A positioning-oriented 5G terminal energy-saving method and device

Abstract

The present invention relates to the field of mobile communications and specifically provides a positioning-oriented 5G terminal energy-saving method and apparatus. A target UE negotiates with the network to determine an energy-saving mode, including a UE positioning type; the UE positioning types are UE Positioning 1: high accuracy; UE Positioning 2: lower power; and UE Positioning type 3: lower power and high accuracy. The UE-requested energy-saving mode includes MICO and / or eDRX value information. Compared with existing technologies, this invention meets the requirements of positioning terminal devices and users in terms of positioning accuracy, energy saving, and other aspects.

Description

Technical Field

[0001] The present invention relates to the field of mobile communications, and specifically provides a positioning-oriented 5G terminal energy-saving method and device. Background Art

[0002] In the 3GPP 5G system, due to the diversity of 5G terminal types, different types of terminals have different requirements for service life and battery energy storage. Considering the purpose of terminal energy saving, the 5G system has proposed a series of energy-saving solutions.

[0003] 1. DRX mode

[0004] The DRX system supports a negotiation mechanism between the UE and the AMF for the idle mode DRX cycle. The idle mode DRX cycle is used for idle UEs and RRC incative CM-CONNECTED states.

[0005] If the UE wants to use UE-specific DRX parameters, the UE can consistently provide the DRX parameters that the UE wants to use in each initial registration and mobile registration procedure.

[0006] The AMF determines the received DRX parameters based on the received UE specific DRX parameters. The AMF shall accept the DRX value requested by the UE, but based on the operator policy, the AMF may adjust the DRX value requested by the UE.

[0007] The AMF shall respond to the UE with the accepted DRX parameters.

[0008] The UE shall use the DRX cycle broadcast by the cell unless the UE has received accepted DRX parameters from the AMF, in which case the UE shall use the accepted DRX parameters negotiated with the AMF or use the DRX cycle broadcast by the cell.

[0009] If the UE does not provide DRX parameters to the AMF during the registration procedure, the DRX cycle broadcast by the RAN will be used, unless the UE has previously received DRX parameters from the AMF. In this case, the previously received DRX cycle will be used.

[0010] The UE's DRX settings cannot be changed during the periodic registration process.

[0011] In the CM-CONNECTED RRC inactive state, the UE can use the DRX cycle negotiated with the AMF, the DRX cycle broadcast by the RAN, or the UE-specific DRX cycle configured by the RAN.

[0012] 2. MICO solution

[0013] The UE may also operate in MICO mode. When the UE indicates a MICO preference during initial registration or mobile registration update, the UE determines whether to allow the UE to use MICO mode based on local configuration, terminal communication mode, UE preferences, UE subscription, and network policy, and then indicates this to the UE during the registration process.

[0014] The UE and the network may renegotiate whether to use the MICO mode in subsequent registration update procedures. When the UE is in the CM-CONNECTED state, the AMF may trigger the mobile registration update procedure through the UE configuration update procedure to deactivate the MICO mode.

[0015] The AMF specifies a registration area during the registration process. When the AMF indicates MICO mode to the UE, the registration area assigned by the AMF to the UE is no longer restricted by the paging area size. If the AMF service area is the entire PLMN, based on local policy and subscription, the AMF may configure the entire PLMN as the registration area for the UE. In this case, registration due to moving to the same PLMN is no longer applicable.

[0016] When the AMF indicates MICO mode to a UE, the AMF considers the UE unreachable if the UE is in the idle state. The AMF rejects downlink data transmission requests for UEs in MICO idle state and provides an appropriate rejection reason. The AMF also postpones the transmission of SMS and location services. A UE in MICO mode is reachable for downlink data and signaling only when it is in the connected state.

[0017] A UE in MICO mode does not need to monitor paging in the idle state and can stop accessing the layer until it switches to the connected state. The triggering conditions for a UE in MICO mode to switch from the idle state to the connected state include:

[0018] -Changes in UE configuration require updates to the network with which it is registered;

[0019] - Periodic registration timer expires;

[0020] -There is uplink data or signaling to be transmitted.

[0021] If the registration area does not cover all PLMNs, the UE needs to first determine whether it is within the registration area before sending uplink data and signaling and performing a mobility registration update.

[0022] During the Registration procedure, the UE does not need to indicate a MICO preference when starting emergency services. When MICO mode has been activated in the UE and the PDU Session for emergency services has been successfully established, the UE and the AMF shall locally deactivate MICO mode. The UE and the AMF do not need to start MICO mode until the AMF receives a request to use MICO mode in the next Registration procedure. To ensure an emergency fallback, after releasing the emergency PDU Session, the UE shall wait for a UE implementation-dependent duration before requesting the use of MICO mode.

[0023] 3. eDRX

[0024] eDRX is a 3GPP 5G feature. Compared to DRX, eDRX has a longer paging cycle, enabling terminals to save power, but also resulting in longer downlink data delays. The module can only monitor the paging channel according to the DRX cycle within the PTW (Paging Time Window) to receive downlink services. Outside the PTW, the module is in sleep mode, does not monitor the paging channel, and cannot receive downlink services.

[0025] eDRX involves the module continuously turning its receiver on and off. When the receiver is on, it can receive data, but when it is off, it cannot. An eDRX cycle consists of two complete periods: one when the receiver is off and the other on. While maintaining low power consumption, eDRX enables fast network response. For example, the module can be configured to sleep for a number of minutes, then wake up and then sleep for another number of minutes. Therefore, eDRX is suitable for applications that don't require frequent data transmission but require fast response times.

[0026] For applications such as logistics monitoring that require data services only every few tens of minutes, eDRX is recommended.

[0027] Furthermore, for applications requiring modifiable monitoring intervals, such as pet trackers, different eDRX parameters can be configured to meet the needs of different scenarios. Under normal circumstances, the server can collect pet location information every 2621 seconds or 5242 seconds. If a pet is lost, the eDRX parameters can be modified via the server. Upon receiving the control information, the module reconfigures the eDRX cycle to 20.48 seconds or 40.96 seconds, allowing the server to collect pet location information every 20.48 seconds or 40.96 seconds. This achieves the best balance between customer needs and device power conservation requirements.

[0028] 4. 5G Rel-18 Positioning Energy Saving

[0029] 3GPP 5G-Advanced Release 18's FS_eLCS_Ph3 lists several key issues for research, including the following ones related to positioning performance optimization:

[0030] Key Issue#12:support of low power and / or high accuracy positioning.

[0031] The key issues mentioned above can be summarized into two questions:

[0032] In view of the energy consumption and positioning accuracy requirements of different positioning terminals, the positioning accuracy should be ensured as much as possible under the condition of limited power consumption.

[0033] To meet the requirements of KI#12, the concept of UE positioning types has been proposed, which classifies UEs with positioning capabilities into the following categories:

[0034] (1)UE positioning type 1: high accuracy (default positioning UE);

[0035] (2)UE positioning type 2: lower power;

[0036] (3)UE positioning type 3: low power and high accuracy (UE positioning with low power and high accuracy).

[0037] To determine the target UE's location, positioning measurements and signaling interactions are performed on the target UE. This data is then collected to improve positioning accuracy. The positioning process is energy-intensive. Meeting the energy-saving requirements of terminals and the need for positioning accuracy is a pressing issue for those skilled in the art. Summary of the Invention

[0038] In view of the above-mentioned deficiencies in the prior art, the present invention provides a highly practical positioning-oriented 5G terminal energy-saving method.

[0039] A further technical task of the present invention is to provide a positioning-oriented 5G terminal energy-saving device with a reasonable design, safety and applicability.

[0040] The technical solution adopted by the present invention to solve its technical problem is:

[0041] A positioning-oriented 5G terminal energy saving method, in which the target UE negotiates with the network to determine the energy saving mode and includes the UE positioning type;

[0042] The UE positioning type is UE Positioning 1: high accuracy; UE Positioning 2: lower power; UE Positioning type 3: lower power and high accuracy;

[0043] The energy saving mode requested by the UE is MICO and / or eDRX value information.

[0044] Furthermore, the target UE negotiates with the network to determine the energy saving mode and includes the UE positioning type, including:

[0045] S101. A UE with positioning capability includes information indicating that the UE positioning type is high accuracy and does not include MICO mode and / or eDRX value information when registering with the network. The AMF receives the UE positioning type information, does not accept the MICO mode and / or eDRX value information, or ignores the MICO mode and / or eDRX value information and returns a registration confirmation message.

[0046] S102: When the AMF receives or triggers a positioning request message;

[0047] S103. If the UE is in CM-IDLE mode, the AMF initiates a network-triggered service request process to trigger the UE to enter the connected state.

[0048] Furthermore, UE Positioning 2: lower power includes:

[0049] A UE with positioning capability includes information that the UE positioning type is lower power and includes the MICO mode and / or requested eDRX value when registering with the network. The AMF receives the information of the UE positioning type, accepts the MICO mode, or returns an appropriate eDRX value based on the eDRX value requested by the UE and sets a PIW value.

[0050] Furthermore, the positioning process in lower power and high accuracy with the target UE in CM-IDLE state is as follows:

[0051] A UE with positioning capability includes positioning UE type information when registering with the network. The positioning UE type of the target UE is indicated as lower power and high accuracy positioning, and negotiates with the AMF to determine an eDRX value and a PTW value to achieve power saving.

[0052] Furthermore, when the AMF receives or triggers a Location Request message, if the target UE is in CM-IDLE mode, the AMF compares the time of triggering the paging with the delay indicator in the Location Request QoS;

[0053] (1) If the delay indicator in the positioning QoS is greater than the value of the timer that triggers paging based on eDRX, the positioning request can be accepted;

[0054] (2) Otherwise, the AMF returns a positioning response message using the historical information or rejects the positioning message.

[0055] Furthermore, the AMF accepts the positioning request and executes the following process:

[0056] (1) The AMF determines that the value of the timer for triggering paging based on eDRX has expired or the UE has actively established a NAS connection and entered CM-Connected mode, triggering the positioning process;

[0057] (2) The AMF and LMF initiate paging to the target UE within the PTW time window and complete the positioning measurement process;

[0058] (3)AMF can continue the positioning process;

[0059] (4)LMF performs positioning measurements on the target UE;

[0060] Among them, AMF and LMF return the location response message of MO, MT or NI, which includes the location information of the target UE.

[0061] Furthermore, the positioning process when the target UE is in the CM-Connected with RRC-Inactive state is as follows:

[0062] (1) The AMF sends the negotiated eDRX value and / or PTW value to the NG-RAN via RRC Inactive Assistance Information;

[0063] (2) When the AMF receives or triggers a positioning request message, in which the requested positioning QoS includes a positioning delay value, which is used to indicate the maximum positioning delay that the LCS Client can accept, the AMF determines to receive the positioning request based on the positioning request and the current status and energy saving information of the target UE;

[0064] (3) The AMF sends the downlink data to the NG-RAN and indicates the downlink positioning data message, including the acceptable time for positioning delay in the positioning request QoS;

[0065] (4) The NG-RAN node makes a judgment based on the timer set by eDRX and the acceptable positioning delay time in the positioning request QoS. If the delay indicator in the positioning QoS is greater than the value of the timer for triggering paging set based on eDRX, the NG-RAN sends a paging message to the UE to activate the UE after the value of the paging timer expires.

[0066] Otherwise, the NG-RAN indicates to the AMF that the UE is unreachable within the delay indicator range of the positioning QoS;

[0067] (5) If the timer triggering the paging on the NG-RAN side expires and the NG-RAN successfully activates the UE into the RRC-Connected state, the network continues to complete the positioning process;

[0068] If the AMF receives an indication that the UE is unreachable within the delay range of the positioning QoS, the AMF directly rejects the positioning request or returns a historical positioning information based on the positioning QoS requirements;

[0069] The AMF returns a positioning response message indicating success or failure.

[0070] Furthermore, the LCS Client indicates in the QoS of the positioning request that the acceptable positioning delay time can be:

[0071] (1) Immediate response;

[0072] (2) A response must be made within a set time period;

[0073] (3) Respond when the target UE is reachable.

[0074] A positioning-oriented 5G terminal energy-saving device, comprising: at least one memory and at least one processor;

[0075] The at least one memory is configured to store a machine-readable program;

[0076] The at least one processor is used to call the machine-readable program to execute a positioning-oriented 5G terminal energy saving method.

[0077] Compared with the prior art, the positioning-oriented 5G terminal energy-saving method and device of the present invention have the following outstanding beneficial effects:

[0078] This invention develops corresponding positioning strategies for different positioning node types, based on the energy-saving strategy set by the current target UE, and for different positioning requests (including positioning latency indicators). The proposed method fully considers the terminal's energy-saving requirements, positioning accuracy requirements, and positioning user's positioning service quality requirements, and develops a corresponding positioning process to meet the positioning accuracy, energy-saving, and other needs of positioning terminal devices and positioning users. BRIEF DESCRIPTION OF THE DRAWINGS

[0079] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0080] Attachment Figure 1 It is a flowchart of a positioning-oriented 5G terminal energy saving method;

[0081] Attachment Figure 2 It is a lower power positioning process in the 5G terminal energy saving method for positioning;

[0082] Attachment Figure 3 This is a schematic diagram of a positioning process for a 5G terminal energy saving method with lower power and high accuracy and a target UE in a CM-IDLE state;

[0083] Attachment Figure 4 This is a schematic diagram of the positioning process for a 5G terminal energy-saving method with lower power and high accuracy and a target UE in the CM-Connected with RRC-Inactive state. DETAILED DESCRIPTION

[0084] In order to enable those skilled in the art to better understand the solutions of the present invention, the present invention will be further described in detail below in conjunction with specific embodiments. Obviously, the embodiments described are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0085] A best embodiment is given below:

[0086] like Figure 1-4As shown, in this embodiment, a positioning-oriented 5G terminal energy saving method is provided, in which the target UE negotiates with the network to determine the energy saving mode and includes the UE positioning type;

[0087] Among them, the UE positioning type is UE Positioning 1: high accuracy; UE Positioning 2: lower power; UE Positioning type 3: Lower power and high accuracy;

[0088] The energy saving mode requested by the UE is MICO and / or eDRX value information.

[0089] The target UE negotiates with the network to determine the energy saving mode and includes the UE positioning type, including:

[0090] S101. A UE with positioning capability includes information indicating that the UE positioning type is high accuracy and does not include MICO mode and / or eDRX value information when registering with the network. The AMF receives the UE positioning type information, does not accept the MICO mode and / or eDRX value information, or ignores the MICO mode and / or eDRX value information and returns a registration confirmation message.

[0091] S102: When the AMF receives or triggers a positioning request message;

[0092] S103. If the UE is in CM-IDLE mode, the AMF initiates a network-triggered service request process to trigger the UE to enter the connected state.

[0093] In UE Positioning 2: lower power, the following are included:

[0094] A UE with positioning capability includes information that the UE positioning type is lower power and includes the MICO mode and / or requested eDRX value when registering with the network. The AMF receives the information of the UE positioning type, accepts the MICO mode, or returns an appropriate eDRX value based on the eDRX value requested by the UE and sets a PIW value.

[0095] The positioning process in low power and high accuracy mode with the target UE in CM-IDLE state is as follows:

[0096] A UE with positioning capability includes positioning UE type information when registering with the network. The positioning UE type of the target UE is indicated as lower power and high accuracy positioning, and negotiates with the AMF to determine an eDRX value and a PTW value to achieve power saving.

[0097] When the AMF receives or triggers a Location Request message, if the target UE is in CM-IDLE mode, the AMF compares the time of triggering the paging with the delay indicator in the Location Request QoS;

[0098] (1) If the delay indicator in the positioning QoS is greater than the value of the timer that triggers paging based on eDRX, the positioning request can be accepted;

[0099] (2) Otherwise, the AMF returns a positioning response message using the historical information or rejects the positioning message.

[0100] The AMF accepts the positioning request and executes the following process:

[0101] (1) The AMF determines that the value of the timer for triggering paging based on eDRX has expired or the UE has actively established a NAS connection and entered CM-Connected mode, triggering the positioning process;

[0102] (2) The AMF and LMF initiate paging to the target UE within the PTW time window and complete the positioning measurement process;

[0103] (3)AMF can continue the positioning process;

[0104] (4)LMF performs positioning measurements on the target UE;

[0105] Among them, AMF and LMF return the location response message of MO, MT or NI, which includes the location information of the target UE.

[0106] The positioning process when the target UE is in the CM-Connected with RRC-Inactive state is as follows:

[0107] (1) The AMF sends the negotiated eDRX value and / or PTW value to the NG-RAN via RRC Inactive Assistance Information;

[0108] (2) When the AMF receives or triggers a positioning request message, in which the requested positioning QoS includes a positioning delay value, which is used to indicate the maximum positioning delay that the LCS Client can accept, the AMF determines to receive the positioning request based on the positioning request and the current status and energy saving information of the target UE;

[0109] (3) The AMF sends the downlink data to the NG-RAN and indicates the downlink positioning data message, including the acceptable time for positioning delay in the positioning request QoS;

[0110] (4) The NG-RAN node makes a judgment based on the timer set by eDRX and the acceptable positioning delay time in the positioning request QoS. If the delay indicator in the positioning QoS is greater than the value of the timer for triggering paging set based on eDRX, the NG-RAN sends a paging message to the UE to activate the UE after the value of the paging timer expires.

[0111] Otherwise, the NG-RAN indicates to the AMF that the UE is unreachable within the delay indicator range of the positioning QoS;

[0112] (5) If the timer triggering the paging on the NG-RAN side expires and the NG-RAN successfully activates the UE into the RRC-Connected state, the network continues to complete the positioning process;

[0113] If the AMF receives an indication that the UE is unreachable within the delay range of the positioning QoS, the AMF directly rejects the positioning request or returns a historical positioning information based on the positioning QoS requirements;

[0114] The AMF returns a positioning response message indicating success or failure.

[0115] The LCS Client indicates in the QoS of the positioning request that the acceptable positioning delay time can be:

[0116] (1) Immediate response;

[0117] (2) A response must be made within a set time period;

[0118] (3) Respond when the target UE is reachable.

[0119] Based on the above method, a positioning-oriented 5G terminal energy-saving device in this embodiment includes: at least one memory and at least one processor;

[0120] The at least one memory is configured to store a machine-readable program;

[0121] The at least one processor is used to call the machine-readable program to execute a positioning-oriented 5G terminal energy saving method.

[0122] The above-mentioned specific implementation methods are only specific cases of the present invention. The patent protection scope of the present invention includes but is not limited to the above-mentioned specific implementation methods. Any appropriate changes or replacements made by ordinary technicians in any of the above-mentioned technical fields that comply with the claims of the present invention for a positioning-oriented 5G terminal energy-saving method and device shall fall within the patent protection scope of the present invention.

[0123] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A positioning-oriented 5G terminal energy saving method, characterized in that: The target UE negotiates with the network to determine the energy saving mode and includes the UE positioning type; The UE positioning type is UE Positioning 1: high accuracy; UE Positioning 2: lower power; UE Positioning type 3: lower power and high accuracy; The energy saving mode requested by the UE is MICO and / or eDRX value information, and the target UE negotiates with the network to determine the energy saving mode and includes the UE positioning type; (1) A UE with positioning capability includes information that the UE positioning type is high accuracy when registering with the network and does not include a request message for the MICO mode and / or eDRX value information. The AMF receives the UE positioning type information, does not accept the MICO mode and / or eDRX value information, or ignores the MICO mode and / or eDRX value information and returns a registration confirmation message; When the AMF receives or triggers a Location Request message, if the UE is in CM-IDLE mode, the AMF initiates a network-triggered service request procedure to trigger the UE to enter the Connected state; (2) When a UE with positioning capability registers with the network, it reports the UE positioning type as lower power and carries the MICO mode and / or requests an eDRX value. The AMF receives the UE positioning type information, accepts the MICO mode, or returns an appropriate eDRX value based on the eDRX value requested by the UE and sets a PTW value. (3) UEs with positioning capabilities must include positioning UE type information when registering with the network, and the positioning type of the target UE must be indicated as lower power and high accuracy positioning. They must also negotiate with the AMF to determine an eDRX value and a PTW value to achieve power saving. When the AMF in (2) and (3) receives or triggers the location request message, if the target UE is in CM-IDLE mode, the AMF compares the time of triggering the paging with the delay indicator in the location request QoS; If the delay indicator in the positioning QoS is greater than the value of the timer that triggers paging based on eDRX, the positioning request can be accepted; Otherwise, the AMF returns a positioning response message using the historical information or rejects the positioning message.

2. A positioning-oriented 5G terminal energy saving method according to claim 1, characterized in that: The AMF accepts the location request and executes the following process: (1) The AMF determines that the value of the timer for triggering paging based on eDRX has expired or the UE has actively established a NAS connection and entered CM-Connected mode, triggering the positioning process; (2) AMF and LMF initiate paging to the target UE within the PTW time window and complete the positioning measurement process; (3) AMF can continue the positioning process; (4) LMF performs positioning measurements on the target UE; Among them, AMF and LMF return the location response message of MO, MT or NI, which includes the location information of the target UE.

3. A positioning-oriented 5G terminal energy saving method according to claim 2, characterized in that: The positioning process when the target UE is in the CM-Connected with RRC-Inactive state is as follows: (1) The AMF sends the negotiated eDRX value and / or PTW value to the NG-RAN via RRC Inactive Assistance Information; (2) When the AMF receives or triggers a positioning request message, the requested positioning QoS includes a positioning delay value, which is used to indicate the maximum positioning delay that the LCS Client can accept. The AMF determines whether to receive the positioning request based on the positioning request and the current status and energy saving information of the target UE; (3) The AMF sends the downlink data to the NG-RAN and indicates the downlink positioning data message, including the acceptable time for positioning delay in the positioning request QoS; (4) The NG-RAN node makes a judgment based on the timer set by eDRX and the acceptable time of positioning delay in the positioning request QoS. If the delay indicator in the positioning QoS is greater than the value of the timer for triggering paging set based on eDRX, the NG-RAN sends a paging message to the UE to activate the UE after the value of the timer waiting for paging expires; Otherwise, the NG-RAN indicates to the AMF that the UE is unreachable within the delay indicator range of the positioning QoS; (5) If the timer triggering the paging on the NG-RAN side expires and the NG-RAN successfully activates the UE to enter the RRC-Connected state, the network continues to complete the positioning process; If the AMF receives an indication that the UE is unreachable within the delay range of the positioning QoS, the AMF directly rejects the positioning request or returns a historical positioning information based on the positioning QoS requirements; The AMF returns a positioning response message indicating success or failure.

4. A positioning-oriented 5G terminal energy saving method according to claim 3, characterized in that: The LCS Client indicates in the QoS of the positioning request that the acceptable time for positioning delay is immediate response, response must be made within a set time period, or response must be made when the target UE is reachable.

5. A positioning-oriented 5G terminal energy-saving device, characterized in that: include: at least one memory and at least one processor; The at least one memory is configured to store a machine-readable program; The at least one processor is configured to call the machine-readable program to execute the method according to any one of claims 1 to 4.

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