WO2008028325A1 - Method for improving power saving performance of user equipment and ue - Google Patents

Method for improving power saving performance of user equipment and ue Download PDF

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Publication number
WO2008028325A1
WO2008028325A1 PCT/CN2006/002214 CN2006002214W WO2008028325A1 WO 2008028325 A1 WO2008028325 A1 WO 2008028325A1 CN 2006002214 W CN2006002214 W CN 2006002214W WO 2008028325 A1 WO2008028325 A1 WO 2008028325A1
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WO
WIPO (PCT)
Prior art keywords
state
cell
ura
update
cause set
Prior art date
Application number
PCT/CN2006/002214
Other languages
French (fr)
Inventor
Michael Roberts
Original Assignee
Huawei Technologies Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Priority to PCT/CN2006/002214 priority Critical patent/WO2008028325A1/en
Publication of WO2008028325A1 publication Critical patent/WO2008028325A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
    • H04W52/0216—Power 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
    • H04W52/0219—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave where the power saving management affects multiple terminals
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to the radio resource control technique, more specifically to a method for improving power saving performance of User Equipment (UE) and a UE.
  • UE User Equipment
  • Universal Mobile Terrestrial System supports CELLJPCH and URA-PCH mobility states, in these states the UE is required to signal its change of cell or Universal Terrestrial Radio Access Network (UTRAN) Registration Area (URA) at each point in time it changes. In order to do this the UE sends a CELL UPDATE or URA UPDATE message and then transits to CELLJFACH state to receive instructions as to which state to go to next.
  • UTRAN Universal Terrestrial Radio Access Network
  • URA Universal Terrestrial Radio Access Network
  • the next state for the UE is almost always the same.
  • Rel-7 of the 3GPP standard requires supporting Gaming over Internet Protocol (GoIP) and Push to talk over Cellular (PoC). These new services require that a UE is kept continuously connected and remains in state like CELL-PCH or URA_PCH for longer periods of time. This means that the UE will transit more often into the CELL-FACH state where the UE is required to decode all downlink frames on the Forward Access Channel (FACH), this will decrease the autonomy of the UE battery.
  • GoIP Internet Protocol
  • PoC Push to talk over Cellular
  • the present invention provides a method for improving the- power saving performance of UE and a UE.
  • the method for improving power saving performance of a UE includes the following steps: creating a state keeping cause set for a UE; when detecting that an update event is triggered by a reason included in the state keeping cause set, sending, by the UE, an update indication to a Universal Terrestrial Radio Access Network (UTRAN) and remaining in the current state.
  • UTRAN Universal Terrestrial Radio Access Network
  • the UE includes: a detecting unit, for detecting an update event of the UE; a judging unit, for judging whether the update event is triggered by a reason included in a state keeping cause set; a processing unit, for sending an update indication to a Universal Terrestrial Radio Access Network (UTRAN) and remaining in the current state when determined that the update event is triggered by the reason included in the state keeping cause set.
  • a detecting unit for detecting an update event of the UE
  • a judging unit for judging whether the update event is triggered by a reason included in a state keeping cause set
  • a processing unit for sending an update indication to a Universal Terrestrial Radio Access Network (UTRAN) and remaining in the current state when determined that the update event is triggered by the reason included in the state keeping cause set.
  • UTRAN Universal Terrestrial Radio Access Network
  • the UE for the UE in CELL_PCH or URA_PCH state, if the UE detects cell change of URA change and the cause of cell change or URA change is included in a preset state keeping cause set, it sends to the UTRAN the cell update indication or URA update indication and remains in CELL_PCH or URA_PCH state, without transiting to CELLJFACH state. Since the UE does not move to CELLJFACH state and then return back to CELL_PCH or URA_PCH state again, the autonomy of the UE battery is increased. Therefore, the power saving performance of the UE is increased.
  • Figure 1 is a schematic diagram of RRC states and State Transitions.
  • Figure 2a is a flow chart of improving power saving performance in accordance with the first embodiment of the present invention.
  • Figure 2b is a message sequence chart of improving power saving performance in accordance with the first embodiment of the present invention.
  • Figure 3a a flow chart of improving power saving performance in accordance with the second embodiment of the present invention.
  • Figure 3b is a message sequence chart of improving power saving performance in accordance with the second embodiment of the present invention.
  • Figure 4 is a structure diagram of the UE in accordance with an embodiment of the present invention.
  • Figure 5 is a structure diagram of the UE in accordance with another embodiment of the present invention.
  • a UE in UTRAN Radio Resource Control (RRC) connected mode, a UE could be stayed in four states: CELL_DCH state, CELLJFACH state, CELL_PCH state and URA_PCH state.
  • RRC Radio Resource Control
  • the UE in CELL_DCH state occupy dedicated channel to transmit a large amount of data.
  • the UE in CELLJFACH state can use Random Access Channel (RACH) and FACH to transmit a small amount of data.
  • RACH Random Access Channel
  • the UE in CELLJPCH state or URAJPCH state can only listen to Broadcast Channel (BCH), and in case that a cell update event or a URA update event is triggered the UE can be automatically moved to CELLJFACH state to send CELL UPDATE message or URA UPDATE message to the UTRAN.
  • BCH Broadcast Channel
  • the UE in CELLJ 5 CH or URA_PCH state remains in its state in some cases of cell change or URA change.
  • CELLJPCH state the UE sends a cell update indication to the UTRAN in order to signal the change to UTRAN and maintain the mobility state in the UTRAN, the UE stays in CELLJPCH state in some cases.
  • this embodiment includes the following steps:
  • Step 201 Create a state keeping cause set for a UE in CELL_PCH state, in this embodiment, the state keeping cause set includes the following reasons: cell change, periodic cell change, periodic traffic volume measurement and re-entering service area.
  • Step 202 When a UE in CELL_PCH state detects a cell update event, the UE decides whether the cell update event is triggered by a reason included in the preset state keeping cause set, and if yes, proceeds to step 203; otherwise, proceeds to step 204.
  • Step 203 The UE sends a CELL UPDATE message containing a cell update indication to the UTRAN through RACH, and remains in CELLJPCH state. While in CELL_PCH state, the UE can perform cell reselection.
  • Step 204 The UE transits to CELLJFACH state to send a CELL UPDATE message to the UTRAN, waiting for returned instructions from the UTRAN.
  • the cell update indication is carried in the CELL UPDATE message. Obviously, the cell update indication can be also carried in a new created message.
  • the UE in CELL_PCH state sends a cell update indication to the UTRAN using RACH when the cell update event is triggered by such reasons as cell change, periodic cell change, periodic traffic volume measurement and re-entering service area.
  • URA_PCH state the UE sends a URA update indication to the UTRAN in order to signal the change to UTRAN and maintain the mobility state in the UTRAN, the UE stays in URA_PCH state in some cases.
  • this embodiment includes the following steps:
  • Step 301 Create a state keeping cause set for a UE in URA-PCH state, in this embodiment, the state keeping cause set includes the following reasons: periodic URA change, periodic (URA) traffic volume measurement and re-entering service area.
  • periodic URA change periodic (URA) traffic volume measurement
  • URA periodic
  • Step 302 When a UE in URA_PCH state detects a URA update event, the UE decides whether the URA update event is triggered by a reason included in the preset state keeping cause set, and if yes, proceeds to step 303; otherwise, proceeds to step 304.
  • Step 303 The UE sends a URA UPDATE message containing a URA update indication to the UTRAN through RACH, and remains in URA_PCH state. While in UARJUPD ATE state, the UE can perform cell reselection.
  • Step 304 The UE transits to CELLJFACH state to send a URA UPDATE message to the UTRAN, waiting for returned instructions from the UTRAN.
  • the URA update indication is carried in the URA UPDATE message. Obviously, the URA update indication can be also carried in a new created message.
  • the UE in URAJPCH state sends a URA update indication to the UTRAN using RACH when the URA update event is triggered by such reasons as periodic URA change, periodic (URA) traffic volume measurement and re-entering service area.
  • the RACH is used to send the cell update indication or URA update indication.
  • RACH is rare and should not cause any significant degradation in service quality.
  • the UTRAN can page the UE on a cell or a URA.
  • the UE for the UE in CELLJPCH or URA_PCH state, if the UE detects that a cell update event or URA update event is triggered by reasons included in a preset state keeping cause set, it sends to the UTRAN the cell update indication or URA update indication and remains in CELLJPCH or URA_PCH state, without transiting to CELLJFACH state. Since the UE does not move to CELLJFACH state and then return back to CELLJPCH or URA_PCH state again, the autonomy of the UE battery is increased. Therefore, the power saving performance of the UE is increased.
  • the autonomy of the UE battery is increased.
  • the amount of increase depends very much on the mobility profile of the UE and the parameterization of the network.
  • a UE includes a detecting unit, a judging unit and a processing unit, as shown in Figure 4.
  • the detecting unit detects an update event of the UE in a state.
  • the judging unit judges whether the update event is triggered by a reason included in a state keeping cause set, which is configured for the UE and used for determining whether the UE remains in its original state.
  • the processing unit sends an update indication to a UTRAN and remains in the state when determined that the update event is triggered by the reason included in the state keeping cause set.
  • the UE further includes a storing unit.
  • the storing unit stores the state keeping cause set and provides the state keeping cause set for the judging unit by request.
  • the update event is a cell update event
  • the update indication is a cell update indication
  • the state keeping cause set includes at least one of: cell change, periodic cell change, periodic traffic volume measurement and re-entering service area.
  • the update event is a URA update state
  • the update indication is a URA update indication
  • the state keeping cause set includes at least one of: periodic URA change, periodic traffic volume measurement and re-entering service area.
  • the UE includes a detecting unit, a judging unit, a processing unit and a storing unit.
  • the detecting unit includes a first detecting module for detecting a cell update event of the UE in CELL_PCH state and a second detecting module for detecting a URA update event of the UE in URA_PCH state.
  • the storing unit includes a first storing module for storing a first state keeping cause set for the UE in CELLJPCH state and a second storing module for storing a second state keeping cause set for the UE in URA_PCH state.
  • the judging unit includes a first judging module for judging whether the cell update event is triggered by a reason included in a first state keeping cause set and a second judging module for judging whether the URA update event is triggered by a reason included in a second state keeping cause set.
  • the processing unit includes a first processing module for sending a cell update indication to the UTRAN and remaining in CELL_PCH state after the first judging unit determines that the cell update event is triggered by the reason included in the first state keeping cause set and a second processing module for sending a URA update indication to the UTRAN and remaining in URA_PCH state after the second judging unit determines that the URA update event is triggered by the reason included in the second state keeping cause set.

Abstract

The present invention discloses a method for improving power saving performance of UE, comprising: creating a state keeping cause set for the UE in CELL PCH state or URA PCH state; when the UE detecting that a cell update event or a URA update event is triggered by a reason included in the state keeping cause set, sending a cell update indication or a URA update indication to a UTRAN and remaining in CELL PCH state or URA PCH state. By the present invention, the autonomy of UE battery is increased, thereby increasing the power saving performance of the UE.

Description

Method for Improving Power Saving Performance of User Equipment and UE
Field of the technology
The present invention relates to the radio resource control technique, more specifically to a method for improving power saving performance of User Equipment (UE) and a UE.
Background of the invention
Universal Mobile Terrestrial System (UMTS) supports CELLJPCH and URA-PCH mobility states, in these states the UE is required to signal its change of cell or Universal Terrestrial Radio Access Network (UTRAN) Registration Area (URA) at each point in time it changes. In order to do this the UE sends a CELL UPDATE or URA UPDATE message and then transits to CELLJFACH state to receive instructions as to which state to go to next.
For example, in the cases where the reason is: cell change, periodic cell update, periodic URA update, periodic traffic volume measurement reports, re-entering service area, the next state for the UE is almost always the same.
Rel-7 of the 3GPP standard requires supporting Gaming over Internet Protocol (GoIP) and Push to talk over Cellular (PoC). These new services require that a UE is kept continuously connected and remains in state like CELL-PCH or URA_PCH for longer periods of time. This means that the UE will transit more often into the CELL-FACH state where the UE is required to decode all downlink frames on the Forward Access Channel (FACH), this will decrease the autonomy of the UE battery.
Summary
The present invention provides a method for improving the- power saving performance of UE and a UE.
The method for improving power saving performance of a UE includes the following steps: creating a state keeping cause set for a UE; when detecting that an update event is triggered by a reason included in the state keeping cause set, sending, by the UE, an update indication to a Universal Terrestrial Radio Access Network (UTRAN) and remaining in the current state.
The UE includes: a detecting unit, for detecting an update event of the UE; a judging unit, for judging whether the update event is triggered by a reason included in a state keeping cause set; a processing unit, for sending an update indication to a Universal Terrestrial Radio Access Network (UTRAN) and remaining in the current state when determined that the update event is triggered by the reason included in the state keeping cause set.
As can be seen from the above mentioned scheme, for the UE in CELL_PCH or URA_PCH state, if the UE detects cell change of URA change and the cause of cell change or URA change is included in a preset state keeping cause set, it sends to the UTRAN the cell update indication or URA update indication and remains in CELL_PCH or URA_PCH state, without transiting to CELLJFACH state. Since the UE does not move to CELLJFACH state and then return back to CELL_PCH or URA_PCH state again, the autonomy of the UE battery is increased. Therefore, the power saving performance of the UE is increased.
Brief Description of the Drawings
Figure 1 is a schematic diagram of RRC states and State Transitions.
Figure 2a is a flow chart of improving power saving performance in accordance with the first embodiment of the present invention.
Figure 2b is a message sequence chart of improving power saving performance in accordance with the first embodiment of the present invention.
Figure 3a a flow chart of improving power saving performance in accordance with the second embodiment of the present invention.
Figure 3b is a message sequence chart of improving power saving performance in accordance with the second embodiment of the present invention.
Figure 4 is a structure diagram of the UE in accordance with an embodiment of the present invention.
Figure 5 is a structure diagram of the UE in accordance with another embodiment of the present invention.
Embodiments of the Invention
The present invention is hereinafter described in detail with reference to the accompanying drawings and the embodiments so that the solution and merits thereof could be more apparent.
As shown in Fig.l, in UTRAN Radio Resource Control (RRC) connected mode, a UE could be stayed in four states: CELL_DCH state, CELLJFACH state, CELL_PCH state and URA_PCH state.
The UE in CELL_DCH state occupy dedicated channel to transmit a large amount of data. The UE in CELLJFACH state can use Random Access Channel (RACH) and FACH to transmit a small amount of data. The UE in CELLJPCH state or URAJPCH state can only listen to Broadcast Channel (BCH), and in case that a cell update event or a URA update event is triggered the UE can be automatically moved to CELLJFACH state to send CELL UPDATE message or URA UPDATE message to the UTRAN.
According to the present invention, the UE in CELLJ5CH or URA_PCH state remains in its state in some cases of cell change or URA change.
First embodiment:
In CELLJPCH state the UE sends a cell update indication to the UTRAN in order to signal the change to UTRAN and maintain the mobility state in the UTRAN, the UE stays in CELLJPCH state in some cases.
As shown in Fig.2a, this embodiment includes the following steps:
Step 201 : Create a state keeping cause set for a UE in CELL_PCH state, in this embodiment, the state keeping cause set includes the following reasons: cell change, periodic cell change, periodic traffic volume measurement and re-entering service area.
Step 202: When a UE in CELL_PCH state detects a cell update event, the UE decides whether the cell update event is triggered by a reason included in the preset state keeping cause set, and if yes, proceeds to step 203; otherwise, proceeds to step 204.
Step 203: The UE sends a CELL UPDATE message containing a cell update indication to the UTRAN through RACH, and remains in CELLJPCH state. While in CELL_PCH state, the UE can perform cell reselection.
Step 204: The UE transits to CELLJFACH state to send a CELL UPDATE message to the UTRAN, waiting for returned instructions from the UTRAN.
In above mentioned step 203, the cell update indication is carried in the CELL UPDATE message. Obviously, the cell update indication can be also carried in a new created message.
As shown in Fig.2b, the UE in CELL_PCH state sends a cell update indication to the UTRAN using RACH when the cell update event is triggered by such reasons as cell change, periodic cell change, periodic traffic volume measurement and re-entering service area.
Second embodiment:
In URA_PCH state the UE sends a URA update indication to the UTRAN in order to signal the change to UTRAN and maintain the mobility state in the UTRAN, the UE stays in URA_PCH state in some cases.
As shown in Fig.3 a, this embodiment includes the following steps:
Step 301 : Create a state keeping cause set for a UE in URA-PCH state, in this embodiment, the state keeping cause set includes the following reasons: periodic URA change, periodic (URA) traffic volume measurement and re-entering service area.
Step 302: When a UE in URA_PCH state detects a URA update event, the UE decides whether the URA update event is triggered by a reason included in the preset state keeping cause set, and if yes, proceeds to step 303; otherwise, proceeds to step 304.
Step 303: The UE sends a URA UPDATE message containing a URA update indication to the UTRAN through RACH, and remains in URA_PCH state. While in UARJUPD ATE state, the UE can perform cell reselection.
Step 304: The UE transits to CELLJFACH state to send a URA UPDATE message to the UTRAN, waiting for returned instructions from the UTRAN.
In above mentioned step 303, the URA update indication is carried in the URA UPDATE message. Obviously, the URA update indication can be also carried in a new created message.
As shown in Fig.3b, the UE in URAJPCH state sends a URA update indication to the UTRAN using RACH when the URA update event is triggered by such reasons as periodic URA change, periodic (URA) traffic volume measurement and re-entering service area.
As can be seen from above mentioned step 203 and step 303, the RACH is used to send the cell update indication or URA update indication. The loss of messages on
RACH is rare and should not cause any significant degradation in service quality. In the case that the message on RACH is lost, the UTRAN can page the UE on a cell or a URA.
To sum up, for the UE in CELLJPCH or URA_PCH state, if the UE detects that a cell update event or URA update event is triggered by reasons included in a preset state keeping cause set, it sends to the UTRAN the cell update indication or URA update indication and remains in CELLJPCH or URA_PCH state, without transiting to CELLJFACH state. Since the UE does not move to CELLJFACH state and then return back to CELLJPCH or URA_PCH state again, the autonomy of the UE battery is increased. Therefore, the power saving performance of the UE is increased.
Since the UE does not move to CELL_FACH state and then return back to CELL-PCH or URA_PCH state again, the autonomy of the UE battery is increased. The amount of increase depends very much on the mobility profile of the UE and the parameterization of the network.
According to an embodiment of the present invention, a UE includes a detecting unit, a judging unit and a processing unit, as shown in Figure 4. The detecting unit detects an update event of the UE in a state. The judging unit judges whether the update event is triggered by a reason included in a state keeping cause set, which is configured for the UE and used for determining whether the UE remains in its original state. The processing unit sends an update indication to a UTRAN and remains in the state when determined that the update event is triggered by the reason included in the state keeping cause set.
The UE further includes a storing unit. The storing unit stores the state keeping cause set and provides the state keeping cause set for the judging unit by request.
If the state is CELLJPCH state, the update event is a cell update event, the update indication is a cell update indication, and the state keeping cause set includes at least one of: cell change, periodic cell change, periodic traffic volume measurement and re-entering service area.
If the state is URA_PCH state, the update event is a URA update state, the update indication is a URA update indication, and the state keeping cause set includes at least one of: periodic URA change, periodic traffic volume measurement and re-entering service area.
According to another embodiment of the present invention, as shown in Figure 5, the UE includes a detecting unit, a judging unit, a processing unit and a storing unit.
The detecting unit includes a first detecting module for detecting a cell update event of the UE in CELL_PCH state and a second detecting module for detecting a URA update event of the UE in URA_PCH state.
The storing unit includes a first storing module for storing a first state keeping cause set for the UE in CELLJPCH state and a second storing module for storing a second state keeping cause set for the UE in URA_PCH state.
The judging unit includes a first judging module for judging whether the cell update event is triggered by a reason included in a first state keeping cause set and a second judging module for judging whether the URA update event is triggered by a reason included in a second state keeping cause set.
The processing unit includes a first processing module for sending a cell update indication to the UTRAN and remaining in CELL_PCH state after the first judging unit determines that the cell update event is triggered by the reason included in the first state keeping cause set and a second processing module for sending a URA update indication to the UTRAN and remaining in URA_PCH state after the second judging unit determines that the URA update event is triggered by the reason included in the second state keeping cause set.
The foregoing is only the preferred embodiments of the present invention and is not intended to limit the scope of the present invention. Any modification, equivalent substitution, or improvement made without departing from the spirit and principle of the present invention should be covered by the scope set forth in the appended claims.

Claims

Claims
1. A method for improving power saving performance of a User Equipment (UE)5 comprising: creating a state keeping cause set for a UE; when detecting that an update event is triggered by a reason included in the state keeping cause set, sending, by the UE, an update indication to a Universal Terrestrial Radio Access Network (UTRAN) and remaining in the current state.
2. The method according to Claim 1, wherein said creating the state keeping cause set is: creating the state keeping cause set for the UE in Cell Paging Channel (CELL_PCH) state; and the update event is a cell update event.
3. The method according to Claim 2, wherein the state keeping cause set comprises at least one of: cell change, periodic cell change, periodic traffic volume measurement and re-entering service area.
4. The method according to Claim 2, wherein said update indication is a cell update indication; said sending the update indication to the UTRAN comprises: sending, by the UE, to the UTRAN a CELL UPDATE message containing a cell update indication.
5. The method according to Claim 1, wherein said creating the state keeping cause set is: creating the state keeping cause set for the UE in Universal Terrestrial Radio Access Network Registration Area Paging Channel (URA_PCH) state; and the update event is a URA update event.
6. The method according to Claim 5, wherein the state keeping cause set comprises at least one of: periodic URA change, periodic traffic volume measurement and re-entering service area.
7. The method according to Claim 5, wherein said update indication is a URA update indication; and said sending the URA update indication to the UTRAN comprises: sending, by the UE, to the UTRAN a URA UPDATE message containing the URA update indication.
8. The method according to Claim 2 or Claim 5, wherein said sending the update indication to the UTRAN comprises: sending, by the UE, to the UTRAN a new created message containing the update indication.
9. A User Equipment (UE), comprising: a detecting unit, for detecting an update event of the UE; a judging unit, for judging whether the update event is triggered by a reason included in a state keeping cause set; a processing unit, for sending an update indication to a Universal Terrestrial Radio Access Network (UTRAN) and remaining in the current state when determined that the update event is triggered by the reason included in the state keeping cause set.
10. The UE according to Claim 9, further comprising: a storing unit, for storing the state keeping cause set and providing the state keeping cause set for the judging unit by request.
11. The UE according to Claim 10, wherein the detecting unit comprises: a first detecting module, for detecting a cell update event of the UE in Cell Paging Channel (CELL_PCH) state; a second detecting module, for detecting a URA update event of the UE in Universal Terrestrial Radio Access Network Registration Area Paging Channel (URA_PCH) state.
12. The UE according to Claim 11, wherein the storing unit comprises: a first storing module, for storing a first state keeping cause set for the UE in CELL_PCH state; a second storing module, for storing a second state keeping cause set for the UE in URA_PCH state.
13. The UE according to Claim 12, wherein the judging unit comprises: a first judging module, for judging whether the cell update event is triggered by a reason included in a first state keeping cause set; a second judging module, for judging whether the URA update event is triggered by a reason included in a second state keeping cause set.
14. The UE according to Claim 13, wherein the processing unit comprises: a first processing module, for sending a cell update indication to the UTRAN and remaining in CELL_PCH state after the first judging unit determines that the cell update event is triggered by the reason included in the first state keeping cause set; a second processing module, for sending a URA update indication to the UTRAN and remaining in URA_PCH state after the second judging unit determines that the URA update event is triggered by the reason included in the second state keeping cause set.
15. The UE according to Claim 9, wherein the state is CELL-PCH state; the update event is a cell update event; the update indication is a cell update indication; and the state keeping cause set comprises at least one of: cell change, periodic cell change, periodic traffic volume measurement and re-entering service area.
16. The UE according to Claim 9, wherein the state is URA_PCH state; the update event is a URA update state; the update indication is a URA update indication; and the state keeping cause set comprises at least one of: periodic URA change, periodic traffic volume measurement and re-entering service area.
PCT/CN2006/002214 2006-08-29 2006-08-29 Method for improving power saving performance of user equipment and ue WO2008028325A1 (en)

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CN101784037A (en) * 2009-01-15 2010-07-21 中兴通讯股份有限公司 Method, device and system for reporting user capability or state

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