Devices and methods for energy saving communication in a mobile network
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- HUAWEI TECH CO LTD
- Filing Date
- 2024-09-10
- Publication Date
- 2026-06-04
Smart Images

Figure CN2024118060_04062026_PF_FP_ABST
Abstract
Description
DEVICES AND METHODS FOR ENERGY SAVING COMMUNICATION IN A MOBILE NETWORKTECHNICAL FIELD
[0001] The present invention relates to wireless communications. More specifically, the present invention relates to devices, in particular UEs and base stations, and methods for energy saving communication in a mobile network, in particular a 3GPP mobile network.BACKGROUND
[0002] Network energy saving is of great importance for environmental sustainability, to reduce environmental impact (greenhouse gas emissions) , and for operational cost savings. As a future communication network is on the horizon, handling more advanced services and applications requiring very high data rates (e.g. XR) , networks are being denser, use more antennas, larger bandwidths and more frequency bands. The environmental impact of 5G advance and future communication networks needs to stay under control, and novel solutions to improve network energy savings need to be developed.
[0003] Energy consumption accounts for a substantial portion of the costs for operating a mobile network. Most of the energy consumption comes from operating the radio access network (s) and in particular from the Active Antenna Unit (AAU) , with data centers and fiber transport accounting for a smaller share. The power consumption of a radio access network can be split into two parts: the dynamic part which is only consumed when data transmission / reception is ongoing, and the static part which is consumed to maintain the necessary operation of the radio access devices, even when the data transmission / reception is not on-going.SUMMARY
[0004] It is an objective of the present disclosure to provide improved devices, in particular UEs and base stations, and methods for energy saving communication in a mobile network, in particular a 3GPP mobile network.
[0005] The foregoing and other objectives are achieved by the subject matter of the independent claims. Further implementation forms are apparent from the dependent claims, the description and the figures. In the following some or more of the following abbreviations and acronyms will be used:
[0006] LTE Long Term Evolution;
[0007] 5G 5th generation mobile networks;
[0008] UE User Equipment;
[0009] RRC Radio Resource Control;
[0010] NR New Radio;
[0011] TRP Transmission Reception Point;
[0012] PUCCH Physical Uplink Control Channel;
[0013] PUSCH Physical Uplink Shared Channel;
[0014] PDCCH Physical Downlink Control Channel;
[0015] PDSCH Physical Downlink Shared Channel;
[0016] MAC Medium Access Control;
[0017] MAC CE MAC Control Element;
[0018] DRX Discontinuous Reception;
[0019] DCI Downlink Control Information;
[0020] SPS Semi Persistent Scheduling;
[0021] HARQ Hybrid Automatic Repeat request;
[0022] CG Configured Grant;
[0023] DG Dynamic Grant;
[0024] OD-SIB1 On-Demand SIB1;
[0025] NES Network energy saving;
[0026] TA Time Advance;
[0027] UL WUS UpLink Wake Up Signal for requesting OD-SIB1;
[0028] EMF ElectroMagnetic Field.
[0029] According to a first aspect a communication apparatus for a mobile network, in particular a 3GPP mobile network, is provided. The communication apparatus according to the first aspect is configured to transmit an Uplink, UL, Wake Up Signal, WUS, (herein also referred to as WUS request) to a further communication apparatus. Moreover, the communication apparatus is configured to receive a WUS response from the further communication apparatus, wherein the WUS response comprises an indication of a transmission status of an On-Demand, OD, System Information Block 1, SIB1, message from the further communication apparatus and wherein the OD-SIB1 message comprises at least a portion of a System Information Block 1. The wake-up scheme implemented by the communication apparatus according to the first aspect results in increased energy savings of the communication apparatus according to the first aspect and in less UL interference emission from the communication apparatus according to the first aspect. Moreover, this provides the further communication apparatus of the NES cell with greater flexibility in not having to provide OD-SIB1 immediately to the WUS request from the communication apparatus, for instance, due to power saving requirements or other decision-making processing, such as EMF mitigation features in the further communication apparatus.
[0030] In a further possible implementation form, the communication apparatus is a User Equipment, UE, for a Network Energy Saving, NES, cell of the mobile network and the further communication apparatus is a base station of the NES cell.
[0031] In a further possible implementation form, the indication of the transmission status of the OD SIB1 message is indicative of whether or not the OD SIB1 message is going to be transmitted, e.g. broadcasted by the further communication apparatus, e.g. the base station of the NES cell.
[0032] In a further possible implementation form, the communication apparatus according to the first aspect, e.g. the UE, is configured to communicate via a plurality of beams with the further communication apparatus, e.g. the base station of the NES cell, and the indication of the transmission status of the OD SIB1 message comprises an indication of the transmission status of the OD SIB1 message of a respective OD SIB1 message on one or more of the plurality of beams.
[0033] In a further possible implementation form, the WUS response further comprises an indication of a time period T during which the communication apparatus according to the first aspect is configured not to monitor the transmission of the OD-SIB1 message and not to send a further UL WUS to the further communication apparatus, wherein after the expiry of the time period T the communication apparatus according to the first aspect is configured to monitor the transmission of the OD-SIB1 message, if the transmission status of the OD SIB1 message is set to broadcast in the WUS response, and not to monitor the transmission of the OD-SIB1 message and configured to send a further UL WUS, if the transmission status of the OD SIB1 message is set to not broadcast in the WUS response.
[0034] In a further possible implementation form, the WUS response further comprises an indication of a time period T1 during which the communication apparatus according to the first aspect is configured to monitor the transmission of the OD-SIB1 message, if the transmission status of the OD SIB1 message is set to broadcast in the WUS response, and not to monitor the transmission of the OD-SIB1 message, if the transmission status of the OD SIB1 message is set to not broadcast in the WUS response, wherein after the expiry of the time period T1 the communication apparatus according to the first aspect is configured to send a further UL WUS to the further communication apparatus and / or configured to receive the OD-SIB1 message from the further communication apparatus.
[0035] In a further possible implementation form, the WUS response further comprises an indication of a time period T2 during which the communication apparatus according to the first aspect is configured to monitor the transmission of the OD-SIB1 message, if the transmission status of the OD SIB1 message is set to broadcast in the WUS response, and not to monitor the transmission of the OD-SIB1 message, if the transmission status of the OD SIB1 message is set to not broadcast in the WUS response, wherein after the expiry of the time period T2 the communication apparatus according to the first aspect is configured to not to monitor the transmission of the OD-SIB1 message, if the transmission status of the OD SIB1 message is set to broadcast in the WUS response, and to monitor the transmission of the OD-SIB1 message, if the transmission status of the OD SIB1 message is set to not broadcast in the WUS response.
[0036] In a further possible implementation form, the communication apparatus according to the first aspect, e.g. the UE, is configured to communicate via a plurality of beams with the further communication apparatus, e.g. the base station of the NES cell, wherein the indication of the time period comprises an indication of a respective time period for one or more of the plurality of beams.
[0037] In a further possible implementation form, the communication apparatus according to the first aspect, e.g. the UE, is configured to receive a Random Access Response, RAR, message from the further communication apparatus, e.g. the base station of the NES cell, wherein the RAR message comprises the WUS response.
[0038] According to a second aspect a method is provided for operating a communication apparatus, e.g. a UE, in a mobile network. The method according to the second aspect comprises:
[0039] transmitting an Uplink, UL, Wake Up Signal, WUS, to a further communication apparatus, e.g. a base station of a NES cell; and
[0040] receiving a WUS response from the further communication apparatus, e.g. the base station of the NES cell, wherein the WUS response comprises an indication of a transmission status of an On-Demand, OD, System Information Block 1, SIB1, message from the further communication apparatus, e.g. the base station of the NES cell, and wherein the OD-SIB1 message comprises at least a portion of a System Information Block 1, i.e. SIB1.
[0041] The method according to the second aspect can be performed by the communication apparatus according to the first aspect, e.g. the UE. Thus, further features of the method according to the second aspect result directly from the functionality of the communication apparatus according to the first aspect as well as its different implementation forms described above and below.
[0042] According to a third aspect a communication apparatus for a mobile network is provided. The communication apparatus according to the third aspect is configured to receive an Uplink, UL, Wake Up Signal, WUS, from a further communication apparatus. Moreover, the communication apparatus according to the third aspect is configured to transmit a WUS response to the further communication apparatus, wherein the WUS response comprises an indication of a transmission status of an On-Demand, OD, System Information Block 1, SIB1, message to the further communication apparatus and wherein the OD-SIB1 message comprises at least a portion of a System Information Block 1, i.e. SIB1. The wake-up scheme implemented by the communication apparatus according to the third aspect results in increased power savings of the communication apparatus according to the third aspect and in less UL interference emission from the further communication apparatus.
[0043] In a further possible implementation form, the communication apparatus according to the third aspect is a base station of a Network Energy Saving, NES, cell of the mobile network and the further communication apparatus is a User Equipment, UE, for the NES cell in the mobile network.
[0044] In a further possible implementation form, the indication of the transmission status of the OD SIB1 message is indicative of whether or not the OD SIB1 message is going to be transmitted, e.g. broadcasted by the communication apparatus according to the third aspect, e.g. the base station of the NES cell.
[0045] In a further possible implementation form, the communication apparatus according to the third aspect, e.g. the base station of the NES cell, is configured to communicate via a plurality of beams with the further communication apparatus, e.g. the UE, wherein the indication of the transmission status of the OD SIB1 message comprises an indication of the transmission status of the OD SIB1 message of a respective OD SIB1 message on one or more of the plurality of beams.
[0046] In a further possible implementation form, the WUS response further comprises an indication of a time period T during which the further communication apparatus is configured not to monitor the transmission of the OD-SIB1 message and not to send a further UL WUS to the communication apparatus according to the third aspect, wherein after the expiry of the time period T the further communication apparatus is configured to monitor the transmission of the OD-SIB1 message, if the transmission status of the OD SIB1 message is set to broadcast in the WUS response, and not to monitor the transmission of the OD-SIB1 message and configured to send a further UL WUS, if the transmission status of the OD SIB1 message is set to not broadcast in the WUS response.
[0047] In a further possible implementation form, the WUS response further comprises an indication of a time period T1 during which the further communication apparatus is configured to monitor the transmission of the OD-SIB1 message, if the transmission status of the OD SIB1 message is set to broadcast in the WUS response, and not to monitor the transmission of the OD-SIB1 message, if the transmission status of the OD SIB1 message is set to not broadcast in the WUS response, wherein after the expiry of the time period T1 the further communication apparatus is configured to send a further UL WUS to the communication apparatus according to the third aspect and / or configured to receive the OD-SIB1 message from the communication apparatus according to the third aspect.
[0048] In a further possible implementation form, the WUS response further comprises an indication of a time period T2 during which the further communication apparatus is configured to monitor the transmission of the OD-SIB1 message, if the transmission status of the OD SIB1 message is set to broadcast in the WUS response, and not to monitor the transmission of the OD-SIB1 message, if the transmission status of the OD SIB1 message is set to not broadcast in the WUS response, wherein after the expiry of the time period T2 the further communication apparatus is configured to not to monitor the transmission of the OD-SIB1 message, if the transmission status of the OD SIB1 message is set to broadcast in the WUS response, and to monitor the transmission of the OD-SIB1 message, if the transmission status of the OD SIB1 message is set to not broadcast in the WUS response.
[0049] In a further possible implementation form, the communication apparatus according to the third aspect, e.g. base station of the NES cell, is configured to communicate via a plurality of beams with the further communication apparatus, e.g. the UE, wherein the indication of the time period comprises an indication of a respective time period for one or more of the plurality of beams.
[0050] In a further possible implementation form, the communication apparatus according to the third aspect, e.g. the base station of the NES cell, is configured to transmit a Random Access Response, RAR, message to the further communication apparatus, e.g. the UE, wherein the RAR message comprises the WUS response.
[0051] According to a fourth aspect a method is provided for operating a communication apparatus, e.g. a base station of a NES cell, in a mobile network. The method according to the fourth aspect comprises:
[0052] receiving an Uplink, UL, Wake Up Signal, WUS, from a further communication apparatus, e.g. a UE; and
[0053] transmitting a WUS response to the further communication apparatus, e.g. the UE, wherein the WUS response comprises an indication of a transmission status of an On-Demand, OD, System Information Block 1, SIB1, message to the further communication apparatus, e.g. the UE, wherein the OD-SIB1 message comprises at least a portion of a System Information Block 1.
[0054] The method according to the fourth aspect can be performed by the communication apparatus according to the third aspect, e.g. the NES cell base station. Thus, further features of the method according to the fourth aspect result directly from the functionality of the communication apparatus according to the third aspect as well as its different implementation forms described above and below.
[0055] According to a fifth aspect a computer program product is provided, comprising program code which causes a computer or a processor to perform the method according to the second aspect or the method according to the fourth aspect, when the program code is executed by the computer or the processor.
[0056] Details of one or more embodiments are set forth in the accompanying drawings and the description below. Other features, objects, and advantages will be apparent from the description, drawings, and claims.BRIEF DESCRIPTION OF THE DRAWINGS
[0057] In the following, embodiments of the present disclosure are described in more detail with reference to the attached figures and drawings, in which:
[0058] FIG. 1 shows a schematic diagram illustrating a mobile network including a communication apparatus according to an embodiment in the form of a NES cell base station in communication with a plurality of further communication apparatuses according to an embodiment in the form of UEs;
[0059] FIG. 2A shows a signalling diagram illustrating a wake-up scheme implemented by a conventional NES cell base station and a conventional UE;
[0060] FIGS. 2B to 2E show a respective signalling diagram illustrating a wake-up scheme implemented by a communication apparatus according to an embodiment in the form of a NES cell base station and a further communication apparatus according to an embodiment in the form of a UE;
[0061] FIG. 3 shows a flow diagram illustrating steps of a method for operating a communication apparatus in the form of a UE according to an embodiment; and
[0062] FIG. 4 shows a flow diagram illustrating steps of a method for operating a communication apparatus in the form of a NES cell base station according to an embodiment.
[0063] In the following, identical reference signs refer to identical or at least functionally equivalent features.
[0064] DETAILED DESCRIPTION OF THE EMBODIMENTS
[0065] In the following description, reference is made to the accompanying figures, which form part of the disclosure, which illustrate specific aspects of embodiments of the present disclosure or specific aspects in which embodiments of the present disclosure may be used. It is understood that embodiments of the present disclosure may be used in other aspects and comprise structural or logical changes not depicted in the figures. The following detailed description, therefore, is not to be taken in a limiting sense, and the scope of the present disclosure is defined by the appended claims.
[0066] For instance, it is to be understood that a disclosure in connection with a described method may also hold true for a corresponding device or system configured to perform the method and vice versa. For example, if one or a plurality of specific method steps are described, a corresponding device may include one or a plurality of units, e.g. functional units, to perform the described one or plurality of method steps (e.g. one unit performing the one or plurality of steps, or a plurality of units each performing one or more of the plurality of steps) , even if such one or more units are not explicitly described or illustrated in the figures. On the other hand, for example, if a specific apparatus is described based on one or a plurality of units, e.g. functional units, a corresponding method may include one step to perform the functionality of the one or plurality of units (e.g. one step performing the functionality of the one or plurality of units, or a plurality of steps each performing the functionality of one or more of the plurality of units) , even if such one or plurality of steps are not explicitly described or illustrated in the figures. Further, it is understood that the features of the various exemplary embodiments and / or aspects described herein may be combined with each other, unless specifically noted otherwise.
[0067] FIG. 1 shows a portion of a mobile network 100, in particular a mobile network in accordance with the 3GPP framework of standards, such as a 5G or future communication networks. The mobile network 100 comprises a communication apparatus 110a, which in the embodiment shown in FIG. 1 is implemented as a NES cell base station 110a configured to provide network access to one or more further communication apparatuses 120a-c, which in the embodiment shown in FIG. 1 are implemented as user equipments, UEs, 120a-c. Moreover, the mobile network 100 may comprise one or more further base stations 110b, which together with the NES cell base station 110a form a radio access network, RAN, of the mobile network 100.
[0068] As illustrated in FIG. 1, the communication apparatus 110a in the form of the NES cell base station 110a may comprise a processing circuitry 111 and a communication interface 113, in particular a communication interface 113 enabling communication in accordance with the 3GPP framework of standards over a channel 130. The processing circuitry 111 may be implemented in hardware and / or software and may comprise digital circuitry, or both analog and digital circuitry. Digital circuitry may comprise components such as application-specific integrated circuits (ASICs) , field-programmable gate arrays (FPGAs) , digital signal processors (DSPs) , or general-purpose processors. The communication apparatus 110a in the form of the NES cell base station 110a may further comprise a memory 115 configured to store executable program code which, when executed by the processing circuitry 111, causes the communication apparatus 110a to perform the functions and methods described herein.
[0069] Likewise, as indicated in figure for the exemplary communication apparatus 120a implemented in the form of a UE 120a, the communication apparatuses 120a-c, in particular UEs 120a-c, may comprise a processing circuitry 121 and a communication interface 123, in particular a communication interface 123 enabling a communication in accordance with the 3GPP framework of standards over the channel 130. The processing circuitry 121 may be implemented in hardware and / or software and may comprise digital circuitry, or both analog and digital circuitry. Digital circuitry may comprise components such as application-specific integrated circuits (ASICs) , field-programmable gate arrays (FPGAs) , digital signal processors (DSPs) , or general-purpose processors. Each communication apparatus 120a-c, e.g. UE 120a-c may further comprise a memory 125 configured to store executable program code which, when executed by the processing circuitry 121, causes the communication apparatus 120a-c, e.g. UE 120a-c to perform the functions and methods described herein.
[0070] Before describing more detailed embodiments of the communication apparatus 110a implemented in the form of the NES cell base station 110a and the communication apparatus 120a implemented in the form of a UE 120a in the following a wake-up scheme implemented by a conventional NES cell base station 10a and a conventional UE 20a (which as indicated in FIG. 2A may be in an inactive or idle state) is described in the context of FIG. 2A. In the conventional wake up scheme shown in FIG. 2A the base station 10b provides an UL WUS configuration to the UE 20a (step 21) . As part of a OD-SIB1 procedure, in a step 22 the UE 20a sends a UL WUS (based on the configuration provided by the base station 10b) via a PRACH to the NES cell base station 10a. In response to the UL WUS, the NES cell base station 10a sends a Random Access Response, RAR, in step 23 and an OD-SIB1 message in step 24 to the UE 20a. Thus, as will be appreciated, the UE 20a first requests OD-SIB1 (step 22) , receives OD-SIB1 (step 24) , and then, if the UE 20a has data or has been paged, the UE 20a starts a 4-step RACH procedure for initial access, including the steps 25, 26, 27 and 28. More specifically, in step 25 the UE 20a sends a PRACH preamble. The preamble transmission normally take place with a relatively large uncertainty in the required transmit power. Therefore, the preamble transmission step includes a power ramping mechanism where the preamble may be repeatedly transmitted with a transmit power that is increased between each transmission. In step 26, the UE 20a receives a random-access response. In step 27, the UE 20a transmits the necessary messages to the base station 10a, e.g. gNB 10a using the UL-SCH resources assigned in the random-access response in step 26. In step 28, the UE 20a receives the contention resolution message to ensure that a device does not incorrectly use another device’s identity.
[0071] The four-step random-access procedure, shown in steps 25, 26, 27 and 28, also referred to as four-step RACH, was introduced as part of the first NR release, that is, 3GPP release 15. A complementary two-step random-access procedure, or two-step RACH, was introduced in release 16. Somewhat simplified, the two-step random-access procedure combines step 25 and step 27 into a single Step A. It also combines step 26 and 28 into a single Step B. More specifically, the two-step random-access procedure consists of Step A, including uplink preamble / PRACH transmission together with a PUSCH data transmission (jointly referred to as message A) and a Step B, including a single downlink transmission (referred to as message B) indicating reception of message A, providing time alignment and resolving any collision that may have occurred in Step A. Alternatively, the message B may include an fallback indication for fallback to four-stage RACH. Latest specification details of 2-steps PRACH and 4-steps PRACH can be found in 3GPP TS 38.213 V18.3.0 (2024-7) , section 8.
[0072] FIGS. 2B to 2E show a respective signalling diagram illustrating a wake-up scheme implemented by the communication apparatus 110a according to a respective embodiment in the form of a NES cell base station 110a and the further communication apparatus 120a according to a respective embodiment in the form of the UE 120a. As will be described in more detail in the following, embodiments disclosed herein allow the UE 120a to be informed that the base station 110a of the NES cell has received its WUS request, and the status of the OD-SIB1 transmission that the UE should assume in the following time periods to the reception of the WUS response. Enabling the UE 120a to know that the WUS request has been received and the status of the OD-SIB1 transmission that the UE should assume in the following time periods to the reception of the WUS response is useful because the UE 120a will stop the WUS re-transmissions and the power ramping up associated with such re-transmissions resulting in energy savings of the UE 120a and less UL interference in the mobile network 100. Moreover, this provides the base station 110a of the NES cell with greater flexibility in not having to respond immediately to the WUS request from the UE 120a, for instance, due to power saving requirements or other decision-making processing, such as EMF mitigation features.
[0073] The wake-up schemes illustrated in FIGS. 2B to 2E in comparison with the conventional scheme shown in FIG. 2A make use of a new WUS response (RAR) message and a new expected behavior of the UE 120a after the reception of the new RAR message. According to embodiments disclosed herein, the new message may have an OD-SIB1 transmission status and time conditions (defined by one or more time periods T, T1, and or T2 described in more detail in the following) after which the status might change and / or WUS may be re-transmitted. More specifically, as illustrated in step 203 of FIG. 2B, the UE 120a is configured to transmit an Uplink, UL, Wake Up Signal, WUS, (herein also referred to as WUS request) to the base station 110a of the NES. This transmission may be via a PRACH of the mobile network 100. The transmission of the WUS request in step 203 of FIG. 2B may be based on a UL WUS configuration provided in step 201 by the further base station 110b and following a SSB transmission from the base station 110a of the NES cell in step 202 of FIG. 2B. As will be appreciated, the SSB transmission, which is periodic in current NR specifications, from the base station 110a enables the UE 120a to synchronize with the base station 110a and enable the UE 120a to know the best beam to send WUS on to the base station 110a. The beam over which the base station 110a receives the WUS may be used to provide the WUS response or the OD-SIB1. The base station 110a may decide to send the WUS response or the OD-SIB1 on many neighboring beams (SSBs) as well.
[0074] In response to the WUS request, the UE 120a is configured to receive in step 204 of FIG. 2B a WUS response from the NES cell base station 110, wherein the WUS response comprises an indication of a transmission status of an On-Demand, OD, System Information Block 1, SIB1, message from the NES cell base station 110 and wherein the OD-SIB1 message comprises at least a portion of a System Information Block 1. As illustrated in FIG. 2B, the indication of the transmission status of the OD-SIB1 message may, for instance, indicate “broadcast” or “not broadcast” . In an embodiment, the transmission status may be indicated per beam. In other words, in an embodiment, the UE 120a is configured to communicate via a plurality of beams with the base station 110a of the NES cell, and the indication of the transmission status of the OD SIB1 message comprises an indication of the transmission status of the OD SIB1 message of a respective OD SIB1 message on one or more of the plurality of beams.
[0075] In case the transmission status of the OD SIB1 message indicated in the WUS response is, for instance, “not broadcast” , the WUS response may further comprise an indication of one or more time periods T, and / or T1 and / or T2 (some possibilities are indicated in the embodiments shown in FIGS. 2B to 2E) , wherein after the expiry of, for instance, the time period T the UE 120a may send a further UL WUS request to the NES cell base station 110a. In other words, in an embodiment, the WUS response may indicate a time T after which the transmission state indicated in the WUS response takes effect in which case the UE knows whether it can monitor the transmission of the OD-SIB1 message, if status is “broadcast” , or need not to monitor the transmission of the OD-SIB1 message and can (re) send a WUS request , if status is “not broadcast” , which may be also an indication per beam. As will be appreciated, the WUS response may comprise further parameters, such as a preamble ID (as indicated in FIG. 2B) . During the time period T, the UE assumes that no OD-SIB1 transmission is going to take place from the NES cell, Hence, it need not to monitor OD-SIB1 transmissions and should not (re) send an UL WUS request because in this case its useless and even the NES cell might not listen to it.
[0076] According to an embodiment, during the time period T1 (as illustrated, for instance, in FIG. 2C) no WUS TX is expected to happen and an OD-SIB1 transmission is expected (in case of broadcast) , while an OD-SIB1 transmission is not expected in case of no broadcast. In other words. during T1 the Indicated status of OD-SIB1 transmission in WUS response take effects and no change to the status of the OD-SIB1 transmission is expected from the side of the UE 120a. Hence, regardless of whether the status is broadcast or not broadcast, the UE 120a is not required or should not (re) send WUS request. After the expiry of time T1, the UE assume the indicated state in WUS response as invalid meaning it should not assume any think about the transmission state of OD-SIB1. Hence, in this case the UE could (re) send an UL WUS request.
[0077] According to an embodiment, during the time period T2 (as illustrated, for instance, in FIG. 2D) no WUS TX is expected to happen and an OD-SIB1 transmission is expected (in case of broadcast) , while an OD-SIB1 transmission is not expected in case of no broadcast. In other words. during T2 the Indicated status of OD-SIB1 transmission in WUS response take effects and no change to the status of the OD-SIB1 transmission is expected from the side of the UE 120a. Hence, regardless of whether the status is broadcast or not broadcast, the UE 120a is not required or should not (re) send WUS request. After the expiry of time T2, the UE assume the indicated state in WUS response as reversed meaning if it was broadcast before it will become “not broadcast” and if it was “not broadcast” before it will become “broadcast” . If only T2 (no T or no T1) is configured to the UE then the UE knows the state of OD-SIB1 at all time after the reception of WUS response and in this case the UE need not to resend a WUS request.
[0078] In an embodiment the time period T1 is larger or equal to the time period T2 and both are included in the WUS response (as illustrated in FIG. 2E) . For the case that the time period T1 is larger than the time period T2, if the status is “no broadcast” in the WUS response, the UE 120a does not expect to receive OD-SIB1 during T2 and expects to receive it after T2 during T1-T2. If, however, the status is “broadcast” in the WUS response, the UE 120a expects to receive OD-SIB1 during T2 and expects not to receive OD-SIB1 during T1-T2.
[0079] For the case that the time period T1 is equal to the time period T2, the UE 120a should not assume anything about the change of status after time T2. Hence it will resend WUS after time T1.
[0080] In an embodiment, there may be no WUS or no OD-SIB1 transmission for the following cases. If “broadcast” flag is sent then T could be used to mean “no WUS TX during T period” while OD-SIB1 is sent during T. If “not broadcast” then T could be used to mean “No WUS TX and no OD-SIB1 transmission” .
[0081] As illustrated in FIG. 2B, during the time period T indicated in the WUS response no OD-SIB1 transmission will happen nor WUS reception by the NES cell base station 110a. In an embodiment, after the time T the UE 120a expects the OD-SIB1 message to be send with a WUS request. In a further embodiment, the UE may send a new WUS request after the time T.
[0082] In an embodiment, the time period (s) T, T1, and / or T2 may be indicated in term of time slots, frames, seconds, ms, and the like. If any of the time periods T, T1, and / or T2 is higher than the latency between the NES cell base station 110a and the further base station 110b of cell A1, in an embodiment, the NES cell base station 110a may inform the Cell A base station 110b about any of the time periods T, T1, and / or T2 (after which the Cell A base station 110b may include the status of OD-SIB1 transmission in its WUS configurations) .
[0083] In an embodiment, the reference time (i.e. starting time) of any of the time periods T, T1, and / or T2 could be indicated in the context of the respective time period in the WUS response. Alternatively, any of the time periods T, T1, and / or T2 indicated in the WUS response may have predefined, i.e. fixed shift values from a reference time instance known to both the NES cell base station 110a and the UE 120a, e.g., the time instance, when WUS response is sent by the NES cell base station 110a. The fixed shift value (s) may be specified, for example, to have a positive value from the point in time, where the WUS response is sent by the NES cell base station 110a. This positive value may take into consideration, for example, the processing needed by the UE 120a to decode the WUS response message from the NES cell base station 110a. Alternatively, this value may be assumed to be zero from the time instance, when the WUS response is sent by the NES cell base station 110a.
[0084] FIG. 3 shows a flow diagram illustrating steps of a method 300 according to an embodiment for operating the communication apparatus 120a, e.g. the UE 120a, in the mobile network 100. The method 300 comprises a step 301 of transmitting an Uplink, UL, Wake Up Signal, WUS, to the further communication apparatus 110a, e.g. the base station 110a of the NES cell. Moreover, the method 300 comprises a step 303 of receiving a WUS response from the further communication apparatus 110a, e.g. the base station 110a of the NES cell. As already described above, the WUS response comprises an indication of a transmission status of an On-Demand, OD, System Information Block 1, SIB1, message from the further communication apparatus 110a, e.g. the base station 110a of the NES cell, wherein the OD-SIB1 message comprises at least a portion of a System Information Block 1.
[0085] FIG. 4 shows a flow diagram illustrating steps of a method 400 according to an embodiment for operating the communication apparatus 110a, e.g. the base station 110 of a NES cell, in a mobile network 100. The method 400 comprises a step 401 of receiving an Uplink, UL, Wake Up Signal, WUS, from the further communication apparatus 120a, e.g. the UE 120a. Moreover, the method 400 comprises a step 403 of transmitting a WUS response to the further communication apparatus 120a, e.g. the UE 120a, wherein the WUS response comprises an indication of a transmission status of an On-Demand, OD, System Information Block 1, SIB1, message to the further communication apparatus 120a, e.g. the UE 120a, and wherein the OD-SIB1 message comprises at least a portion of a System Information Block 1.
[0086] The person skilled in the art will understand that the "blocks" ( "units" ) of the various figures (method and apparatus) represent or describe functionalities of embodiments of the present disclosure (rather than necessarily individual "units" in hardware or software) and thus describe equally functions or features of apparatus embodiments as well as method embodiments (unit = step) .
[0087] In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other manners. For example, the described embodiment of an apparatus is merely exemplary. For example, the unit division is merely logical function division and may be another division in an actual implementation. For example, a plurality of units or components may be combined or integrated into another system, or some features may be ignored or not performed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections may be implemented by using some interfaces. The indirect couplings or communication connections between the apparatuses or units may be implemented in electronic, mechanical, or other forms.
[0088] The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
[0089] In addition, functional units in the embodiments of the invention may be integrated into one processing unit, or each of the units may exist alone physically, or two or more units are integrated into one unit.
Claims
1.A communication apparatus (120a) for a mobile network (100) , wherein the communication apparatus (120a) is configured to:transmit an Uplink, UL, Wake Up Signal, WUS to a further communication apparatus (110a) ; andreceive a WUS response from the further communication apparatus (110a) , wherein the WUS response comprises an indication of a transmission status of an On-Demand, OD, System Information Block 1, SIB1, message from the further communication apparatus (110a) and wherein the OD-SIB1 message comprises at least a portion of a System Information Block 1.2.The communication apparatus (120a) of claim 1, wherein the communication apparatus (120a) is a User Equipment, UE, (120a) for a Network Energy Saving, NES, cell in the mobile network (100) and wherein the further communication apparatus (110a) is a base station (110a) of the NES cell.3.The communication apparatus (120a) of claim 1 or 2, wherein the indication of the transmission status of the OD SIB1 message is indicative of whether or not the OD SIB1 message is going to be transmitted by the further communication apparatus (110a) .4.The communication apparatus (120a) of any one of the preceding claims, wherein the communication apparatus (120a) is configured to communicate via a plurality of beams with the further communication apparatus (110a) and wherein the indication of the transmission status of the OD SIB1 message comprises an indication of the transmission status of the OD SIB1 message of a respective OD SIB1 message on one or more of the plurality of beams.5.The communication apparatus (120a) of any one of the preceding claims, wherein the WUS response further comprises an indication of a time period (T) during which the communication apparatus (120a) is configured not to monitor the transmission of the OD-SIB1 message and not to send a further UL WUS to the further communication apparatus (110a) and wherein after the expiry of the time period (T) the communication apparatus (120a) is configured to monitor the transmission of the OD-SIB1 message, if the transmission status of the OD SIB1 message is set to broadcast in the WUS response, and not to monitor the transmission of the OD-SIB1 message and configured to send a further UL WUS, if the transmission status of the OD SIB1 message is set to not broadcast in the WUS response.6.The communication apparatus (120a) of any one of the preceding claims, wherein the WUS response further comprises an indication of a time period (T1) during which the communication apparatus (120a) is configured to monitor the transmission of the OD-SIB1 message, if the transmission status of the OD SIB1 message is set to broadcast in the WUS response, and not to monitor the transmission of the OD-SIB1 message, if the transmission status of the OD SIB1 message is set to not broadcast in the WUS response, and wherein after the expiry of the time period (T1) the communication apparatus (120a) is configured to send a further UL WUS to the further communication apparatus (110a) and / or configured to receive the OD-SIB1 message from the further communication apparatus (110a) .7.The communication apparatus (120a) of any one of the preceding claims, wherein the WUS response further comprises an indication of a time period (T2) during which the communication apparatus (120a) is configured to monitor the transmission of the OD-SIB1 message, if the transmission status of the OD SIB1 message is set to broadcast in the WUS response, and not to monitor the transmission of the OD-SIB1 message, if the transmission status of the OD SIB1 message is set to not broadcast in the WUS response and wherein after the expiry of the time period (T2) the communication apparatus (120a) is configured to not to monitor the transmission of the OD-SIB1 message, if the transmission status of the OD SIB1 message is set to broadcast in the WUS response, and to monitor the transmission of the OD-SIB1 message, if the transmission status of the OD SIB1 message is set to not broadcast in the WUS response.8.The communication apparatus (120a) of any one of claims 5 to 7, wherein the communication apparatus (120a) is configured to communicate via a plurality of beams with the further communication apparatus (110a) and wherein the indication of the time period comprises an indication of a respective time period for one or more of the plurality of beams.9.The communication apparatus (120a) of any one of the preceding claims, wherein the communication apparatus (120a) is configured to receive a Random Access Response, RAR, message from the further communication apparatus (120a) and wherein the RAR message comprises the WUS response.10.A method (300) of operating a communication apparatus (120a) in a mobile network (100) , wherein the method (300) comprises:transmitting (301) an Uplink, UL, Wake Up Signal, WUS, [request] to a further communication apparatus (110a) ; andreceiving a WUS response from the further communication apparatus (110a) , wherein the WUS response comprises an indication of a transmission status of an On-Demand, OD, System Information Block 1, SIB1, message from the further communication apparatus (110a) and wherein the OD-SIB1 message comprises at least a portion of a System Information Block 1.11.A communication apparatus (110a) for a mobile network (100) , wherein the communication apparatus (110a) is configured to:receive an Uplink, UL, Wake Up Signal, WUS, [request] from a further communication apparatus (120a) ; andtransmit a WUS response to the further communication apparatus (120a) , wherein the WUS response comprises an indication of a transmission status of an On-Demand, OD, System Information Block 1, SIB1, message to the further communication apparatus (120a) and wherein the OD-SIB1 message comprises at least a portion of a System Information Block 1.12.The communication apparatus (110a) of claim 11, wherein the communication apparatus (110a) is a base station (110a) of a Network Energy Saving, NES, cell of the mobile network (100) and wherein the further communication apparatus (120a) is a User Equipment, UE, (120a) for the NES cell in the mobile network (100) .13.The communication apparatus (110a) of claim 11 or 12, wherein the indication of the transmission status of the OD SIB1 message is indicative of whether or not the OD SIB1 message is going to be transmitted [i.e. broadcast] by the communication apparatus (110a) .14.The communication apparatus (110a) of any one of claims 11 to 13, wherein the communication apparatus (110a) is configured to communicate via a plurality of beams with the further communication apparatus (120a) and wherein the indication of the transmission status of the OD SIB1 message comprises an indication of the transmission status of the OD SIB1 message of a respective OD SIB1 message on one or more of the plurality of beams.15.The communication apparatus (110a) of any one of claims 11 to 14, wherein the WUS response further comprises an indication of a time period (T) during which the further communication apparatus (120a) is configured not to monitor the transmission of the OD-SIB1 message and not to send a further UL WUS to the communication apparatus (110a) and wherein after the expiry of the time period (T) the further communication apparatus (120a) is configured to monitor the transmission of the OD-SIB1 message, if the transmission status of the OD SIB1 message is set to broadcast in the WUS response, and not to monitor the transmission of the OD-SIB1 message and configured to send a further UL WUS, if the transmission status of the OD SIB1 message is set to not broadcast in the WUS response.16.The communication apparatus (110a) of any one of claims 11 to 15, wherein the WUS response further comprises an indication of a time period (T1) during which the further communication apparatus (120a) is configured to monitor the transmission of the OD-SIB1 message, if the transmission status of the OD SIB1 message is set to broadcast in the WUS response, and not to monitor the transmission of the OD-SIB1 message, if the transmission status of the OD SIB1 message is set to not broadcast in the WUS response, and wherein after the expiry of the time period (T1) the further communication apparatus (120a) is configured to send a further UL WUS to the communication apparatus (110a) and / or configured to receive the OD-SIB1 message from the communication apparatus (110a) .17.The communication apparatus (110a) of any one of claims 11 to 16, wherein the WUS response further comprises an indication of a time period (T2) during which the further communication apparatus (120a) is configured to monitor the transmission of the OD-SIB1 message, if the transmission status of the OD SIB1 message is set to broadcast in the WUS response, and not to monitor the transmission of the OD-SIB1 message, if the transmission status of the OD SIB1 message is set to not broadcast in the WUS response, and wherein after the expiry of the time period (T2) the further communication apparatus (120a) is configured to not to monitor the transmission of the OD-SIB1 message, if the transmission status of the OD SIB1 message is set to broadcast in the WUS response, and to monitor the transmission of the OD-SIB1 message, if the transmission status of the OD SIB1 message is set to not broadcast in the WUS response.18.The communication apparatus (110a) of any one of claims 15 to 17, wherein the communication apparatus (110a) is configured to communicate via a plurality of beams with the further communication apparatus (120a) and wherein the indication of the time period comprises an indication of a respective time period for one or more of the plurality of beams.19.The communication apparatus (110a) of any one of claims 11 to 18, wherein the communication apparatus (110a) is configured to transmit a Random Access Response, RAR, message to the further communication apparatus (120a) and wherein the RAR message comprises the WUS response.20.A method (400) of operating a communication apparatus (110a) in a mobile network (100) , wherein the method (400) comprises:receiving (401) an Uplink, UL, Wake Up Signal, WUS, [request] from a further communication apparatus (120a) ; andtransmitting a WUS response to the further communication apparatus (120a) , wherein the WUS response comprises an indication of a transmission status of an On-Demand, OD, System Information Block 1, SIB1, message to the further communication apparatus (120a) and wherein the OD-SIB1 message comprises at least a portion of a System Information Block 1.21.A computer program product comprising a computer-readable storage medium for storing program code which causes a computer or a processor to perform the method (300) of claim 10 or the method (400) of claim 20 when the program code is executed by the computer or the processor.