A method and device for indicating broadcast signaling

Abstract

The present application discloses a broadcast signaling indication method and device for use in a wireless communication system. The method includes: a first downlink signaling for scheduling system messages of an intermediate device; a second downlink signaling for scheduling system messages of a terminal device; wherein, the scrambling identifier of the first downlink signaling is different from that of the second downlink signaling, the control channel set of the first downlink signaling is different from that of the second downlink signaling, and / or the search space of the first downlink signaling is different from that of the second downlink signaling. The present application also includes a device for implementing the method. The present application can solve the problem that the parameters in the system information notified by a network device to an intermediate device and the system information broadcast by a base station to a terminal cannot be distinguished, resulting in unnecessary update operations by the network.

Description

Technical Field

[0001] This application relates to the field of wireless communication technologies, and in particular, to a broadcast signaling indication method and device. Background Art

[0002] The NR terminal performs blind detection of SSB, uses PSS / SSS for cell search to complete frequency and time synchronization, obtains the system information MIB, and MIB is broadcast together with the SSB. After obtaining the MIB, the next system message SIB1 is obtained. The search space parameters of the PDCCH for obtaining SIB1 are configured in the MIB, and once the MIB is obtained, this PDCCH can be checked to obtain SIB1. SIB1 contains the scheduling information of other SIBs and other SIs, including the mapping relationship from SIBx to other SIs and the scheduling period and transmission window size of other SIs. SIB1 is broadcast on the downlink data channel and mainly contains the following types of information: cell selection parameters, access control parameters, channel configuration information related to initial access, system message request configuration information, scheduling information of other system messages, whether VoIP services are supported, etc. The PDCCHs scheduling SIB1 and other SIs are both scrambled with a specific UE identifier, that is, SI-RNTI. Among them, the content of SIB2 in other SIs is the common parameters for intra-frequency, inter-frequency, and inter-RAT cell reselection, as well as the configuration parameters for intra-frequency cell reselection.

[0003] The UE does not repeatedly obtain the system message in each broadcast period of the system message. Only when the broadcast parameters in the serving cell change, or the system message exceeds the maximum validity period, will the UE re-obtain the system message of this cell to achieve the purpose of power saving. There is a systemInfoValueTag field in SIB1, and through this field, it can be judged whether the current system information other than MIB / SIB1 is still valid. The UE reads the valueTag value of the system message in the SIB1 message and compares it with the previous value. When the system information changes, this value will increase. The terminal can confirm whether the previously stored system information of this cell has changed by checking whether this value has changed. If it changes, it is considered that the system message content has changed, and the UE re-obtains the system message; otherwise, the UE considers that the system message has not changed and does not re-obtain the system message. The terminal can also obtain whether the system message has changed by retrieving the downlink control signaling scrambled with the paging identifier P-RNTI. Summary of the Invention

[0004] This application proposes a broadcast signaling indication method, device, and system to solve the problem that the parameters in the system information notified by the network device to the intermediate device cannot be distinguished from the system information broadcast by the base station to the terminal, resulting in unnecessary update operations by the network.

[0005] In a first aspect, an embodiment of this application provides a broadcast signaling indication method for a wireless communication system, which includes a network device, an intermediate device, and a terminal device; the service signal sent by the network device directly reaches the terminal device or is reflected to the terminal device through the intermediate device, and the method includes:

[0006] A first downlink signaling for scheduling the system message of the intermediate device;

[0007] A second downlink signaling for scheduling the system message of the terminal device;

[0008] The scrambling identifier of the downlink control channel of the first downlink signaling is different from that of the second downlink signaling, and / or the set of control channels of the first downlink signaling is different from that of the second downlink signaling, and / or the search space of the first downlink signaling is different from that of the second downlink signaling.

[0009] Preferably, the frequency domain position of the set of control channels where the first downlink signaling is located is obtained by combining the frequency domain position of the search space of the second downlink signaling with frequency domain offset information or is pre-configured.

[0010] Preferably, the time domain position of the set of control channels where the first downlink signaling is located is obtained by combining the time domain position of the search space of the second downlink signaling with time domain offset information or is pre-configured.

[0011] Preferably, the system message for the terminal device is different from the system message for the intermediate device.

[0012] Preferably, the identifier includes a first identifier dedicated to the intermediate device, and / or the identifier includes a second identifier dedicated to the terminal device.

[0013] In any embodiment of the first aspect of this application, further, a third downlink signaling is included; the third downlink signaling is used to change the system information of the intermediate device; the third downlink signaling occupies the reserved bits of the downlink control signaling for the terminal.

[0014] Further, the method of the first aspect of this application is used for a network device and includes the following steps:

[0015] The network device determines the identifier and the system message, scrambles the downlink physical control channel with the identifier, and sends the first downlink signaling and / or the second downlink signaling.

[0016] Further, the method according to the first aspect of the present application is used in a network device, and further includes the following steps:

[0017] The network device sends a third downlink signaling scrambled with a paging identifier, where the third downlink signaling is used for system information change of a wireless intermediate device; the third downlink signaling occupies reserved bits for downlink control signaling of a terminal, so as to be distinguished from the terminal obtaining system information change.

[0018] Further, the method according to the first aspect of the present application is used in an intermediate device, and includes the following steps:

[0019] The intermediate device descrambles a downlink control channel through a first identifier and receives the first downlink signaling;

[0020] Obtain system messages for the intermediate device according to the indication of the first downlink signaling.

[0021] Further, the method according to the first aspect of the present application is used in an intermediate device, and further includes the following steps:

[0022] The intermediate device detects a third downlink signaling scrambled with a paging identifier and obtains system information change for a wireless intermediate device; the third downlink signaling occupies reserved bits for downlink control signaling of a terminal, so as to be distinguished from the terminal obtaining system information change.

[0023] Further, the method according to the first aspect of the present application is used in a terminal device, and includes the following steps:

[0024] The terminal device descrambles a downlink control channel through a second identifier and receives a second downlink signaling;

[0025] Obtain system messages for the terminal device according to the indication of the second downlink signaling.

[0026] In a second aspect, an embodiment of the present application further provides a communication device (i.e., a network device) for implementing the method according to any one of the embodiments of the first aspect of the present application. At least one module in the network device is used for at least one of the following functions: determining a control channel set and / or a search space; determining a scrambling identifier; sending the first downlink signaling and / or the second downlink signaling.

[0027] In a third aspect, an embodiment of the present application further provides a communication device (i.e., an intermediate device) for implementing the method according to any one of the embodiments of the first aspect of the present application. At least one module in the intermediate device is used for at least one of the following functions: determining a control channel set and / or a search space for the intermediate device; descrambling a downlink control channel through a first identifier and receiving the first downlink signaling; obtaining system messages for the intermediate device according to the indication of the first downlink signaling.

[0028] Fourthly, an embodiment of the present application further provides a communication device (i.e., a terminal device) for implementing the method described in any one of the embodiments of the first aspect of the present application. At least one module in the terminal device is used for at least one of the following functions: determining a control channel set and / or a search space for the terminal device; descrambling a downlink control channel by a second identifier and receiving the second downlink signaling; obtaining a system message for an intermediate device according to an indication of the second downlink signaling.

[0029] Fifthly, the present application further provides a communication device, including: a memory, a processor, and a computer program stored on the memory and executable on the processor, where when the computer program is executed by the processor, the steps of the method described in any one of the embodiments of the present application are implemented.

[0030] Sixthly, the present application further provides a computer-readable medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the method described in any one of the embodiments of the present application are implemented.

[0031] Seventhly, the present application further provides a mobile communication system, including at least one network device described in any one of the embodiments of the present application and at least one intermediate device described in any one of the embodiments of the present application. Further, it further includes at least one terminal device described in any one of the embodiments of the present application.

[0032] The above at least one technical solution adopted in the embodiments of the present application can achieve the following beneficial effects:

[0033] It can enable the intermediate device to search for downlink control information for scheduling the system information for the intermediate device in a search space and a control channel set different from those of the terminal, so that the system information scheduled for the intermediate device is different from the system information scheduled for the terminal, reducing some unnecessary operations of the intermediate device, saving the energy consumption of the intermediate device, and at the same time reducing the system overhead introduced in the system. Description of the Drawings

[0034] The drawings described herein are used to provide a further understanding of the present application, and constitute a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0035] Figure 1 It is a schematic diagram of a multi-antenna wireless communication system enhanced by an intelligent metasurface;

[0036] Figure 2 It is a flowchart of an embodiment of the method of the present application;

[0037] Figure 3Flowchart of an embodiment of the method of this application for a network device;

[0038] Figure 4 Flowchart of an embodiment of the method of this application for an intermediate device;

[0039] Figure 5 Is the flowchart of an embodiment of the method of this application for a terminal device;

[0040] Figure 6 Is a schematic diagram of an embodiment of a network device;

[0041] Figure 7 Is a schematic diagram of an embodiment of an intermediate device;

[0042] Figure 8 Is a schematic diagram of an embodiment of a terminal device;

[0043] Figure 9 Is a schematic structural diagram of the network device of the present invention;

[0044] Figure 10 Is a block diagram of the intermediate device of the present invention;

[0045] Figure 11 Is a block diagram of the terminal device of the present invention. Detailed implementation manners

[0046] To make the objectives, technical solutions and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments of this application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0047] When intermediate devices such as wireless relays or intelligent metasurfaces (an intermediate device refers to an auxiliary device inserted between a data terminal and a signal conversion device to complete some additional functions before modulation or after demodulation) receive system information, if the system information notified to the intermediate device by a network device, such as a base station, is the same as the system information notified to the terminal, the following problems will occur:

[0048] Of course, it is simple for the base station to maintain the same SIB1 / 2 set for the terminal and the intermediate device. However, when the SIB information that does not affect the intermediate device, such as SIB3, changes, the valueTag in SIB1 also needs to change. If the same SIB1 / 2 set is maintained for the terminal and the intermediate device, this change will also trigger the reconfiguration process of the intermediate device to notify the change of the system information of the intermediate device, resulting in unnecessary update operations of the network, because the update of these parameters only increases the operations of the intermediate device and does not bring optimization to the intermediate device.

[0049] To this end, a broadcast signaling indication method and device are provided, which can enable an intermediate device to search for downlink control information for scheduling system information for the intermediate device in a search space or control channel set different from that of a terminal, so that the system information scheduled for the intermediate device is different from the system information scheduled for the terminal, reducing some unnecessary operations of the intermediate device, saving the energy consumption of the intermediate device, and at the same time reducing the system overhead introduced in the system.

[0050] The following will combine with the accompanying drawings to detail the technical solutions provided by the embodiments of the present application.

[0051] Figure 1 It is a schematic diagram of an intelligent metasurface-enhanced multi-antenna wireless communication system.

[0052] The intelligent metasurface is similar to the dish antenna used in satellite receivers and is a passive device that reflects signals to improve the signal-to-noise ratio. Different phase shift patterns of its different meta-surfaces cause incident signals to be reflected as light beams in different directions. The intelligent metasurface is a complement to traditional large-scale MIMO technology. Different from large-scale MIMO systems and cooperative relays, although the intelligent metasurface also attempts to improve the propagation conditions by deploying active hardware components, the intelligent metasurface only requires a very small operating power and is therefore suitable for implementation in energy-limited systems. In addition, the intelligent metasurface can naturally work in full-duplex mode without the need for expensive self-interference cancellation. In addition, the intelligent metasurface is a very thin material and can be deployed on building facades and interior walls. Therefore, once a traditional network is deployed, one or more intelligent metasurfaces can be flexibly deployed to mitigate detected coverage holes or provide additional capacity in areas where needed.

[0053] Deploying an intermediate device in a traditional MIMO system is beneficial for two types of beamforming, as Figure 1 shown, an intermediate device with an intelligent metasurface is deployed in a system to assist in the communication between a multi-antenna transmitter and a user. The information signal radiates from the transmitter, and there may be a direct path for communication between the transmitter and the user. At the same time, the intermediate device also receives the information signal and reflects it. With the help of an infrared controller, the main direction of the reflected signal can be controlled. In particular, appropriate phase shifts are introduced on all meta-atoms to deliberately create a coherent combination of their respective scattered signals, thereby generating a signal beam focused on the user. The larger the surface, the narrower the beam. This strategy is called energy focusing.

[0054] On the other hand, if there is no direct path due to severe shadowing or blockage, the transmitter should perform beamforming on the intelligent metasurface. Then, the intelligent metasurface can act as a non-amplified full-duplex relay in the middle, reflecting and focusing the signal onto the terminal device UE to assist end-to-end communication. In Figure 1 , consider a scenario where a multi-antenna transmitter serves User 1 in the presence of User 2. Assume that the two UEs have different security levels, where the message of User 1 cannot be decoded by User 2. In this case, by adjusting the phase of the scattered signal to stop the signal at User 2, destructive reflection can be performed at the intelligent metasurface, and this strategy is called energy nulling.

[0055] Utilizing these two principles, it is expected that intelligent metasurfaces will have a wide range of applications in various communication systems, including interference management, coverage extension, and capacity improvement, such as wireless communication systems, cognitive radio networks, physical layer security systems, etc.

[0056] It should be noted that the intermediate device of this application controls the waveform parameters when the electromagnetic wave propagates in the communication channel by means of reflection or refraction to improve the performance of the communication system, and is not limited to using intelligent metasurface technology only.

[0057] Figure 2 This is a flowchart of an embodiment of the method of this application.

[0058] An embodiment of this application provides a broadcast signaling indication method for a wireless communication system. The wireless communication system includes a network device, an intermediate device, and a terminal device. The service signal sent by the network device directly reaches the terminal device or is reflected by the intermediate device to the terminal device. The method includes the following steps:

[0059] Step 101, determine the control channel set and / or search space.

[0060] In a specific implementation, determine the control channel set and / or search space where the first downlink signaling and the second downlink signaling are located.

[0061] The control channel set and / or search space where the first downlink signaling and the second downlink signaling are located are different. Specifically, the frequency domain position of the control channel set where the first downlink signaling is located is obtained by combining the frequency domain position of the search space of the second downlink signaling with frequency domain offset information, or the time domain position of the control channel set where the first downlink signaling is located is obtained by combining the time domain position of the search space of the second downlink signaling with time domain offset information.

[0062] For example, considering the differences between the wireless intermediate node and the terminal, in order to distinguish the different RBs where different broadcast information control channels are located, the PRB offset between the control channel set CORESET0_RIS and the SSB of the wireless intermediate node is set differently from that of the terminal. During the initial cell search process, the intermediate device obtains the MIB information through the PBCH, which includes information such as frequency, SFN, subcarrier spacing, k_ssb, and pdcch_configSIB1. Based on this information, the relevant information of CORESET0 and the search space type type0-CSS is obtained for the terminal to obtain the scheduling information of SIB1. Specifically, the information of CORESET0 and search space 0 can be obtained by looking up the table using the high 4 bits and low 4 bits of pdcch_configSIB1 in the MIB.

[0063] When performing the CORESET0 configuration table lookup, the multiplexing mode between CORESET0 and the SSB, the number of frequency-domain RBs of CORESET0, the number of time-domain symbols, and the RB offset of the starting RB of CORESET0 relative to the lower boundary of the SSB frequency-domain RB can be obtained. For multiplexing mode 1, the SSB and CORESET0 are time-division multiplexed in the time domain, the SSB and CORESET0 are located on different symbols in the time domain, and the frequency-domain range of CORESET0 includes the SSB, that is, the starting RB position of CORESET0 is always lower than or equal to the lower boundary of the SSB frequency domain.

[0064] In the frequency-domain position, the placement of the SSB follows the synchronization raster, while the placement of the center frequency of the carrier where the PDCCH / PDSCH is located follows the channel raster. The kss in the MIB indicates the offset between the SSB subcarrier 0 and the starting position of the CORESET0 CRB. TS38.213 gives the PRB offset between CORESET0 and the SSB. Taking Table 1 as an example, index1 indicates that the pattern format of CORESET0 is 1, the number of RBs of CORESET0 is 24, the number of symbols of CORESET0 is 2, and the offset RB number between CORESET0 and the SSB is 2.

[0065] Table 1: Set of resource blocks and slot symbols of CORESET for Type0-PDCCH search space set when {SS / PBCH block, PDCCH} SCS is {15,15} kHz for frequency bands with minimum channel bandwidth 5 MHz or 10 MHz (quoted from Table 13-1 in 3GPP TS38.213 standard).

[0066]

[0067] Method 1: The information of CORESET0_RIS for the intermediate device is predefined in the base station and the intermediate device, where A1 represents the multiplexing format of CORESET0 for the intermediate device, A2 represents the number of RBs, A3 represents the number of symbols, and offset_RIS is the PRB offset between CORESET0_RIS and SSB, and the value is different from the configuration of the terminal, as shown in Table 2.

[0068] Table 2:

[0069]

[0070] For example, the MIB information obtained by the intermediate device by default indicates the information shown in the table for CORESET0_RIS.

[0071] Method 2: The intermediate device still decodes the information of CORESET0 for the terminal. A new offset (offset_RIS_UE) is predefined in the base station and the intermediate device. The intermediate device offsets by one frequency-domain offset at the frequency-domain position of CORESET0 for the frequency-domain position of CORSET0_RIS.

[0072] For example, after the intermediate device decodes the MIB information and obtains the information in index 2 of Table 13-1, the offset number of RBs between CORESET0 and SSB is 2. The intermediate device offsets the RBs by the new offset (offset_RIS_UE), that is, the frequency offset of the RBs of CORESET0_RIS for the intermediate device relative to the SSB of the terminal is 2 + offset_RIS_UE.

[0073] For another example, considering the difference between the intermediate device and the terminal, in order to distinguish the different time slots where different system information search spaces are located, the type0_commonsearchspace_RIS for the intermediate device is set differently from the type0_commonsearchspace for the terminal.

[0074] For the type0 common search space of multiplexing mode 1, the base station (network equipment) side schedules SIB1 PDCCH in two consecutive slots starting from n0. These two slots are located in the Type0 PDCCH-CSS monitoring window with a period of 20ms. The calculation of slot index n0 is as follows:

[0075]

[0076] When n0 mod 2 = 0, it is located in the first radio frame of 20ms, otherwise it is located in the second radio frame. The parameter O is used to control the position of the common search space detection window of type0 corresponding to the first SSB to avoid conflict with SSB, and the parameter M controls the degree of overlap of the common search space detection windows corresponding to the i-th SSB and the i+1-th SSB.

[0077] Method 1: Set the time slot offset n_RIS for the intermediate device to obtain the search space. After the intermediate device obtains the time slot information n0 about the search space in the MIB, it sets the time slot start position of the search space to n0+n_RIS, where n_RIS is pre-defined by the base station and the intermediate device.

[0078] Method 2: After the intermediate device obtains the time slot information n0 about the search space in the MIB, it sets the time slot start position of the search space to the next two time slots after n0+2. If the current time slot conflicts with the SSB, the search is postponed to the next time slot.

[0079] For another example, as shown in Table 3 below, it can be seen from the table that CORESET0 occupies only one symbol in the time domain. The period of the type0 common search space in CORESET0 is equal to the period of the SSB block, and CORESET0 and the SSB block are in the same time slot, and the time slot number and frame number are given in the table. When the SCS combination is <120kHz, 60kHz>, SSB and CORESET0 are in the same radio frame, and when the index of SSB is i=4k, i=4k+1, i=4k+2 and i=4k+3, the time domain starting positions of the type0 common search space in CORESET0 are 0, 1, 6, and 7 respectively.

[0080] Table 3: PDCCH monitoring occasions for Type0-PDCCH CSS set-SS / PBCH block and CORESET multiplexing pattern 2 and {SS / PBCH block, PDCCH} SCS {120, 60} kHz (quoted from 3GPP TS 38.213 Table 13-13 standard).

[0081]

[0082]

[0083] Considering the differences between intermediate devices and terminals, in order to distinguish the different time slots where different system information search spaces are located, the type0_commonsearchspace_RIS of the intermediate device is set differently from the type0_commonsearchspace set for the terminal.

[0084] Method 1: The period of the type0 common search space type0_commonsearchspace_RIS of CORESET0_RIS for the intermediate device is equal to the period of the SSB block, but CORESET0_RIS and the SSB block are not in the same time slot. The specific time slot where the common search space is located is predefined between the base station and the intermediate node, or the time slot before or after the time slot where the SSB is located.

[0085] Method 2: The period of the type0 common search space type0_commonsearchspace_RIS of CORESET0_RIS for the intermediate device is equal to the period of the SSB block. CORESET0_RIS and the SSB block are in the same time slot, but the symbols where they are located are different from the symbols where the search space of the terminal is located. For example, when the SCS combination is <120kHz, 60kHz>, the SSB and CORESET0 are in the same radio frame, and when the index of the SSB is i = 4k, i = 4k + 1, i = 4k + 2, and i = 4k + 3, the first OFDM symbol indices of the search space for the intermediate device are 6, 7, 12, 13, Table 4.

[0086] Table 4: 60KHz

[0087]

[0088] 120KHz

[0089] For another example, it can be seen from Table 5 that in pattern 3, CORESET0 fixedly occupies the first two symbols of the SSB in the time domain. When the index of the SSB is i = 4k, i = 4k + 1, i = 4k + 2, and i = 4k + 3, the type0 common search spaces in CORESET0 are 4, 8, 2, and 6 respectively;

[0090] Table 5: PDCCH monitoring occasions for Type0-PDCCH CSS set-SS / PBCH block and CORESET multiplexing pattern 3 and {SS / PBCH block, PDCCH} SCS {120, 120} kHz (quoted from 3GPP TS 38.213 Table 13-15 standard).

[0091]

[0092] Considering the differences between the intermediate device and the terminal, in order to distinguish the different time slots where the different system information search spaces are located, the type0_commonsearchspace_RIS of the intermediate device is set differently from the type0_commonsearchspace set for the terminal.

[0093] Method 1: The period of the type0 common search space type0_commonsearchspace_RIS of CORESET0_RIS for the intermediate device is equal to the period of the SSB block, but CORESET0_RIS and the SSB block are not in the same time slot. The specific time slot where the common search space is located is predefined between the base station and the intermediate node, or the previous time slot or the next time slot of the time slot where the SSB is located.

[0094] Method 2: The period of the type0 common search space type0_commonsearchspace_RIS of CORESET0_RIS for the intermediate device is equal to the period of the SSB block. CORESET0_RIS and the SSB block are in the same time slot, but the symbols where they are located are different from the symbols where the search space of the terminal is located. For example, when the SCS combination is 120 kHz, 120 kHz> as shown in Table 5, it can be seen from the table that in pattern 3, CORESET0 fixedly occupies the first two symbols of the SSB in the time domain. When the index of the SSB is i = 4k, i = 4k + 1, i = 4k + 2, and i = 4k + 3, the time domain start symbols of the first OFDM symbol index of the search space for the intermediate device are 5, 9, 3, and 7;

[0095] The system messages indicated by the first downlink signaling for the intermediate device are different from those for the terminal device.

[0096] Step 102: Determine an identifier for scrambling and descrambling the Physical Downlink Control Channel (PDCCH).

[0097] In a specific implementation, determine the scrambling and descrambling identifier according to the type of the receiving device. Determine the first downlink signaling and the second downlink signaling, where the first downlink signaling is used to schedule the system message of the intermediate device; the second downlink signaling is used to schedule the system message of the terminal device.

[0098] Wherein, when the downlink control channel scrambling identifier of the first downlink signaling is the same as or different from that of the second downlink signaling, the control channel set of the first downlink signaling is different from that of the second downlink signaling, and / or the search space of the first downlink signaling is different from that of the second downlink signaling.

[0099] When the downlink control channel scrambling identifier of the first downlink signaling is different from that of the second downlink signaling, the control channel set and / or the search space where the first downlink signaling and the second downlink signaling are located may be the same or different.

[0100] Specifically, the identifier includes a first identifier dedicated to the intermediate device, and / or the identifier includes a second identifier dedicated to the terminal device.

[0101] For example, the first identifier is RIS-SI-RNTI, and the second identifier is SI-RNTI.

[0102] For example, for the PDCCH scrambled with SI-RNTI, obtain the broadcast information for the terminal device indicated in the corresponding Physical Downlink Shared Channel (PDSCH), such as SIB1.

[0103] For another example, for the PDCCH scrambled with RIS-SI-RNTI, obtain the corresponding PDSCH to indicate the broadcast information of the radio intermediate device, such as RIS-SIB1.

[0104] Step 103: Transmit the PDCCH and the corresponding PDSCH, where the system message is included in the PDSCH. The transmitting end scrambles and the receiving end descrambles, and determine the position of the PDSCH according to the scheduling information in the PDCCH.

[0105] Specifically, transmit the first downlink signaling and the second downlink signaling scrambled with the identifier.

[0106] The embodiments of the present application enable an intermediate device to search for downlink control information for scheduling system information for the intermediate device in a search space or control channel set different from that of a terminal, so that the system information scheduled for the intermediate device is different from the system information scheduled for the terminal, reducing some unnecessary operations of the intermediate device, saving the energy consumption of the intermediate device, and at the same time reducing the system overhead introduced into the system.

[0107] Furthermore, the identifiers used for scrambling the intermediate device and the terminal device are different.

[0108] In a specific implementation, when the identifiers used for scrambling the intermediate device and the terminal device are different, the control channel set and / or the search space can be the same or different. It is used according to the actual situation and is not limited here.

[0109] Specifically, the RIS-SIB1 signaling scheduled by the intermediate device according to the downlink control information received in the control signaling set and the search space is different from the SIB1 signaling of the terminal.

[0110] For example, the value tag of the system message indicated in the SIB1 signaling scheduled by the terminal is different from the value tag of the system message of the radio intermediate device.

[0111] For example, only the information of RIS-SIB2 is configured in the system information window indicated in the RIS-SIB1 signaling, and other SIB messages are not used for the intermediate device, so corresponding configurations do not need to be made.

[0112] For example, the RIS-SIB1 signaling does not need to indicate information such as whether IMS and VoIP services are supported.

[0113] Step 104: Transmit a third downlink signaling scrambled with a paging identifier; the third downlink signaling is used to change the system information of the intermediate device; the third downlink signaling occupies the reserved bits of the downlink control signaling for the terminal.

[0114] For example, the intermediate device detects the third downlink signaling scrambled with the P-RNTI (the same as the paging identifier of the terminal) for paging, obtains the change of the system information for the intermediate device, and distinguishes it from the change of the system information of the terminal.

[0115] In a specific implementation, the radio intermediate device detects DCI format 1_0 scrambled with P-RNTI (which can be the same as the paging identifier of the terminal). The specific format of the design of DCI format1_0 is as follows:

[0116] Send a 2-bit short message indication. When the indication is 10, there is only a short message in the DCI. The short message here is defined with 8 bits in TS 38.331. Among them, bit 1 is used for system message change, bit 2 is used for eTWS indication, bit 3 is used for the indication to stop detecting paging, and the remaining bits are all reserved bits. The designed third downlink control signaling occupies the reserved bits among them and is used to indicate the system information change of the radio intermediate node.

[0117] The information of DCI format 1_0 is indicated to the radio intermediate device as follows:

[0118] -Short Messages Indicator–2bits indicates only short messages

[0119] -Short Messages–8bits, indicated according to the following table.

[0120]

[0121] When the radio intermediate device detects that systemInfoModification_RIS is 1, it determines that the system information for the radio intermediate device has changed, and thus re-obtains the new system information. By this method, it can be distinguished from the system information change of the terminal.

[0122] Figure 3 This is the flowchart of the embodiment of the method of this application for the network device.

[0123] The method of the first aspect of this application for the network device includes the following steps:

[0124] Step 201: Determine the channel set and / or search space according to the receiving device.

[0125] Specifically, determine the channel set and / or search space where the first downlink signaling is located according to the intermediate device, which is the first channel set and / or the first search space; determine the channel set and / or search space where the second downlink signaling is located according to the terminal device, which is the second channel set and / or the second search space. For a specific embodiment, see step 101.

[0126] Step 202: Determine an identifier, which is used to scramble and descramble the downlink control channel.

[0127] Specifically, determine the identifier according to the receiving device. Determine the first downlink signaling and the second downlink signaling. The first downlink signaling is used to schedule the system message of the intermediate device, and the second downlink signaling is used to schedule the system message of the terminal device.

[0128] For example, the scrambling identifier of the downlink control channel of the first downlink signaling is different from that of the second downlink signaling; and / or it is determined that the control channel set of the first downlink signaling is different from the control channel set of the second downlink signaling; and / or the search space of the first downlink signaling is different from the search space of the second downlink signaling.

[0129] Step 203: Determine the system message according to the receiving device.

[0130] Specifically, the network device generates a system message for the intermediate device and / or a system message for the terminal device.

[0131] Step 204: Transmit the scrambled first downlink signaling and / or second downlink signaling.

[0132] Step 205: Transmit a third downlink signaling scrambled with a paging identifier, where the third downlink signaling is used for system information change of the radio intermediate device; the third downlink signaling occupies reserved bits of the downlink control signaling for the terminal, and is distinguished from the terminal obtaining system information change.

[0133] Figure 4 This is a flowchart of an embodiment of the method of this application for an intermediate device.

[0134] The method of the first aspect of this application for an intermediate device includes the following steps:

[0135] Step 301: Determine the channel set and / or search space.

[0136] Specifically, determine the control channel set and / or search space where the first downlink signaling is located, that is, the first control channel set and / or the first search space. For specific embodiments, see step 101.

[0137] Step 302: Receive the first downlink signaling scrambled with an identifier, and descramble to obtain the first downlink signaling.

[0138] Specifically, determine that the scrambling identifier of the first downlink signaling is the first identifier, descramble the PDCCH according to the first identifier, and receive the PDCCH and the corresponding PDSCH.

[0139] Step 303: Obtain the system message for the intermediate device according to the first downlink signaling.

[0140] Step 304: Detect the third downlink signaling scrambled with a paging identifier, and obtain the system information change for the radio intermediate device; the third downlink signaling occupies reserved bits of the downlink control signaling for the terminal, and is distinguished from the terminal obtaining system information change.

[0141] Figure 5 This is a flowchart of an embodiment of the method of this application for a terminal device.

[0142] Step 401, determine a channel set and / or a search space.

[0143] Specifically, determine the control channel set and / or the search space where the second downlink signaling is located, that is, the second control channel set and / or the second search space. For specific embodiments, see Step 101.

[0144] Step 402, receive the second downlink signaling after identity scrambling, and descramble to obtain the second downlink signaling.

[0145] Specifically, determine that the scrambling identity is the second identity, descramble the PDCCH according to the second identity, and receive the PDCCH and the corresponding PDSCH.

[0146] Step 403, obtain the system message for the terminal device according to the second downlink signaling.

[0147] Figure 6 It is a schematic diagram of an embodiment of a network device.

[0148] An embodiment of the present application also proposes a communication device (i.e., a network device), which uses the method of any one of the embodiments of the present application. At least one module in the network device is used for at least one of the following functions: determining a control channel set and / or a search space; determining the scrambling identity according to the type of the receiving device; sending the first downlink signaling, the second downlink signaling, and / or the third downlink signaling with a paging identity after identity scrambling.

[0149] To implement the above technical solutions, a communication device 500 proposed by the present application includes a network sending module 501, a network determining module 502, and a network receiving module 503.

[0150] The network sending module is used to send the first downlink signaling, the second downlink signaling, and / or the third downlink signaling with a paging identity after scrambling through the resources of the control channel set and / or the search space.

[0151] The network determining module is used to determine an identity, which is used for scrambling and descrambling. Specifically, use the same scrambling identity, or use the first identity for intermediate devices and the second identity for terminal devices; and determine the channel set and / or the search space according to the type of the receiving device. Specifically, when the receiving device is an intermediate device, it is the first control channel set and / or the first search space, and when the receiving device is a terminal device, it is the second control channel set and / or the second search space; it is also used for.

[0152] The network receiving module is used to receive uplink signaling.

[0153] Other specific methods for implementing the functions of the network sending module, network determining module, and network receiving module are as described in the method embodiments of the present application and will not be elaborated here.

[0154] The network device described in the present application may be a base station device or a network-side processing device connected to the base station.

[0155] Figure 7 It is a schematic diagram of an embodiment of an intermediate device.

[0156] The present application also proposes a communication device (i.e., an intermediate device) that uses the method of any embodiment of the present application. At least one module in the intermediate device is used for at least one of the following functions: determining a first control channel combination and / or a first search space; determining a first identifier; descrambling a downlink control channel through the first identifier and receiving the first downlink signaling; obtaining a system message for the intermediate device according to the indication of the first downlink signaling. Descrambling a downlink control channel through a paging identifier and receiving the third downlink signaling; obtaining a system message change for the intermediate device according to the indication of the third downlink signaling.

[0157] To implement the above technical solution, an intermediate device 600 for controlling a reflection unit (such as intelligent metasurface 604) or other phase transformation devices proposed by the present application includes an intermediate sending module 601, an intermediate determining module 602, and an intermediate receiving module 603.

[0158] The intermediate receiving module is used to receive the first downlink signaling scrambled with an identifier and / or the third downlink signaling scrambled with a paging identifier through the resources of the first control channel set and / or the first search space; the intermediate receiving module is further used to receive downlink data PDSCH and obtain a system message for the intermediate device.

[0159] The intermediate determining module is used to determine a first identifier; and determine a first control channel set and / or a first search space; further, the intermediate determining module determines the location of the system message for the intermediate device according to the indication of the first downlink signaling; further, the intermediate determining module determines the system message change for the intermediate device according to the indication of the third downlink signaling.

[0160] The intermediate sending module is used to forward downlink signals and uplink signals.

[0161] The intermediate device described in the present application may refer to a mobile terminal connected to a reflection unit or other phase transformation devices or other devices dedicated to controlling the reflection unit or other phase transformation devices.

[0162] Figure 8 It is a schematic diagram of an embodiment of a terminal device;

[0163] The present application also provides a communication device (i.e., a terminal device) that uses the method of any embodiment of the present application. At least one module in the terminal device is used for at least one of the following functions: determining a second control channel combination and / or a second search space; determining a second identifier; descrambling a downlink control channel using the second identifier and receiving the second downlink signaling; and obtaining a system message for the terminal device according to the indication of the second downlink signaling.

[0164] To implement the above technical solution, a terminal device 700 provided by the present application includes a terminal sending module 701, a terminal determining module 702, and a terminal receiving module 703.

[0165] The terminal receiving module is configured to receive the identification-scrambled downlink control channel PDCCH through the resources of the second control channel set and / or the second search space, and obtain the second downlink signaling; the terminal receiving module is further configured to receive the downlink data PDSCH and obtain a system message for the terminal device.

[0166] The terminal determining module is configured to determine a second identifier; and determine a second control channel set and / or a second search space; further, the terminal determining module determines the location of the system message for the terminal device according to the indication of the second downlink signaling.

[0167] The terminal sending module is configured to send an uplink signal.

[0168] The terminal device described in the present application may be a mobile terminal device.

[0169] Figure 9 The structural schematic diagram of the network device of the present invention is shown. As shown in the figure, the network device 800 includes a processor 801, a wireless interface 802, and a memory 803. Among them, the wireless interface may be multiple components, that is, including a transmitter and a receiver, and provides a unit for communicating with various other devices on the transmission medium. The wireless interface realizes the communication function with the intermediate device, processes wireless signals through the receiving and transmitting devices, and the data carried by its signals communicates with the memory or the processor through the internal bus structure. The memory 803 contains a computer program for implementing any embodiment of the present application related to the network device, and the computer program runs or changes on the processor 801. When the memory, the processor, and the wireless interface circuit are connected through a bus system. The bus system includes a data bus, a power bus, a control bus, and a status signal bus, which will not be elaborated here.

[0170] Figure 10It is a block diagram of an intermediate device according to another embodiment of the present invention. The intermediate device 900 includes at least one processor 901, a memory 902, a network interface 903, and at least one control interface 904. Each component in the intermediate device 900 is coupled together through a bus system. The bus system is used to realize the connection and communication between these components. The bus system includes a data bus, a power bus, a control bus, and a status signal bus.

[0171] The control interface 904 is used to connect to the phase transformation device (such as a metasurface device) of the intermediate device, convert the multi-group control parameters into drive signals for each surface unit, and realize the adjustment of the reflection (or refraction) signal of the intermediate device.

[0172] Figure 11 It is a block diagram of the terminal device of the present invention.

[0173] The terminal device A00 includes at least one processor A01, a memory A02, a user interface A03, and at least one network interface A04. Each component in the terminal device A00 is coupled together through a bus system. The bus system is used to realize the connection and communication between these components. The bus system includes a data bus, a power bus, a control bus, and a status signal bus.

[0174] The user interface A03 may include a display, a keyboard, or a pointing device, such as a mouse, a trackball, a touchpad, or a touch screen, etc.

[0175] Figures 10 - 11 The memories 902, A02 store executable modules or data structures. The operating system and application programs can be stored in the memory. Among them, the operating system contains various system programs, such as the framework layer, the core library layer, the driver layer, etc., for realizing various basic services and processing hardware-based tasks. The application programs contain various application programs, such as a media player, a browser, etc., for realizing various application services.

[0176] In the embodiments of the present invention, the memory 902 contains a computer program for executing any one of the embodiments of the present application related to the intermediate device, or the memory A02 contains a computer program for executing any one of the embodiments of the present application related to the terminal device, and the computer program runs or changes on the processors 901, A01.

[0177] The memories 902, A02 contain computer-readable storage media, and the processors 901, A01 read the information in the memories 902, A02 and complete the steps of the above method in combination with their hardware. Specifically, a computer program is stored on the computer-readable storage medium, and when the computer program is executed by the processors 901, A01, it realizes the steps of the method embodiments described in any one of the above embodiments.

[0178] The processor 901, A01 may be an integrated circuit chip with signal processing capabilities. In the implementation process, the steps of the method of the present application can be completed by the integrated logic circuit of the hardware in the processor 901, A01 or the instructions in the form of software. The processor 901, A01 may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field-programmable gate array or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. It can implement or execute the various methods, steps and logic block diagrams disclosed in the embodiments of the present invention. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc. The steps of the method disclosed in combination with the embodiments of the present invention can be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of the hardware and software modules in the decoding processor.

[0179] Those skilled in the art should understand that the embodiments of the present invention can be provided as a method, a system, or a computer program product. Therefore, the present invention can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. In a typical configuration, the device of the present application includes one or more processors (CPUs), an input / output user interface, a network interface, and a memory.

[0180] In addition, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk memory, CD-ROM, optical memory, etc.) that contain computer-usable program code.

[0181] Therefore, the present application also proposes a computer-readable medium, on which a computer program is stored, and when the computer program is executed by a processor, it implements the steps of the method described in any one of the embodiments of the present application. For example, the memories 803, 902, A02 of the present invention may include non-permanent memories in the computer-readable medium, in the form of random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash memory (flash RAM).

[0182] A computer-readable medium includes permanent and non-permanent, removable and non-removable media that can implement information storage by any method or technology. The information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory, or other memory technologies, compact disc read-only memory (CD-ROM), digital versatile disc (DVD), or other optical storage, magnetic cassette tapes, magnetic tape magnetic disk storage, or other magnetic storage devices, or any other non-transitory media that can be used to store information accessible by a computing device. As defined herein, a computer-readable medium does not include transitory computer-readable media, such as modulated data signals and carrier waves.

[0183] Based on Figures 6 - 11 In an embodiment, the present application further provides a mobile communication system, including at least one embodiment of any intermediate device in the present application and / or at least one embodiment of any network device in the present application. Further, the mobile communication system further includes at least one embodiment of any terminal device in the present application.

[0184] It should also be noted that the term "including", "comprising", or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "including one..." does not exclude the existence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0185] It should also be noted that the "first" and "second" in the present application are used to distinguish multiple objects with the same name and are not used to limit the order or size. Without specific description, there is no other special meaning.

[0186] The above are only embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

1. A broadcast signaling indication method for use in a wireless communication system, where the wireless communication system includes a network device, an intermediate device, and a terminal device; a service signal sent by the network device directly reaches the terminal device or is reflected to the terminal device via the intermediate device, characterized in that the method Including: The first downlink signaling for scheduling the system message of the intermediate device; The second downlink signaling for scheduling the system message of the terminal device; Making the system information scheduled for the intermediate device different from the system information scheduled for the terminal, saving the energy consumption of the intermediate device and reducing the introduced system overhead; Wherein, the scrambling identifier of the first downlink signaling is different from the scrambling identifier of the second downlink signaling, and / or, The control channel set of the first downlink signaling is different from the control channel set of the second downlink signaling, and / or, The search space of the first downlink signaling is different from the search space of the second downlink signaling.

2. The broadcast signaling indication method according to claim 1, wherein The frequency domain position of the control channel set where the first downlink signaling is located is obtained by combining the frequency domain position of the search space of the second downlink signaling with frequency domain offset information or is pre-configured.

3. The broadcast signaling indication method according to claim 1, characterized in that, The time domain position of the control channel set where the first downlink signaling is located is obtained by combining the time domain position of the search space of the second downlink signaling with time domain offset information or is pre-configured.

4. The broadcast signaling indication method according to claim 1, characterized in that, The identifier includes a first identifier dedicated to the intermediate device, and / or, the identifier includes a second identifier dedicated to the terminal device.

5. The broadcast signaling indication method according to claim 1, characterized in that The third downlink signaling is used to change the system information of the intermediate device; the third downlink signaling occupies the reserved bits of the downlink control signaling for the terminal.

6. The broadcast signaling indication method according to any one of claims 1 to 5, for a network device, characterized in that, Including the following steps: Determine the identifier and the system message, Scramble the downlink physical control channel with the identifier and send the first downlink signaling and / or the second downlink signaling.

7. The broadcast signaling indication method according to claim 6, wherein It further includes the following steps: Send a paging identifier-scrambled third downlink signaling, which is used for the system information change of the wireless intermediate device; the third downlink signaling occupies the reserved bits of the downlink control signaling for the terminal to distinguish it from the terminal's acquisition of system information change.

8. The broadcast signaling indication method according to any one of claims 1 to 5, which is used for an intermediate device, is characterized in that Including the following steps: Descramble the downlink control channel with the first identifier and receive the first downlink signaling; Obtain the system message for the intermediate device according to the indication of the first downlink signaling.

9. The broadcast signaling indication method according to claim 8, wherein It further includes the following steps: The intermediate device detects the paging identifier-scrambled third downlink signaling to obtain the system information change for the wireless intermediate device; the third downlink signaling occupies the reserved bits of the downlink control signaling for the terminal to distinguish it from the terminal's acquisition of system information change.

10. The broadcast signaling indication method according to any one of claims 1 to 5, for a terminal device, characterized in that, Including the following steps: Descramble the downlink control channel with the second identifier and receive the second downlink signaling; Obtain the system message for the terminal device according to the indication of the second downlink signaling.

11. A network device for implementing the method according to any one of claims 1 to 7, characterized in that, At least one module in the network device is used for at least one of the following functions: determining the control channel set and / or the search space; determining the scrambling identifier; sending the first downlink signaling and / or the second downlink signaling.

12. An intermediate device for implementing the method according to any one of claims 1 to 5, 8 to 9, characterized in that, At least one module in the intermediate device is used for at least one of the following functions: determining the control channel set and / or the search space for the intermediate device; descrambling the downlink control channel with the first identifier and receiving the first downlink signaling; obtaining the system message for the intermediate device according to the indication of the first downlink signaling.

13. A terminal device for implementing the method according to any one of claims 1 to 5 and 10, characterized in that, At least one module in the terminal device is configured to perform at least one of the following functions: determining a set of control channels and / or search spaces for the terminal device; descrambling a downlink control channel using a second identifier and receiving the second downlink signaling; and obtaining a system message for the intermediate device according to an indication of the second downlink signaling.

14. A terminal device, characterized in that, Comprising: A memory, a processor, and a computer program stored on the memory and executable on the processor, where the computer program, when executed by the processor, implements the steps of the method according to any one of claims 1 to 10.

15. A computer-readable medium, characterized in that, A computer program is stored on the computer-readable medium, and when the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 10 are implemented.

16. A mobile communication system, characterized in that, Comprising at least one network device as claimed in claim 11 and / or at least one intermediate device as claimed in claim 12.

17. A mobile communication system, characterized in that, Further comprising at least one terminal device as claimed in claim 13.

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