Apparatus and method of wireless communication
By enabling UE to request system information on demand, the method reduces network power consumption and ensures reliable communication performance and mobility in wireless networks.
Patent Information
- Application Number
- PCT/CN2024/110999
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-08-09
- Publication Date
- 2026-02-12
Smart Images

Figure CN2024110999_12022026_PF_FP_ABST
Abstract
Description
APPARATUS AND METHOD OF WIRELESS COMMUNICATION
[0001] BACKGROUND OF DISCLOSURE
[0002] 1. Field of the Disclosure
[0003] The present disclosure relates to the field of communication systems, and more particularly, to an apparatus and a method of wireless communication, which can reduce energy consumption of base station.
[0004] 2. Description of the Related Art
[0005] Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power) . Examples of such multiple-access systems include fourth generation (4G) systems such as long term evolution (LTE) systems, LTE-advanced (LTE-A) systems, or LTE-A pro systems, and fifth generation (5G) systems which may be referred to as new radio (NR) systems. These systems may employ technologies such as code division multiple access (CDMA) , time division multiple access (TDMA) , frequency division multiple access (FDMA) , orthogonal frequency division multiple access (OFDMA) , or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM) . A wireless multiple-access communications system may include a number of base stations or network access nodes, each simultaneously supporting communication for multiple communication devices, which may be otherwise known as user equipment (UE) .
[0006] In legacy communication systems, the base station periodically transmits system information, this is crucial for idle terminal devices to access the network. But at the same time, the network cannot predict the number of the idle terminal devices who would potentially need to read the system information. Therefore, it is naturally that some of the periodically transmitted system information is wasted. Moreover, as the network has to maintain the system information, the base station cannot go to a deep sleep mode to save the power. According to the operators’ billing record the OPEX due to the electricity consummation shares a big part of the bill cost. Thus, if the energy consumption of the base station can be reduced, not only is it helpful to operating future cellular system such as sixth generation (6G) system, but also contribute to ecology, striving to reduce the carbon release, being helpful to slow-down the global warming. However, if the base station directly omits the system information, it would prevent the idle UE from accessing the cell, which makes the cell non-cell-defined. Thus, an ideal way is to optimize the transmission for future cellular system e.g., only transmit the system information when it is needed.
[0007] Therefore, there is a need to develop an apparatus (such as a UE and / or a base station) and a method of wireless communication, which can reduce the network power consumption.SUMMARY
[0008] An object of the present disclosure is to propose an apparatus (such as a user equipment (UE) and / or a base station) and a method of wireless communication, which can reduce network energy consumption, ensure good mobility requirement from UE, provide a good communication performance, and / or provide a high reliability.
[0009] In a first aspect of the present disclosure, provided is a wireless communication method by a user equipment (UE) , which is capable of communicating with a base station in a network. The method includes transmitting, by the UE, a trigger signal to a base station to request system information; and monitoring the system information after transmitting the trigger signal.
[0010] In a second aspect of the present disclosure, provided is a wireless communication method by a base station, which is capable of communicating with a user equipment (UE) in a network. The method includes receiving, from the UE, a trigger signal for requesting system information; and broadcasting the system information after receiving the trigger signal.
[0011] In some embodiments of any one of the above methods, the UE monitors the system information without waiting for a feedback signal from the network.
[0012] In some embodiments of any one of the above methods, the method further includes receiving by the UE from the network, a feedback signal in response to the trigger signal, wherein the UE monitors the system information after the feedback signal is received from the network. The method further includes transmitting by the base station to the UE a feedback signal in response to the trigger signal, wherein the system information is broadcast after transmitting the feedback signal.
[0013] In some embodiments of any one of the above methods, the trigger signal is a preamble or physical random access channel (PRACH) .
[0014] In some embodiments of any one of the above methods, a location of a resource for the UE to transmit the trigger signal is a PRACH occasion.
[0015] In some embodiments of any one of the above methods, one or more PRACH occasions are configured for transmitting the trigger signal.
[0016] In some embodiments of any one of the above methods, one or more synchronization signal / physical broadcast channel (PBCH) block (SSB) indexes are associated with one PRACH occasion, or one SSB index is associated with one or more PRACH occasions.
[0017] In some embodiments of any one of the above methods, the trigger signal triggers a SSB index corresponding to a PRACH occasion where the UE transmits the trigger signal.
[0018] In some embodiments of any one of the above methods, the monitoring the system information includes monitoring by the UE in a search space corresponding to the SSB index.
[0019] In some embodiments of any one of the above methods, one or more preambles are associated with one or more SSB indexes.
[0020] In some embodiments of any one of the above methods, in one PRACH occasion, a first preamble is associated with a first SSB index, and a second preamble is associated a second SSB index.
[0021] In some embodiments of any one of the above methods, the feedback signal is a downlink control information (DCI) carried in a physical downlink control channel (PDCCH) or a media access control (MAC) header or MAC control element (MAC-CE) or radio resource control (RRC) in a physical downlink share channel (PDSCH) .
[0022] In some embodiments of any one of the above methods, the feedback signal includes one or more indication, and the one or more indication indicates at least one of the followings: a first information relevant to periodicity that the UE monitors the system information; a second information relevant to a starting location where the UE starts to monitor the system information; a third information relevant to an ending location until where the UE monitors the system information.
[0023] In some embodiments of any one of the above methods, the first information indicates one of a plurality of candidate periodicities.
[0024] In some embodiments of any one of the above methods, the first information includes a repetition parameter, when the repetition parameter indicates a first value, system information monitoring is repeated with a first periodicity within a second periodicity; when the repetition parameter indicates a second value, the second periodicity is the periodicity for system information monitoring without repetition within the second periodicity.
[0025] In some embodiments of any one of the above methods, when the repetition parameter indicates the first value, the system information repeated with the first periodicity is for joint decoding; when the repetition parameter indicates the second value, the system information is not for joint decoding.
[0026] In some embodiments of any one of the above methods, the second information includes an offset with respect to the location of the feedback signal.
[0027] In some embodiments of any one of the above methods, the second information includes an offset with respect to the location of the trigger signal.
[0028] In some embodiments of any one of the above methods, the method further includes determining by the UE, based on the offset, the starting location where the UE starts to monitor the system information. the method further includes indicating by the base station a first offset to a first UE in the feedback signal for the first UE and indicating a second offset to a second UE in the feedback signal for the second UE to sync up the first UE and the second UE to monitor the system information.
[0029] In some embodiments of any one of the above methods, the method further includes determining by the UE a time interval or time window based on the second information and the third information, wherein system information monitoring is performed in the time window, and stops when the time window ends. That is, the second information and the third information are used for determining a time interval or time window for monitoring the system information.
[0030] In some embodiments of any one of the above methods, the third information indicates a time duration, and the time window is determined by the starting location of the second information and the time duration.
[0031] In some embodiments of any one of the above methods, the method further includes receiving by the UE from a first cell a configuration of resource of the trigger signal of a second cell.
[0032] In some embodiments of any one of the above methods, the method further includes (the UE) being informed by the second cell that the configuration of resource of the trigger signal of the second cell is changed when the UE accesses to the second cell or camps on the second cell. Correspondingly, the base station informs the UE that a configuration of resource of the trigger signal is changed.
[0033] In some embodiments of any one of the above methods, the method further includes the being informed by the second cell that the configuration of resource of the trigger signal of the second cell is changed includes receiving by the UE from the second cell a paging message indicating that the configuration is changed. Correspondingly, the base station transmits to the UE a paging message indicating that the configuration is changed.
[0034] In some embodiments of any one of the above methods, the paging message carries an updated configuration of resource of the trigger signal of the second cell.
[0035] In some embodiments of any one of the above methods, the method further includes moving to the first cell to get an updated configuration of resource of the trigger signal of the second cell after being informed by the second cell that the configuration is changed. Correspondingly, the base station provides an updated configuration of resource of the trigger signal to another base station for the UE to get the updated configuration when the UE accesses to or camps on the another base station.
[0036] In a third aspect of the present disclosure, a user equipment includes a memory, a transceiver, and a processor coupled to the memory and the transceiver. The processor is configured to perform the above method.
[0037] In a fourth aspect of the present disclosure, a base station includes a memory, a transceiver, and a processor coupled to the memory and the transceiver. The processor is configured to perform the above method.
[0038] In a fifth aspect of the present disclosure, a non-transitory machine-readable storage medium has stored thereon instructions that, when executed by a computer, cause the computer to perform the above method.
[0039] In a sixth aspect of the present disclosure, a chip includes a processor, configured to call and run a computer program stored in a memory, to cause a device in which the chip is installed to execute the above method.
[0040] In a seventh aspect of the present disclosure, a computer readable storage medium, in which a computer program is stored, causes a computer to execute the above method.
[0041] In an eighth aspect of the present disclosure, a computer program product includes a computer program, and the computer program causes a computer to execute the above method.
[0042] In a ninth aspect of the present disclosure, a computer program causes a computer to execute the above method.BRIEF DESCRIPTION OF DRAWINGS
[0043] In order to illustrate the embodiments of the present disclosure or related art more clearly, the following figures will be described in the embodiments are briefly introduced. It is obvious that the drawings are merely some embodiments of the present disclosure, a person having ordinary skill in this field can obtain other figures according to these figures without paying the premise.
[0044] FIG. 1 is a block diagram of one or more user equipments (UEs) and a base station (e.g., gNB) of communication in a communication network system according to an embodiment of the present disclosure.
[0045] FIG. 2 is a flowchart of a method of wireless communication performed by a user equipment (UE) according to an embodiment of the present disclosure.
[0046] FIG. 3 is a flowchart of a method of wireless communication performed by a base station according to an embodiment of the present disclosure.
[0047] FIG. 4 is a schematic diagram illustrating a procedure to request system information according to an embodiment of the present disclosure.
[0048] FIG. 5 is a schematic diagram illustrating an example of system information monitoring periodicity according to an embodiment of the present disclosure.
[0049] FIG. 6 is a schematic diagram illustrating an example of synchronizing up different UEs to monitor system information according to an embodiment of the present disclosure.
[0050] FIG. 7 is a schematic diagram illustrating an example of monitoring system information in a time window according to an embodiment of the present disclosure.
[0051] FIG. 8 is a block diagram of a wireless communication device according to an embodiment of the present disclosure.
[0052] FIG. 9 is a block diagram of a wireless communication device according to an embodiment of the present disclosure.
[0053] FIG. 10 is a block diagram of a system for wireless communication according to an embodiment of the present disclosure.DETAILED DESCRIPTION OF EMBODIMENTS
[0054] Embodiments of the present disclosure are described in detail with the technical matters, structural features, achieved objects, and effects with reference to the accompanying drawings as follows. Specifically, the terminologies in the embodiments of the present disclosure are merely for describing the purpose of the certain embodiment, but not to limit the disclosure.
[0055] In this document, the term " / " should be interpreted to indicate "and / or. " A combination such as “at least one of A, B, or C, ” “one or more of A, B, or C, ” “at least one of A, B, and C, ” “one or more of A, B, and C, ” or “A, B, and / or C” may be A only, B only, C only, A and B, A and 30 C, B and C, or A and B and C, where any combination may contain one or more members of A, B, or C.
[0056] In this disclosure, a method is proposed to allow an idle or inactive UE to request system information when it is needed and the base station can decide to transmit the system information based on UE’s request. Specifically, the network does not systematically transmit system information, e.g. system information block 1 (SIB1) . But the UE triggers the network to transmit the system information. Therefore, if there is no triggering from UE, the network can save the power by avoiding system information transmission. From the UE perspective, after sending the trigger signal, the UE will start to monitor the system information either after receiving a feedback from the network, or without waiting for network feedback.
[0057] FIG. 1 illustrates that, in some embodiments, one or more user equipments (UEs) 10 and a base station (e.g., gNB) 20 for transmission adjustment in a communication network system 30 according to an embodiment of the present disclosure are provided. The communication network system 30 includes the one or more UEs 10 and the base station 20. The one or more UEs 10 may include a memory 12, a transceiver 13, and a processor 11 coupled to the memory 12 and the transceiver 13. The base station 20 may include a memory 22, a transceiver 23, and a processor 21 coupled to the memory 22 and the transceiver 23. The processor 11 or 21 may be configured to implement proposed functions, procedures and / or methods described in this description. Layers of radio interface protocol may be implemented in the processor 11 or 21. The memory 12 or 22 is operatively coupled with the processor 11 or 21 and stores a variety of information to operate the processor 11 or 21. The transceiver 13 or 23 is operatively coupled with the processor 11 or 21, and the transceiver 13 or 23 transmits and / or receives a radio signal.
[0058] The processor 11 or 21 may include application-specific integrated circuit (ASIC) , other chipset, logic circuit and / or data processing device. The memory 12 or 22 may include read-only memory (ROM) , random access memory (RAM) , flash memory, memory card, storage medium and / or other storage device. The transceiver 13 or 23 may include baseband circuitry to process radio frequency signals. When the embodiments are implemented in software, the techniques described herein can be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described herein. The modules can be stored in the memory 12 or 22 and executed by the processor 11 or 21. The memory 12 or 22 can be implemented within the processor 11 or 21 or external to the processor 11 or 21 in which case those can be communicatively coupled to the processor 11 or 21 via various means as is known in the art.
[0059] In some embodiments, the processor 11 is configured to transmit a trigger signal (or called a request signal or an on-demand (OD) signal) to a base station to request system information and monitor the system information after transmitting the trigger signal. The UE may monitor the system information after receiving from the network a feedback signal (or called a response signal) in response to the trigger signal, or the UE may monitor the system information without waiting for a feedback signal from the network. This can reduce network energy consumption and / or ensure good mobility requirement from UE.
[0060] In some embodiments, the processor 21 is configured to receive, from the UE, a trigger signal (or called a request signal or an on-demand (OD) signal) for requesting system information and broadcast the system information after receiving the trigger signal. The base station may transmit to the UE a feedback signal (or called a response signal) in response to the trigger signal and then broadcast the system information after transmitting the feedback signal, or the base station may configure the UE to monitor the system information without waiting for a feedback signal from the network. This can reduce network energy consumption and / or ensure good mobility requirement from UE.
[0061] FIG. 2 illustrates a method 100 of wireless communication by a UE according to an embodiment of the present disclosure. In some embodiments, referring to FIGs. 2 and 4, the method 100 includes: a block 102, transmitting, by the UE, a trigger signal (or called a request signal or an on-demand (OD) signal) to a base station to request system information (see also Step a in FIG. 4) ; and a block 106, monitoring the system information after transmitting the trigger signal (see also Step d in FIG. 4) . Optionally, the method 100 may further include a block 104, receiving from the network, a feedback signal (or called a response signal) in response to the trigger signal (see also Step b in FIG. 4) . That is, the UE may monitor the system information after receiving the feedback signal, or the UE may monitor the system information without waiting for the feedback signal. This can reduce network energy consumption and / or ensure good mobility requirement from UE.
[0062] FIG. 3 illustrates a method 200 of wireless communication by a base station according to an embodiment of the present disclosure. In some embodiments, referring to FIGs. 3 and 4, the method 200 includes: a block 202, receiving, from the UE, a trigger signal (or called a request signal or an on-demand (OD) signal) for requesting system information (see also Step a in FIG. 4) ; and a block 206, broadcasting the system information after receiving the trigger signal (see also Step c in FIG. 4) . Optionally, the method 200 may further include a block 204, transmitting to the UE a feedback signal (or called a response signal) in response to the trigger signal (see also Step b in FIG. 4) . That is, the base station may transmit to the UE the feedback signal and then broadcast the system information after transmitting the feedback signal, or the base station may configure the UE to monitor the system information without waiting for the feedback signal. This can reduce network energy consumption and / or ensure good mobility requirement from UE.
[0063] Example:
[0064] In some examples, the trigger signal may be a preamble or physical random access channel (PRACH) , and the location of the resource for the UE to transmit the trigger signal may be a PRACH occasion. The feedback signal may be a downlink control information (DCI) carried in a physical downlink control channel (PDCCH) or a media access control (MAC) header or MAC control element (MAC-CE) or radio resource control (RRC) in a physical downlink share channel (PDSCH) .
[0065] In some examples, the trigger signal / on-demand signal is transmitted in a PRACH occasion using a PRACH preamble. One or more PRACH occasions are configured for transmitting the trigger signal / on-demand signal. In some examples, the one or more PRACH occasions are associated with synchronization signal / physical broadcast channel (PBCH) block (SSB) indexes. Specifically, one or more SSB indexes are associated with one PRACH occasion, or one SSB index is associated with one or more PRACH occasions. Once the UE transmits an OD signal in a PRACH occasion, the OD signal is also associated with the corresponding SSB index. That is, the trigger signal triggers a SSB index corresponding to a PRACH occasion where the UE transmits the trigger signal. Later, when the UE monitors physical downlink control channel (PDCCH) in the type0 PDCCH search space, the UE will monitor in the search space corresponding to the SSB index. It should be noted that a system information block carries system information, and the SSB index indicates an index of the system information block.
[0066] In some other examples, within a PRACH occasion, there are one or more preambles to be used for OD signal transmission, the one or more preambles are associated with one or more SSB indexes. For example, in a PRACH occasion, there is a first preamble and a second preamble, the first preamble is associated with a first SSB index, and the second preamble is associated the second SSB index. The advantage is that mapping SSB index with preambles can make the PRACH occasion more efficient. As the OD signal does not need to differentiate different UEs, preamble diversity can be used to map different SSB indexes, so that the number of PRACH occasions can be reduced.
[0067] In some examples, the network may provide one or more indication in the feedback signal. The one or more indication indicates at least one of the followings: 1) a first information relevant to UE monitoring system information periodicity (i.e., periodicity that the UE monitors the system information) ; 2) a second information relevant to a starting location where UE starts to monitoring the system information; 3) a third information relevant to an ending location until where the UE monitors the system information.
[0068] In some examples, the first information provided in the feedback signal may indicate one of a plurality of candidate periodicities. After receiving the trigger signal or OD signal from the UE, the network may decide to transmit system information with large periodicity to allow the network to save power. In this case, the network can provide the first information to the UE about the system information periodicity or equivalently a system information monitoring periodicity. The candidate periodicity value can be 5, 10, 20, 40, 60, 80, 160 ms. For example, when the first information indicates 20 ms, the UE may monitor the system information at 20 ms periodicity. The larger periodicity gives more power saving gain to the network, but it increases the UE accessing latency. As shown in FIG. 5, the network may provide in the feedback signal a monitoring period 1 with small periodicity for the UE to monitor the system information more frequently, or the network may provide in the feedback signal a monitoring period 2 with large periodicity for the UE to monitor the system information less frequently.
[0069] In some examples, in addition to the system information monitoring periodicity, the first information may further include a repetition parameter. In some cases, when the repetition parameter indicates a first value (e.g., 1) , which may indicate the repetition is switched on, system information monitoring is repeated with a first periodicity within a second periodicity (that is, the first periodicity is smaller than the second periodicity) ; when the repetition parameter indicates a second value (e.g., 0) , which may indicate the repetition is switched off, the second periodicity is the periodicity for system information monitoring without repetition within the second periodicity (that is, the UE monitors the system information with the second periodicity) . It is noted that the number of times of the system information monitoring repeated with the first periodicity may be predefined or configured by the network. It is also noted that the repeated system information monitoring may not occupy all the period within the second periodicity. In some cases, when the repetition parameter indicates the first value (e.g., 1) , the system information repeated with the first periodicity is for joint decoding in order to increase coverage; when the repetition parameter indicates the second value (e.g., 0) , the system information is not for joint decoding.
[0070] In some examples, the network may receive trigger signals or OD signals from more than one UE, and since the system information is broadcasting, therefore, the network may prefer to sync up different UEs to monitor the system information in a localized time interval, so that the broadcasted system information can be received by multiple UEs. Thus, the network can only transmit the system information within a short time interval. To realize this, the network can provide the second information to the UE relevant to the starting location where the UE starts to monitor the system information. The second information may include an offset with respect to the location of the feedback signal or with respect to the location of the trigger signal. For example, the network may provide an offset in the feedback signal and the UE may determine the starting location based on the location of the feedback signal (or the location of the trigger signal) and the offset. When UE1 sends a trigger signal to the network, and gets a feedback with an indication for offset 1 and UE2 sends a trigger signal to the network and then gets a feedback with an indication for offset 2. Even these two UEs sending the trigger signal at different time, the network can still indicate proper values of offset, respectively to the UEs to align the starting location of the monitoring system information. As shown in FIG. 6, the network indicates a first offset (e.g., offset 1) to UE1 in a feedback signal for UE1 and indicates a second offset (e.g., offset 2) to UE2 in a feedback signal for UE2 to sync up UE1 and UE2 to monitor the system information within a time interval or time window.
[0071] In some examples, the network may not transmit system information during a long time. In practice, the network may prefer to inform the UE that the system information is only transmitted in a time interval or in a time window. Thus, the network may provide the third information to the UE about the ending location. The UE may determine the time interval or time window based on the second and the third information. For example, the network may indicate a time duration and the UE determines the time interval from the starting location and the time duration. The UE may monitor the system information in the time window or time interval. When the time window ends, the UE stops monitoring system information. If the UE still needs to read the system information, the UE may re-send the trigger signal to the network. As shown in FIG. 7, the UE only monitors a search space for the system information within the time window.
[0072] In some examples, a first cell may communicate with a second cell about the configuration of resource of the trigger signal. When the UE accesses to the first cell or camps on the first cell, the first cell may provide the configuration of the resource of the trigger signal of the second cell to a UE for the UE to get system information broadcast by the second cell. When the UE accesses to the second cell or camps on the second cell, this configuration (i.e., the configuration of resource of the trigger signal of the second cell) may be changed. Once the configuration changes, the second cell may inform the UE that the configuration is changed. To realize that the second cell may send a paging message to the UE and in the paging message, it indicates that the configuration is changed. The paging message may carry an updated configuration of resource of the trigger signal of the second cell. Alternatively, the UE may move to the first cell to get the updated configuration after being informed by the second cell that the configuration is changed. The second cell can communicate with the first cell to provide the updated configuration to the first cell.
[0073] FIG. 8 illustrates a wireless communication device 1000 according to an embodiment of the present disclosure. The wireless communication device 1000 includes a trigger signal transmitting part 1001 configured to transmit a trigger signal to a base station to request system information; and a monitoring part 1003 configured to monitor the system information after transmitting the trigger signal. Optionally, the wireless communication device 1000 may further include a feedback signal receiving part 1002 configured to receive from the network, a feedback signal in response to the trigger signal. That is, the UE may monitor the system information after receiving the feedback signal, or the UE may monitor the system information without waiting for the feedback signal. This can reduce network energy consumption and / or ensure good mobility requirement from UE. This can reduce network energy consumption, ensure good cell coverage and / or ensure good mobility requirement from UE.
[0074] FIG. 9 illustrates a wireless communication device 1100 according to an embodiment of the present disclosure. The wireless communication device 1100 includes a trigger signal receiving part 1101 configured to receive, from the UE, a trigger signal for requesting system information; and a broadcasting part 1103 configured to broadcast the system information after receiving the trigger signal. Optionally, the wireless communication device 1100 may further include a feedback signal transmitting part 1102 configured to transmit to the UE a feedback signal in response to the trigger signal. That is, the base station may transmit to the UE the feedback signal and then broadcast the system information after transmitting the feedback signal, or the base station may configure the UE to monitor the system information without waiting for the feedback signal. This can reduce network energy consumption and / or ensure good mobility requirement from UE.
[0075] In some embodiments, the method further includes receiving by the UE from the network, a feedback signal in response to the trigger signal, wherein the UE monitors the system information after the feedback signal is received from the network. In some embodiments, the method further includes transmitting by the base station to the UE a feedback signal in response to the trigger signal, wherein the system information is broadcast after transmitting the feedback signal. In some embodiments, the UE monitors the system information without waiting for a feedback signal from the network. In some embodiments, the feedback signal includes one or more indication, and the one or more indication indicates at least one of the followings: a first information relevant to periodicity that the UE monitors the system information; a second information relevant to a starting location where the UE starts to monitor the system information; a third information relevant to an ending location until where the UE monitors the system information.
[0076] In some embodiments, the trigger signal is a preamble or physical random access channel (PRACH) . In some embodiments, a location of a resource for the UE to transmit the trigger signal is a PRACH occasion. In some embodiments, one or more PRACH occasions are configured for transmitting the trigger signal. In some embodiments, one or more synchronization signal / physical broadcast channel (PBCH) block (SSB) indexes are associated with one PRACH occasion, or one SSB index is associated with one or more PRACH occasions. In some embodiments, the trigger signal triggers a SSB index corresponding to a PRACH occasion where the UE transmits the trigger signal. In some embodiments, the monitoring the system information includes monitoring by the UE in a search space corresponding to the SSB index. In some embodiments, one or more preambles are associated with one or more SSB indexes. In some embodiments, in one PRACH occasion, a first preamble is associated with a first SSB index, and a second preamble is associated a second SSB index. In some embodiments, the feedback signal is a downlink control information (DCI) carried in a physical downlink control channel (PDCCH) or a media access control (MAC) header or MAC control element (MAC-CE) or radio resource control (RRC) in a physical downlink share channel (PDSCH) .
[0077] In some embodiments, the first information indicates one of a plurality of candidate periodicities. In some embodiments, the first information includes a repetition parameter, when the repetition parameter indicates a first value, system information monitoring is repeated with a first periodicity within a second periodicity; when the repetition parameter indicates a second value, the second periodicity is the periodicity for system information monitoring without repetition within the second periodicity. In some embodiments, when the repetition parameter indicates the first value, the system information repeated with the first periodicity is for joint decoding; when the repetition parameter indicates the second value, the system information is not for joint decoding.
[0078] In some embodiments, the second information includes an offset with respect to the location of the feedback signal. In some embodiments, the second information includes an offset with respect to the location of the trigger signal. In some embodiments, the method further includes determining by the UE, based on the offset, the starting location where the UE starts to monitor the system information. In some embodiments, the method further includes indicating by the base station a first offset to a first UE in the feedback signal for the first UE and indicating a second offset to a second UE in the feedback signal for the second UE to sync up the first UE and the second UE to monitor the system information.
[0079] In some embodiments, the method further includes determining by the UE a time interval or time window based on the second information and the third information, wherein system information monitoring is performed in the time window, and stops when the time window ends. That is, the second information and the third information are used for determining a time interval or time window for monitoring the system information. In some embodiments, the third information indicates a time duration, and the time window is determined by the starting location of the second information and the time duration.
[0080] In some embodiments, the method further includes receiving by the UE from a first cell a configuration of resource of the trigger signal of a second cell. In some embodiments, the method further includes (the UE) being informed by the second cell that the configuration of resource of the trigger signal of the second cell is changed when the UE accesses to the second cell or camps on the second cell. Correspondingly, the base station informs the UE that a configuration of resource of the trigger signal is changed. In some embodiments, the method further includes the being informed by the second cell that the configuration of resource of the trigger signal of the second cell is changed includes receiving by the UE from the second cell a paging message indicating that the configuration is changed. Correspondingly, the base station transmits to the UE a paging message indicating that the configuration is changed. In some embodiments, the paging message carries an updated configuration of resource of the trigger signal of the second cell. In some embodiments, the method further includes moving to the first cell to get an updated configuration of resource of the trigger signal of the second cell after being informed by the second cell that the configuration is changed. Correspondingly, the base station provides an updated configuration of resource of the trigger signal to another base station for the UE to get the updated configuration when the UE accesses to or camps on the another base station.
[0081] Commercial interests for some embodiments are as follows. 1. Reducing network energy consumption. 2. Ensuring good mobility requirement from UE. 3. Providing a good communication performance. 4. Providing a high reliability. 5. Some embodiments of the present disclosure are used by 5G-NR chipset vendors, V2X communication system development vendors, automakers including cars, trains, trucks, buses, bicycles, moto-bikes, helmets, and etc., drones (unmanned aerial vehicles) , smartphone makers, communication devices for public safety use, AR / VR device maker for example gaming, conference / seminar, education purposes. Some embodiments of the present disclosure are a combination of “techniques / processes” that can be adopted in 3GPP specification to create an end product. Some embodiments of the present disclosure could be adopted in 5G NR licensed and non-licensed or shared spectrum communications. Some embodiments of the present disclosure propose technical mechanisms.
[0082] FIG. 10 is a block diagram of an example system 700 for wireless communication according to an embodiment of the present disclosure. Embodiments described herein may be implemented into the system using any suitably configured hardware and / or software. FIG. 10 illustrates the system 700 including a radio frequency (RF) circuitry 710, a baseband circuitry 720, an application circuitry 730, a memory / storage 740, a display 750, a camera 760, a sensor 770, and an input / output (I / O) interface 780, coupled with each other at least as illustrated. The application circuitry 730 may include a circuitry such as, but not limited to, one or more single-core or multi-core processors. The processors may include any combination of general-purpose processors and dedicated processors, such as graphics processors, application processors. The processors may be coupled with the memory / storage and configured to execute instructions stored in the memory / storage to enable various applications and / or operating systems running on the system.
[0083] The baseband circuitry 720 may include circuitry such as, but not limited to, one or more single-core or multi-core processors. The processors may include a baseband processor. The baseband circuitry may handle various radio control functions that enables communication with one or more radio networks via the RF circuitry. The radio control functions may include, but are not limited to, signal modulation, encoding, decoding, radio frequency shifting, etc. In some embodiments, the baseband circuitry may provide for communication compatible with one or more radio technologies. For example, in some embodiments, the baseband circuitry may support communication with an evolved universal terrestrial radio access network (EUTRAN) and / or other wireless metropolitan area networks (WMAN) , a wireless local area network (WLAN) , a wireless personal area network (WPAN) . Embodiments in which the baseband circuitry is configured to support radio communications of more than one wireless protocol may be referred to as multi-mode baseband circuitry.
[0084] In various embodiments, the baseband circuitry 720 may include circuitry to operate with signals that are not strictly considered as being in a baseband frequency. For example, in some embodiments, baseband circuitry may include circuitry to operate with signals having an intermediate frequency, which is between a baseband frequency and a radio frequency. The RF circuitry 710 may enable communication with wireless networks using modulated electromagnetic radiation through a non-solid medium. In various embodiments, the RF circuitry may include switches, filters, amplifiers, etc. to facilitate the communication with the wireless network. In various embodiments, the RF circuitry 710 may include circuitry to operate with signals that are not strictly considered as being in a radio frequency. For example, in some embodiments, RF circuitry may include circuitry to operate with signals having an intermediate frequency, which is between a baseband frequency and a radio frequency.
[0085] In various embodiments, the transmitter circuitry, control circuitry, or receiver circuitry discussed above with respect to the user equipment, eNB, or gNB may be embodied in whole or in part in one or more of the RF circuitry, the baseband circuitry, and / or the application circuitry. As used herein, “circuitry” may refer to, be part of, or include an Application Specific Integrated Circuit (ASIC) , an electronic circuit, a processor (shared, dedicated, or group) , and / or a memory (shared, dedicated, or group) that execute one or more software or firmware programs, a combinational logic circuit, and / or other suitable hardware components that provide the described functionality. In some embodiments, the electronic device circuitry may be implemented in, or functions associated with the circuitry may be implemented by, one or more software or firmware modules. In some embodiments, some or all of the constituent components of the baseband circuitry, the application circuitry, and / or the memory / storage may be implemented together on a system on a chip (SOC) . The memory / storage 740 may be used to load and store data and / or instructions, for example, for a system. The memory / storage for one embodiment may include any combination of suitable volatile memory, such as dynamic random access memory (DRAM) , and / or non-volatile memory, such as flash memory.
[0086] In various embodiments, the I / O interface 780 may include one or more user interfaces designed to enable user interaction with the system and / or peripheral component interfaces designed to enable peripheral component interaction with the system. User interfaces may include, but are not limited to a physical keyboard or keypad, a touchpad, a speaker, a microphone, etc. Peripheral component interfaces may include, but are not limited to, a non-volatile memory port, a universal serial bus (USB) port, an audio jack, and a power supply interface. In various embodiments, the sensor 770 may include one or more sensing devices to determine environmental conditions and / or location information related to the system. In some embodiments, the sensors may include, but are not limited to, a gyro sensor, an accelerometer, a proximity sensor, an ambient light sensor, and a positioning unit. The positioning unit may also be part of, or interact with, the baseband circuitry and / or RF circuitry to communicate with components of a positioning network, e.g., a global positioning system (GPS) satellite.
[0087] In various embodiments, the display 750 may include a display, such as a liquid crystal display and a touch screen display. In various embodiments, the system 700 may be a mobile computing device such as, but not limited to, a laptop computing device, a tablet computing device, a netbook, an ultrabook, a smartphone, an AR / VR glasses, etc. In various embodiments, a system may have more or less components, and / or different architectures. Where appropriate, methods described herein may be implemented as a computer program. The computer program may be stored on a storage medium, such as a non-transitory storage medium.
[0088] A person having ordinary skill in the art understands that each of the units, algorithm, and steps described and disclosed in the embodiments of the present disclosure are realized using electronic hardware or combinations of software for computers and electronic hardware. Whether the functions run in hardware or software depends on the condition of application and design requirement for a technical plan. A person having ordinary skill in the art can use different ways to realize the function for each specific application while such realizations should not go beyond the scope of the present disclosure. It is understood by a person having ordinary skill in the art that he / she can refer to the working processes of the system, device, and unit in the above-mentioned embodiment since the working processes of the above-mentioned system, device, and unit are basically the same. For easy description and simplicity, these working processes will not be detailed.
[0089] It is understood that the disclosed system, device, and method in the embodiments of the present disclosure can be realized with other ways. The above-mentioned embodiments are exemplary only. The division of the units is merely based on logical functions while other divisions exist in realization. It is possible that a plurality of units or components are combined or integrated in another system. It is also possible that some characteristics are omitted or skipped. On the other hand, the displayed or discussed mutual coupling, direct coupling, or communicative coupling operate through some ports, devices, or units whether indirectly or communicatively by ways of electrical, mechanical, or other kinds of forms.
[0090] The units as separating components for explanation are or are not physically separated. The units for display are or are not physical units, that is, located in one place or distributed on a plurality of network units. Some or all of the units are used according to the purposes of the embodiments. Moreover, each of the functional units in each of the embodiments can be integrated in one processing unit, physically independent, or integrated in one processing unit with two or more than two units.
[0091] If the software function unit is realized and used and sold as a product, it can be stored in a readable storage medium in a computer. Based on this understanding, the technical plan proposed by the present disclosure can be essentially or partially realized as the form of a software product. Or, one part of the technical plan beneficial to the conventional technology can be realized as the form of a software product. The software product in the computer is stored in a storage medium, including a plurality of commands for a computational device (such as a personal computer, a server, or a network device) to run all or some of the steps disclosed by the embodiments of the present disclosure. The storage medium includes a USB disk, a mobile hard disk, a read-only memory (ROM) , a random access memory (RAM) , a floppy disk, or other kinds of media capable of storing program codes.
[0092] While the present disclosure has been described in connection with what is considered the most practical and preferred embodiments, it is understood that the present disclosure is not limited to the disclosed embodiments but is intended to cover various arrangements made without departing from the scope of the broadest interpretation of the appended claims.
Claims
1.A wireless communication method by a user equipment (UE) , which is capable of communicating with a base station in a network, the method comprising:transmitting, by the UE, a trigger signal to a base station to request system information; andmonitoring the system information after transmitting the trigger signal.2.The method of claim 1, wherein the UE monitors the system information without waiting for a feedback signal from the network.3.The method of claim 1, further comprising:receiving from the network, a feedback signal in response to the trigger signal,wherein the UE monitors the system information after the feedback signal is received from the network.4.The method of any of claims 1 to 3, wherein the trigger signal is a preamble or physical random access channel (PRACH) .5.The method of any of claims 1 to 4, wherein a location of a resource for the UE to transmit the trigger signal is a PRACH occasion.6.The method of any of claims 1 to 5, wherein one or more PRACH occasions are configured for transmitting the trigger signal.7.The method of any of claims 1 to 6, wherein one or more synchronization signal / physical broadcast channel (PBCH) block (SSB) indexes are associated with one PRACH occasion, or one SSB index is associated with one or more PRACH occasions.8.The method of any of claims 1 to 7, wherein the trigger signal triggers a SSB index corresponding to a PRACH occasion where the UE transmits the trigger signal.9.The method of claim 8, wherein the monitoring the system information comprises:monitoring in a search space corresponding to the SSB index.10.The method of any of claims 1 to 6, wherein one or more preambles are associated with one or more SSB indexes.11.The method of claim 10, wherein in one PRACH occasion, a first preamble is associated with a first SSB index, and a second preamble is associated a second SSB index.12.The method of claim 2 or 3, wherein the feedback signal is a downlink control information (DCI) carried in a physical downlink control channel (PDCCH) or a media access control (MAC) header or MAC control element (MAC-CE) or radio resource control (RRC) in a physical downlink share channel (PDSCH) .13.The method of claim 3, wherein the feedback signal comprises one or more indication, and the one or more indication indicates at least one of the followings:a first information relevant to periodicity that the UE monitors the system information;a second information relevant to a starting location where the UE starts to monitor the system information;a third information relevant to an ending location until where the UE monitors the system information.14.The method of claim 13, wherein the first information indicates one of a plurality of candidate periodicities.15.The method of claim 13 or 14, wherein the first information comprises a repetition parameter, when the repetition parameter indicates a first value, system information monitoring is repeated with a first periodicity within a second periodicity;when the repetition parameter indicates a second value, the second periodicity is the periodicity for system information monitoring without repetition within the second periodicity.16.The method of claim 15, wherein:when the repetition parameter indicates the first value, the system information repeated with the first periodicity is for joint decoding;when the repetition parameter indicates the second value, the system information is not for joint decoding.17.The method of claim 13, wherein the second information comprises an offset with respect to the location of the feedback signal.18.The method of claim 13, wherein the second information comprises an offset with respect to the location of the trigger signal.19.The method of claim 17 or 18, further comprising:determining, based on the offset, the starting location where the UE starts to monitor the system information.20.The method of claim 13, further comprising:determining a time interval or time window based on the second information and the third information,wherein system information monitoring is performed in the time window, and stops when the time window ends.21.The method of claim 20, wherein the third information indicates a time duration, and the time window is determined by the starting location of the second information and the time duration.22.The method of any of claims 1 to 21, further comprising:receiving from a first cell a configuration of resource of the trigger signal of a second cell.23.The method of claim 22, further comprising:being informed by the second cell that the configuration of resource of the trigger signal of the second cell is changed when the UE accesses to the second cell or camps on the second cell.24.The method of claim 23, wherein the being informed by the second cell that the configuration of resource of the trigger signal of the second cell is changed comprises:receiving from the second cell a paging message indicating that the configuration is changed.25.The method of claim 24, wherein the paging message carries an updated configuration of resource of the trigger signal of the second cell.26.The method of claim 23 or 24, further comprising:moving to the first cell to get an updated configuration of resource of the trigger signal of the second cell after being informed by the second cell that the configuration is changed.27.A wireless communication method by a base station, which is capable of communicating with a user equipment (UE) in a network, the method comprising:receiving, from the UE, a trigger signal for requesting system information; andbroadcasting the system information after receiving the trigger signal.28.The method of claim 27, further comprising:transmitting to the UE a feedback signal in response to the trigger signal,wherein the system information is broadcast after transmitting the feedback signal.29.The method of claim 27 or 28, wherein the trigger signal is a preamble or physical random access channel (PRACH) .30.The method of any of claims 27 to 29, wherein a location of a resource of the trigger signal is a PRACH occasion.31.The method of any of claims 27 to 30, wherein one or more PRACH occasions are configured for the trigger signal.32.The method of any of claims 27 to 31, wherein one or more synchronization signal / physical broadcast channel (PBCH) block (SSB) indexes are associated with one PRACH occasion, or one SSB index is associated with one or more PRACH occasions.33.The method of any of claims 27 to 32, wherein the trigger signal triggers a SSB index corresponding to a PRACH occasion where the UE transmits the trigger signal.34.The method of any of claims 27 to 31, wherein one or more preambles are associated with one or more SSB indexes.35.The method of claim 34, wherein in one PRACH occasion, a first preamble is associated with a first SSB index, and a second preamble is associated a second SSB index.36.The method of claim 28, wherein the feedback signal is a downlink control information (DCI) carried in a physical downlink control channel (PDCCH) or a media access control (MAC) header or MAC control element (MAC-CE) or radio resource control (RRC) in a physical downlink share channel (PDSCH) .37.The method of claim 28, wherein the feedback signal comprises one or more indication, and the one or more indication indicates at least one of the followings:a first information relevant to periodicity that the UE monitors the system information;a second information relevant to a starting location where the UE starts to monitor the system information;a third information relevant to an ending location until where the UE monitors the system information.38.The method of claim 37, wherein the first information indicates one of a plurality of candidate periodicities.39.The method of claim 37 or 38, wherein the first information comprises a repetition parameter,when the repetition parameter indicates a first value, system information monitoring is repeated with a first periodicity within a second periodicity;when the repetition parameter indicates a second value, the second periodicity is the periodicity for system information monitoring without repetition within the second periodicity.40.The method of claim 39, wherein:when the repetition parameter indicates the first value, the system information repeated with the first periodicity is for joint decoding;when the repetition parameter indicates the second value, the system information is not for joint decoding.41.The method of claim 37, wherein the second information comprises an offset with respect to the location of the feedback signal.42.The method of claim 37, wherein the second information comprises an offset with respect to the location of the trigger signal.43.The method of claim 41 or 42, further comprising:indicating a first offset to a first UE in the feedback signal for the first UE and indicating a second offset to a second UE in the feedback signal for the second UE to sync up the first UE and the second UE to monitor the system information.44.The method of claim 37, wherein the second information and the third information are used for determining a time interval or time window for monitoring the system information.45.The method of claim 44, wherein the third information indicates a time duration, and the time window for monitoring the system information is determined by the starting location of the second information and the time duration.46.The method of any of claims 27 to 45, further comprising:informing the UE that a configuration of resource of the trigger signal is changed.47.The method of claim 46, wherein the informing the UE that the configuration of resource of the trigger signal is changed comprises:transmitting to the UE a paging message indicating that the configuration is changed.48.The method of claim 47, wherein the paging message carries an updated configuration of resource of the trigger signal.49.The method of claim 46 or 47, further comprising:providing an updated configuration of resource of the trigger signal to another base station for the UE to get the updated configuration when the UE accesses to or camps on the another base station.50.A user equipment (UE) , comprising:a memory;a transceiver; anda processor coupled to the memory and the transceiver;wherein the processor is configured to execute the method of any one of claims 1 to 26.51.A base station, comprising:a memory;a transceiver; anda processor coupled to the memory and the transceiver;wherein the processor is configured to execute the method of any one of claims 27 to 49.52.A non-transitory machine-readable storage medium having stored thereon instructions that, when executed by a computer, cause the computer to perform the method of any one of claims 1 to 49.53.A chip, comprising:a processor, configured to call and run a computer program stored in a memory, to cause a device in which the chip is installed to execute the method of any one of claims 1 to 49.54.A computer readable storage medium, in which a computer program is stored, wherein the computer program causes a computer to execute the method of any one of claims 1 to 49.55.A computer program product, comprising a computer program, wherein the computer program causes a computer to execute the method of any one of claims 1 to 49.56.A computer program, wherein the computer program causes a computer to execute the method of any one of claims 1 to 49.
Citation Information
Patent Citations
Techniques for on-demand transmission of dedicated reduced-bandwidth system information
US20220104094A1
Power-efficient network state
WO2022040961A1
Techniques for transmitting remaining minimum system information
WO2023014520A1