Transmission Method of Physical Broadcast Channel and Related Devices

Abstract

The present application provides a method for transmitting a broadcast channel and related devices. The method includes: a network device determines downlink bandwidth configuration information corresponding to a terminal device; the network device, according to the downlink bandwidth configuration information, sends a first physical broadcast channel to the terminal device in subframes obtained from multiple cells, and the time interval between every two adjacent subframes obtained from the multiple cells is greater than or equal to 30 ms; when the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than or equal to a first threshold, at least one first subframe obtained from a cell exists in the subframes obtained from the multiple cells for sending the first physical broadcast channel, and the first subframe obtained from a cell is used to transmit at least 5 symbols of the first physical broadcast channel.

Description

Technical Field

[0001] This application relates to the field of wireless communication technologies, and in particular, to a method for transmitting a physical broadcast channel and related devices. Background Art

[0002] The 3rd Generation Partnership Project (3GPP) introduced Multimedia Broadcast Multicast Service (MBMS) to achieve point-to-multipoint data transmission and improve the utilization rate of air interface resources. In LTE, the Physical Multicast Channel (PMCH) is defined for data transmission of MBMS services. The MBMS service uses Multimedia Broadcast multicast service Single Frequency Network (MBSFN) to jointly transmit MBMS signals on the same time domain, frequency domain, and spatial domain resources through multiple mutually synchronized cells, and then naturally forms the merging of multi-cell signals in the air, improving the Signal to Interference plus Noise Ratio (SINR) on the UE side.

[0003] For an MBMS dedicated cell, there is at least one non-MBSFN subframe every 40 ms, which is used to transmit the Primary Synchronization Signal (PSS), Secondary Synchronization Signal (SSS), Physical Broadcast Channel (PBCH), Physical Control Format Indicator Channel (PCFICH), Physical Downlink Control Channel (PDCCH), Physical Downlink Shared Channel (PDSCH), etc. This subframe is called the Cell Acquisition Subframe (CAS). The physical channels or signals in the CAS subframe cannot be combined with signals from multiple cells, resulting in a lower SINR of the physical channels in the CAS subframe received by the UE than the SINR of the PMCH signal in the MBSFN subframe. When the channel condition is poor, the SINR of the physical channel (such as PBCH) in the CAS subframe received by the UE is lower than the demodulation threshold, and the blind detection of PBCH fails, resulting in the UE being unable to receive PBCH normally. Summary of the Invention

[0004] The present application provides a method for transmitting a physical broadcast channel and related devices, which can improve the probability that a terminal device successfully receives the PBCH in an MBMS dedicated cell.

[0005] In a first aspect, an embodiment of the present application provides a method for transmitting a physical broadcast channel, including:

[0006] The network device sends a signal for the terminal device to access on a broadcast dedicated carrier;

[0007] The network device sends a first physical broadcast channel to the terminal device in multiple cell acquisition subframes, and the time interval between every two adjacent cell acquisition subframes in the multiple cell acquisition subframes is greater than or equal to 30 ms; at least one first cell acquisition subframe exists in the multiple cell acquisition subframes for transmitting the first physical broadcast channel, and the first cell acquisition subframe is used to transmit at least 5 symbols of the first physical broadcast channel.

[0008] In the technical solution of the embodiment of the present application, the network device sends the first physical broadcast channel in multiple subframes of a cell, and repeats sending the first physical broadcast channel in at least one cell acquisition subframe among the multiple cell acquisition subframes used for sending the first physical broadcast channel. In this way, the network device can increase the transmission probability of the first physical broadcast channel by repeating the transmission of the first physical broadcast channel in the cell acquisition subframe, thereby increasing the probability that the terminal device receives the first physical broadcast channel.

[0009] In some embodiments, before the network device sends the first physical broadcast channel to the terminal device in multiple cell acquisition subframes, the method further includes:

[0010] The network device determines the downlink bandwidth configuration information of the carrier or the cell;

[0011] The network device sending the first physical broadcast channel to the terminal device in multiple cell acquisition subframes includes:

[0012] The network device sends the first physical broadcast channel to the terminal device in the multiple cell acquisition subframes according to the downlink bandwidth configuration information. When the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than or equal to a first threshold, at least one of the multiple cell acquisition subframes is the first cell acquisition subframe.

[0013] In this way, when the bandwidth configuration value corresponding to the bandwidth configuration information is greater than the first threshold, the first physical broadcast channel is repeatedly sent in the cell acquisition subframe, which can avoid a small number of resource elements (REs) for transmitting the Physical Downlink Shared Channel (PDSCH) caused by repeatedly sending the first physical broadcast channel in the cell acquisition subframe when the bandwidth is small.

[0014] In some embodiments, when the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than the first threshold and less than a second threshold, at least one of the multiple cell acquisition subframes is not the first cell acquisition subframe, and the second threshold is greater than the first threshold. In this way, when the bandwidth configuration value corresponding to the bandwidth configuration information is greater than the first threshold and less than the second threshold, the first physical broadcast channel is repeatedly sent in some cell acquisition subframes, which can not only increase the probability that the terminal device receives the first physical broadcast channel, but also avoid a small number of REs for transmitting the PDSCH caused by repeatedly sending the first physical broadcast channel in the cell acquisition subframe when the bandwidth is small.

[0015] In some embodiments, when the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than the second threshold, and the second threshold is greater than the first threshold, all of the multiple cell acquisition subframes are the first cell acquisition subframes. In this way, when the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than the second threshold, that is, when the bandwidth value is large enough, repeating the transmission of the first physical broadcast channel within each cell acquisition subframe can more effectively increase the probability that the terminal device receives the first physical broadcast channel.

[0016] In some embodiments, when the bandwidth configuration value corresponding to the downlink bandwidth configuration information is equal to the second threshold, among the multiple cell acquisition subframes, at least one cell acquisition subframe is not the first cell acquisition subframe, or all of the multiple cell acquisition subframes are the first cell acquisition subframes.

[0017] In some embodiments, before the network device sends the first physical broadcast channel to the terminal device in multiple cell acquisition subframes, the method further includes: the network device sends a second physical broadcast channel to the terminal device, the second physical broadcast channel carries master information block multimedia broadcast multicast service information, and the master information block multimedia broadcast multicast service information includes the downlink bandwidth configuration information. In this way, the terminal device can obtain the master information block multimedia broadcast multicast service information carried by the second physical broadcast channel and obtain the downlink bandwidth configuration information in the master information block multimedia broadcast multicast service information.

[0018] In a second aspect, an embodiment of the present application provides a method for transmitting a physical broadcast channel, including:

[0019] The terminal device accesses a broadcast dedicated carrier;

[0020] The terminal device receives the first physical broadcast channel sent by the network device in multiple cell acquisition subframes, and the time interval between every two adjacent cell acquisition subframes among the multiple cell acquisition subframes is greater than or equal to 30 ms; at least one of the multiple cell acquisition subframes for sending the first physical broadcast channel is a first cell acquisition subframe, and the first cell acquisition subframe is used to transmit at least 5 symbols of the first physical broadcast channel.

[0021] In the technical solution of the embodiment of the present application, the network device sends the first physical broadcast channel in multiple cell subframes, and repeats the transmission of the first physical broadcast channel in at least one cell acquisition subframe among the multiple cell acquisition subframes for sending the first physical broadcast channel. In this way, the terminal can increase the transmission probability of the first physical broadcast channel by repeatedly receiving the first physical broadcast channel in the cell acquisition subframe, thereby increasing the probability that the terminal device receives the first physical broadcast channel.

[0022] In some embodiments, before the terminal device receives the first physical broadcast channel sent by the network device in the subframes for multiple cell acquisitions, the method further includes:

[0023] The terminal device determines downlink bandwidth configuration information;

[0024] The terminal device receiving the first physical broadcast channel sent by the network device in the subframes for multiple cell acquisitions includes:

[0025] The terminal device receives the first physical broadcast channel in the subframes for multiple cell acquisitions according to the downlink bandwidth configuration information. When the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than or equal to a first threshold, at least one of the subframes for multiple cell acquisitions is a first cell acquisition subframe.

[0026] In this way, when the bandwidth configuration value corresponding to the bandwidth configuration information is greater than the first threshold, the first physical broadcast channel is repeatedly transmitted in the cell acquisition subframe, which can avoid a small number of resource elements (REs) for transmitting the Physical Downlink Shared Channel (PDSCH) caused by repeatedly transmitting the first physical broadcast channel in the cell acquisition subframe when the bandwidth is small.

[0027] In some embodiments, when the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than the first threshold and less than a second threshold, at least one of the subframes for multiple cell acquisitions is not a first cell acquisition subframe, and the second threshold is greater than the first threshold. In this way, when the bandwidth configuration value corresponding to the bandwidth configuration information is greater than the first threshold and less than the second threshold, the first physical broadcast channel is repeatedly transmitted in some of the cell acquisition subframes, which can not only increase the probability that the terminal device receives the first physical broadcast channel, but also avoid a small number of REs for transmitting the PDSCH caused by repeatedly transmitting the first physical broadcast channel in the cell acquisition subframe when the bandwidth is small.

[0028] In some embodiments, when the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than the second threshold, all of the subframes for multiple cell acquisitions are first cell acquisition subframes. In this way, when the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than the second threshold, that is, when the bandwidth value is large enough, the first physical broadcast channel is repeatedly sent in each cell acquisition subframe, which can more effectively increase the probability that the terminal device receives the first physical broadcast channel.

[0029] In some embodiments, when the bandwidth configuration value corresponding to the downlink bandwidth configuration information is equal to the second threshold, at least one of the subframes for multiple cell acquisitions is not a first cell acquisition subframe, or all of the subframes for multiple cell acquisitions are first cell acquisition subframes.

[0030] In some embodiments, before the network device sends a first physical broadcast channel to the terminal device in multiple cell acquisition subframes according to the downlink bandwidth configuration information, the method further includes: the terminal device receives the second physical broadcast channel sent by the network device, the second physical broadcast channel carries master information block multimedia broadcast multicast service information, and the master information block multimedia broadcast multicast service information includes the downlink bandwidth configuration information. In this way, the terminal device can obtain the master information block multimedia broadcast multicast service information carried by the second physical broadcast channel and obtain the downlink bandwidth configuration information in the master information block multimedia broadcast multicast service information.

[0031] In a third aspect, an embodiment of the present application provides a network device, including:

[0032] A signal sending module, configured to send a signal for the terminal device to access on a broadcast dedicated carrier;

[0033] A channel sending module, configured to send a first physical broadcast channel to the terminal device in multiple cell acquisition subframes, where the time interval between every two adjacent cell acquisition subframes in the multiple cell acquisition subframes is greater than or equal to 30 ms; at least one first cell acquisition subframe exists in the multiple cell acquisition subframes for sending the first physical broadcast channel, and the first cell acquisition subframe is used to transmit at least 5 symbols of the first physical broadcast channel.

[0034] In some embodiments, the network device further includes:

[0035] A bandwidth configuration determination module, configured to determine the downlink bandwidth configuration information of the carrier or the cell;

[0036] The channel sending module is specifically configured to:

[0037] According to the downlink bandwidth configuration information, send the first physical broadcast channel to the terminal device in the multiple cell acquisition subframes, and when the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than or equal to a first threshold, at least one of the first cell acquisition subframes exists in the multiple cell acquisition subframes.

[0038] In some embodiments, when the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than the first threshold and less than a second threshold, at least one of the cell acquisition subframes in the multiple cell acquisition subframes is not the first cell acquisition subframe, and the second threshold is greater than the first threshold.

[0039] In some embodiments, when the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than the second threshold, all of the multiple cell acquisition subframes are the first cell acquisition subframes, and the second threshold is greater than the first threshold.

[0040] In some embodiments, when the bandwidth configuration value corresponding to the downlink bandwidth configuration information is equal to the second threshold, among the multiple cell acquisition subframes, at least one cell acquisition subframe is not the first cell acquisition subframe, or all of the multiple cell acquisition subframes are the first cell acquisition subframes.

[0041] In some embodiments, the network device further includes:

[0042] A bandwidth configuration information sending module, configured to send a second physical broadcast channel to the terminal device, where the second physical broadcast channel carries master information block multimedia broadcast multicast service information, and the master information block multimedia broadcast multicast service information includes the downlink bandwidth configuration information.

[0043] In a fourth aspect, an embodiment of the present application provides a terminal device, including:

[0044] An access module, configured to access a broadcast dedicated carrier;

[0045] A channel receiving module, configured to receive a first physical broadcast channel sent by the network device within multiple cell acquisition subframes, where a time interval between every two adjacent cell acquisition subframes among the multiple cell acquisition subframes is greater than or equal to 30 ms; at least one of the multiple cell acquisition subframes for sending the first physical broadcast channel is a first cell acquisition subframe, and the first cell acquisition subframe is used to transmit at least 5 symbols of the first physical broadcast channel.

[0046] In some embodiments, the terminal device further includes:

[0047] A configuration information determining module, configured to determine downlink bandwidth configuration information;

[0048] The channel receiving module is specifically configured to:

[0049] Receive the first physical broadcast channel within the multiple cell acquisition subframes according to the downlink bandwidth configuration information. When the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than or equal to a first threshold, at least one of the multiple cell acquisition subframes is the first cell acquisition subframe.

[0050] In some embodiments, when the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than the first threshold and less than the second threshold, among the multiple cell acquisition subframes, at least one cell acquisition subframe is not the first cell acquisition subframe, and the second threshold is greater than the first threshold.

[0051] In some embodiments, when the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than the second threshold, all of the multiple cell acquisition subframes are the first cell acquisition subframes.

[0052] In some embodiments, when the bandwidth configuration value corresponding to the downlink bandwidth configuration information is equal to the second threshold, among the multiple cell acquisition subframes, at least one cell acquisition subframe is not the first cell acquisition subframe, or all of the multiple cell acquisition subframes are the first cell acquisition subframes.

[0053] In some embodiments, the terminal device further includes:

[0054] A bandwidth configuration information acquisition module, configured to receive a second physical broadcast channel sent by a network device, where the second physical broadcast channel carries master information block multimedia broadcast multicast service information, and the master information block multimedia broadcast multicast service information includes the downlink bandwidth configuration information.

[0055] In a fifth aspect, an embodiment of the present application provides a network device, including a processor and a memory, where the memory stores computer instructions; the processor executes the computer instructions stored in the memory, so that the network device executes the method according to any one of the embodiments in the first aspect above.

[0056] In a sixth aspect, an embodiment of the present application provides a terminal device, including a processor and a memory, where the memory stores computer instructions; the processor executes the computer instructions stored in the memory, so that the terminal device executes the method according to any one of the embodiments in the second aspect above.

[0057] In a seventh aspect, an embodiment of the present application provides a computer-readable storage medium, where computer instructions are stored in the computer-readable storage medium, and the computer instructions instruct a network device to execute the method according to any one of the embodiments in the first aspect above.

[0058] In an eighth aspect, an embodiment of the present application provides a computer-readable storage medium, where computer instructions are stored in the computer-readable storage medium, and the computer instructions instruct a terminal device to execute the method according to any one of the embodiments in the second aspect above. Description of the Drawings

[0059] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings required for the embodiments will be briefly introduced below.

[0060] Figure 1 It is a network architecture diagram of the network system related to the embodiments of the present application.

[0061] Figure 2 It is a schematic flowchart of the transmission method of the physical broadcast channel in the embodiments of the present application;

[0062] Figure 3 It is a schematic diagram of the scenario related to the transmission method of the physical broadcast channel in the embodiments of the present application;

[0063] Figure 4 It is another schematic diagram of the scenario related to the transmission method of the physical broadcast channel in the embodiments of the present application;

[0064] Figure 5 It is yet another schematic diagram of the scenario related to the transmission method of the physical broadcast channel in the embodiments of the present application;

[0065] Figure 6 It is still another schematic diagram of the scenario related to the transmission method of the physical broadcast channel in the embodiments of the present application;

[0066] Figure 7 It is another schematic flowchart of the transmission method of the physical broadcast channel in the embodiments of the present application;

[0067] Figure 8 It is a schematic diagram of the modules of the network device in the embodiments of the present application;

[0068] Figure 9 It is a schematic diagram of the modules of the terminal device in the embodiments of the present application;

[0069] Figure 10 It is a schematic structural diagram of the network device in the embodiments of the present application;

[0070] Figure 11 It is a schematic structural diagram of the terminal device in the embodiments of the present application. Detailed implementation manners

[0071] The technical solutions in the embodiments of the present application will be clearly and elaborately described below with reference to the accompanying drawings. Among them, in the description of the embodiments of the present application, unless otherwise specified, " / " means "or". For example, A / B can represent A or B; "and / or" in the text is only a description of the association relationship between associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of the present application, "a plurality of" means two or more than two.

[0072] Hereinafter, the terms "first" and "second" are only used for descriptive purposes and should not be construed as implying or suggesting relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0073] Please refer to Figure 1 , Figure 1 which is a network architecture diagram of the network system 100 provided by the embodiments of the present application. As Figure 1 shown, the network system 100 includes a network device 10 and one or more terminal devices 20.

[0074] The network device 10 is, for example, a device for transmitting and receiving signals. The network device 10 may be, for example, but not limited to, a base station. The terminal device is a device for a user on the user side to receive signals. The terminal device may be, for example, but not limited to, a mobile phone, a laptop computer, a tablet computer, a large-screen TV, and other terminal devices.

[0075] Please refer to Figure 2 , Figure 2 which is a schematic flowchart of the transmission method of the physical broadcast channel according to the embodiments of the present application. The transmission method of the physical broadcast channel according to the embodiments of the present application can be used for, but not limited to, MBMS dedicated cells. The transmission method of the physical broadcast channel includes:

[0076] 201. The network device sends a signal for the terminal device to access on a broadcast dedicated carrier to the terminal device.

[0077] Before the network device sends the physical broadcast channel to the terminal device, it needs to first send a signal for the terminal device to access the broadcast dedicated carrier to the terminal device, so that the terminal accesses the broadcast dedicated carrier according to this signal.

[0078] Specifically, this signal may be a synchronization signal. The network device sends a synchronization signal to the terminal device, and the synchronization signal is used to indicate the terminal to access the broadcast dedicated carrier.

[0079] 202. The terminal device receives this signal and accesses the broadcast dedicated carrier according to this signal.

[0080] 203. The network device sends a first physical broadcast channel to the terminal device in subframes obtained from multiple cells, and the time interval between every two adjacent subframes obtained from multiple cells is greater than or equal to 30 ms.

[0081] The multiple cell acquisition subframes for transmitting the first physical broadcast channel may be consecutive multiple cell acquisition subframes, and the information carried by the first physical broadcast channel transmitted within each cell acquisition subframe is the same. In this way, the terminal device can receive the first physical broadcast channel within consecutive multiple cell acquisition subframes, so that the terminal can receive the first physical broadcast channel faster and improve the efficiency of the terminal device receiving the physical broadcast channel.

[0082] The interval between two adjacent cell acquisition subframes can be, for example, 40 ms, so that there are 4 cell acquisition subframes within every 160 ms.

[0083] As Figure 3 shown, the multiple cell acquisition subframes for transmitting the physical broadcast channel are the cell acquisition subframes in wireless frames whose system frame numbers are integer multiples of 4. Then, the multiple cell acquisition subframes for transmitting the first physical broadcast channel can be the cell acquisition subframes in wireless frames with system frame numbers 0, 4, 8, and 12 respectively. It can be understood that the cell acquisition subframes in the subsequent wireless frames with system frame numbers 16, 20, 24, and 28 can be used to transmit the third physical broadcast channel. The symbols included in the third physical broadcast channel are different from those of the first physical broadcast channel.

[0084] As Figure 4 shown, the multiple cell acquisition subframes for transmitting the physical broadcast channel can be subframes whose subframe numbers are integer multiples of 14. Then, the multiple cell acquisition subframes for transmitting the first physical broadcast channel can be subframes with subframe numbers 0, 14, 28, and 42 respectively. It can be understood that the subsequent subframes with subframe numbers 56, 70, 84, and 98 are used to transmit the third physical broadcast channel. The symbols included in the third physical broadcast channel are different from those of the first physical broadcast channel.

[0085] As Figure 5 shown, the multiple cell acquisition subframes for transmitting the physical broadcast channel can be subframes whose slot numbers of the subframe are integer multiples of 14. Then, the multiple cell acquisition subframes for transmitting the first physical broadcast channel can be subframes with slot numbers 0, 14, 28, and 42 respectively. It can be understood that the subsequent subframes with slot numbers 56, 70, 84, and 98 are used to transmit the third physical broadcast channel. The symbols included in the third physical broadcast channel are different from those of the first physical broadcast channel.

[0086] It should be noted that the first physical broadcast channel is any physical broadcast channel sent by the network device to the terminal device. The cell acquisition subframes for transmitting the physical broadcast channel are not limited to the subframes in the above examples, and can also be other subframes. The above subframes are only used for explanation and do not constitute a limitation to this application.

[0087] In the embodiments of the present application, the length of a radio frame may be 40 ms, or each radio frame includes 14 subframes, or each radio frame includes 14 time slots, or each radio frame includes 15 time slots.

[0088] Optionally, the subframe number and the time slot number may be independently counted within each radio frame. For example, the subframe numbers of the subframes included in radio frame 0 are sequentially 0, 1, 2, 3, 4... 13, and the subframe numbers of the subframes included in radio frame 1 are sequentially 0, 1, 2, 3, 4... 13. The subframe number and the time slot number may also be continuously counted between radio frames. For example, the subframe numbers of the subframes included in radio frame 0 are sequentially 0, 1, 2, 3, 4... 13, and the subframe numbers of the subframes included in radio frame 1 are sequentially 14, 15, 16, 17, 18... 27.

[0089] When there are multiple network devices in a network system, the symbol positions of the repeated symbols corresponding to the 4 symbols of the physical broadcast channel in the subframes with the same subframe number are different for different network devices. Specifically, as Figure 6 shown, symbols 7, 8, 9, and 10 respectively correspond to the original symbol positions where the physical broadcast channel does not perform in-subframe repeated transmission. Symbols 3, 4, 11, 12, and 13 can be used for the repeated transmission of the physical broadcast channel within the subframe. The mapping relationship between the original symbols 7, 8, 9, and 10 of the physical broadcast channel and the repeated symbols 3, 4, 11, 12, and 13 of the physical broadcast channel is related to the cell identification (ID) of the network device. For example, for a network device with a cell identification of 0, the original PBCH symbol 7 can be mapped to symbol 4 for repeated transmission, the original PBCH symbol 8 can be mapped to symbol 11 for repeated transmission, the original PBCH symbol 9 can be mapped to symbols 3 and 12 for repeated transmission, and the original PBCH symbol 10 can be mapped to symbol 13 for repeated transmission; for a network device with a cell identification of 1, the original PBCH symbol 7 can be mapped to symbol 4 for repeated transmission, the original PBCH symbol 8 can be mapped to symbol 11 for repeated transmission, the original PBCH symbol 9 can be mapped to symbols 3 and 13 for repeated transmission, and the original PBCH symbol 10 can be mapped to symbol 12 for repeated transmission.

[0090] Among the multiple cell acquisition subframes for transmitting the first physical broadcast channel, there is at least one first cell acquisition subframe, and the first cell acquisition subframe uses at least 5 symbols to transmit the first physical broadcast channel. The first physical broadcast channel is mapped on 4 symbols. The first cell acquisition subframe is used to transmit at least 5 symbols of the first physical broadcast channel, which can be understood as that the first cell acquisition subframe is a cell acquisition subframe for repeatedly transmitting the first physical broadcast channel. Repeatedly transmitting the first physical broadcast channel can be understood as transmitting the first physical broadcast channel at least twice in the first cell acquisition subframe.

[0091] The network device determines, according to the agreed selection method for obtaining subframes in the first cell of the terminal device, which specific one or which specific several cell acquisition subframes among the multiple cell acquisition subframes for transmitting the first physical broadcast channel are the first cell acquisition subframes. The terminal device can determine the first cell acquisition subframe according to the agreed selection method with the network device, and repeatedly receive the first physical broadcast channel on the first cell acquisition subframe, while on other subframes that are not the first cell acquisition subframes, only receive the first physical broadcast channel once.

[0092] The agreed selection method can be, for example, the requirements that the subframe number of the first cell acquisition subframe needs to meet, or the requirements that the system frame number of the radio frame where the first cell acquisition subframe is located needs to meet, or the requirements that the time slot number of the subframe where the first cell acquisition subframe is located needs to meet. The agreed selection method for the first cell acquisition subframe is not limited here.

[0093] For example, in Figure 3 In the example shown, the network device can determine, according to the agreed selection method, that the cell acquisition subframes in the radio frame with system frame number 4 and the cell acquisition subframes in the radio frame with system frame number 12 are the first cell acquisition subframes. In this way, the network device sends the first physical channel to the terminal device in the cell acquisition subframes of the radio frames with system frame numbers 0, 4, 8, and 12 respectively, and repeats sending the symbols of the first physical channel in the cell acquisition subframe of the radio frame with system frame number 4, and repeats sending the symbols of the first physical channel in the cell acquisition subframe of the radio frame with system frame number 12.

[0094] Another example, in Figure 4 In the example shown, the network device can determine, according to the agreed selection method, that the subframes with subframe numbers 14 and 42 are the first cell acquisition subframes. The network device can transmit the first physical channel in the cell acquisition subframes with subframe numbers 0, 14, 28, and 42 respectively, and repeat transmitting the symbols of the first physical channel on the cell acquisition subframe with subframe number 14, and repeat transmitting the symbols of the first physical channel on the cell acquisition subframe with subframe number 42.

[0095] 204. The terminal device receives the first physical broadcast channel in multiple cell acquisition subframes.

[0096] The terminal device can determine the first cell acquisition subframe among the multiple cell acquisition subframes for transmitting the first physical broadcast channel according to the agreed selection method. Then, the terminal device repeatedly receives the first physical broadcast channel in the first cell acquisition subframe, and only receives the first physical broadcast channel once in other cell acquisition subframes that are not the first cell acquisition subframes.

[0097] For example, the same as the above Figure 3Corresponding to the example, the terminal device determines, according to the agreed selection method, that the cell acquisition subframes in the radio frames with system frame numbers 4 and 12 are the first cell acquisition subframes. In this way, the terminal device sends the first physical channel to the terminal device in the cell acquisition subframes of the radio frames with system frame numbers 0, 4, 8, and 12 respectively, and repeats sending the symbols of the first physical channel in the cell acquisition subframe of the radio frame with system frame number 4, and repeats sending the symbols of the first physical channel in the cell acquisition subframe of the radio frame with system frame number 12.

[0098] For another example, corresponding to the above Figure 4 example, the terminal device determines, according to the agreed selection method, that the subframes with subframe numbers 14 and 42 are the first cell acquisition subframes. The terminal device can receive the first physical channel in the cell acquisition subframes with subframe numbers 0, 14, 28, and 42 respectively, and repeats receiving the symbols of the first physical channel on the cell acquisition subframe with subframe number 14, and repeats receiving the symbols of the first physical channel on the cell acquisition subframe with subframe number 42.

[0099] In the technical solution of the embodiment of the present application, the network device sends the first physical broadcast channel in multiple cell subframes, and repeats sending the first physical broadcast channel in at least one of the multiple cell acquisition subframes used for sending the first physical broadcast channel. In this way, the network device can increase the transmission probability of the first physical broadcast channel by repeating sending the first physical broadcast channel within the subframe, so as to increase the probability that the terminal device receives the first physical broadcast channel.

[0100] Please refer to Figure 7 , Figure 7 which is another schematic flowchart of the transmission method of the physical broadcast channel of the present application. The transmission method of the physical broadcast channel includes:

[0101] 701. The network device sends a signal for the terminal device to access on the broadcast dedicated carrier to the terminal device.

[0102] 702. The terminal device receives the signal and accesses the broadcast dedicated carrier according to the signal.

[0103] 703. The network device determines the downlink bandwidth configuration information of the broadcast dedicated carrier;

[0104] The network device can obtain the carrier corresponding to the terminal device or the bandwidth configuration information of the serving cell of the terminal device. The network device can determine the transmission strategy for sending the physical broadcast channel to the terminal device according to the downlink bandwidth configuration information corresponding to the terminal device.

[0105] The downlink bandwidth information includes the bandwidth configuration value N_RB^DL. There is a one-to-one positive correlation between the bandwidth configuration value and the system bandwidth value. For example, when the bandwidth configuration value is 6, the corresponding bandwidth value is 1.4 MHz; when the bandwidth configuration value is 15, the corresponding bandwidth value is 3 MHz; when the bandwidth configuration value is 25, the corresponding bandwidth value is 5 MHz; when the bandwidth configuration value is 50, the corresponding bandwidth value is 10 MHz; when the bandwidth configuration value is 75, the corresponding bandwidth value is 15 MHz; when the bandwidth configuration value is 100, the corresponding bandwidth value is 20 MHz.

[0106] Preferably, after determining the downlink bandwidth configuration information corresponding to the terminal device, the network device may send the downlink bandwidth configuration information to the terminal device, so that the terminal device can obtain the downlink bandwidth configuration information and determine the receiving strategy of the physical broadcast channel according to the downlink bandwidth configuration information.

[0107] Specifically, the network device sends a second physical broadcast channel to the terminal device. The second physical broadcast channel carries the master information block multimedia broadcast multicast service (MIB-MBMS) information. The MIB-MBMS information includes the downlink bandwidth configuration information.

[0108] The network device may repeatedly send the second physical broadcast channel on the subframes obtained in one cell; or may separately send the second physical broadcast channel on the subframes obtained in multiple cells; or may separately send the second physical broadcast channel on the subframes obtained in multiple cells, and on the subframes obtained in at least one cell, repeatedly send the second physical broadcast channel. Repeatedly sending the second physical broadcast channel means that on the subframes obtained in the cell, at least 5 symbols are used to transmit the second broadcast channel. The symbols of the second physical broadcast channel may be distributed on different frames, and / or subframes, and / or time slots. For example, the network device may send the second physical broadcast channel to the terminal device in one or more subframes among the subframes with system frame numbers 0, 4, 8, and 12, such as subframe 0. The network device may also send the second physical broadcast channel to the terminal device in each of the subframes with system frame numbers 0, 4, 8, and 12, and repeat the symbols of the second physical broadcast channel in the subframe with system frame number 0. In this way, the probability that the terminal device successfully receives the second physical broadcast channel can be increased, and the MIB-MBMS information in the second physical broadcast channel can be obtained.

[0109] It should be noted that the above step 703 may be executed before step 701, may be executed after step 701 and before step 702, may also be executed after step 702, or may be executed simultaneously with step 701 or step 702.

[0110] 704. The terminal device determines the downlink bandwidth configuration information of the broadcast dedicated carrier;

[0111] Correspondingly, the terminal device can receive the downlink bandwidth configuration information sent by the network device to obtain the downlink bandwidth configuration information. Specifically, the terminal device obtains the second physical broadcast channel on the subframe from at least one cell. The second physical broadcast channel carries MIB-MBMS information, and the MIB-MBMS information includes the downlink bandwidth configuration information. In this way, the terminal can obtain the downlink bandwidth configuration information from the second physical broadcast channel.

[0112] The terminal device can perform blind detection on the second physical broadcast channel in one or more of a predefined frame, subframe, time slot, symbol, RB, and RE. For example, the terminal device can perform blind detection on symbol 0, and / or symbol 1, and / or symbol 2, and / or symbol 3 in time slot 1 of subframe 0 in radio frame 0, and / or radio frame 4, and / or radio frame 7, and / or radio frame 12 to obtain the second physical broadcast channel, so as to obtain the MIB-MBMS information carried in the second physical broadcast channel. Specifically, the terminal device can obtain the downlink bandwidth configuration information of the broadcast dedicated carrier in the MIB-MBMS information. The bandwidth configuration value in the downlink bandwidth configuration information can be, but is not limited to, one of 6, 15, 25, 50, 75, and 100.

[0113] 705. The network device sends the first physical broadcast channel to the terminal device in the subframes obtained from multiple cells according to the downlink bandwidth configuration information.

[0114] The explanation of the subframes obtained from multiple cells for transmitting the first physical broadcast channel can refer to the above embodiments. To avoid redundancy, it will not be elaborated here. In the first physical channel, MIB-MBMS information can be carried.

[0115] Specifically, the network device compares the size relationship between the bandwidth configuration value corresponding to the downlink bandwidth configuration information and the first threshold, and then determines the transmission strategy of the first physical broadcast channel according to the size relationship between the bandwidth configuration value corresponding to the downlink bandwidth configuration information and the first threshold. There is a one-to-one corresponding positive correlation between the bandwidth configuration value and the bandwidth value, and the first threshold corresponds to the first bandwidth threshold. The network device can also determine the transmission strategy of the first physical broadcast channel according to the size of the bandwidth value and the first bandwidth threshold.

[0116] When the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than or equal to the first threshold, there is at least one first cell acquisition subframe in the multiple cell acquisition subframes. For the explanation of the first cell acquisition subframe, please refer to the above embodiments. Then, when the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than the first threshold, the transmission strategy of the first physical broadcast channel is that the network device transmits the first physical broadcast channel in the multiple cell acquisition subframes, and in at least one cell acquisition subframe used for transmitting the first physical broadcast channel, the first physical broadcast channel is repeatedly transmitted.

[0117] More specifically, when the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than the first threshold and less than the second threshold, among the multiple cell acquisition subframes for transmitting the first physical broadcast channel, at least one cell acquisition subframe is not the first cell acquisition subframe, and the second threshold is greater than the first threshold. When the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than the second threshold, all of the multiple cell acquisition subframes for transmitting the first physical broadcast channel are the first cell acquisition subframes. That is to say, when the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than the first threshold and less than the second threshold, the transmission strategy of the first physical broadcast channel is that the network device transmits the first physical broadcast channel in multiple cell acquisition subframes, and in some of the cell acquisition subframes used for transmitting the first physical broadcast channel, the first physical broadcast channel is repeatedly transmitted. When the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than the second threshold, the transmission strategy of the first physical broadcast channel is that the network device repeatedly transmits the first physical broadcast channel in each cell acquisition subframe used for transmitting the first physical broadcast channel.

[0118] When the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than the first threshold and less than the second threshold, the network device determines, according to the agreed selection method with the terminal device for the first cell acquisition subframe, which specific cell acquisition subframe or which specific cell acquisition subframes among the multiple cell acquisition subframes for transmitting the first physical broadcast channel are the first acquisition subframes. In this way, when the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than the first threshold and less than the second threshold, the terminal device can determine the first cell acquisition subframe according to the agreed selection method with the network device, and repeatedly receive the first physical broadcast channel on the first cell acquisition subframe, while on other subframes that are not the first cell acquisition subframes, the first physical broadcast channel is only received once.

[0119] Figure 4In the example shown, the cell acquisition subframes for transmitting the first physical broadcast channel include 4 subframes with subframe numbers 0, 14, 28, and 42. When the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than the first threshold and less than the second threshold, the network device may repeatedly transmit the first physical broadcast channel in some of these 4 subframes and transmit the first physical broadcast channel only once in some other subframes. That is, the network device may select 1, 2, or 3 of these 4 subframes as the first cell acquisition subframes according to the agreed selection method, and transmit the first physical broadcast channel at least twice on each first cell acquisition subframe, while on the other subframes that are not the first cell acquisition subframes, transmit the first physical broadcast channel only once. In this way, the terminal device can determine the first cell acquisition subframes according to the agreed method, and repeatedly receive the first physical broadcast channel within the first cell acquisition subframes, while within the other cell acquisition subframes, receive the first physical broadcast channel only once.

[0120] For example, according to the agreed selection method, the network device determines that subframe 0 is the first cell acquisition subframe. The network device repeatedly transmits the first physical broadcast channel within subframe 0, and transmits the first physical broadcast channel only once within subframes 14, 28, and 42 respectively. In this way, the terminal device will also repeatedly receive the first physical broadcast channel only on subframe 0 according to the agreed selection method, and receive the first physical broadcast channel only once within subframes 14, 28, and 42 respectively.

[0121] For another example, according to the agreed selection method, the network device determines that subframe 0 and subframe 28 are the first cell acquisition subframes. The network device repeatedly transmits the first physical broadcast channel on subframe 0, repeatedly transmits the first physical broadcast channel on subframe 28, and on subframes 14 and 42, transmits the first physical broadcast channel only once. In this way, the terminal device will also, according to the agreed selection method, repeatedly receive the first physical broadcast channel on subframe 0, repeatedly receive the first physical broadcast channel on subframe 28, and on subframes 14 and 42, receive the first physical broadcast channel only once.

[0122] For yet another example, according to the agreed selection method, the network device determines that subframe 0, subframe 14, and subframe 28 are the first cell acquisition subframes. The network device repeatedly transmits the first physical broadcast channel within subframe 0, repeatedly transmits the first physical broadcast channel within subframe 14, repeatedly transmits the first physical broadcast channel within subframe 28, and in subframe 42, transmits the first physical broadcast channel only once. In this way, the terminal device will also, according to the agreed selection method, repeatedly receive the first physical broadcast channel within subframe 0, repeatedly receive the first physical broadcast channel within subframe 14, repeatedly receive the first physical broadcast channel within subframe 28, and in subframe 42, receive the first physical broadcast channel only once.

[0123] For another example, according to the agreed selection method, sub-frame No. 14 and sub-frame No. 42 are the sub-frames for the first cell to obtain. The network device repeatedly transmits the first physical broadcast channel on sub-frame No. 14, repeatedly transmits the first physical broadcast channel on sub-frame No. 42, and only transmits the first physical broadcast channel once on sub-frame No. 0 and sub-frame No. 28. In this way, the terminal device will also repeatedly receive the first physical broadcast channel on sub-frame No. 14 according to the agreed selection method, repeatedly receive the first physical broadcast channel on sub-frame No. 42, and only receive the first physical broadcast channel once on sub-frame No. 0 and sub-frame No. 28.

[0124] Continuing with the Figure 4 example shown above, the sub-frames for the cell to obtain for transmitting the first physical broadcast channel include 4 sub-frames with sub-frame numbers 0, 14, 28, and 42. When the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than the second threshold, these 4 sub-frames are all the sub-frames for the first cell to obtain. The network device repeatedly transmits the first physical broadcast channel within each of these 4 sub-frames. That is to say, the network device transmits the first physical broadcast channel at least 2 times within each of these 4 sub-frames.

[0125] The first threshold and the second threshold can be two different positive integers, and the second threshold is greater than the first threshold. Preferably, the first threshold can be, but is not limited to, one of 6, 15, 25, 50, 75, or 100. The second threshold can be, but is not limited to, one of 15, 25, 50, 75, or 100.

[0126] When the bandwidth configuration value corresponding to the downlink bandwidth configuration information is equal to the second threshold, among the multiple sub-frames for the cell to obtain for transmitting the first physical broadcast channel, at least one sub-frame for the cell to obtain is not the sub-frame for the first cell to obtain, the second threshold is greater than the first threshold, or each sub-frame for the cell to obtain for transmitting the first physical broadcast channel is the sub-frame for the first cell to obtain. That is to say, when the bandwidth configuration value corresponding to the downlink bandwidth configuration information is equal to the second threshold, the transmission strategy of the first physical broadcast channel can be the same as the transmission strategy of the first physical broadcast channel when the bandwidth configuration value corresponding to the downlink bandwidth configuration is greater than the second threshold, or can be the same as the transmission strategy of the first physical broadcast channel when the bandwidth configuration value corresponding to the downlink bandwidth configuration is less than the second threshold and greater than the first threshold.

[0127] When the bandwidth configuration value corresponding to the downlink bandwidth configuration information is less than the first threshold, all the cell acquisition subframes for transmitting the first physical broadcast channel are second cell acquisition subframes, and the second cell acquisition subframe can transmit at most 4 symbols of the first physical broadcast channel. That is to say, when the bandwidth configuration value corresponding to the downlink bandwidth configuration information is less than the first threshold, the transmission strategy of the first physical broadcast channel is that the network device only transmits the first physical broadcast channel once in each cell acquisition subframe for transmitting the first physical broadcast channel. It can be understood that the first threshold corresponds to a first bandwidth threshold. When the bandwidth configuration value corresponding to the downlink bandwidth configuration information is less than the first threshold, the bandwidth value of the carrier corresponding to the terminal device or the bandwidth value of the cell served by the terminal device is less than the first bandwidth threshold. In this case, the network device only sends the first physical broadcast channel once on each cell acquisition subframe for sending the first physical cell acquisition subframe. This can avoid a small number of REs for transmitting the PDSCH due to repeated transmission of the physical broadcast channel within a cell acquisition subframe when the bandwidth is small.

[0128] When the bandwidth configuration value corresponding to the downlink bandwidth configuration information is equal to the first threshold, among the multiple cell acquisition subframes for transmitting the first physical broadcast channel, at least one cell acquisition subframe is not the first cell acquisition subframe, or all the multiple cell acquisition subframes for transmitting the first physical broadcast channel are second cell acquisition subframes. That is to say, when the bandwidth configuration value corresponding to the downlink bandwidth configuration information is equal to the first threshold, the transmission strategy of the first physical broadcast channel can be the same as the transmission strategy of the first physical broadcast channel when the bandwidth configuration value corresponding to the downlink bandwidth configuration is greater than the first threshold and less than the second threshold, or can be the same as the transmission strategy of the first physical broadcast channel when the bandwidth configuration value corresponding to the downlink bandwidth configuration is less than the first threshold.

[0129] It should be noted that the transmission strategy of the first physical broadcast channel obtained according to the size relationship between the bandwidth configuration value and the first threshold and the second threshold can also be used to transmit other physical broadcast channels.

[0130] Specifically, the network device can determine the transmission strategy of the physical broadcast channel according to the size relationship between the bandwidth configuration value corresponding to the downlink bandwidth configuration information and the first threshold and the second threshold. There is a positive correlation or a one-to-one correspondence between the bandwidth configuration value and the bandwidth value. The first threshold corresponds to a first bandwidth threshold, and the second threshold corresponds to a second bandwidth threshold. The network device can also determine the transmission strategy of the physical broadcast channel according to the size of the bandwidth value and the first bandwidth threshold and the second bandwidth threshold.

[0131] 706. The terminal device receives the first physical broadcast channel sent by the network device in multiple cell acquisition subframes according to the downlink bandwidth configuration information.

[0132] The first physical broadcast channel can be understood as any physical broadcast channel sent by a network device. The terminal device can obtain the same physical broadcast channel within a subframe from multiple cells.

[0133] When the network device sends the same physical broadcast channel within the cell acquisition subframes of multiple consecutive cells, the terminal device can receive the first physical broadcast channel within the cell acquisition subframes of multiple consecutive cells, so that the terminal can receive the first physical broadcast channel faster and improve the efficiency of the terminal device receiving the physical broadcast channel.

[0134] Specifically, when the multiple cell acquisition subframes for transmitting the physical broadcast channel are the cell acquisition subframes in the radio frames whose system frame numbers are multiples of 4, the terminal device can receive the first physical broadcast channel from the cell acquisition subframes in the radio frames with system frame numbers 0, 4, 8, and 12 respectively. When the multiple cell acquisition subframes for transmitting the physical broadcast channel can be the subframes whose subframe numbers are multiples of 14. The terminal device can receive the first physical broadcast channel from the subframes with subframe numbers 0, 14, 28, and 42 respectively. When the multiple cell acquisition subframes for transmitting the first physical broadcast channel can be the subframes whose slot numbers are multiples of 14. The terminal device can receive the first physical broadcast channel from the subframes with slot numbers 0, 14, 28, and 42 respectively.

[0135] It should be noted that the terminal device is not limited to receiving the first physical broadcast channel from the above-mentioned subframes. The above-mentioned subframes for transmitting the first physical broadcast channel are only for explanation and do not constitute a limitation to this application.

[0136] After the terminal device obtains the downlink bandwidth configuration information, it determines the receiving strategy of the first physical broadcast channel according to the magnitude relationship between the bandwidth configuration value corresponding to the downlink bandwidth configuration information and the first threshold.

[0137] The receiving strategy of the first physical broadcast channel corresponds to the above-mentioned sending strategy. When the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than the first threshold, or the bandwidth value is greater than the first bandwidth threshold, the receiving strategy of the first physical broadcast channel is that the terminal device receives the first physical broadcast channel within the multiple cell acquisition subframes and repeatedly receives the first physical broadcast channel from at least one cell acquisition subframe for transmitting the first physical broadcast channel.

[0138] The receiving strategy of the first physical broadcast channel corresponds to the above-mentioned sending strategy. When the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than the first threshold and less than the second threshold, or the bandwidth value is greater than the first bandwidth threshold and less than the second bandwidth threshold, the terminal device determines the first cell acquisition subframe according to the agreed selection method with the network device, and repeatedly receives the first physical broadcast channel on the first cell acquisition subframe, while on other subframes that are not the first cell acquisition subframe, the first physical broadcast channel is only received once. For the explanation of the agreed selection method, please refer to the above embodiments. To avoid redundancy, it will not be elaborated here.

[0139] When the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than the second threshold, or the bandwidth value is greater than the second bandwidth threshold, the receiving strategy of the first physical broadcast channel is that the terminal device repeatedly receives the first physical broadcast channel in each cell acquisition subframe used for transmitting the first physical broadcast channel.

[0140] When the bandwidth configuration value corresponding to the downlink bandwidth configuration information is equal to the second threshold, or the bandwidth value is equal to the second bandwidth threshold, the receiving strategy of the first physical broadcast channel corresponds to the sending strategy of the first physical broadcast channel. When the sending strategy of the first physical broadcast channel when the bandwidth configuration value corresponding to the downlink bandwidth configuration information is equal to the second threshold is the same as the sending strategy of the first physical broadcast channel when the bandwidth configuration value corresponding to the downlink bandwidth configuration is greater than the second threshold, the receiving strategy of the first physical broadcast channel is also the same as the receiving strategy when the bandwidth configuration value corresponding to the downlink bandwidth configuration is greater than the second threshold. When the sending strategy of the first physical broadcast channel when the bandwidth configuration value corresponding to the downlink bandwidth configuration information is equal to the second threshold is the same as the sending strategy of the first physical broadcast channel when the bandwidth configuration value corresponding to the downlink bandwidth configuration is less than the second threshold and greater than the first threshold, the receiving strategy of the first physical broadcast channel is also the same as the receiving strategy when the bandwidth configuration value corresponding to the downlink bandwidth configuration is less than the second threshold and greater than the first threshold.

[0141] When the bandwidth configuration value corresponding to the downlink bandwidth configuration information is less than the first threshold, or the bandwidth value is less than the first bandwidth threshold, all the above-mentioned multiple cell acquisition subframes used for transmitting the first physical broadcast channel are the second cell acquisition subframes, and the second cell acquisition subframe transmits at most 4 symbols of the first physical broadcast channel. When the bandwidth configuration value corresponding to the downlink bandwidth configuration information is less than the first threshold, the receiving strategy of the first physical broadcast channel is that the terminal device only receives the first cell acquisition subframe once in each cell acquisition subframe used for transmitting the first physical broadcast channel.

[0142] When the bandwidth configuration value corresponding to the downlink bandwidth configuration information is equal to the first threshold, or the bandwidth value is greater than the first bandwidth threshold, among the multiple cell acquisition subframes for transmitting the first physical broadcast channel, at least one cell acquisition subframe is not the first cell acquisition subframe, or all of the multiple cell acquisition subframes for transmitting the first physical broadcast channel are the second cell acquisition subframes.

[0143] The receiving strategy for the first physical broadcast channel when the bandwidth configuration value corresponding to the downlink bandwidth configuration information is equal to the first threshold can be the same as the receiving strategy for the first physical broadcast channel when the bandwidth configuration value corresponding to the downlink bandwidth configuration is greater than the first threshold and less than the second threshold, or can also be the same as the receiving strategy for the first physical broadcast channel when the bandwidth configuration value corresponding to the downlink bandwidth configuration is less than the first threshold. It should be noted that the sending strategy and the receiving strategy are corresponding. When the sending strategy for the first physical broadcast channel when the bandwidth configuration value corresponding to the downlink bandwidth configuration information is equal to the first threshold is the same as the sending strategy for the first physical broadcast channel when the bandwidth configuration value corresponding to the downlink bandwidth configuration is greater than the first threshold and less than the second threshold, the receiving strategy is also the same as the receiving strategy for the first physical broadcast channel when the bandwidth configuration value corresponding to the downlink bandwidth configuration is greater than the first threshold. When the sending strategy for the first physical broadcast channel when the bandwidth configuration value corresponding to the downlink bandwidth configuration information is equal to the first threshold is the same as the sending strategy for the first physical broadcast channel when the bandwidth configuration value corresponding to the downlink bandwidth configuration is less than the first threshold, the receiving strategy is also the same as the receiving strategy for the first physical broadcast channel when the bandwidth configuration value corresponding to the downlink bandwidth configuration is less than the first threshold.

[0144] It can be understood that the receiving strategy for the first physical broadcast channel obtained according to the magnitude relationship between the bandwidth configuration value and the first threshold and the second threshold can also be used to receive other physical broadcast channels.

[0145] Specifically, the terminal device can determine the receiving strategy for the physical broadcast channel according to the magnitude relationship between the bandwidth configuration value corresponding to the downlink bandwidth configuration information and the first threshold, or determine the receiving strategy for the physical broadcast channel according to the magnitude relationship between the bandwidth value and the first bandwidth threshold and the second bandwidth threshold.

[0146] In the technical solution of the embodiment of the present application, the network device sends a first physical broadcast channel to the terminal device according to the downlink bandwidth configuration information. When the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than a first threshold, the network device sends the first physical broadcast channel in multiple cell subframes, and repeats sending the first physical broadcast channel in at least one cell acquisition subframe among the multiple cell acquisition subframes used for sending the first physical broadcast channel. In this way, the network device can increase the transmission probability of the first physical broadcast channel by repeating the transmission of the first physical broadcast channel within the subframe, thereby increasing the probability that the terminal device receives the first physical broadcast channel. Moreover, the first physical broadcast channel is only repeatedly transmitted within the subframe when the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than the first threshold. This can avoid the situation where when the bandwidth is small, the number of resource particles used for transmitting the physical downlink shared channel is small due to the repeated transmission of the first physical broadcast channel within the subframe, and ensure the normal transmission of the physical downlink shared channel.

[0147] Please refer to Figure 8 , an embodiment of the present application provides a network device 800, including:

[0148] A signal sending module 801, configured to send a signal for the terminal device to access to the terminal device on a broadcast dedicated carrier;

[0149] A channel sending module 802, configured to send a first physical broadcast channel to the terminal device in multiple cell acquisition subframes, where the time interval between every two adjacent cell acquisition subframes among the multiple cell acquisition subframes is greater than or equal to 30 ms; at least one first cell acquisition subframe exists among the multiple cell acquisition subframes for sending the first physical broadcast channel, and the first cell acquisition subframe is used to transmit at least 5 symbols of the first physical broadcast channel.

[0150] In the technical solution of the embodiment of the present application, the network device sends the first physical broadcast channel in multiple cell subframes, and repeats sending the first physical broadcast channel in at least one cell acquisition subframe among the multiple cell acquisition subframes used for sending the first physical broadcast channel. In this way, the network device can increase the transmission probability of the first physical broadcast channel by repeating the transmission of the first physical broadcast channel within the subframe, thereby increasing the probability that the terminal device receives the first physical broadcast channel.

[0151] In some embodiments, the network device 800 further includes:

[0152] A bandwidth configuration determination module, configured to determine the downlink bandwidth configuration information of the carrier or the cell;

[0153] The channel sending module 802 is specifically configured to:

[0154] According to the downlink bandwidth configuration information, the first physical broadcast channel is sent to the terminal device in the cell acquisition subframes of the multiple cells. When the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than or equal to the first threshold, at least one of the first cell acquisition subframes exists in the cell acquisition subframes of the multiple cells.

[0155] In some embodiments, when the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than the first threshold and less than the second threshold, in the cell acquisition subframes of the multiple cells, at least one cell acquisition subframe is not the first cell acquisition subframe, and the second threshold is greater than the first threshold.

[0156] In some embodiments, when the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than the second threshold, all the cell acquisition subframes of the multiple cells are the first cell acquisition subframes, and the second threshold is greater than the first threshold.

[0157] In some embodiments, when the bandwidth configuration value corresponding to the downlink bandwidth configuration information is equal to the second threshold, in the cell acquisition subframes of the multiple cells, at least one cell acquisition subframe is not the first cell acquisition subframe, or all the cell acquisition subframes of the multiple cells are the first cell acquisition subframes.

[0158] In some embodiments, the network device 800 further includes:

[0159] A bandwidth configuration information sending module, configured to send a second physical broadcast channel to the terminal device, where the second physical broadcast channel carries master information block multimedia broadcast multicast service information, and the master information block multimedia broadcast multicast service information includes the downlink bandwidth configuration information.

[0160] It should be noted that the explanations and technical effects of the transmission method of the physical channel in the above embodiments also apply to the network device in this embodiment. To avoid redundancy, they are not described herein again.

[0161] Please refer to Figure 9 , in a fourth aspect, an embodiment of the present application provides a terminal device 900, including:

[0162] An access module 901, configured to access a broadcast dedicated carrier;

[0163] A channel receiving module 902, configured to receive the first physical broadcast channel sent by the network device in the cell acquisition subframes of the multiple cells. The time interval between every two adjacent cell acquisition subframes in the cell acquisition subframes of the multiple cells is greater than or equal to 30 ms; at least one first cell acquisition subframe exists in the cell acquisition subframes of the multiple cells for sending the first physical broadcast channel, and the first cell acquisition subframe is used to transmit at least 5 symbols of the first physical broadcast channel.

[0164] In the technical solution of the embodiment of the present application, a network device transmits a first physical broadcast channel within multiple cell subframes, and repeats the transmission of the first physical broadcast channel within at least one cell acquisition subframe among the multiple cell acquisition subframes used for transmitting the first physical broadcast channel. In this way, the terminal device can increase the transmission probability of the first physical broadcast channel by repeatedly receiving the first physical broadcast channel within the cell acquisition subframe, thereby increasing the probability that the terminal device receives the first physical broadcast channel.

[0165] In some embodiments, the terminal device further includes:

[0166] A configuration information determination module, configured to determine downlink bandwidth configuration information;

[0167] The channel reception module 902 is specifically configured to:

[0168] Receive the first physical broadcast channel within the multiple cell acquisition subframes according to the downlink bandwidth configuration information. When the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than or equal to a first threshold, at least one of the multiple cell acquisition subframes is the first cell acquisition subframe.

[0169] In some embodiments, when the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than the first threshold and less than a second threshold, among the multiple cell acquisition subframes, at least one cell acquisition subframe is not the first cell acquisition subframe, and the second threshold is greater than the first threshold.

[0170] In some embodiments, when the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than the second threshold, all of the multiple cell acquisition subframes are the first cell acquisition subframes.

[0171] In some embodiments, when the bandwidth configuration value corresponding to the downlink bandwidth configuration information is equal to the second threshold, among the multiple cell acquisition subframes, at least one cell acquisition subframe is not the first cell acquisition subframe, or all of the multiple cell acquisition subframes are the first cell acquisition subframes.

[0172] In some embodiments, the terminal device 900 further includes:

[0173] A bandwidth configuration information acquisition module, configured to receive a second physical broadcast channel sent by a network device, where the second physical broadcast channel carries master information block multimedia broadcast multicast service information, and the master information block multimedia broadcast multicast service information includes the downlink bandwidth configuration information.

[0174] It should be noted that the explanations and technical effects of the physical channel transmission method in the above embodiments also apply to the terminal device in this embodiment. To avoid redundancy, they will not be elaborated here.

[0175] An embodiment of the present application provides a network device, which includes a processor and a memory. The memory stores computer instructions; the processor executes the computer instructions stored in the memory, so that the network device executes the physical channel transmission method of any of the above embodiments.

[0176] Optionally, Figure 10 Schematically provide a possible basic hardware architecture of the network device 1000 described in the present application.

[0177] See Figure 10 , the network device 1000 includes a processor 1001, a memory 1002, a communication interface 1003, and a bus 1004.

[0178] In the network device 1000, the number of processors 1001 can be one or more, Figure 10 Only one processor 1001 is schematically shown. Optionally, the processor 1001 can be a central processing unit (CPU). If the network device 1000 has multiple processors 1001, the types of the multiple processors 1001 can be different or the same. Optionally, the multiple processors 1001 of the network device 1000 can also be integrated into a multi-core processor.

[0179] The memory 1002 stores computer instructions and data; the memory 1002 can store the computer instructions and data required to implement the physical broadcast channel transmission method provided in the present application. For example, the memory 1002 stores instructions for implementing the steps of the physical broadcast channel transmission method. The memory 1002 can be any one or any combination of the following storage media: non-volatile memory (such as read-only memory (ROM), solid-state drive (SSD), hard disk drive (HDD), optical disc), volatile memory.

[0180] The communication interface 1003 can be any one or any combination of the following devices: network interface (such as Ethernet interface), wireless network card and other devices with network access functions.

[0181] The communication interface 1003 is used for the network device 1000 to communicate with other computing devices or terminals.

[0182] The bus 1004 can connect the processor 1001 to the memory 1002 and the communication interface 1003. In this way, through the bus 1004, the processor 1001 can access the memory 1002 and can also use the communication interface 1003 to interact with other network devices or terminal devices for data.

[0183] In this application, the network device 1000 executes the computer instructions in the memory 1002, enabling the network device 1000 to implement the transmission method of the physical broadcast channel provided in this application.

[0184] An embodiment of this application provides a terminal device, which includes a processor and a memory. The memory stores computer instructions; the processor executes the computer instructions stored in the memory, enabling the terminal device to execute the transmission method of the physical channel in any of the above embodiments.

[0185] Optionally, Figure 11 Schematically provides a possible basic hardware architecture of the terminal device 1100 described in this application.

[0186] See Figure 11 , the terminal device 1100 includes a processor 1101, a memory 1102, a communication interface 1103, and a bus 1104.

[0187] In the terminal device 1100, the number of processors 1101 can be one or more, Figure 11 Only one processor 1101 is schematically shown. Optionally, the processor 1101 can be a central processing unit (CPU). If the terminal device 1100 has multiple processors 1101, the types of the multiple processors 1101 can be different or the same. Optionally, the multiple processors 1101 of the network device 1100 can also be integrated into a multi-core processor.

[0188] The memory 1102 stores computer instructions and data; the memory 1102 can store the computer instructions and data required to implement the transmission method of the physical broadcast channel provided in this application. For example, the memory 1102 stores instructions for implementing the steps of the transmission method of the physical broadcast channel. The memory 1102 can be any one or any combination of the following storage media: non-volatile memory (such as read-only memory (ROM), solid-state drive (SSD), hard disk drive (HDD), optical disc), volatile memory.

[0189] The communication interface 1103 can be any one or any combination of the following devices: network interface (such as Ethernet interface), wireless network card, and other devices with network access functions.

[0190] The communication interface 1103 is used for the terminal device 1100 to communicate data with other computing devices or terminals.

[0191] The bus 1104 can connect the processor 1101 to the memory 1102 and the communication interface 1103. In this way, through the bus 1104, the processor 1101 can access the memory 1102 and can also interact with other network devices or terminal devices using the communication interface 1103.

[0192] In this application, the terminal device 1100 executes the computer instructions in the memory 1102, enabling the terminal device 1100 to implement the physical broadcast channel transmission method provided in this application.

[0193] This application provides a computer-readable storage medium in which computer instructions are stored, and the computer instructions direct a network device to execute the physical broadcast channel transmission method of any of the above embodiments.

[0194] This application provides a computer-readable storage medium in which computer instructions are stored, and the computer instructions direct a terminal device to execute the physical broadcast channel transmission method of any of the above embodiments.

[0195] It should be understood that the processor mentioned in the embodiments of this application may be a central processing unit (CPU), or may also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0196] It should also be understood that the memory mentioned in the embodiments of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. By way of example but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchlink dynamic random access memory (SLDRAM), and direct rambus random access memory (DR RAM).

[0197] It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA, or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component, the memory (storage module) is integrated in the processor.

[0198] It should be noted that the memory described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0199] It should be understood that in various embodiments of the present application, the magnitudes of the sequence numbers of the above processes do not mean the order of execution. The order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

[0200] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

[0201] Those skilled in the art can clearly understand that for the convenience and conciseness of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments, and will not be elaborated herein.

[0202] In several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there can be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces, and the indirect couplings or communication connections of the devices or units can be in electrical, mechanical, or other forms.

[0203] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0204] In addition, the functional units in each embodiment of this application can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit.

[0205] When the above-mentioned functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of this application, in essence, or the part that contributes to the prior art or a part of this technical solution can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of this application. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (ROM), random access memories (RAM), magnetic disks, or optical discs.

[0206] The steps in the method of the embodiments of this application can be adjusted, combined, and deleted according to actual needs.

[0207] The modules in the device of the embodiments of this application can be combined, divided, and deleted according to actual needs.

[0208] As mentioned above, the above embodiments are only used to illustrate the technical solution of this application, rather than to limit it; although this application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of this application.

Claims

1. A transmission method for a physical broadcast channel, characterized in that, including: The network device sends a signal for the terminal device to access on a broadcast dedicated carrier; The network device determines the downlink bandwidth configuration information of the carrier or cell; The network device sends a first physical broadcast channel to the terminal device in multiple cell acquisition subframes, and the time interval between every two adjacent cell acquisition subframes in the multiple cell acquisition subframes is greater than or equal to 30 ms; at least one first cell acquisition subframe exists in the multiple cell acquisition subframes for sending the first physical broadcast channel, and the first cell acquisition subframe is used to transmit at least 5 symbols of the first physical broadcast channel, wherein the network device sending the first physical broadcast channel to the terminal device in multiple cell acquisition subframes includes: The network device sends the first physical broadcast channel to the terminal device in the multiple cell acquisition subframes according to the downlink bandwidth configuration information, and when the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than or equal to a first threshold, at least one of the first cell acquisition subframes exists in the multiple cell acquisition subframes.

2. The method according to claim 1, characterized in that When the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than the first threshold and less than a second threshold, at least one cell acquisition subframe in the multiple cell acquisition subframes is not the first cell acquisition subframe, and the second threshold is greater than the first threshold.

3. The method according to claim 2, characterized in that, When the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than the second threshold, all of the multiple cell acquisition subframes are the first cell acquisition subframes, and the second threshold is greater than the first threshold.

4. The method according to claim 2 or 3, characterized in that, When the bandwidth configuration value corresponding to the downlink bandwidth configuration information is equal to the second threshold, at least one cell acquisition subframe in the multiple cell acquisition subframes is not the first cell acquisition subframe, or all of the multiple cell acquisition subframes are the first cell acquisition subframes.

5. The method according to claim 1, characterized in that Before the network device sends the first physical broadcast channel to the terminal device in multiple cell acquisition subframes, the method further includes: The network device sends a second physical broadcast channel to the terminal device, and the second physical broadcast channel carries master information block multimedia broadcast multicast service information, and the master information block multimedia broadcast multicast service information includes the downlink bandwidth configuration information.

6. A transmission method for a physical broadcast channel, characterized in that, including: The terminal device accesses the broadcast dedicated carrier; The terminal device determines the downlink bandwidth configuration information; The terminal device receives the first physical broadcast channel sent by the network device in multiple cell acquisition subframes, and the time interval between every two adjacent cell acquisition subframes in the multiple cell acquisition subframes is greater than or equal to 30 ms; at least one first cell acquisition subframe exists in the multiple cell acquisition subframes for sending the first physical broadcast channel, and the first cell acquisition subframe is used to transmit at least 5 symbols of the first physical broadcast channel, wherein the terminal device receiving the first physical broadcast channel sent by the network device in multiple cell acquisition subframes includes: The terminal device receives the first physical broadcast channel in the subframes for cell acquisition of the multiple cells according to the downlink bandwidth configuration information. When the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than or equal to a first threshold, at least one of the subframes for cell acquisition of the multiple cells is the first cell acquisition subframe.

7. The method according to claim 6, wherein When the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than the first threshold and less than a second threshold, at least one of the subframes for cell acquisition of the multiple cells is not the first cell acquisition subframe, and the second threshold is greater than the first threshold.

8. The method according to claim 7, characterized in that, When the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than the second threshold, all of the subframes for cell acquisition of the multiple cells are the first cell acquisition subframes.

9. The method according to claim 7 or 8, characterized in that, When the bandwidth configuration value corresponding to the downlink bandwidth configuration information is equal to the second threshold, at least one of the subframes for cell acquisition of the multiple cells is not the first cell acquisition subframe, or all of the subframes for cell acquisition of the multiple cells are the first cell acquisition subframes.

10. The method according to claim 6, characterized in that, Before the network device sends the first physical broadcast channel to the terminal device in the subframes for cell acquisition of the multiple cells according to the downlink bandwidth configuration information, the method further includes: The terminal device receives a second physical broadcast channel sent by the network device, where the second physical broadcast channel carries master information block multimedia broadcast multicast service information, and the master information block multimedia broadcast multicast service information includes the downlink bandwidth configuration information.

11. A network device, characterized in that, including: a signal sending module, configured to send a signal for the terminal device to access on a broadcast dedicated carrier; a bandwidth configuration determining module, configured to determine the downlink bandwidth configuration information of the carrier or cell; a channel sending module, configured to send the first physical broadcast channel to the terminal device in the subframes for cell acquisition of the multiple cells, where the time interval between every two adjacent subframes for cell acquisition of the multiple cells is greater than or equal to 30 ms; at least one of the subframes for cell acquisition of the multiple cells for sending the first physical broadcast channel is the first cell acquisition subframe, and the first cell acquisition subframe is used to transmit at least 5 symbols of the first physical broadcast channel, where the channel sending module is specifically configured to: send the first physical broadcast channel to the terminal device in the subframes for cell acquisition of the multiple cells according to the downlink bandwidth configuration information. When the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than or equal to a first threshold, at least one of the subframes for cell acquisition of the multiple cells is the first cell acquisition subframe.

12. The network device according to claim 11, wherein, When the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than the first threshold and less than a second threshold, at least one of the subframes for cell acquisition of the multiple cells is not the first cell acquisition subframe, and the second threshold is greater than the first threshold.

13. The network device according to claim 12, wherein When the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than the second threshold, all of the subframes for cell acquisition of the multiple cells are the first cell acquisition subframes, and the second threshold is greater than the first threshold.

14. The network device according to claim 12 or 13, characterized in that, When the bandwidth configuration value corresponding to the downlink bandwidth configuration information is equal to the second threshold, among the multiple cell acquisition subframes, at least one cell acquisition subframe is not the first cell acquisition subframe, or all the multiple cell acquisition subframes are the first cell acquisition subframes.

15. The network device according to claim 11, wherein The network device further includes: A bandwidth configuration information sending module, configured to send a second physical broadcast channel to the terminal device, where the second physical broadcast channel carries master information block multimedia broadcast multicast service information, and the master information block multimedia broadcast multicast service information includes the downlink bandwidth configuration information.

16. A terminal device, characterized in that, It includes: An access module, configured to access a broadcast dedicated carrier; A configuration information determination module, configured to determine downlink bandwidth configuration information; A channel receiving module, configured to receive a first physical broadcast channel sent by a network device within multiple cell acquisition subframes, where a time interval between every two adjacent cell acquisition subframes among the multiple cell acquisition subframes is greater than or equal to 30 ms; at least one first cell acquisition subframe exists among the multiple cell acquisition subframes for transmitting the first physical broadcast channel, and the first cell acquisition subframe is used to transmit at least 5 symbols of the first physical broadcast channel, where The channel receiving module is specifically configured to: Receive the first physical broadcast channel within the multiple cell acquisition subframes according to the downlink bandwidth configuration information. When the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than or equal to a first threshold, at least one of the multiple cell acquisition subframes is the first cell acquisition subframe.

17. The terminal device according to claim 16, characterized in that, When the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than the first threshold and less than the second threshold, among the multiple cell acquisition subframes, at least one cell acquisition subframe is not the first cell acquisition subframe, and the second threshold is greater than the first threshold.

18. The terminal device according to claim 17, wherein When the bandwidth configuration value corresponding to the downlink bandwidth configuration information is greater than the second threshold, all the multiple cell acquisition subframes are the first cell acquisition subframes.

19. The terminal device according to claim 17 or 18, characterized in that When the bandwidth configuration value corresponding to the downlink bandwidth configuration information is equal to the second threshold, among the multiple cell acquisition subframes, at least one cell acquisition subframe is not the first cell acquisition subframe, or all the multiple cell acquisition subframes are the first cell acquisition subframes.

20. The terminal device according to claim 16, wherein The terminal device further includes: A bandwidth configuration information acquisition module, configured to receive a second physical broadcast channel sent by a network device, where the second physical broadcast channel carries master information block multimedia broadcast multicast service information, and the master information block multimedia broadcast multicast service information includes the downlink bandwidth configuration information.

21. A network device, characterized in that, It includes a processor and a memory, and the memory stores computer instructions; the processor executes the computer instructions stored in the memory, so that the network device executes the method according to any one of claims 1 - 5.

22. A terminal device, characterized in that, It includes a processor and a memory, and the memory stores computer instructions; the processor executes the computer instructions stored in the memory, so that the terminal device executes the method according to any one of claims 6 - 10.

23. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that direct a network device to execute the method according to any one of claims 1-5.

24. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that direct a terminal device to execute the method according to any one of claims 6-10.

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