format, check and to confirm to handle with the compatible mutually communication function of special format and the transmitting-receiving processing of packet.

In Figure 41, at first, the wireless station A of compatible special format sends to wireless station B and confirms grouping P2a (S71).Described affirmation grouping P2a sets R-FCS by the structure of first to the 7th execution mode, therefore has only with special format can normally receive at the wireless station of compatibility mutually.

Wireless station B is because compatible mutually with special format thereby identify and confirm grouping P2a, and the wireless station A that identifies the transmission source and special format compatibility (S72) mutually.Then, wireless station B will represent wireless station A whether with special format mutually the information registering of compatibility in the function management table of our station.For example shown in Figure 41 (2), at this function management table record indicate each wireless station whether with many information of special format compatibility, to be associated with the ID (identification code) at each wireless station.

Wireless station B sends predetermined respond packet P2b (S73) in response to the affirmation grouping P2a that receives to the transmission source.This respond packet P2b has also set R-FCS.Wireless station A is to discerning from the respond packet P2b in response to the wireless station B of the affirmation grouping P2a that sends, and identifies wireless station B and special format compatibility (S74) mutually.Then, wireless station A will represent wireless station B whether with special format mutually the information registering of compatibility in the function management table of our station.

Wireless station A when sending packet P1a, with reference to the content of the function management table of our station, confirm to send purpose side whether with special format compatible (S75) mutually.Because the wireless station B that sends purpose side and special format compatibility mutually, thereby wireless station A is based on special format generation packet P1a in the example of Figure 41, and sends it to wireless station B (S75).This packet P1a has common FCS sign indicating number.

Wireless station B after receiving packet P1a, with reference to the function management table of our station confirm as the wireless station A in described transmission source whether with special format compatible (S76) mutually.Because wireless station A and special format compatibility mutually, thereby wireless station B handles the packet P1a (S76) that receives based on the definition (being predefined) of special format in the example of Figure 41.

Similarly, wireless station B when sending packet P1b, with reference to the content of the function management table of our station, confirm to send purpose side whether with special format compatible (S77) mutually.Because the wireless station A that sends purpose side in the example of Figure 41 and special format be compatibility mutually, thereby wireless station B generates packet P1b based on special format, and with it to wireless station A transmission (S77).This packet P1b has common FCS sign indicating number.Wireless station A after having received packet P1b, with reference to the function management table of our station confirm as its wireless station B that sends the source whether with special format compatibility (S78) mutually.Because wireless station B is compatible mutually with special format in the example of Figure 41, thereby wireless station A handles the packet P1b (S78) that receives according to the definition of special format.

In Figure 42, at first, the wireless station A compatible mutually with special format sends affirmation grouping P2a (S81) to wireless station C.This affirmation grouping P2a is set with the R-FCS shown in first to the 7th execution mode, therefore has only with special format can normally receive at the wireless station of compatibility mutually.Because wireless station C and special format are incompatible, thereby the affirmation that receives grouping P2a is judged as erroneous packet (S82).Therefore, confirm that grouping is dropped, the subsequent operation to wireless station C does not impact.

In wireless station A, because the respond packet of confirming grouping P2a is not arrived in the given time, so overtime (S83) takes place.Thus, to identify wireless station C compatible mutually with special format for wireless station A.Then, with this information registering in the function management table of wireless station A self.

Wireless station A when sending packet P1a, with reference to the content of the function management table of our station, confirm to send purpose side whether with special format compatible (S84) mutually.Because wireless station C is compatible mutually with special format, thereby wireless station A generates packet P1a based on reference format in the example of Figure 42, and with it to wireless station C transmission (S84).This packet P1a has common FCS sign indicating number.

Wireless station C receives after the packet P1a, handles (S85) according to the definition of reference format.In addition, wireless station C generates packet P1b according to reference format when sending packet P1b, and it is sent (S86) to wireless station A.This packet P1b has common CRC sign indicating number.Wireless station A after receiving packet P1b, with reference to the function management table of our station confirm as the wireless station C in this transmission source whether with special format compatible (S87) mutually.Because wireless station C and special format are incompatible, thereby wireless station A handles the packet P1b (S87) that receives according to the definition of reference format in the example of Figure 42.

So, in the present example, confirm the R-FCS of P2a and respond packet P2b that divides into groups, thereby whether compatible mutually between wireless station A, B, confirm mutually with special format by utilizing.Wireless station A, B be based on this information, respectively the reference format with common FCS or the packet of special format received processing.

(confirming processing procedure) with the communication function of the corresponding wireless station A of the 21 embodiment

Figure 43 shows with the communication function of the corresponding wireless station A of the 21 embodiment and confirms processing procedure.Among the figure, wireless station A generates communication function and confirms to use packet, with divide into groups as affirmation (S10).Then, wireless station A generates and is used for to confirming to divide into groups to carry out the CRC sign indicating number (S11) of error detection bit reversal being carried out in all positions of this CRC sign indicating number, and its result is stored in the FCS zone of confirming grouping (S12).In addition, can bit reversal not carried out in all positions yet, and bit reversal is carried out in predetermined part position, perhaps add or deduct the processing of predetermined value.

Then, wireless station A will confirm that grouping sends (S13) to the wireless station B of communication counterpart, start internal timer, be used for confirming confirming grouping back elapsed time (S14) from sending.Here, monitor the relative respond packet (S15 and S16) of affirmation grouping that whether before internal timer is overtime, has received and sent, when before overtime, receiving respond packet, it is compatible mutually with special format that wireless station A identifies the wireless station B that sends purpose side, and the wireless ID that stands of this information and transmission purpose side is registered to accordingly in the function management table of our station (S17).On the other hand, if carried out overtimely before receiving respond packet, it is compatible mutually with special format that then wireless station A identifies the wireless station B that sends purpose side, and this information and the wireless ID that stands are registered to accordingly in the function management table of our station (S18).

In addition, when also having the wireless station that to communicate by letter in addition, be back to S10 from step S19 and repeat aforesaid operations.Thus, in the information of registration shown in Figure 41 (2) in the function management table at each wireless station.Thus, whether with special format mutually compatible at each wireless station if can hold the wireless station of communication counterpart from the content of function management table.

(sending processing procedure 1) with the packet of the corresponding wireless station A of the 21 embodiment

Figure 44 shows the packet transmission processing procedure 1 with the corresponding wireless station A of the 21 embodiment.Among the figure, the wireless station A that sends processing detects whole idle channels (S21) from available all wireless channels.In fact, detect idle condition to detect by carry out carrier wave by each channel to wireless channel.If detected idle channel add up to N.When idle wireless channel is 1 to enter next procedure S22 when above.Then, wireless station A obtains the relevant information that has or not (S22) that is in the Frame of waiting for transmit status on transmission buffer.Then, if Frame to be sent such as have, then wireless station A enters next procedure S23.

Then, whether wireless station A can carry out special format communication to the wireless station that sends purpose side and discern (S23) with reference to the function management table of our station.When the wireless station C of compatibility does not send mutually with special format, identical with situation about sending to general wireless station, wireless station A generates data groupings (S24) of reference format from a Frame.On the other hand, when when the wireless station B of compatibility sends mutually with special format, wireless station A counts the packet that N generates special format according to idle wireless channel.When idle wireless channel is counted N and is 1, with situation about sending to general wireless station similarly, wireless station A utilizes a Frame to generate the grouping of data, but as what the form of packet used is and different in the past special formats (S25 and S26).When the number N of idle wireless channel is 2 when above, wireless station A utilizes one or more Frame to generate X (a plurality of) packet (S25 and S28) of special format.

When generating a data grouping in step S24 or S26, wireless station A utilizes an idle wireless channel to send this data groupings (S27).On the other hand, when the number N of idle wireless channel in step S28 is more than 2, when generating X (a plurality of) packet, use simultaneously X idle wireless channel walk abreast (simultaneously promptly) send X data divide into groups (S29).Then, wireless station A waits for that the packet that begins sends end (S30), returns step S21 then in step S27 or S29.

(sending processing procedure 2) with the packet of the corresponding wireless station A of the 21 embodiment

Figure 45 shows the packet transmission processing procedure 2 with the corresponding wireless station A of the 21 embodiment.Here, show the situation of also using space division multiplexing simultaneously, when idle wireless channel number be N, when the space division multiplexing number is L, the parallel number of data packets X that sends is defined in (in the scope of X≤NL).

Owing to can send a plurality of packets simultaneously with a wireless channel by space division multiplexing, thereby can save the processing suitable with step S25, the S26 of Figure 44.Therefore, when the wireless station and the special format of transmission purpose side were compatible mutually, wireless station A entered step S28 from step S23, generates X data grouping.Then, wireless station A uses one or more idle wireless channel and space division multiplexing simultaneously, with X parallel send (S29B) of data grouping.Other operation is identical with Figure 44.

In addition, send in the processing procedure 2 at this, suppose and in the time can using a plurality of wireless channel simultaneously, also use space division multiplexing simultaneously, even but when spendable wireless channel has only 1, also can utilize spatial division multiplexing be used for walking abreast (promptly simultaneously) send a plurality of packets.

(receiving processing procedure) with the packet of the corresponding wireless station B of the 21 embodiment

Figure 46 shows the packet reception processing procedure with the corresponding wireless station B of the 21 embodiment.Here, confirm with the packet of the usefulness of communicating by letter and to its process that receives processing, to show and the corresponding example of first execution mode shown in Figure 1 as identification communication function successively with packet (confirming to divide into groups).

In the drawings, the wireless station B that receives processing handles (S41) to the reception that a plurality of wireless channels repeat packet respectively.Here, after receiving packet, wireless station B carries out FCS verification (S42) to the packet that receives.That is, whether the CRC sign indicating number of being stored in the result of the wireless station B investigation CRC computing that grouping is scheduled to data and the FCS zone is consistent.

When receiving the packet of reference format or special format, the CRC operation result should be consistent with the CRC sign indicating number, but can produce inconsistent when error code etc. has taken place in the content of packet.In addition, when acknowledge divides into groups,, thereby produce inconsistent all the time because transmit leg has carried out bit reversal with the CRC sign indicating number in the step S12 of Figure 43.

Therefore, when detecting CRC sign indicating number unanimity, whether the destination that wireless station B confirms the packet that receives consistent with the ID of self (S43), when being when being sent to wireless station B, wireless station B carries out the packet that receives and handles (S44), if not being sent to wireless station B, then wireless station B abandons the packet (S46) that receives.

In addition, when detecting the CRC sign indicating number when inconsistent, wireless station B carries out the computing opposite with the computing of carrying out at transmit leg to the CRC sign indicating number in step S12.Here, all backs of reversing of CRC sign indicating number are deciphered the CRC sign indicating number, confirm consequently to deny and the CRC operation result of packet consistent (S45).When having produced the error code of data in the packet that is receiving, even, thereby abandon the packet (S46) that receives owing to the CRC sign indicating number is carried out bit reversal also detect inconsistently.On the other hand, when receiving the confirmation when grouping, because the unanimity as a result of bit reversal, thereby the wireless station B transmission destination whether consistent with the ID of self (S47) of confirming the affirmation grouping that receives.When receiving the affirmation grouping that is sent to wireless station B, it is compatible mutually with special format that wireless station B identifies the wireless station A in transmission source, and the wireless ID that stands in this information and transmission source registered to accordingly in self the function management table (S48).And then wireless station B sends predetermined respond packet (S49) to the wireless station A in the source of transmission.On the other hand, if the affirmation that receives grouping is not sent to wireless station B, then wireless station B abandons it (S46).

In addition, when carry out with special format compatible mutually the wireless station of operation does not receive the confirmation grouping in the past the time owing to abandon grouping after only verification is handled as FCS, thereby can not produce any problem.That is,, in such system, can not have problems even with the compatible mutually wireless station of special format with do not mix existence in the wireless station of compatibility mutually with special format yet.

(the 22 embodiment)

Figure 47 shows the 22nd embodiment of the present invention.Here, data groupings P2 (confirming grouping P2a and respond packet P2b) and packet P1 are discerned respectively and carry out corresponding reception processing, wherein said packet P2 is used to confirm whether wireless station is compatible mutually with special format, and described packet P1 has reference format and special format.For example, common FCS sign indicating number is stored in the packet of reference format, the packet storage R-FCS1 sign indicating number of special format, packet P2 storage R-FCS2 sign indicating number.Among Figure 47, wireless station A and wireless station B confirm grouping P2a and respond packet P2b by exchange, thereby identifying them mutually is wireless stations compatible mutually with special format, and with the process (S71～S74) with shown in Figure 41 processing identical of this information registering in the power management table of self.Here, confirm that grouping P2a and respond packet P2b have used the R-FCS2 sign indicating number, only with the compatible mutually wireless station of special format on can normally receive.

Wireless station A when sending packet P1a, with reference to the content of function management table of self, confirm to send purpose side whether with special format compatible (S75) mutually.Because the wireless station B that sends purpose side and special format compatibility mutually, thereby wireless station A generates packet P1a according to special format in the example of Figure 47, and with it to wireless station B transmission (S75).Set the R-FCS1 sign indicating number among this packet P1a, therefore had only with special format can normally receive this packet P1a in the wireless station of compatibility mutually.Wireless station B has received after the packet P1a, discerns special format by the FCS verification, handles (S91) according to the definition (defining in advance) of special format.

On the other hand, wireless station B when sending packet P1b, with reference to the content of function management table of self, confirm to send purpose side whether with special format compatible (S77) mutually.Because to send the wireless station A of purpose side compatible mutually with special pattern, thereby wireless station B is according to special format generation packet P1b in the example of Figure 47, and with it to wireless station A transmission (S77).Set R-FCS among this packet P1b, therefore had only with special format can normally receive at the wireless station of compatibility mutually.Wireless station A receives after the packet P1b, and identifying it by the FCS verification is special format, and handles (S92) according to the definition (defining in advance) of special format.

In addition, with the compatible mutually wireless station A of special format with not and between the compatible mutually wireless station C of special format, check whether the wireless station of the other side is confirmed to handle with the compatible mutually communication function of special format and the transmitting-receiving of packet is handled and shown in Figure 42 identical.Yet, when recipient's wireless station is compatible mutually with special format, because as shown in figure 47, coming notification data grouping P1a by the CRC sign indicating number is special format, thereby example is as shown in figure 41 confirmed the transmission source like that, and can save with reference to the process that the function management table confirms to receive the form of grouping, make efficient be improved.But, not with the compatible mutually wireless station C of special format in, when receiving the operated packet of this CRC sign indicating number it is judged as erroneous packet, needs to carry out the long usually carrier wave of time ratio and detect in the wireless local area network (WLAN) system of current use, transmission efficiency deteriorates significantly.Therefore, when with the compatible mutually wireless station of special format with do not mix when existing, use order efficient common FCS sign indicating number, shown in Figure 41 better regardless of the form of packet with the compatible mutually wireless station of special format.

(confirming processing procedure) with the communication function of the corresponding wireless station A of the 22 embodiment

Figure 48 shows with the communication function of the corresponding wireless station A of the 22 embodiment and confirms processing procedure.In the drawings, wireless station A confirms communication function the packet of usefulness is as confirming grouping and generating (S10).Then, generate the CRC sign indicating number (S11) that is used to detect with respect to confirming grouping, on this CRC sign indicating number, add constant Q, and this result is stored in the FCS zone of confirming grouping (S12B).In addition, also can not add constant Q, and deduct constant Q, perhaps add and subtract the processing of another constant Q1.Processing after this is identical with the processing procedure corresponding to the 21 embodiment shown in Figure 43.

(sending processing procedure 1) with the packet of the corresponding wireless station A of the 22 embodiment

Figure 49 shows the packet transmission processing procedure 1 with the corresponding wireless station A of the 22 embodiment.The basic processing process is identical with the processing procedure corresponding to the 21 embodiment shown in Figure 44.Here, also additional have treatment S 31 and a S32, after its CRC sign indicating number that will obtain by predetermined CRC calculation process carries out bit reversal, stores in the FCS zone of packet of the special format that generates in step S26 or S28.

(sending processing procedure 2) with the packet of the corresponding wireless station B of the 22 embodiment

Figure 50 shows the packet transmission processing procedure 2 with the corresponding wireless station B of the 22 embodiment.The basic processing process is identical with the processing procedure corresponding to the 21 embodiment shown in Figure 45.Here, also additional have a treatment S 32, after its CRC sign indicating number that will obtain by predetermined CRC calculation process carries out bit reversal, stores in the FCS zone of packet of the special format that generates in step S28.

(sending processing procedure 3) with the packet of the corresponding wireless station B of the 22 embodiment

Figure 51 shows the packet transmission processing procedure 3 with the corresponding wireless station B of the 22 embodiment.The basic processing process is identical with the processing procedure corresponding to the 21 embodiment shown in Figure 45.Here, for the generation of the packet in step S28, between reference format and special format, switch as required (S33).Then, when the packet that will generate generates with special format, the CRC sign indicating number in FCS zone is carried out bit reversal (S32), the CRC sign indicating number to the FCS zone does not apply change when generating with reference format.

Therefore, the for example idle wireless channel number of transmit leg be 1 and buffer in the data frame number be when 1 such there is no need utilizes special format, even also can send the packet of reference format mutually compatibility the time when the other side's wireless station and special format.Thereby can improve efficiency of transmission by the choice criteria form.

(sending processing procedure 4) with the packet of the corresponding wireless station B of the 22 embodiment

Figure 52 shows the packet transmission processing procedure 4 with the corresponding wireless station B of the 22 embodiment.The basic processing process is identical with the processing procedure corresponding to the 21 embodiment shown in Figure 45.Here, for the grouping of the X that in step S28, generates data, when being divided into idle wireless channel and counting N and be 1 and be to use (having added step S34) more than 2 the time.

Counting N when idle wireless channel is 2 when above, and the CRC sign indicating number in the FCS zone of data grouping is carried out bit reversal (S32), utilizes the transmission (S29C) that walks abreast of a plurality of wireless channels.On the other hand, when idle wireless channel is counted N and is 1, on the CRC sign indicating number in the FCS zone of packet, add constant Q2 (S35), in a wireless channel, utilize the spatial division multiplexing transmission (S29D) that is used for walking abreast.

That is, transmit leg uses following two patterns as required respectively: utilize a plurality of wireless channels to walk abreast and send the pattern of a plurality of packets; With utilize spatial division multiplexing to be used for the parallel pattern that sends a plurality of packets.When sending with previous pattern, the CRC sign indicating number in the FCS zone of packet is carried out bit reversal, when a later pattern sends, has added constant Q2 on the CRC sign indicating number in the FCS zone of packet.In addition, each calculation process all is an example.

(receiving processing procedure 1) with the packet of the corresponding wireless station B of the 22 embodiment

Figure 53 shows the packet reception processing procedure 1 with the corresponding wireless station B of the 22 embodiment.Here, show the process of discerning following packet successively and receiving processing, described packet has: the packet of having stored the reference format of common CRC sign indicating number in the FCS zone; The CRC sign indicating number has been carried out the packet of the special format of bit reversal; On the CRC sign indicating number, added the packet (confirming grouping) of the communication function affirmation usefulness of constant Q.

Among the figure, the wireless station B that receives operation handles (S41) to the reception that each channel in a plurality of wireless channels repeats packet respectively.Here, after receiving packet, wireless station B carries out FCS verification (S42) to the packet that receives.That is, whether the result of the wireless station B investigation CRC computing gained that grouping is scheduled to data is consistent with the CRC sign indicating number stored in the FCS zone.

When receiving the packet of reference format, the result of CRC computing should be consistent with the CRC sign indicating number, but occur inconsistent when having produced error code etc. in the content of packet when.In addition, when the packet of acknowledge grouping or special format,, perhaps in the step S31 or 32 of Figure 49, the CRC sign indicating number is carried out bit reversal, thereby produce inconsistent all the time because transmit leg adds constant Q in the step S of Figure 48 12B the CRC sign indicating number.

Therefore, when detecting CRC sign indicating number inconsistent, whether the transmission destination that wireless station B confirms the packet that receives consistent with the ID of self (S43), when being when being sent to wireless station B, wireless station B handles the packet (S44B) that receives according to reference format, if not being sent to wireless station B, then wireless station B abandons the packet (S46) that receives.

In addition, when detecting CRC sign indicating number inconsistent, wireless station B carries out the opposite computing of computing carried out with transmit leg in the step S31 of Figure 49 or S32 to the CRC sign indicating number.Here, wireless station B carries out restoring original C RC sign indicating number behind the bit reversal to all positions of CRC sign indicating number, confirms consequently to deny and the CRC operation result of packet consistent (S45).Here, when receiving the packet of special format, the result of bit reversal should be consistent with the CRC operation result, thereby the wireless station B transmission destination whether consistent with the ID of self (S47B) of confirming the packet that receives, when being when being sent to wireless station B, wireless station B handles according to special format and receives packet (S44C), and if not being sent to wireless station B, then wireless station B abandons the packet (S46) that receives.

In addition, because the result of bit reversal is inconsistent, thereby wireless station B carries out the opposite computing of computing carried out with transmit leg in the step S12B of Figure 48 to the CRC sign indicating number when receiving the confirmation when grouping.Here, deduct constant Q from the CRC sign indicating number and restore original C RC sign indicating number, confirm consequently to deny and the CRC operation result of packet consistent (S51).When having produced error code in the packet that is receiving, also can detect inconsistently even deduct constant Q from the CRC sign indicating number, thereby wireless station B abandons the packet (S46) that receives.On the other hand, when receiving the confirmation when grouping since with constant Q to deduct the result consistent, thereby the wireless station B transmission destination whether consistent with the ID of self (S47C) of confirming the affirmation grouping that receives.When the affirmation that receives grouping is when being sent to wireless station B, it is compatible mutually with special format that wireless station B identifies the wireless station in transmission source, the wireless ID that stands in this information and transmission source registered to accordingly in self the function management table (S48).In addition, send predetermined respond packet (S49) to the wireless station in the source of transmission.On the other hand, be not sent to wireless station B if confirm grouping, then wireless station B abandons it (S46).

In addition, when the wireless station of in the past operating with the incompatible execution of special format receives the confirmation the packet of grouping or special format, owing to only handling and will divide into groups to abandon, thereby can not produce any problem as erroneous packet as the FCS check errors.That is,, in such system, can not have problems even with the compatible mutually wireless station of special format with do not mix existence in the wireless station of compatibility mutually with special format yet.

(receiving processing procedure 2) with the packet of the corresponding wireless station B of the 22 embodiment

Figure 54 shows the packet reception processing procedure 2 with the corresponding wireless station B of the 22 embodiment.Here, corresponding with the packet transmission processing procedure 4 of Figure 52, receiving the process of having added on the processing procedure 1 based on the parallel type (being a plurality of wireless channels or space division multiplexing) that sends, wherein said processing procedure 1 is discerned following packet successively, and described packet has: in the FCS zone, stored the reference format of common CRC sign indicating number packet, the CRC sign indicating number has been carried out the packet (confirming grouping) that usefulness is confirmed in the packet of the special format after the bit reversal, the communication function that added constant Q on the CRC sign indicating number.

That is, in the reception processing procedure 1 of Figure 53, add step S52 and S53.In step S52, whether after the CRC sign indicating number in the FCS zone of the packet that receives deducts constant Q2, it is consistent with the calculated value of packet to investigate resulting CRC sign indicating number.In step S53, be the unanimity that detects the CRC sign indicating number at S45 or in S52 by inquiry, come the identification communication pattern.Promptly, transmit leg is carried out the step S32 of Figure 52 when detecting unanimity in step S45, thereby being to use the communication pattern of a plurality of wireless channels, transmit leg is carried out the step S35 of Figure 52 when detecting unanimity in step S52, thereby is to use the communication pattern of space division multiplexing.

In fact, recipient's wireless station B automatically switches the returning method of ACK grouping according to the communication pattern that identifies in step S53.That is, when transmit leg used a plurality of wireless channels to walk abreast a plurality of packet of transmission, the recipient used a plurality of wireless channels to return the ACK grouping by each packet that receives.In addition, when transmit leg used spatial division multiplexing to be used for a plurality of packet of parallel transmission, the recipient only returned an ACK grouping altogether at a plurality of packets that receive simultaneously, does not use space division multiplexing.

(structure example of group communication system)

Figure 55 shows the structure example of group communication system of the present invention.Here show and to utilize three wireless channel #1, #2, #3 to walk abreast to send and receive the structure of the wireless packet communication apparatus of three data groupings, but should can set arbitrarily by parallel number.In addition, when utilizing space division multiplexing by each wireless channel, the packet of the parallel transmission number that the transmission that can walk abreast is suitable with the summation of each space division multiplexing number of a plurality of wireless channels, but explanation has been omitted in space division multiplexing here.In addition, for the general communicator of wired connection, also being identical.

In the drawings, wireless packet communication apparatus comprises: transmitting-receiving handling part 10-1,10-2,10-3, transmission buffer 21, packet generating unit 22, Frame management department 23, channel status management department 24, divide group categories to send control part 25, Frame recovery portion 26 and header are removed portion 27.

Transmitting-receiving handling part 10-1,10-2,10-3 carry out radio communication with mutual different wireless channel #1, #2, #3.These wireless channels are separate because wireless frequency each other etc. are different, can utilize a plurality of wireless channels to carry out radio communication simultaneously.Each is received and dispatched handling part 10 and comprises: modulator 11, wireless transmission part 12, antenna 13, wireless receiving portion 14, demodulator 15, grouping selection portion 16 and carrier wave test section 17.

Other wireless packet communication apparatus is imported into wireless receiving portion 14 by the wireless signal that mutually different wireless channel #1, #2, #3 send by corresponding respectively transmitting-receiving handling part 10-1, the antenna 13 of 10-2,10-3.The wireless signal of 14 pairs of inputs of wireless receiving portion of each wireless channel correspondence comprises the reception processing of frequency translation, filtering, orthogonal detection and AD conversion.In addition, in each wireless receiving portion 14, when the antenna 13 that connects respectively is not used in transmission, wireless signal on the radio propagation path in each wireless channel is imported always, represents that RSSI (indication of the received signal intensity) signal of the received electric field strength of each wireless channel is output to carrier wave test section 17.In addition, when with wireless receiving portion 14 corresponding wireless channels in when having received wireless signal, handle the baseband signal that is produced and output to demodulator 15 receiving.

15 pairs of baseband signals from 14 inputs of wireless receiving portion of demodulator are carried out demodulation process respectively, and the packet that obtains is output to grouping selection portion 16.CRC check is carried out in the packet of 16 pairs of inputs of grouping selection portion, and when inerrably receiving packet, whether 16 these packets of identification of grouping selection portion send to self.Promptly, whether the transmission destination ID of grouping selection portion 16 each packet of investigation is consistent with self, the grouping that is sent to self is outputed to Frame recovery portion 26, and unshowned in the drawings send to confirm to generate in the grouping generating unit to send to confirm grouping and it passed out to modulator 11, respond processing.At this moment, when sending to the transmission of confirming grouping, also can carry out the setting of transmission speed or not use the setting of the sending mode of space division multiplexing etc.On the other hand, when for being not when being sent to the packet of self, in grouping selection portion 16, abandon described grouping.

Frame recovery portion 26 utilizes above-mentioned Frame to restore processing procedure, extracts Frame from packet.Its result is outputed to header as receiving data frames series remove portion 27.Header is removed portion 27 each Frame of being comprised from the receiving data frames series of input and is removed behind the header portion its output.

Carrier wave test section 17 will compare with the value and the pre-set threshold of the received electric field strength of this signal indication after RSSI signal input.Then, when the received electric field strength in the scheduled period during continuously less than the state continuance of pre-set threshold, carrier wave test section 17 is judged to be the wireless channel that is distributed and is in idle condition, and it is occupied to be judged to be the wireless channel that is distributed under the situation beyond this.With the corresponding carrier wave test section 17 of each wireless channel this result of determination is exported as carrier wave testing result CS1～CS3.In addition, in each transmitting-receiving handling part 10, when being in transmit status, antenna 13 do not import the RSSI signals to carrier wave test section 17.In addition, when antenna 13 has been in transmit status, can't utilize the same antenna 13 simultaneously other packets to be sent as wireless signal.Therefore, each carrier wave test section 17 is exported the occupied carrier wave testing result of wireless channel that expression is distributed when not importing the RSSI signal.

Be imported into the channel status management department 24 from carrier wave testing result CS1～CS3 with corresponding carrier wave test section 17 outputs of each wireless channel.Channel status management department 24 is based on the idle condition of managing each wireless channel with the corresponding carrier wave testing result of each wireless channel, and information such as the wireless channel of idle condition and idle channel number are notified to Frame management department 23 (being represented by the symbol a among Figure 55).

On the other hand, in transmission buffer 21, import the transmission Frame series that will send, and carry out buffer memory by transmission buffer 21.This transmission Frame series is made of one or more Frame.Transmission buffer 21 with the number of the Frame of current maintenance, as id information, the size of data of the wireless packet communication apparatus that sends the destination, be illustrated in the address information etc. of position on the buffer successively to Frame management department 23 notices (b represents by symbol).

Frame management department 23 bases are by each wireless station, destination information ID, the relevant data frame that respectively sends from transmission buffer 21 notices, information with relevant wireless channel from channel status management department 24 notice, determine which Frame how to generate packet from, and send, and be notified to transmission buffer 21, packet generating unit 22 and packet classification respectively and send control part 25 (representing) by symbol c, d, e with which wireless channel.For example, when the wireless channel of idle condition count N than in the transmission buffer 21 etc. number of data packets K to be sent after a little while, Frame management department 23 counts N with the wireless channel of idle condition and is defined as the parallel number of data packets that sends, and determine that from K Frame it is below N * Dmax that the Frame that will send makes its quantity, and will be sent to transmission buffer 21 (c represents by symbol) to the address information that these Frames carry out appointment.In addition, Frame management department 23 is notified to packet generating unit 22 with following information, and wherein said information is to generate N data groupings required (d represents by symbol) from the Frame from transmission buffer 21 inputs.In addition, Frame management department 23 is notified to branch group categories transmission control part 25 (e represents by symbol) with the corresponding relation between the wireless channel of N data grouping generating in the packet generating unit 22 and idle condition.

Transmission buffer 21 will be exported the data designated frame to 22 outputs (f represents by symbol) of packet generating unit.Packet generating unit 22 generates packet in the following manner.Promptly, packet generating unit 22 is extracted the data area from each Frame, and after having added sub-header mentioned above, shear stickup, a plurality of data blocks of grouping duration (being defined as the required time of packet that sends) have been unified in generation, in this data block the additional header that contains control information and as the CRC sign indicating number (FCS portion) of error-detecting code to generate packet, wherein said control information is the id information as the wireless station, transmission destination of the transmission destination of described packet, or the sequence number of expression data frame sequence etc.Use form or corresponding C RC sign indicating numbers such as kind or transmission destination this moment with grouping.The branch group categories sends control part 25 and carries out corresponding between each packets of packet generating unit 22 inputs and each wireless channel.

The result of described correspondence is, the packet corresponding with wireless channel #1 is imported in the modulator of receiving and dispatching in the handling part 10-1 11, the packet corresponding with wireless channel #2 is imported in the modulator of receiving and dispatching in the handling part 10-2 11, and the packet corresponding with wireless channel #3 is imported in the modulator of receiving and dispatching in the handling part 10-3 11.After having imported packet from a minute group categories

transmission control part

25,11 pairs of these packets of each modulator are implemented predetermined modulation treatment and are also outputed to wireless transmission part 12.The grouping after process the modulation treatment of modulator 11 inputs of 12 pairs of each wireless transmission parts implements to comprise that the transmission of DA conversion, frequency translation, filtering and power amplification handles, and via the wireless channel of correspondence respectively it is sent as packet from antenna 13.

Industrial applicibility

Block communication method of the present invention and group communication system are owing to can receive and dispatch between communication node Be used for distinguishing the information of a plurality of groupings, thus can carry out with the communication pattern of both sides' communication node, The form of packet and other factor etc. are corresponding to be processed. And, owing to contain the branch of these information Group can not produce to the communication of only corresponding with Control on Communication in the past communication node special impact, Thereby can consist of corresponding to the communication node of Novel Communication pattern or form and in the past communication node Mix the communication system that exists. For example, can consist of with the data area to Frame cut apart, The special format of shear pasting and generating mutually compatible communication node and not with special format compatible leading to mutually The letter node mixes the system that exists.

Claims

1. block communication method is used for transmission grouping between a plurality of communication nodes, and wherein said grouping comprises data area of having stored the information that will send and the FCS zone of having stored error-detecting code, and described block communication method is characterised in that,

First communication node selects first grouping or second grouping to send to the second communication node, wherein, first error-detecting code that described first grouping will generate by the error-detecting code calculation process that the transmission grouping is scheduled to stores in the FCS zone, second error-detecting code that described second grouping will obtain the described predetermined calculation process of first error-detecting code enforcement stores in the FCS zone

Described second communication node compares error-detecting code C and error-detecting code F1, wherein said error-detecting code C carries out described predetermined error-detecting code calculation process by butt joint contracture group to generate, described error-detecting code F1 is stored in the FCS zone that receives grouping, receives processing as described first grouping when the two is consistent; And error-detecting code C and error-detecting code F2 compared, wherein said error-detecting code C carries out described predetermined error-detecting code calculation process by butt joint contracture group to generate, described error-detecting code F2 handles the inverse operation that is stored in error-detecting code F1 in the FCS zone that receives grouping and has implemented to make the result of described predetermined calculation process to turn back to original value and obtains, and receives processing as described second grouping when the two is consistent.

2. block communication method is used for transmission grouping between a plurality of communication nodes, and wherein said grouping comprises data area of having stored the information that will send and the FCS zone of having stored error-detecting code, and described block communication method is characterised in that,

First communication node selects first grouping or second grouping to send to the second communication node, wherein, first error-detecting code that described first grouping will generate by the error-detecting code calculation process that the transmission grouping is scheduled to stores in the FCS zone, described second grouping will have been implemented predetermined calculation process and second error-detecting code that obtains stores in the FCS zone to described first error-detecting code

Described second communication node is with error-detecting code C, error-detecting code F1 and error-detecting code F2 compare, wherein said error-detecting code C carries out described predetermined error-detecting code calculation process by butt joint contracture group to generate, described error-detecting code F1 is stored in the FCS zone that receives grouping, described error-detecting code F2 handles the inverse operation that is stored in error-detecting code F1 in the FCS zone that receives grouping and has implemented to make the result of described predetermined calculation process to turn back to original value and obtains, when described error-detecting code C is consistent with described error-detecting code F1, receive processing, when described error-detecting code C is consistent with described error-detecting code F2, receive processing as described second grouping as described first grouping.

3. block communication method is used for transmission grouping between a plurality of communication nodes, and wherein said grouping comprises data area of having stored the information that will send and the FCS zone of having stored error-detecting code, and described block communication method is characterised in that,

Described second communication node compares error-detecting code C1 and error-detecting code F, wherein said error-detecting code C1 carries out described predetermined error-detecting code calculation process by butt joint contracture group to generate, described error-detecting code F is stored in the FCS zone that receives grouping, receives processing as described first grouping when the two is consistent; And error-detecting code C2 and error-detecting code F compared, wherein said error-detecting code C2 has implemented described predetermined calculation process and has obtained carry out error-detecting code that described predetermined error-detecting code calculation process generates by butt joint contracture group, described error-detecting code F is stored in the FCS zone that receives grouping, receives processing as described second grouping when the two is consistent.

4. block communication method is used for transmission grouping between a plurality of communication nodes, and wherein said grouping comprises data area of having stored the information that will send and the FCS zone of having stored error-detecting code, and described block communication method is characterised in that,

Described second communication node is with error-detecting code C1, error-detecting code C2 and error-detecting code F compare, wherein said error-detecting code C1 carries out described predetermined error-detecting code calculation process by butt joint contracture group to generate, described error-detecting code C2 obtains by error-detecting code C1 having been implemented described predetermined calculation process, described error-detecting code F is stored in the FCS zone that receives grouping, when described error-detecting code C1 is consistent with described error-detecting code F, receive processing, when described error-detecting code C2 is consistent with described error-detecting code F, receive processing as described second grouping as described first grouping.

5. block communication method is used for transmission grouping between a plurality of communication nodes, and wherein said grouping comprises data area of having stored the information that will send and the FCS zone of having stored error-detecting code, and described block communication method is characterised in that,

First communication node selects first grouping or second grouping to send to the second communication node, wherein, described first grouping will be by carrying out the error-detecting code that the first error-detecting code calculation process generates and store in the FCS zone sending grouping, described second grouping will be by carrying out the error-detecting code that the second error-detecting code calculation process generates and store in the FCS zone sending grouping

Described second communication node compares error-detecting code C1 and error-detecting code F, wherein said error-detecting code C1 carries out the described first error-detecting code calculation process by butt joint contracture group and generates, described error-detecting code F is stored in the FCS zone that receives grouping, receives processing as described first grouping when the two is consistent; And error-detecting code C2 and error-detecting code F compared, wherein said error-detecting code C2 carries out the described second error-detecting code calculation process by butt joint contracture group and generates, described error-detecting code F is stored in the FCS zone that receives grouping, receives processing as described second grouping when the two is consistent.

6. block communication method is used for transmission grouping between a plurality of communication nodes, and wherein said grouping comprises data area of having stored the information that will send and the FCS zone of having stored error-detecting code, and described block communication method is characterised in that,

Described second communication node is with error-detecting code C1, error-detecting code C2 and error-detecting code F compare, wherein said error-detecting code C1 carries out the described first error-detecting code calculation process by butt joint contracture group and generates, described error-detecting code C2 generates carrying out the described second error-detecting code calculation process by butt joint contracture group, described error-detecting code F is stored in the FCS zone that receives grouping, when described error-detecting code C1 is consistent with described error-detecting code F, receive processing, when described error-detecting code C2 is consistent with described error-detecting code F, receive processing as described second grouping as described first grouping.

7. as each described block communication method in the claim 1 to 4, it is characterized in that,

The predetermined operation of described first error-detecting code is handled one that carries out at least in the following processing, and described processing has: all of described first error-detecting code are carried out bit reversal or to carrying out bit reversal or add predetermined value for described first error-detecting code or deduct predetermined value for described first error-detecting code in the part position of described first error-detecting code.

8. block communication method as claimed in claim 7 is characterized in that,

Calculation process by will be predetermined and adding and subtracting and combine to multiple predetermined value, generate two or more groupings as described second grouping of in the FCS zone, having stored described second error-detecting code, described second error-detecting code has been implemented predetermined calculation process to described first error-detecting code and has been obtained, and receives and dispatches between described first communication node and the described second communication node and comprise described first the grouping more than three kinds in being grouped in.

9. as claim 5 or 6 described block communication methods, it is characterized in that,

In described first error-detecting code calculation process and the described second error-detecting code calculation process, adopt different parameters to produce different error-detecting codes, and the grouping of transmitting-receiving more than three kinds between described first communication node and described second communication node stored the described parameter of using more than three kinds and the error-detecting code that generates respectively in the wherein said FCS of the being grouped in zone.

10. a block communication method is characterized in that,

Kind with each described predetermined calculation process that described first error-detecting code is carried out in the claim 1 to 4, combined generating the grouping more than three kinds with the kind of claim 5 or 6 described error-detecting code calculation process, and between described first communication node and described second communication node, receive and dispatch.

11. as each described block communication method in the claim 1 to 10, it is characterized in that,

Described first grouping and described second grouping or the described grouping more than three kinds, its frame format differs from one another,

Described first communication node has been stored the error-detecting code that generates by the corresponding calculation process of frame format with the grouping that sends in the FCS zone of the grouping that sends,

Described second communication node is discerned its frame format by the error-detecting code of the grouping that receives is carried out calculation process, and handles based on the reception that the frame format that identifies is carried out described grouping.

12. block communication method as claimed in claim 11 is characterized in that,

Be the specified standard frame format or stipulate special frames form in addition with the corresponding frame format of described error-detecting code.

13. block communication method as claimed in claim 12 is characterized in that,

Described special frames form be grouped in fragment or a plurality of Frame that comprises the partition data frame in the data portion and obtain, and comprise storage and be used for zone in described second communication node required information when corresponding Frame is restored in described packet.

14. block communication method as claimed in claim 13 is characterized in that,

Paste or in conjunction with generating a plurality of packets by described Frame is cut apart, sheared, and in each packet, comprise the zone of the required information of storage restored data frame respectively.

15. block communication method as claimed in claim 14 is characterized in that,

Described a plurality of packet utilizes a plurality of wireless channels to be transmitted in parallel, or utilizes space division multiplexing to be transmitted in parallel in a wireless channel, or utilizes a plurality of wireless channels and space division multiplexing to be transmitted in parallel.

16. block communication method as claimed in claim 15 is characterized in that,

Described a plurality of packet is following generation, recently adjusts the grouping size ratio of each packet according to the transmission speed of each wireless channel that is:, is equal to each other so that be defined as transmitting the grouping duration of required time.

17. block communication method as claimed in claim 12 is characterized in that, the grouping of described special frames form comprises the zone of the control information of storing described communication node.

18. block communication method as claimed in claim 12 is characterized in that,

When not having data portion in the grouping at described standard frame format, the grouping of described special frames form is provided with the zone of the control information of the described communication node of storage.

19. block communication method as claimed in claim 12 is characterized in that,

When not having data portion in the grouping at described standard frame format, the grouping of described special frames form is provided with the zone of the transmission data of the described communication node of storage.

20. block communication method as claimed in claim 12 is characterized in that, the grouping of described special frames form has the frame header beyond the regulation.

21., it is characterized in that described control information is the traffic information of described communication node as claim 17 or 18 described block communication methods.

22., it is characterized in that described control information is to be used to carry out the information that the transfer of described communication node is handled as claim 17 or 18 described block communication methods.

23., it is characterized in that described control information is to be used for described communication node is connected to parameter required on the network as claim 17 or 18 described block communication methods.

24., it is characterized in that described control information is the information that is used to change the channel access procedure of described communication node as claim 17 or 18 described block communication methods.

25., it is characterized in that described control information is the information of the channel allocation time of relevant described communication node as claim 17 or 18 described block communication methods.

26., it is characterized in that described control information is the information of relevant described communication node the propagation path information, transmission rate or the transmission power control that are detected as claim 17 or 18 described block communication methods.

27. as each described block communication method in the claim 1 to 10, it is characterized in that,

Described first grouping has by sending destination by it with described second grouping or described grouping more than three kinds carries out the error-detecting code that mutually different calculation process generates,

Described first communication node is the storage errors error detecting code in the FCS zone of the grouping that sends, and wherein said error-detecting code is to generate by the corresponding calculation process in transmission destination with the grouping that sends,

Described second communication node receives processing to the grouping that is sent to himself, and the wherein said grouping that is sent to himself is to identify by the error-detecting code of the grouping that receives is carried out calculation process.

28. as each described block communication method in the claim 1 to 10, it is characterized in that,

Described first grouping and described second grouping or described grouping more than three kinds have by carrying out the error-detecting code that mutually different calculation process generates by the kind of grouping,

Described first communication node is the storage errors error detecting code in the FCS zone of the grouping that sends, and wherein said error-detecting code is to generate by the corresponding calculation process of kind with the grouping that sends,

Described second communication node receives processing to a kind of grouping, and the kind of wherein said grouping is to identify by the error-detecting code of the grouping that receives is carried out calculation process.

29. block communication method as claimed in claim 28 is characterized in that,

The kind of described grouping is to discern by the identifier of the kind of the described grouping of expression that is comprised in the described grouping, and has used and the corresponding error-detecting code of the kind of each grouping.

30. block communication method as claimed in claim 29 is characterized in that,

When identifying when having received predetermined grouping by the error-detecting code of the grouping that receives being carried out calculation process, described second communication node is replied processing to described grouping, and described first communication node is managed as the communication node that can handle especially.

31. block communication method as claimed in claim 29 is characterized in that,

When identifying when having received predetermined grouping by the error-detecting code of the grouping that receives being carried out calculation process, described second communication node will represent that the information of the communication node that existence can be handled especially is notified to the upper strata.

32. block communication method as claimed in claim 28 is characterized in that,

The kind of described grouping is corresponding with the information of the key of representing encrypted packet, and has used and the corresponding error-detecting code of each key.

33. a group communication system is used between a plurality of communication nodes the transmission grouping, wherein said grouping comprises data area of having stored the information that will send and the FCS zone of having stored error-detecting code, and described group communication system is characterised in that,

First communication node comprises as lower device: it selects first grouping or second grouping to send to the second communication node, wherein, first error-detecting code that described first grouping will generate by the error-detecting code calculation process that the transmission grouping is scheduled to stores in the FCS zone, described second grouping will have been implemented predetermined calculation process and second error-detecting code that obtains stores in the FCS zone to described first error-detecting code

Described second communication node comprises as lower device; It compares error-detecting code C and error-detecting code F1, wherein said error-detecting code C carries out described predetermined error-detecting code calculation process by butt joint contracture group to generate, described error-detecting code F1 is stored in the FCS zone that receives grouping, receives processing as described first grouping when the two is consistent; And error-detecting code C and error-detecting code F2 compared, wherein said error-detecting code C carries out described predetermined error-detecting code calculation process by butt joint contracture group to generate, described error-detecting code F2 handles the inverse operation that is stored in error-detecting code F1 in the FCS zone that receives grouping and has implemented to make the result of described predetermined calculation process to turn back to original value and obtains, and receives processing as described second grouping when the two is consistent.

34. a group communication system is used between a plurality of communication nodes the transmission grouping, wherein said grouping comprises data area of having stored the information that will send and the FCS zone of having stored error-detecting code, and described group communication system is characterised in that,

Described second communication node comprises as lower device: it is with error-detecting code C, error-detecting code F1 and error-detecting code F2 compare, wherein said error-detecting code C carries out described predetermined error-detecting code calculation process by butt joint contracture group to generate, described error-detecting code F1 is stored in the FCS zone that receives grouping, described error-detecting code F2 handles the inverse operation that is stored in error-detecting code F1 in the FCS zone that receives grouping and has implemented to make the result of described predetermined calculation process to turn back to original value and obtains, when described error-detecting code C is consistent with described error-detecting code F1, receive processing, when described error-detecting code C is consistent with described error-detecting code F2, receive processing as described second grouping as described first grouping.

35. a group communication system is used between a plurality of communication nodes the transmission grouping, wherein said grouping comprises data area of having stored the information that will send and the FCS zone of having stored error-detecting code, and described group communication system is characterised in that,

Described second communication node comprises as lower device: it compares error-detecting code C1 and error-detecting code F, wherein said error-detecting code C1 carries out described predetermined error-detecting code calculation process by butt joint contracture group to generate, described error-detecting code F is stored in the FCS zone that receives grouping, receives processing as described first grouping when the two is consistent; And error-detecting code C2 and error-detecting code F compared, wherein said error-detecting code C2 has implemented described predetermined calculation process and has obtained carry out error-detecting code that described predetermined error-detecting code calculation process generates by butt joint contracture group, described error-detecting code F is stored in the FCS zone that receives grouping, receives processing as described second grouping when the two is consistent.

36. a group communication system is used between a plurality of communication nodes the transmission grouping, wherein said grouping comprises data area of having stored the information that will send and the FCS zone of having stored error-detecting code, and described group communication system is characterised in that,

Described second communication node comprises as lower device: it is with error-detecting code C1, error-detecting code C2 and error-detecting code F compare, wherein said error-detecting code C1 carries out described predetermined error-detecting code calculation process by butt joint contracture group to generate, described error-detecting code C2 obtains by error-detecting code C1 having been implemented described predetermined calculation process, described error-detecting code F is stored in the FCS zone that receives grouping, when described error-detecting code C1 is consistent with described error-detecting code F, receive processing, when described error-detecting code C2 is consistent with described error-detecting code F, receive processing as described second grouping as described first grouping.

37. a group communication system is used between a plurality of communication nodes the transmission grouping, wherein said grouping comprises data area of having stored the information that will send and the FCS zone of having stored error-detecting code, and described group communication system is characterised in that,

First communication node comprises as lower device: it selects first grouping or second grouping to send to the second communication node, wherein, described first grouping will be by carrying out the error-detecting code that the first error-detecting code calculation process generates and store in the FCS zone sending grouping, described second grouping will be by carrying out the error-detecting code that the second error-detecting code calculation process generates and store in the FCS zone sending grouping

Described second communication node comprises as lower device: it compares error-detecting code C1 and error-detecting code F, wherein said error-detecting code C1 carries out the described first error-detecting code calculation process by butt joint contracture group and generates, described error-detecting code F is stored in the FCS zone that receives grouping, receives processing as described first grouping when the two is consistent; And error-detecting code C2 and error-detecting code F compared, wherein said error-detecting code C2 carries out the described second error-detecting code calculation process by butt joint contracture group and generates, described error-detecting code F is stored in the FCS zone that receives grouping, receives processing as described second grouping when the two is consistent.

38. a group communication system is used between a plurality of communication nodes the transmission grouping, wherein said grouping comprises data area of having stored the information that will send and the FCS zone of having stored error-detecting code, and described group communication system is characterised in that,

Described second communication node comprises as lower device: it is with error-detecting code C1, error-detecting code C2 and error-detecting code F compare, wherein said error-detecting code C1 carries out the described first error-detecting code calculation process by butt joint contracture group and generates, described error-detecting code C2 generates carrying out the described second error-detecting code calculation process by butt joint contracture group, described error-detecting code F is stored in the FCS zone that receives grouping, when described error-detecting code C1 is consistent with described error-detecting code F, receive processing, when described error-detecting code C2 is consistent with described error-detecting code F, receive processing as described second grouping as described first grouping.

39. as each described group communication system in the claim 33 to 36, it is characterized in that,

40. group communication system as claimed in claim 39 is characterized in that,

41. as claim 37 or 38 described group communication systems, it is characterized in that,

42. a group communication system is characterized in that,

Kind with each described predetermined calculation process that described first error-detecting code is carried out in the claim 33 to 36, combined generating the grouping more than three kinds with the kind of claim 37 or 38 described error-detecting code calculation process, and between described first communication node and described second communication node, receive and dispatch.

43. as each described group communication system in the claim 33 to 42, it is characterized in that,

Described first grouping differs from one another with described second grouping or described its frame format of grouping more than three kinds,

Described first communication node comprises as lower device: it has stored the error-detecting code that generates by the corresponding calculation process of frame format with the grouping that sends in the FCS zone of the grouping that sends,

Described second communication node comprises as lower device: it discerns its frame format by the error-detecting code of the grouping that receives is carried out calculation process, and handles based on the reception that the frame format that identifies is carried out described grouping.

44. group communication system as claimed in claim 43 is characterized in that,

Also comprise as lower device: it generates the special frames form beyond specified standard frame format or the regulation, as with the corresponding frame format of described error-detecting code.

45. group communication system as claimed in claim 44 is characterized in that,

Also comprise as lower device: it generates the grouping of special frames form, describedly be grouped in fragment or a plurality of Frame that comprises the partition data frame in the data portion and obtain, and comprise storage and be used for zone in described second communication node required information when corresponding Frame is restored in described packet.

46. group communication system as claimed in claim 45 is characterized in that,

Also comprise as lower device: its by to as described in Frame cut apart, shear and paste or in conjunction with generating a plurality of packets, and generate one or more groupings, wherein in each packet, comprise the zone of the required information of storage restored data frame respectively.

47. group communication system as claimed in claim 46 is characterized in that,

Also comprise as lower device: it utilizes a plurality of wireless channels to walk abreast to send or utilizes in a wireless channel spatial division multiplexing to be used for parallelly sending or utilizing a plurality of wireless channels and spatial division multiplexing to be used for a plurality of packets as described in parallel the transmission.

48. group communication system as claimed in claim 47 is characterized in that,

Also comprise as lower device: a plurality of packets as described in its following generation, that is: recently adjust the grouping size ratio of each packet according to the transmission rate of each wireless channel, be equal to each other so that be defined as transmitting the grouping duration of required time.

49. group communication system as claimed in claim 44 is characterized in that, also comprises as lower device: its generation comprises the grouping in zone of the control information of communication node as described in the storage, as the grouping of described special frames form.

50. group communication system as claimed in claim 44 is characterized in that,

Also comprise as lower device: when as described in when not having data portion in the grouping of standard frame format, its generation is provided with the grouping in zone of the control information of the described communication node of storage, as the grouping of described special frames form.

51. group communication system as claimed in claim 44 is characterized in that,

Also comprise as lower device: when as described in when not having data portion in the grouping of standard frame format, its generation is provided with the grouping in zone of the transmission data of the described communication node of storage, as the grouping of described special frames form.

52. group communication system as claimed in claim 44 is characterized in that, also comprises as lower device: its generation has the grouping of the frame header beyond the regulation, as the grouping of described special frames form.

53. as claim 45 or 50 described group communication systems, it is characterized in that, also comprise as lower device: the traffic information of communication node as described in it is measured, use as described control information.

54. as claim 49 or 50 described group communication systems, it is characterized in that, also comprise as lower device: the information that the transfer of communication node was handled as described in it will be used to carry out as described in control information use.

55. as claim 49 or 50 described group communication systems, it is characterized in that, also comprise as lower device: its will for communication node as described in making be connected to parameter required on the network as described in control information use.

56. as claim 49 or 50 described group communication systems, it is characterized in that, also comprise as lower device: as described in it will be used to change the information of the channel access procedure of communication node as described in control information use.

57. as claim 49 or 50 described group communication systems, it is characterized in that, also comprise as lower device: its with the information of the channel allocation time of communication node as described in relevant as described in control information use.

58. as claim 49 or 50 described group communication systems, it is characterized in that, also comprise as lower device: its with the information of propagation path information, transmission rate or transmission power control that communication node detected as described in relevant as described in control information use.

59. as each described group communication system in the claim 33 to 42, it is characterized in that,

Described first communication node also comprises as lower device: it is the storage errors error detecting code in the FCS zone of the grouping that sends, and wherein said error-detecting code is to generate by the corresponding calculation process in transmission destination with the grouping that sends,

Described second communication node also comprises as lower device: it receives processing to the grouping that is sent to himself, and the wherein said grouping that is sent to himself is to identify by the error-detecting code of the grouping that receives is carried out calculation process.

60. as each described group communication system in the claim 33 to 42, it is characterized in that,

Described first communication node also comprises as lower device: it is the storage errors error detecting code in the FCS zone of the grouping that sends, and wherein said error-detecting code is to generate by the corresponding calculation process of kind with the grouping that sends,

Described second communication node also comprises as lower device: its reception of carrying out a kind of grouping is handled, and the kind of wherein said grouping is to identify by the error-detecting code of the grouping that receives is carried out calculation process.

61. group communication system as claimed in claim 60 is characterized in that,

The kind of described grouping is to discern by the identifier of the kind of the described grouping of expression that is comprised in the described grouping, also comprises the device of the corresponding error-detecting code of kind of use and each grouping.

62. group communication system as claimed in claim 61 is characterized in that,

Described second communication node also comprises as lower device: when identifying when having received predetermined grouping by the error-detecting code of the grouping that receives being carried out calculation process, it replys processing to described grouping, and described first communication node is managed as the communication node that can handle especially.

63. group communication system as claimed in claim 61 is characterized in that,

Described second communication node also comprises as lower device, when identifying when having received predetermined grouping by the error-detecting code of the grouping that receives being carried out calculation process, its information that will represent the communication node that existence can be handled especially is notified to the upper strata.

64. group communication system as claimed in claim 60 is characterized in that,

The kind of described grouping is corresponding with the information of the key of representing encrypted packet, also comprises the device that uses with the corresponding error-detecting code of each key.