US4901313A — A-point to multi-points communication system

Claim 1

Independent Claim 132 words

An a-point to multi-points communication system comprising: a master station for transmitting an a-point to multi-points a plurality of slave stations for receiving said a-point to multi-points frame, and for returning response frames each including an indicator for indicating, to said master station, whether said a-point to multi-points frame said master station is received normally or abnormally by a slave station in response to said received a-point to multi-points frame; said master station including: counting means for counting the number of slave stations which return a response frame including an indicator indicating abnormal receiving of said a-point to multi-points frame, and detecting means for detecting whether the number of slave stations counted by said counting means is above a predetermined value indicating that said a-point to multi-point frame is to be retransmitted.

Claim 2

Dependent Claim 132 words

An a-point to multi-points communication system comprising: a master station for transmitting an a-point to multi-points a plurality of slave stations for receiving said a-point to multi-points frame, and for returning response frames each including an indicator for indicating, to said master station, whether said a-point to multi-points frame said master station is received normally or abnormally by a slave station in response to said received a-point to multi-points frame; said master station including: counting means for counting the number of slave stations which return a response frame including an indicator indicating abnormal receiving of said a-point to multi-points frame, and detecting means for detecting whether the number of slave stations counted by said counting means is above a predetermined value indicating that said a-point to multi-point frame is to be retransmitted.

Claim 3

Dependent Claim 46 words

An a-point to multi-points communication system according to claim 1, wherein said master station further comprises retransmission means for retransmitting said a-point to multi-points frame if said detecting means detects that the number of slave stations counted by said counting means is above said predetermined value.

Claim 4

Dependent Claim 147 words

An a-point to multi-points communication system comprising: a master station for transmitting an a-point to multi-points frame; and a plurality of slave stations for receiving said a-point to multi-points frame, and for returning response frame each including an indicator for indicating to said master station, whether said a-point to multi-points frame from said master station is received normally or abnormally by a slave station in response to said a-point to multi-points frame; said master station including counting means for counting the number of slave stations which returns a response frame including an indicator indicating normal receiving of said a-point to multi-points frame, and a detecting means for detecting whether the number of slave stations counted by said counting means is below a predetermined value indicating that said a-point to multi-points frame is to be retransmitted after a time delay, in response to said a-point to multi-points frame.

Claim 5

Dependent Claim 147 words

An a-point to multi-points communication system comprising: a master station for transmitting an a-point to multi-points frame; and a plurality of slave stations for receiving said a-point to multi-points frame, and for returning response frame each including an indicator for indicating to said master station, whether said a-point to multi-points frame from said master station is received normally or abnormally by a slave station in response to said a-point to multi-points frame; said master station including counting means for counting the number of slave stations which returns a response frame including an indicator indicating normal receiving of said a-point to multi-points frame, and a detecting means for detecting whether the number of slave stations counted by said counting means is below a predetermined value indicating that said a-point to multi-points frame is to be retransmitted after a time delay, in response to said a-point to multi-points frame.

Claim 6

Dependent Claim 46 words

An a-point to multi-points communication system according to claim 3, wherein said master station further comprises: retransmission means for retransmission said a-point to multi-points frame if said detecting means detects that the number of slave stations counted by said counting means is below said predetermined value.

Claim 7

Dependent Claim 135 words

An a-point to multi-points communication system comprising: a master station for transmitting an a-point to multi-points frame; and a plurality of slave stations for receiving said a-point to multi-points frame, and for returning response frames each including an indicator for requesting, from said master station, retransmission of said a-point to multi-point frame in case where said a-point to multi-points frame is not received by a slave station, in response to said a-point to multi-points frame; said master station including counting means for counting the number of slave stations which return response frame including an indicator requesting retransmission of said a-point to multi-points frame, and a detection means for detecting whether the number of slave stations counted by said counting means is above a predetermined value indicating a request for retransmitting said a-point to multi-point frame.

Claim 8

Dependent Claim 135 words

An a-point to multi-points communication system comprising: a master station for transmitting an a-point to multi-points frame; and a plurality of slave stations for receiving said a-point to multi-points frame, and for returning response frames each including an indicator for requesting, from said master station, retransmission of said a-point to multi-point frame in case where said a-point to multi-points frame is not received by a slave station, in response to said a-point to multi-points frame; said master station including counting means for counting the number of slave stations which return response frame including an indicator requesting retransmission of said a-point to multi-points frame, and a detection means for detecting whether the number of slave stations counted by said counting means is above a predetermined value indicating a request for retransmitting said a-point to multi-point frame.

Claim 9

Dependent Claim 45 words

An a-point to multi-points communication system according to claim 5, wherein said master station further comprises: retransmission means for retransmitting said a-point to multi-points frame if said detecting means detects that number of slave stations counted by said counting means is above said predetermined value.

Claim 10

Dependent Claim 149 words

An a-point to multi-points communication system comprising: a master station for transmitting an a-point to multi-point frame; and a plurality of slave stations for receiving said a-point to multi-points frame and for returning response frames each including an indicator for indicating, to said master station, whether said a-point to multi-points frame from said master station is received normally or abnormally by said slave station in response to said received a-point to multi-points frame; said master station including: counting means for counting the number of slave stations which return frame including an indicator indicating abnormal receiving or normal receiving of said a-point to multi-points frame, and a detecting means for detecting whether the number of slave stations counted by said counting means is above a predetermined value indicating that said a-point to multi-points frame is to be retransmitted after a time delay, in response to said a-point to multi-points frame.

Claim 11

Dependent Claim 149 words

An a-point to multi-points communication system comprising: a master station for transmitting an a-point to multi-point frame; and a plurality of slave stations for receiving said a-point to multi-points frame and for returning response frames each including an indicator for indicating, to said master station, whether said a-point to multi-points frame from said master station is received normally or abnormally by said slave station in response to said received a-point to multi-points frame; said master station including: counting means for counting the number of slave stations which return frame including an indicator indicating abnormal receiving or normal receiving of said a-point to multi-points frame, and a detecting means for detecting whether the number of slave stations counted by said counting means is above a predetermined value indicating that said a-point to multi-points frame is to be retransmitted after a time delay, in response to said a-point to multi-points frame.

Claim 12

Dependent Claim 46 words

An a-point to multi-points communication system according to claim 7, wherein said master station further comprises: retransmission means for retransmitting said a-point to multi-points frame if said detecting means detects that the number of slave stations counted by said counting means is below said predetermined value.

Claim 13

Dependent Claim 107 words

An a-point to multi-points communication system according to claim 7, wherein said master station further comprises: a transmission means for transmitting a requesting frame of said response frame; first detecting means detecting the number of slave stations which return said response frame including information indicative of normal and abnormal receiving of said a-point to multi-points frame; and second detecting means for detecting whether the number detected by said first detecting means is more than a predetermined value which is a value between zero and the number of all of said slave stations, after a time delay of said response frame which is responsive to said requesting frame.

Claim 14

Dependent Claim 46 words

An a-point to multi-points communication system according to claim 9, wherein said master station further comprises: retransmission means for retransmitting said a-point to multi-points frame when said second detecting means detects that the number detected by said first detecting means is less than said predetermined value.

Claim 15

Dependent Claim 110 words

An a-point to multi-points communication system having a master station for transmitting an a-point to multi-points frame and a plurality of slave stations for receiving said a-point to multi-points frame, each of said slave station comprising: executing means for executing a division of a sequence number assigned to said a-point to multi-points frame by a first value (X) which is predetermined at random being in common to all of said slave stations; and transmitting means for transmitting a response frame in response to said a-point to multi-points frame if a residue of said division coincides with a second value Yi, where 0≦Yi≦S≦1[Yi<X], which is preassigned to said each slave station.

Claim 16

Dependent Claim 110 words

An a-point to multi-points communication system having a master station for transmitting an a-point to multi-points frame and a plurality of slave stations for receiving said a-point to multi-points frame, each of said slave station comprising: executing means for executing a division of a sequence number assigned to said a-point to multi-points frame by a first value (X) which is predetermined at random being in common to all of said slave stations; and transmitting means for transmitting a response frame in response to said a-point to multi-points frame if a residue of said division coincides with a second value Yi, where 0≦Yi≦S≦1[Yi<X], which is preassigned to said each slave station.

Claim 17

Dependent Claim 103 words

An a-point to multi-points communication system according to claim 11, wherein said each slave station further comprises: inserting means for inserting, in said response frame, information indicative of normal receiving or abnormal receiving of individual a-point to multi-points frames corresponding to each sequence numbers lying between a sequence number, subsequent to a sequence number to be assigned to a latest a-point to multi-points frame in response to which said one slave station has transmitted a response frame previously, and said sequence number assigned to said a-point to multi-points frame in response to which said one slave station decides to transmit said response frame.

Claim 18

Dependent Claim 114 words

An a-point to multi-points communication system having a master station for transmitting an a-point to multi-points frame and a plurality of slave stations for receiving said a-point to multi-points frame and for returning response frames in response to said a-point to multi-points frame, said slave stations being divided into a plurality of groups, said master station comprising: detection means for detecting whether a number of slave stations in each of said groups which transmit said response frame including information indicative of abnormal receiving of said a-point to multi-points frame from said master station is greater than a predetermined value, said number being between zero and a number of all slave stations in each group.

Claim 19

Dependent Claim 114 words

An a-point to multi-points communication system having a master station for transmitting an a-point to multi-points frame and a plurality of slave stations for receiving said a-point to multi-points frame and for returning response frames in response to said a-point to multi-points frame, said slave stations being divided into a plurality of groups, said master station comprising: detection means for detecting whether a number of slave stations in each of said groups which transmit said response frame including information indicative of abnormal receiving of said a-point to multi-points frame from said master station is greater than a predetermined value, said number being between zero and a number of all slave stations in each group.

Claim 20

Dependent Claim 60 words

An a-point to multi-points communication system according to claim 13, wherein said master station further comprises: retransmission means for retransmitting, if said detection means detects a group in which the number of slave stations being in abnormal receiving of said a-point to multi-points frame exceeds said predetermined value, said a-point to multi-points frame to said slave stations in said group.

Claim 21

Dependent Claim 70 words

An a-point to multi-points communication system according to claim 13, wherein said master station further comprises: disconnection means for disconnecting, if said detection means detects a group in which the number of slave stations being in abnormal receiving of said a-point to multi-points frame exceeds said predetermined value, a salve station in said group from an object of communication to which said master station transmits said a-point to multi-points frame.

Claim 22

Dependent Claim 68 words

An a-point to multi-points communication system according to claim 15, wherein said master station further comprises: retransmission means for retransmitting, after completion of transmission of a predetermined number of a-point to multi-points frame to slave stations in groups excepting a group disconnected from said object of communication, said predetermined number of a-point to multi-points frames to said slave stations in said group disconnected from said object of communication.

Claim 23

Dependent Claim 113 words

An a-point to multi-points communication system having a master station for transmitting an a-point to multi-points frame and a plurality of slave stations for receiving said a-point to multi-points frame and for returning response frames responsive to said a-point to multi-points frame, said slave stations being divided into a plurality of groups, said master station comprising: detection means for detecting whether the number of slave stations in each of said groups which transmitted a response frame including information indicative of normal receiving of said a-point to multi-points frame from said master station, is less than a predetermined value which is a value between zero and the number of slave stations in each group.

Claim 24

Dependent Claim 113 words

An a-point to multi-points communication system having a master station for transmitting an a-point to multi-points frame and a plurality of slave stations for receiving said a-point to multi-points frame and for returning response frames responsive to said a-point to multi-points frame, said slave stations being divided into a plurality of groups, said master station comprising: detection means for detecting whether the number of slave stations in each of said groups which transmitted a response frame including information indicative of normal receiving of said a-point to multi-points frame from said master station, is less than a predetermined value which is a value between zero and the number of slave stations in each group.

Claim 25

Dependent Claim 61 words

An a-point to multi-points communication system according to claim 17, wherein said master station further comprises: retransmission means for retransmitting, if said detection means detects a group in which the number of slave stations being in normal receiving of said a-point to multi-points frame is less than said predetermined value, said a-point to multi-points frame to slave stations in said group.

Claim 26

Dependent Claim 71 words

An a-point to multi-points communication system according to claim 17, wherein said master station further comprises: disconnection means for disconnecting, if said detection means detects a group in which the number of slave stations being in normal receiving of said a-point to multi-points frame is less than said predetermined value, slave stations in said group from an object of communication to which said master station transmits said a-point to multi-points frame.

Claim 27

Dependent Claim 67 words

An a-point to multi-points communication system according to claim 19, wherein said master station further comprises: retransmission means for retransmitting, after completion of transmission of a predetermined number of a-point to multi-points frames to slave stations in groups excepting a group disconnected from said object of, said predetermined number of a-point to multi-points frames to said slave stations in said group disconnected from said object of communication.

Claim 28

Dependent Claim 130 words

An a-point to multi-points communication system having a master station for transmitting an a-point to multi-points frame and a plurality of slave stations for receiving said a-point to multi-points frame and for returning response frames responsive to said a-point to multi-points frame, said slave stations being divided into a plurality of groups, each of said slave stations comprising: executing a division of a sequence number assigned to said a-point to multi-points frame by a first value (X) which is predetermined at random as being common to all of said slave stations: and a transmitting means for transmitting a response frame responsive to said a-point to multi-points frame if a residue of said division coincides with a second value Yi, where 0≦Yi≦X-1 [Yi<X], which is preassigned to said each slave station.

Claim 29

Dependent Claim 130 words

An a-point to multi-points communication system having a master station for transmitting an a-point to multi-points frame and a plurality of slave stations for receiving said a-point to multi-points frame and for returning response frames responsive to said a-point to multi-points frame, said slave stations being divided into a plurality of groups, each of said slave stations comprising: executing a division of a sequence number assigned to said a-point to multi-points frame by a first value (X) which is predetermined at random as being common to all of said slave stations: and a transmitting means for transmitting a response frame responsive to said a-point to multi-points frame if a residue of said division coincides with a second value Yi, where 0≦Yi≦X-1 [Yi<X], which is preassigned to said each slave station.

Claim 30

Dependent Claim 93 words

An a-point to multi-points communication system according to claim 21, wherein said each slave station further comprises: inserting means for inserting, in said response frame, information indicative of normal receiving or abnormal receiving of individual a-point to multi-points frames corresponding to sequence numbers lying between a each sequence number, subsequent to a sequence number to be assigned to a latest a-point to multi-points frame in response frame previously, and said sequence number assigned to said a-point to multi-points frame in response to which said one slave station decides to transmit said response frame.

Claim 31

Dependent Claim 139 words

An a-point to multi-points communication system having a master station for transmitting an a-point to multi-points frame and a plurality of slave stations for receiving said a-point to multi-points frame and for returning response frames in response to said a-point to multi-points frame, said slave stations being divided into a plurality of groups, each of said slave stations comprising: executing means for executing a division of a sequence number assigned to said a-point to multi-points frame by a first value (X) which predetermined at random as being in common to all of said slave stations; and a transmitting means for transmitting a response frame responsive to said a-point to multi-points frame if a residue of said division coincides with a second value Yi, where 0≦Yi≦X-1 [Yi<X], which is equally predetermined for all slave stations being in a same group.

Claim 32

Dependent Claim 139 words

An a-point to multi-points communication system having a master station for transmitting an a-point to multi-points frame and a plurality of slave stations for receiving said a-point to multi-points frame and for returning response frames in response to said a-point to multi-points frame, said slave stations being divided into a plurality of groups, each of said slave stations comprising: executing means for executing a division of a sequence number assigned to said a-point to multi-points frame by a first value (X) which predetermined at random as being in common to all of said slave stations; and a transmitting means for transmitting a response frame responsive to said a-point to multi-points frame if a residue of said division coincides with a second value Yi, where 0≦Yi≦X-1 [Yi<X], which is equally predetermined for all slave stations being in a same group.

Claim 33

Dependent Claim 107 words

An a-point to multi-points communication system according to claim 23, wherein said each slave station further comprises: inserting means for inserting, in said response frame, information indicative of normal receiving or abnormal receiving of individual a-point to multi-points frames corresponding to sequence numbers lying between a sequence number lying between a sequence number, subsequent to a sequence number to be assigned to a latest a-point to multi-points frame in response to which said one slave station has transmitted a response frame previously, and said sequence number assigned to said a-point to multi-points frame in response to which said one slave station decides to transmit said response frame.

Claim 34

Dependent Claim 101 words

An a-point to multi-points communication system having a master station for transmitting an a-point to multi-points frame and a plurality of slave stations for receiving said a-point to multi-points frame and for returning a response frame responsive to a-point to multi-points frame, each of said slave stations comprising: responding means for allowing one of said slave stations having at least an a-point to multi-points frame to be transmitted after completion of transmission of said a-point to multi-points frame from said master station to insert in said response frame, information for requesting acquisition of a permission to be a next master station.

Claim 35

Dependent Claim 101 words

An a-point to multi-points communication system having a master station for transmitting an a-point to multi-points frame and a plurality of slave stations for receiving said a-point to multi-points frame and for returning a response frame responsive to a-point to multi-points frame, each of said slave stations comprising: responding means for allowing one of said slave stations having at least an a-point to multi-points frame to be transmitted after completion of transmission of said a-point to multi-points frame from said master station to insert in said response frame, information for requesting acquisition of a permission to be a next master station.

Claim 36

Dependent Claim 62 words

An a-point to multi-points communication system according to claim 25, wherein said master station comprises: master station decision means for deciding, in accordance with a predetermined priority rule, said slave station which should act as the next master station if said master station receives said response frame including the information for requesting acquisition of the permission to be a next master station.

Claim 37

Dependent Claim 141 words

An a-point to multi-points communication system comprising: a master station for transmitting an a-point to multi-points frame which includes a sequence number; and a plurality of slave stations for receiving said a-point to multi-points frame to said master station and for returning response frames each including an indicator for indicating whether said a-point to multi-points frame from said master station is received normally or abnormally by a salve station in response to said received a-point to multi-points frame; each of said slave stations comprises memory means for storing an indicator for indicating whether said a-point to multi-points frame from said master station is received normally or abnormally corresponding to said sequence number and for generating said response frame with said indicator, and returning means for returning a response frame including an indicator in response to said received a-point to multi-points frame.

Claim 38

Dependent Claim 141 words

An a-point to multi-points communication system comprising: a master station for transmitting an a-point to multi-points frame which includes a sequence number; and a plurality of slave stations for receiving said a-point to multi-points frame to said master station and for returning response frames each including an indicator for indicating whether said a-point to multi-points frame from said master station is received normally or abnormally by a salve station in response to said received a-point to multi-points frame; each of said slave stations comprises memory means for storing an indicator for indicating whether said a-point to multi-points frame from said master station is received normally or abnormally corresponding to said sequence number and for generating said response frame with said indicator, and returning means for returning a response frame including an indicator in response to said received a-point to multi-points frame.

Claim 39

Dependent Claim 88 words

An a-point to multi-points communication system according to claim 27, wherein said each slave station further comprises: detecting means for detecting whether a difference between said sequence number included in said a-point to multi-points frame and a sequence number included in an a-point to multi-points frame which is received later is two or more; and said memory means further storing an indicator of abnormal receiving of at least an a-point to multi-points frame which should have a sequence number lying in said difference detected by said detecting means.

Claim 40

Dependent Claim 125 words

An a-point to multi-points communication system comprising: a master station for transmitting an a-point to multi-points frame; and a plurality of slave stations for receiving said a-point to multi-points frame from said master station and for returning response frames to said master station, in response to said a-point to multi-points frame received from said master station; said master station comprises obtaining means for obtaining a receiving status of said a-point to multi-points frame included in said response frames from said slave stations, classifying means for classifying said receiving status, selection means for selecting a control content from a retransmission of said a-point to multi-points frame, a transmission of a next a-point to multi-points frame, and a suspension of transmitting, responsive to said classified receiving status.

Claim 41

Dependent Claim 125 words

An a-point to multi-points communication system comprising: a master station for transmitting an a-point to multi-points frame; and a plurality of slave stations for receiving said a-point to multi-points frame from said master station and for returning response frames to said master station, in response to said a-point to multi-points frame received from said master station; said master station comprises obtaining means for obtaining a receiving status of said a-point to multi-points frame included in said response frames from said slave stations, classifying means for classifying said receiving status, selection means for selecting a control content from a retransmission of said a-point to multi-points frame, a transmission of a next a-point to multi-points frame, and a suspension of transmitting, responsive to said classified receiving status.

Claim 42

Dependent Claim 148 words

In an a-point to multi-points communication system including a master station for transmitting an a-point to multi-points frame and a plurality of slave stations for receiving said a-point to multi-points frame and returning response frames each including an indicator for indicating to said master station whether said a-point to multi-points frame from said master station is received normally or abnormally by a slave station in response to said received a-point to multi-points frame, said master station comprising: counting means for counting the number of slave stations which return a response frame including an indicator indicating abnormal receiving of said a-point to multi-points frame; detecting means for detecting whether the number counted by said counting means is above a predetermined value; and retransmission means for retransmitting said a-point to multi-points frame if said detecting means detects that the number counted by said counting means is above said predetermined value.

Claim 43

Dependent Claim 148 words

In an a-point to multi-points communication system including a master station for transmitting an a-point to multi-points frame and a plurality of slave stations for receiving said a-point to multi-points frame and returning response frames each including an indicator for indicating to said master station whether said a-point to multi-points frame from said master station is received normally or abnormally by a slave station in response to said received a-point to multi-points frame, said master station comprising: counting means for counting the number of slave stations which return a response frame including an indicator indicating abnormal receiving of said a-point to multi-points frame; detecting means for detecting whether the number counted by said counting means is above a predetermined value; and retransmission means for retransmitting said a-point to multi-points frame if said detecting means detects that the number counted by said counting means is above said predetermined value.

Claim 44

Dependent Claim 149 words

A retransmitting method for controlling a master station in an a-point to multi-points communication system including said master station for transmitting an a-point to multi-points frame and a plurality of slave stations for receiving said a-point to multi-points frame and returning response frames each including an indicator for indicating, to said master station, whether said a-point to multi-points frame from said master station is received normally or abnormally by a slave station in response to said received aa-point to multi-points frame, said retransmitting method comprising of: counting the number of slave stations which returns a response frame including an indicator which indicates abnormal receiving of said a-point to multi-points frame; detecting whether the number counted in the counting step is above a predetermined value; and retransmitting said a-point to multi-points frame if said detecting means detects that the number counted in the counting step is above said predetermined value.

Claim 45

Dependent Claim 149 words

A retransmitting method for controlling a master station in an a-point to multi-points communication system including said master station for transmitting an a-point to multi-points frame and a plurality of slave stations for receiving said a-point to multi-points frame and returning response frames each including an indicator for indicating, to said master station, whether said a-point to multi-points frame from said master station is received normally or abnormally by a slave station in response to said received aa-point to multi-points frame, said retransmitting method comprising of: counting the number of slave stations which returns a response frame including an indicator which indicates abnormal receiving of said a-point to multi-points frame; detecting whether the number counted in the counting step is above a predetermined value; and retransmitting said a-point to multi-points frame if said detecting means detects that the number counted in the counting step is above said predetermined value.

Claim 46

Independent Claim 141 words

A method for communication in an a-point to multi-points communication system, said method comprising steps of: transmitting information from a master station; receiving said information at a plurality of slave stations; returning response frames, each including an indicator for indicating to said master station whether said information from said master station is received normally or abnormally at said slave stations in response to said received information; counting the number of slave stations which returns a response frame including an indicator which indicates abnormal receiving of said a-point to multi-points frame at said master station; detecting whether the number counted in the counting step is above a predetermined value at said master station; and retransmitting said a-point to multi-points frame if said detecting means detects that the number counted in the counting step is above said predetermined value at said master station.

Claim 47

Independent Claim 141 words

A method for communication in an a-point to multi-points communication system, said method comprising steps of: transmitting information from a master station; receiving said information at a plurality of slave stations; returning response frames, each including an indicator for indicating to said master station whether said information from said master station is received normally or abnormally at said slave stations in response to said received information; counting the number of slave stations which returns a response frame including an indicator which indicates abnormal receiving of said a-point to multi-points frame at said master station; detecting whether the number counted in the counting step is above a predetermined value at said master station; and retransmitting said a-point to multi-points frame if said detecting means detects that the number counted in the counting step is above said predetermined value at said master station.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1993-02-12	1993-08-14	1994-02-13	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1997-02-12	1997-08-14	1998-02-13	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2001-02-12	2001-08-14	2002-02-13	$7700.00	Window Closed / Lapsed

A-point to multi-points communication system

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