JP2022108426A - User equipment, base station, and network node - Google Patents

Abstract

To provide user equipment, a base station, and a network node that enable avoidance of UE concentration to a specific paging opportunity while avoiding collision between paging opportunities.SOLUTION: User equipment (UE 200) comprises an information acquisition unit 231 for acquiring an ID for the UE 200; and a control unit 233 for determining a paging opportunity for the UE using the acquired ID. The acquired ID is an ID obtained by changing an original ID of the UE 200. Each of the acquired ID and the original ID is an integral value within a range of 0 to 1023. The acquired ID is an integral value randomly selected within a range obtained by removing a collision value causing collision between a paging opportunity for the UE 200 and another paging opportunity from the range of 0 to 1023.SELECTED DRAWING: Figure 5

Description

The present disclosure relates to user equipment, base stations and network nodes.

In Release 17 of 3GPP (3rd Generation Partnership Project), a function to monitor incoming information (e.g., voice or data) from multiple carrier networks for devices equipped with multiple SIM (Subscriber Identity Module) cards. A work item has been launched to formulate

For example, as described in Non-Patent Document 1, paging opportunities for multiple networks overlap, and paging reception collisions for multiple networks may occur. Therefore, as described in Non-Patent Document 1, countermeasures against such collisions are being studied. Furthermore, as described in Non-Patent Document 2 and Non-Patent Document 3, specific countermeasures against paging opportunity collision are being studied.

In addition, as described in Non-Patent Document 4 and Non-Patent Document 5, in 5G and 4G (4th Generation), using the UE_ID of the user equipment (User Equipment: UE), paging opportunities for the UE is determined. The UE_ID is any number from 0 to 1023.

3GPP TSG-RAN WG2 Meeting #112e, Online, 2nd -13th Nov 2020, R2-2009325, vivo, “E-mail discussion: [Post111-e][917][Multi-SIM] Multi-Sim (vivo)” 3GPP TSG-RAN WG2 Meeting #111e, Online, 17-28 August 2020, R2-2006540, Vodafone, “Guidance for SA2 on Solution #16 for Key Issue 2 (Paging Occasion Collision) in MUSIM TR 23.761” 3GPP TR 23.761 V1.2.0 (2020-11), “3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; Study on system enablers for devices having multiple Universal Subscriber Identity Modules (USIM) (Release 17)” 3GPP TS 38.304 V16.2.0 (2020-09), “3rd Generation Partnership Project; Technical Specification Group Radio Access Network; NR; User Equipment (UE) procedures in Idle mode and RRC Inactive state (Release 16)” 3GPP TS 36.304 V16.2.0 (2020-09), “3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA); User Equipment (UE) procedures in idle mode (Release 16)”

According to the technique disclosed in Non-Patent Document 2, the UE determines the offset to be applied to the UE_ID when detecting a paging opportunity crash. Further, for example, {1, 2, 3, 4} are listed as offset value sets. However, the inventors believe that when paging opportunity collisions are concentrated for a particular UE_ID, many UEs can be concentrated on a particular paging opportunity if a restrictive offset value is applied to that particular UE_ID. I found the problem.

It is an object of the present disclosure to provide user equipment, base stations and network nodes that allow avoiding concentration of UEs on specific paging occasions while avoiding collisions between paging occasions.

A user equipment according to one aspect of the present disclosure comprises an information acquisition unit for acquiring an ID of the user equipment, and a control unit for determining paging opportunities for the user equipment using the ID. The ID is an ID changed from the original ID of the user equipment, the ID and the original ID are each integer values within a range of 0 to 1023, and the ID is a range of 0 to 1023. A randomly selected integer value within a range that excludes collision values that cause collisions between the paging opportunity for the user equipment and other paging opportunities for the user equipment.

A base station according to one aspect of the present disclosure comprises an information acquisition unit for acquiring an ID of a user equipment, and a control unit for determining paging opportunities for the user equipment using the ID. The ID is an ID changed from the original ID of the user equipment, the ID and the original ID are each integer values within a range of 0 to 1023, and the ID is a range of 0 to 1023. A randomly selected integer value within a range that excludes collision values that cause collisions between the paging opportunity for the user equipment and other paging opportunities for the user equipment.

A network node in a core network according to one aspect of the present disclosure receives a first message from a user equipment that includes first change-related information regarding a change from the original identity of the user equipment to the identity of the user equipment. A processing unit and a transmission processing unit for transmitting a second message including second change-related information about the change to the user equipment. The ID is an ID used to determine paging opportunities for the user equipment, the ID and the original ID are each integer values in the range of 0 to 1023, and the ID is , 0 to 1023, a randomly selected integer value within a range excluding collision values that cause collisions between the paging opportunity for the user equipment and other paging opportunities for the user equipment. .

According to the present disclosure, it is possible to avoid concentration of UEs on specific paging occasions while avoiding collisions between paging occasions. It should be noted that the present disclosure may provide other effects instead of or in addition to the above effects.

1 is an explanatory diagram showing an example of a schematic configuration of a system according to an embodiment of the present disclosure; FIG. FIG. 4 is an explanatory diagram for explaining an example of a case in which a user device according to an embodiment of the present disclosure is equipped with two SIM cards; 2 is a block diagram showing an example of a schematic functional configuration of a base station according to an embodiment of the present disclosure; FIG. 2 is a block diagram showing an example of a schematic hardware configuration of a base station according to an embodiment of the present disclosure; FIG. 2 is a block diagram showing an example of a schematic functional configuration of a user device according to an embodiment of the present disclosure; FIG. 2 is a block diagram showing an example of a schematic hardware configuration of a user device according to an embodiment of the present disclosure; FIG. 3 is a block diagram showing an example of a schematic functional configuration of a network node according to an embodiment of the present disclosure; FIG. 1 is a block diagram showing an example of a schematic hardware configuration of a network node according to an embodiment of the present disclosure; FIG. FIG. 4 is an explanatory diagram for explaining an example of a range in which UE_IDs are randomly selected according to an embodiment of the present disclosure; FIG. 5 is a sequence diagram for explaining an example of a schematic flow of first processing according to an embodiment of the present disclosure; FIG. 7 is a sequence diagram for explaining an example of a schematic flow of second processing according to an embodiment of the present disclosure; FIG. 10 is an explanatory diagram for explaining an example of a case where a user device is equipped with three SIM cards in the first modified example of the embodiment of the present disclosure; FIG. 11 is an explanatory diagram for explaining an example of a range in which UE_IDs are randomly selected according to the first modification of the embodiment of the present disclosure; FIG. 11 is a sequence diagram for explaining an example of a schematic flow of first processing according to a second modification of the embodiment of the present disclosure; FIG. 11 is a sequence diagram for explaining an example of a schematic flow of second processing according to a second modification of the embodiment of the present disclosure; FIG. 11 is a sequence diagram for explaining an example of a schematic flow of first processing according to a third modified example of the embodiment of the present disclosure; FIG. 20 is a sequence diagram for explaining an example of a schematic flow of a first process according to a fourth modified example of the embodiment of the present disclosure; FIG.

Embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. In addition, in the present specification and drawings, elements that can be described in the same manner can be omitted from redundant description by assigning the same reference numerals.

The description is given in the following order.
1. System configuration 2 . Configuration of base station 3 . Configuration of User Equipment 4 . Configuration of network nodes5. Operation example 6. Modification

<1. System configuration>
An example configuration of a system 1 according to an embodiment of the present disclosure will be described with reference to FIG. Referring to FIG. 1 , system 1 includes base station 100 , user equipment (UE) 200 and core network 30 . Core network 30 includes network nodes 300 .

For example, the system 1 is a system conforming to the Technical Specification (TS) of 3GPP (Third Generation Partnership Project). More specifically, for example, the system 1 is a system conforming to 5G or NR (New Radio) TS. Naturally, the system 1 is not limited to this example.

(1) Base station 100
The base station 100 is a node of a radio access network (RAN) and communicates with UEs (eg, UE 200) located within the coverage area 10 of the base station 100. FIG.

For example, the base station 100 communicates with the UE (for example, the UE 200) using the RAN protocol stack. For example, the protocol stack, RRC (Radio Resource Control) layer, SDAP (Service Data Adaptation Protocol) layer, PDCP (Packet Data Convergence Protocol) layer, RLC (Radio Link Control) layer, MAC (Medium Access Control) layer and physical (Physical: PHY) layer. Alternatively, the protocol stack may not include all of these layers, but some of these layers.

For example, base station 100 is a gNB. A gNB is a node that provides NR user plane and control plane protocol terminations towards the UE and is connected to the 5G Core Network (5GC) via the NG interface. Alternatively, base station 100 may be an en-gNB.

Base station 100 may include multiple nodes. The plurality of nodes may include a first node that hosts a higher layer included in the protocol stack and a second node that hosts a lower layer included in the protocol stack. good. The upper layers may include an RRC layer, an SDAP layer and a PDCP layer, and the lower layers may include an RLC layer, a MAC layer and a PHY layer. The first node may be a CU (central unit), and the second node may be a DU (Distributed Unit). Note that the plurality of nodes may include a third node that performs lower-level processing of the PHY layer, and the second node may perform higher-level processing of the PHY layer. The third node may be an RU (Radio Unit).

Alternatively, base station 100 may be one of the plurality of nodes, or may be connected to another unit of the plurality of nodes.

Base station 100 may be an IAB (Integrated Access and Backhaul) donor or an IAB node.

(2) UE200
UE 200 communicates with a base station. For example, UE 200 communicates with base station 100 when located within coverage area 10 of base station 100 .

For example, UE 200 communicates with a base station (eg, base station 100) using the above protocol stack.

Among other things, the UE 200 can be equipped with two or more SIM cards. That is, UE 200 is a multi-SIM UE or multi-SIM device. The UE 200 can communicate in two or more mobile networks respectively corresponding to the two or more SIM cards.

For example, the UE 200 is a mobile network corresponding to one of the two or more SIM cards, and includes the base station 100 and the network node 300 (hereinafter referred to as "first mobile network"). ). Further, the UE 200 is capable of communicating in a mobile network (hereinafter referred to as "second mobile network") corresponding to the other of the two or more SIM cards.

Referring to the example of FIG. 2, for example, UE 200 may communicate in a first mobile network including base station 100 and a second mobile network including base station 41 . Therefore, UE 200 receives the paging message transmitted by base station 100 and also receives the paging message transmitted by base station 41 .

(3) Network node 300
Network node 300 is a network function of core network 30 . For example, the network node 300 is an AMF (Access and Mobility Management Function).

<2. Configuration of Base Station>
An example of the configuration of the base station 100 according to the embodiment of the present disclosure will be described with reference to FIGS. 3 and 4. FIG.

(1) Functional Configuration First, an example of the functional configuration of the base station 100 according to the embodiment of the present disclosure will be described with reference to FIG. Referring to FIG. 3, the base station 100 includes a wireless communication unit 110, a network communication unit 120, a storage unit 130 and a processing unit 140. FIG.

The wireless communication unit 110 wirelessly transmits and receives signals. For example, the radio communication unit 110 receives signals from UEs and transmits signals to the UEs.

Network communication unit 120 receives signals from a network and transmits signals to the network.

The storage unit 130 stores various information.

The processing unit 140 provides various functions of the base station 100 . The processing unit 140 includes an information acquisition unit 141 , a control unit 143 , a first communication processing unit 145 and a second communication processing unit 147 . Note that the processing unit 140 may further include components other than these components. That is, the processing unit 140 can perform operations other than those of these components. Specific operations of the information acquisition unit 141, the control unit 143, the first communication processing unit 145, and the second communication processing unit 147 will be described later in detail.

For example, the processing unit 140 (first communication processing unit 145) communicates with the UE (for example, the UE 200) via the wireless communication unit 110. For example, the processing unit 140 (second communication processing unit 147) communicates with other nodes (for example, the network node 300 in the core network 30 or other base stations) via the network communication unit 120. FIG.

(2) Hardware Configuration Next, an example hardware configuration of the base station 100 according to the embodiment of the present disclosure will be described with reference to FIG. Referring to FIG. 4, base station 100 comprises antenna 181 , RF circuitry 183 , network interface 185 , processor 187 , memory 189 and storage 191 .

Antenna 181 converts a signal into radio waves and radiates the radio waves into space. Also, the antenna 181 receives radio waves in space and converts the radio waves into signals. Antenna 181 may include a transmit antenna and a receive antenna, or may be a single antenna for transmission and reception. Antenna 181 may be a directional antenna and may include multiple antenna elements.

The RF circuit 183 performs analog processing of signals transmitted and received via the antenna 181 . RF circuitry 183 may include high frequency filters, amplifiers, modulators, low pass filters, and the like.

Network interface 185, which is, for example, a network adapter, transmits signals to and receives signals from the network.

Processor 187 performs digital processing of signals transmitted and received via antenna 181 and RF circuit 183 . The digital processing includes processing of the protocol stack of the RAN. Processor 187 also processes signals sent and received via network interface 185 . Processor 187 may include multiple processors or may be a single processor. The multiple processors may include a baseband processor that performs the digital processing and one or more processors that perform other processing.

The memory 189 stores programs executed by the processor 187, parameters relating to the programs, and data relating to the programs. The memory 189 may include at least one of ROM (Read Only Memory), EPROM (Erasable Programmable Read Only Memory), EEPROM (Electrically Erasable Programmable Read Only Memory), RAM (Random Access Memory), and flash memory. All or part of memory 189 may be included within processor 187 .

The storage 191 stores various information. The storage 191 may include at least one of SSD (Solid State Drive) and HDD (Hard Disc Drive).

Wireless communication section 110 may be implemented by antenna 181 and RF circuitry 183 . Network communication unit 120 may be implemented by network interface 185 . Storage unit 130 may be implemented by storage 191 . Processing unit 140 may be implemented by processor 187 and memory 189

Part or all of the processing unit 140 may be virtualized. In other words, part or all of the processing unit 140 may be implemented as a virtual machine. In this case, part or all of the processing unit 140 may operate as a virtual machine on a physical machine (that is, hardware) including a processor, memory, etc. and a hypervisor.

Considering the above hardware configuration, the base station 100 may include a memory (ie, memory 189) for storing programs and one or more processors (ie, processor 187) capable of executing the programs. , the one or more processors may execute the program to perform the operation of the processing unit 140 . The program may be a program for causing the processor to execute the operation of the processing unit 140 .

<3. User device configuration>
An example configuration of the UE 200 according to the embodiment of the present disclosure will be described with reference to FIGS. 5 and 6. FIG.

(1) Functional Configuration First, an example of the functional configuration of the UE 200 according to the embodiment of the present disclosure will be described with reference to FIG. Referring to FIG. 5, the UE 200 includes a wireless communication section 210, a storage section 220 and a processing section 230. FIG.

The wireless communication unit 210 wirelessly transmits and receives signals. For example, the wireless communication unit 210 receives signals from base stations and transmits signals to the base stations. For example, the radio communication unit 210 receives signals from other UEs and transmits signals to other UEs.

The storage unit 220 stores various information.

Processing unit 230 provides various functions of UE 200 . The processing unit 230 includes an information acquisition unit 231 , a control unit 233 and a communication processing unit 235 . Note that the processing unit 230 may further include other components other than these components. That is, the processing unit 230 can perform operations other than those of these components. Specific operations of the information acquisition unit 231, control unit 233, and communication processing unit 235 will be described in detail later.

For example, the processing unit 230 (communication processing unit 235) communicates with a base station (for example, the base station 100 or the base station 41) or another UE via the radio communication unit 210.

(2) Hardware Configuration Next, an example of the hardware configuration of the UE 200 according to the embodiment of the present disclosure will be described with reference to FIG. Referring to FIG. 6, UE 200 comprises antenna 281 , RF circuitry 283 , processor 285 , memory 287 and storage 289 .

Antenna 281 converts a signal into radio waves and radiates the radio waves into space. Also, the antenna 281 receives radio waves in space and converts the radio waves into signals. Antenna 281 may include a transmit antenna and a receive antenna, or may be a single antenna for transmission and reception. Antenna 281 may be a directional antenna and may include multiple antenna elements.

The RF circuit 283 performs analog processing of signals transmitted and received via the antenna 281 . RF circuitry 283 may include high frequency filters, amplifiers, modulators, low pass filters, and the like.

Processor 285 performs digital processing of signals transmitted and received via antenna 281 and RF circuit 283 . The digital processing includes processing of the protocol stack of the RAN. Processor 285 may include multiple processors or may be a single processor. The multiple processors may include a baseband processor that performs the digital processing and one or more processors that perform other processing.

Memory 287 stores programs executed by processor 285, parameters for the programs, and data for the programs. Memory 287 may include at least one of ROM, EPROM, EEPROM, RAM, and flash memory. All or part of memory 287 may be included within processor 285 .

Storage 289 stores various information. Storage 289 may include at least one of SSD and HDD.

Wireless communication section 210 may be implemented by antenna 281 and RF circuitry 283 . Storage unit 220 may be implemented by storage 289 . Processing unit 230 may be implemented by processor 285 and memory 287 .

The processing unit 230 may be implemented by a SoC (System on Chip) including a processor 285 and memory 287 . The SoC may include RF circuitry 283 and the wireless communication unit 210 may also be implemented by the SoC.

Considering the above hardware configuration, the UE 200 may include a memory that stores a program (ie, memory 287) and one or more processors that can execute the program (ie, processor 285). One or more processors may execute the programs described above to perform the operations of the processing unit 230 . The program may be a program for causing the processor to execute the operation of the processing unit 230 .

<4. Network node configuration>
An example configuration of the network node 300 according to the embodiment of the present disclosure will be described with reference to FIGS. 7 and 8. FIG.

(1) Functional Configuration First, an example of the functional configuration of the network node 300 according to the embodiment of the present disclosure will be described with reference to FIG. Referring to FIG. 7, network node 300 comprises network communication unit 310 , storage unit 320 and processing unit 330 .

Network communication unit 310 receives signals from a network and transmits signals to the network.

The storage unit 320 stores various information.

Processing unit 330 provides various functions of network node 300 . The processing unit 330 includes a reception processing unit 331 , a transmission processing unit 333 and a control unit 335 . Note that the processing unit 330 may further include components other than these components. That is, the processing unit 330 may perform operations other than those of these components. Specific operations of the reception processing unit 331, the transmission processing unit 333, and the control unit 335 will be described in detail later.
For example, the processing unit 330 (reception processing unit 331 and transmission processing unit 333) communicates with a base station (eg, base station 100) via the network communication unit 310. FIG. For example, the processing unit 330 (the reception processing unit 331 and the transmission processing unit 333) communicates with the UE (eg, UE 200) via the network communication unit 310 and the base station (eg, base station 100).

(2) Hardware Configuration Next, an example hardware configuration of the network node 300 according to the embodiment of the present disclosure will be described with reference to FIG. Referring to FIG. 8, network node 300 comprises network interface 381 , processor 383 , memory 385 and storage 387 .

The network interface 381 is, for example, a network adapter and transmits signals to and receives signals from the network.

Processor 383 processes signals transmitted and received via network interface 381 . Processor 383 may include multiple processors or may be a single processor.

The memory 385 stores programs executed by the processor 383, parameters relating to the programs, and data relating to the programs. Memory 385 may include at least one of ROM, EPROM, EEPROM, RAM, and flash memory. All or part of memory 385 may be included within processor 383 .

Storage 387 stores various information. The storage 387 may include at least one of SSD (Solid State Drive) and HDD (Hard Disc Drive).

Network communication unit 310 may be implemented by network interface 381 . Storage unit 320 may be implemented by storage 387 . Processing unit 330 may be implemented by processor 383 and memory 385

Part or all of the processing unit 330 may be virtualized. In other words, part or all of the processing unit 330 may be implemented as a virtual machine. In this case, part or all of the processing unit 330 may operate as a virtual machine on a physical machine (that is, hardware) including a processor, memory, etc. and a hypervisor.

Considering the above hardware configuration, the network node 300 may include a memory for storing programs (ie, memory 385) and one or more processors (ie, processor 383) capable of executing the programs. , the one or more processors may execute the program to perform the operation of the processing unit 330 . The program may be a program for causing the processor to execute the operation of the processing unit 330 .

<5. Operation example>
An example of the operation of the base station 100, the UE 200 and the network node 300 according to the embodiments of the present disclosure will be described with reference to FIGS. 9-11.

(1) Determination of Paging Opportunity UE 200 (information acquisition unit 231) acquires an ID of UE 200 (hereinafter referred to as “UE_ID”).

- Determination of paging frame UE 200 (control unit 233) determines a paging frame (PF) for UE 200 using the UE_ID.

For example, the PF is determined by the following formula.
(SFN + PF_offset) mod T = (T div N)*(UE_ID mod N)

SFN is the system frame number for the PF. PF_offset is an offset used to determine the PF. T is the DRX (discontinuous reception) cycle of UE 200 . UE_ID is the UE_ID described above (that is, the ID of the UE 200). N is the total number of PFs in T.

- Determination of Paging Occasion UE 200 (control unit 233) determines a paging occasion (PO) for UE 200 using the UE_ID.

For example, PO is determined by the following formula.
i_s = floor(UE_ID/N) mod Ns

i_s indicates the index of the PO. UE_ID is the UE_ID described above (that is, the ID of the UE 200). N is the total number of PFs in T, and T is the UE 200 DRX cycle. Ns is the number of POs to PF.

The PO is associated with the PF. For example, the PO starts within the PF or after the PF.

- Mobile network For example, the UE_ID is the ID of the UE 200 used in the first mobile network, and the PF and PO are the PF and PO for the UE 200 in the first mobile network.

As described above, the first mobile network corresponds to one of two or more SIM cards that can be loaded by UE 200 and includes base station 100 and network node 300 .

- Base station The base station 100 (information acquisition unit 141) also acquires the UE_ID, and the base station 100 (control unit 143) also uses the UE_ID to determine the PF for the UE200 and the PO for the UE200. do.

(2) UE_ID
- Mobile network As described above, the UE_ID is the ID of the UE 200 used in the first mobile network.

- Changed ID from original ID
Above all, the UE_ID is an ID changed from the original ID of the UE 200 (hereinafter referred to as “original UE_ID”). The UE_ID and the original UE_ID are integer values ranging from 0 to 1023, respectively.

For example, the original ID is the 10 least significant bits of the UE 200's 5G-S-TMSI (Temporary Mobile Subscriber Identity). That is, the original UE_ID is obtained by the following formula.
UE_ID = 5G-S-TMSI mod 1024

For example, the PO determined using the original UE_ID collides with the PO for UE 200 in the second mobile network. As an example, referring again to the example of FIG. 2, base station 100 is included in a first mobile network and base station 41 is included in a second mobile network. In this case, the PO for paging from base station 100 , which is determined using the original UE_ID, collides with the PO for paging from base station 41 . With such a collision, the UE 200 can only receive paging messages on one of the two mobile networks. To avoid this situation, the original UE_ID is changed to the UE_ID.

Note that the expression “collide” here may be replaced with the expression “overlap”.

- Selection of UE_ID The UE_ID is an integer value randomly selected from 0 to 1023, excluding collision values that cause collision between the PO for the UE 200 and other POs for the UE 200. be. For example, the other PO is the PO for UE 200 in the second mobile network.

For example, UE 200 communicates in two mobile networks (ie, the first mobile network and the second mobile network). In this case, the collision value is the same integer value as the original UE_ID, and the range is a range of 0 to 1023 excluding the same integer value as the original UE_ID. That is, the UE_ID is randomly selected within a range of 0 to 1023 excluding the original UE_ID. This is because in the case of communication on two mobile networks, there is only one collision value, and this one collision value will be the same integer value as the original UE_ID.

Referring to the example of FIG. 9, for example, the original UE_ID for UE200 in the first network is 405, and the PO determined using the original UE_ID is UE200 in the second network. Conflicts with PO for In this case, the collision value is 405, and the UE_ID is randomly selected within the range 51 from 0 to 1023, excluding 405.

This makes it possible, for example, to avoid concentration of UEs on a particular PO while avoiding collisions between POs. Specifically, for example, even if PO collisions are concentrated for a particular UE_ID, a new UE_ID is randomly selected within a wide range excluding the collision value, so a large number of UEs to a particular PO concentration can be avoided. Referring again to the example of FIG. 9, even if PO collisions are concentrated for the UE_ID of 405, a new UE_ID is randomly selected within a wide range of 0 to 1023 except for 405. concentration of a large number of UEs on one PO can be avoided.

- Subject that selects UE_ID For example, the UE 200 (information acquisition unit 231) acquires the UE_ID by randomly selecting the UE_ID within the range based on the original UE_ID.

For example, the UE 200 (control unit 233) detects a collision between the PO determined using the original UE_ID and another PO for the UE 200. The UE 200 (information acquisition unit 231) randomly selects the UE_ID within the range based on the original UE_ID in response to the detection of the collision.

(3) Signaling For example, the UE 200 (communication processing unit 235) transmits to the network node 300 a first message including first change-related information regarding the change from the original UE_ID to the UE_ID. The network node 300 (reception processing unit 331 ) receives the first message from the UE 200 .

Furthermore, for example, the network node 300 (the transmission processing unit 333) transmits a second message including second change-related information regarding the change to the UE 200. UE 200 (communication processing unit 235 ) receives the second message from network node 300 .

- Messages For example, the first message and the second message are NAS (non-access stratum) messages and are transmitted and received via the base station 100 .

For example, the first message is a Registration Request message and the second message is a Registration Accept message. Alternatively, the second message may be a Registration Reject message.

- Change-related information As described above, for example, the UE 200 (information acquisition unit 231) randomly selects the UE_ID. Further, for example, the network node 300 (control unit 335) determines acceptance or rejection of the UE_ID.

In this case, for example, the first change-related information includes the UE_ID. Further, for example, said second change-related information indicates acceptance or rejection of said UE_ID.

This allows, for example, the UE 200 and the mobile network to obtain the same UE_ID.

(4) Paging - UE200
For example, when the RRC state of UE200 is RRC Idle or RRC Inactive, UE200 (communication processing unit 235) attempts to receive a paging message to the PO for UE200.

More specifically, for example, UE 200 (communication processing unit 235) performs DRX (discontinuous reception), occurs at the PO for UE 200, and monitors PDCCH (physical downlink control channel). When UE 200 (communication processing unit 235) receives DCI (downlink control information) for scheduling a paging message on PDCCH, it receives the paging message on PDSCH (physical downlink shared channel).

The paging message is an RRC message.

- a network node 300;
For example, when the RRC state of UE200 is RRC Idle or RRC Inactive and there is downlink data for UE200, network node 300 (transmission processing unit 333) sends a paging message for paging UE200 to base station 100. Send to

For example, the paging message includes the UE_ID. Alternatively, the network node 300 may pre-transmit the UE_ID to the base station 100 before transmitting the paging message.

The paging message is an NGAP (NG Application Protocol) message.

- Base station 100
For example, the base station 100 (first communication processing unit 145 ) transmits a paging message to the PO for the UE 200 in response to the paging message received from the network node 300 .

More specifically, for example, the base station 100 (control unit 143) uses the UE_ID in response to the paging message received from the network node 300 to set the PF for the UE 200 and the PO for the UE 200. to decide. Base station 100 (first communication processing unit 145 ) then transmits a paging message to the PO for UE 200 .

The above messages sent by the base station 100 are RRC messages.

(5) Flow of Processing—First Processing An example of the first processing according to the embodiment of the present disclosure will be described with reference to FIG. The first processing is processing for acquiring the UE_ID of the UE 200 .

The UE 200 detects a collision between the PO determined using the original UE_ID of the UE 200 and another PO for the UE 200 (S310).

The UE 200 randomly selects the UE_ID of the UE 200 from 0 to 1023, excluding collision values that cause collisions between POs for the UE 200 (S320).

The UE 200 sends to the network node 300 a first message including first change-related information regarding the change from the original UE_ID to the UE_ID (S330). Network node 300 receives the first message from UE 200 . For example, the first change-related information includes the UE_ID.

The UE 200 determines acceptance or rejection of the UE_ID (S340).

The network node 300 sends a second message to the UE 200 including second change-related information regarding the change (S350). UE 200 receives the second message from network node 300 . For example, the second change-related information indicates acceptance or rejection of the UE_ID.

- Second processing An example of the second processing according to the embodiment of the present disclosure will be described with reference to FIG. The second process is a process for paging to UE200.

UE200 determines PF and PO for UE200 using UE_ID of UE200 (S410). UE 200 attempts to receive a paging message on the determined PO.

The network node 300 transmits a paging message for paging the UE 200 to the base station 100 (S420). Base station 100 receives the paging message from network node 300 . For example, the paging message includes the UE_ID.

The base station 100 determines the PF and PO for the UE 200 using the UE_ID (S430).

Base station 100 sends a paging message to the PO for UE 200 (S440). UE 200 receives the paging message on the PO.

<6. Variation>
First to seventh modifications according to the embodiment of the present disclosure will be described with reference to FIGS. 12 to 17. FIG. Note that two or more of these modifications may be combined.

(1) First Modification In the above-described example of the embodiment of the present disclosure, UE 200 communicates in two mobile networks. However, embodiments of the present disclosure are not limited to this example.

As a first modification of the embodiment of the present disclosure, the UE 200 can be equipped with 3 or more SIM cards and may communicate in 3 or more mobile networks. The three or more mobile networks may include the first mobile network. The first mobile network may correspond to one of the three or more SIM cards. Two or more other mobile networks may support the remaining two or more of the three or more SIM cards.

Referring to the example of FIG. 12, for example, UE 200 communicates in a first mobile network including base station 100, a second mobile network including base station 41, and a third mobile network including base station 43. may be able to Therefore, UE 200 may receive paging messages transmitted by base station 100 , paging messages transmitted by base station 41 , and paging messages transmitted by base station 43 .

Of course, the number of mobile networks is not limited to three, and may be four or more.

- Select UE_ID The UE_ID of UE200 is between 0 and 1023, excluding 2 or more collision values that cause a collision between the PO opportunity for UE200 and any of 2 or more other POs for UE200. It may be an integer value randomly selected within the specified range. The two or more collision values may include the same integer value as the original ID. The two or more other POs may be paging opportunities for UE 200 in two or more other mobile networks.

Referring to the example of FIG. 13, the original UE_ID for UE200 in the first network may be 405, and the PO determined using the original UE_ID is A PO for the UE 200 may collide. Additionally, the PO determined using 750 out of 0-1023 may also collide with the PO for the UE 200 in the third network. In this case, the collision values are 405 and 750, and the UE_ID may be randomly selected within the range 53 from 0 to 1023 excluding 405 and 750.

This allows, for example, avoiding collisions among more than two POs while avoiding concentration of UEs on a particular PO.

(2) Second Modification As a second modification of the embodiment of the present disclosure, the UE_ID may be obtained by adding a randomly selected offset value to the original UE_ID. In other words, the UE_ID may be the sum of the UE_ID and the offset value. More precisely, since the UE_ID is an integer value ranging from 0 to 1023, the UE_ID is the remainder of dividing the sum (that is, the offset value added to the original UE_ID) by 1024. may be

In this case, the UE 200 (information acquisition unit 231) may acquire the UE_ID based on the original UE_ID and the offset value.

- Two Mobile Networks Case The UE 200 may communicate in two mobile networks. In this case, the offset value may be randomly selected within the range of 1-1023. As a result, for example, a randomly selected UE_ID within a range of 0 to 1023 excluding the original UE_ID (ie, collision value) can be obtained.

Referring again to the example of FIG. 9 , the original UE_ID for UE 200 in the first network may be 405 . In this case, the collision value is 405 and the collision offset value is 0. Therefore, the offset value may be randomly selected within a range of 0 to 1023 excluding 0 (ie, 1 to 1023).

- Three or more mobile networks case As in the first variant described above, the UE 200 may communicate in three or more mobile networks. In this case, the offset value is randomly selected within a range of 0 to 1023 excluding two or more collision offset values that change the UE_ID to one of the two or more collision values. can be any integer value. The two or more collision offset values may include zero.

Referring again to the example of FIG. 13, the original UE_ID for UE 200 in the first network may be 405, and the PO determined using the original UE_ID is the second network. may collide with the PO for UE 200 in . Additionally, the PO determined using 750 out of 0-1023 may also collide with the PO for the UE 200 in the third network. In this case, the collision values are 405 and 750 and the collision offset values are 0 and 345. Therefore, the offset value may be randomly selected within a range of 0 to 1023 excluding 0 and 345 (ie, 1 to 344, 346 to 1023).

- Subject that selects the offset value The UE 200 (information acquisition unit 231) may randomly select the offset value within the range based on the original UE_ID.

For example, the UE 200 (control unit 233) may detect collisions between the PO determined using the original UE_ID and other POs for the UE 200. The UE 200 (information acquisition unit 231) may randomly select the offset value within the range based on the original UE_ID upon detection of the collision.

Note that the UE 200 (information acquisition unit 231) may randomly select the offset value and acquire the UE_ID based on the original UE_ID and the offset value. Thereby, the UE 200 (information acquisition unit 231) may randomly select the UE_ID.

- Signaling The first change-related information contained in the first message is not the UE_ID,
The offset value may be included.

The network node 300 (control unit 335) may determine acceptance or rejection of the offset value instead of the UE_ID. The second change-related information included in the second message may indicate acceptance or rejection of the offset value instead of the UE_ID.

- Paging As a first example, the paging message sent by the network node 300 to the base station 100 may contain the offset value instead of the UE_ID. Alternatively, the network node 300 may pre-transmit the offset value to the base station 100 before transmitting the paging message. In this case, the base station 100 (information acquisition unit 141) may acquire the UE_ID based on the original UE_ID and the offset value.

As a second example, the network node 300 (control unit 335) may acquire the UE_ID based on the original UE_ID and the offset value. The paging message sent by the network node 300 to the base station 100 may contain the UE_ID.

--Flow of Processing--First Processing An example of the first processing according to the second modification of the embodiment of the present disclosure will be described with reference to FIG. The first processing is processing for obtaining the offset value applied to the UE_ID.

The UE 200 detects a collision between the PO determined using the original UE_ID of the UE 200 and another PO for the UE 200 (S310).

The UE 200 changes the UE_ID to any of the one or more collision values that cause collisions between POs for the UE 200 from 0 to 1023, excluding one or more collision offset values. Select at random (S325). The one or more collision offset values include zero.

The UE 200 sends to the network node 300 a first message including first change-related information regarding the change from the original UE_ID to the UE_ID (S335). Network node 300 receives the first message from UE 200 . For example, the first change-related information includes the offset value.

The UE 200 determines acceptance or rejection of the offset value (S345).

The network node 300 sends a second message to the UE 200 including second change-related information regarding the change (S355). UE 200 receives the second message from network node 300 . For example, the second change-related information indicates acceptance or rejection of the offset value.

--Second Processing An example of the second processing according to the second modification of the embodiment of the present disclosure will be described with reference to FIG. The second process is a process for paging to UE200.

The UE200 acquires the UE_ID of the UE200 based on the original UE_ID of the UE200 and the offset value (S413).

The UE 200 uses the UE_ID to determine the PF and PO for the UE 200 (S415). UE 200 attempts to receive a paging message on the determined PO.

The network node 300 transmits a paging message for paging the UE 200 to the base station 100 (S425). Base station 100 receives the paging message from network node 300 . For example, the paging message includes the offset value.

The base station 100 also acquires the UE_ID based on the original UE_ID and the offset value (S433).

The base station 100 uses the UE_ID to determine the PF and PO for the UE 200 (S435).

Base station 100 sends a paging message to the PO for UE 200 (S440). UE 200 receives the paging message on the PO.

(3) Third Modification In the above-described example of the embodiment of the present disclosure, the UE 200 (information acquisition unit 231) randomly selects the UE_ID within the range based on the original UE_ID, so that the Get the UE_ID. However, embodiments of the present disclosure are not limited to this example.

As a third modification of the embodiment of the present disclosure, the network node 300 (control unit 335) acquires the UE_ID by randomly selecting the UE_ID within the range based on the original UE_ID. good too.

As a result, for example, paging control can be centralized on the network side.

- Signaling The first change-related information included in the first message may not include the UE_ID and indicate a request for the change from the original UE_ID to the UE_ID.

The second change-related information included in the second message may include the UE_ID.

The UE 200 (information acquisition unit 231) may acquire the UE_ID based on the second change-related information. That is, the UE 200 (information acquisition unit 231) may acquire the UE_ID included in the second change-related information.

- Flow of Processing An example of the first processing according to the third modification of the embodiment of the present disclosure will be described with reference to FIG. The first processing is processing for acquiring the UE_ID of the UE 200 .

The UE 200 detects a collision between the PO determined using the original UE_ID of the UE 200 and another PO for the UE 200 (S510).

The UE 200 sends to the network node 300 a first message including first change-related information regarding the change from the original UE_ID to the UE_ID (S520). Network node 300 receives the first message from UE 200 . For example, the first modification-related information indicates the request for modification.

The network node 300 randomly selects the UE_ID of the UE 200 from 0 to 1023, excluding collision values that cause collisions between POs for the UE 200 (S530).

The network node 300 sends a second message to the UE 200 including second change-related information regarding the change (S540). UE 200 receives the second message from network node 300 . For example, the second change-related information includes the UE_ID. The UE 200 acquires the UE_ID included in the second change-related information.

(4) Fourth Modification In the second modification of the embodiment of the present disclosure, the UE 200 (information acquisition unit 231) randomly selects the offset value within the range based on the original UE_ID. However, embodiments of the present disclosure are not limited to this example.

As a fourth modification of the embodiment of the present disclosure, the network node 300 (control unit 335) may randomly select the offset value within the range based on the original UE_ID.

As a result, for example, paging control can be centralized on the network side.

- Signaling The first change-related information included in the first message may not include the offset value and indicate a request for the change from the original UE_ID to the UE_ID. If the UE 200 communicates in more than two mobile networks and there are two or more collision values, the change related information may include collision value information regarding collision values. The collision value information may include one or more collision values excluding the original UE_ID, or may include one or more collision offset values excluding zero.

The second change-related information included in the second message may include the offset value.

The UE 200 (information acquisition unit 231) may acquire the UE_ID based on the second change-related information. That is, the UE 200 (information acquisition unit 231) may acquire the UE_ID based on the original UE_ID and the offset value included in the second change-related information.

-Process Flow An example of a first process according to the fourth modification of the embodiment of the present disclosure will be described with reference to FIG. The first processing is processing for acquiring the UE_ID of the UE 200 .

The UE 200 detects a collision between the PO determined using the original UE_ID of the UE 200 and another PO for the UE 200 (S510).

The UE 200 sends to the network node 300 a first message including first change-related information regarding the change from the original UE_ID to the UE_ID (S520). Network node 300 receives the first message from UE 200 . For example, the first modification-related information indicates the request for modification. The first change-related information may include collision value information relating to collision values.

The network node 300 modifies the UE_ID to any of the one or more collision values between 0 and 1023 that cause collisions between the POs for the UE 200, excluding one or more collision offset values. A value is randomly selected (S535). The one or more collision offset values include zero.

The network node 300 sends a second message to the UE 200 including second change-related information regarding the change (S545). UE 200 receives the second message from network node 300 . For example, the second change-related information includes the offset value.

(5) Fifth Modification In the above-described examples and modifications of the embodiment of the present disclosure, as described above with reference to FIGS. A first message containing relevant information is sent to the network node 300 . The first message is a NAS message. However, embodiments of the present disclosure are not limited to this example.

As a fifth modification of the embodiment of the present disclosure, UE 200 (communication processing unit 235) may transmit an RRC message including the first change-related information to base station 100. The base station 100 (first communication processing unit 145) may receive the RRC message and acquire the first change-related information. The RRC message may not include a NAS message, and the first change-related information may be an information element of the RRC message.

- First Example As a first example, the base station 100 (second communication processing unit 147) may transmit an NGAP message including the first change-related information to the network node 300. FIG. The network node 300 (reception processing unit 331) may receive the NGAP message.

- Second example As a second example, the base station 100 (first communication processing unit 145) may transmit an RRC message including the second change-related information to the UE200.

The first change-related information may include the UE_ID or the offset value. In this case, the base station 100 (control unit 143) may determine acceptance or rejection of the UE_ID or the offset value. Said second change-related information may indicate said acceptance or said rejection.

Alternatively, said first change-related information may indicate a request to change from said original UE_ID to said UE_ID. In this case, the base station 100 (control unit 143) may select the UE_ID or the offset value. The second change-related information may include the UE_ID or the offset value.

This can, for example, resolve PO collisions within the RAN.

(6) Sixth Modification In the above-described example of the embodiment of the present disclosure, the system 1 is a 5G or NR TS-compliant system. However, the system 1 according to the embodiment of the present disclosure is not limited to this example.

As a sixth modification of the embodiment of the present disclosure, the system 1 may be a TS-compliant system of LTE (Long Term Evolution), LTE-A (LTE Advanced), or 4G (4th generation).

The base station 100 may be an eNB (evolved Node B), and the network node 300 may be an MME (Mobility Management Entity).

The original ID may be the least significant 10 bits of the IMSI (International Mobile Subscriber Identity) of UE 200 .

The first message sent from the UE 200 to the network node 300 may be a Tracking Area Update Request message. The second message sent from network node 300 to UE 200 may be a Tracking Area Update Accept message. Alternatively, the second message may be a Tracking Area Update Reject message.

(7) Seventh Modification In the above-described example of the embodiment of the present disclosure, the system 1 is a 5G or NR TS-compliant system. Furthermore, in a sixth variant of the embodiment of the present disclosure, the system 1 is a system compliant with LTE, LTE-A or 4G TS. However, the system 1 according to embodiments of the present disclosure is not limited to these examples.

As a seventh modification of the embodiment of the present disclosure, the system 1 may be a system conforming to other TSs of 3GPP. As an example, the system 1 may be a next-generation (eg, 6G) TS-compliant system.

Alternatively, system 1 may be a TS-compliant system of another standards body for mobile communications.

Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the embodiments. Those skilled in the art will appreciate that the embodiments are illustrative only and that various modifications are possible without departing from the scope and spirit of the disclosure.

For example, the steps in the processes described herein need not necessarily be executed in chronological order according to the order described in the flowcharts or sequence diagrams. For example, steps in a process may be performed in an order different from that depicted in a flowchart or sequence diagram, or in parallel. Also, some of the steps in the process may be deleted and additional steps may be added to the process.

For example, a method may be provided that includes the operation of one or more components of the apparatus described herein, and a program may be provided to cause a computer to perform the operation of the components. Further, a computer-readable non-transitional tangible recording medium recording the program may be provided. Of course, such methods, programs, and non-transitory tangible computer-readable storage media are also included in the present disclosure.

For example, in this disclosure user equipment (UE) refers to a mobile station, mobile terminal, mobile device, mobile unit, subscriber station, subscriber terminal, subscriber equipment, subscriber unit, wireless It may also be called a station, a wireless terminal, a wireless device, a wireless unit, a remote station, a remote terminal, a remote device, a remote unit, or the like.

For example, in this disclosure, "transmit" may mean performing at least one layer of processing within the protocol stack used for transmission, or physically transmitting a signal wirelessly or by wire. may mean sending to Alternatively, "transmitting" may mean a combination of performing the at least one layer of processing and physically transmitting the signal wirelessly or by wire. Similarly, "receive" may mean performing processing of at least one layer in the protocol stack used for reception, or physically receiving a signal wirelessly or by wire. may mean that Alternatively, "receiving" may mean a combination of performing the at least one layer of processing and physically receiving the signal wirelessly or by wire.

For example, in this disclosure, "obtain/acquire" may mean obtaining information among stored information, obtaining information among information received from other nodes. or to obtain the information by generating the information.

For example, in this disclosure, the terms “include” and “comprise” are not meant to include only the recited items, but may include only the recited items, or may include only the recited items. It means that further items may be included in addition to the

For example, in the present disclosure, "or" does not mean exclusive OR, but means logical OR.

Note that the technical features included in the above-described embodiments may be expressed as the following features. Of course, the disclosure is not limited to the following features.

(Feature 1)
A user equipment (200),
an information acquisition unit (231) for acquiring the ID of the user device;
a controller (233) that determines paging opportunities for the user equipment using the ID;
with
the ID is a modified ID from the original ID of the user equipment;
each of the ID and the original ID is an integer value within the range of 0 to 1023;
The ID is random within the range (51, 53) from 0 to 1023, excluding collision values that cause collisions between the paging opportunity for the user equipment and other paging opportunities for the user equipment. is an integer value selected for
User equipment.

(Feature 2)
The user equipment of feature 1, wherein the collision value is the same integer value as the original ID.

(Feature 3)
The ID excluded two or more collision values from 0 to 1023 that cause a collision between the paging opportunity for the user equipment and any of two or more other paging opportunities for the user equipment. is a randomly selected integer value within the range (53);
the two or more collision values include the same integer value as the original ID;
The user equipment of feature 1.

(Feature 4)
A user equipment according to any one of the preceding claims, wherein the ID is the original ID plus a randomly selected offset value.

(Feature 5)
3. The user equipment of feature 2, wherein the ID is the original ID plus an offset value randomly selected in the range of 1-1023.

(Feature 6)
the ID is obtained by adding an offset value to the original ID;
The offset value is an integer value randomly selected within a range of 0 to 1023 excluding two or more collision offset values that change the ID to one of the two or more collision values. ,
wherein the two or more collision offset values include 0;
A user equipment according to feature 3.

(Feature 7)
said identity is an identity of said user equipment used in a mobile network;
the paging opportunity is a paging opportunity for the user equipment in the mobile network;
the other paging opportunity is a paging opportunity for the user equipment in another mobile network;
User equipment according to any one of the features 1-6.

(Feature 8)
The user device can be equipped with two or more SIM (Subscriber Identity Module) cards,
the mobile network corresponds to one of the two or more SIM cards;
the other mobile network corresponds to the other of the two or more SIM cards;
The user equipment of feature 7.

(Feature 9)
said identity is an identity of said user equipment used in a mobile network;
the paging opportunity is a paging opportunity for the user equipment in the mobile network;
the two or more other paging opportunities are paging opportunities for the user equipment in two or more other mobile networks;
User equipment according to feature 3 or 6.

(Feature 10)
The user device can be equipped with three or more SIM (Subscriber Identity Module) cards,
the mobile network corresponds to one of the three or more SIM cards;
the two or more other mobile networks correspond to the remaining two or more of the three or more SIM cards;
The user equipment of feature 9.

(Feature 11)
sending a first message to a network node (300) in a core network (30) containing first change-related information relating to a change from said original identity to said identity, and sending second change-related information relating to said change; 11. The user equipment according to any one of the preceding claims, further comprising a communication processing unit for receiving from said network node a second message comprising:

(Feature 12)
The information acquisition unit acquires the ID by randomly selecting the ID within the range based on the original ID,
The first change-related information includes the ID or an offset value between the original ID and the ID,
the second change-related information indicates acceptance or rejection of the ID or the offset value;
12. The user equipment of feature 11.

(Feature 13)
The first change-related information indicates the change request;
The second change-related information includes the ID or an offset value between the original ID and the ID,
The information acquisition unit acquires the ID based on the second change-related information.
12. The user equipment of feature 11.

(Feature 14)
The first message and the second message are
Registration Request message and Registration Accept message, or
14. A user equipment according to any one of features 11 to 13, which is a Tracking Area Update Request message and a Tracking Area Update Accept message.

(Feature 15)
The user according to any one of the preceding claims, wherein said original identity is the 10 least significant bits of a 5G-S-TMSI (Temporary Mobile Subscriber Identity) or IMSI (International Mobile Subscriber Identity) of said user equipment. machine.

(Feature 16)
the controller determines a paging frame for the user equipment using the ID;
the paging occasion for the user equipment is associated with the paging frame for the user equipment;
User equipment according to any one of the features 1-15.

(Feature 17)
17. The user equipment of any one of the preceding claims, further comprising a communications processor (235) that attempts to receive paging messages on said paging occasions.

(Feature 18)
an information acquisition unit (141) that acquires the ID of the user device (200);
a controller (143) for determining paging opportunities for said user equipment using said ID;
with
the ID is a modified ID from the original ID of the user equipment;
each of the ID and the original ID is an integer value within the range of 0 to 1023;
The ID is random within the range (51, 53) from 0 to 1023, excluding collision values that cause collisions between the paging opportunity for the user equipment and other paging opportunities for the user equipment. is an integer value selected for
Base station (100).

(Feature 19)
19. The base station of feature 18, further comprising a communications processor that transmits a paging message on the paging occasion.

(Feature 20)
A network node (300) in a core network (30), comprising:
a receiving processor (331) for receiving from a user equipment a first message containing first change-related information regarding a change from the original identity of the user equipment (200) to the identity of the user equipment;
a transmission processing unit (333) for transmitting to said user equipment a second message comprising second change-related information relating to said change;
with
the ID is an ID used to determine paging opportunities for the user equipment;
each of the ID and the original ID is an integer value within the range of 0 to 1023;
The ID is random within the range (51, 53) from 0 to 1023, excluding collision values that cause collisions between the paging opportunity for the user equipment and other paging opportunities for the user equipment. is an integer value selected for
Network Node (300).

(Feature 21)
A method performed by a user equipment (200), comprising:
obtaining an identity of the user equipment;
determining paging opportunities for the user equipment using the ID;
including
the ID is a modified ID from the original ID of the user equipment;
each of the ID and the original ID is an integer value within the range of 0 to 1023;
The ID is random within the range (51, 53) from 0 to 1023, excluding collision values that cause collisions between the paging opportunity for the user equipment and other paging opportunities for the user equipment. is an integer value selected for
Method.

(Feature 22)
A method performed by a base station (100), comprising:
obtaining an identity of the user equipment (200);
determining paging opportunities for the user equipment using the ID;
including
the ID is a modified ID from the original ID of the user equipment;
each of the ID and the original ID is an integer value within the range of 0 to 1023;
The ID is random within the range (51, 53) from 0 to 1023, excluding collision values that cause collisions between the paging opportunity for the user equipment and other paging opportunities for the user equipment. is an integer value selected for
Method.

(Feature 23)
A method performed by a network node (300) in a core network (30), comprising:
receiving a first message from a user equipment including first change-related information regarding a change from an original identity of a user equipment (200) to an identity of the user equipment;
sending a second message to the user equipment including second change-related information regarding the change;
including
the ID is an ID used to determine paging opportunities for the user equipment;
each of the ID and the original ID is an integer value within the range of 0 to 1023;
The ID is random within the range (51, 53) from 0 to 1023, excluding collision values that cause collisions between the paging opportunity for the user equipment and other paging opportunities for the user equipment. is an integer value selected for
Method.

(Feature 24)
obtaining an identity of the user equipment (200);
determining paging opportunities for the user equipment using the ID;
is a program that causes a computer to execute
the ID is a modified ID from the original ID of the user equipment;
each of the ID and the original ID is an integer value within the range of 0 to 1023;
The ID is random within the range (51, 53) from 0 to 1023, excluding collision values that cause collisions between the paging opportunity for the user equipment and other paging opportunities for the user equipment. is an integer value selected for
program.

(Feature 25)
receiving a first message from a user equipment including first change-related information regarding a change from an original identity of a user equipment (200) to an identity of the user equipment;
sending a second message to the user equipment including second change-related information regarding the change;
is a program that causes a computer to execute
the ID is an ID used to determine paging opportunities for the user equipment;
each of the ID and the original ID is an integer value within the range of 0 to 1023;
The ID is random within the range (51, 53) from 0 to 1023, excluding collision values that cause collisions between the paging opportunity for the user equipment and other paging opportunities for the user equipment. is an integer value selected for
program.

(Feature 26)
obtaining an identity of the user equipment (200);
determining paging opportunities for the user equipment using the ID;
A computer-readable non-transitional tangible recording medium that records a program that causes a computer to execute
the ID is a modified ID from the original ID of the user equipment;
each of the ID and the original ID is an integer value within the range of 0 to 1023;
The ID is random within the range (51, 53) from 0 to 1023, excluding collision values that cause collisions between the paging opportunity for the user equipment and other paging opportunities for the user equipment. is an integer value selected for
Computer-readable non-transitional tangible recording medium.

(Feature 27)
receiving a first message from a user equipment including first change-related information regarding a change from an original identity of a user equipment (200) to an identity of the user equipment;
sending a second message to the user equipment including second change-related information regarding the change;
A computer-readable non-transitional tangible recording medium that records a program that causes a computer to execute
the ID is an ID used to determine paging opportunities for the user equipment;
each of the ID and the original ID is an integer value within the range of 0 to 1023;
The ID is random within the range (51, 53) from 0 to 1023, excluding collision values that cause collisions between the paging opportunity for the user equipment and other paging opportunities for the user equipment. is an integer value selected for
Computer-readable non-transitional tangible recording medium.

1 system 30 core network 41, 43 base station 51, 53 range 100 base station 141 information acquisition unit 143 control unit 145 first communication processing unit 147 second communication processing unit 200 user device 231 information acquisition unit 233 control unit 235 communication processing unit 300 network node 331 reception processing unit 333 transmission processing unit 335 control unit

Claims (15)

A user equipment (200),
an information acquisition unit (231) for acquiring the ID of the user device;
a controller (233) that determines paging opportunities for the user equipment using the ID;
with
the ID is a modified ID from the original ID of the user equipment;
each of the ID and the original ID is an integer value within the range of 0 to 1023;
The ID is random within the range (51, 53) from 0 to 1023, excluding collision values that cause collisions between the paging opportunity for the user equipment and other paging opportunities for the user equipment. is an integer value selected for
User equipment. 2. The user equipment of claim 1, wherein the collision value is the same integer value as the original ID. The ID excluded two or more collision values from 0 to 1023 that cause a collision between the paging opportunity for the user equipment and any of two or more other paging opportunities for the user equipment. is a randomly selected integer value within the range (53);
the two or more collision values include the same integer value as the original ID;
2. User equipment according to claim 1. A user equipment as claimed in any preceding claim, wherein the ID is the original ID plus a randomly selected offset value. 3. The user equipment of claim 2, wherein the ID is the original ID plus a randomly selected offset value in the range of 1-1023. the ID is obtained by adding an offset value to the original ID;
The offset value is an integer value randomly selected from 0 to 1023 within a range excluding two or more collision offset values that change the ID to one of the two or more collision values. ,
wherein the two or more collision offset values include 0;
4. User equipment according to claim 3. said identity is an identity of said user equipment used in a mobile network;
the paging opportunity is a paging opportunity for the user equipment in the mobile network;
the other paging opportunity is a paging opportunity for the user equipment in another mobile network;
User equipment according to any one of claims 1-6. The user device can be equipped with two or more SIM (Subscriber Identity Module) cards,
the mobile network corresponds to one of the two or more SIM cards;
the other mobile network corresponds to the other of the two or more SIM cards;
8. User equipment according to claim 7. said identity is an identity of said user equipment used in a mobile network;
the paging opportunity is a paging opportunity for the user equipment in the mobile network;
the two or more other paging opportunities are paging opportunities for the user equipment in two or more other mobile networks;
User equipment according to claim 3 or 6. The user device can be equipped with three or more SIM (Subscriber Identity Module) cards,
the mobile network corresponds to one of the three or more SIM cards;
the two or more other mobile networks correspond to the remaining two or more of the three or more SIM cards;
10. User equipment according to claim 9. sending a first message to a network node (300) in a core network (30) including first change-related information relating to a change from said original identity to said identity, and sending second change-related information relating to said change; User equipment according to any one of claims 1 to 10, further comprising a communication processing unit for receiving from said network node a second message comprising: The information acquisition unit acquires the ID by randomly selecting the ID within the range based on the original ID,
The first change-related information includes the ID or an offset value between the original ID and the ID,
the second change-related information indicates acceptance or rejection of the ID or the offset value;
12. User equipment according to claim 11. The first change-related information indicates the change request;
The second change-related information includes the ID or an offset value between the original ID and the ID,
The information acquisition unit acquires the ID based on the second change-related information.
12. User equipment according to claim 11. an information acquisition unit (141) that acquires the ID of the user device (200);
a controller (143) for determining paging opportunities for said user equipment using said ID;
with
the ID is a modified ID from the original ID of the user equipment;
each of the ID and the original ID is an integer value within the range of 0 to 1023;
The ID is random within the range (51, 53) from 0 to 1023, excluding collision values that cause collisions between the paging opportunity for the user equipment and other paging opportunities for the user equipment. is an integer value selected for
Base station (100). A network node (300) in a core network (30), comprising:
a receiving processor (331) for receiving from a user equipment a first message containing first change-related information regarding a change from the original identity of the user equipment (200) to the identity of the user equipment;
a transmission processing unit (333) for transmitting to said user equipment a second message comprising second change-related information relating to said change;
with
the ID is an ID used to determine paging opportunities for the user equipment;
each of the ID and the original ID is an integer value within the range of 0 to 1023;
The ID is random within the range (51, 53) from 0 to 1023, excluding collision values that cause collisions between the paging opportunity for the user equipment and other paging opportunities for the user equipment. is an integer value selected for
Network Node (300).

Images