CN101385246B - Reduced terminal power consumption via use of active hold state - Google Patents

Reduced terminal power consumption via use of active hold state Download PDF

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Publication number
CN101385246B
CN101385246B CN200780005760XA CN200780005760A CN101385246B CN 101385246 B CN101385246 B CN 101385246B CN 200780005760X A CN200780005760X A CN 200780005760XA CN 200780005760 A CN200780005760 A CN 200780005760A CN 101385246 B CN101385246 B CN 101385246B
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access terminal
wireless access
base transceiver
hold state
active hold
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CN101385246A (en
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拉希德·艾哈迈德·阿克巴尔·阿塔尔
纳加·布尚
琼·普特·凌·欧
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Qualcomm Inc
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Qualcomm Inc
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/70Reducing energy consumption in communication networks in wireless communication networks

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Abstract

An access terminal (AT) in a cellular communication system is configured to operate in an active hold (AH) state, a transitional state between traffic and dormant states. The AT applies power to its transmit chain with a low duty cycle while in the AH state, conserving battery power. To improve robustness of the communications, the radio network may power control the AT to a higher level relative to the power control level of the AT in the traffic state. Transition from the traffic state to the AH state may be initiated after a brief period of inactivity on the reverse link. The AT may remain in the AH state while receiving forward link payload data. Transmission of a reverse link payload packet in the AH state may initiate transition to the traffic state. A prolonged period of inactivity may initiate a transition from the AH state to the dormant state.

Description

Via using active hold state to reduce terminal power consumption
Advocate priority according to 35U.S.C. § 119
Present application for patent advocates that on February 21st, 2006, the title of application was the priority of the 60/775th, No. 443 U.S. Provisional Patent Application case of " wireless communication system and method " (" WirelessCommunication System and Method, "); Present application for patent is also advocated the priority of the title of application on February 21st, 2006 for the 60/775th, No. 693 U.S. Provisional Patent Application case of " DO communication system and method " (" DOCommunication System and Method, ").Each in these temporary patent application cases all transfers the assignee of the application's case, and is incorporated herein clearly with the form of quoting as complete elaboration ground, comprises all figure, table and claim.
Technical field
The present invention relates to telecommunications by and large, and more particularly, the present invention relates to wireless communication system and cellular communications system.
Background technology
The expectation Modern Communication System is that multiple application (for example voice and market demand) provides reliable transfer of data.In the point-to-multipoint delivery environment, known communication system is based on frequency division multiple access (FDMA), time division multiple access (TDMA), code division multiple access (CDMA) and other multiple access communication scheme perhaps.
cdma system can be designed to support one or more CDMA standards, for example (1) " the TIA/EIA-95 travelling carriage base station compatibility standard that is used for double mode wideband spread spectrum cellular formula system " (this standard can be called " IS-95 standard " with its enhancing revised edition A and B), (2) " TIA/EIA-98-C that is used for double mode wideband spread spectrum cellular formula travelling carriage recommends minimum standard " (" IS-98 standard "), (3) initiated and be embodied in one group and be called standard in the document of " W-CDMA standard " by by name " third generation partner program " association (3GPP), (4) initiate and be embodied in one group of standard in file by " third generation partner program 2 " association (3GPP2) by name, described document comprises " the TR-45.5 physical layer standard that is used for the cdma2000 spread spectrum system ", " C.S0005-A upper strata (the 3rd layer) the signal transmission standard that is used for the cdma2000 spread spectrum system " reaches " TIA/EIA/IS-856cdma2000 high speed packet data air interface specification " (being referred to as " cdma2000 standard "), (5) 1xEV-DO standard and (6) some other standard.The standard of below clearly listing is incorporated herein as complete elaboration ground, comprise annex, appendix and other additives.
Data and data-optimized or " DO " cellular communications system have only been developed to meet for the ever-increasing demand of wireless data service.Contain as title, the DO system is to optimize for transfer of data (with respect to voice transfer), and exactly described system is to optimize for downlink transmission.Data-optimized systems needn't be got rid of the voice transfer on uplink data transmission or either direction.It should be noted that voice can be used as transfer of data, for example, in the situation of internet voice protocol (VoIP) transmission.
In wireless network, be configured for accessing terminal of communication and can be in service condition/pattern or be in resting state/pattern.In service condition, be used for access terminal with radio net between the air link resources of communicating by letter be to distribute at the radio net place, and at the place of accessing terminal, open.The air link resources at the place of accessing terminal can comprise (for example) indication Service Source (finger resource) and element in channel.In resting state, Traffic Channel is cut off, and air link resources is closed at the place of accessing terminal.Therefore do not consume the required power of these resources of operation during resting state, and the battery life at the place that accesses terminal extends., for the most of time during resting state, also can close other subsystem that accesses terminal or be switched to power saving mode; Then the described paging channel with the monitoring wireless system of often waking up that accesses terminal, paging or the communication request imported into response.The work period that this periodicity interrogation link checks is lower, to reduce stand-by power consumption.
For given battery capacity, power consumption determines to access terminal to need not to recharge and exercisable time quantum.On the contrary, for the specific operation time between battery recharge, average power consumption determines required battery capacity and therefore determines battery size, weight and cost.Thereby it is quite important to reduce the power consumption that accesses terminal.
Owing to being interference for the transmission that accesses terminal from other from the given transmission that accesses terminal, so also need to reduce duration and/or the power levels of this a little transmission.
Therefore, need the power consumption that reduction is accessed terminal and the method and apparatus of interference in technique.Also need to exceed for reducing the power consumption that accesses terminal and interference in technique sacrifice access terminal and with the method and apparatus of the performance characteristics of the radio net of described terminal communication.The network that further needs to be used for institute's arrangement before upgrading is kept simultaneously so that the accessing terminal power consumption and interference of reduction to be provided the backward compatibility that accesses terminal with old edition and is minimized or eliminate the method for the hardware change of radio net.
Summary of the invention
Embodiments disclosed herein are made article and are solved the demand by being provided in wireless access terminal operative activities hold mode and being used for method, equipment and the machine readable of with described wireless access terminal, communicating by letter.
In one embodiment, a kind of wireless access terminal for the base transceiver station of radio net, communicating by letter comprises: receiver, and it is configured to receive forward link transmissions from described base transceiver station; Transmitter, it is configured to send rl transmission to described base transceiver station; Memory, it is program code stored; And controller, it is couple to described receiver, described transmitter and described memory.described controller is configured to carry out described program code, thereby cause described wireless access terminal: (1) in response to during the first predetermined period of time without reverse link traffic, initial transition from the service condition to the active hold state, (2) in response to there being reverse link traffic, initial transition from described active hold state to described service condition, (3) in response to unmatched to link traffic and reverse link traffic during at least the second predetermined period, initial transition from described active hold state to resting state, (4) in response to there being reverse link traffic, initial transition from described resting state to described service condition, (5) after being transitioned into described active hold state, there is at the same time forward link traffic and without during reverse link traffic (that is having forward link traffic in without reverse link traffic), remain in described active hold state, and (6) close at least one assembly of described transmitter in described active hold state, make in described active hold state, the work period of described at least one assembly is less than predetermined threshold.In all fields, described threshold value can be 25% of the described work period.
In one embodiment, a kind of machine-readable medium comprises the instruction that is embedded in wherein.when described instruction is carried out by at least one processor that is used for the wireless access terminal of with the base transceiver station of radio net, communicating by letter, described instruction causes described wireless access terminal: (1) in response to during the first predetermined period of time without reverse link traffic, initial transition from the service condition to the active hold state, (2) in response to there being reverse link traffic, initial transition from described active hold state to described service condition, (3) in response to unmatched to link traffic and reverse link traffic during at least the second predetermined period, initial transition from described active hold state to resting state, (4) in response to there being reverse link traffic, initial transition from described resting state to described service condition, (5) after being transitioned into described active hold state, there is at the same time forward link traffic and without during reverse link traffic, remain in described active hold state, and (6) close at least one assembly of described transmitter in described active hold state, make in described active hold state, the work period of described at least one assembly is less than 25%.
In one embodiment, a kind of wireless access terminal for the base transceiver station of radio net, communicating by letter comprises: for the device that receives forward link transmissions from described base transceiver station (for example, receiver/receiver link), to the device of described base transceiver station (for example be used for to send rl transmission, the transmitter/transmitter link), (for example be used for program code stored device, storage arrangement) reach and be used for carrying out described program code to cause described wireless access terminal to carry out the control device (for example, processor) of a plurality of steps.described step comprises: (1) in response to during the first predetermined period of time without reverse link traffic, initial transition from the service condition to the active hold state, (2) in response to there being reverse link traffic, initial transition from described active hold state to described service condition, (3) in response to unmatched to link traffic and reverse link traffic during at least the second predetermined period, initial transition from described active hold state to resting state, (4) in response to there being reverse link traffic, initial transition from described resting state to described service condition, (5) after being transitioned into described active hold state, there is at the same time forward link traffic and without during reverse link traffic, remain in described active hold state, and (6) close at least one assembly of described transmitter, make in described active hold state, the work period of described at least one assembly is less than 25%.
In one embodiment, provide a kind of method for operating the wireless access terminal of with the base transceiver station of radio net, communicating by letter.described method comprises these steps: (1) in response between described wireless access terminal during the first predetermined period of time and described base transceiver station without reverse link traffic, initial transition from the service condition to the active hold state, (2) in response to having reverse link traffic between described wireless access terminal and described base transceiver station, initial transition from described active hold state to described service condition, (3) in response to unmatched to link traffic and reverse link traffic between described wireless access terminal during at least the second predetermined period and described base transceiver station, initial transition from described active hold state to resting state, (4) in response to having reverse link traffic between described wireless access terminal and described base transceiver station, initial transition from described resting state to described service condition, (5) after being transitioned into described active hold state, there is simultaneously forward link traffic and during without reverse link traffic between described wireless access terminal and described base transceiver station, cause described wireless access terminal to remain in described active hold state, and (6) close at least one assembly of the transmission link of described wireless access terminal in described active hold state, make in described active hold state, the work period of described at least one assembly is less than 25%.
In one embodiment, provide a kind of operation to be used for the method for the wireless access terminal of via forward link and reverse link, with the base transceiver station of radio net, communicating by letter.Said method comprising the steps of: (1) causes described wireless access terminal to enter the step of resting state in response to the forward link between described wireless access terminal and described base transceiver station and the business inertia cycle on reverse link, (2) step that causes described wireless access device to enter service condition in response to the business activity on reverse link, and (3) cause described wireless access terminal to enter the step of active hold state in response to the business inertia cycle on described reverse link.In described method, no matter the business activity on forward link and carry out the step that causes described wireless access terminal to enter active hold state, and at least a portion of the transmission link of wireless access terminal is opened and closes in the wireless access terminal that is in active hold state with the work period less than 25%.
In one embodiment, provide a kind of base transceiver station in radio net.Described base transceiver station comprises: receiver, and it is configured to receive from wireless access terminal data on reverse link; Transmitter, it is configured to transmit data on the forward link described wireless access terminal; And processor, it is couple to described receiver and described transmitter.described processor is configured to cause described base transceiver station execution step, described step comprises: (1) permits the request that enters active hold state from described wireless access terminal, wherein said wireless access terminal produces described request in response to the business inertia cycle on reverse link, and wherein with respect to service condition, described wireless access terminal is reduced in active hold state the feedback renewal frequency to described forward link, (2) when described wireless access terminal is in active hold state, the transmission forward link traffic, and (3) receive reverse link traffic in service condition.
In one embodiment, a kind of base transceiver station in radio net comprises following assembly: the device that is used for receiving from wireless access terminal data on reverse link; Be used for transmitting data on the forward link the device of described wireless access terminal; And for the treatment of control device.described control device is couple to described receiver and described transmitter, and be configured to cause described base transceiver station to carry out these steps: (1) permits the request that enters active hold state from described wireless access terminal, wherein said wireless access terminal produces described request in response to the business inertia cycle on reverse link, and wherein with respect to service condition, described wireless access terminal is reduced in while being in active hold state the feedback renewal frequency to forward link, and (2) are when described wireless access terminal is in active hold state, the transmission forward link traffic.
In one embodiment, provide a kind of base transceiver station for the operate wireless electric network to control the method for wireless access terminal.described method comprises: (1) permits the request that enters active hold state from described wireless access terminal, wherein said wireless access terminal produces described request in response to the business inertia cycle on the reverse link between described wireless access terminal and described base transceiver station, the described wireless access terminal that wherein is in described active hold state provides feedback to the forward link between described wireless access terminal and described base transceiver station with first frequency, and wherein said wireless access terminal provides feedback to forward link with second frequency in service condition, described second frequency is greater than described first frequency, and (2) are when described wireless access terminal is in active hold state, transport service on the forward link.
In one embodiment, a kind of machine-readable medium comprises the instruction that is embedded in wherein.when described instruction is carried out by at least one processor of the base transceiver station of radio net, described instruction causes described base transceiver station to carry out following operation: (1) permits the request that enters active hold state from wireless access terminal, wherein said wireless access terminal produces described request in response to the business inertia cycle on the reverse link between described wireless access terminal and described base transceiver station, the described wireless access terminal that wherein is in described active hold state provides feedback to the forward link between described wireless access terminal and described base transceiver station with first frequency, and wherein said wireless access terminal provides feedback to described forward link with second frequency in service condition, described second frequency is greater than described first frequency, and (2) are when described wireless access terminal is in active hold state, transport service on the forward link.
Illustrate by reference to the following description, and the claims of enclosing will be understood these and other embodiment of the present invention and aspect better.
Description of drawings
Fig. 1 explanation is according to the selected assembly of the cellular communications system of one embodiment of the invention configuration;
Fig. 2 is illustrated in Fig. 1 network operation and according to the selected state that accesses terminal of one embodiment of the invention configuration and the state diagram of transition;
Fig. 3 is the simplification general view of the operation that accesses terminal that is in active hold state according to one embodiment of the invention; And
Fig. 4 explanation is according to the selected step and the decision block that are in the performed process of accessing terminal of active hold state of one embodiment of the invention.
Embodiment
In this document, word " embodiment ", " version " and similar wording are used in reference to for particular device, process or make article, and may not mean same equipment, process or make article.Therefore, " embodiment " (or the similar wording) for a position or environment can refer to particular device, process or make article; The same or similar wording of diverse location can refer to distinct device, process or make article.Wording " alternate embodiment " and similar phrase are used for representing the one of a plurality of different possible embodiment.The number of possible embodiment may not be limited to two or any other quantity.
Word " exemplary " is used for meaning " as example, example or explanation " in this article.Any embodiment or the version that are described as in this article " exemplary " may not be interpreted as preferred or be better than other embodiment or version.This all embodiment and version of describing described in content is one exemplary embodiment and version; the those skilled in the art provides described embodiment and version so that can make or use the present invention; and it does not limit the scope of legal protection provided by the invention, and described scope is defined by claims and equivalent thereof.
Word " business " generally speaking refers to pay(useful) load or customer service, for example the data except air interface control and pilot tone.
Access terminal (also referred to as AT), subscriber stations, subscriber's installation, UE, mobile terminal or MT can be mobile or static, and can communicate by letter with one or more base transceiver stations.Accessing terminal can be any one in the polytype device, includes but not limited to PC card, external or internal modem, radio telephone and has the personal digital assistant (PDA) of wireless communication ability.Access terminal and receive packet via one or more base transceiver station the transmission of data bags to radio network controller or from radio network controller.
Base transceiver station and base station controller are the part that is called the network of radio net, RN, access network and AN.Radio net can be UTRAN or UMTS terrestrial radio access network.Radio net can transmit packet between a plurality of accessing terminal.Radio net can further be connected to the additional networks of described radio net outside, for example Intranet, internet, conventional PSTN (PSTN) or another radio net, and can access terminal and transmit data and voice packet between a little external networks therewith at each.Depending on agreement and particular implementation version, base transceiver station can be known as other title, for example Node B, base station system (BSS) or abbreviation base station.Similarly, base station controller can be known as other title, for example radio network controller, RNC, controller, mobile switching centre or Serving GPRS Support Node.
Scope of the present invention extends to these and similar wireless communication system components.
Fig. 1 illustrates the selected assembly of communication network 100, and communication network 100 comprises the radio network controller 110 that is couple to wireless base transceiver station 120A, 120B and 120C.Base transceiver station 120 is connected 140A with the 130A that accesses terminal, 130B, 130C and 130D via respective wireless and communicates by letter to 140E.Each expression forward link (from BTS to AT, also referred to as down link) and reverse link (from AT to BTS, also referred to as up link) in wireless connections 140 both.Radio network controller 110 is couple to PSTN 150 via telephone exchange 160, and via bag data server node (PDSN) 180, is couple to packet network 170.Can use the agreement (for example, Internet Protocol (IP), asynchronous transfer mode (ATM) agreement, T1, E1, frame relay and other agreement) of any number to implement exchanges data between variety of network components (for example radio network controller 110 with wrap data server node 180).
Radio network controller 110 and base transceiver station 120 can be the parts of data-optimized radio network (for example 1xEV-DO network).In the illustrated embodiment, described radio net to access terminal 130 provide data communication services and cellular telephone services both.In alternate embodiment, described radio net can only provide data, services (comprising VoIP and similar voice communication based on packetized data), or voice service only is provided.
A plurality of and even all described accessing terminal 130 can be arranged in same residential quarter or position, or each accesses terminal and 130 can be arranged in independent residential quarter or position.
The typical case access terminal (130A for example, accesses terminal) comprise acceptor circuit 131, transmitter circuit 132, encoder 133, decoder 134, equalizer 135, processor 136 and storage arrangement 137.Receiver, transmitter, encoder, decoder and equalizer are stored in the processor configuration of the program code in storage arrangement by execution.Each accesses terminal and 130 is configured to use at least one host-host protocol (the packet radio host-host protocol of for example describing in above-mentioned standard) to transmit data.As shown in fig. 1, access terminal 130 via communication channel 140A, to 140E, to come to communicate by letter with base transceiver station 120.
Each in base transceiver station 120 comprises one or more wireless receivers (for example receiver 121 of BTS 120A), one or more Wireless Transmitters (for example transmitter 122 of BTS 120A), radio network controller interface (for example interface 123), memory (for example memory 124), processor (for example processor 125) and encoder/decoder circuitry (for example encoder/decoder circuitry 126).Receiver/the transmitter of each base transceiver station to and other assembly be configured to set up by the processor (operating under the control of its program code in being stored in the memory of described BTS) at described station and access terminal 130 forward link and reverse link, thereby 130 send bag and from accessing terminal, 130 receive bag to accessing terminal.For example, in the situation that data, services, base transceiver station 120 can receive forward chain data pack from packet network 170 via bag data server node 180 and via radio network controller 110, and these bags are transferred to and access terminal 130.Base transceiver station 120 can receive the reverse link data packets that comes from 130 places that access terminal, and via radio network controller 110 and bag data server node 180, these bags is forwarded to packet network 170.In the situation that phone (voice) service, base transceiver station 120 can receive forward chain data pack from telephone network 150 via telephone exchange 160 and via radio network controller 110, and these bags are transferred to and access terminal 130.Can receive and come from the voice packet at 130 places that access terminal at base transceiver station 120 places, and via radio network controller 110 and telephone exchange 160, these bags are forwarded to telephone network 150.
In some alternate embodiment, the transmitter of each BTS, receiver and other assembly can respectively have independent processor.
Radio network controller 110 comprises one or more interfaces that arrive base transceiver station 120 111, reaches the interface 113 of telephone exchange 160 to the interface 112 of bag data server node 180.Interface 111,112 and 113 operates under the control of one or more processors 114 (its execution be stored in one or more storage arrangements 115 in program code).
Network 100 illustrated in fig. 1 comprises that a PSTN, packet network, base station controller, three base transceiver stations and four access terminal.Those skilled in the art will realize that after studying this document carefully, the alternate embodiment of each side need not to be limited to these assemblies of any given number according to the present invention.For example, can comprise in some embodiments the base transceiver station of smaller or greater number and accessing terminal.In addition, communication network 100 can 130 be connected to one or more additional communication networks with accessing terminal, and for example, has the second cordless communication network of a plurality of wireless access terminals.
As already mentioned, known the accessing terminal that is configured for use in communication can be in dormancy or service condition, this depend on this known access terminal and radio net between the Network state.Service condition is corresponding to the business activity between radio net and mobile terminal.For example, access terminal and can be transitioned into service condition from resting state in response to audio call or data communication.Audio call or data communication can import (to accessing terminal) into or (from accessing terminal) spreads out of.On the contrary, when business activity stopped in certain predetermined period of time, accessing terminal can be from the business status transition to resting state.Usually, radio net is controlled the transition between two states.
Business activity may be quite asymmetric at radio net and between accessing terminal.In other words, in one direction may be than transmitting in the opposite direction significantly more business.Especially true for data communication, downlink traffic circulation this moment is everlasting and is surpassed to a great extent uplink service flows.For example, the user is accessing terminal and may relatively download mass file in long time period, and wherein control information is transmitted with the up link form mostly.Control information can be from various layers, and for example, Internet Protocol (IP) is confirmed and power is controlled, speed is controlled and the pilot tone of physical air link.Similarly, the VoIP conversation can be folk prescription, and wherein the user at the place of accessing terminal in most of the cases listens to or occupied circuit for a long time.During these a little time cycles, the uplink resource that accesses terminal continue to be opened, and therefore consumed power, although it need not user (pay(useful) load) data of carrying from the radio net that accesses terminal.
Base transceiver station (for example, the BTS 120A) communication of in one embodiment, access terminal 130 (130A for example, accesses terminal) and radio net.Described radio net can be (for example) data-optimized radio network (for example 1xEV-DO network), only data network or speech network only.When being connected to radio net, described accessing terminal is configured and is in one in following three kinds of states: (1) service condition, movable (AH) state that keeps in (2) resting state and (3).Front two states is similar or be equal to conventional service condition and the resting state that accesses terminal respectively.Active hold state is the transition intermediateness between resting state and service condition.This state allows the extra reduction of the power consumption that accesses terminal, especially during the inactive prolongation of the reverse link traffic cycle (with the forward link traffic activity that accesses terminal, overlapping).
In active hold state, access terminal and use some air link resources with low duty cycle.For example, can close element in channel, indication Service Source and other transmit chain elements at the reverse strand trackside shangguan that accesses terminal in the time of essence percentage.For example, the work period of transmission link can be less than 50%, less than 25% or less than 5%.In some version, access network (for example, BTS) can not deallocate, remove and assign or close element in channel and indication Service Source and it can't be served be in accessing terminal of active hold state.And in some version, radio net is not removed any resource of configuration from being in accessing terminal of this state.
Fig. 2 is for showing the state diagram of the transition between service condition 210, resting state 220 and active hold state 230.In service condition 210, access terminal and 130 with base transceiver station 120, communicating by letter actively.230 transition 213 is in response to the of short duration business inertia cycle and occurs from service condition 210 to active hold state.(it should be noted that for cause or initial business, dormancy and active hold state between movable and inactive the mentioning of transition be to mention respectively pay(useful) load business activity or inertia.) after transition 213 can betide the reverse link inertia cycle, and/or reverse link and after the forward link inertia cycle.In certain embodiments, transition 213 is initial after reverse link AH (the movable maintenance) inertia timer expired, or initial after reverse link AH inertia timer and forward link AH inertia timer expired.(described two timers can be set as after the identical or different time cycle overtime.)
When access terminal and radio net between business activity while restarting, 210 transition 231 is by initial from active hold state 230 to service condition.For example, reverse link traffic is with initial transition 231.During the of short duration inertia of (but not only reverse link on) entered the version of active hold state 230 on accessing terminal due to reverse link and forward link, the forward link activity that restarts also can initial transition 231.
When being in active hold state 230,220 transition 232 is initial in response to another business inertia cycle from active hold state 230 to resting state.Transition 232 can the inertia on both occur after the cycle at reverse link and forward link.In certain embodiments, transition 232 be after reverse link dormant inertia timer expired and forward link dormant inertia timer expired after initial.As the situation of transition 213, described two timers can be set as after the identical or different time cycle overtime.Therefore transition 232 is that certain inertia on both is initial after the cycle at reverse link and forward link.
210 transition 221 is in response to and has reverse link traffic and initial from resting state 220 to service condition.In certain embodiments, transition 221 can be in response to access terminal and base transceiver station between any business (pay(useful) load) and initial.Yet in certain embodiments, from resting state 220 to active hold state 230 transition 223 only initial in response to forward link traffic, and as long as reverse link traffic occur, transition 221 is namely by initial.
Transition between different conditions shown in Fig. 2 can be initial by accessing terminal, and is for example, initial by send the code word of otherwise not using (standby) on reverse rate (RRI) channel.It is favourable using standby RRI code word, because it can not be mistaken as, is any other things at radio net place.Then radio net (for example, radio network controller 110) determines whether the transition of permitting asking.Can on the one in forward link control channel, allowance be sent to and access terminal, for example, send on confirmation (ACK) channel.In fact, the ACK in response to RRI represents: radio net also makes to access terminal and is transitioned into active hold state.Perhaps or in addition, by sending suitable control message to accessing terminal, radio net can initial some transition.In the specific change form, following initial transition:
230 transition 213-uses special RRI code word initial via the RRI channel by accessing terminal from service condition 210 to active hold state, and by accessing terminal, via ack channel, permits;
From active hold state 230 to resting state 220 transition 232-in reverse link and both prolongation inertias (at least 2 seconds) of forward link traffic afterwards, by access terminal or radio net initial;
From active hold state 230 to service condition 210 transition 231-due to the reverse link bag by accessing terminal initial and by radio net, being permitted.Described special RRI code word can be used for being transitioned into active hold state (access terminal and can use this code word to represent that to radio net it is just attempting to enter active hold state), and the ack channel in response to described special RRI code word can be radio net, and it accesses terminal and be in now active hold state to the expression that accesses terminal.
It should be noted that ack channel message can keep with existing system in identical, but in the explanation to these message while being in active hold state that accesses terminal, may change.For example, when being in accessing terminal of active hold state and sending the reverse link bag, the radio net on ack channel is used for also to the confirmation of described bag that making accesses terminal enters service condition from active hold state.
Turn to now the operation in active hold state (for example state 230).As discussing, in some versions, access terminal (for example, terminal 130A) can be in this state when receiving forward link pay(useful) load business.In these versions, access terminal within the most of the time and can close described transmit chain elements, when being provided, downlink feedback information make transmission link recover to open.Owing to service condition, comparing, the work period of the transmission link of opening when active hold state is lower, so can realize significant power saving.In some specific change forms, every 8 time slots that access terminal open once its transmission link with (for example, power control, data rate control, reverse-link pilot frequency, data source are controlled) provide feedback to radio net, corresponding to the about renewal rate of 75 hertz; In other specific change form, every 16 time slots that access terminal are opened its transmission link once, corresponding to the about renewal rate of 37.5 hertz.These renewal rates are respectively than the slow twice of 150 hertz of renewal rates that use in service condition (in 1xEV-DO revised edition B, every 4 time slots once) and four times.It should be noted that the specific ratios that the invention is not restricted between described specific renewal rate or active hold state and service condition renewal rate.
With lower speed provide feedback information to make to access terminal with radio net between the steadiness of communicating by letter die down, especially in the vertiginous dynamic environment of physical propagation path.For example, with the compensation that the lamp power control set point that radio net accesses terminal by raising can be made, compare, access terminal and base transceiver station between physical propagation path may be faster feebly.In order to solve this potential problems, in some versions, with respect to the lamp power control set point of the service condition with same signal/noise and interference ratio (SINR), described radio net improves the lamp power control set point that accesses terminal that is in active hold state.In some specific change forms, lamp power control set point can be improved approximately 1dB, 2dB, 3dB or 4dB.The raising of lamp power control set point and the reduction of renewal rate are by determining each other and variable.For example, when renewal rate reduces by half (being also the respective rate with respect to service condition), lamp power control set point can be improved 2dB (the respective settings point that surpasses the service condition with identical SINR).In addition, in some version, radio net is only brought up to set point a certain Power Limitation.Described Power Limitation can be to make brings up to the Power Limitation that will start to affect the power consumption that accesses terminal over described restriction with power.In many accessing terminal, total power consumption substantially the same (for example, in 0.1mW) and irrelevant with actual transmission power, until through-put power reaches Power Limitation.Therefore from the viewpoint of power consumption, the cost that improves lamp power control set point is very little, as long as through-put power is no more than the aforementioned Power Limitation of mentioning.Described Power Limitation can be approximately 0dBm, 5dBm or 10dBm.These value yes exemplary value, and actual power limit can be different.
Fig. 3 is the simplification general view that is in the operation of the specific change form in active hold state.
Fig. 4 explanation is in the performed example procedure of accessing terminal of active hold state 400., at flow points 401 places,, due to certain inertia cycle on reverse link (during the described cycle, any effective load data not being transferred to the described base transceiver station that accesses terminal of service from accessing terminal), accessing terminal and enter active hold state., at step 405 place, access terminal the frequency that provides feedback to upgrade to base transceiver station is provided.Base transceiver station can improve the lamp power control set point that accesses terminal simultaneously.
, at decision block 410 places, access terminal and determine on reverse link, whether business (pay(useful) load) activity restarts.If there is the business activity that restarts on reverse link, the initial transition to service condition at step 415 place, and method 400 ends at flow points 499 places.
If there is not the business activity that restarts on reverse link, method flow proceeds to decision block 420, accesses terminal in described square frame and has determined that since last traffic whether elapsed time is greater than certain restriction.Described restriction can be predetermined.If elapsed time surpasses described restriction (as situation possible when base transceiver station continues to transmit forward link traffic), method flow turns back to decision block 410.
If elapsed time surpasses described restriction, the initial transition to resting state at step 425 place, and method 400 ends at flow points 499 places.
Although sequentially described step and the decision-making of the whole bag of tricks in this disclosure, some steps in these steps and decision-making and decision-making can by individual component jointly or concurrently, asynchronous or synchronously, with pipelined fashion or alternate manner, carry out.The particular requirement that does not exist described step and decision-making to carry out to describe therewith the identical order of the order in content, it listed, unless clear and definite so explanation otherwise shows from the context, or inherent requirement is arranged.Yet (it should be noted that described step and decision-making are carried out with above-mentioned order in selected version.) in addition, may not need illustrated each step and decision-making in each embodiment according to the present invention, and according to some embodiments of the present invention, some steps that do not illustrate and decision-making may be to need or necessity.
Those skilled in the art will appreciate that, can use any one expression information and signal in various different technologies and skill and technique.For example, running through data, instruction, order, information, signal, position, symbol and the chip that may quote in above description process can be represented by voltage, electric current, electromagnetic wave, magnetic field or magnetic-particle, light field or optical particulate or its any combination.
The those skilled in the art will be further understood that, various illustrative logical blocks, module, circuit and the algorithm steps of describing in conjunction with embodiments disclosed herein can be embodied as electronic hardware, computer software or both combinations., in order clearly to show this interchangeability of hardware and software, abovely functional various Illustrative components, block, module, circuit and step are described about it substantially.Application-specific and the design constraint of forcing on whole system depended in this functional combination that is embodied as hardware, software or hardware and software.The those skilled in the art can implement with variation pattern described functional for each application-specific, but these a little implementation decisions should not be construed as and cause departing from the scope of the present invention.
Various illustrative logical blocks, module and the circuit of describing in conjunction with embodiments disclosed herein can be implemented or carry out together with the general processor that is designed to carry out function described herein, digital signal processor (DSP), application-specific integrated circuit (ASIC) (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components or its arbitrary combination.General processor can be microprocessor, but in replacement scheme, described processor can be arbitrary conventional processors, controller, microcontroller or state machine.Processor also can be embodied as the combination of calculation element, for example, and combination, multi-microprocessor, one or more microprocessors of with the DSP core, being combined or any other this configuration of DSP and microprocessor.
In the software module that the method for describing in conjunction with embodiments disclosed herein or the step of algorithm can be embodied directly in hardware, carried out by processor, or in this both combination.Software module can reside in the medium of any other form known in RAM memory, flash memory, ROM memory, eprom memory, eeprom memory, register, hard disk, removable disk, CD-ROM or technique.Exemplary storage medium is couple to processor so that described processor can or write information to described medium from described read information.In replacement scheme, medium can be incorporated in processor.Processor and medium can reside in ASIC.During ASIC can reside at and access terminal.Perhaps, processor and medium can be used as during discrete component resides at and access terminal.
The those skilled in the art provide previous description to announcement embodiment so that can make or use the present invention.The those skilled in the art will easily understand the various modifications to these embodiment, and in the situation that do not break away from the spirit or scope of the present invention, the General Principle that this paper can be defined is applied to other embodiment.Therefore, the present invention not is intended to be limited to the embodiment that this paper shows, and should meet the widest range consistent with principle disclosed herein and novel feature.

Claims (34)

1. equipment that is used for the wireless access terminal that operation communicates by letter with the base transceiver station of radio net, described equipment comprises:
Be used in response between described wireless access terminal during the first predetermined period of time and described base transceiver station without reverse link traffic, the device of initial transition from the service condition to the active hold state, wherein by send the alternate code word on reverse rate RRI channel, carry out initial described transition from described service condition to described active hold state
Be used in response to having reverse link traffic between described wireless access terminal and described base transceiver station, the device of initial transition from described active hold state to described service condition,
Be used in response to unmatched to link traffic and reverse link traffic between described wireless access terminal during the second predetermined period and described base transceiver station, the device of initial transition from described active hold state to resting state,
Be used in response to having reverse link traffic between described wireless access terminal and described base transceiver station, the device of initial transition from described resting state to described service condition,
Be used for after being transitioned into described active hold state, have forward link traffic simultaneously and during without reverse link traffic, remain in the device of described active hold state between described wireless access terminal and described base transceiver station, reach
Be used at described active hold state, close the device of at least one assembly of the transmission link of described wireless access terminal, make work period at least one assembly described in described active hold state less than the predetermined work Ct value.
2. equipment according to claim 1, wherein said predetermined work Ct value is 25%.
3. equipment according to claim 1, it further comprises causes described wireless access terminal to open the device of described at least one assembly of described transmission link in the most of the time at least in described service condition.
4. equipment according to claim 3, it further comprises causes described wireless access terminal that the device of feedback is provided to described base transceiver station with first frequency in described active hold state, and the device of feedback is provided to described base transceiver station with second frequency in described service condition, described second frequency is greater than described first frequency.
5. equipment according to claim 4, wherein said second frequency is the twice of described first frequency.
6. equipment according to claim 4, wherein said second frequency is four times of described first frequency.
7. equipment according to claim 4, wherein said feedback comprise reverse-link pilot frequency and forward link rate is controlled.
8. equipment according to claim 3, it further comprises causes described wireless access terminal to provide the once device of feedback to described base transceiver station in every eight time slots in described active hold state, and provides the once device of feedback to described base transceiver station in every four time slots in described service condition.
9. equipment according to claim 3, it further comprises causes described wireless access terminal to provide the once device of feedback to described base transceiver station in every 16 time slots in described active hold state, and provides the once device of feedback to described base transceiver station in every four time slots in described service condition.
10. equipment according to claim 1, it further comprises causes described wireless access terminal to be transitioned into the device of described active hold state from described resting state without reverse link traffic in response to having forward link traffic simultaneously.
11. a method that is used for operating the wireless access terminal of with the base transceiver station of radio net, communicating by letter, described method comprises:
In response between described wireless access terminal during the first predetermined period of time and described base transceiver station without reverse link traffic, initial transition from the service condition to the active hold state, wherein by by described wireless access terminal, oppositely sending the next initial described transition from described service condition to described active hold state of alternate code word on phase rate indicator RRI channel
In response to having reverse link traffic between described wireless access terminal and described base transceiver station, initial transition from described active hold state to described service condition,
In response to unmatched to link traffic and reverse link traffic between described wireless access terminal during at least the second predetermined period and described base transceiver station, initial transition from described active hold state to resting state,
In response to having reverse link traffic between described wireless access terminal and described base transceiver station, initial transition from described resting state to described service condition,
After being transitioned into described active hold state, there is forward link traffic simultaneously and during without reverse link traffic, cause described wireless access terminal to remain in described active hold state between described wireless access terminal and described base transceiver station, and
In described active hold state, close at least one assembly of the transmission link of described wireless access terminal, make work period at least one assembly described in described active hold state less than the predetermined work Ct value.
12. method according to claim 11, wherein said predetermined work Ct value is 25%.
13. method according to claim 12, it further comprises:
Cause described wireless access terminal to open described at least one assembly of described transmission link in the most of the time at least in described service condition.
14. method according to claim 13, it further comprises:
Provide feedback from described wireless access terminal to described base transceiver station in described active hold state, described the step of feedback is provided in described active hold state be to carry out with first frequency; And
Provide described feedback from described wireless access terminal to described base transceiver station in described service condition, described feedback is provided in described service condition step is to carry out with second frequency, and described second frequency is greater than described first frequency.
15. method according to claim 14, wherein said second frequency are the twice of described first frequency at least.
16. method according to claim 14, wherein said second frequency are four times of described first frequency at least.
17. method according to claim 14, wherein said second frequency are approximately 150 hertz, and described first frequency is approximately 75 hertz.
18. method according to claim 14, wherein said second frequency are approximately 150 hertz, and described first frequency is approximately 37.5 hertz.
19. method according to claim 14, wherein said feedback comprise reverse-link pilot frequency and speed is controlled.
20. method according to claim 14, wherein said feedback comprise data rate control (DRC).
21. comprising data source, method according to claim 14, wherein said feedback control (DSC).
22. method according to claim 13, it further comprises:
Provide once feedback from described wireless access terminal to described base transceiver station in every eight time slots in described active hold state; And
Provide once feedback from described wireless access terminal to described base transceiver station in every four time slots in described service condition.
23. method according to claim 13, it further comprises:
Provide once feedback from described wireless access terminal to described base transceiver station in every 16 time slots in described active hold state; And
Provide once feedback from described wireless access terminal to described base transceiver station in every four time slots in described service condition.
24. method according to claim 12, it further comprises:
Cause described wireless access terminal to be transitioned into described active hold state without reverse link traffic from described resting state in response to having forward link traffic simultaneously.
25. method according to claim 11, it further comprises:
From the confirmation of described base transceiver station reception to described alternate code word; And
, in response to described confirmation, make described wireless access terminal be transitioned into described active hold state.
26. an operation is used for the method for the wireless access terminal of via forward link and reverse link, with the base transceiver station of radio net, communicating by letter, described method comprises:
Cause described wireless access terminal in response to the described forward link between described wireless access terminal and described base transceiver station and the business inertia cycle on described reverse link and enter the step of resting state;
The step that causes described wireless access device to enter service condition in response to the business activity on described reverse link; And
The step that causes described wireless access terminal to enter active hold state in response to the business inertia cycle on described reverse link, no matter the business activity on described forward link how, all by sent the alternate code word on reverse rate RRI channel by described wireless access terminal, carry out the initial step that causes described wireless access terminal to enter described active hold state, at least a portion of the transmission link of described wireless access terminal is opened and closes in the described wireless access terminal that wherein is in described active hold state with the work period less than 25%.
27. one kind operates in base transceiver station in radio net to control the equipment of wireless access terminal, described equipment comprises:
be used for the device of allowance from the request that enters active hold state of described wireless access terminal, wherein said wireless access terminal produces described request in response to the business inertia cycle on the reverse link between described wireless access terminal and described base transceiver station, wherein produce described request and be included in transmission alternate code word on reverse rate RRI channel, and the described wireless access terminal that wherein is in described active hold state provides feedback to the forward link between described wireless access terminal and described base transceiver station with first frequency, and wherein said wireless access terminal provides feedback to described forward link with second frequency in service condition, described second frequency is greater than described first frequency,
Be used for when described wireless access terminal is in described active hold state the device of transmission forward link traffic.
28. equipment according to claim 27, it further comprises causes described base transceiver station to look the state of described wireless access terminal and changes the device of the lamp power control set point of described wireless access terminal, wherein for same signal/interference and noise ratio (SINR), described lamp power control set point is high in described active hold state than in described service condition.
29. equipment according to claim 27, it further causes described base transceiver to stand in the device that improves described lamp power control set point when lamp power control set point that described wireless access terminal is in described active hold state and described wireless access terminal limits lower than predetermined power.
30. equipment according to claim 27, it further comprises causes described base transceiver station to look the renewal frequency of described feedback and changes the device of the lamp power control set point of described wireless access terminal.
31. the base transceiver station in an operate wireless electric network is to control the method for wireless access terminal, described method comprises:
allowance is from the request that enters active hold state of described wireless access terminal, wherein said wireless access terminal produces described request in response to the business inertia cycle on the reverse link between described wireless access terminal and described base transceiver station, wherein produce described request and be included in transmission alternate code word on reverse rate RRI channel, the described wireless access terminal that wherein is in described active hold state provides feedback to the forward link between described wireless access terminal and described base transceiver station with first frequency, and wherein said wireless access terminal provides feedback to described forward link with second frequency in service condition, described second frequency is greater than described first frequency, and
When described wireless access terminal is in described active hold state, transport service on described forward link.
32. method according to claim 31, it further comprises causes described base transceiver station to look the state of described wireless access terminal and changes the lamp power control set point of described wireless access terminal, wherein for same signal/interference and noise ratio (SINR), described lamp power control set point is high in described active hold state than in described service condition.
33. method according to claim 31, it comprises that further causing described base transceiver to stand in when lamp power control set point that described wireless access terminal is in described active hold state and described wireless access terminal limits lower than predetermined power improves described lamp power control set point.
34. method according to claim 31, it further comprises causes described base transceiver station to look the renewal frequency of described feedback and changes the lamp power control set point of described wireless access terminal.
CN200780005760XA 2006-02-21 2007-02-21 Reduced terminal power consumption via use of active hold state Expired - Fee Related CN101385246B (en)

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US11/676,902 2007-02-20
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CN2007800062612A Expired - Fee Related CN101390324B (en) 2006-02-21 2007-02-20 Feedback channel design for multiple-input multiple-output communication systems
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CNA2007800062504A Pending CN101390323A (en) 2006-02-21 2007-02-21 Method and apparatus for arranging packets in sub-slots in wireless communication
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