US 7,889,699 B2 · Method for selecting serving node in multi-hop wireless mobile communication system

A method for selecting a serving node by a Mobile Station (MS) to provide the MS with a service in a multi-hop wireless mobile communication system where a plurality of nodes exist, the method comprising the steps of:

receiving from at least two nodes relay information;
and
calculating a time for unit data transmission/reception of each of the at least two nodes using the relay information, and selecting a node that requires a minimum time for the unit data transmission/reception as the serving node, based on the calculated time, when the multi-hop wireless communication system uses a variable time slot,
wherein if the MS is directly connected with a first node of the at least two nodes and the first node has a base station and a relay node as upper nodes, a time for the unit data transmission/reception of the first node is calculated based on
EST
cell
⁢
⁢
1
=
1
BW
cell
⁢
⁢
1
×
log
2
⁡
(
1
+
SINR
cell
⁢
⁢
1
)
+
1
BW
relay
⁢
⁢
1
×
Rate
relay
⁢
⁢
1
+
1
BW
relay
⁢
⁢
2
×
Rate
relay
⁢
⁢
2
where an Estimated Service Time (EST)cell indicates the time for the unit transmission/reception of the first node, BWcell1 indicates a bandwidth that is used by the first node, BWrelay1 indicates a bandwidth allocated to a first relay link between the base station and the relay node, BWrelay2 indicates a bandwidth allocated to a second relay link between the relay node and the first node, Raterelay1 indicates a transmission rate per unit bandwidth (bps/Hz) at which data can be transmitted through the first relay link, Raterelay2 indicates a transmission rate per unit bandwidth at which data can be transmitted through the second relay link, SINRcell1 indicates a signal-to-interference noise ratio that is determined by measuring a strength of a pilot signal transmitted from the first node.

53 more elements

A method for selecting a serving node in a multi-hop wireless mobile communication system where a base station, a Mobile Station (MS), and a relay node for relaying a signal of the MS exist, the method comprising the steps of:

transmitting, by the base station, a pilot signal of the base station to the MS and the relay node;
measuring, by the relay node, a channel quality between the base station and the relay node using the pilot signal of the base station;
transmitting, by the relay node, a pilot signal of the relay node and information of the measured channel quality to the MS;
calculating a time for unit data transmission/reception of each of the base station and the relay node using at least one of the pilot signal of the base station, the pilot signal of the relay node and the information of the measured channel quality;
and
selecting a node that requires a minimum time for the unit data transmission/reception as the serving node based on the calculated times, when the multi-hop wireless mobile communication system uses a variable time slot,
wherein if the MS is directly connected with the relay node and the relay node has the base station and a first node as upper nodes, a time for the unit data transmission/reception of the relay node is calculated based on
EST
cell
⁢
⁢
1
=
1
BW
cell
⁢
⁢
1
×
log
2
⁡
(
1
+
SINR
cell
⁢
⁢
1
)
+
1
BW
relay
⁢
⁢
1
×
Rate
relay
⁢
⁢
1
+
1
BW
relay
⁢
⁢
2
×
Rate
relay
⁢
⁢
2
where an Estimated Service Time (EST)cell1 indicates the time for the unit data transmission/reception of the relay node, BWcell1 indicates a bandwidth that is used by the relay node, BWrelay1 indicates a bandwidth allocated to a first relay link between the base station and the first node, BWrelay2 indicates a bandwidth allocated to a second relay link between the first node and the relay node, Raterelay1 indicates a transmission rate per unit bandwidth (bps/Hz) at which data can be transmitted through the first relay link, Raterelay2 indicates a transmission rate per unit bandwidth at which data can be transmitted through the second relay link, and SINRcell1 indicates a signal-to-interference noise ratio that is determined by measuring a strength of a pilot signal transmitted from the relay node.

56 more elements

A method for selecting a serving node in a multi-hop wireless mobile communication system where a base station, a Mobile Station (MS), and a relay node for relaying a signal of the MS exist, the method comprising the steps of:

transmitting, by the base station, a pilot signal of the base station to the MS and the relay node;
measuring, by the relay node, a channel quality between the base station and the relay node using the pilot signal of the base station;
transmitting, by the relay node, a pilot signal of the relay node and information of the measured channel quality to the MS;
calculating a time for unit data transmission/reception of each of the base station and the relay node using at least one of the pilot signal of the base station, the pilot signal of the relay node and the information of the measured channel quality;
and
selecting a node that requires a minimum time for the unit data transmission/reception as the serving node based on the calculated times, when the multi-hop wireless mobile communication system uses a variable time slot,
wherein if the base station transmits relay order information to the relay node and the MS is directly connected with the relay node and the relay node has the base station and a first node as upper nodes, a time for the unit data transmission/reception of the relay node is calculated based on
EST
cell
⁢
⁢
1
=
1
BW
cell
⁢
⁢
1
×
log
2
⁡
(
1
+
SINR
cell
⁢
⁢
1
)
+
relay_order
cell
⁢
⁢
1
BW
relay
⁢
⁢
2
×
Rate
relay
⁢
⁢
2
where an Estimated Service Time (EST)cell1 indicates the time for the unit data transmission/reception of the relay node, BWcell1 indicates a bandwidth that is used by the relay node, BWrelay2 indicates a bandwidth allocated to a relay link between the first node and the relay node, SINRcell1 indicates a signal-to-interference noise ratio that is determined by measuring a strength of a pilot signal transmitted from the relay node, Raterelay2 indicates a transmission rate per unit bandwidth (bps/Hz) at which a signal can be transmitted through the relay link, and relay_ordercell1 indicates a relay order of the relay node.

47 more elements

A method for selecting a serving node by a Mobile Station (MS) to provide the MS with a service in a multi-hop wireless mobile communication system where a plurality of nodes exist, the method comprising the steps of:

receiving from at least two nodes relay information;
calculating an amount of data that can be transmitted per unit time of each of the at least two nodes using the relay information;
and
selecting a node that can transmit a maximum amount of data per the unit time as the serving node, based on the calculated amount of data, when the multi-hop wireless mobile communication system uses a fixed time slot,
wherein if the MS is directly connected with a first node of the at least two nodes and the first node has a base station and a relay node as upper nodes, an amount of data per the unit time of the first node is calculated based on
ETHcell1=min(BWrelay1×Raterelay1×t1,BWrelay2×Raterelay2×t2,BWcell1×log2(1+SINRcell1)×t3)
where an Estimated data Throughput (ETH)cell1 indicates the amount of data per the unit time of the first node, BWcell1 indicates a bandwidth that is used by the first node, BWrelay1 indicates a bandwidth allocated to a first relay link between the base station and the relay node, BWrelay2 indicates a bandwidth allocated to a second relay link between the relay node and the first node, Raterelay1 indicates a transmission rate per unit bandwidth (bps/Hz) at which data can be transmitted through the first relay link, Raterelay2 indicates a transmission rate per unit bandwidth at which data can be transmitted through the second relay link, SINRcell1 indicates a signal-to-interference noise ratio that is determined by measuring a strength of a pilot signal transmitted from the first node, t1 indicates a length of a time slot of the first relay link, t2 indicates a length of a time slot of the second relay link, and t3 indicates a length of a time slot of a link between the first node and the MS.

4 more elements

A method for selecting a serving node in a multi-hop wireless mobile communication system where a base station, a Mobile Station (MS), and a relay node for relaying a signal of the MS exist, the method comprising the steps of

transmitting, by the base station, a pilot signal of the base station to the MS and the relay node;
measuring, by the relay node, a channel quality between the base station and the relay node using the pilot signal of the base station;
transmitting, by the relay node, a pilot signal of the relay node and information of the measured channel quality to the MS;
calculating an amount of data that can be transmitted per unit time of each of the base station and the relay node using at least one of the pilot signal of the base station, the pilot signal of the relay node and the information of the measured channel quality;
and
selecting a node capable of transmitting and receiving a maximum amount of data per the unit time among the base station and the relay station as the serving node based on the calculated amount of data, when the multi-hop wireless mobile communication system uses a fixed time slot,
wherein if the MS is directly connected with the relay node and the relay node has the base station and a first node as upper nodes, an amount of data per the unit time of the relay node is calculated based on
ETHcell1=min(BWrelay1×Raterelay1×t1,BWrelay2×Raterelay2×t2,BWcell1×log2(1+SINRcell1)×t3)
where an Estimated data Throughput (ETH)cell1 indicates the amount of data per the unit time of the relay node, BWcell1 indicates a bandwidth that is used by the relay node, BWrelay1 indicates a bandwidth allocated to a first relay link between the base station and the first node, BWrelay2 indicates a bandwidth allocated to a second relay link between the first node and the relay node, Raterelay1 indicates a transmission rate per unit bandwidth (bps/Hz) at which data can be transmitted through the first relay link, Raterelay2 indicates a transmission rate per unit bandwidth at which data can be transmitted through the second relay link, SINRcell1 indicates a signal-to-interference noise ratio that is determined by measuring a strength of a pilot signal transmitted from the relay node, t1 indicates a length of a time slot of the first relay link, t2 indicates a length of a time slot of the second relay link, and t3 indicates a length of a time slot of a link between the relay node and the MS.

6 more elements

A method for selecting a serving node in a multi-hop wireless mobile communication system where a base station, a Mobile Station (MS), and a relay node for relaying a signal of the MS exist, the method comprising the steps of:

transmitting, by the base station, a pilot signal of the base station to the MS and the relay node;
measuring, by the relay node, a channel quality between the base station and the relay node using the pilot signal of the base station;
transmitting, by the relay node, a pilot signal of the relay node and information of the measured channel quality to the MS;
calculating an amount of data that can be transmitted per unit time of each of the base station and the relay node using at least one of the pilot signal of the base station, the pilot signal of the relay node and the information of the measured channel quality;
and
selecting a node capable of transmitting and receiving a maximum amount of data per the unit time among the base station and the relay station as the serving node based on the calculated the amount of the data, when the multi-hop wireless mobile communication system uses a fixed time slot,
wherein if the base station transmits relay order information to the relay node and the MS is directly connected with the relay node and the relay node has the base station and a second node as upper nodes, an amount of the data per the unit time of the relay node is calculated based on
ETH
cell
⁢
⁢
1
=
min
⁡
(
BW
relay
⁢
⁢
2
×
Rate
relay
⁢
⁢
2
×
t
2
relay_order
cell
⁢
⁢
1
,
BW
cell
⁢
⁢
1
×
log
2
⁡
(
1
+
SINR
cell
⁢
⁢
1
)
×
t
3
)
where an Estimated data Throughput (ETH)cell1 indicates the amount of data per the unit time of the relay node, BWcell1 indicates a bandwidth that is used by the relay node, BWrelay2 indicates a bandwidth allocated to a relay link between the second node and the relay node, SINRcell1 indicates a signal-to-interference noise ratio that is determined by measuring a strength of a pilot signal transmitted from the relay node, t2 indicates a length of a time slot of the relay link, t3 indicates a length of a time slot of a link between the relay node and the MS, Raterelay2 indicates a transmission rate per unit bandwidth (bps/Hz) at which a signal can be transmitted through the relay link, and relay_ordercell1 indicates a relay order of the relay node.

56 more elements

Method for selecting serving node in multi-hop wireless mobile communication system

Life of this patent

Method for selecting serving node in multi-hop wireless mobile communication system

Life of this patent

Abstract

Claims24