WO2006004189A1 - Process for assigning radio resources between a number of multiplexed transport channels in a physical channel - Google Patents
Process for assigning radio resources between a number of multiplexed transport channels in a physical channel Download PDFInfo
- Publication number
- WO2006004189A1 WO2006004189A1 PCT/JP2005/012620 JP2005012620W WO2006004189A1 WO 2006004189 A1 WO2006004189 A1 WO 2006004189A1 JP 2005012620 W JP2005012620 W JP 2005012620W WO 2006004189 A1 WO2006004189 A1 WO 2006004189A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- qos
- physical channel
- transport channels
- services
- service
- Prior art date
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
- H04W52/30—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
- H04W52/346—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading distributing total power among users or channels
-
- 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
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
- H04W52/0245—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal according to signal strength
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/18—Negotiating wireless communication parameters
-
- 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
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/241—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Definitions
- the invention consists in the field of telecommunications and concerns more specifically a process for assigning radio resources between a number M of multiplexed transport channels in a physical channel, each transport channel carrying a service and/or data having a specific Quality of Service (QoS) requirement between a user terminal and a base station of a cellular telecommunications network.
- QoS Quality of Service
- the invention concerns also a mobile terminal and a base station adapted for the use of the process.
- the transmission power of a mobile terminal or a base station in the network of cellular telecommunications is systematically controlled in order to, on one hand, ensure the same quality of service (QoS) for the terminal independently of its position in the network, and on the other hand, increase the autonomy of the battery while avoiding to increase uselessly the level of interference in a cell.
- QoS quality of service
- This control can be done on the uplink as well as on the downlink.
- the base station On the uplink, the base station (“Node B”) measures the present signal to interference ratio (SIR) on the received signal and transmits to the terminal a command in order that the latter adjusts its transmission power.
- SIR signal to interference ratio
- the mobile terminal On the downlink, the mobile terminal performs similar operations to the downlink.
- This power control mechanism where the terminal and the base station adjust mutually their transmission powers is known in CDMA under the name of "Closed-loop power control.”
- the commands exchanged between the base station and the terminal in order to adjust their transmission powers are based on the level of an SIR (signal to interference ratio) established by a Radio Network Controller (RNC) in charge of the management of the radio resources in the cells it controls.
- RNC Radio Network Controller
- the first processing loop executes a rapid processing to adjust the power of the signal received by the terminal or by the base station in order to maintain the signal to interference radio (SIR) equal to a target SIR 0 value predetermined by the second loop.
- SIR signal to interference radio
- the second loop has the function to define the signal to interference ratio SIR 0 in order to maintain the block error rate (BLER) measured on the transport blocks of the received signal at a target value BLER 0 , ensuring the quality of service at the required level.
- BLER block error rate
- the internal loop comprises an adapted filter 2, a RAKE receiver 4, a module 6 for calculating the signal to interference ratio (SIR) and a module 8 for producing command bits (TPC, for Transmit Power Control).
- SIR signal to interference ratio
- TPC command bits
- the external loop comprises in addition to the adapted filter 2 and RAKE receiver 4, a channel decoder 10, a module 12 for detecting block errors and a module 14 for comparing the BLER with the target BLER 0 value to update the SIR C .
- the module 6 calculates the present SIR relative to a received signal and transmits the calculated SIR to module 8 which produces a bit "0" if the calculated SIR is greater than the SIR 0 target value, or a bit “1 " if the calculated SIR is smaller than SIR C .
- the estimation of SIR 0 is based on a measure of the link quality in terms of BLER.
- the optimal value of SIR 0 must be such that the desired link quality is achieved with the minimal transmission power of the base station or the mobile terminal. If the estimated quality is higher than the target one, the SIRc value is reduced, and in the opposite case, the value is increased.
- the control executed by the external loop adjusts dynamically the target signal to interference ratio SIR 0 in order to maintain, for each service carried via the physical channel, the block error rate BLER measured on the blocks carrying the received signal at a target value BLER 0 .
- This target signal to interference ratio SIR 0 is defined according to the service requiring the highest SIR 0 . Thereby, the transmission power required to attain this target signal to interference ratio SIR 0 can be overestimated for the other multiplexed services which require a lower SIR 0 .
- the invention proposes a process for assigning radio resources between a number M of multiplexed transport channels in a physical channel, each transport channel carrying a service and/or data having a requirement of a specific quality of service (QoS) between a user terminal and a base station of a cellular telecommunications network.
- QoS quality of service
- the process of the invention comprises the following steps: a) - estimating the quality of service (QoS) of each of the transport channels received, b) - determining N services among the M services for which the QoS is greater than a predetermined target value, c) - reducing the proportion of the physical channel allocated to the N transport channels determined in the step b) by modifying their flow adaptation parameters, d) - waiting for convergence of the power control loop, e) - executing the steps c) and d) until the specific QoS of each channel is attained with minimal transmission power of the physical channel.
- QoS quality of service
- This process comprises also the step during which, for each transport channel, the signal to interference ratio (SIR) is estimated and the transmission power is set so as to attain the optimal target signal to interference ratio (SIR C0 ) ensuring the QoS required for each transport channel while minimizing the transmitted power.
- SIR signal to interference ratio
- the reduction of the transmission flow in the transport channels for which the QoS is greater than a predetermined target value is achieved by modification of a flow adaptation parameter predetermined for each transport channel.
- the process of the invention is preferably used in a UMTS cellular network.
- the flow adaptation parameter is the RM (Rate Matching) parameter defined in Specification TS25.212.
- the invention concerns also a mobile terminal capable of exchanging with a base station, via one physical channel, a plurality of services and/or data each having a requirement of a specific QoS.
- This terminal includes means for adapting dynamically and selectively the data flow of a part of the services less demanding in terms of QoS in order to reduce the transmission power without degradation of the quality of the services more demanding in terms of QoS.
- the invention concerns also a base station of a cellular telecommunications network capable of exchanging with a mobile terminal, via one physical channel, a plurality of services and/or data each having a requirement of a specific QoS.
- This base station includes means for adapting dynamically and selectively the data flow of a part of the services less demanding in terms of QoS in order to reduce the transmission power without degradation of the quality of the services more demanding in terms of QoS.
- FIG. 2 represents a general flow chart illustrating the process of the invention.
- the following description concerns the use of the process in a UMTS cellular network in which a mobile terminal, linked to a base station, receives, through one physical connection, four distinct services with distinct quality of service QoS requirements, such as a vocal service, a video service, a data service and an Internet connection. These services are carried by four distinct transport channels TrCHI , TrCH2, TrCH3 and TrCH4 multiplexed in the same physical channel linking the base station and the terminal.
- the power control in closed loop is activated.
- the base station measures continually the quality of the signal in terms of signal to interference ratio (SIR) and sends a command to the terminal on the downlink channel requesting an increase of transmission power if the measured SIR is smaller than the target value SIR C) or a reduction of the transmission power if the measured SIR is greater than the target value SIR C .
- SIR signal to interference ratio
- the rapid adjustment of the target value is done by power control on the external loop at the level of the mobile terminal.
- the internal loop executes a rapid processing to adjust the power of the signal received by the terminal or the base station in order to maintain the signal to interference ratio (SIR) equal to a predetermined target value SIR 0 through the external loop.
- the latter determines the target signal to interference ratio SIR 0 so as to maintain the block error rate (BLER) measured on the transport blocks of the signals received via each of the transport channels TrCHI , TrCH2, TrCH3 et TrCH4 at a target value BLER C .
- Figure 2 indicates schematically the steps of the process of the invention to adapt the flow adaptation parameters allowing for minimizing the transmission power while ensuring the quality of service desired for each of the transport channels TrCHI , TrCH2, TrCH3 and TrCH4.
- Step 32 consists in measuring the block error rate (BLER) on the transport blocks of the signals received via each of the transport channels TrCHI , TrCH2, TrCH3 and TrCH4.
- BLER block error rate
- Step 34 consists in verifying if the BLER measured for each of the transport channels TrCHI , TrCH2, TrCH3 has at least reached the target BLERc determined for each of these channels.
- step 32 If the measured BLER has not converged towards the target BLER C , the process is resumed from step 32.
- step 36 which consists in determining the N transport channels presenting a BLER greater than the predetermined threshold at the target value BLER 0 .
- Step 38 consists in selectively modifying the RM (Rate Matching) parameter of theses channels to allow reduction of the transmission power while still ensuring the target value BLER 0 for each of the transport channels-
- Step 40 consists in adjusting all the RM of a common factor if at least one value of the modified RM is under the minimal normalized RM.
- the common factor is selected to ensure that all the RM values are included between the minimal and maximal normalized values.
- Figure 3 presents schematically the evolution of the BLER of the four transport channels TrCHI , TrCH2, TrCH3 and TrCH4 compared with their target value BLER 0 according to the update of the flow adaptation parameters, as well as the SIR 0 .
- the TrCHI channel presents a BLER value for which the service carried via this channel has a quality of service inferior to the target QoS
- each of the TrCH2, TrCH3 and TrCH4 channels present a BLER value for which the service carried via this channel has a quality of service superior to the target QoS.
- the transmission power is increased (arrow P in Figure 3B) for all the transport channels.
- the parameter RM (arrows D2 to D4 in Figure 3C) of the channels TrCH2, TrCH3 and TrCH4 is selectively decreased, which has the effects of automatically reducing the proportion of the flow of the physical channel allocated to the channels TrCH2, TrCH3 and TrCH4 and automatically increasing the proportion of the flow of the physical channel allocated to channel TrCHI .
- This has the consequence of increasing the BLER of the channels TrCH2, TrCH3 and TrCH4 and reducing the BLER of channel TrCHI (arrow D1 in Figure 3C).
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/571,346 US20070253366A1 (en) | 2005-07-01 | 2005-07-01 | Process for Assigning Radio Resources Between a Number of Multiplexed Transport Channels in a Physical Channel |
JP2006549723A JP2008505511A (en) | 2004-07-01 | 2005-07-01 | The process of allocating radio resources among multiple multiplexed transport channels within a physical channel |
EP05758167A EP1767039A1 (en) | 2004-07-01 | 2005-07-01 | Process for assigning radio resources between a number of multiplexed transport channels in a physical channel |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0451388A FR2872670A1 (en) | 2004-07-01 | 2004-07-01 | METHOD FOR DISTRIBUTING RADIO RESOURCES BETWEEN A PLURALITY OF MULTIPLEX TRANSPORT CHANNELS IN A PHYSICAL CHANNEL |
FR0451388 | 2004-07-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006004189A1 true WO2006004189A1 (en) | 2006-01-12 |
Family
ID=34948628
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/012620 WO2006004189A1 (en) | 2004-07-01 | 2005-07-01 | Process for assigning radio resources between a number of multiplexed transport channels in a physical channel |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1767039A1 (en) |
JP (1) | JP2008505511A (en) |
CN (1) | CN1981552A (en) |
FR (1) | FR2872670A1 (en) |
WO (1) | WO2006004189A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009525696A (en) * | 2006-02-03 | 2009-07-09 | インターデイジタル テクノロジー コーポレーション | Service quality-based resource determination and allocation apparatus and procedure in high-speed packet access evolution and long-term evolution systems |
CN101154972B (en) * | 2006-09-26 | 2011-09-21 | 中兴通讯股份有限公司 | Multiplexing method for part of special physical channel |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5581655B2 (en) * | 2009-11-09 | 2014-09-03 | 沖電気工業株式会社 | Relay device and relay method |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1069798A1 (en) * | 1999-07-12 | 2001-01-17 | Lucent Technologies Inc. | Universal mobile telephone system network with improved rate matching method |
FR2817094A1 (en) * | 2000-11-17 | 2002-05-24 | Cit Alcatel | METHOD FOR CONTROLLING TRANSMISSION POWER IN A MOBILE RADIO COMMUNICATION SYSTEM |
EP1215833A1 (en) * | 2000-12-14 | 2002-06-19 | Lucent Technologies Inc. | Method of controlling quality of service of a CDMA-based system |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002051007A (en) * | 2000-08-03 | 2002-02-15 | Matsushita Electric Ind Co Ltd | Radio communication unit and transmission power control method |
KR20050010978A (en) * | 2002-06-28 | 2005-01-28 | 코닌클리즈케 필립스 일렉트로닉스 엔.브이. | Adaptive rate matching method |
-
2004
- 2004-07-01 FR FR0451388A patent/FR2872670A1/en active Pending
-
2005
- 2005-07-01 CN CNA2005800221569A patent/CN1981552A/en active Pending
- 2005-07-01 WO PCT/JP2005/012620 patent/WO2006004189A1/en not_active Application Discontinuation
- 2005-07-01 JP JP2006549723A patent/JP2008505511A/en active Pending
- 2005-07-01 EP EP05758167A patent/EP1767039A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1069798A1 (en) * | 1999-07-12 | 2001-01-17 | Lucent Technologies Inc. | Universal mobile telephone system network with improved rate matching method |
FR2817094A1 (en) * | 2000-11-17 | 2002-05-24 | Cit Alcatel | METHOD FOR CONTROLLING TRANSMISSION POWER IN A MOBILE RADIO COMMUNICATION SYSTEM |
EP1215833A1 (en) * | 2000-12-14 | 2002-06-19 | Lucent Technologies Inc. | Method of controlling quality of service of a CDMA-based system |
Non-Patent Citations (1)
Title |
---|
"Universal Mobile Telecommunications System (UMTS); Multiplexing and channel coding (FDD) (3GPP TS 25.212 version 5.5.0 Release 5); ETSI TS 125 212", ETSI STANDARDS, EUROPEAN TELECOMMUNICATIONS STANDARDS INSTITUTE, SOPHIA-ANTIPO, FR, vol. 3-R1, no. V550, June 2003 (2003-06-01), XP014008374, ISSN: 0000-0001 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009525696A (en) * | 2006-02-03 | 2009-07-09 | インターデイジタル テクノロジー コーポレーション | Service quality-based resource determination and allocation apparatus and procedure in high-speed packet access evolution and long-term evolution systems |
JP4870785B2 (en) * | 2006-02-03 | 2012-02-08 | インターデイジタル テクノロジー コーポレーション | Service quality-based resource determination and allocation apparatus and procedure in high-speed packet access evolution and long-term evolution systems |
CN101154972B (en) * | 2006-09-26 | 2011-09-21 | 中兴通讯股份有限公司 | Multiplexing method for part of special physical channel |
Also Published As
Publication number | Publication date |
---|---|
FR2872670A1 (en) | 2006-01-06 |
CN1981552A (en) | 2007-06-13 |
JP2008505511A (en) | 2008-02-21 |
EP1767039A1 (en) | 2007-03-28 |
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