Patent EP0901253A2 successfully refreshed from Google Patents.
EP0901253A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Transmission control method
Assignee: NEC Corp
•
Filing: 1998-09-01
•
Granted: —
•
Expires: 2018-09-01
Abstract
Abstract A transmission control method is provided which can improve a decrease in throughput when collision occurs during the use of a collision-based access system. In response to forward link message DA11(I,0) from a radio base station 10, a terminal 11 transmits a packet signal D11(0) while a terminal 12 transmits a packet signal D12(0). When the packet signals collide head-on, the radio base station 10 does not receive them but transmits forward link message D12(I,0). When the terminals 11 and 12 receive the forward link message, they judge that the packet signals transmitted by themselves have collided head-on and then transfers to a back-off state in which random time transmission is sustained. When forward link message DA13(I,0) is received from the radio base station 10, the terminal 12 restored from the back-off state retransmits the packet signal D12(0). Meanwhile, the terminal 11 is changed to a back-off state when receiving forward link message DA15(P,11) from the radio base station 10. The terminal 11 does not originally transmit a packet signal but retransmits the packet signal D11(0) because transmission request from the radio base station.
Inventors
- 👤 Masanori Taketsugu
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 03:11
CPC Classifications
H; H04; H04W; H04W74/00; H04W74/02; H04W74/04; H04W74/06; H04W74/08; H04W74/0833; H04W74/0841; H04W74/085
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
91 words
A transmission control method suitable in a radio
communication system which performs packet communications
by sharing a radio communication medium between plural
terminals and a radio station and employs a multiple
access system in which collision may occur, said method
comprising the steps of: making a terminal in a transmission mode during
use of a collision-based access system when
receiving a polling from said radio base
station, said terminal being changed to a
back-off state, thus being in a wait state,
because of collision of a signal transmitted
from said terminal.
Claim 2
Dependent Claim
68 words
The transmission control method defined in claim 1, wherein each of said terminals judges that a packet signal
transmitted from its terminal has collided when its
terminal receives access control information from said
radio base station after transmitting said packet signal
to said radio base station, said access control
information representing no reception, and changes to a
back-off state in which a different random time
transmission is suspended.
Claim 3
Dependent Claim
54 words
The transmission control method defined in claim 1 or 2, wherein said radio base station transmits a common polling
signal to all said terminals when a packet signal from
each of said terminals is not received, and sequentially
transmits polling signals to other terminals after a
packet is completely received from a specific terminal.
Claim 4
Dependent Claim
128 words
A transmission control method suitable in a radio
communication system which performs packet communications
by sharing a radio communication medium between plural
terminals and a radio station and adaptively employs a
multiple access system in which collision may occur and a
multiple access system in which collision does not occur,
said method comprising the steps of: detecting collision by means of said radio
station; changing said radio communication system to a
back-off state by transmitting said collision
signal when said multiple access system in
which collision may occur is changed to said
multiple access system in which collision
does not occur; and making said terminal in a transmission mode at a
polling receive time when said terminal in a
wait state has received polling from said
base station.
Claim 5
Dependent Claim
71 words
The transmission control method defined in claim 4, wherein each of said terminals judges that a packet signal
transmitted from itself has collided when receiving said
access control information from said radio base station,
said access control information representing that said
packet signal is not received, after transmission of said
packet signal to said radio station, and changes to a
back-off state in which a different random time
transmission is sustained.
Claim 6
Dependent Claim
137 words
A transmission control method suitable in a radio
communication system which performs packet communications
by sharing a radio communication medium between plural
terminals and a radio base station and employs a multiple
access system in which collision may occur in a reverse
link from said plural terminals to said radio base station
and which realizes transmission confirmation regarding a
forward link packet signal to be transmitted on a forward
link in response to a response signal from a terminal
being a destination of said forward link packet signal,
said method comprising the steps of: transmitting a collision signal after said radio
base station detects collision; and transmitting a response signal for transmission
confirmation at a polling receiving time when
a terminal changed to a back-off state and in
a wait state receives polling from said radio
station.
Claim 7
Dependent Claim
71 words
The transmission control method defined in claim 6,
wherein each of said terminals judges that a packet signal
transmitted from itself has collided when receiving said
access control information from said radio base station,
said access control information representing that said
packet signal is not received, after transmission of said
packet signal to said radio station, and changes to a
back-off state in which a different random time
transmission is sustained.
Claim 8
Dependent Claim
169 words
A transmission control method comprising the steps of, transmitting a first forward link message from a
radio base station to terminals; transmitting packet signals from said terminals
in response to said first forward link
message; transmitting a second forward link message from
said radio base station when said radio base
station does not receive said packet signals
due to collision of said packet signals; changing said terminals to a back-off state in
response to said second forward link message
to avoid re-collision; retrasnmitting a packet signal from a terminal
first recovered from said back-off state in
response to a third forward link message from
said radio base station; transmitting a fourth forward link message
containing access control information from
said radio base station when said radio base
station correctly receives said packet signal
from said first recovered terminal; and judging that said packet signal from said first
recovered terminal has been correctly
received by said radio base station when said
first recovered terminal receives said fourth
forward link message.
Claim 9
Dependent Claim
198 words
A transmission control method comprising the steps of, transmitting a first forward link message from a
radio base station to terminals; transmitting packet signals from said terminals
in response to said first forward link
message when said radio base station is in a
collision-system access mode; changing said radio base station from a
collision-system access mode to a non-collision-system
access mode when said radio
base station does not receive said packet
signals due to collision of said packet
signals, and then transmitting a second
forward link message from said radio base
station; changing said terminals to a back-off state in
response to said second forward link message
to avoid re-collision; retransmitting a packet signal from a terminal
first recovered from said back-off state
according to transmission invitation in
response to a third forward link message from
said radio base station; transmitting a fourth forward link message
containing polling information from said
radio base station to said first recovered
terminal when said radio base station
correctly receives said packet signal from
said first recovered terminal; and sequentially transmitting a fifth forward link
message from said radio base station when a
packet signal from said first recovered
terminal is transmitted.
Claim 10
Dependent Claim
216 words
A transmission control method comprising the steps of, transmitting packet signals from terminals in
response to a first forward link message from
a radio base station; transmitting a second forward link message from
said radio base station when said radio base
station does not receive said packet signals
due to collision of said packet signals; changing said terminals to a back-off state in
response to said second forward link message
to avoid re-collision; extracting forward link message for a terminal
in a back-off state from a third forward link
message transmitted from said radio base
station retransmitting a packet signal from a terminal
first recovered from said back-off state in
response to said third forward link message
from said radio base station; transmitting a fourth forward link message
containing access control information and
forward link message for first-recovered
terminal from said radio base station when
said radio base station correctly receives
said packet signal from said first recovered
terminal; extracting forward link message from said fourth
forward link message; transmitting a fifth forward link message
containing access control information and
forward link message from said radio base
station to confirm transmission of forward
link message; and transmitting a response packet signal from said
terminal in a back-off state in response to
said fifth forward link message.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.