CN1714518A - Outer loop power control for wireless communication systems - Google Patents

Outer loop power control for wireless communication systems Download PDF

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Publication number
CN1714518A
CN1714518A CN200380104046.8A CN200380104046A CN1714518A CN 1714518 A CN1714518 A CN 1714518A CN 200380104046 A CN200380104046 A CN 200380104046A CN 1714518 A CN1714518 A CN 1714518A
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wtru
receiving element
step number
wireless transmission
transmission
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CN1714518B (en
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章修·谷
苏希尔·A·格兰帝
史蒂芬·E·泰利
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InterDigital Technology Corp
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InterDigital Technology Corp
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Abstract

A method, system, and components for outer loop power control particularly useful for non-real time data services uses data transmitted in many short bursts of short duration, called Temp-DCH allocations. A target metric, preferably target SIR, is adjusted with differing step up and step down target metric adjustments. The initial target SIR and the transient step size for target SIR adjustment is determined in a dynamic way in the outer loop power control for each Temp-DCH allocation of non-real time data.

Description

Wireless communication system is controlled with outer loop power
Technical field
The invention relates to wireless communication system.Particularly, the invention relates to the power control of this class wireless communication system.
Background technology
Radio telecommunications system is the known technology in field of the present invention.For the global link of wireless system is provided, radio telecommunications system is development or implements various industry standards.In wideband was used, a kind of existing industry standard was to be called global mobile communication system (GSM).This industry standard promptly is a so-called second generation mobile radio system standard (2G), and its revision industry standard then is so-called second the five generation mobile radio system standard (2.5G).In second the five generation mobile radio system standard (2.5G), whole packet radio service (GPRS) and the whole packet radio service environment of enhanced data (EDGE) are two kinds of representative technology, it can provide data, services more at a high speed compared to global mobile communication system (GSM) network of second generation mobile radio system standard (2G).In these industry standards, various industry standards all can provide extra characteristic and improvement, use shortcoming or the deficiency of improving known industry standard.In January, 1998, ETSI-mobile especially group (ETSI-SMG) obtains common recognition at the radio switch-in method of third generation wireless system, and it is so-called Universal Mobile Telecommunications System (UMTS).In order further to implement this Universal Mobile Telecommunications System (UMTS) standard, third generation cooperative programme (3GPP) is to set up in December, 1998, and third generation cooperative programme (3GPP) is to continue to promote third generation mobile radio standard.
Fig. 1 illustrates a kind of typical Universal Mobile Telecommunications System (UMTS) system architecture, and it is to meet existing third generation cooperative programme (3GPP) specification.This universal mobile telephone service (UMTS) network architecture is to have a core network (CN), it is the interface via a kind of Iu of being called, use with a universal mobile telephone service (UMTS) face of land Radio Access Network (UTRAN) and be connected to each other, wherein, this Iu interface is that specific definition is in existing third generation cooperative programme (3GPP) specification file that can openly obtain.This universal mobile telephone service (UMTS) face of land Radio Access Network (UTRAN) is the wave point via a kind of Uu of being called, see through wireless transmission and receiving element (WTRU), it is to be called user's equipment (UE) in existing third generation cooperative programme (3GPP) specification, provides wireless telecommunication services to the user.This universal mobile telephone service (UMTS) face of land Radio Access Network (UTRAN) has single or several radio network controllers (RNC) and base station, it is to be called the B node in existing third generation cooperative programme (3GPP) specification, uses the geography covering of carrying out radio communication with user's equipment (UE) collectively is provided.Single or plural B node is the interface that is called Iub via a kind of in existing third generation cooperative programme (3GPP) specification, is connected to each radio network controller (RNC) respectively.This universal mobile telephone service (UMTS) face of land Radio Access Network (UTRAN) is the B node that can have several groups, and it is to be connected to different radio network controller (RNC) respectively, and the example that Fig. 1 illustrated is the B node with two groups.When a universal mobile telephone service (UMTS) face of land Radio Access Network (UTRAN) provided a radio network controller (RNC) incessantly, the communication of (inter-RNC) was to carry out via the interface of a kind of Iur of being called between each radio network controller.
The communication of these networking component outsides is via this Uu interface, based on user's grade utilize these B nodes to carry out, and, connect via the various core networks of external system, utilize this core network execution based on network hierarchy ground.
Generally speaking, the base station (such as: the major function B node) provides wireless connections between these base stations (BS) network and these wireless transmission and receiving element (WTRU).Typically, B node is an emission shared channel signal, uses the sequential that makes the wireless transmission that do not connect and receiving element (WTRU) can be synchronized with this base station (BS).In existing third generation cooperative programme (3GPP), a B node is the entity wireless connections of execution and these user's equipment (UE).This B node is via this radio network controller (RNC), receives this signal above Iub interface, uses this B node of control at this wireless signal that transmits above Uu interface.
A core network (CN) is to be responsible for information is routed to its correct destination.For instance, this core network (CN) is can be with the speech communication of user's equipment (UE), it is to utilize this universal mobile telecommunications service (umts), receive via some B nodes, routes to the predetermined grouped data of a public switched telephone network (PSTN) or world-wide web (the Internet).In existing third generation cooperative programme (3GPP), this core network (CN) is to have six primary clusterings, and it comprises: (1) service universal grouping wireless service (GPRS) support node; (2) gateway general packet radio service (GPRS) support node; (3) borde gateways; (4) visitor's location cache; (5) mobile switching centers that serve; And (6) gateways move and serve switching center.This service universal grouping wireless service (GPRS) support node provides the access in packet switching network territory, such as: world-wide web (the Internet).This gateway general packet radio service (GPRS) support node is a gateway node that connects other network.Go to all data communications of other operator's network or world-wide web (the Internet) all can pass through this gateway general packet radio service (GPRS) support node.A fire compartment wall serves as in this borde gateway system, uses and avoids the attack of this network-external effractor at this network field internal user.This visitor's location cache provides an existing service network " duplicate " of the needed user data of service.These data are to take from a database of administering the mobile subscriber.This moves and serves switching center is " circuit switching " connection to this network of person in charge's universal mobile telecommunications service (umts) terminal.This gateway moves serves the existing position that switching center is based on the user, implements the routing function that needs.In addition, this gateway moves and serves the connection request that switching center could also receive and be responsible for the external network user.
Generally speaking, these radio network controllers (RNC) are the built-in functions of this universal mobile telecommunications service (umts) face of land Radio Access Network (UTRAN) of control.In addition, these radio network controllers (RNC) can also provide the trunking traffic service, it is to have: via a regional assembly that is connected with a Uu interface of a B node, and, an external service assembly via a connection between this core network (CN) and external system, for instance, the overseas call of a mobile telephone dial-up of a domestic universal mobile telecommunications service (umts) face of land Radio Access Network (UTRAN).
Typically, a radio network controller (RNC) is to supervise a plurality of base stations (BS), manage the entity Radio Resource that the wireless service of being served these base stations (BS) covers the geographic area and controls this Uu interface.In existing third generation cooperative programme (3GPP), the Iu interface of a radio network controller (RNC) provides two and is connected to this core network (CN), and wherein, a connection is to lead to a packet switching network territory, and another connection is to lead to a Circuit Switching Network territory.Other critical function of these radio network controllers (RNC) is to comprise: confidentiality and conformability protection.
In field of the present invention, many wireless communication systems are to use the adaptive power control algolithm.In this class wireless communication system, many communications are to share identical wireless frequency spectrum.When receiving certain specific communications, utilize all other communications of same frequency spectrum all can cause interference to this specific communications.Therefore, the transmission power level that increases certain communication may cause the signal quality of all other communications of this frequency spectrum inside to reduce.Yet, excessively reduce this transmission power level and also may cause highly undesirable signal quality at receiver end, such as: the quality of utilizing signal-to-jamming ratio (SIR) to measure.
In addition, in field of the present invention, wireless communication system is to have various Poewr control methods.For instance, Fig. 2 and Fig. 3 are open-loop power control transmission device system and the closed loop power control transmission device systems that represents wireless communication system respectively.The purpose of this class wireless communication system is, transmits channel and when the time, change was disturbed, changes transmitter power fast occurring successively decreasing, and use that transmitter power is minimized, and guaranteeing can be in the long-range data of receiving suitable quality.
In communication system such as third generation cooperative programme (3GPP) time division duplex (TDD) system and third generation cooperative programme (3GPP) frequency division duplexing (FDD) system, the shared channel of several variable data rates and dedicated channel are made up, and then carry out the purpose of transfer of data.The background specification data of this class wireless communication system be found in 3GPP TS 25.223 v3.3.0,3GPP TS25.222 v.3.2.0,3GPP TS 25.224 v3.6, and Volume 3 specification of Air-Interface for 3GMultiple System Version 1.0, first revised edition that wireless industry association (ARIB) provides.In response in the variation of data transfer rate, the fast power control adaptive method and the system that can obtain better performance see international publication number sign indicating number WO 02/09311 A2, its day for announcing is January 31 2002, and, corresponding to U.S. patent application case number 09/904001, its applying date is July 12 2001, and, allow the people have by of the present invention awarding equally.
In third generation cooperative programme (3GPP) Wideband-CDMA (W-CDMA) system, power control is in order to as a kind of link adaptation method.Dynamic power control is to be applied to DPCH (DPCH), use the service quality (QoS) that the through-put power that makes these DPCH (DPCH) can reach minimum transmission power position standard, and then limit the interference level of this third generation cooperative programme (3GPP) Wideband-CDMA (W-CDMA) internal system.
A kind of Poewr control method is that through-put power control is divided into stand-alone program, and it is called outer-loop power control (OLPC) and home loop power control (ILPC).Whether open or seal according to this home loop, this power control system can be called open power control system or circulating power control system usually.In Fig. 2 and example shown in Figure 3, the external circuit of two kinds of power control system types all is loops.In addition, in example shown in Figure 2, the home loop of this power control system type is to belong to open loop.
Externally in the power loop control, the power level of certain specific transmitter is to depend on certain target sir (SIR) numerical value.When certain receiver was received these transmission, the quality of this received signal can be measured.This transmission information is to utilize transport block (TB) for unit transmits, and this received signal quality is to monitor according to block error rate (BLER).This block error rate (BLER) is to utilize this receiver prediction, and it normally utilizes the Cyclic Redundancy Check of these data to predict.This prediction block error rate (BLER) can and certain target quality requirement, such as certain target block error rate (BLER), compare, its be illustrated in this above channel, service quality (QoS) requirement of various data service type.According to the received signal quality of this measurement, a target sir (SIR) is adjusted control signal can be sent to this transmitter.Subsequently, this transmitter just can be adjusted according to these, requires to carry out the adjustment of this target sir (SIR).
In third generation cooperative programme (3GPP) Wideband-CDMA (W-CDMA) system that uses time division duplex (TDD) pattern, this universal mobile telecommunications service (umts) face of land Radio Access Network (UTRAN) (service wireless network controller-radio resource controller (SRNC-RRC)) can be when calling/session establishment, this is opened beginning target sir (SIR) sets to this wireless transmission and receiving element (WTRU), subsequently, between the complete lifetime of this calling, according to the observation that upstream circuitry (UL) block error rate (BLER) measures, continue to adjust the target sir (SIR) of this wireless transmission and receiving element (WTRU).
In home loop power control, this receiver can compare this received signal quality (such as: signal-to-jamming ratio (SIR)) with certain critical numerical value (that is: this target sir (SIR)).If this signal-to-jamming ratio (SIR) surpasses this critical numerical value, a through-put power order (TPC) just can transmit, and uses and reduces this power level.On the contrary, if too late this critical numerical value of this signal-to-jamming ratio (SIR), a through-put power order (TPC) then can transmit, and using increases this power level.Typically, this through-put power order (TPC) can utilize the data multitask of certain dedicated channel to this transmitter.In response in the through-put power order that receives, this transmitter just can change its transmission power level.
As usual, in a third generation cooperative programme (3GPP) communication system, this outer-loop power control algolithm can be supposed certain channel condition, and, utilize one group of fixing mapping between block error rate (BLER) and signal-to-jamming ratio (SIR), target block error rate (BLER) is as requested set the target sir (SIR) that begins that opens of each CCTrCH Coded Composite Transport Channel (CCTrCH).A CCTrCH Coded Composite Transport Channel (CCTrCH) is understood several transmission channels of multitask (TrCH) usually, use at certain to transmit various services above the physical radio channel, and various services all can be transmitted on the transmission channel (TrCH) of oneself.In order to carry out the accurate monitoring in block error rate (BLER) position according to the basis of CCTrCH Coded Composite Transport Channel (CCTrCH), this is considered in the multitask transmission channel (TrCH) of CCTrCH Coded Composite Transport Channel (CCTrCH) can select a reference transmission channel (RTrCH).For instance, transmission channel (TrCH-1) can be selected as this reference transmission channel (RTrCH), and, can be considered as above this CCTrCH Coded Composite Transport Channel (CCTrCH), all channel conditions (comprising: mid point additivity Gaussian noise (AGWN) channel).According to given channel condition, not matching and may significantly change between a target block error rate (BLER) and a target sir (SIR) is particularly under the situation of extremely low block error rate (BLER).For instance, when target block error rate (BLER) when equaling 0.01, the target sir (SIR) of the transmission channel (TrCH-1) of first situation (Case 1) channel condition, compared to the target sir (SIR) of another transmission channel of additivity Gaussian noise (AWGN) channel condition, may need to increase by 4 dB (that is: transmission channel (TrCH-1) can the stronger signal of needs).When this wireless transmission and receiving element (WTRU) desire are converted to this target block error rate (BLER) certain and open beginning target sir (SIR), this channel condition does not match just may cause an error, because the target sir (SIR) that certain target block error rate (BLER) needs can change along with the difference of channel condition.Therefore, the program of iterating of decision target sir (SIR) will occur one and open beginning difference, and it must converge to the target that needs, and, allow and carry out the Cyclic Redundancy Check program, and then make target sir (SIR) convergence a unfavorable delay occur.
Because the influence of this delay, the usefulness of whole power control algorithm will reduce.This delay can utilize the transfer rate unit, that is: Transmission Time Interval (TTI), represented.Minimum Transmission Time Interval unit is a data traffic frame, and in third generation cooperative programme (3GPP) communication system, this minimum Transmission Time Interval can be defined as 10ms usually.In a third generation cooperative programme (3GPP) communication system, the length of this Transmission Time Interval (TTI) is 10ms, 20ms, 40ms or 80ms.
In addition, a wireless channel can also transmit various services, and such as: video, voice, and data, wherein, various services all can have different service quality (QoS) requirement.For non real-time (NRT) data, services, data can utilize the burst between many short-terms to transmit.For instance, in a third generation cooperative programme (3GPP) communication system, these data burst meetings map to certain above the interim dedicated channel (Temp-DCH) in the transport block mode.This mapping action can also be called interim dedicated channel (Temp-DCH) setting.At each Transmission Time Interval (TTI), single or several transport blocks can map to this above interim dedicated channel (Temp-DCH).Therefore, each service can be shone upon in several Transmission Time Intervals (TTI), and, externally during the power loop control (OLPC), the target sir (SIR) that these interim dedicated channels (Temp-DCH) are provided with adjustment is carried out according to the basis of Transmission Time Interval (TTI).
When relatively voice and data type are transmitted, real-time (RT) voice transfer may need the preferable target block error rate (BLER) of tolerance (that is: block with higher error rate (BLER) numerical value), relatively, a non real-time (NRT) transfer of data then may need a target block error rate (BLER) that error rate is lower.Therefore, when data are downloaded, guarantee that the predicted delay of service quality (QoS) will be longer, compared to the predicted delay of voice transfer.In addition, transition stepping (transient step) size that needs that target sir (SIR) is adjusted can require according to the service quality (QoS) of this service to set.In real time (RT) data open the beginning target sir (SIR) always can converge to desirable target sir (SIR), with respect to this, non real-time (NRT) data open the beginning target sir (SIR), it is to assign again when being provided with in each interim dedicated channel (Temp-DCH), owing between the short-term that interim dedicated channel (Temp-DCH) is provided with, then may not can converge to desirable target sir (SIR).
In view of this, the present invention uses as the additional parameter that adds high power control during utilizing interim dedicated channel (Temp-DCH) to be provided with.
Summary of the invention
A kind of transmission power control method, be applicable to a wireless transmission and receiving element (WTRU), this wireless transmission and receiving element (WTRU) can utilize the block setting of selectivity size, in a forward channel, carry out the transmission of data-signal, wherein, this wireless transmission and receiving element (WTRU) are to carry out framework, use a function that makes the forward channel power modulation become the target metric system, this target metric system is based on these data-signals of receiving on this forward channel and calculates, in addition, this transmission power control method is to comprise the following steps.At first, on this forward channel, via this wireless transmission and receiving element (WTRU), the time receives a series of block setting with being separated by each other, and wherein, each block is provided with has a pre-sizing S respectively.For the data-signal of each block setting, the target metric system of the forward channel power adjustment of this wireless transmission and receiving element (WTRU) calculate be based on this above forward channel, the detecting of the predictive error condition of these received signals, comprise: one that sets each block setting is opened beginning target metric system numerical value, and, store the ideal metric system that each block is provided with.After first block was provided with, for the data-signal of each block setting, this opened that beginning target metric system numerical value can be set at the ideal metric system of previous block setting and based on previous block the function that adjustment is set mutually of blanking time being set.After this opens one period at initial stage of beginning numerical value, this target metric system, in the time interval with a predetermined length, can change upwards a step number or a downward step number, by this, this target metric system can increase this step number that makes progress, if directly the time interval has detected a predictive error condition the preceding, perhaps, this target metric system can reduce this downward step number, if directly the time interval does not detect this predictive error condition the preceding.This downward step number is set in a transient state position standard to be based on this predetermined block big or small S is set, by this, this opens downward step number of beginning can be set in a position standard, and this standard is not less than a predetermined downward step number of the stable state position standard of a stable state at least.When this opens downward step number of beginning greater than the predetermined downward step number of the stable state position standard of this stable state, this downward step number can reduce a selected numerical value to one than low level, if directly the time interval has detected a predictive error condition the preceding, can be reduced to the predetermined downward step number of the stable state position standard of this stable state up to this downward step number.
A kind of reception wireless transmission and receiving element (WTRU), in order to implement the through-put power control of a transmission wireless transmission and receiving element (WTRU), wherein, this transmission wireless transmission and receiving element (WTRU) can utilize the block setting of selectivity size, each block setting has a pre-sizing S, in a forward channel, carry out the transmission of data-signal, wherein, this transmission wireless transmission and receiving element (WTRU) are to carry out framework, use a function that makes the forward channel power modulation become the target metric system, this target metric system is to utilize this reception wireless transmission and receiving element (WTRU) to calculate.This receives wireless transmission and receiving element (WTRU) is to have following assembly.One receiver is on this forward channel, and via this wireless transmission and receiving element (WTRU), the time receives a series of block setting with being separated by each other.One processor is to carry out framework, use and calculate the target metric system, its be based on this above forward channel, the detecting of the predictive error condition of these received signals, implement forward channel through-put power of this transmission wireless transmission and receiving element (WTRU) and adjust.This processor can also carry out framework, uses and calculates the target metric system, so, for the data-signal of each block setting, each block setting is can set one to open beginning target metric system numerical value, and each block setting is to store an ideal metric system numerical value.In addition, this processor is framework further, by this, after first block is provided with, for the data-signal of each block setting, this opens that beginning target metric system numerical value can be set at the ideal metric system of previous block setting and based on previous block the function that adjustment is set mutually of blanking time being set.After this opens one period at initial stage of beginning numerical value, this target metric system, in the time interval with a predetermined length, can change upwards a step number or a downward step number, by this, this target metric system can increase this step number that makes progress, if directly the time interval has detected a predictive error condition the preceding, perhaps, this target metric system can reduce this downward step number, if directly the time interval does not detect this predictive error condition the preceding.This downward step number is based on this predetermined block big or small S is set, use and be set in a transient state position standard, so, this opens downward step number of beginning can be set in a position standard, this standard is not less than a predetermined downward step number of the stable state position standard of a stable state at least, and, when this opens downward step number of beginning greater than the predetermined downward step number of the stable state position standard of this stable state, this downward step number can reduce a selected numerical value to one than low level, if directly the time interval has detected a predictive error condition the preceding, can be reduced to the predetermined downward step number of the stable state position standard of this stable state up to this downward step number.
Description of drawings
Fig. 1 is the system architecture overview diagram of expression a kind of known Universal Mobile Telecommunications System (UMTS) network;
Fig. 2 is the schematic diagram of a kind of known open-loop power control system of expression, is used for a wireless communication system, and it is to implement outer-loop power control via a target sir (SIR) metric system;
Fig. 3 is the schematic diagram of a kind of known closed loop power control system of expression, is used for a wireless communication system, and it is to implement the control of home loop power via a target sir (SIR) metric system;
Fig. 4 is the schematic diagram that expression target sir (SIR) is adjusted, and it is the jump algorithm that can be applied in descending open-loop power control (OLPC) according to a kind of;
Fig. 5 is the schematic diagram that the target sir (SIR) of expression descending open-loop power control of example wireless transmission and receiving element (WTRU) (OLPC) according to the present invention is adjusted;
Fig. 6 is the schematic diagram that the target sir (SIR) of expression descending open-loop power control of example wireless transmission and receiving element (WTRU) (OLPC) according to the present invention is adjusted, wherein, the descending open-loop power control of this wireless transmission and receiving element (WTRU) (OLPC) has a compressive transient state;
Fig. 7 A to Fig. 7 C is the method flow diagram of the expression descending open-loop power control of example (OLPC) algorithm according to the present invention; And
Fig. 8 is the method flow diagram of expression according to reinforcement open-loop power control (OLPC) algorithm of non-real-time data of the present invention.
Embodiment
The present invention joins appended graphic detailed description, and wherein, similarly diagrammatical symbol is an assembly like the representation class.Base station (BS), wireless transmission and receiving element (WTRU), and term such as mobile unit be to have broad sense.In the present invention's explanation, term " base station " be including, but not limited to base station, B node, positioner, access point, maybe can operate in other interface arrangement of a wireless environment, use making the connection network that wireless transmission and receiving element (WTRU) can this base station of wireless access.
In addition, in the present invention explanation, term " wireless transmission and receiving element (WTRU) " is including, but not limited to user's equipment (UE), mobile radio station, fixing or moving user unit, beeper, maybe can operates in any other types of devices of a wireless environment.Wireless transmission and receiving element (WTRU) they are to have personal communicator, such as: phone, visual telephone and have the world-wide web phone that network connects.In addition, wireless transmission and receiving element (WTRU) also have the Portable personal computing device, such as: PDA(Personal Digital Assistant) and have the mobile computer of radio modem (having the similar network function).Wireless transmission and receiving element (WTRU) that portability maybe can change the position can be called mobile unit.
Though preferred embodiment of the present invention is to cooperate third generation cooperative programme (3GPP) Wideband-CDMA (W-CDMA) system of time division duplex (TDD) pattern to describe, but preferred embodiment of the present invention can also be applicable to that any mixing code division multiple access (CDMA)/time-division multiple inserts (TDMA) communication system.In addition, preferred embodiment of the present invention can also be applicable to other code division multiple access (CDMA) system, such as: third generation cooperative programme (3GPP) Wideband-CDMA (W-CDMA) system of frequency division duplexing (FDD) pattern.
Wireless communication system (such as: known Poewr control method third generation cooperative programme (3GPP) wireless communication system) is to use so-called home loop and external circuit.According to this home loop opening and closing of fault whether, this power control system can be called open power control system or circulating power control system.In addition, the external circuit of these two kinds of system types all is loops.
Fig. 2 is the relevant portion of a kind of open-loop power control system of expression, and it is to have " transmission " communication station 10 and " reception " communication station 30.Two communication stations 10,30 all are transceivers.Typically, a communication station is the expression base station, it can be called the B node in third generation cooperative programme (3GPP) system, and, another communication station is the wireless transmission and receiving element (WTRU) type of one type of expression, and it can be called user's equipment (UE) in third generation cooperative programme (3GPP) system.For for purpose of brevity, the present invention only represents the assembly selected, and the present invention cooperates third generation cooperative programme (3GPP) system to describe.But, the present invention can also be applied to other wireless communication system, even carry out the system that ad hoc network connects, wherein, wireless transmission and receiving element (WTRU) can communicate to each other.Under the situation that does not cause extra interference, power control is to keep the key factor that multiple user's quality signals sends.##
This transport communication station 10 has a transmitter 11, and wherein, this transmitter 11 has a data circuit 12, uses user's data-signal of transmission.This user's data-signal is to have a desirable power level, and this power level is an output 13 via a processor 15, applies a through-put power adjustment to adjust.This user's data-signal is to transmit via an antenna system 14 of this transmitter 11.
A wireless signal 20 that comprises these transmission data is via a reception antenna system 31, utilizes this received communication station 30 to receive.This reception antenna system 31 also may receive and disturb wireless signal 21, and then influences the quality that this receives data.This received communication station 30 is to have an interference power measuring equipment 32, in order to importing this received signal, and, the interference power data that output measures.This received communication station 30 also has a data quality measuring equipment 34, in order to importing this received signal, and, export a data quality signal.This quality of data measuring equipment 34 is to be coupled to a processing unit 36, uses to receive these signal quality data, and, define quality standard parameter (receiving) based on a user via an input 37, calculate target sir (SIR) data.
This received communication station 30 also has a transmitter 38, and it is to be coupled to this interference power measuring equipment 32 and this target sir (SIR) generation processor 36.The transmitter 38 at this received communication station 30 also has input 40,41,42, and it is to receive user's data, reference signal, and reference signal transmission power data respectively.This received communication station 30 is via an associate antenna system 39, uses transmission user's data and control related data and reference signal.
This transport communication station 10 is to have a receiver 16 and an associate antenna system 17.The receiver 16 at this transport communication station 10 is the wireless signals that received this transmission by this received communication station 30, and it is to have user's data 44 at this received communication station 30 and control signal and the data 45 that this received communication station 30 produces.
The transmitter processor 15 at this transport communication station 10 is to close the receiver 16 that is connected in this transport communication station 10, uses and calculates a through-put power adjustment.This transmitter 11 also has a device 18, use to measure to receive reference signal power, and this device 18 is to close to be connected in pathloss calculation circuit 19.
In order to calculate this through-put power adjustment, this processor 15 is to receive data by a signal-to-jamming ratio (SIR) data input 22, this input 22 is that the target sir (SIR) at this received communication station 30 of carrying produces target sir (SIR) data that processor 36 produces, and, receive data by an interference power data input 23, this input 23 is interfering datas that the interference power measuring equipment 32 at this received communication station 30 of carrying produces, and, receive data by path loss data defeated 24, this input 24 is path loss signal of these pathloss calculation circuit 19 outputs of carrying.This path loss signal is to utilize this pathloss calculation circuit 19, and by the reception data generation of a reference signal transmission power data input 25, this input 25 is the output of the reference signal power measuring equipment 18 of this transmitter 11 of carrying.This reference signal measuring equipment 18 is the receivers 16 that are coupled to this transport communication station 10, uses the power that measures this reference signal (transmitter 38 by this received communication station 30 receives).This pathloss calculation circuit 19 preferably based on the difference between known reference power signal intensity (being transmitted by input 25) and measurement received power intensity (being transmitted by input 26), is used this path loss of decision.
Interference power data, reference signal power data, and target sir (SIR) numerical value can be sent to this transport communication station 10, its speed is significantly less than the time fluctuation speed of transmitting channel and interference.This " inside " loop is to rely on this to measure the part system that disturbs.Because this algorithm, transmit suitable speed, and the minimum prediction order of accuarcy that needs through-put power speed and interference of expression of the time fluctuation speed of channel at this, feedback not, this system can be called " open loop ".If need transmission power level to change fast, then this system can't in response to, use this power adjustment of timely change.
According to the external circuit of Fig. 2 open-loop power control system, at long-range received communication station 30, this quality that receives data can be estimated via this measuring equipment 34.The typical metric system of digital data quality is potential difference rate (BBER) and block error rate (BLER).The calculating of these metric systems needs the cumulative data of certain time cycle, and wherein, this time cycle is the remarkable cycle greater than time fluctuation transmission and interference.For any given metric system, all can have a theory relation between this metric system and the received signal interference ratio (SIR).When this remote receiver has been accumulated enough data when estimating this metric system, this metric system will utilize processor 36 to calculate, and, compare with this desirable metric system (representing desirable service quality (QoS)), use an output target sir of upgrading (SIR).This target-to-jammer ratio that upgraded (SIR) numerical value when being applied to the home loop of this transmitter, can make this measured metric converge to desirable numerical value in theory.At last, this target sir of upgrading (SIR) via the transmitter 38 at this received communication station 30 and the receiver 16 at this transport communication station 10, can be sent to this transmitter 11, uses to be used for its home loop.The renewal rate of target sir (SIR) can be subject to the actual transmission rate upper limit that needs time and power control transmission device of accumulation statistics of attributes.
Please refer to Fig. 3, it is a kind of communication system of using the closed loop power control system of expression, and wherein, this communication system is to have a transport communication station 50 and a received communication station 70.
This transport communication station 50 has a transmitter 51, and wherein, this transmitter 51 has a data circuit 52, uses user's data-signal of transmission.This user's data-signal is to have a desirable power level, and this power level is an output 53 via a processor 55, applies a through-put power adjustment to adjust.This user's data-signal is to transmit via an antenna system 54 of this transmitter 51.
A wireless signal 60 that comprises these transmission data is via a reception antenna system 71, utilizes this received communication station 70 to receive.This reception antenna system 71 also may receive and disturb wireless signal 61, and then influences the quality that this receives data.This received communication station 70 is to have an interference power measuring equipment 72, in order to importing this received signal, and, signal-to-jamming ratio (SIR) data that output measures.This received communication station 70 also has a data quality measuring equipment 73, in order to importing this received signal, and, export a data quality signal.This quality of data measuring equipment 73 is to be coupled to a processor 74, uses to receive these signal quality data, and, define quality standard parameter (receiving) based on a user via an input 75, calculate target sir (SIR) data.
A combiner 76 (preferably subtracter) can compare measurement signal interference ratio (SIR) data of (preferably subtracting each other) this device 72 and calculating target sir (SIR) data of this processor 74, uses an output signal-to-jamming ratio (SIR) error signal.The signal-to-jamming ratio of this combiner 76 (SIR) error signal can input to treatment circuit 77, uses to produce upwards step command/downward step command.
This received communication station 70 also has a transmitter 78, and wherein, this transmitter 78 is to be coupled to this treatment circuit 77.The transmitter 78 at this received communication station 70 also has the input 80 of user's data.Its user's data of transmission and control related data can be used via an associate antenna system 79 in this received communication station 70.
This transport communication station 50 also has the reception antenna system 57 of a receiver 56 and a connection.The receiver 56 at this transport communication station 50 can receive the transmitting wireless signals at this received communication station 70, and it is to comprise user's data 84 at this received communication station 70 and the control data 85 that this received communication station 70 produces.
The transmitter processor 55 at this transport communication station 50 is to have an input 58, and it is to close the receiver 16 that is connected in this transport communication station 50.This processor 55 is to receive upwards command signal/downward command signal via this input 58, uses and calculates these through-put power adjustment.
Please refer to the home loop of this closed loop power control system, the transmitter at this transport communication station 50 51 can make progress step command and downward step command (being produced by this long-range received communication station 70) with setting power based on two-forty.At this long-range received communication station 70, this signal-to-jamming ratio (SIR) that receives data can utilize this measuring equipment 72 to measure, and, utilize this combiner 76, use the target sir (SIR) that produces with this processor 74 and compare.This signal-to-jamming ratio (SIR) numerical value, tentation data are to utilize this numerical value to receive, and can obtain a desirable service quality (QoS) in theory.If the received signal interference ratio (SIR) of this measurement is less than this target sir (SIR), this treatment circuit 77, via the transmitter 78 at this received communication station 70 and the receiver 56 at this transport communication station 50, will issue the step command that makes progress to this transmitter 51.Otherwise this treatment circuit 77 via the transmitter 78 at this received communication station 70 and the receiver 56 at this transport communication station 50, then can be issued a downward step command to this transmitter 51.Because the two-forty of this make progress step command and this downward step command feedback, it can be in real time in response to the transmission channel and the interference of this time fluctuation, and this power control system can be called loop.If need transmission power level because time fluctuation disturbs and transmit and change, this power Adjustment System can be fast in response to, and adjust through-put power according to this.
According to the external circuit of Fig. 3 closed loop power control system, at this received communication station 70, this quality that receives data can be estimated via this measuring equipment 73.The typical metric system of digital data quality is bit error rate (BER) and block error rate (BLER).The calculating of these metric systems needs the cumulative data of certain time cycle, and wherein, this time cycle is the remarkable cycle greater than time fluctuation transmission and interference.For any given metric system, all can have a theory relation between this metric system and the received signal interference ratio (SIR).When this remote receiver has been accumulated enough data when estimating this metric system, this metric system will utilize processor 74 to calculate, and, compare with this desirable metric system (representing desirable service quality (QoS)), use an output target sir of upgrading (SIR).This target-to-jammer ratio that upgraded (SIR) numerical value when putting on this receiver algorithm, can make this measured metric converge to desirable numerical value in theory.Subsequently, this target sir of upgrading (SIR) can be applied in this home loop, use the direction of this step command that makes progress of decision/downward step command, its power scale that can be sent to this transport communication station 50 produces processor 55, uses the power of this transmitter 51 of control.
For outer-loop power control, no matter execution mode is open loop system shown in Figure 2 or closed circuit system shown in Figure 3, one is opened beginning target metric system, such as: target sir (SIR), all can set, subsequently, this opens beginning target metric system and can use and recomputate based on the feedback of the external circuit during the radio communication.Known, the adjustment of this target metric system is to utilize fixedly that stepping method reaches, and wherein, upwards stepping and downward stepping are the setting incremental changes, use converging to a desirable target.
The present invention changes this prior art method, uses the target sir (SIR) that begins that opens of decision non real-time (NRT) data.For instance, the wireless transmission of a kind of third generation cooperative programme (3GPP) system and receiving element (WTRU), when Radio Link is installed beginning or shifted, will utilize following conditionity step:
(1) less than certain critical numerical value (for instance as if (or the big or small S of Transmission Time Interval (TTI)) during the setting of the first interim dedicated channel (Temp-DCH), a predetermined convergence time target) time, one is opened beginning target sir (SIR) and can open the beginning by one and obtain in the mapping look-up of table, and, be offset a numerical value (2*log for instance, 10(1/BLER)).The decision of this shift value is based on the variance of the channel condition that successively decreases.For instance, if the channel condition that successively decreases is a high flexibility, then this shift value will adjust upward.This descending outer-loop power control can't be adjusted this and open beginning target sir (SIR) (that is: the target sir (SIR) of this interim dedicated channel (Temp-DCH) can be fixed on this and open beginning target sir (SIR)).This descending home loop power control (ILPC) will normally be carried out, and uses fast quick depletion of compensation and systematic measurement offset error.Generally speaking, this descending home loop power control (ILPC) can't comprise the action that target sir (SIR) is adjusted.
(2) if the first interim dedicated channel (Temp-DCH) setting during greater than certain critical numerical value (for instance, this predetermined convergence time target) time, one is opened beginning target sir (SIR) and can open the beginning by one and obtain in the mapping look-up of table, and this descending power control is normal running.
(3) when the target sir that previous service can be provided (SIR) changes (that is: actual measure that target sir (SIR) deducts radio network controller (RNC) open beginning target sir (SIR)), of new service opens the mean change (but not above-mentioned steps (1) and (2)) that beginning target sir (SIR) will be possible to use target sir (SIR) and adjusts.The pinpoint accuracy of the outer-loop power of service control so, before just can be apt to use.
After this opened beginning target sir (SIR) setting, this descending outer-loop power control program can be used one " jump algorithm ", and the cyclic redundancy result that it is based on these data uses and adjusts a target sir (SIR).Fig. 4 is the use legend of a kind of jump algorithm commonly used of expression.In target sir (SIR), when each Transmission Time Interval (TTI) began, each make progress stepping and downward stepping were relatively-stationary step size adjustment.Each Transmission Time Interval (TTI) preferably can be carried out a Cyclic Redundancy Check, and each Cyclic Redundancy Check that does not have error will be carried out downward stepping adjustment.With respect to this, each Cyclic Redundancy Check with error then can be carried out upwards stepping adjustment.
In preferred embodiment of the present invention, basic jump algorithm can utilize following equation to calculate.If k block of this Cyclic Redundancy Check do not detect an error, then
Target_SIR (k)=target_SIR (k-1)-SD (dB) equation (1)
Otherwise, if a Cyclic Redundancy Check error takes place, then
Target_SIR (k)=target_SIR (k-1)+SU (dB) equation (2)
Wherein, the stepping (SD) downwards and the stepping (SU) that makes progress are to utilize following equation to calculate.
SD=SS*target_BLER equation (3)
SU=SS-SD equation (4)
Wherein, SS is a step size of adjusting target sir (SIR), and the step size change that it will cooperate the preferred embodiment according to the present invention is described in detail as follows.
The control of descending outer-loop power has three kinds of states usually, that is: initial stage home loop shakedown, transient state, and stable state.Fig. 5 is expression, during different descending outer-loop power state of a controls, according to target sir of the present invention (SIR) method of adjustment.The descending outer-loop power of a kind of adjustment, the method and system of using controlled target signal-to-jamming ratio (SIR) are found in international application number PCT/US 03/28412 (applying date is September 10 2003), its corresponding U.S. patent application case number 10/659673 (applying date is September 10 2003), and, allow the people be had by identical awarding of the present invention.
As shown in Figure 5, in whole home loop shakedown, target sir (SIR) is preferably kept fixing.In this home loop shakedown, this home loop through-put power order (TPC) algorithm does not need to change and opens beginning target sir (SIR), just can proofread and correct this and open beginning systematic error and error in measurement at random.
In this transient state, this outer-loop power control algolithm can attempt proofreading and correct target sir (SIR) error that begins that opens that this channel condition does not match and caused.At first, in this transient state, this jump algorithm preferably can be used a bigger downward stepping, uses this target sir of quick reduction (SIR), that is: force a Cyclic Redundancy Check error takes place.In this stable state, this outer-loop power control algolithm can be utilized less relatively downward stepping, uses and attempts keeping a target sir (SIR).In preferred embodiment of the present invention, the feature of the descending open-loop power control of this wireless transmission and receiving element (WTRU) (OLPC) is the relatively little stepping that the big relatively stepping of this transient state is transitted to this stable state.In addition, another feature of preferred embodiment of the present invention is the step size that increases this stable state, when in the predetermined period Cyclic Redundancy Check error not taking place.
In this transient state, reference transmission channel (RTrCH) hereto, Da Qi beginning stepping SS TSBe passable, for instance, based on the N of this target block error rate (BLER) and each Transmission Time Interval (TTI) BIndividual transport block, utilize following equation to calculate:
SS TB=2 (log 10(1/BLER_target))/N B(dB) equation (5)
For instance, work as BLER_target=10 -2And N B=2 o'clock, SS TS=2.Subsequently, according to previous described equation (3) and equation (4), this transient state open the beginning downward stepping numerical value SD TAnd open beginning stepping numerical value SU upwards TBe to calculate, that is: SD T=0.02, and, SU T=(2-0.02)=1.98.
The generation of Cyclic Redundancy Check error can trigger dwindling of step size, converges to the step size SS of this stable state up to the step size of this transient state SSIn this example, the step size SS of this stable state SSPreferably utilize following equation to calculate:
SS SS=0.25 (log 10(1/BLER_target))/N B(dB) equation (6)
The preferably, when a Cyclic Redundancy Check error appearred in certain Transmission Time Interval (TTI) of this transient state, this step size preferably can reduce by 1/2.Subsequently, the step size of this reduction is to be applied to this jump algorithm.This program can iterate, and can converge to the step size of this stable state up to new step size.In above-mentioned example, after convergence can occur in and iterate for three times, because SS TS=2 3* SS SSTherefore, during this transient state, for each Transmission Time Interval (TTI) with Cyclic Redundancy Check error, next step size preferably can reduce by 1/2 by opening the beginning step size n, wherein, n is Transmission Time Interval (TTI) number that is begun, comprised at least one Cyclic Redundancy Check error by this transient state, can converge to the step size of this stable state up to new step size.When convergence took place, this stable state just can reach, and also dwindling of step size can further do not carried out.
Fig. 5 is that the practice of the above-mentioned example of expression is graphic.When the first Cyclic Redundancy Check error took place the A point, this target sir (SIR) can increase by half transient state stepping SU that makes progress T/ 2.This Cyclic Redundancy Check error also can cause the adjustment of downward step size; There is not the subsequent transmission block of Cyclic Redundancy Check error will make target sir (SIR) reduce SD T/ 2.When next Cyclic Redundancy Check error took place, this step size that makes progress can be adjusted to SU T/ 4, target sir (SIR) can increase equal number, and step size also can be adjusted to SD downwards T/ 4.This algorithm can continue to carry out, up to this adjusted upwards step size SU TCan equal the upwards step size SU of stable state S, it is to equal SU in the example of Fig. 5 and Fig. 6 T/ 8.At this moment, stable state just can reach.In addition, these make progress step size and downward step size also can be separately fixed at SU SAnd SD S
When entering this transient state, when detecting the Cyclic Redundancy Check error continuously, the convergence of stable state is quite quick.Fig. 6 is the graphic of the above-mentioned example of expression, and wherein, entering after this transient state is several transport blocks with Cyclic Redundancy Check error to occur, therefore, in this target sir (SIR), the upwards stepping SU of transient state TBe that successional reduction takes place.As shown in Figure 6, this opens beginning Cyclic Redundancy Check result is the error that expression A is ordered, and it may make target sir (SIR) increase SU T/ 2, and, downward step size is set at SD T/ 2.Fig. 6 can also represent that after increasing this target sir (SIR), the first Cyclic Redundancy Check result represents the possibility of an error.In the example shown in the B point, this target sir (SIR) can increase once again, but only increases SU T/ 4.Continue the poorest this situation, a Cyclic Redundancy Check error takes place in the 3rd Transmission Time Interval (TTI) of this transient state once again.The upwards stepping adjustment of next target sir (SIR) can become SU T/ 8.Step size equals the predetermined upwards step size SU of this stable state because this makes progress S, this transient state can finish at this point, and, begin to carry out stable state.This target sir (SIR) therefore, can increase SU S=SU T/ 8, and this downward step size can be set at SD S=SD T/ 8.Generally speaking, no matter when any Cyclic Redundancy Check error takes place, and all can increase target sir (SIR), and it is accelerated is that half is in before accelerating.
After entering stable state, this make progress step size and this downward step size can maintain SU respectively SAnd SD STypically, when a little variations took place the communication metric system, this stable state algorithm can be according to the regular pattern (not shown), produced a series of stage that makes progress continuously to order and order to the next stage.Yet when this communication, owing to disturb or other factors changes, when facing the quick change of operating condition, the stable state algorithm will not be inconsistent efficient.Therefore, this stable state can change in time, uses the fast-changing condition that meets.
During stable state, when the Cyclic Redundancy Check error not occurring in the predetermined viewing duration, this preferably can increase automatically to the next stage size.For instance, as Fig. 5 and shown in Figure 6, when any Cyclic Redundancy Check error did not appear in eight Transmission Time Intervals (TTI), this downward step size can double temporarily, use make the 8th and back continuously downwards step size become the SD of twice SQuantity.
The preferably, this observation cycle can be longer relatively, because this target sir (SIR) can be assumed to be convergence soon.The preferably, this observation cycle can be set at the continuous transport block of 5/BLER.This downward stepping numerical value 2SD SCan keep fixingly, up to another Cyclic Redundancy Check error takes place, at this moment, this downward stepping numerical value can be back to SD SWhen channel condition improved suddenly, this way can be improved convergence time, and, cause an extra signal-to-jamming ratio (SIR) that measures, compared to desirable target sir (SIR).This stable state can continue in the whole life of this CCTrCH Coded Composite Transport Channel (CCTrCH) communication, and in the time incremental change of Cyclic Redundancy Check error (equaling the observation cycle) not occurring, carries out this class adjustment.
Perhaps, when any Cyclic Redundancy Check error does not appear in certain predetermined observation cycle, this program can be returned this transient state with the reduction convergence time, and (utilizing said method) enters stable state once again when this target sir (SIR) restrains.In this class example, this downward stepping numerical value can be by SD SSwitch to SD TS(as previous definition), and, incrementally reduce to stable state numerical value subsequently, if detect the Cyclic Redundancy Check error.
For the reference transmission channel (RTrCH) of certain CCTrCH Coded Composite Transport Channel (CCTrCH), and in each Transmission Time Interval (TTI) is received the example of a more than transport block (that is: N B＞1), this target sir (SIR) preferably utilizes following equation to adjust:
target_SIR＝current_target_SIR+(SU*N E)-SD *(N B-N E)
Equation (7)
Wherein, N EBe to be defined as the Cyclic Redundancy Check error number of this reference transmission channel (RTrCH) at each Transmission Time Interval (TTI).Yet, this step size preferably only can be adjusted once at each Transmission Time Interval (TTI), it is the beginning that is positioned at each Transmission Time Interval (TTI), and, only can be in the Transmission Time Interval with at least one Cyclic Redundancy Check error (TTI).
Previous described external circuit algorithm preferably can be implemented in the processor that calculates this target sir (SIR), such as: the processor 36 of open loop system shown in Figure 2 and the processor 74 of closed circuit system shown in Figure 3.The implementation method of this algorithm is any Cyclic Redundancy Check error whether to occur in the new Transmission Time Interval of decision (TTI), suitably adjust upwards step size and downward step size, and, based on indivedual Cyclic Redundancy Check results, apply these stepping adjustment.For instance, consider and have four transport blocks (that is: N B=4) Transmission Time Interval (TTI), wherein, three transport blocks are to have a Cyclic Redundancy Check error.Before this Transmission Time Interval (TTI), if this step size that makes progress is SU T/ 2, and this downward step size is SD T/ 2, then this external circuit algorithm is at first adjusted these steppings and is adjusted to SU T/ 4 and SD T/ 4, and then suitably upgrade this target sir (SIR).Net result is to be expressed as: adjusted target_SIR=current_target_SIR+3 (SU T/ 8)-(SD T/ 8).
For a third generation cooperative programme (3GPP) system, in this transient state and this stable state, if this reference transmission channel (RTrCH) is to reselect (for instance, the service of different bit rate), and, the target block error rate (BLER) of new reference transmission channel (RTrCH) is different from the target block error rate (BLER) of old reference transmission channel (RTrCH), and then this signal-to-jamming ratio (SIR) step size will recomputate according to fresh target block error rate (BLER).In stable state, this observation cycle also must upgrade, and, there is not the present block count of error also must be set at 0.In transient state, except recomputating step size, extra adjustment can also compensate the convergence that this state has taken place.In other words, this open the beginning upwards stepping numerical value SU or downwards stepping numerical value SD will can not apply, on the contrary, the adjustment of detecting Cyclic Redundancy Check error then can apply.As discussed previously, partly upwards the downward stepping numerical value of stepping numerical value and part is to utilize the factor 1/2 nCalculate, wherein, n is after this transient state, comprises Transmission Time Interval (TTI) number of a Cyclic Redundancy Check error at least.For instance, if the downward stepping numerical value before the gravity treatment reference transmission channel (RTrCH) is SD Told/ 4, the later downward stepping numerical value of then gravity treatment reference transmission channel (RTrCH) must be set at SD Tnew/ 4, and this stepping numerical value that makes progress must be set at SU Tnew/ 4.
Fig. 7 A to Fig. 7 C is the implementing procedure figure of the descending outer-loop power control algolithm of expression third generation cooperative programme (3GPP) system.In Fig. 7 A, the first order 300 is preferable programs of expression home loop shakedown.In step 302, home loop setting time, transient state step size SS TS, stable state stepping size SS SS, and the parameter of Transmission Time Interval (TTI) initialized.This home loop setting time preferably is set at 100ms.Transient state step size and stable state stepping size SS TSNumerical value be to initialize according to equation (6) and equation (7).The duration of this Transmission Time Interval (TTI) counting is to be set at 0.
In step 304, compare this product (Transmission Time Interval (TTI) counting multiply by Transmission Time Interval (TTI) length) and home loop setting time.If this product is greater than this home loop setting time, then this shakedown is to finish, and this power control algorithm can advance to this transient state.If this product is less than this home loop setting time, then this Transmission Time Interval (TTI) counting can increase progressively 1 in step 306, and this shakedown can be returned step 304 to carry out another time comparison.So, this algorithm first order 300 is can treadle-operated tilt hammer for hulling rice to protect, and enough Transmission Time Intervals (TTI) pass through, and by this, this home loop control control just can be proofreaied and correct and be opened beginning systematic error and error in measurement at random.
In Fig. 7 B, the second level 307 is to represent during this transient state, the preferable program of descending outer-loop power control.Step 308 is to utilize the sure decision of the step 304 of Fig. 7 A part flow process to initialize.In step 308, these transient state parameters can initialize.This step size preferably is set at SS according to equation (5) TS, the downward step size of this transient state be this step size multiply by this block error rate (BLER) numerical value (that is: SD T=BLER*SS TS), and, this transient state step size SU that makes progress TBe step size SS TSAnd downward step size SD TBetween difference (that is: SU T=SS TS-SD T).
In step 310, compare this step size SS TSAnd the step size SS of this stable state SSThis step size SS TSOpen the beginning numerical value be according to equation (6), and, in step 302 decision.In step 310, determine this step size SS TSWhether greater than the step size SS of this stable state SSIf not, then this transient state is fully, and this algorithm can advance to the step 320 of Fig. 7 C part flow process.If then this method can advance to step 312, use the number N of checking Transmission Time Interval (TTI) Cyclic Redundancy Check error EWhether be at least one.If not, then this method can advance to step 318, uses to successively decrease according to following equation that this echo signal is dried helps than (SIR):
Target_SIR=current_target_SIR-SD T* N BEquation (8)
In step 318, target sir (SIR) can be set at least one minimum value MIN_DL_SIR.That is to say that less than predetermined value MIN_DL_SIR, then this target sir (SIR) will equal this minimum value as if target sir (SIR).After step 318 was finished, this program was that the target sir (SIR) that will newly reduce is back to step 310.
Get back to step 312, if Transmission Time Interval (TTI) detects a Cyclic Redundancy Check error at least at present, step size SU then makes progress TAnd downward step size SD TCan in step 314, adjust.This transient state step size SS TSCan be set at step size SS half TSThese step size SU that make progress TAnd downward step size SD TNumerical value can utilize the new step size SS of transient state according to equation (3) and (4) TSReadjust.
In step 316, this target sir (SIR) can be increased according to following equation:
target_SIR＝current_target_SIR+(SU T*N E)-SD T(N B-N E)
Equation (9)
This new target sir (SIR) numerical value must be checked and be not more than predetermined greatest measure MAX_DL_SIR.If new target sir (SIR) is greater than greatest measure, then new target sir (SIR) can be set at this maximum MAX_DL_SIR.This transient state can continue to return step 310, and repetitive cycling is up to the step size of transient state size greater than stable state.
In Fig. 7 C, the third level 319 is preferable programs of the stable state part of the descending outer-loop power control of expression.In step 320, the parameter of this stable state comprises: signal-to-jamming ratio (SIR) step size and the stable state stepping numerical value SU that makes progress SBe to adjust.This signal-to-jamming ratio (SIR) step size is the stable state stepping size SS that is set at step 302 decision SSThis stepping numerical value SU that makes progress SBe according to equation (3), utilize stable state level size SS SSCalculate.In step 322, whether observation cycle is to check more than or equal to 5/BLER.At first, this observation cycle is less than 5/BLER, and in this case, step 324 is beginnings, wherein, and downward step size numerical value SD SBe to equal product BLER*SS SS
In step 328, check whether this Transmission Time Interval (TTI) detects a Cyclic Redundancy Check error at least.If step 330 is beginnings, wherein, target sir (SIR) is to increase according to the following formula equation:
target_SIR＝current?target_SIR+(SU S*N E)-SD S(N B-N E)
Equation (10)
Owing to detect a Cyclic Redundancy Check error, this observation cycle is to be reset to zero.If new target sir (SIR) is greater than numerical value MAX_DL_SIR, new target sir (SIR) will be set at numerical value MAX_DL_SIR.Otherwise this target sir (SIR) can maintain the numerical value that equation (10) is calculated.This program can be back to step 322, uses this observation cycle of inspection.When this observation cycle during more than or equal to 5/BLER, step 326 can beginning, wherein, and stepping numerical value SD downwards SCan double.This program can advance to step 328 subsequently, uses and checks the Cyclic Redundancy Check error.If do not detect the Cyclic Redundancy Check error, then step 332 can begin, and wherein, this target sir (SIR) can increase according to following equation.
Target_SIR=current_target_SIR-(SD S* N B) equation (11)
If new target sir (SIR) numerical value is less than minimum value MIN_DL_SIR, then this new target sir (SIR) can be set at minimum value MIN_DL_SIR.Otherwise this target sir (SIR) can maintain the numerical value that equation (11) is calculated.After step 332, this algorithm level 319 can be back to step 322, and this algorithm 319 can repeat, and no longer acts on up to this CCTrCH Coded Composite Transport Channel (CCTrCH).
Particularly in non real-time (NRT) transfer of data that interim dedicated channel (Temp-DCH) is provided with, following explanation is to sum up interim dedicated channel (Temp-DCH) setting, after first Transmission Time Interval (TTI), preferable program.This opens beginning target sir (SIR) is to be calculated by last target sir (SIR) that previous interim dedicated channel (Temp-DCH) is provided with.This open beginning target sir (SIR) numerical value on be limited to this and open beginning target sir (SIR) (opening the beginning mapping look-up of table by this obtains) and add a upper limit border, and, this open beginning target sir (SIR) numerical value on be limited to this and open beginning target sir (SIR) (obtaining) and deduct a lower limit border by this beginning mapping look-up of table.This opens beginning target sir (SIR) and can also adjust based on data transfer rate and block error rate (BLER) that new interim dedicated channel (Temp-DCH) be provided with needs.Oversize (for instance in the mutual time of advent that interim dedicated channel (Temp-DCH) is provided with requirement, in the time of 10s), the linear combination of the limited target signal-to-jamming ratio (SIR) that opens beginning target sir (SIR) and previous interim dedicated channel (Temp-DCH) setting of a radio network controller (RNC), arrange in pairs or groups suitable weights (that is: the factor that compensates the mutual time of advent), can also use.When this opens beginning target sir (SIR) final decision, it comprises the various adjustment that given interim dedicated channel (Temp-DCH) is provided with, this target sir (SIR) numerical value, during the outer-loop power control operation that this interim dedicated channel (Temp-DCH) is provided with, to can not surpass or be lower than this and open beginning target sir (SIR) numerical value, reach given border.
Fig. 8 is the flow chart that a kind of algorithm 500 is implemented in expression, wherein, this algorithm 500 is that application target signal-to-jamming ratio (SIR) historical data is controlled to improve descending outer-loop power, and it is specially adapted to non real-time (NRT) the data setting of interim dedicated channel (Temp-DCH).This program is to select a kind of transient state step size that begins that opens of jump algorithm, and, be not based on the cycle that interim dedicated channel (Temp-DCH) is provided with.Algorithm level 501 provides preferable program, uses the adjustment that produces each interim dedicated channel (Temp-DCH) setting and opens beginning target sir (SIR).
In step 502,, utilize prior art method to select one to open beginning target sir (SIR) in the beginning that a wireless transmission and receiving element (WTRU) are set up Radio Link or shifted.In step 503, this interim dedicated channel (Temp-DCH) can check whether be that (that is: whether be the beginning that a wireless transmission and receiving element (WTRU) are set up Radio Link or shifted) is set for the first time.If it is zero that step 504 can open parameter alpha the beginning.If not, this algorithm 500 can directly advance to step 505, and wherein, this interim dedicated channel (Temp-DCH) is provided with newly opens beginning target sir (SIR) and can utilize following equation to calculate, and uses the mutual time of advent of each setting of compensation.
Target_SIR (j)=α * target_SIR (j-1)+(1-α) * (initial_target_SIR) equation (12)
Wherein, j is that the present interim dedicated channel (Temp-DCH) of expression is provided with, target_SIR (j-1) is last target sir (SIR) that the previous interim dedicated channel (Temp-DCH) of expression is provided with, and, initial_target_SIR be the expression by this mapping look-up of table obtain open the beginning target sir (SIR).This parameter alpha is to forget parameter, use that the at present interim dedicated channel (Temp-DCH) of compensation is provided with and interim dedicated channel (Temp-DCH) be provided with between the beginning of ending the mutual time of advent (for instance, α=exp (T/10), wherein, T is the mutual time of advent).
In step 506, the bound test of calculating target sir (SIR) is according to maximum and minimum value MIN_DL_SIR and MAX_DL_SIR.If numerical value target_SIR is greater than predetermined greatest measure MAX_DL_SIR, then this numerical value target_SIR can be set at greatest measure (but not evaluation).On the other hand, less than predetermined minimum value MIX_DL_SIR, then this numerical value target_SIR can be set at minimum value (but not evaluation) as if numerical value target_SIR.In step 507, this target sir (SIR) can be adjusted based on data rate.
Then, in step 508, opening beginning transient state step size can be determined based on the cycle that interim dedicated channel (temp-DCH) is provided with.This radio network controller (RNC) can transmit this interim dedicated channel (temp-DCH) at the header of non real-time (NRT) data burst the cycle is set, and it preferably utilizes Transmission Time Interval (TTI) number to represent.This wireless transmission and receiving element (WTRU) are to receive and decipher this interim dedicated channel (temp-DCH) cycle is set.Step 508 is the steps 308 corresponding to Fig. 7 B, but handles correct at interim dedicated channel (temp-DCH).It is to utilize the preferred range of interim dedicated channel (temp-DCH) to be illustrated that following step size is selected.If the cycle that interim dedicated channel (temp-DCH) is provided with is less than 100TTI (cumulative density function 90～95%), then this open the step size that beginning transition step size will equal stable state (that is: SIR_step_size_TS=SIR_step_size_SS).
If cycle circle that interim dedicated channel (temp-DCH) is provided with in 100 and 200TTI between, then this open two times of step size that beginning transition step size will equal stable state (that is: SIR_step_size_TS=2SIR_step_size_SS), and, outer-loop power control also can, after a Cyclic Redundancy Check error takes place, move to stable state by transient state.
If cycle circle that interim dedicated channel (temp-DCH) is provided with in 200 and 400TTI between, then this open four times of step size that beginning transition step size will equal stable state (that is: SIR_step_size_TS=4SIR_step_size_SS), and, outer-loop power control also can, after two Cyclic Redundancy Check errors take place, move to stable state by transient state.
At last, if the cycle that interim dedicated channel (temp-DCH) is provided with is greater than 400TTI, then this open the octuple step size that beginning transition step size will equal stable state (that is: SIR_step_size_TS=4SIR_step_size_SS), and, outer-loop power control also can, after three Cyclic Redundancy Check errors take place, move to stable state by transient state.
After step 508, the outer-loop power control that at present interim dedicated channel (temp-DCH) is provided with just can begin, and in addition, step 509 is to control according to the reinforcement outer-loop power shown in Fig. 7 B to Fig. 7 C.
Be provided with at each new interim dedicated channel (temp-DCH), algorithm 500 is repetitions.
It should be noted that though the present invention's explanation is with non real-time (NRT) data instance, yet the present invention can also be applied to have short-period relatively (RT) data in real time.In addition, it should be noted, comprise interim dedicated channel (temp-DCH) cycle, target sir (SIR) border, and the parameters such as the mutual time of advent that require of interim dedicated channel (temp-DCH) can also change, use obtaining better usefulness.
The preferably, the assembly of implementing Fig. 5 to Fig. 8 algorithm can be embodied in single IC for both, such as: in the Application Specific Integrated Circuit (ASIC).Yet the part algorithm can also be implemented on independently integrated circuit of plural number.
Though the present invention's explanation is that outer-loop power control is discussed under the framework of third generation cooperative programme (3GPP),, this is not to be used for limiting scope of the present invention.The present invention can also be applicable to other wireless communication system, comprises the wireless communication system of GSM, 2G, 2.5G or any other type, and implements impartial outer-loop power control therein.In addition, have the knack of this technology,, can also carry out various adjustment and change the present invention under the prerequisite of spirit of the present invention and scope.

Claims (49)

1. transmission power control method, be applicable to a wireless transmission and receiving element (WTRU), this wireless transmission and receiving element (WTRU) are the block settings that utilizes the selectivity size, in a forward channel, carry out the transmission of data-signal, wherein, this wireless transmission and receiving element (WTRU) are to carry out framework, use a function that makes the forward channel power modulation become the target metric system, these target metric systems are based on these data-signals of receiving on this forward channel and calculate, and this transmission power control method is to comprise the following steps:
On this forward channel, in the block with a pre-sizing S is provided with, receive data-signal from this wireless transmission and receiving element (WTRU);
Based on this forward channel, the detecting of the predictive error condition of these received signals, calculate the target metric system that the forward channel power of this wireless transmission and receiving element (WTRU) is adjusted, it comprises the following steps:
Set one and open beginning target metric system numerical value; And
After this opens the time at initial stage of beginning numerical value, with this target metric system, in the time interval with a predetermined length, change one is a step number or a downward step number upwards, and by this, this target metric system is to increase this upwards step number, if connect the preceding and detected a predictive error condition in the time interval always, perhaps, this target metric system is to reduce this downward step number, if this does not directly detect this predictive error condition in the time interval the preceding; And
Based on this predetermined block big or small S is set, should downward step number be set in one and open beginning transient state position standard, by this, this opens downward step number of beginning is to be set in a standard, and, this standard is not less than a predetermined downward step number of the stable state position standard of a stable state at least, wherein, this opens downward step number of beginning is to be scheduled to downward step number greater than being somebody's turn to do of stable state position standard of this stable state, use and downward step number to reduce a selected numerical value to one than low level, if connect the preceding and detected a predictive error condition in the time interval always, being somebody's turn to do of stable state position standard that can be reduced to this stable state up to this downward step number is scheduled to downward step number.
2. transmission power control method as claimed in claim 1, wherein, the upwards step number of each standard and this downward step number are to have a predetermined corresponding relation, wherein, the calculating of these target metric systems more comprises the following steps: this make progress step number and this downward step number increase by one selected quantity, if do not detect a predictive error condition in the time interval of a predetermined number, and this downward step number is the stable state position standard that is set at this stable state.
3. transmission power control method as claimed in claim 1, wherein, the upwards step number of each standard and this downward step number are to have a predetermined corresponding relation, these target metric systems are target sir (SIR), and cyclic redundancy check (CRC) is in order to detect this predictive error condition.
4. transmission power control method as claimed in claim 3, wherein, these step number that make progress are remarkable downward step number greater than correspondence, these open the accurate step number downwards in beginning transition position is 2 nDoubly to the predetermined downward step number of the stable state position of this stable state standard, wherein, n is the natural number of nonnegative number, and wherein, this downward step number is to reduce by 1/2 times.
5. transmission power control method as claimed in claim 4, wherein, the calculating of these target metric systems comprises the following steps: that more this step number that makes progress is reached this downward step number increases by 2 times, if do not detect a predictive error condition in the time interval of a predetermined number, and this downward step number is the stable state position standard that is set at this stable state.
6. transmission power control method as claimed in claim 4, wherein, block is provided with big or small S and utilizes the increasing progressively quantity of Transmission Time Interval (TTI) and defined, and this opens downward step number of beginning and sets, by this,
n＝0?for?S＜100?TTI，
n＝1?for?100?TTI≤S＜200?TTI，
N=2 for 200 TTI≤S＜400 TTI, and
n＝3?for?S≥400?TTI
7. transmission power control method as claimed in claim 6, wherein, this method is performed on a Universal Mobile Telecommunications System (UMTS), wherein, this wireless transmission and receiving element (WTRU) are network element, it is in down link channel user data, and, the calculating of these target metric systems is to utilize a wireless transmission and receiving element (WTRU) to carry out, it is to receive this downlink channel and produce the power step command, in order to transfer to this network element on a uplink channel.
8. transmission power control method as claimed in claim 3, wherein, this wireless transmission and receiving element (WTRU) are network element, it is in down link channel user data, and, the calculating of these target metric systems is to utilize a wireless transmission and receiving element (WTRU) to carry out, and it is to receive this downlink channel.
9. transmission power control method as claimed in claim 3, wherein, this wireless transmission and receiving element (WTRU) they are transmission user data on a uplink channel, and, the calculating of these target metric systems is to utilize a network element to carry out, and it is to receive this uplink channel.
10. transmission power control method as claimed in claim 3, wherein, the control of the open-loop power of this wireless transmission and receiving element (WTRU) more comprises the following steps:
On a backward channel, utilize this wireless transmission and receiving element (WTRU) to receive these and calculate target sir (SIR), by this, this wireless transmission and receiving element (WTRU) just can calculate the power adjustment of forward channel transmission according to receiving target signal-to-jamming ratio (SIR).
11. transmission power control method as claimed in claim 3, wherein, the control of the closed loop power of this wireless transmission and receiving element (WTRU) more comprises the following steps:
Produce the power step command, it is these functions that calculate target sir (SIR), and, these power step command of transmission on a backward channel; And
On this backward channel, utilize this wireless transmission and receiving element (WTRU) to receive this constant power step command, and, calculate the power adjustment that forward channel is transmitted according to these received power step command.
12. one kind receives wireless transmission and receiving element (WTRU), in order to implement the through-put power control of a transmission wireless transmission and receiving element (WTRU), wherein, this transmission wireless transmission and receiving element (WTRU) are the block settings that utilizes the selectivity size, in a forward channel, carry out the transmission of data-signal, wherein, this transmission wireless transmission and receiving element (WTRU) are to carry out framework, use a function that makes the forward channel power modulation become the target metric system, these target metric systems are to utilize this reception wireless transmission and receiving element (WTRU) to calculate, and this reception wireless transmission and receiving element (WTRU) comprising:
One receiver in order on a forward channel, utilizes the block with a pre-sizing S that the data-signal of reception from this wireless transmission and receiving element (WTRU) is set;
One processor, it is based on this forward channel, the detecting of the predictive error condition of these reception data-signals, uses and calculates the target metric system, and then implement the forward channel through-put power adjustment of this transmission wireless transmission and receiving element (WTRU); And
This processor is to carry out framework, uses and calculates the target metric system, so,
One open the beginning numerical value a time at initial stage after, this target metric system, in the time interval with a predetermined length, be upwards a step number or a downward step number of change one, by this, this target metric system is to increase this upwards step number, if connect the preceding and detected a predictive error condition in the time interval always, perhaps, this target metric system is to reduce this downward step number, if this does not directly detect this predictive error condition in the time interval the preceding;
Based on this predetermined block big or small S is set, this downward step number is to be set in one to open beginning transient state position standard, so, this opens downward step number of beginning just can be set in a standard, and this standard is not less than a predetermined downward step number of the stable state position standard of a stable state at least; And
When this open downward step number of beginning greater than the stable state position standard of this stable state should be predetermined during downward step number, this downward step number is to reduce a selected numerical value to one than low level, if connect the preceding and detected a predictive error condition in the time interval always, being somebody's turn to do of stable state position standard that can be reduced to this stable state up to this downward step number is scheduled to downward step number.
13. reception wireless transmission as claimed in claim 12 and receiving element (WTRU), wherein, this processor be further in addition framework to calculate the target metric system, by this, the upwards step number of each standard and this downward step number are to have a predetermined corresponding relation, and, these make progress step number and downward step number are to increase by a selected quantity, if do not detect a predictive error condition in the time interval of a predetermined number, and this downward step number is the stable state position standard that is set at this stable state.
14. reception wireless transmission as claimed in claim 12 and receiving element (WTRU), wherein, these target metric systems are to be target sir (SIR), wherein, this processor is that further framework is to calculate the target metric system, and by this, the upwards step number of each standard and this downward step number are to have a predetermined corresponding relation in addition, and this reception wireless transmission and receiving element (WTRU) are to utilize cyclic redundancy check (CRC) to detect this predictive error condition.
15. reception wireless transmission as claimed in claim 14 and receiving element (WTRU), wherein, this processor be further in addition framework to calculate the target metric system, by this, these step number that make progress are remarkable downward step number greater than correspondence, and these open the accurate step number downwards in beginning transition position is 2 nDoubly to the predetermined downward step number of the stable state position of this stable state standard, wherein, n is the natural number of nonnegative number, and wherein, this downward step number is to reduce by 1/2 times.
16. reception wireless transmission as claimed in claim 15 and receiving element (WTRU), wherein, this processor be further in addition framework to calculate the target metric system, by this, these make progress step number and downward step number are to increase by 2 times, if do not detect a predictive error condition in the time interval of a predetermined number, and this downward step number is the stable state position standard that is set at this stable state.
17. reception wireless transmission as claimed in claim 15 and receiving element (WTRU), wherein, block is provided with big or small S and utilizes the increasing progressively quantity of Transmission Time Interval (TTI) and defined, and, this processor is that further framework is to calculate the target metric system, and by this, this opens downward step number of beginning and sets in addition, by this
n＝0?for?S＜100?TTI，
n＝1?for?100?TTI≤S＜200?TTI，
N=2 for 200 TTI≤S＜400 TTI, and
n＝3?for?S≥400?TTI
18. reception wireless transmission as claimed in claim 17 and receiving element (WTRU), wherein, this reception wireless transmission and receiving element (WTRU) are performed on a Universal Mobile Telecommunications System (UMTS), wherein, this wireless transmission and receiving element (WTRU) are network element, it is in down link channel user data, wherein, this reception wireless transmission and receiving element (WTRU) be according on this downlink channel, these receive the detecting of the predictive error condition of data-signals, use and calculate the target metric system.
19. reception wireless transmission as claimed in claim 14 and receiving element (WTRU), wherein, this transmission wireless transmission and receiving element (WTRU) are network element, it is in down link channel user data, wherein, this reception wireless transmission and receiving element (WTRU) be according on this downlink channel, these receive the detecting of the predictive error condition of data-signals, use and calculate the target metric system.
20. reception wireless transmission as claimed in claim 14 and receiving element (WTRU), wherein, this transmission wireless transmission and receiving element (WTRU) are transmission user data on a uplink channel, wherein, this reception wireless transmission and receiving element (WTRU) be according on this uplink channel, these receive the detecting of the predictive error condition of data-signals, use and calculate the target metric system.
21. reception wireless transmission as claimed in claim 14 and receiving element (WTRU), wherein, the open-loop power control of this transmission wireless transmission and receiving element (WTRU) more comprises following assembly: a transmitter, in order on a backward channel, these are calculated target sir (SIR) transfer to this transmission wireless transmission and receiving element (WTRU).
22. reception wireless transmission as claimed in claim 14 and receiving element (WTRU), wherein, the closed loop power control of this transmission wireless transmission and receiving element (WTRU) is carried out, wherein, this reception wireless transmission and receiving element (WTRU) are further to produce the power step command, it is these functions that calculate target sir (SIR), and, this reception wireless transmission and receiving element (WTRU) more comprise a transmitter, it is on a backward channel, and this constant power step command is transferred to this transmission wireless transmission and receiving element (WTRU).
23. transmission power control method, be applicable to a wireless transmission and receiving element (WTRU), this wireless transmission and receiving element (WTRU) are the block settings that utilizes the selectivity size, in a forward channel, carry out the transmission of data-signal, wherein, this wireless transmission and receiving element (WTRU) are to carry out framework, use a function that makes the forward channel power modulation become the target metric system, these target metric systems are based on these data-signals of receiving on this forward channel and calculate, and this transmission power control method is to comprise the following steps:
On this moves ahead channel, receive a series of block setting on time interval ground each other by this wireless transmission and receiving element (WTRU);
For the data-signal of each block setting, based on this forward channel, these receive the detecting of the predictive error condition of data-signals, use the target metric system of the forward channel power adjustment of calculating this wireless transmission and receiving element (WTRU), it comprises: set one and open beginning target metric system number, and, store the ideal metric system that each block is provided with calculating; And
After one first block is provided with, for the data-signal of each block setting, set this and open beginning target metric system numerical value for connect the function that block the preceding is provided with the ideal metric system of calculating always, and, according to setting one adjustment is set mutually with the time interval of this direct block setting the preceding.
24. transmission power control method as claimed in claim 23, wherein, each block setting is to have a pre-sizing S, wherein, based on this forward channel, these receive the detecting of the predictive error condition of data-signals, the target metric system of the forward channel power adjustment of this wireless transmission and receiving element (WTRU) calculates and more comprises the following steps:
After this opens the time at initial stage of beginning numerical value, with this target metric system, in the time interval with a predetermined length, change one is a step number or a downward step number upwards, and by this, this target metric system is to increase this upwards step number, if connect the preceding and detected a predictive error condition in the time interval always, perhaps, this target metric system is to reduce this downward step number, if this does not directly detect this predictive error condition in the time interval the preceding; And
Based on this predetermined block big or small S is set, should downward step number be set in one and open beginning transient state position standard, by this, this opens downward step number of beginning is to be set in a standard, and, this standard is not less than a predetermined downward step number of the stable state position standard of a stable state at least, and wherein, this opens downward step number of beginning is to be scheduled to downward step number greater than being somebody's turn to do of stable state position standard of this stable state, use and downward step number to reduce a selected numerical value to one than low level, if connect the preceding and detected a predictive error condition in the time interval always, being somebody's turn to do of stable state position standard that can be reduced to this stable state up to this downward step number is scheduled to downward step number.
25. transmission power control method as claimed in claim 23, wherein, this is provided with mutually and adjusts is to utilize α * previous_target_SIR+ (1-α) * initial_target_SIR decision, wherein, α is a forgetting factor, uses mutually the be provided with time of compensation greater than expection, and previous_target_SIR is the target metric system that this previous block is provided with, and initial_target_SIR is this first target metric system.
26. transmission power control method as claimed in claim 23, wherein, this transmission power control method more comprises sets the bound test that this opens beginning target metric system, wherein, this upper limit is to be additional to one first predetermined value that this opens beginning numerical value, and this lower limit is to open one second predetermined value that beginning numerical value deducts by this.
27. transmission power control method as claimed in claim 23, wherein, this transmission power control method more comprises the adjustment of this target metric system based on data rate.
28. transmission power control method as claimed in claim 23, wherein, the upwards step number of each standard and this downward step number are to have a predetermined corresponding relation, these target metric systems are target sir (SIR), and cyclic redundancy check (CRC) is in order to detect this predictive error condition.
29. transmission power control method as claimed in claim 23, wherein, these step number that make progress are remarkable downward step number greater than correspondence, and these open the accurate step number downwards in beginning transition position is 2 nDoubly to the predetermined downward step number of the stable state position of this stable state standard, wherein, n is the natural number of nonnegative number, and wherein, this downward step number is to reduce by 1/2 times.
30. transmission power control method as claimed in claim 29, wherein, the calculating of these target metric systems comprises the following steps: that more this step number that makes progress is reached this downward step number increases by 2 times, if do not detect a predictive error condition in the time interval of a predetermined number, and this downward step number is the stable state position standard that is set at this stable state.
31. transmission power control method as claimed in claim 29, wherein, block is provided with big or small S and utilizes the quantity that increases progressively of Transmission Time Interval (TTI) to define, and this opens downward step number of beginning and sets, by this,
n＝0?for?S＜100?TTI，
n＝1?for?100?TTI≤S＜200?TTI，
N=2 for 200 TTI≤S＜400 TTI, and
n＝3?for?S≥400?TTI
32. transmission power control method as claimed in claim 31, wherein, this method is performed on a Universal Mobile Telecommunications System (UMTS), wherein, this wireless transmission and receiving element (WTRU) are network element, it is in down link channel user data, and, the calculating of these target metric systems is to utilize a wireless transmission and receiving element (WTRU) to carry out, it is to receive this downlink channel and produce the power step command, in order to transfer to this network element on a uplink channel.
33. transmission power control method as claimed in claim 28, wherein, this wireless transmission and receiving element (WTRU) are network element, it is in down link channel user data, and, the calculating of these target metric systems is to utilize a wireless transmission and receiving element (WTRU) to carry out, and it is to receive this downlink channel.
34. transmission power control method as claimed in claim 28, wherein, this wireless transmission and receiving element (WTRU) they are transmission user data on a uplink channel, and, the calculating of these target metric systems is to utilize a network element to carry out, and it is to receive this uplink channel.
35. transmission power control method as claimed in claim 28, wherein, the control of the open-loop power of this wireless transmission and receiving element (WTRU) more comprises the following steps:
On a backward channel, utilize this wireless transmission and receiving element (WTRU) to receive these and calculate target sir (SIR), by this, this wireless transmission and receiving element (WTRU) just can calculate the power adjustment of forward channel transmission according to receiving target signal-to-jamming ratio (SIR).
36. one kind receives wireless transmission and receiving element (WTRU), in order to implement the through-put power control of a transmission wireless transmission and receiving element (WTRU), wherein, this transmission wireless transmission and receiving element (WTRU) are the block settings that utilizes the selectivity size, in a forward channel, carry out the transmission of data-signal, wherein, this transmission wireless transmission and receiving element (WTRU) are to carry out framework, use a function that makes the forward channel power modulation become the target metric system, these target metric systems are to utilize this reception wireless transmission and receiving element (WTRU) to calculate, and this reception wireless transmission and receiving element (WTRU) comprising:
One receiver on moving ahead channel at this, receives a series of block setting on time interval ground each other by this wireless transmission and receiving element (WTRU);
One processor, this processor are to calculate the target metric system, use based on this forward channel, these receive the detecting of the predictive error condition of data-signals, implement the forward channel through-put power adjustment of this transmission wireless transmission and receiving element (WTRU); And
This processor is to carry out framework, uses and calculates the target metric system, so,
For the data-signal of each block setting, one to open beginning target metric system number be to set, and the ideal metric system that each block is provided with calculating is to store; And
After one first block is provided with, for the data-signal of each block setting, this open beginning target metric system numerical value be set at stored connect always block the preceding be provided with calculating the ideal metric system and with should be directly the function in time interval of being provided with of block the preceding.
37. reception wireless transmission as claimed in claim 36 and receiving element (WTRU), wherein, each block setting is to have a pre-sizing S, and wherein, this processor further calculates the target metric system, by this,
After this opens the time at initial stage of beginning numerical value, with this target metric system, in the time interval with a predetermined length, change one is a step number or a downward step number upwards, and by this, this target metric system is to increase this upwards step number, if connect the preceding and detected a predictive error condition in the time interval always, perhaps, this target metric system is to reduce this downward step number, if this does not directly detect this predictive error condition in the time interval the preceding;
Based on this predetermined block big or small S is set, should downward step number be set in one and open beginning transient state position standard, by this, this opens downward step number of beginning is to be set in a standard, and this standard is not less than a predetermined downward step number of the stable state position standard of a stable state at least; And wherein
This opens downward step number of beginning is to be scheduled to downward step number greater than being somebody's turn to do of stable state position standard of this stable state, use and downward step number to reduce a selected numerical value to one than low level, if connect the preceding and detected a predictive error condition in the time interval always, being somebody's turn to do of stable state position standard that can be reduced to this stable state up to this downward step number is scheduled to downward step number.
38. reception wireless transmission as claimed in claim 36 and receiving element (WTRU), wherein, this is provided with mutually and adjusts is to utilize α * previous_target_SIR+ (1-α) * initial_target_SIR decision, wherein, α is a forgetting factor, uses mutually the be provided with time of compensation greater than expection, and previous_target_SIR is the target metric system that this previous block is provided with, and initial_target_SIR is this first target metric system.
39. reception wireless transmission as claimed in claim 36 and receiving element (WTRU), wherein, this processor is further carried out bound test and is opened beginning target metric system to set this, wherein, this upper limit is to be additional to one first predetermined value that this opens beginning numerical value, and this lower limit is to open one second predetermined value that beginning numerical value deducts by this.
40. reception wireless transmission as claimed in claim 36 and receiving element (WTRU), wherein, this processor further based on data rate to adjust this target metric system.
41. reception wireless transmission as claimed in claim 36 and receiving element (WTRU), wherein, these target metric systems are target sir (SIR), wherein, further framework is to calculate the target metric system for this processor, and by this, the upwards step number of each standard and this downward step number are to have a predetermined corresponding relation in addition, and this reception wireless transmission and receiving element (WTRU) are to utilize cyclic redundancy check (CRC) to detect this predictive error condition.
42. as claim 41 a described reception wireless transmission and receiving element (WTRU), wherein, this processor further in addition framework to calculate the target metric system, by this, these step number that make progress are remarkable downward step number greater than correspondence, and these open the accurate step number downwards in beginning transition position is 2 nDoubly to the predetermined downward step number of the stable state position of this stable state standard, wherein, n is the natural number of nonnegative number, and wherein, this downward step number is to reduce by 1/2 times.
43. reception wireless transmission as claimed in claim 42 and receiving element (WTRU), wherein, this processor further in addition framework to calculate the target metric system, by this, upwards step number and this downward step number are to increase by 2 times, if do not detect a predictive error condition in the time interval of a predetermined number, and this downward step number is the stable state position standard that is set at this stable state.
44. reception wireless transmission as claimed in claim 42 and receiving element (WTRU), wherein, block is provided with big or small S and utilizes the quantity that increases progressively of Transmission Time Interval (TTI) to define, and, further framework is to calculate the target metric system for this processor, and by this, this opens downward step number of beginning and sets in addition, by this
n＝0?for?S＜100?TTI，
n＝1?for?100?TTI≤S＜200?TTI，
N=2 for 200 TTI≤S＜400 TTI, and
n＝3?for?S≥400?TTI
45. reception wireless transmission as claimed in claim 44 and receiving element (WTRU), wherein, this reception wireless transmission and receiving element (WTRU) are performed on a Universal Mobile Telecommunications System (UMTS), wherein, this wireless transmission and receiving element (WTRU) are network element, it is in down link channel user data, wherein, this reception wireless transmission and receiving element (WTRU) be according on this downlink channel, these receive the detecting of the predictive error condition of data-signals, use further calculating target metric system.
46. reception wireless transmission as claimed in claim 41 and receiving element (WTRU), wherein, this transmission wireless transmission and receiving element (WTRU) are network element, it is in down link channel user data, wherein, this reception wireless transmission and receiving element (WTRU) be according on this downlink channel, these receive the detecting of the predictive error condition of data-signals, use further calculating target metric system.
47. reception wireless transmission as claimed in claim 41 and receiving element (WTRU), wherein, this transmission wireless transmission and receiving element (WTRU) are transmission user data on a uplink channel, wherein, this reception wireless transmission and receiving element (WTRU) be according on this uplink channel, these receive the detecting of the predictive error condition of data-signals, use further calculating target metric system.
48. reception wireless transmission as claimed in claim 44 and receiving element (WTRU), wherein, the open-loop power of this transmission wireless transmission and receiving element (WTRU) is controlled further framework, wherein, this reception wireless transmission and receiving element (WTRU) more comprise a transmitter, in order on a backward channel, these are calculated target sir (SIR) transfer to this transmission wireless transmission and receiving element (WTRU).
49. reception wireless transmission as claimed in claim 41 and receiving element (WTRU), wherein, the closed loop power of this transmission wireless transmission and receiving element (WTRU) is controlled further framework, wherein, this reception wireless transmission and receiving element (WTRU) more produce the power step command, it is these functions that calculate target sir (SIR), and, this reception wireless transmission and receiving element (WTRU) more comprise a transmitter, in order on a backward channel, this constant power step command is transferred to this transmission wireless transmission and receiving element (WTRU).
CN200380104046.8A 2002-11-26 2003-11-25 Wireless transmission and reception unit, and its transmission power control method Expired - Fee Related CN1714518B (en)

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US42988802P 2002-11-26 2002-11-26
US60/429,888 2002-11-26
US44485003P 2003-02-04 2003-02-04
US60/444,850 2003-02-04
PCT/US2003/038185 WO2004049589A1 (en) 2002-11-26 2003-11-25 Outer loop power control for wireless communication systems

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CN104956741A (en) * 2012-10-10 2015-09-30 高通股份有限公司 Uplink timing control to reduce call drop

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MY138839A (en) * 2002-11-26 2009-07-31 Interdigital Tech Corp Outer loop power control for wireless communication systems

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MY138839A (en) * 2002-11-26 2009-07-31 Interdigital Tech Corp Outer loop power control for wireless communication systems

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104956741A (en) * 2012-10-10 2015-09-30 高通股份有限公司 Uplink timing control to reduce call drop

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