CA2915213C - A method of controlling uplink transmission power in a communications network - Google Patents
A method of controlling uplink transmission power in a communications network Download PDFInfo
- Publication number
- CA2915213C CA2915213C CA2915213A CA2915213A CA2915213C CA 2915213 C CA2915213 C CA 2915213C CA 2915213 A CA2915213 A CA 2915213A CA 2915213 A CA2915213 A CA 2915213A CA 2915213 C CA2915213 C CA 2915213C
- Authority
- CA
- Canada
- Prior art keywords
- mobile station
- power
- power level
- transmission
- network node
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/06—TPC algorithms
- H04W52/14—Separate analysis of uplink or downlink
- H04W52/146—Uplink power control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/06—TPC algorithms
- H04W52/10—Open loop power control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/34—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
- H04W52/343—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading taking into account loading or congestion level
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
- H04W52/367—Power values between minimum and maximum limits, e.g. dynamic range
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/38—TPC being performed in particular situations
- H04W52/50—TPC being performed in particular situations at the moment of starting communication in a multiple access environment
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
A method of controlling uplink transmission power in a communications network including a network node and a mobile station is disclosed, wherein the mobile station is allowed to autonomously reduce its transmission power on a transmission channel until the network node signals a mobile station power level different from a predetermined power level to the mobile station, and the network node controls the transmission power of the mobile station when said mobile station power level is signalled to the mobile station.
Description
A METHOD OF CONTROLLING UPLINK TRANSMISSION POWER IN A
COMMUNICATIONS NETWORK
FIELD OF THE INVENTION
The invention generally relates to a method of controlling uplink transmission power in a communications network.
BACKGROUND OF THE INVENTION
In the GSM standard specifying call set up procedures in GSM/EDGE communications networks, it is currently specified that a mobile station shall use maximum transmit power on the random access channel (RACH) in the uplink. By maximum power, it is meant the maximum power supported by the mobile station or the maximum allowed by system information parame-ters for a particular cell in the network, whichever is lower.
Maximum power is also normally used as the power level during the initial period of the stand alone dedicated control chan-nel (SDCCH) and traffic channel (TCH) in/-signalling only mode. This is while the network performs an averaging of up-link measurements to obtain a sufficiently reliable estimate of the condition of the channel (averaging is network con-trolled and normally takes a few slow associated control channel (SACCH) periods) and also while the first power com-mand to correct the initial power level is signalled to the mobile (signalling a power command from the base station to the mobile station takes one SACCH period).
COMMUNICATIONS NETWORK
FIELD OF THE INVENTION
The invention generally relates to a method of controlling uplink transmission power in a communications network.
BACKGROUND OF THE INVENTION
In the GSM standard specifying call set up procedures in GSM/EDGE communications networks, it is currently specified that a mobile station shall use maximum transmit power on the random access channel (RACH) in the uplink. By maximum power, it is meant the maximum power supported by the mobile station or the maximum allowed by system information parame-ters for a particular cell in the network, whichever is lower.
Maximum power is also normally used as the power level during the initial period of the stand alone dedicated control chan-nel (SDCCH) and traffic channel (TCH) in/-signalling only mode. This is while the network performs an averaging of up-link measurements to obtain a sufficiently reliable estimate of the condition of the channel (averaging is network con-trolled and normally takes a few slow associated control channel (SACCH) periods) and also while the first power com-mand to correct the initial power level is signalled to the mobile (signalling a power command from the base station to the mobile station takes one SACCH period).
2 However, unnecessary use of maximum power can cause unwanted interference in the cell and may lead to blocking or desensi-tisation of the base station receiver. It can also prevent the establishment of a call when the battery of the mobile station is low (or cold).
A method of reducing uplink transmission power has been pro-posed, which allows the mobile station to reduce its trans-mission power on the RACH when the received level average (RLA) exceeds a pre-defined threshold set by the standard.
RLA is measured by the mobile station on each carrier on the downlink and can be used to estimate path loss in the uplink (and hence the received uplink power).
It has also been proposed to extend the method of reducing uplink transmission power to the SDCCH or TCH (signalling only mode) channels by leaving out any optional uplink power commands that may be used by the network to signal the ini-tial uplink power to use on these channels.
However, in addition to the optional uplink power commands are uplink power commands which are sent at regular intervals on the SACCH. If the mobile station ignores these uplink cower commands while it is using the method of reducing up-link transmission power then the network will have completely lost control of the uplink power on these channels during this time. The mobile station may autonomously apply power reduction due to the RLA exceeding the threshold but the net-work may want the mobile station to increase its power due to excessively high interference, for example.
A method of reducing uplink transmission power has been pro-posed, which allows the mobile station to reduce its trans-mission power on the RACH when the received level average (RLA) exceeds a pre-defined threshold set by the standard.
RLA is measured by the mobile station on each carrier on the downlink and can be used to estimate path loss in the uplink (and hence the received uplink power).
It has also been proposed to extend the method of reducing uplink transmission power to the SDCCH or TCH (signalling only mode) channels by leaving out any optional uplink power commands that may be used by the network to signal the ini-tial uplink power to use on these channels.
However, in addition to the optional uplink power commands are uplink power commands which are sent at regular intervals on the SACCH. If the mobile station ignores these uplink cower commands while it is using the method of reducing up-link transmission power then the network will have completely lost control of the uplink power on these channels during this time. The mobile station may autonomously apply power reduction due to the RLA exceeding the threshold but the net-work may want the mobile station to increase its power due to excessively high interference, for example.
3 SUMMARY OF THE INVENTION
Accordingly, the invention provides a method of controlling uplink transmission power in a communications network including a network node and a mobile station, wherein the mobile station is allowed to autonomously reduce its transmission power on a transmission channel until the network node signals a mobile station power level different from a predetermined power level to the mobile station, and the network node controls the transmission power of the mobile station when said mobile station power level is signalled to the mobile station.
The mobile station is permitted to autonomously reduce its transmission power as long as the network node signals a predetermined power level to the mobile station. However, if the mobile station is using autonomous power reduction and the network node signals an allowed mobile station power level to the mobile station that is different from the prede-termined power level, the mobile station ceases to autono-mously reduce its transmission power. The network node then takes over control of the transmission power of the mobile station.
Since the mobile station may reduce its transmission power autonomously, minimal changes or no changes at all are re-quired to be made to the base station subsystem (BSS) in or-der to implement the method according to the invention, mak-ing it low cost and simple to implement.
Optionally, a mobile shall not be allowed to autonomously re-duce its transmission power on the same transmission channel again once the network node has taken over control of the transmission power of the mobile station by signalling an al-
Accordingly, the invention provides a method of controlling uplink transmission power in a communications network including a network node and a mobile station, wherein the mobile station is allowed to autonomously reduce its transmission power on a transmission channel until the network node signals a mobile station power level different from a predetermined power level to the mobile station, and the network node controls the transmission power of the mobile station when said mobile station power level is signalled to the mobile station.
The mobile station is permitted to autonomously reduce its transmission power as long as the network node signals a predetermined power level to the mobile station. However, if the mobile station is using autonomous power reduction and the network node signals an allowed mobile station power level to the mobile station that is different from the prede-termined power level, the mobile station ceases to autono-mously reduce its transmission power. The network node then takes over control of the transmission power of the mobile station.
Since the mobile station may reduce its transmission power autonomously, minimal changes or no changes at all are re-quired to be made to the base station subsystem (BSS) in or-der to implement the method according to the invention, mak-ing it low cost and simple to implement.
Optionally, a mobile shall not be allowed to autonomously re-duce its transmission power on the same transmission channel again once the network node has taken over control of the transmission power of the mobile station by signalling an al-
4 lowed mobile station power level to the mobile station that is different from the predetermined power level. If the net-work node has taken over control of the transmission power level of the mobile station on a particular channel, the mo-bile station can be prevented from autonomously reducing its transmission power on the same channel again during a par-ticular call. The mobile station can be permitted to autono-mously reduce its transmission power when the network node signals the predetermined power level to the mobile station.
Preferably the network node signals to the mobile station the transmission power it should use when the network node sig-nals the mobile station power level different to the prede-termined power level.
The predetermined power level can be the initial power level that the mobile station shall use on the transmission chan-nel. This is often the maximum power level allowed by a mo-bile station in a cell of the network in which the network node is located. The network node can signal to the mobile station the predetermined power level plus or minus one power level when it wants the mobile station to use the predeter-mined power level.
In one embodiment of the invention, the network node detects the power level of the mobile station. The network node may determine when the mobile station is autonomously reducing its transmission power on the transmission channel from a re-ported actual mobile station power level. The network node may then modify its power control procedures so that maximum Power plus or minus one power level is signalled instead of maximum power. If the network node has taken over control of the transmission power level of the mobile station on a par-ticular channel, it will be able to signal maximum power.
The transmission channel may be a stand alone dedicated channel (SDCCH) or a traffic channel (TCH) in signalling only mode.
Preferably, the mobile station is allowed to autonomously reduce its transmission power at the beginning of transmission on the
Preferably the network node signals to the mobile station the transmission power it should use when the network node sig-nals the mobile station power level different to the prede-termined power level.
The predetermined power level can be the initial power level that the mobile station shall use on the transmission chan-nel. This is often the maximum power level allowed by a mo-bile station in a cell of the network in which the network node is located. The network node can signal to the mobile station the predetermined power level plus or minus one power level when it wants the mobile station to use the predeter-mined power level.
In one embodiment of the invention, the network node detects the power level of the mobile station. The network node may determine when the mobile station is autonomously reducing its transmission power on the transmission channel from a re-ported actual mobile station power level. The network node may then modify its power control procedures so that maximum Power plus or minus one power level is signalled instead of maximum power. If the network node has taken over control of the transmission power level of the mobile station on a par-ticular channel, it will be able to signal maximum power.
The transmission channel may be a stand alone dedicated channel (SDCCH) or a traffic channel (TCH) in signalling only mode.
Preferably, the mobile station is allowed to autonomously reduce its transmission power at the beginning of transmission on the
5 stand alone dedicated channel or on the traffic channel in signalling only mode.
When the mobile station power level different from the predetermmed power level is signalled to the mobile station, and the network node has taken control of the mobile station transmission power, the network node may keep control of the mobile station transmission power for the duration of transmission on the channel.
The network node may indicate to the mobile station that the network supports the mobile station autonomously reducing its transmission power.
This can be achieved, for example, by providing an indicator bit on the broadcast channel and is advantageous in cases where autonomous reduction of the mo- bile station transmission power would have an impact on leg- acy networks (e.g. legacy power control algorithms).
The invention also provides a mobile station comprising a receiver and a power control unit, wherein the power control unit is configured in operation to autonomously reduce the transmission power of the mobile station on a transmission channel until a signal indicating a mobile station power level different from a predetermined power level is received by the receiver.
When the mobile station power level different from the predetermmed power level is signalled to the mobile station, and the network node has taken control of the mobile station transmission power, the network node may keep control of the mobile station transmission power for the duration of transmission on the channel.
The network node may indicate to the mobile station that the network supports the mobile station autonomously reducing its transmission power.
This can be achieved, for example, by providing an indicator bit on the broadcast channel and is advantageous in cases where autonomous reduction of the mo- bile station transmission power would have an impact on leg- acy networks (e.g. legacy power control algorithms).
The invention also provides a mobile station comprising a receiver and a power control unit, wherein the power control unit is configured in operation to autonomously reduce the transmission power of the mobile station on a transmission channel until a signal indicating a mobile station power level different from a predetermined power level is received by the receiver.
6 The invention further provides a mobile station comprising a receiver and a power control unit, wherein the power control unit is configured in operation to autonomously reduce the transmission power of the mobile station on a transmission channel until a signal indicating a mobile station power level different from a predetermined power level is received by the receiver.
The power control unit of the mobile station is permitted to autonomously reduce the mobile station transmission power as long as the receiver of the mobile station receives a signal indicating a predetermined allowed power level. When the receiver receives a signal indicating a power level different to the predetermined power level, and if the power control unit is currently using autonomous power reduction, the power control unit stops autonomously reducing the transmission power of the mobile station.
Preferably, the power control unit is configured to adjust the transmission power based on a network power command received by the receiver when the signal indicating said mobile station power level is received by the receiver. When the receiver receives the signal indicating a power level different to the predetermined power level, the network takes over control of the mobile station transmission power so that, instead of autonomously reducing the transmission power, the power control unit adjusts the transmission power of the mobile station based on a command received from the network by the receiver.
The power control unit of the mobile station is permitted to autonomously reduce the mobile station transmission power as long as the receiver of the mobile station receives a signal indicating a predetermined allowed power level. When the receiver receives a signal indicating a power level different to the predetermined power level, and if the power control unit is currently using autonomous power reduction, the power control unit stops autonomously reducing the transmission power of the mobile station.
Preferably, the power control unit is configured to adjust the transmission power based on a network power command received by the receiver when the signal indicating said mobile station power level is received by the receiver. When the receiver receives the signal indicating a power level different to the predetermined power level, the network takes over control of the mobile station transmission power so that, instead of autonomously reducing the transmission power, the power control unit adjusts the transmission power of the mobile station based on a command received from the network by the receiver.
7 The invention will now be described, by way of example only, with reference to specific embodiments, and to the accompany-ing drawings, in which:
BRIEF DESCRIPTION OF THE DRAWINGS
- Figure 1 is a simplified schematic diagram of a communi-cations network for implementing the method according to an embodiment of the invention;
- Figure 2 is a simplified schematic diagram of a network node of a communications network for implementing the method according to an embodiment of the invention; and - Figure 3 is a simplified schematic diagram of a mobile station of a communications network for implementing the method according to an embodiment of the invention.
DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS
Figure 1 shows a radio communications network, which includes a network node, in this case a base station N, located in a cell of the network. A mobile station UE, for example a mo-bile telephone or PDA, can communicate via the base station N.
The base station N and the mobile station UE are shown sche-matically in more detail in Figures 2 and 3, respectively.
The base station N includes a transmitter T for transmitting
BRIEF DESCRIPTION OF THE DRAWINGS
- Figure 1 is a simplified schematic diagram of a communi-cations network for implementing the method according to an embodiment of the invention;
- Figure 2 is a simplified schematic diagram of a network node of a communications network for implementing the method according to an embodiment of the invention; and - Figure 3 is a simplified schematic diagram of a mobile station of a communications network for implementing the method according to an embodiment of the invention.
DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS
Figure 1 shows a radio communications network, which includes a network node, in this case a base station N, located in a cell of the network. A mobile station UE, for example a mo-bile telephone or PDA, can communicate via the base station N.
The base station N and the mobile station UE are shown sche-matically in more detail in Figures 2 and 3, respectively.
The base station N includes a transmitter T for transmitting
8 data to the rest of the network and a controller C coupled to the transmitter T. A
receiver R is provided for receiving data from the mobile station UE and other network components, such as other mobile stations, and is coupled to a detector, which detects the transmission power level being used by the mobile station UE. The mobile station UE includes a trans-mitter TM and a receiver FM, both coupled to a power control unit PCU. For clarity and simplicity, Figures 1-3 only show the components required for the invention.
In operation, the transmitter T in the base station N broad-casts to the mobile station UE on the BCCH channel the maxi-mum transmission power level allowed in the cell of the net-work where it is located.
Furthermore, the base station N
indicates, by means of an indicator bit on the BCCH channel, that the network supports the mobile station UE autonomously reducing its transmission power level. While the receiver RM
of the mobile station UE is receiving the broadcast from the base station N that the cell maximum transmission power is allowed, the power control unit PCU of the mobile station UE
starts to autonomously reduce the transmission power of the mobile station UE at the beginning of transmission by the mo-bile station UE on a transmission channel (e.g. SDCCH or TCH
in signalling only mode) being used by the transmitter TM for transmitting data from the mobile station UE. The power con-trol unit PCU of the mobile station UE continues to autono-mously reduce the transmission power of the mobile station UE
while the network is broadcasting (via the base station N) the maximum allowed cell transmission power. The network will permit the UE to autonomously reduce its transmission cower as long as the maximum cell transmission power is being broadcast.
receiver R is provided for receiving data from the mobile station UE and other network components, such as other mobile stations, and is coupled to a detector, which detects the transmission power level being used by the mobile station UE. The mobile station UE includes a trans-mitter TM and a receiver FM, both coupled to a power control unit PCU. For clarity and simplicity, Figures 1-3 only show the components required for the invention.
In operation, the transmitter T in the base station N broad-casts to the mobile station UE on the BCCH channel the maxi-mum transmission power level allowed in the cell of the net-work where it is located.
Furthermore, the base station N
indicates, by means of an indicator bit on the BCCH channel, that the network supports the mobile station UE autonomously reducing its transmission power level. While the receiver RM
of the mobile station UE is receiving the broadcast from the base station N that the cell maximum transmission power is allowed, the power control unit PCU of the mobile station UE
starts to autonomously reduce the transmission power of the mobile station UE at the beginning of transmission by the mo-bile station UE on a transmission channel (e.g. SDCCH or TCH
in signalling only mode) being used by the transmitter TM for transmitting data from the mobile station UE. The power con-trol unit PCU of the mobile station UE continues to autono-mously reduce the transmission power of the mobile station UE
while the network is broadcasting (via the base station N) the maximum allowed cell transmission power. The network will permit the UE to autonomously reduce its transmission cower as long as the maximum cell transmission power is being broadcast.
9 If, however, the allowed cell transmission power is required to change, for example due to excessive interference in the cell, the base station N broadcasts a signal containing a mo-bile station transmit power level that is different from the maximum allowed in the cell. This signal is received at the receiver RM of the mobile station UE, which stops the power control unit PCU of the mobile station UE from autonomously reducing the transmission power of the mobile station UE on the transmission channel being used. The controller C of the base station N then controls the base station transmitter T
to transmit a power command signal, which is received at the receiver RM of the mobile station UE and controls the power control unit PCU to adjust the transmission power of the mo-bile station UE. Control of the transmission power of the mobile station UE on the transmission channel is then kept by the network for the rest of the duration of the transmission channel and the network prevents the mobile station UE from autonomously reducing its transmission power level on that channel again.
In an alternative embodiment, the network can modify its power control procedures so that maximum cell transmission power plus or minus one power level is signalled by the base station N instead of maximum power when autonomous power re-duction is being used by the mobile station UE. In this case, the detector D in the base station N detects the actual transmission power being used by the mobile station UE on the transmission channel so can determine if autonomous power re-duction is being used by the mobile station UE. If the de-tector D detects that autonomous power reduction is being used by the mobile stat-ion UE, the controller C can then con-trol the transmitter T of the base station N to transmit the cell maximum allowed power plus or minus one power level to the mobile station UE.
If the network needs to signal the maximum transmission power allowed in a particular cell, the base station N may command the mobile station UE, by a signal on the BCCH channel to use maximum transmission power minus one power control level and 5 subsequently increase this to a maximum, once the network assumes control of uplink power.
Signalling of the power commands from the base station N to the mobile station UE may be achieved by setting an indicator bit on the BCCH channel, for example.
Alternatively, the base station N may command the mobile station UE to use the maximum transmission power allowed in the cell plus one power control level. For example, if the cell maximum transmission power was set at 2W for a GSM 900 network, then at one power control level higher the mobile station UE would immediately follow a transmission power of 2W. If the cell maximum power was set to be lower than this, then the network would have to revert to the actual cell maximum power after some time.
Although the invention has been described hereinabove with reference to specific embodiments, it is not limited to these embodiments and no doubt further alternatives will occur to the skilled person that lie within the claims appended hereto.
For example, the control functionality of the base station may be located in a separate radio network controller (RNC) coupled to the base station.
to transmit a power command signal, which is received at the receiver RM of the mobile station UE and controls the power control unit PCU to adjust the transmission power of the mo-bile station UE. Control of the transmission power of the mobile station UE on the transmission channel is then kept by the network for the rest of the duration of the transmission channel and the network prevents the mobile station UE from autonomously reducing its transmission power level on that channel again.
In an alternative embodiment, the network can modify its power control procedures so that maximum cell transmission power plus or minus one power level is signalled by the base station N instead of maximum power when autonomous power re-duction is being used by the mobile station UE. In this case, the detector D in the base station N detects the actual transmission power being used by the mobile station UE on the transmission channel so can determine if autonomous power re-duction is being used by the mobile station UE. If the de-tector D detects that autonomous power reduction is being used by the mobile stat-ion UE, the controller C can then con-trol the transmitter T of the base station N to transmit the cell maximum allowed power plus or minus one power level to the mobile station UE.
If the network needs to signal the maximum transmission power allowed in a particular cell, the base station N may command the mobile station UE, by a signal on the BCCH channel to use maximum transmission power minus one power control level and 5 subsequently increase this to a maximum, once the network assumes control of uplink power.
Signalling of the power commands from the base station N to the mobile station UE may be achieved by setting an indicator bit on the BCCH channel, for example.
Alternatively, the base station N may command the mobile station UE to use the maximum transmission power allowed in the cell plus one power control level. For example, if the cell maximum transmission power was set at 2W for a GSM 900 network, then at one power control level higher the mobile station UE would immediately follow a transmission power of 2W. If the cell maximum power was set to be lower than this, then the network would have to revert to the actual cell maximum power after some time.
Although the invention has been described hereinabove with reference to specific embodiments, it is not limited to these embodiments and no doubt further alternatives will occur to the skilled person that lie within the claims appended hereto.
For example, the control functionality of the base station may be located in a separate radio network controller (RNC) coupled to the base station.
Claims (12)
1. A method of controlling uplink transmission power in a communications network including a network node and a mobile station, wherein the mobile station is allowed to autonomously reduce its transmission power on a transmission channel until the network node signals a mobile station power level different from a predetermined power level to the mobile station, and the network node controls the transmission power of the mobile station when said mobile station power level is signalled to the mobile station.
2. The method according to claim 1, wherein the network node signals to the mobile station the transmission power it should use when the network node signals said mobile station power level.
3. The method according to claim 1 or 2, wherein the predetermined power level is an initial power level that shall be used by the mobile station on the transmission channel.
4. The method according to claim 3, wherein the initial power level is the maximum power level that is allowed in a cell of the network in which the network node is located.
5. The method according to any one of claims 1 to 4, wherein the network node signals to the mobile station the predetermined power level plus or minus one power level when the network node wishes the mobile station to use the predetermined power level.
6. The method according to any one of claims 1 to 5, wherein the network node detects the power level of the mobile station.
7. The method according to any one of claims 1 to 6, wherein the transmission channel is a stand alone dedicated channel or a traffic channel in signalling only mode.
8. The method according to claim 7, wherein the mobile station is allowed to autonomously reduce its transmission power at the beginning of transmission on the stand alone dedicated channel or on the traffic channel in signalling only mode.
9. The method according to any one of claims 1 to 8, wherein when the mobile station power level different from the predetermined power level is signalled to the mobile station, and the network node has taken control of the mobile station transmission power, the network node keeps control of the mobile station transmission power for the duration of transmission on the channel.
10. The method according to any one of claims 1 to 8, wherein the network node indicates to the mobile station that the network supports the mobile station autonomously reducing its transmission power.
11. A mobile station comprising a receiver and a power control unit, wherein the power control unit is configured in operation to autonomously reduce the transmission power of the mobile station on a transmission channel until a signal indicating a mobile station power level different from a predetermined power level is received by the receiver.
12. The mobile station according to claim 11, wherein the power control unit is configured to adjust the transmission power based on a network power command received by the receiver when the signal indicating said mobile station power level is received by the receiver.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EPPCT/EP2009/060946 | 2009-08-25 | ||
| EP2009060946 | 2009-08-25 | ||
| CA2805514A CA2805514A1 (en) | 2009-08-25 | 2010-08-17 | A method of controlling uplink transmission power in a communications network |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2805514A Division CA2805514A1 (en) | 2009-08-25 | 2010-08-17 | A method of controlling uplink transmission power in a communications network |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2915213A1 CA2915213A1 (en) | 2011-03-03 |
| CA2915213C true CA2915213C (en) | 2017-08-15 |
Family
ID=43383503
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2805514A Abandoned CA2805514A1 (en) | 2009-08-25 | 2010-08-17 | A method of controlling uplink transmission power in a communications network |
| CA2915213A Expired - Fee Related CA2915213C (en) | 2009-08-25 | 2010-08-17 | A method of controlling uplink transmission power in a communications network |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2805514A Abandoned CA2805514A1 (en) | 2009-08-25 | 2010-08-17 | A method of controlling uplink transmission power in a communications network |
Country Status (2)
| Country | Link |
|---|---|
| CA (2) | CA2805514A1 (en) |
| WO (1) | WO2011023595A2 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1198419C (en) * | 2003-01-16 | 2005-04-20 | 大唐移动通信设备有限公司 | Control method based on power of down doing guidance time slot |
| JP2007195076A (en) * | 2006-01-20 | 2007-08-02 | Nec Corp | Radio communication system, and transmission power control method and device thereof |
| JP5247034B2 (en) * | 2007-01-09 | 2013-07-24 | 株式会社エヌ・ティ・ティ・ドコモ | Base station apparatus, user apparatus and transmission power determination method used in mobile communication system |
-
2010
- 2010-08-17 CA CA2805514A patent/CA2805514A1/en not_active Abandoned
- 2010-08-17 WO PCT/EP2010/061970 patent/WO2011023595A2/en active Application Filing
- 2010-08-17 CA CA2915213A patent/CA2915213C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011023595A3 (en) | 2011-04-21 |
| CA2915213A1 (en) | 2011-03-03 |
| CA2805514A1 (en) | 2011-03-03 |
| WO2011023595A2 (en) | 2011-03-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108605362B (en) | System and method for determining resource selection techniques | |
| US10098137B2 (en) | Unlicensed frequency band with licensed frequency band timing | |
| EP2770786B1 (en) | D2d power control method, user equipment, base station and communication system | |
| KR101184497B1 (en) | Load control in shared medium many-to-one communication systems | |
| JP4879054B2 (en) | User apparatus, base station apparatus and method used in mobile communication system | |
| EP2276295B1 (en) | Method, system, and apparatus for determining uplink transmission power in time division duplex system | |
| US8086259B2 (en) | Radio communication apparatus, radio communication system and radio communication method | |
| EP3095282B1 (en) | Method of adjusting a transmit power for device-to-device communication, user equipment, group head of a device-to-device communication group, and communication system | |
| US10362546B2 (en) | Preamble synchronization signal in unlicensed frequency band | |
| RU2010109404A (en) | METHOD AND DEVICE FOR REDUCING THE COSTS OF RADIO RESOURCES ASSOCIATED WITH INTERRUPTED DATA TRAFFIC | |
| CN107046717B (en) | Method and equipment for determining channel perception threshold in uplink channel access | |
| US20150065118A1 (en) | Method for operating a mobile station | |
| US20160073360A1 (en) | Radio communication system and mobile terminal device | |
| EP4037199A1 (en) | Method and apparatus for transmitting information about channel state in nr v2x | |
| EP2247147B1 (en) | Pilot channel transmission in a cellular communication network | |
| US11950276B2 (en) | Transmission of priority indicator between ENBS in a licensed frequency band to manage communication resources in an unlicensed frequency band | |
| EP2642785B1 (en) | Methods and devices for data measurement | |
| US20150141070A1 (en) | Mobile station and method of determining transmission power | |
| US20100304778A1 (en) | Method and communication system for calculating a rise-over-thermal (rot) threshold value | |
| US8437704B2 (en) | System and method for resuming power control after interruption | |
| CA2915213C (en) | A method of controlling uplink transmission power in a communications network | |
| CN110167127B (en) | Communication method and device | |
| CN104812029A (en) | Power control method in LTE system and user equipment UE | |
| CN112188602A (en) | Power control method and communication equipment | |
| WO2022240681A1 (en) | Prioritization of multiple discovery resource types |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |
Effective date: 20151214 |
|
| MKLA | Lapsed |
Effective date: 20190819 |