CA2436042A1 - Adaptive pilot/traffic channel power control for 3gpp wcdma - Google Patents
Adaptive pilot/traffic channel power control for 3gpp wcdma Download PDFInfo
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- CA2436042A1 CA2436042A1 CA002436042A CA2436042A CA2436042A1 CA 2436042 A1 CA2436042 A1 CA 2436042A1 CA 002436042 A CA002436042 A CA 002436042A CA 2436042 A CA2436042 A CA 2436042A CA 2436042 A1 CA2436042 A1 CA 2436042A1
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- power ratio
- reference power
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- power
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- 238000000034 method Methods 0.000 claims abstract description 27
- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 238000004891 communication Methods 0.000 claims description 6
- 238000001228 spectrum Methods 0.000 description 8
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000010267 cellular communication Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000011664 signaling Effects 0.000 description 2
- 206010041235 Snoring Diseases 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/30—Transmission power control [TPC] using constraints in the total amount of available transmission power
- H04W52/32—TPC of broadcast or control channels
- H04W52/325—Power control of control or pilot channels
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/06—TPC algorithms
- H04W52/16—Deriving transmission power values from another channel
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/18—TPC being performed according to specific parameters
- H04W52/28—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non-transmission
- H04W52/288—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non-transmission taking into account the usage mode, e.g. hands-free, data transmission or telephone
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [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
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The present invention is a method (figure 1) and system to determine the gain factors for the uplink and downlink Dedicated Physical Control Channel (DPCC) and Dedicated Physical Data Channel (DPDC). The method consists of determining new data rate (104) for transmission; providing corresponding system and radio channel parameters (106); determining reference power ratio P1 (108); and, normalizing the reference power ratio (110).
Description
WCDMA
FIELD OF THE INVENTION
This invention relates to the field of wireless digital communications, and more particularly to gain factors.
BACKGROUND OF THE INVENTION
Wireless communications facilitates the delivery of information between the transmitter and the receiver without a physical wired connection. Such advantage translates to the freedom of mobility for the users and to the savings of wiring nuisance for the users. However, spectrum has become scarce resource as the usage of wireless communications for various applications becomes more popular. Therefore the efficiency of using spectrum presents challenges for the wireless industry. In order to maximize efficient spectrum utilization, various multiple access methods have been proposed to achieve the goal.
First generation cellular communications systems, Advanced Mobile Phone Services (AMPS) employed the Frequency Division Multiple Access (FDMA) method and provided voice communication services in the early days. Second generation cellular communications systems improved the spectrum efficiency by uSlllg more digital processing of signals and employed Time Division Multiple Access (TDMA) method in GSM and IS-136 systems and Code Division Multiple Access (CDMA) method in IS-systems. While second generation systems typically provide two to five times voice capacity over the first generation systems, data capabilities of second-generation systems are very limited.
FIELD OF THE INVENTION
This invention relates to the field of wireless digital communications, and more particularly to gain factors.
BACKGROUND OF THE INVENTION
Wireless communications facilitates the delivery of information between the transmitter and the receiver without a physical wired connection. Such advantage translates to the freedom of mobility for the users and to the savings of wiring nuisance for the users. However, spectrum has become scarce resource as the usage of wireless communications for various applications becomes more popular. Therefore the efficiency of using spectrum presents challenges for the wireless industry. In order to maximize efficient spectrum utilization, various multiple access methods have been proposed to achieve the goal.
First generation cellular communications systems, Advanced Mobile Phone Services (AMPS) employed the Frequency Division Multiple Access (FDMA) method and provided voice communication services in the early days. Second generation cellular communications systems improved the spectrum efficiency by uSlllg more digital processing of signals and employed Time Division Multiple Access (TDMA) method in GSM and IS-136 systems and Code Division Multiple Access (CDMA) method in IS-systems. While second generation systems typically provide two to five times voice capacity over the first generation systems, data capabilities of second-generation systems are very limited.
Recent rapid commercial development of Internet and multimedia applications has created a strong demand for wireless cellular systems capable of providing sufficient bandwidth. In addition, further improvement of voice capacity in spectrum efficiency is in great demand as the spectrum allocated for service is very limited. This scarcity results in high licensing fees for the available spectrum.
Therefore there is a strong need to improve the system capacity and spectrum efficiency for wireless communication systems.
SUMMARY OF THE INVENTION
The present invention is a method and system to determine the gain factors for the uplinlc and downlink Dedicated Physical Control Channel (DPCC) and Dedicated Physical Data Channel (DPDC).
BRIEF DESCRIPTION OF THE DRAWINGS
A snore complete understanding of the present invention may be obtained from consideration of the following description in conjunction with the drawing in which Fig.
1 is a functional block diagram.
DETAILED DESCRIPTION OF AN EXEMPLARY EMBODIMENT
The present invention is equally well suited for both uplink of WCDMA as well as other similar systems like CDMA2000. One feature of the present invention is a method and system to determine the gain factors for the uplinlc and downlink DPDCH
and DPCCH. This method and system is equally well suited for Physical Random Access Channel (PRACH) message part.
Therefore there is a strong need to improve the system capacity and spectrum efficiency for wireless communication systems.
SUMMARY OF THE INVENTION
The present invention is a method and system to determine the gain factors for the uplinlc and downlink Dedicated Physical Control Channel (DPCC) and Dedicated Physical Data Channel (DPDC).
BRIEF DESCRIPTION OF THE DRAWINGS
A snore complete understanding of the present invention may be obtained from consideration of the following description in conjunction with the drawing in which Fig.
1 is a functional block diagram.
DETAILED DESCRIPTION OF AN EXEMPLARY EMBODIMENT
The present invention is equally well suited for both uplink of WCDMA as well as other similar systems like CDMA2000. One feature of the present invention is a method and system to determine the gain factors for the uplinlc and downlink DPDCH
and DPCCH. This method and system is equally well suited for Physical Random Access Channel (PRACH) message part.
The uplinlc Dedicated Physical Control Channel (DPCCH) and Dedicated Physical Data Channel (DPDCH) are transmitted on different codes. The gain factors [3~
and [3d are important to 3GPP WCDMA system performance like capacity.
The initial uplink DPCCH transmit power is set by higher layers. Subsequently the uplinlc transmit power control procedure simultaneously controls the power of a DPCCH and its corresponding DPDCHs (if present). The relative transmit power offset between DPCCH and DPDCHs is determined by the network and is computed using the gain factors signaled to the User Equipment (UE) using higher layer signaling.
There are two ways of controlling the gain factors of the DPCCH code and the DPDCH codes for different Transport Format Combinations (TFCs) in normal (non-compressed) frames:
- ~3~ and ~3d are signalled for the TFC, or - ,(3~ and /3~ is computed for the TFC, based on the signalled settings for a reference TFC.
Combinations of the two above methods may be used to associate ~~ and /.3d values to all TFCs in the TFCS. The gain factors may vary on radio frame basis (1 radio frame = 10 ms) depending on the current TFC used. Further, the setting of gain factors is independent of the inner loop power control.
The operation of the inner power control loop, adjusts the power of the DPCCH
and DPDCHs by the same amount, provided there are no changes in gain factors.
Additional adjustments to the power of the DPCCH associated with the use of compressed mode. Any change in the uplink DPCCH transmit power shall take place immediately before the start of the pilot field on the DPCCH. The change in DPCCH
power with respect to its previous value is derived by the User Equipment and is denoted bY ~DPCCH (in dB). The previous value of DPCCH power shall be that used in the previous slot, except in the event of an interruption in transmission due to the use of S compressed mode, when the previous value shall be that used in the last slot before the transmission gap.
During the operation of the uplinlc power control procedure the User Equipment transmit power shall not exceed a maximum allowed value which is the lower out of the maximum output power of the terminal power class and a value which may be set by higher layer signaling. Uplinlc power control shall be performed while the User Equipment transmit power is below the maximum allowed output power. If the User Equipment transmit power is below the required minimum output power [as defined in TS 25.101] and the derived value of dDPCCH is less than zero, the User Equipment may reduce the magnitude of ~DPCCH.
1S The User Equipment shall scale the total transmit power of the DPCCH and DPDCH(s), such that the DPCCH output power follows the changes required by the power control procedure with power adjustments of dDPCCH dB, unless this would result in a User Equipment transmit power above the maximum allowed power. In this case the User Equipment shall scale the total transmit power so that it is equal to the maximum allowed power.
The gain factors during compressed frames are based on the nominal power relation defined in normal frames.
When the gain factors /.3~ and did are signaled by higher layers for a certain TFC, the signaled values are used directly for weighting of DPCCH and DPDCH(s). The variable A~, called the nominal power relation is then computed as:
A~ _ ~'' Equation 1.
'.
and [3d are important to 3GPP WCDMA system performance like capacity.
The initial uplink DPCCH transmit power is set by higher layers. Subsequently the uplinlc transmit power control procedure simultaneously controls the power of a DPCCH and its corresponding DPDCHs (if present). The relative transmit power offset between DPCCH and DPDCHs is determined by the network and is computed using the gain factors signaled to the User Equipment (UE) using higher layer signaling.
There are two ways of controlling the gain factors of the DPCCH code and the DPDCH codes for different Transport Format Combinations (TFCs) in normal (non-compressed) frames:
- ~3~ and ~3d are signalled for the TFC, or - ,(3~ and /3~ is computed for the TFC, based on the signalled settings for a reference TFC.
Combinations of the two above methods may be used to associate ~~ and /.3d values to all TFCs in the TFCS. The gain factors may vary on radio frame basis (1 radio frame = 10 ms) depending on the current TFC used. Further, the setting of gain factors is independent of the inner loop power control.
The operation of the inner power control loop, adjusts the power of the DPCCH
and DPDCHs by the same amount, provided there are no changes in gain factors.
Additional adjustments to the power of the DPCCH associated with the use of compressed mode. Any change in the uplink DPCCH transmit power shall take place immediately before the start of the pilot field on the DPCCH. The change in DPCCH
power with respect to its previous value is derived by the User Equipment and is denoted bY ~DPCCH (in dB). The previous value of DPCCH power shall be that used in the previous slot, except in the event of an interruption in transmission due to the use of S compressed mode, when the previous value shall be that used in the last slot before the transmission gap.
During the operation of the uplinlc power control procedure the User Equipment transmit power shall not exceed a maximum allowed value which is the lower out of the maximum output power of the terminal power class and a value which may be set by higher layer signaling. Uplinlc power control shall be performed while the User Equipment transmit power is below the maximum allowed output power. If the User Equipment transmit power is below the required minimum output power [as defined in TS 25.101] and the derived value of dDPCCH is less than zero, the User Equipment may reduce the magnitude of ~DPCCH.
1S The User Equipment shall scale the total transmit power of the DPCCH and DPDCH(s), such that the DPCCH output power follows the changes required by the power control procedure with power adjustments of dDPCCH dB, unless this would result in a User Equipment transmit power above the maximum allowed power. In this case the User Equipment shall scale the total transmit power so that it is equal to the maximum allowed power.
The gain factors during compressed frames are based on the nominal power relation defined in normal frames.
When the gain factors /.3~ and did are signaled by higher layers for a certain TFC, the signaled values are used directly for weighting of DPCCH and DPDCH(s). The variable A~, called the nominal power relation is then computed as:
A~ _ ~'' Equation 1.
'.
5 Typically each TFC has a unique data rate connected with a unique pair of gain factors for the DPCCH and DPDCH. The change of gain factors for DPCCH and DPDCH are performed to keep constant the transmitted bit energy Eb (before coding) on the DPDCH, independent of the data rate. The DPCCH power is kept constant to avoid affecting the transmit power control (TPC). If the power ratio between DPDCH
and DPCCH goes wrong, the TPC loop operating based on DPCCH will degrade the WCDMA system performance.
The present invention provides a method and system to determine the gain factors for the uplink DPDCH and DPCCH.
rr~(1'~-1~ 1 1 1 '~~i~~l'13,3./1~~. '~y-t~~_1 ~~.. ~1,~1~ ~ r~ ~1-., ' 1 _ l~ h i .1.. '~ ,i... (i ~ ~li'~~'~~a/f~;.~~ 1 _ P~ y-r~"
_1 ' Equation 2.
In Equation 2, m represents number of paths, P represents reference power ratio, Ro represents cutoff rate, ro represents coding rate, B" represents the noise bandwidth, and, Rb represents information bit rate. A lcey concept of the present invention is to link up the nominal power relation in Equation 1 with both system and radio channel parameters through the closed form relationship given by Equation 2.
Referring to the functional diagram in Fig. 1 there can be seen an illustration of the use of the present invention in the form of a functional block diagram to set up the normalized reference power ratio. By using an example the working principle behind the present invention can be better illustrated. In Step 102 we use the corresponding reference power ratio for voice (Most times the system parameters are optimized for voice performance and for a WCDMA system the initial focus is voice applications) as the initial value of Po. When the system is required to serve a new data rate, say r=3841:bps, we need to figure out what the new nominal power relation in Equation 1.
The method illustrated in Fig. I is used to obtain the new A1. This new A~ can be used by the system to set up the signaled gain factors for the reference TFC. The settings can be sent through higher layers for a certain TFC. What really matters is the relative settings of one data rate to another initial data rate such as a voice channel. The relative settings play an important role in "calibrating" the system settings. If there is a system error in Equation 2, this scaling can reduce the error such that the relative settings can more accurately describe the functional relationship between one DPDCH data channel and another DPDCH data channel.
I S In step 102 an initial value is given to Ao. The data rate in step 104 is given. In step 106 the necessary system and radio channel parameters necessary for Equation 2 are given. The reference power ratio P~=P is solved using Equation 2 in step 108.
The normalized reference power ratio is determined in step 110. Steps 104 through 110 are dynamically repeated for new data rate.
In the present invention, the dynamic nature of the radio channel is directly related to the dynamic nature of the DPDCH data channel. Therefore the present invention responds quickly to the radio channel of the air interface while the mobile terminal is moving around. No simple scheme in power settings can be accurate without dynamic response to the real-time radio channel being experienced by the DPDCH
data channel and the DPCCH channel. Thus this scheme can be regarded as the adaptive scheme for the system to set up the resources to make certain that the WCDMA
system works at an optimal state.
The significance of this method is the speed of the quick convergence.
Although it may not be so accurate for some working conditions, the method is Fig. 1 dynamically adjust the nominal power relation quickly. Thus the system is always working at the quasi-optimal system settings. One result of the net advantages of this method is that the system resource or system power is not wasted and thus the interference is minimized.
These two interacting factors both lead to higher system throughput or system capacity.
In view of the foregoing description, numerous modifications and alternative embodiments of the invention will be apparent to those skilled in the art. The present invention is equally well suited for both uplink of WCDMA and similar systems like CDMA2000. One feature of the present invention is a method and system to determine the gain factors for the uplink and downlink DPDCH and DPCCH. This method and system is equally well suited for Physical Random Access Channel (PRACH) message part. Accordingly, this description is to be construed as illustrative only and is for the purpose of teaching those skilled in the art the best mode of carrying out the invention.
Details of the structure may be varied substantially without departing from the spirit of the invention, and the exclusive use of all modifications, which come within the scope of the appended claim, is reserved.
and DPCCH goes wrong, the TPC loop operating based on DPCCH will degrade the WCDMA system performance.
The present invention provides a method and system to determine the gain factors for the uplink DPDCH and DPCCH.
rr~(1'~-1~ 1 1 1 '~~i~~l'13,3./1~~. '~y-t~~_1 ~~.. ~1,~1~ ~ r~ ~1-., ' 1 _ l~ h i .1.. '~ ,i... (i ~ ~li'~~'~~a/f~;.~~ 1 _ P~ y-r~"
_1 ' Equation 2.
In Equation 2, m represents number of paths, P represents reference power ratio, Ro represents cutoff rate, ro represents coding rate, B" represents the noise bandwidth, and, Rb represents information bit rate. A lcey concept of the present invention is to link up the nominal power relation in Equation 1 with both system and radio channel parameters through the closed form relationship given by Equation 2.
Referring to the functional diagram in Fig. 1 there can be seen an illustration of the use of the present invention in the form of a functional block diagram to set up the normalized reference power ratio. By using an example the working principle behind the present invention can be better illustrated. In Step 102 we use the corresponding reference power ratio for voice (Most times the system parameters are optimized for voice performance and for a WCDMA system the initial focus is voice applications) as the initial value of Po. When the system is required to serve a new data rate, say r=3841:bps, we need to figure out what the new nominal power relation in Equation 1.
The method illustrated in Fig. I is used to obtain the new A1. This new A~ can be used by the system to set up the signaled gain factors for the reference TFC. The settings can be sent through higher layers for a certain TFC. What really matters is the relative settings of one data rate to another initial data rate such as a voice channel. The relative settings play an important role in "calibrating" the system settings. If there is a system error in Equation 2, this scaling can reduce the error such that the relative settings can more accurately describe the functional relationship between one DPDCH data channel and another DPDCH data channel.
I S In step 102 an initial value is given to Ao. The data rate in step 104 is given. In step 106 the necessary system and radio channel parameters necessary for Equation 2 are given. The reference power ratio P~=P is solved using Equation 2 in step 108.
The normalized reference power ratio is determined in step 110. Steps 104 through 110 are dynamically repeated for new data rate.
In the present invention, the dynamic nature of the radio channel is directly related to the dynamic nature of the DPDCH data channel. Therefore the present invention responds quickly to the radio channel of the air interface while the mobile terminal is moving around. No simple scheme in power settings can be accurate without dynamic response to the real-time radio channel being experienced by the DPDCH
data channel and the DPCCH channel. Thus this scheme can be regarded as the adaptive scheme for the system to set up the resources to make certain that the WCDMA
system works at an optimal state.
The significance of this method is the speed of the quick convergence.
Although it may not be so accurate for some working conditions, the method is Fig. 1 dynamically adjust the nominal power relation quickly. Thus the system is always working at the quasi-optimal system settings. One result of the net advantages of this method is that the system resource or system power is not wasted and thus the interference is minimized.
These two interacting factors both lead to higher system throughput or system capacity.
In view of the foregoing description, numerous modifications and alternative embodiments of the invention will be apparent to those skilled in the art. The present invention is equally well suited for both uplink of WCDMA and similar systems like CDMA2000. One feature of the present invention is a method and system to determine the gain factors for the uplink and downlink DPDCH and DPCCH. This method and system is equally well suited for Physical Random Access Channel (PRACH) message part. Accordingly, this description is to be construed as illustrative only and is for the purpose of teaching those skilled in the art the best mode of carrying out the invention.
Details of the structure may be varied substantially without departing from the spirit of the invention, and the exclusive use of all modifications, which come within the scope of the appended claim, is reserved.
Claims (7)
1. A method for adaptive pilot/traffic channel power control in a CDMA
communication system, the method comprising the following steps:
determining new data rate for transmission;
providing corresponding system and radio channel parameters;
determining reference power ratio P1; and, normalizing the reference power ratio.
communication system, the method comprising the following steps:
determining new data rate for transmission;
providing corresponding system and radio channel parameters;
determining reference power ratio P1; and, normalizing the reference power ratio.
2. The method as recited in claim 1 further comprising the step of assigning an initial power ratio A0.
3. The method as recited in claim 2 wherein said initial power ratio A0 is for voice.
4. The method as recited in claim 1 wherein the reference power ratio is determined by wherein m represents number of paths; P represents reference power ratio; R0 represents cutoff rate; r0 represents coding rate; B n represents the noise bandwidth; and, R b represents information bit rate.
5. The method as recited in claim 1 wherein the normalized reference power ratio is determined by A1 = (P1/P0)*A0.
6. The method as recited in claim 1 further comprising repeating the steps for each new data rate.
7. The invention as substantially described and shown herein.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US25826000P | 2000-12-22 | 2000-12-22 | |
| US60/258,260 | 2000-12-22 | ||
| PCT/US2001/050552 WO2002052757A1 (en) | 2000-12-22 | 2001-12-21 | Adaptive pilot/traffic channel power control for 3gpp wcdma |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2436042A1 true CA2436042A1 (en) | 2002-07-04 |
Family
ID=22979778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002436042A Abandoned CA2436042A1 (en) | 2000-12-22 | 2001-12-21 | Adaptive pilot/traffic channel power control for 3gpp wcdma |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1354433A1 (en) |
| CA (1) | CA2436042A1 (en) |
| WO (1) | WO2002052757A1 (en) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7295857B2 (en) | 2002-10-30 | 2007-11-13 | Qualcomm Incorporated | Method and apparatus for performing acquisition in power save mode for wireless communication systems |
| DE10306453A1 (en) * | 2003-02-17 | 2004-08-26 | Deutsche Telekom Ag | Wireless data exchange method in which administrator is used to automatically connect mobile terminal or terminals in optimum manner via available network connection according to required bandwidth |
| JP4099086B2 (en) * | 2003-02-28 | 2008-06-11 | 株式会社エヌ・ティ・ティ・ドコモ | Mobile communication system, radio control apparatus, base station, and transmission power control method |
| JP2004297231A (en) * | 2003-03-26 | 2004-10-21 | Nec Corp | Mobile communication system, radio base station apparatus and power control method used for them |
| KR100996079B1 (en) | 2003-09-03 | 2010-11-22 | 삼성전자주식회사 | Method and apparatus for controlling reverse traffic-to-pilot power ratio in mobile communication system |
| US7630731B2 (en) | 2003-09-08 | 2009-12-08 | Lundby Stein A | Apparatus, system, and method for managing reverse link communication |
| US7724701B2 (en) * | 2003-09-30 | 2010-05-25 | Qualcomm Incorporated | Method and apparatus for controlling reverse link data rate of a mobile station in a communication system with reverse link common rate control |
| GB2408420B (en) * | 2003-11-21 | 2006-05-10 | Motorola Inc | Method of power control and corresponding power controller |
| US8452316B2 (en) * | 2004-06-18 | 2013-05-28 | Qualcomm Incorporated | Power control for a wireless communication system utilizing orthogonal multiplexing |
| GB0420847D0 (en) | 2004-09-20 | 2004-10-20 | Koninkl Philips Electronics Nv | A radio communication system, a radio station, and a method of transmitting data |
| KR100678192B1 (en) * | 2005-02-04 | 2007-02-02 | 삼성전자주식회사 | Method and apparatus for setting gain factors of dedicated physical channels in mobile communication system |
| US8942639B2 (en) | 2005-03-15 | 2015-01-27 | Qualcomm Incorporated | Interference control in a wireless communication system |
| US8848574B2 (en) | 2005-03-15 | 2014-09-30 | Qualcomm Incorporated | Interference control in a wireless communication system |
| KR100827117B1 (en) * | 2005-03-29 | 2008-05-02 | 삼성전자주식회사 | Method and apparatus for transmitting maximum transmitter power information of terminal to base station for scheduling uplink packet transmission in mobile communication system |
| JP2009514429A (en) * | 2005-10-27 | 2009-04-02 | クゥアルコム・インコーポレイテッド | Method and apparatus for transmitting an access probe in a wireless communication system |
| WO2007050926A2 (en) | 2005-10-27 | 2007-05-03 | Qualcomm Incorporated | Method and apparatus for estimating reverse link loading in a wireless communication system |
| US8036151B2 (en) | 2006-12-17 | 2011-10-11 | Qualcomm Incorporated | Power-based rate signaling for cellular uplink |
| CN101820649B (en) * | 2010-05-18 | 2014-10-22 | 中兴通讯股份有限公司 | Method and system for selecting enhanced dedicated transport channel transport format combination |
| US8682377B1 (en) | 2010-08-26 | 2014-03-25 | Sprint Spectrum L.P. | Systems and methods for adjusting the power control settings in a wireless communication network |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5267262A (en) * | 1989-11-07 | 1993-11-30 | Qualcomm Incorporated | Transmitter power control system |
| US5710758A (en) * | 1995-09-29 | 1998-01-20 | Qualcomm Incorporated | Wireless network planning tool |
| US5771461A (en) * | 1996-06-28 | 1998-06-23 | Motorola, Inc. | Method and apparatus for power control of a first channel based on a signal quality of a second channel |
-
2001
- 2001-12-21 EP EP01992407A patent/EP1354433A1/en not_active Withdrawn
- 2001-12-21 CA CA002436042A patent/CA2436042A1/en not_active Abandoned
- 2001-12-21 WO PCT/US2001/050552 patent/WO2002052757A1/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| EP1354433A1 (en) | 2003-10-22 |
| WO2002052757A1 (en) | 2002-07-04 |
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