Method and communication device for processing a reconstruction procedure

Abstract

A method for a communication device to process a reestablishment procedure includes initiating the reestablishment procedure, selecting a target cell according to a cell selection procedure, and determining whether the target cell is a cell that the communication device is capable of camping on according to a stored system information block 1 in response to the target cell not providing a system information block 1 after selecting the target cell according to the cell selection procedure.

Description

Technical Field

[0001] This invention relates to a method and communication apparatus for a wireless communication system, and more particularly to a method and communication apparatus for processing a reconstruction procedure. Background Technology

[0002] The 3rd Generation Partnership Project (3GPP) developed the Long Term Evolution (LTE) system to improve the Universal Mobile Telecommunications System (UMTS) and support the 3GPP Rel-8 and / or 3GPP Rel-9 standards to meet the increasing needs of users.

[0003] The LTE-Advanced (LTE-A) system evolved from the LTE-A system. The goal of the LTE-A system is to provide rapid power state transitions, improve edge performance of the evolved Node-B (eNB), and increase peak data rates and throughput. It includes advanced technologies such as carrier aggregation and uplink (UL) multiple-input multiple-output (UL MIMO).

[0004] Next-generation radio access network (NG-RAN) was developed to enhance Advanced Long Term Evolution (LTE) systems, supporting 3GPP Rel-15 to 3GPP Rel-19 standards. NG-RAN comprises one or more next-generation nodes (gNBs) and features such as wider operating frequency bands, different parameter sets (numerologies) across different frequency ranges, massive MIMO (multi-input multi-output) systems, and advanced channel coding.

[0005] The communication device requires System Information Block 1 (SIB1) from the cell to check if the cell is suitable for the communication device to perform the reconstruction procedure. If SIB1 is unavailable, based on the wake-up signal (WUS) configuration, the communication device executes the on-demand System Information Block 1 (OD-SIB1) procedure to request SIB1 from the cell. However, the communication device may fail to successfully re-establish the connection to the cell due to invalid wake-up signal configurations and / or delays caused by executing the on-demand System Information Block 1 procedure. Therefore, how to handle the reconstruction procedure is a problem that urgently needs to be solved. Summary of the Invention

[0006] An embodiment of the present invention provides a method for a communication device to process a reconstruction procedure, comprising: initiating the reconstruction procedure; selecting a target cell according to a cell selection procedure; and after selecting the target cell according to the cell selection procedure, determining whether the target cell is a cell that the communication device can camp on according to a stored system information block 1 (SIB1), in response that the target cell does not provide a system information block 1.

[0007] An embodiment of the present invention provides a method for a service cell to process a reconstruction procedure, comprising: transmitting a wake-up signal (WUS) configuration set to a communication device; wherein the wake-up signal configuration set includes multiple identities (IDs) for multiple cells, multiple frequencies corresponding to the multiple cells, and multiple wake-up signal configurations corresponding to the multiple cells; wherein the multiple cells include the service cell and at least one neighboring cell of the service cell.

[0008] An embodiment of the present invention provides a method for processing a reconstruction procedure for a network energy saving (NES) cell, comprising: receiving a reconstruction request information from a communication device, in response to the communication device selecting the network energy saving cell according to a cell selection procedure and determining, according to a stored system information block 1 (SIB1), that the network energy saving cell is a cell that the communication device can be able to camp on. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of a wireless communication system according to Embodiment 1 of the present invention.

[0010] Figure 2 This is a schematic diagram of a communication device according to Embodiment 1 of the present invention.

[0011] Figure 3 This is a flowchart of a first embodiment of the present invention.

[0012] Figure 4 This is a flowchart of a first embodiment of the present invention.

[0013] Figure 5 This is a flowchart of a first embodiment of the present invention.

[0014] Figure 6 This is a timing diagram of the process in Embodiment 1 of the present invention.

[0015] Figure 7 This is a timing diagram of the process in Embodiment 1 of the present invention.

[0016] Figure 8 This is a schematic diagram of a specific time period used in an embodiment of the present invention to verify whether a stored system information block 1 is valid.

[0017] Figure 9 This is a schematic diagram of a specific time period used in an embodiment of the present invention to verify whether a stored system information block 1 is valid.

[0018] List of reference numerals

[0019] 10: Wireless communication system

[0020] 12: Network end

[0021] 14, 20, CM: Communication device

[0022] 200: At least one processing circuit

[0023] 210: At least one storage device

[0024] 214: Program Code

[0025] 220: At least one communication interface device

[0026] 30, 40, 50, 60, 70: Process

[0027] 300, 302, 304, 306, 308, 400, 402, 404, 500, 502, 504, 600, 602, 604, 606, 608, 700, 702, 704, 706, 708, 710, 712, 714, 716, 718: Steps

[0028] SC: Service Cell

[0029] TC: Target cells

[0030] SP: Specific Time Period

[0031] T: Time axis

[0032] MP1~MP2: Modify time period

[0033] MPB1~MPB3: Boundary Detailed Implementation

[0034] Figure 1 This is a schematic diagram of a wireless communication system 10 according to an embodiment of the present invention, which is simplified to consist of a network terminal 12 and multiple communication devices 14. The wireless communication system 10 supports time-division duplexing (TDD) mode, frequency-division duplexing (FDD) mode, a combined TDD and FDD mode, a non-terrestrial network (NTN) mode, or licensed-assisted access (LAA) mode. That is, the network terminal 12 and the communication devices 14 can communicate with each other through FDD carriers, time-division duplex carriers, licensed carriers (licensed serving cells), and / or unlicensed carriers (or unlicensed serving cells). Furthermore, the wireless communication system 10 supports carrier aggregation (CA). That is, the network terminal 12 and the communication devices 14 can communicate with each other through multiple serving cells (e.g., multiple serving carriers) that include a primary cell (e.g., a primary component carrier) and one or more secondary cells (e.g., secondary component carriers).

[0035] exist Figure 1In this document, network terminal 12 and communication device 14 are used to illustrate the architecture of wireless communication system 10. In a Universal Mobile Telecommunications System (UMTS), network terminal 12 may be a Universal Terrestrial Radio Access Network (UTRAN), which includes at least one base station (Node-B, NB). In one embodiment, in systems such as Long Term Evolution (LTE), LTE-advanced (LTE-A), and evolved versions of LTE, network terminal 12 may be an evolved universal terrestrial radio access network (E-UTRAN), which includes at least one evolved base station (eNB) and / or at least one relay node. In one embodiment, network terminal 12 may be a next-generation radio access network (NG-RAN), which includes at least one next-generation node-B (gNB) and / or at least one fifth-generation (5G) base station (BS). In one embodiment, the next-generation or fifth-generation base station of network terminal 12 may include an non-terrestrial gateway (NTN Gateway) and a non-terrestrial payload (NTN payload). In one embodiment, the next-generation or fifth-generation base station of network terminal 12 may be a transmission reception point (TRP). In one embodiment, network terminal 12 may be any base station conforming to a specific communication standard for communicating with communication device 14.

[0036] New Radio (NR) is a standard defined for fifth-generation systems (or fifth-generation networks) to provide a unified air interface with improved performance. It deploys next-generation base stations to enable fifth-generation systems, supporting advanced features such as enhanced Mobile Broadband (eMBB), Ultra Reliable Low Latency Communications (URLLC), and massive Machine Type Communications (mMTC). EMBB provides broadband services with greater bandwidth and low / medium latency. URLLC offers higher reliability and low latency for applications such as end-to-end communications. Examples of such applications include industrial internet, smart grids, infrastructure protection, remote surgery, and intelligent transportation systems (ITS). MMTC enables the Internet of Things (IoT) for fifth-generation systems, which includes billions of connected devices and / or sensors.

[0037] In addition, the network terminal 12 may include at least one of Universal Terrestrial Global Radio Access Network / Evolved Universal Terrestrial Global Radio Access Network / Next Generation Radio Access Network and core network, wherein the core network includes network entities such as Mobility Management Entity (MME), Serving Gateway (S-GW), Packet Data Network (PDN) Gateway (P-GW), Self-Organizing Networks (SON) server, Radio Network Controller (RNC), Access and Mobility Management Function (AMF), Session Management Function (SMF), User Plane Function (UPF) and / or Authentication Server Function (AUSF). In one embodiment, after receiving information transmitted by communication device 14 at network terminal 12, the information may be processed only by Universal Terrestrial Global Access Network (UTN), Evolved Universal Terrestrial Global Access Network (EPGGN), or Next Generation Radio Access Network (NGR), and a decision corresponding to the information may be made by UTN / EPGGN / NGR. In one embodiment, UTN / EPGGN / NGR may forward the information to the core network, where it processes the information and then makes a decision corresponding to the information. In one embodiment, the information may be processed by UTN / EPGGN / NGR and the core network, and a decision may be made after coordination and / or cooperation are performed by UTN / EPGGN / NGR and the core network.

[0038] Communication device 14 can be user equipment (UE), a Very Small Aperture Terminal (VSAT), a low-cost device (e.g., a machine-type communication (MTC) device), a device-to-device (D2D) communication device, a narrow-band Internet of Things (NB-IoT) device, a mobile phone, a laptop, a tablet, an e-reader, a portable computer system, or a combination of the above. Furthermore, depending on the transmission direction, network terminal 12 and communication device 14 can be considered as either transmitters or receivers. For example, for an uplink (UL), communication device 14 is the transmitter and network terminal 12 is the receiver; for a downlink (DL), network terminal 12 is the transmitter and communication device 14 is the receiver.

[0039] Communication device 14 can perform layer 1 (L1) measurements to generate layer 1 measurement results, and can modify the service cell based on the layer 1 measurement results. This procedure can be called conditional L1 / L2 triggered mobility (C-LTM). Conditional L1 / L2 triggered mobility can support intra-gNB-distributed unit (intra-gNB-DU) mobility, intra-gNB-central unit (intra-gNB-CU) mobility, and / or inter-gNB-DU mobility. Conditional L1 / L2 triggered mobility can support intra-frequency mobility and / or inter-frequency mobility. Conditional L1 / L2 triggered mobility can be supported for licensed spectrum. Conditional Layer 1 / Layer 2 triggered movement can support at least one of the following scenarios: major cell changes in non-carrier integration (non-CA) scenarios and / or non-dual connection (non-DC) scenarios; major and minor cell changes in carrier integration scenarios; and dual connection scenarios. Communication device 14 can execute Layer 3 handover commands transmitted by network terminal 12.

[0040] Figure 2 This is a schematic diagram of a communication device 20 according to an embodiment of the present invention. The communication device 20 may be... Figure 1The communication device 20 may include, but is not limited to, the communication device 14 or the network terminal 12. The communication device 20 may include at least one processing circuit 200, at least one storage device 210, and at least one communication interface device 220. The at least one processing circuit 200 may be a microprocessor or an application-specific integrated circuit (ASIC). The at least one storage device 210 may be any data storage device used to store program code 214. The at least one processing circuit 200 can read and execute the program code 214 through the at least one storage device 210. For example, at least one storage device 210 may be a Subscriber Identity Module (SIM), Read-Only Memory (ROM), flash memory, Random-Access Memory (RAM), Compact Disc ROM (CD-ROM), Digital Versatile Disc-ROM (DVD-ROM), Blu-ray Disc-ROM (BD-ROM), magnetic tape, hard disk, optical data storage device, non-volatile storage device, non-transitory computer-readable medium (e.g., tangible media), etc., but is not limited thereto. At least one communication interface device 220 may include at least one radio transceiver, which is used to transmit and receive signals (e.g., data, information, and / or packets) based on the processing results of at least one processing circuit 200.

[0041] Figure 3 This is a flowchart of process 30 according to an embodiment of the present invention. Process 30 is used in a communication device (e.g., Figure 1 Communication device 14 or Figure 2 The communication device 20 is used to process the reconstruction procedure. Process 30 can be compiled into program code 214, which includes the following steps: Step 300: Begin.

[0042] Step 302: Initiate the rebuild process.

[0043] Step 304: Select a target cell according to the cell selection procedure.

[0044] Step 306: After selecting the target cell according to the cell selection procedure, determine whether the target cell is a cell that the communication device can be able to camp on, based on a stored system information block 1 (SIB1), in response that the target cell does not provide a system information block 1.

[0045] Step 308: End.

[0046] According to process 30, the communication device initiates the reconstruction procedure. Next, according to the cell selection procedure, the communication device selects a target cell. After selecting the target cell according to the cell selection procedure, based on (e.g., through) the stored system information block 1, the communication device determines (e.g., verifies) whether the target cell is a cell that the communication device can reside in, in response to the target cell not providing system information block 1. That is, if the target cell does not provide system information block 1, the communication device applies the stored system information block 1 to execute the reconstruction procedure. The communication device does not need to execute the on-demand system information block 1 (OD-SIB1) procedure to request system information block 1 from the target cell. Therefore, the delay caused by executing the on-demand system information block 1 procedure can be overcome.

[0047] There are many ways to implement process 30, not limited to those described above. The following examples can be used for process 30.

[0048] In one embodiment, the cell that the communication device can reside in is the cell ranked highest according to the measurement results. In one embodiment, the stored system information block 1 includes at least one of the following: public land mobile network (PLMN) information; availability and scheduling of other system information blocks; and access control information. In one embodiment, the public land mobile network information is used to determine whether the target cell is a cell that the communication device can reside in. In one embodiment, the network-efficient cell provides system information block 1 on demand (i.e., not periodically).

[0049] In one embodiment, the step of selecting a target cell according to a cell selection procedure includes at least one of the following steps: setting at least one candidate target cell configuration with at least one candidate target cell; executing a cell selection procedure to find a select cell that meets the cell selection criteria; and determining the select cell as the target cell in response to the select cell being one of the at least one candidate target cell. In one embodiment, before executing (or initiating) the reconstruction procedure, the communication device sets at least one candidate target cell configuration with at least one candidate target cell. In one embodiment, the stored system information block 1 is stored in the at least one candidate target cell configuration.

[0050] In one embodiment, the communication device determines that the stored system information block 1 is valid (e.g., forever). In one embodiment, the communication device initiates a reconstruction procedure based on the failure of a normal handover. In one embodiment, the communication device initiates a reconstruction procedure based on the failure of a conditional handover. In one embodiment, the communication device initiates a reconstruction procedure based on a layer 1 / layer 2 triggered move or a conditional layer 1 / layer 2 triggered move. In one embodiment, in the handover command information, the communication device receives the stored system information block 1 from the target cell. In one embodiment, in the radio resource control (RRC) information (e.g., condRRCReconfig or LTM-Candidate), the communication device receives the stored system information block 1 from the target cell (or at least one candidate target cell).

[0051] In one embodiment, the communication device determines that the stored system information block 1 is valid in response to the current radio frame (RF) system frame number (SFN) being within a first specific period (e.g., SIB1_ValidPeriod). In another embodiment, the communication device determines that the stored system information block 1 is invalid in response to the current RF system frame number being outside the first specific period. In yet another embodiment, at the end of the first specific period, the communication device determines that the stored system information block 1 is invalid.

[0052] In one embodiment, the communication device determines a first specific time period (e.g., the range of the first specific time period). In one embodiment, the step of determining the first specific time period includes at least one of the following steps: determining whether the communication device is configured with a first system information (SI) change indication before initiating the reconstruction procedure; monitoring the first system information change indication during a third timer (e.g., T310) in response to the communication device not having a first system information change indication; monitoring the first system information change indication at the beginning of each preset default paging cycle in response to the communication device not having a first system information change indication; starting the first specific time period when monitoring the first system information change indication begins; and ending the first specific time period at the boundary of the first modification period in response to receiving a first system information change indication from the service cell of the communication device. That is, the communication device determines the end of the first specific time period by whether or not a first system information change indication is received.

[0053] In one embodiment, during a first modification period, the communication device receives a system information change indicator from the service cell. In one embodiment, the boundary of the first modification period is the end of the first modification period. In one embodiment, the boundary of the next first modification period is the end of the next first modification period. In one embodiment, the boundary of the next first modification period is the next modification period after the first modification period, wherein during the first modification period, the communication device receives the system information change indicator from the service cell. In one embodiment, the first system information change indicator is broadcast (e.g., via a short message).

[0054] In one embodiment, the communication device does not trigger the On-Demand System Information Block 1 procedure in response to the stored System Information Block 1 being valid. In another embodiment, based on the stored wake-up signal (WUS) configuration, the communication device triggers the On-Demand System Information Block 1 procedure to the target cell in response to the stored System Information Block 1 being invalid.

[0055] In one embodiment, the communication device verifies whether a stored wake-up signal configuration is valid. In one embodiment, the step of verifying the validity of a stored wake-up signal configuration includes at least one of the following steps: determining that the stored wake-up signal configuration is valid in response to the current wireless frame's system frame number being within a second specific time period (e.g., WUS_ValidPeriod); and determining that the stored wake-up signal configuration is invalid at the end of the second specific time period. In one embodiment, the step of verifying the validity of a stored wake-up signal configuration includes: determining that the stored wake-up signal configuration is invalid in response to the current wireless frame's system frame number being outside the second specific time period. In one embodiment, the step of verifying the validity of a stored wake-up signal configuration includes: determining that the stored wake-up signal configuration is invalid in response to initiating a rebuild procedure.

[0056] In one embodiment, the communication device determines the end of the second specific time period. In one embodiment, the step of determining the end of the second specific time period includes: receiving a set second system information change indication from a service cell during the second modification time period; and ending the second specific time period at its boundary. That is, the communication device determines the end of the second specific time period by whether or not a second system information change indication is received during the second modification time period. In one embodiment, the second system information change indication is broadcast (e.g., via SMS). In one embodiment, the boundary of the second modification time period is the end of the second modification time period. In one embodiment, the boundary of the second modification time period is defined by at least one system frame number value. In one embodiment, the system frame number value can be divided by the number of wireless frames containing the second modification time period. In one embodiment, the number of wireless frames is the product of a modification time period coefficient and a default paging cycle. In one embodiment, the modification time period coefficient is 2, 4, 8, or 16, but is not limited thereto. In one embodiment, at the boundary of the next second modification time period, the communication device ends the second specific time period in response to the second system information change indication not being set. In one embodiment, the boundary of the next second modification period is the end of the next second modification period. In one embodiment, at the boundary of the second modification period, the communication device ends the second specific period in response to the setting of the second system information change indication.

[0057] In one embodiment, the communication device checks whether a second system information change indication is set to determine the range of a second specific time period. In one embodiment, if a radio link failure (RLF) condition occurs, the communication device monitors the second system information change indication when a third timer (e.g., T310) is running. In one embodiment, the communication device monitors the second system information change indication at the beginning of each modification time period.

[0058] In one embodiment, the first system information change indication and the second system information change indication may be the same or different. In one embodiment, the first specific time period and the second specific time period may be the same or different. In one embodiment, the first modification time period and the second modification time period may be the same or different. In one embodiment, the next first modification time period and the next second modification time period may be the same or different.

[0059] In one embodiment, the On-Demand System Information Block 1 procedure includes at least one of the following steps: starting a monitoring window; monitoring (e.g., receiving) an acknowledgment (ACK) for the On-Demand System Information Block 1 request in the monitoring window (e.g., a random access response (RAR) or a Medium Access Control (MAC) control element (CE)); and stopping the monitoring window in response to receiving the acknowledgment for the On-Demand System Information Block 1 request from the target cell. That is, the communication device executes the On-Demand System Information Block 1 procedure to request the target cell to provide On-Demand System Information Block 1.

[0060] In one embodiment, the step of monitoring the confirmation request for On-Demand System Information Block 1 in the monitoring window includes: deciding (e.g., releasing) a stored wake-up signal configuration in response to monitoring window expiration. In another embodiment, the step of monitoring the confirmation request for On-Demand System Information Block 1 in the monitoring window includes at least one of the following steps: retransmitting the On-Demand System Information Block 1 request to the target cell in response to monitoring window expiration; incrementing a counter by 1 in response to the retransmission of the On-Demand System Information Block 1 request to the target cell; and determining that the target cell is a barring cell (e.g., a cell where the communication device cannot reside) in response to the counter value exceeding a threshold (e.g., ReEst-preambleTransMax). That is, if the communication device does not receive confirmation of the On-Demand System Information Block 1 request from the target cell, the communication device retransmits the On-Demand System Information Block 1 request to the target cell. In one embodiment, the communication device decides (e.g., declares) a failure of the On-Demand System Information Block 1 procedure in response to the counter value exceeding the threshold. In one embodiment, the threshold may be 0, 1, 2, 3, 4, 5, 6, 7, 8, 10, 20, 50, 100, or 200, but is not limited thereto. In one embodiment, the value of the counter represents the number of retries made by the communication device in executing the On-Demand System Information Block 1 procedure.

[0061] In one embodiment, the communication device starts a first counter (e.g., T310) in response to a detected wireless link problem. In one embodiment, the communication device stops the first counter in response to resolving the wireless link problem. In one embodiment, the communication device declares a wireless link failure in response to the first counter expiring. In one embodiment, the communication device initiates a reconstruction procedure in response to the declaration of wireless link failure.

[0062] In one embodiment, the communication device enters idle mode from connected mode in response to a failure of the reconstruction procedure. In another embodiment, the communication device restores the connection (e.g., to the target cell) in response to a successful execution of the reconstruction procedure.

[0063] In one embodiment, the communication device starts a second timer (e.g., T311) in response to the initiation of the reconstruction procedure. In one embodiment, the communication device stops the second timer in response to the execution of the reconstruction procedure (e.g., the communication device successfully resides in the target cell). In one embodiment, the communication device determines (e.g., declares) the failure of the reconstruction procedure in response to the expiration of the second timer.

[0064] In one embodiment, the communication device transmits a reconstruction request message (e.g., Msg3) to the target cell in response to the target cell being a cell to which the communication device can reside. In one embodiment, after transmitting the reconstruction request message to the target cell, the communication device receives reconstruction information (e.g., Msg4) from the target cell. In one embodiment, based on the reconstruction information, the communication device resides in the target cell (e.g., re-establishes a connection to the target cell).

[0065] In one embodiment, the communication device receives a set of wake-up signal configurations from a service cell. In one embodiment, the wake-up signal configuration set is received via a system information block. In one embodiment, after receiving the wake-up signal configuration set, the communication device stores the wake-up signal configuration set. In one embodiment, the wake-up signal configuration set includes multiple identities (IDs) for multiple cells, multiple frequencies corresponding to the multiple cells (e.g., respectively), and multiple wake-up signal configurations corresponding to the multiple cells (e.g., respectively). In one embodiment, the multiple cells include at least one candidate target cell. In one embodiment, the multiple wake-up signal configurations include at least one candidate target cell configuration.

[0066] In one embodiment, the wake-up signal configuration set further includes multiple indications corresponding to multiple wake-up signal configurations (e.g., respectively). In one embodiment, each of the multiple indications indicates whether the corresponding wake-up signal configuration is supported by the communication device in connected mode. In one embodiment, the communication device receives a cell list from a service cell. In one embodiment, the cell list indicates which wake-up signal configurations in the wake-up signal configuration set are supported by the communication device in connected mode.

[0067] In one embodiment, the communication device determines that the target cell is not a cell in which the communication device can reside, in response that the target cell does not support the On-Demand System Information Block 1 procedure. In another embodiment, the communication device adds the condition "target cell supports On-Demand System Information Block 1 procedure" to at least one triggering condition of On-Demand System Information Block 1 procedure, in response that the target cell does not support the On-Demand System Information Block 1 procedure.

[0068] In one embodiment, the stored wake-up signal configuration set further includes multiple thresholds (e.g., ReEst-preambleTransMax) corresponding to multiple wake-up signal configurations (e.g., respectively). In one embodiment, each of the multiple thresholds indicates the maximum number of retries the communication device in connection mode can make to execute the On-Demand System Information Block 1 procedure according to the corresponding wake-up signal configuration. In one embodiment, the communication device determines the target cell as a cell that the communication device can reside in in response to the number of retries not exceeding one of the corresponding thresholds. In one embodiment, the communication device determines (e.g., releases) the wake-up signal configuration set in response to the number of retries exceeding one of the corresponding thresholds.

[0069] In one embodiment, the communication device decides (e.g., releases) a set of wake-up signal configurations in response to initiate a rebuild procedure.

[0070] Figure 4 This is a flowchart of process 40 according to an embodiment of the present invention. Process 40 is used for a service cell (or service base station) (e.g., Figure 1 One cell in network terminal 12, Figure 2 The communication device 20 or the service cell in the embodiment of process 30 (to process the reconstruction procedure). Process 40 can be compiled into program code 214, and includes the following steps: Step 400: Begin.

[0071] Step 402: Transmit a set of wake-up signal configurations to a communication device, wherein the set of wake-up signal configurations includes multiple identifiers for multiple cells, multiple frequencies corresponding to the multiple cells, and multiple wake-up signal configurations corresponding to the multiple cells.

[0072] Step 404: End.

[0073] According to process 40, the service cell transmits a set of wake-up signal configurations to a communication device (e.g., the communication device in process 30). The set of wake-up signal configurations includes multiple identifiers for multiple cells, multiple frequencies corresponding to multiple cells (e.g., each), and multiple wake-up signal configurations corresponding to multiple cells (e.g., each).

[0074] There are many ways to implement process 40, not limited to those described above. The following examples can be used for process 40.

[0075] In one embodiment, the plurality of cells include service cells. In another embodiment, the plurality of cells include at least one neighboring cell of the service cell.

[0076] In one embodiment, a wake-up signal configuration set is transmitted via a system information block. In another embodiment, the wake-up signal configuration set further includes multiple indicators corresponding to multiple wake-up signal configurations (e.g., respectively). In one embodiment, each of the multiple indicators indicates whether the corresponding wake-up signal configuration is supported by the communication device in connected mode.

[0077] In one embodiment, the service cell transmits a cell list to the communication device. In another embodiment, the cell list indicates which wake-up signal configurations in the wake-up signal configuration set are supported by the communication device in connected mode.

[0078] In one embodiment, the wake-up signal configuration set further includes multiple thresholds corresponding to multiple wake-up signal configurations (e.g., respectively). In one embodiment, each of the multiple thresholds indicates the maximum number of retries by which the communication device in the connection mode executes the On-Demand System Information Block 1 procedure according to the corresponding wake-up signal configuration.

[0079] The embodiments of process 30 can be applied to process 40, and will not be described in detail here.

[0080] Figure 5 This is a flowchart of process 50 according to an embodiment of the present invention. Process 50 is used in a network energy-saving cell (or network energy-saving base station) (e.g. Figure 1 One cell in network terminal 12, Figure 2 The target cell in the embodiment of communication device 20 or process 30 is used to process the reconstruction procedure. Process 50 can be compiled into program code 214, which includes the following steps: Step 500: Begin.

[0081] Step 502: Receive a rebuild request message from a communication device in response to the communication device selecting the network power-saving cell according to a cell selection procedure and determining the network power-saving cell as a cell that the communication device can reside in according to a stored system information block 1.

[0082] Step 504: End.

[0083] According to process 50, the network power-saving cell receives a reconstruction request message (e.g., Msg3) from a communication device (e.g., the communication device in process 30) in response to the communication device selecting the network power-saving cell according to the cell selection procedure and determining (e.g., verifying) the network power-saving cell as a cell that the communication device can reside in based on (e.g., through) the stored system information block 1. That is, the network power-saving cell does not need to provide system information block 1 to the communication device because the communication device uses the stored system information block 1 to execute the reconstruction procedure. Therefore, the on-demand system information block 1 procedure is not executed, and the delay caused by executing the on-demand system information block 1 procedure can be overcome.

[0084] In one embodiment, the cell that the communication device can reside in is the cell ranked highest based on the measurement results. In one embodiment, the stored system information block 1 is stored in at least one candidate target cell configuration. In one embodiment, the stored system information block 1 includes at least one of the following: public land mobile network information; availability and scheduling of other system information blocks; and access control information. In one embodiment, the public land mobile network information is used to determine whether a network-saving cell is a cell that the communication device can reside in.

[0085] In one embodiment, the stored system information block 1 is valid (e.g., always). In one embodiment, the stored system information block 1 is valid (or determined to be valid) in response to the current wireless frame's system frame number being within a specific time period (e.g., the first specific time period in the embodiment of process 30). In one embodiment, the stored system information block 1 is invalid (or determined to be invalid) in response to the current wireless frame's system frame number being outside the specific time period. In one embodiment, at the end of the specific time period, the stored system information block 1 is invalid (or determined to be invalid).

[0086] In one embodiment, the network energy-saving cell transmits reconstruction information (e.g., Msg4) to the communication device in response to the reconstruction request information.

[0087] The embodiments of processes 30 to 40 can be applied to process 50, and will not be described in detail here.

[0088] Figure 6 This is a timing diagram of process 60 in Embodiment 1 of the present invention. Figure 6The system includes a communication device CM, a service cell SC of the communication device CM, and a target cell TC of the communication device CM. The communication device CM is in idle mode or inactive mode. In step 600, the service cell SC transmits at least one candidate target cell configuration to the communication device CM. The at least one candidate target cell configuration includes a stored system information block 1. In step 602, the communication device CM sets at least one candidate target cell. In step 604, according to the cell selection procedure, the communication device CM selects the target cell TC. The target cell TC is one of the at least one candidate target cells. In step 606, according to the stored system information block 1, the communication device CM determines whether the target cell TC is a cell that the communication device CM can reside in. In step 608, if the target cell TC is a cell that the communication device CM can reside in, the communication device CM transmits a reconstruction request to the target cell TC and resides in the target cell TC.

[0089] Figure 7 This is a timing diagram of process 70 in Embodiment 1 of the present invention. Figure 7 The system includes a communication device CM, a service cell SC of the communication device CM, and a target cell TC of the communication device CM. The communication device CM is in connected mode. In step 700, the service cell SC transmits at least one candidate target cell configuration to the communication device CM. The at least one candidate target cell configuration includes a stored system information block 1. In step 702, the communication device CM sets the at least one candidate target cell. In step 704, the communication device CM detects a wireless link problem and starts a first timer. In step 706, the communication device CM declares a wireless link failure in response to the first timer expiring. In step 708, the communication device CM initiates a reconstruction procedure. In step 710, according to the cell selection procedure, the communication device CM selects the target cell TC. The target cell TC is one of the at least one candidate target cells. In step 712, according to the stored system information block 1, the communication device CM determines whether the target cell TC is a cell that the communication device CM can reside in. In step 714, the communication device CM transmits a reconstruction request message to the target cell TC in response to the target cell TC being a cell in which the communication device CM can reside. In step 716, the target cell TC transmits reconstruction information to the communication device CM in response to the reconstruction request message. In step 718, based on the reconstruction information, the communication device CM resides in the target cell TC.

[0090] Figure 8 This is a schematic diagram illustrating a specific time period (SP) used in an embodiment of the present invention to verify the validity of a stored system information block 1. Figure 8There is a time axis T, and on time axis T, there are two modification periods MP1-MP2 and three boundary periods MPB1-MPB3. Boundary MPB1 marks the beginning of modification period MP1. Boundary MPB2 marks the end of modification period MP1 and the beginning of modification period MP2. Boundary MPB3 marks the end of modification period MP2. The arrows within modification period MP1 represent the time points at which the communication device begins monitoring information system change instructions from the service cell. The time points represented by the arrows are the beginning of specific time periods SP. Since the communication device did not receive an information system change instruction, at boundary MPB3, the communication device ends specific time periods SP. Therefore, the communication device determines that stored system information block 1 is valid in response to the current system frame number of the wireless frame in specific time periods SP. At the end of specific time periods SP, the communication device determines that stored system information block 1 is invalid.

[0091] Figure 9 This is a schematic diagram illustrating a specific time period (SP) used in an embodiment of the present invention to verify the validity of a stored system information block 1. Figure 9 There is a time axis T, and on time axis T, there are two modification periods MP1-MP2 and three boundary periods MPB1-MPB3. Boundary MPB1 marks the beginning of modification period MP1. Boundary MPB2 marks the end of modification period MP1 and the beginning of modification period MP2. Boundary MPB3 marks the end of modification period MP2. The arrows within modification period MP1 represent the time points at which the communication device begins monitoring information system change instructions from the service cell. The time points represented by the arrows are the beginning of specific time periods SP. Due to receiving information system change instructions, at boundary MPB2, the communication device ends specific time periods SP. Therefore, the communication device determines that stored system information block 1 is valid in response to the current system frame number of the wireless frame in specific time periods SP. At the end of specific time periods SP, the communication device determines that stored system information block 1 is invalid.

[0092] The terms "first," "second," and "third" used above are for distinguishing related statements, not for restricting the order of related statements. The word "determine" used in the above description can be replaced with "compute," "calculate," "obtain," "generate," "output," "use," "choose / select," "decide," or "is configured to." The word "according to" used in the above description can be replaced with "in response to." The word "via" used in the above description can be replaced with "on," "in," or "at." The words "when," "if," or "since" used in the above description can be replaced with "in response to." The phrase "wake-up signal configuration" used in the above description can be replaced with "random access program configuration."

[0093] Those skilled in the art can combine, modify, or change the above-described embodiments in accordance with the spirit of the present invention, but are not limited thereto. The foregoing statements, steps, and / or processes (including suggested steps) can be implemented by a device, which can be hardware, software, firmware (a combination of hardware device and computer instructions and data, where the computer instructions and data are read-only software on the hardware device), electronic system, or a combination of the above devices, wherein the device can be a communication device.

[0094] The hardware may be analog microcomputer circuits, digital microcomputer circuits, and / or hybrid microcomputer circuits. For example, the hardware may be an application-specific integrated circuit, a field-programmable gate array (FPGA), a programmable logic device, coupled hardware components, or a combination of the above. In other embodiments, the hardware may include a general-purpose processor, a microprocessor, a controller, a digital signal processor (DSP), or a combination of the above.

[0095] Software can be a combination of program code, instructions, and / or functions, stored (e.g., in a storage unit, such as a computer-readable medium). For example, a computer-readable medium can be a user identification module, read-only memory, flash memory, random access memory, optical disc read-only memory (CD-ROM / DVD-ROM / BD-ROM), magnetic tape, hard disk, optical data storage device, non-volatile storage unit, or a combination of the above. The computer-readable medium (such as a storage unit) can be internally coupled to at least one processor (such as a processor integrated with the computer-readable medium) or externally coupled to at least one processor (such as a processor independent of the computer-readable medium). The at least one processor may include (e.g., be configured to) one or more modules to execute the software stored on the computer-readable medium. The combination of program code, instructions, and / or functions can cause at least one processor, one or more modules, hardware, and / or electronic systems to perform relevant steps.

[0096] The electronic system may be a system on chip (SoC), system in package (SiP), computer on module (CoM), computer programmable product, device, mobile phone, notebook computer, tablet computer, e-book, portable computer system, and communication device 20.

[0097] Based on the above description, the present invention provides a method and a communication device for processing a reconstruction procedure. The communication device uses the stored system information block 1 to execute the reconstruction procedure, thus eliminating the need to execute the on-demand system information block 1 procedure to request system information block 1 from the target cell. Therefore, the problem of processing the reconstruction procedure can be solved.

[0098] The foregoing outlines the features of several embodiments, enabling those skilled in the art to fully understand the various aspects of the invention. Those skilled in the art should recognize that the invention provides a basis for designing or modifying other processes and structures to achieve substantially the same functionality and / or results as the embodiments described above. Furthermore, such equivalent configurations do not depart from the spirit and scope of the invention, and various changes, substitutions, and modifications can be made without departing from that spirit and scope.

Claims

1. A method for processing a reconstruction procedure in a communication device, characterized in that, Includes: Initiate the reconstruction process; Select a target cell according to a cell selection procedure; as well as After selecting the target cell according to the cell selection procedure, it is determined whether the target cell is a cell that the communication device can reside in, based on a stored system information block 1, in response to the target cell not providing a system information block 1.

2. The method of claim 1, wherein the step of selecting the target cell according to the cell selection procedure comprises at least one of the following steps: Set at least one candidate target cell with at least one candidate target cell configuration; The cell selection procedure is executed to find selected cells that meet the cell selection criteria; and The selected cell is determined as the target cell, in response to the selected cell being one of the at least one candidate target cells.

3. The method of claim 2, wherein before performing the reconstruction procedure, the communication device sets at least one candidate target cell with at least one candidate target cell configuration.

4. The method of claim 1, wherein the stored system information block 1 is stored in at least one candidate target cell configuration.

5. The method of claim 1, further comprising: The system information block 1 of the storage is determined to be valid.

6. The method of claim 1, further comprising: The system information block 1 stored is determined to be valid in response to a system frame number of a current wireless frame during a specific time period; and The system information block 1 of the storage is invalidated in response to the current wireless frame's system frame number being outside of that specific time period.

7. A method for a service cell processing-reconstruction procedure, characterized in that, Includes: Transmit a wake-up signal configuration set to a communication device; The wake-up signal configuration set includes multiple identifications for multiple cells, multiple frequencies corresponding to the multiple cells, and multiple wake-up signal configurations corresponding to the multiple cells. The plurality of cells includes the service cell and at least one neighboring cell of the service cell.

8. The method of claim 7, wherein the wake-up signal configuration set further includes a plurality of indicators corresponding to the plurality of wake-up signal configurations.

9. The method of claim 8, wherein each of the plurality of indications indicates whether a corresponding wake-up signal configuration is supported by the communication device in a connection mode.

10. The method of claim 7, further comprising: Send a list of cells to the communication device; The cell list indicates which wake-up signal configurations in the wake-up signal configuration set are supported by the communication device in a connection mode.

11. The method of claim 7, wherein the wake-up signal configuration set further includes a plurality of thresholds corresponding to the plurality of wake-up signal configurations.

12. The method of claim 11, wherein each of the plurality of thresholds indicates a maximum number of retries for the communication device in a connection mode to execute an on-demand system information block 1 procedure according to a corresponding wake-up signal configuration.

13. A method for a network energy-saving cell processing and reconstruction procedure, characterized in that, Includes: A rebuild request is received from a communication device in response to the communication device selecting the network power-saving cell according to a cell selection procedure and determining the network power-saving cell as a cell that the communication device can reside in according to a stored system information block 1.

14. The method of claim 13, wherein the stored system information block 1 is stored in at least one candidate target cell configuration.

15. The method of claim 13, wherein the stored system information block 1 is valid.

16. The method of claim 13, wherein the stored system information block 1 is valid in response to a system frame number of a current wireless frame during a specific time period.

17. The method of claim 13, wherein the stored system information block 1 is invalidated in response to a system frame number of a current wireless frame outside a specific time period.

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