KR101289601B1 - Method and apparatus for battery management in a converged wireless transmit/receive unit - Google Patents

Method and apparatus for battery management in a converged wireless transmit/receive unit Download PDF

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KR101289601B1
KR101289601B1 KR1020097002040A KR20097002040A KR101289601B1 KR 101289601 B1 KR101289601 B1 KR 101289601B1 KR 1020097002040 A KR1020097002040 A KR 1020097002040A KR 20097002040 A KR20097002040 A KR 20097002040A KR 101289601 B1 KR101289601 B1 KR 101289601B1
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South Korea
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rat
unit
battery management
power state
state change
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KR1020097002040A
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Korean (ko)
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KR20090018732A (en
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카테린 리베
광 루
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인터디지탈 테크날러지 코포레이션
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Priority to US60/799,196 priority
Priority to US82756806P priority
Priority to US60/827,568 priority
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Priority to PCT/US2007/011076 priority patent/WO2007133526A2/en
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02Power saving arrangements
    • H04W52/0209Power saving arrangements in terminal devices
    • H04W52/0212Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
    • H04W52/0216Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave using a pre-established activity schedule, e.g. traffic indication frame
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W88/00Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02Terminal devices
    • H04W88/06Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
    • 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 THIR OWN ENERGY USE
    • Y02D70/00Techniques for reducing energy consumption in wireless communication networks
    • Y02D70/10Techniques for reducing energy consumption in wireless communication networks according to the Radio Access Technology [RAT]
    • Y02D70/12Techniques for reducing energy consumption in wireless communication networks according to the Radio Access Technology [RAT] in 3rd Generation Partnership Project [3GPP] networks
    • Y02D70/122Techniques for reducing energy consumption in wireless communication networks according to the Radio Access Technology [RAT] in 3rd Generation Partnership Project [3GPP] networks in 2nd generation [2G] networks
    • Y02D70/1224Techniques for reducing energy consumption in wireless communication networks according to the Radio Access Technology [RAT] in 3rd Generation Partnership Project [3GPP] networks in 2nd generation [2G] networks in General Packet Radio Service [GPRS] networks
    • 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 THIR OWN ENERGY USE
    • Y02D70/00Techniques for reducing energy consumption in wireless communication networks
    • Y02D70/10Techniques for reducing energy consumption in wireless communication networks according to the Radio Access Technology [RAT]
    • Y02D70/12Techniques for reducing energy consumption in wireless communication networks according to the Radio Access Technology [RAT] in 3rd Generation Partnership Project [3GPP] networks
    • Y02D70/122Techniques for reducing energy consumption in wireless communication networks according to the Radio Access Technology [RAT] in 3rd Generation Partnership Project [3GPP] networks in 2nd generation [2G] networks
    • Y02D70/1226Techniques for reducing energy consumption in wireless communication networks according to the Radio Access Technology [RAT] in 3rd Generation Partnership Project [3GPP] networks in 2nd generation [2G] networks in Enhanced Data rates for GSM Evolution [EDGE] networks
    • 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 THIR OWN ENERGY USE
    • Y02D70/00Techniques for reducing energy consumption in wireless communication networks
    • Y02D70/10Techniques for reducing energy consumption in wireless communication networks according to the Radio Access Technology [RAT]
    • Y02D70/12Techniques for reducing energy consumption in wireless communication networks according to the Radio Access Technology [RAT] in 3rd Generation Partnership Project [3GPP] networks
    • Y02D70/124Techniques for reducing energy consumption in wireless communication networks according to the Radio Access Technology [RAT] in 3rd Generation Partnership Project [3GPP] networks in 3rd generation [3G] networks
    • Y02D70/1242Techniques for reducing energy consumption in wireless communication networks according to the Radio Access Technology [RAT] in 3rd Generation Partnership Project [3GPP] networks in 3rd generation [3G] networks in Universal Mobile Telecommunications Systems [UMTS] networks
    • 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 THIR OWN ENERGY USE
    • Y02D70/00Techniques for reducing energy consumption in wireless communication networks
    • Y02D70/10Techniques for reducing energy consumption in wireless communication networks according to the Radio Access Technology [RAT]
    • Y02D70/14Techniques for reducing energy consumption in wireless communication networks according to the Radio Access Technology [RAT] in Institute of Electrical and Electronics Engineers [IEEE] networks
    • Y02D70/142Techniques for reducing energy consumption in wireless communication networks according to the Radio Access Technology [RAT] in Institute of Electrical and Electronics Engineers [IEEE] networks in Wireless Local Area Networks [WLAN]
    • 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 THIR OWN ENERGY USE
    • Y02D70/00Techniques for reducing energy consumption in wireless communication networks
    • Y02D70/20Techniques for reducing energy consumption in wireless communication networks independent of Radio Access Technologies
    • Y02D70/24Techniques for reducing energy consumption in wireless communication networks independent of Radio Access Technologies in Discontinuous Reception [DRX] networks

Abstract

The present invention is a method and apparatus for minimizing power consumption in a converged WTRU. In a preferred embodiment, power consumption is minimized by coordinating battery management of the various RATs supported by the converged WTRUs. Coordinated multi-RAT battery management (CMRBM) units are used by converged WTRUs to minimize power consumption. The CMRBM unit monitors the various power and link metrics of the various RATs supported by the fused WTRUs and coordinates the power state of the fused WTRUs.

Description

TECHNICAL AND APPARATUS FOR BATTERY MANAGEMENT IN A CONVERGED WIRELESS TRANSMIT / RECEIVE UNIT}

TECHNICAL FIELD The present invention generally relates to wireless communication systems, and more particularly, to power management in converged wireless transmit / receive units (WTRUs) capable of operating across a plurality of radio access technologies (RATs).

Converged WTRUs are mobile devices capable of communicating via a plurality of radio access technologies (RATs). Converged WTRUs provide a rich set of services including mobile access to voice, email and personal information, web browsing, audio and video playback, and streaming, gaming, and the like. However, communication over multiple RATs requires a significant amount of power, resulting in fast depletion of the batteries of the converged WTRU.

In a converged WTRU, communication over multiple RATs requires the converged WTRU to transmit and receive at each of the plurality of RATs. To further solve this problem, a converged WTRU may have multiple RF chains or communicate simultaneously over multiple RATs. Since converged WTRUs are generally portable devices, it is not desirable to meet power requirements by increasing battery size. Therefore, it is desirable to minimize power consumption in converged WTRUs.

Of all the components of a converged WTRU, a transceiver generally draws the most power. Thus, the easiest way to conserve power is to turn off the transceiver or reduce its activity when not needed. This can be accomplished by placing the WTRU in dormant or discontinuous reception (DRX) mode. Each radio access technology (RAT) has its own battery saving mechanism, and generally two states are considered (sometimes different from the terms described below).

The first state is an awake state in which the radio of the WTRU is turned on. In this state, the WTRU may actively transmit or receive data. Alternatively, the WTRU may be in a power saving mode. In this mode, the WTRU generates control traffic to monitor the radio and, if necessary, switches quickly for active transmission and reception of data. The second state is a sleep state. In this state, the WTRU's radio is periodically turned off. The WTRU wakes up intermittently to receive information from the network, such as, for example, beacons in the IEEE 802.11 RAT, pilot channels in the 3rd Generation Partnership Project (3G) RAT, and the like. The network side may store addressed packets destined for the dormant WTRU in a buffer and deliver those packets when the WTRU is in a late state.

Note that the RAT protocol defines the optional power management modes required for a given technology. To illustrate, in a wireless local area network (WLAN), to reduce battery consumption of a wireless client, a client wireless device has two states: (1) an active state where the wireless client is continuously powered and actively transmits and receives (2) It will alternate between power saving states that occur when wireless clients intermittently sleep.

In an infrastructure network, WLAN access points will track the status of all associated WTRUs. These access points will buffer traffic destined for the dormant WTRU. At fixed intervals, the AP will send out a TIM (Traffic Indication Map) frame indicating which dormant WTRUs have buffered traffic waiting on the access point. A dormant WTRU will power on its receiver intermittently to receive the TIM. If the WTRU has traffic waiting, it will send a packet switched (PS) polling frame to the AP. The WTRU will wait for traffic until received, or the AP will send another TIM frame indicating there is no more buffered traffic.

In Universal Mobile Telecommunications System (UMTS) technology, the WTRU will be in one of two basic states: idle or connected. In the idle state, the WTRU is "camping on the cell." However, the WTRU may still receive signaling information such as paging. The WTRU will remain idle until a radio resource controller (RRC) connection is established. In UMTS, cell dedicated channel (CELL_DCH), cell forward access channel (CELL_FACH), cell paging channel (CELL_PCH), and UMTS terrestrial radio access technology (UTRAN) registration, each with varying degrees of communication power and power savings benefits. Various connection state modes are defined, including the area paging channel (URA_PCH).

Other access technologies have their own respective power management states and modes. The WLAN and UMTS power modes described above are merely examples and are not meant to limit the scope of the invention, which may be applied to any radio access technology if desired.

1, a prior art WTRU 110 is shown in a multi-RAT wireless environment 100. Various RATs (RAT 1 , RAT 2 , ..., RAT N ) are available for communication via their respective protocols. Converged WTRU 110 includes a plurality of RAT processing units 120 1 , 120 2 ,..., 120 N , respectively, to communicate with each of RAT 1 , RAT 2 ,..., RAT N. . The power state of each RAT processing unit 120 1 , 120 2 ,..., 120 N is controlled by each RAT battery management unit 130 1 , 130 2 ,..., 130 N. These RAT battery management units 130 1 , 130 2 ,..., 130 N manage power and resources according to their respective RAT protocols. Accordingly, the converged WTRU 110 includes a communication function through a plurality of RATs, and a function for managing power and resources according to protocols and power modes of each RAT. Other WTRU components 140 include various other components and functions, including displays, input devices, transmitters, and the like. To illustrate, when the fused WTRU 110 uses RAT 1 , the RAT 1 processing unit 120 1 provides RAT-specific protocol functionality in conjunction with other WTRU components 140, while the RAT 1 battery management unit 130 1 manages power resources and power modes.

However, the fused WTRU 110 is associated with each of the RAT processing units 120 1 , 120 2 ,..., 120 N , and associated RAT battery management units 130 1 , 130 2 ,..., 130 N. There is a lack of coordination in that they operate independently of each other. Thus, the opportunity to minimize power consumption is lost. Thus, a method and apparatus for coordinating multi-RAT battery management in a converged WTRU is desirable.

The present invention is a method and apparatus for minimizing power consumption in a converged WTRU. In a preferred embodiment, power consumption is minimized by coordinating battery management of the various RATs supported by the converged WTRUs. A coordinated multiple RAT battery management (CMRBM) unit is used by the converged WTRUs to minimize power consumption. The CMRBM unit monitors the various power and link metrics of the various RATs supported by the fused WTRU, and coordinates the power state of the fused WTRU.

A method and apparatus are provided for coordinating multi-RAT battery management in a converged WTRU.

Features and elements of the invention are described in the preferred embodiments of the particular combination. Each feature or element may be used alone (without other features and elements of the preferred embodiment) or in various combinations with or without other features and elements of the present invention.

As used herein, a WTRU includes, but is not limited to, a user equipment (UE), a mobile station, a fixed or mobile subscriber unit, a pager, or any other type of device capable of operating in a wireless environment.

2 shows a fused WTRU 210 including a CMRBM unit 220. The CMRBM unit 220 manages various RAT batteries, which in turn controls power and resource management of each RAT processing unit 240 1 , 240 2 , ..., 240 N (collectively referred to herein as reference numeral 240). Coordinate units 230 1 , 230 2 ,..., 230 N (collectively referred to herein as reference numeral 230). The multi-RAT wireless communication environment is not a way to limit the scope of the present invention but is purely an example of a general packet radio service (GPRS) network, a universal mobile telecommunication service (UMTS) network, a global system for mobile communication (GSM) network, a GERAN ( RAT 1 , RAT 2 ,..., RAT N , which may be a wireless local area network (WLAN) such as a GSM enhanced Data Rates for GSM evolution (EDGE) radio access network) and an IEEE 802.11x compatible network. Converged WTRU 210 includes other WTRU components 250, including transceivers, memory, displays, and the like.

The CMRBM unit 220 coordinates the various RAT battery management units 240 1 , 240 2 ,..., 240 N of the fused WTRU 210. To accomplish this, three general power states are preferably used by the CMRBM unit 220. In the perceptual state, the fused WTRU 210 actively transmits and / or receives data. The CMRBM perceptual state is similar to the WLAN active state and UMTS connected state described above. The second power state is a sleep state. In this dormant state, the RAT is typically powered and operated only periodically, with reduced functionality and reduced power consumption. The sleep power state is similar to the UMTS idle state described above. The third power state is off. In this off state, the RAT is fully powered down and does not periodically transmit or receive traffic.

Referring to FIG. 3, there is shown a state machine 300 used by the CMRBM unit 220 of the fused WTRU 210 of FIG. 2 to control the RAT battery management unit. In the off state 310, a given RAT processing unit is fully powered off. In the on state 320, a given RAT processing unit is powered and at least partially operating. The on state 320 further includes a perceptual mode 330 and a sleep mode 340. In the perceptual mode 330, the RAT processing unit is fully operational and can actively send data to or receive data from the network. In sleep mode 340, the RAT processing unit operates with reduced functionality. Typically, in sleep mode 340, the RAT processing unit will power off its transceiver periodically and reduce control messaging, as described above.

It should be noted that the CMRBM unit 220 power state is a generalized power state for use in coordinating multiple RAT battery management. A given RAT protocol may define various substates or modes of a given CMRBM power state. For example, an active state in a UMTS access technology includes at least four substates (URA_PCH, CELL_DCH, CELL_PCH, and CELL_FACH described above). While the CMRBM unit 220 coordinates battery management overall, the particular substate selected by the RAT battery management unit is ultimately determined by the RAT battery management unit according to its respective RAT protocol. This is not limited to the perceptual mode 330 alone, and includes the CMRBM sleep mode 340 as well as various other power management details unique to the individual RAT protocol.

Still referring to FIG. 3, the state change is indicated by a dashed line. The RAT battery management unit may change from the off state 310 to the on state 320 through the reception of a state change request, and vice versa. While in the on state, the RAT battery management unit will alternate between the perceptual mode 330 and the sleep mode 340 by the state change request. Alternatively, the RAT battery management unit can unilaterally change its state or mode based on its respective RAT protocol and battery management configuration.

Referring again to FIG. 2, the CMRBM unit 220 preferably includes various RAT battery management units 240 1 , 240 of the fused WTRU 210 via a messaging primitive described in detail, for example, in Table 1 below. 2 , ..., 240 N ). Other primitives may also be used, and the primitives discussed below may include additional information elements, if desired, than are explicitly quoted in the description.


Primitive

direction

Explanation

Status change request
CMRBM Unit-> RAT Battery Management Unit The CMRBM unit requests the RAT battery management unit to change the power state. Note that the execution of the request ultimately depends on the RAT battery management unit. For example, in UMTS RAT, the WTRU may not enter a dormant state voluntarily; It is a decision of the network. If a substate exists, that substate is also displayed.

Status change indication
CMRBM Unit <-RAT Battery Management Unit The RAT battery management unit indicates whether the state has changed. The state change may be the result of a state change request from the CMRBM unit or may be a voluntary state change initiated by the RAT battery management unit based on the RAT protocol. The new status is indicated in the message.

Request Status Information
CMRBM Unit <-RAT Battery Management Unit The RAT battery management unit voluntarily requests the CMRBM unit to confirm the state change before entering a new state. The new status is indicated in the message.

Status information response
CMRBM Unit-> RAT Battery Management Unit In response to the status information request, the CMRBM unit responds by indicating the confirmed status. Note that the ultimate state decision is up to the RAT battery management unit. The RAT battery management unit preferably notifies the CMRBM unit of the selected status via a status change indication message.

Turn-on request
CMRBM Unit-> RAT Battery Management Unit This command allows the CMRBM unit to turn on the RAT battery management unit and then turn on the RAT processing unit.

Turn-off request
CMRBM Unit-> RAT Battery Management Unit This command allows the CMRBM unit to turn off the RAT battery management unit and then turn off the RAT processing unit.

Configuration reporting
CMRBM Unit <-RAT Battery Management Unit The RAT battery management unit provides the CMRBM unit with internal configuration parameters regarding its current power state.

Configuration request
CMRBM Unit-> RAT Battery Management Unit
The CMRBM unit uses this primitive to customize the power state parameters of the RAT to optimize power consumption.

4 is a flow diagram 400 of a method for coordinating multiple RAT battery management in the converged WTRU of FIG. 2. The CMRBM unit 220 monitors the various signal and link metrics of the RAT, as well as the various RAT battery management units 240 1 , 240 2 ,..., 204 N included in the fused WTRU 210 (step) 410). Based on this monitoring, the CMRBM unit 220 determines whether a state or mode change of any of the RAT battery management units is desired (step 420). This determination may be based on any principle for minimizing battery power of the fused WTRU 220. For example, when there is no network of a given RAT available, such as RAT 1 , it may be desirable to put the corresponding RAT battery management unit 230 1 and the RAT processing unit 240 1 in off mode to conserve power. will be. Likewise, if the network is available, the RAT battery management unit 230 1 and the RAT processing unit 240 1 may be placed in an on mode. Alternatively, when the fused WTRU 210 detects a low battery power level, it may be placed in the off mode permanently or periodically to conserve battery power.

Alternatively, a user of fused WTRU 210 may configure CMRB unit 220 to adjust the power mode and state as desired. Alternatively, the CMRBM unit 220 may request a state change of the RAT battery management unit 230 from a sleep mode to a late mode. Or when handover to this RAT is imminent, as will be discussed in more detail below with reference to FIG. 6, to reject the change to the sleep mode of the RAT battery management unit 230 based on its respective power management protocol. You can ask. The CMRBM may use the link quality metric to affect the state change of any RAT. For example, when the WTRU 210 is connected to several RATs and the link quality is good on these RATs, the CMRBM may request that the RAT change its state to sleep mode or vice versa.

If the CMRBM unit 220 determines that a state or mode change is required at step 420, the CMRBM unit 220 requests the RAT battery management unit 230 to change state or mode (step 430). Preferably, CMRBM unit 220 uses the primitives defined in Table 1 above for requesting a state change. Specifically, the CMRBM unit 220 transmits a "state change request" message to the RAT battery management unit 230 when a state or mode change is requested. Upon receipt of this state change request, the RAT battery management unit 230 indicates whether or not to follow the request based on the RAT specific protocol, and preferably a "state change indication" message confirming its current state. Send (step 440).

When a particular RAT changes mode (e.g., from perceptive mode to dormant mode, or vice versa), the network typically has traffic destined for its converged WTRU 210, as described above or for other reasons, The mode or state change is informed to be buffered by the network. To accomplish this, a RAT-specific protocol is used to synchronize the power mode with the network.

If no state change is desired by the CMRBM unit 220 in step 420, it is determined whether any RAT battery management unit 230 wants a state change (step 450). The RAT battery management unit 230 makes an independent decision about its state based on the RAT-specific protocol. If no RAT battery management unit 230 wants to change state, the method returns to step 410 for further monitoring. If the RAT battery management unit 230 wants to change state, the RAT battery management unit 230 requests the CMRBM unit 220 to allow the state change (step 460). Preferably, the request is a "status request" primitive detailed in Table 1 above. Upon receipt of this state change request, the CMRBM unit 220 determines whether to allow the state change request and signals it to the requesting RAT battery management unit 230 (step 470). Preferably, the CMRBM unit 220 signals to the requesting RAT battery management unit 230 using the "Status Information Response" message detailed in Table 1 above. The CMRBM unit 220 may allow or disallow the requested state change, and the requesting RAT battery management unit 230, whether granted or denied by the CMRBM unit 220, requests the request. Note that you can proceed with the changed state.

In another embodiment, referring to FIG. 5, a flow diagram 500 of one method for coordinating multiple RAT battery management in a converged WTRU 210 is shown. When the fused WTRU 210 is powered on (step 510), each RAT battery management unit 230 notifies the CMRBM unit 220 of its respective battery management configuration (step 520). Preferably, the RAT battery management unit 230 sends a "configuration report" message defined in Table 1 above to the CMRBM unit 220. Note that the initial battery management configuration is specified by the particular RAT protocol. The CMRBM unit 220 then edits the report and determines the need to request a state change of any of the RAT battery management units 230 to minimize power consumption (step 530). If the CMRBM unit 210 determines that no state change is required (ie, the fused WTRU 210 is currently operating at an optimal power configuration), the method proceeds to step 550. On the other hand, if the CMRBM unit 220 determines that a state change is desired (i.e., determines that the fused WTRU 210 may be more efficiently configured), then the CMRBM unit 220 requests the RAT battery management unit to change state. Request 230 (step 540). Preferably, this request is in the form of a "configuration request" message defined in Table 1 above. The RAT battery management unit 230 that has requested the state change can voluntarily determine whether to change the state based on its native RAT protocol. The selected state will be indicated by the RAT battery management unit 230 in the next configuration report. Optionally, the various RAT battery management units 230 repeat the configuration report periodically (step 550). This periodic report may be a fixed interval or dynamically adjusted based on user control or CMRBM unit 220.

In addition to the methods described above with reference to FIGS. 4 and 5, the CMRBM unit 220 may request the RAT battery management unit 230 to completely power down to shut down each RAT processing unit 240. This is preferably accomplished by sending a "turn off request" message as defined in Table 1 above. Similarly, the CMRBM unit 220 may request the RAT battery management unit 230 in a power down state to turn on. This is preferably accomplished by sending a "turn on request" message as defined in Table 1 above. The converged WTRU 210 may power on / power off the RAT battery management unit 230 and, accordingly, the corresponding RAT processing unit 240 in various situations to save power. For example, if there is no network to scan, when the power supply is below a predetermined threshold, or if the user has not used a particular RAT network for a predetermined time, the CMRBM unit 220 may use the RAT battery management unit 230. ) May turn off the RAT processing unit 240.

In another embodiment, CMRBM unit 220 provides efficient power management of the various access technologies of converged WTRU 210 during inter-RAT handover. In this embodiment, referring to FIG. 6, the CMRBM unit 220 is associated with the inter-RAT handover policy function of the converged WTRU 210 to improve the execution of the inter-RAT handover by reducing the handover delay. It works. The CMRBM unit 220 of the fused WTRU 210 monitors various RAT battery management units 230 and RAT signal quality and power management metrics (step 610). Based on the inter-RAT handover policy of the converged WTRU 210, it is determined whether inter-RAT handover is desired (step 620). For example, it would be desirable to transition an active session from a RAT network with low or diminishing link quality to a RAT network with strong or improving link quality. When it is determined in step 620 that handover is desired, it is determined whether the target RAT processing unit (s) 240 is in a perceptual state (step 630). If the target RAT processing unit (s) is not in the late state, the CMRBM unit 220 places the target RAT (s) processing unit (s) 240 in an appropriate perceptual state for handover. Signal to battery management unit (s) 230 (step 640). This is achievable by the method described above with reference to FIGS. 4 and 5 (ie, individual RAT signaling or configuration reporting). When the target RAT processing unit (s) are in the perceptual state, the fused WTRU 210 performs an inter-RAT handover (step 650). Finally, the CMRBM unit 220 signals to the various RAT battery management units 230 in the fused WTRU 210 to achieve a minimum power consumption configuration (step 660).

For example, when the converged WTRU 210 is active using the first RAT processing unit 210 1 , but the CMRBM unit 220 detects a decreasing link quality (ie, indicating handover in advance). Determined), the CMRBM unit 220 may include a second RAT battery management unit 230 2 or a plurality of other RAT battery management units 230 2 ,..., 230 N , and corresponding RATs that are currently dormant. Request processing units 240 2 ,..., 240 N to change to a late state. The CMRBM unit 220 uses the first RAT processing unit 240 1 to determine the best link quality or the best link quality of the RAT processing units 240 2 ,..., 240 N. RAT processing units 240 2 ,..., 240 N may be selected. In this way, the handover target RAT is in a perceptual state and ready to receive traffic, thereby minimizing handover delay.

Examples

1. A method for minimizing power consumption in a converged wireless transmit / receive unit (WTRU) capable of transmitting and receiving through a plurality of radio access technologies (RATs).

Providing a plurality of RAT-specific battery management units for each of the plurality of RATs of the WTRU.

2. The method of embodiment 1 further comprising monitoring power configurations of the plurality of RAT battery management units.

3. The method of embodiment 2 further comprising determining whether a power state change is desired.

4. The method of embodiment 3 wherein the power state change is desired to minimize power consumption of the WTRU.

5. The method of embodiment 3 or 4 further comprising requesting a change in power state of the RAT battery management unit based on the determination.

6. The method of embodiment 5 further comprising receiving the power state change request at a RAT battery management unit.

7. The method of embodiment 6 further comprising determining at the RAT battery management unit whether to execute the requested power state change based on the battery management protocol of the RAT battery management unit.

8. The method of embodiment 5-7, further comprising the RAT battery management unit indicating compliance with the power state change request.

9. The method of embodiment 3-8, wherein determining whether power state change is desired is further based on the link quality metric.

10. The method of embodiment 9 wherein if the link quality metric of the RAT is below a predetermined threshold, a change in power state of the RAT battery management unit associated with the RAT is requested.

11. The method of embodiment 3-10, further comprising each RAT battery management unit reporting its power management configuration, wherein determining whether a power state change is desired is based on the report. How to minimize power consumption.

12. The method of embodiment 11 wherein the report is repeated periodically by each RAT battery management unit.

13. In Examples 1-12,

Determining at each RAT battery management unit whether a power state change is desired;

Requesting permission to change the power state when the determination is positive

Further comprising, power consumption minimization method.

14. The method of embodiment 13 further comprising changing a power state in a RAT battery management unit desiring to change state upon receipt of a grant.

15. The method of embodiment 3-14, wherein the determination as to whether a power state change is required is based on user preference.

16. The method of embodiment 3-15, wherein the determination as to whether power state change is required is based on the data rates of the plurality of RATs.

17. The method of embodiments 3-16, wherein the determination of whether a power state change is required is based on an inter-RAT handover policy of the converged WTRU.

18. A converged wireless transmit / receive unit (WTRU),

Transceiver; And

A plurality of radio access technology (RAT) processing units, wherein each RAT processing unit is associated with a transceiver configured to transmit and receive via a different RAT;

 Fusion wireless transmission and reception unit comprising a.

19. The converged wireless transmit / receive unit of embodiment 18 further comprising a plurality of RAT battery management units, one for each RAT processing unit.

20. The converged wireless transmit / receive unit of embodiment 19 wherein each of the plurality of RAT management units is configured to control a power state of each RAT processing unit.

21. The converged wireless transmit / receive unit of embodiments 18-20, further comprising a coordinated multiple RAT battery management (CMRBM) unit configured to tune each of the plurality of RAT battery management units to minimize power consumption. .

22. The converged wireless transmit / receive unit of embodiment 21 wherein the CMRBM unit is configured to monitor power configuration of the plurality of RAT battery management units.

23. The converged wireless transmit / receive unit of embodiment 22 wherein the CMRBM unit is further configured to determine whether a power state change is desired to minimize power consumption of the WTRU based on the monitoring.

24. The converged wireless transmit / receive unit of embodiment 23 wherein the CMRBM unit is further configured to request a power state change of the RAT battery management unit based on the determination.

25. The fused wireless transmit / receive unit of embodiments 21-24, wherein each RAT battery management unit is configured to receive a power state change request from the CMRBM unit.

26. The converged wireless transmit / receive unit of embodiment 25 wherein each RAT battery management unit is further configured to determine whether to execute the requested power state change based on the protocol of the RAT battery management unit.

27. The converged wireless transmit / receive unit of embodiment 25 or embodiment 26, wherein each RAT battery management unit is further configured to indicate compliance with the power state change request to the SMRBM unit.

28. The converged wireless transmit / receive unit of embodiments 21-24, wherein the CMRBM unit is further configured to determine whether a power state change is desired based on a link quality metric.

29. The system of embodiments 21-24, or 28, wherein the CMRBM unit is further configured to request a change in power state of the given RAT battery management unit when the link quality metric of the given RAT is below a predetermined threshold. In, converged wireless transmission and reception unit.

30. The converged wireless transmit / receive unit of embodiments 21-24 or 28-29, wherein the CMRBM unit is further configured to determine whether a power state change is desired based on the report.

31. The converged wireless transmit / receive unit of embodiments 25-27, wherein each RAT battery management unit is further configured to report its power management configuration.

32. The converged wireless transmit / receive unit of embodiment 31 wherein the report is repeated periodically.

33. The converged wireless transmit / receive unit of embodiments 25-27, or 31-32, wherein each RAT battery management unit is configured to determine whether a power state change is desired.

34. The method of embodiments 25-27, or 31-33, wherein each RAT battery management unit is configured to request the CMRBM unit to allow for power state change when the determination is positive. unit.

A more detailed understanding of the invention may be obtained from the following detailed description, given by way of example, which may be understood in conjunction with the accompanying drawings.

1 illustrates conventional battery management in a converged WTRU.

2 illustrates a converged WTRU including a coordinated multi-RAT battery management unit in accordance with a preferred embodiment of the present invention.

3 is a state machine diagram of possible power modes of the fused WTRU of FIG. 2.

4 is a flowchart of a method for coordinating multiple RAT battery management in the converged WTRU of FIG. 2.

5 is a flowchart of a method for coordinating multi-RAT battery management using a configuration report.

6 is a flowchart of a method for coordinating multiple RAT battery management during inter-RAT handover.

Claims (33)

  1. A method for minimizing power consumption in a converged wireless transmit / receive unit (WTRU) capable of transmitting and receiving through a plurality of radio access technologies (RAT), the wireless transmit / receive unit is Wireless transmit / receive having a coordinated multiple RAT battery management (CMRBM) unit, a plurality of RAT processing units, one for each of the plurality of RATs, and a RAT-specific battery management unit for each of the plurality of RATs In the method of minimizing the power consumption of the unit,
    Monitoring, by the CMRBM unit, the power configuration of the plurality of RAT battery management units;
    Determining, by the CMRBM unit, whether to desire a power state change to minimize power consumption of the wireless transmit / receive unit based on the monitoring;
    Sending, by the CMRBM unit, a power state change request to a RAT battery management unit based on the determination; And
    And selecting, by the RAT battery management unit, a particular substate of a power state in response to the power state change request from the CMRBM unit in accordance with a corresponding RAT protocol.
  2. The method of claim 1,
    Determining, by the RAT battery management unit, whether to execute the requested power state change based on a battery management protocol of the RAT battery management unit;
    Also included, a method for minimizing power consumption in a wireless transmit / receive unit.
  3. 3. The method of claim 2, further comprising indicating that the RAT battery management unit responds to the power state change request.
  4. The method of claim 1, wherein determining whether the power state change is desired is further based on a link quality metric.
  5. 5. The method of claim 4, wherein the power state is changed under the condition that the link quality metric of the RAT is below a predetermined threshold.
  6. The wireless transmit / receive unit of claim 1, wherein each RAT battery management unit also includes reporting its power management configuration, and wherein determining whether a power state change is desired is based on the report. To minimize power consumption.
  7. 7. The method of claim 6, wherein the report is repeated periodically by each RAT battery management unit.
  8. The method of claim 1,
    Determining at each RAT battery management unit whether or not a power state change is desired; And
    Requesting the CMRBM unit for permission to change the power state under the condition that the determination is positive;
    Also included, a method for minimizing power consumption in a wireless transmit / receive unit.
  9. 10. The method of claim 8, further comprising changing a power state in a RAT battery management unit that desires to change state upon receiving the grant.
  10. The method of claim 1, wherein the determination of whether a power state change is desired is based on user preference.
  11. The method of claim 1, wherein the determination of whether a power state change is desired is based on data rates of the plurality of RATs.
  12. The method of claim 1, wherein the determination of whether a power state change is desired is based on an inter-RAT handover policy of the converged wireless transmit / receive unit.
  13. In a converged wireless transmit / receive unit (WTRU),
    Transceiver;
    A plurality of radio access technology (RAT) processing units, each RAT processing unit associated with the transceiver configured to transmit and receive over a different RAT according to a separate RAT protocol;
    A plurality of RAT battery management units, one for each RAT processing unit, said plurality of RAT battery management units configured to control a power state of each RAT processing unit;
    Monitor a power configuration of the plurality of RAT battery management units, determine whether a power state change is desired to minimize power consumption of the wireless transmit / receive unit based on the monitoring, and based on the determination, a RAT battery management unit A coordinated multiple RAT battery management (CMRBM) unit configured to send a power state change request to
    The RAT battery management unit is further configured to select a particular substate of a power state in response to the power state change request from the CMRBM unit in accordance with a corresponding RAT protocol.
  14. 15. The converged wireless transmit / receive unit of claim 13 wherein each RAT battery management unit is configured to determine whether to execute the requested power state change based on a protocol of a RAT battery management unit.
  15. 15. The converged wireless transmit / receive unit of claim 14 wherein each RAT battery management unit is further configured to indicate to the CMRBM unit that responds to the power state change request.
  16. 14. The converged wireless transmit / receive unit of claim 13, wherein the CMRBM unit is further configured to determine whether a power state change is desired based on a link quality metric.
  17. 17. The converged wireless transmit / receive unit of claim 16, wherein the CMRBM unit is further configured to request a change in power state of a given RAT battery management unit under the condition that the link quality metric of a given RAT is below a predetermined threshold. .
  18. The unit of claim 13, wherein each RAT battery management unit is further configured to report its power management configuration.
  19. 19. The converged wireless transmit / receive unit of claim 18 wherein the report is repeated periodically.
  20. 19. The converged wireless transmit / receive unit of claim 18, wherein the CMRBM unit is further configured to determine whether a power state change is desired based on the report.
  21. The method of claim 13, wherein each RAT battery management unit,
    Determine whether you want to change the power state,
    Request the CMRBM unit for permission to change the power state under the condition that the determination is positive
    And a configured wireless transmit / receive unit.
  22. A machine-readable storage medium having a series of stored instructions executable by a converged wireless transmit / receive unit (WTRU) to provide coordinated multiple radio access technology battery management, comprising:
    The wireless transmit / receive unit may transmit and receive via a plurality of RATs according to an individual radio access technology (RAT) protocol,
    The instructions,
    Instructions for monitoring power configurations of the plurality of RAT battery management units by a coordinated multiple RAT battery management (CMRBM) unit;
    Instructions by the CMRBM unit to determine whether a power state change is desired to minimize power consumption of the wireless transmit / receive unit based on the monitoring;
    Instructions for sending, by the CMRBM unit, a power state change request to a RAT battery management unit based on the determination; And
    Instructions for selecting, by the RAT battery management unit, a particular substate of a power state in response to the power state change request in accordance with a corresponding RAT protocol.
  23. 23. The machine-readable storage medium of claim 22, further comprising instructions to determine by the RAT battery management unit whether to execute the requested power state change based on a battery management protocol of the RAT battery management unit. .
  24. The machine-readable storage medium of claim 23, further comprising instructions for indicating that the RAT battery management unit responds to the power state change request.
  25. 23. The machine-readable storage medium of claim 22, wherein the determination of whether the power state change is desired is based on a link quality metric.
  26. 27. The method of claim 25, wherein the CMRBM unit determines whether the link quality metric of the RAT is below a predetermined threshold, and requests a change in power state of the RAT battery management unit associated with the RAT under the condition that the determination is positive. And a computer readable storage medium.
  27. 23. The machine of claim 22, wherein each RAT battery management unit also includes instructions for reporting its power management configuration, and the determination of whether or not a power state change is desired is based on the report. Possible storage medium.
  28. 28. The machine-readable storage medium of claim 27 wherein each RAT battery management unit also includes instructions for periodically reporting a power management configuration.
  29. 23. The method of claim 22, wherein each RAT battery management unit determines whether or not a power state change is desired, and the RAT battery management unit requests permission from the CMRBM unit to change the power state under the condition that the determination is positive. A machine readable storage medium also comprising instructions.
  30. 30. The machine-readable storage medium of claim 29, further comprising instructions for changing a power state in a RAT battery management unit that desires to change state when receiving the grant from the CMRBM unit.
  31. 23. The machine-readable storage medium of claim 22 wherein the determination as to whether a power state change is desired is based on user preference.
  32. 23. The machine-readable storage medium of claim 22, wherein the determination of whether a power state change is desired is based on data rates of the plurality of RATs.
  33. 23. The machine-readable storage medium of claim 22, wherein the determination as to whether the power state change is desired is based on an inter-RAT handover policy of the converged wireless transmit / receive unit.
KR1020097002040A 2006-05-10 2007-05-08 Method and apparatus for battery management in a converged wireless transmit/receive unit KR101289601B1 (en)

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