An indication method and device of random access physical resource

Abstract

Disclosed are a method and device for indicating a random access physical resource, which can include: configuring a type of a random access time slot semi-statically through a broadcast channel; and notifying a terminal of an association relationship between a downlink synchronization block or a reference signal and a first random access time slot through a system message. The present application can solve the problem that a base station cannot acquire downlink transmission beam information selected by a terminal in the related art.

Description

[0001] This application is a divisional application of the Chinese Patent Application No. 201710189324.8, filed on March 27, 2017, entitled "Indication method and device of random access physical resource". TECHNICAL FIELD

[0002] The present application relates to the field of wireless communication, in particular to an indication method and device of random access physical resource. BACKGROUND

[0003] The new generation mobile communication system will be networked at a higher carrier frequency than the frequency used by 2G, 3G and 4G systems. The frequency bands currently widely recognized by the industry and international organizations are 3GHz-6GHz and 6GHz-100GHz. Compared with the network frequency of early communication systems, these frequency bands are relatively high and have greater propagation loss, resulting in a smaller coverage radius with the same power. This also determines that the beamforming technology needs to be used in the network of the new generation mobile communication system to improve the coverage radius. The beamforming technology is essential for initial access, which has higher coverage requirements and a coverage range greater than the service coverage requirement.

[0004] For the new generation mobile communication system widely using beamforming, each beam cannot completely cover the entire cell, and multiple beams are needed to cover the entire cell or the traditional sector. If multiple beams cannot be transmitted simultaneously, a beam scanning process in the time dimension is needed to cover the entire cell or sector. For downlink common signals or channels such as synchronization signals, broadcast channels, common control channels, and common service channels, seamless coverage of the entire cell is required, and the coverage requirement is met through beams. Therefore, in the case where multiple beams cannot be transmitted simultaneously, a complete beam scanning process is required to enable terminals at all possible positions in the cell to read the corresponding common signals or common information. After reading the random access configuration message carried by the common signals or common information, the terminal can initiate random access according to the random access resource notified in the random access configuration message. These random access resources are common resources for all beams, and there is no specific random access resource subset configuration for a specific beam. The advantage is that the random access resource is a large resource pool for all beams, which has a larger selection range of resources and can reduce the collision probability of random access when the access density is not high. However, the obvious disadvantage is that there is no resource subset for a specific beam direction, and the base station cannot determine the preferred downlink beam of the terminal through the selected resource. SUMMARY

[0005] In order to solve the technical problem that the base station cannot acquire the downlink sending beam information selected by the terminal, the embodiment of the application provides an indication method and device of a random access physical resource.

[0006] The application provides:

[0007] An indication method of a random access physical resource comprises:

[0008] A type of a random access time slot is semi-statically configured through a broadcast channel;

[0009] An association relationship between a downlink synchronization block or a reference signal and a first random access time slot is informed to a terminal through a system message.

[0010] The internal structure of the random access time slot comprises at least one of the following:

[0011] A ratio of a downlink part to an uplink part in the time slot;

[0012] A symbol quantity occupied by random access of the uplink part in the time slot;

[0013] A time length of a random access resource of the uplink part in the time slot.

[0014] The type of the random access time slot is a downlink part dominant time slot or an uplink part dominant time slot.

[0015] The type of the random access time slot is set according to a random access preamble format supported as needed.

[0016] The association relationship between the downlink synchronization block or the reference signal and the first random access time slot is that a kth random access time slot after the downlink synchronization block or the reference signal in a time domain is the first random access time slot, and k is a positive integer.

[0017] The method further comprises the following steps: determining that the synchronization block or the reference signal is associated with N random access time slots, and informing the terminal in a displayed or implicit manner, wherein N is an integer greater than or equal to 1 or a fraction greater than 0 and less than 1.

[0018] The N is determined by at least one of the following configurations or any combination thereof:

[0019] A random access channel preamble format;

[0020] A random access time slot configuration;

[0021] A length of a random access signal.

[0022] The type of the random access time slot is semi-statically configured through the broadcast channel, and the type comprises one of the following:

[0023] All the synchronization blocks or reference signals in the synchronization burst set have the same association relationship with the first random access time slot corresponding to each of them.

[0024] Each of the synchronization blocks or reference signals in the synchronization burst set has a separately set association relationship.

[0025] Each of the random access time slots provides one or more frequency domain resources as random access time-frequency resources.

[0026] The association relationship between the downlink synchronization block or reference signal and the first random access time slot is related to the index of the downlink synchronization block or reference signal in the time domain.

[0027] An indication device of a random access physical resource, comprising:

[0028] A first configuration module configured to semi-statically configure the type of random access time slot through a broadcast channel.

[0029] A first notification module configured to notify the terminal of the association relationship between the downlink synchronization block or reference signal and the first random access time slot through a system message.

[0030] The internal structure of the random access time slot includes at least one of the following:

[0031] The proportion of the downlink part and the uplink part in the time slot;

[0032] The number of symbols occupied by the random access in the uplink part of the time slot;

[0033] The time length of the random access resource in the uplink part of the time slot.

[0034] The type of the random access time slot is a downlink part dominant time slot or an uplink part dominant time slot.

[0035] The first configuration module is specifically configured to set the type of the random access time slot according to the random access preamble format to be supported.

[0036] The first configuration module is further configured to determine the association relationship between the downlink synchronization block or reference signal and the first random access time slot in the time domain as: the kth random access time slot after the downlink synchronization block or reference signal is the first random access time slot, and k is a positive integer.

[0037] The first configuration module is further configured to determine that the synchronization block or reference signal is associated with N random access time slots, and the first notification module is further configured to notify the terminal of the association between the synchronization block or reference signal and the N random access time slots in a display or implicit manner, N being an integer greater than or equal to 1 or a fraction greater than 0 and less than 1.

[0038] The N is determined by at least one of the following configurations or any combination thereof:

[0039] A random access channel preamble format;

[0040] A random access slot configuration;

[0041] A length of a random access signal.

[0042] The first configuration module is configured to semi-statically configure a type of the random access slot through a broadcast channel, and the type includes one of the following:

[0043] All synchronization blocks or reference signals in the synchronization burst set have the same association relationship with the first random access slot corresponding thereto;

[0044] Each synchronization block or reference signal in the synchronization burst set has a separately set association relationship.

[0045] The first configuration module is further configured to configure each random access slot to provide one or more frequency domain resources as random access time-frequency resources.

[0046] The first configuration module is further configured to determine, in the time domain, the association relationship between the downlink synchronization block or reference signal and the first random access slot as follows: the association relationship between the downlink synchronization block or reference signal and the first random access slot in the time domain is related to an index of the downlink synchronization block or reference signal.

[0047] An indication device of a random access physical resource, comprising a processor and a memory, the memory stores computer executable instructions, and the computer executable instructions are executed by the processor to implement the following method:

[0048] Semi-statically configure a type of the random access slot through a broadcast channel;

[0049] Inform a terminal of an association relationship between a downlink synchronization block or reference signal and a first random access slot through a system message.

[0050] An indication method of a random access physical resource, comprising:

[0051] Receive a type of a random access slot semi-statically configured by a base station or a transmission point (TRP) through a broadcast channel;

[0052] Determine a used random access slot according to an association relationship between a downlink synchronization block or reference signal and a first random access slot from the base station or the transmission point;

[0053] Send a random access signal on the determined random access slot or part of the random access slot.

[0054] The internal structure of the random access time slot includes at least one of the following:

[0055] The ratio of the downlink part and the uplink part in a time slot;

[0056] The number of symbols occupied by the random access in the uplink part of a time slot;

[0057] The time length of the random access resource in the uplink part of a time slot.

[0058] The type of the random access time slot meets one of the following conditions:

[0059] The downlink part is dominant in a time slot;

[0060] The uplink part is dominant in a time slot.

[0061] The association between the downlink synchronization block and the first random access time slot in the time domain is that the kth random access time slot after the downlink synchronization block or the reference signal is the first random access time slot, and k is a positive integer;

[0062] The sending of the random access signal in the determined random access time slot or part of the random access time slot includes sending the random access signal from the first random access time slot or any random access time slot after the first random access time slot.

[0063] The sending of the random access signal in the determined random access time slot or part of the random access time slot includes selecting N random access time slots to send the random access signal, and N is an integer greater than or equal to 1 or a fraction greater than 0 and less than 1.

[0064] The N is determined by at least one of the following configurations or any combination thereof:

[0065] The random access channel preamble format;

[0066] The random access time slot configuration;

[0067] The length of the random access signal.

[0068] The sending of the random access signal in the determined random access time slot or part of the random access time slot includes that the starting position of the random access signal in the random access time slot is determined by the index number of the downlink synchronization block or the reference signal and N.

[0069] It also includes selecting one or more frequency domain resources as random access time-frequency resources in each random access time slot, so that the random access signal is sent using the random access time-frequency resources.

[0070] The sending of the random access signal on the determined random access slot or partial random access slot comprises: determining a frequency domain resource or a frequency domain position by frequency domain randomization when the random access signal is sent.

[0071] The association relationship between the downlink synchronization block or the reference signal and the first random access slot is related to an index of the downlink synchronization block or the reference signal in the time domain; and the sending of the random access signal on the determined random access slot or partial random access slot comprises: sending the random access signal from the first random access slot or any random access slot selected after the first random access slot as a starting position.

[0072] An indication apparatus of a random access physical resource, comprising:

[0073] The second receiving module is configured to receive a type of random access slot configured by a base station or a transmission node (TRP) through a broadcast channel semi-statically.

[0074] The second determining module is configured to determine a used random access slot according to an association relationship between a downlink synchronization block or a reference signal from a base station or a transmission node and a first random access slot.

[0075] The second sending module is configured to send a random access signal on the determined random access slot or partial random access slot.

[0076] The internal structure of the random access slot comprises at least one of the following:

[0077] A proportion of a downlink part and an uplink part in a slot;

[0078] A number of symbols occupied by random access in a slot;

[0079] A time length of random access resource in a slot.

[0080] The type of the random access slot satisfies one of the following conditions:

[0081] A downlink part dominant slot;

[0082] An uplink part dominant slot.

[0083] The association relationship between the downlink synchronization block or the reference signal and the first random access slot in the time domain is that a kth random access slot after the downlink synchronization block or the reference signal is the first random access slot, and k is a positive integer; and the second sending module is specifically configured to send the random access signal from the first random access slot or any random access slot selected after the first random access slot as a starting position.

[0084] The second sending module is specifically configured to send the random access signal in N random access time slots, where N is an integer greater than or equal to 1 or a fraction greater than 0 and less than 1.

[0085] The N is determined by at least one of the following configurations or any combination thereof:

[0086] The random access channel preamble format;

[0087] The random access time slot configuration;

[0088] The length of the random access signal.

[0089] The second sending module is further configured to determine the starting position of the random access signal in the random access time slot according to the index number of the downlink synchronization block or the reference signal and N.

[0090] The second determining module is further configured to select one or more frequency domain resources as random access time-frequency resources in each random access time slot, so that the random access signal is sent by using the random access time-frequency resources.

[0091] The second sending module is further configured to determine the frequency domain resource or the frequency domain position by frequency domain randomization when sending the random access signal.

[0092] The association relationship between the downlink synchronization block or the reference signal and the first random access time slot is related to the index of the downlink synchronization block or the reference signal in the time domain; and the second sending module is specifically configured to send the random access signal starting from the first random access time slot or any random access time slot selected after the first random access time slot.

[0093] An indication device of a random access physical resource, comprising a processor and a memory, the memory stores computer executable instructions, when the computer executable instructions are executed by the processor, the following method is implemented:

[0094] Receiving the type of random access time slot configured by the base station or the transmission node TRP through the broadcast channel semi-statically;

[0095] According to the association relationship between the downlink synchronization block or the reference signal from the base station or the transmission node and the first random access time slot, determining the used random access time slot;

[0096] Sending the random access signal on the determined random access time slot or part of the random access time slot.

[0097] The indication method and device of the random access physical resource in the embodiment of the application can solve the problem that the base station cannot obtain the downlink transmission beam information selected by the terminal in the related art.

[0098] Additional features and advantages of the present application will be set forth in the description that follows, and in part will be apparent from the description, or can be learned by practice of the present application. The objectives and other advantages of the present application will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings. BRIEF DESCRIPTION OF DRAWINGS

[0099] The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate the present application and, together with the description, further serve to explain the principles of the application and to enable a person skilled in the pertinent art to make and use the application.

[0100] Figure 1 A flowchart of a random access physical resource indication method of an embodiment of the present application;

[0101] Figure 2 A structural diagram of a random access physical resource indication device of an embodiment of the present application;

[0102] Figure 3 A flowchart of a random access physical resource indication method of an embodiment of the present application;

[0103] Figure 4 A structural diagram of a random access physical resource indication device of an embodiment of the present application;

[0104] Figure 5 An example diagram of a correspondence between a synchronization block and a random access resource subset of an embodiment of the present application;

[0105] Figure 6 An example diagram of a synchronization burst set of an embodiment of the present application;

[0106] Figure 7 An example diagram of a time slot of an embodiment of the present application;

[0107] Figure 8 A diagram of a mapping relationship between a downlink synchronization block or reference signal, an occasion, and a RACH time slot of Example 1 of the present application;

[0108] Figure 9 A diagram of another mapping relationship between a downlink synchronization block or reference signal, an occasion, and a RACH time slot of Example 1 of the present application;

[0109] Figure 10 A diagram of still another mapping relationship between a downlink synchronization block or reference signal, an occasion, and a RACH time slot of Example 1 of the present application;

[0110] Figure 11A schematic diagram of mapping relationship between a downlink synchronization block or reference signal, occasion and RACH slot in Example 2 of the present application;

[0111] Figure 12 A schematic diagram of mapping relationship between a downlink synchronization block or reference signal, occasion and RACH slot in Example 2 of the present application. DETAILED DESCRIPTION

[0112] In order to make the objects, technical solutions and advantages of the present application clearer, the embodiments of the present application will be described in detail below with reference to the drawings. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other in any manner without conflict.

[0113] The steps shown in the flowchart of the drawings can be executed in a computer system such as a set of computer-executable instructions. Moreover, although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that here.

[0114] Embodiment One

[0115] As shown in Figure 1 A method of random access physical resource indication can include:

[0116] Step 101, configuring the type of random access slot semi-statically through a broadcast channel;

[0117] Step 102, informing the terminal of the association relationship between the downlink synchronization block or reference signal and the first random access slot through a system message.

[0118] In actual application, the association relationship between the downlink synchronization block or reference signal and the random access slot can involve multiple random access slots, which can be N (as described below), and the first random access slot in the embodiment represents the first slot of the multiple random access slots, and the starting point + number can completely express the random access slot. In specific operation, N can be notified separately, and the first random access slot can also be notified separately.

[0119] In an implementation manner, the internal structure of the random access slot can include at least one of the following:

[0120] The ratio of the downlink part and the uplink part in the slot;

[0121] The number of symbols occupied by the random access in the uplink part of the slot;

[0122] The time length of the random access resource in the uplink part of the slot.

[0123] In an implementation, the type of the random access slot is a downlink part dominant slot or an uplink part dominant slot.

[0124] In an implementation, the type of the random access slot is set according to a required random access preamble format.

[0125] In an implementation, the association between the downlink synchronization block or reference signal and the first random access slot can be in time domain as follows: the kth random access slot after the downlink synchronization block or reference signal is the first random access slot, and k is a positive integer.

[0126] In another implementation, the association between the downlink synchronization block or reference signal and the first random access slot can be in time domain as follows: the association between the downlink synchronization block or reference signal and the first random access slot is related to an index of the downlink synchronization block or reference signal in time domain. For example, the random access slot can select the same index of the downlink synchronization block or reference signal, or can obtain the random access slot by function calculation on the index of the downlink synchronization block or reference signal. Here, the index can be an index number.

[0127] In an implementation, it can further include determining that the synchronization block or reference signal is associated with N random access slots, and notifying the terminal in a displayed or implicit manner, where N is an integer greater than or equal to 1 or a fraction greater than 0 and less than 1. In actual application, determining that the synchronization block or reference signal is associated with N random access slots and notifying the terminal, and notifying the terminal of the association between the synchronization block or reference signal and the first access slot in the embodiment do not have an explicit order.

[0128] In an implementation, the N can be determined by at least one of the following configurations or any combination thereof:

[0129] a random access channel preamble format;

[0130] a random access slot configuration;

[0131] a length of a random access signal.

[0132] In an implementation, the type of the random access slot is semi-statically configured by a broadcast channel, including one of the following:

[0133] all the synchronization blocks or reference signals in the synchronization burst set have the same association relationship with their respective first random access slots;

[0134] each of the synchronization blocks or reference signals in the synchronization burst set has a separately set association relationship.

[0135] In an implementation, each of the random access time slots provides one or more frequency domain resources as random access time-frequency resources.

[0136] The above method of the embodiment can be implemented by a base station, a transmission node (TRP), or other similar devices. As shown in Figure 2 An indication device of random access physical resources includes:

[0137] A first configuration module 21 is configured to semi-statically configure a type of random access time slot through a broadcast channel.

[0138] A first notification module 22 is configured to notify a terminal of an association relationship between a downlink synchronization block or a reference signal and a first random access time slot through a system message.

[0139] In an implementation, the internal structure of the random access time slot includes at least one of the following:

[0140] A ratio of a downlink part to an uplink part within a time slot;

[0141] A number of symbols occupied by random access in an uplink part within a time slot;

[0142] A time length of random access resources in an uplink part within a time slot.

[0143] In an implementation, the type of the random access time slot is a downlink part dominant time slot or an uplink part dominant time slot.

[0144] In an implementation, the first configuration module 21 can be specifically configured to set the type of the random access time slot according to a random access preamble format supported as needed.

[0145] In an implementation, the first configuration module 21 can be further configured to determine the association relationship between the downlink synchronization block or the reference signal and the first random access time slot in a time domain as: a kth random access time slot after the downlink synchronization block or the reference signal is the first random access time slot, and k is a positive integer.

[0146] In an implementation, the first configuration module 21 can be further configured to determine that a synchronization block or a reference signal is associated with N random access time slots; and the first notification module 22 can be further configured to notify a terminal of the association between the synchronization block or the reference signal and the N random access time slots in an explicit or implicit manner, N is an integer greater than or equal to 1 or a fraction greater than 0 and less than 1.

[0147] In an implementation, the N is determined by at least one of the following configurations or any combination thereof:

[0148] A random access channel preamble format;

[0149] Random access time slot configuration;

[0150] Length of random access signal.

[0151] In an implementation, the first configuration module 21 is configured to semi-statically configure, through a broadcast channel, a type of random access time slot, including one of the following:

[0152] All synchronization blocks or reference signals in the synchronization burst set have the same association relationship with the first random access time slot corresponding thereto;

[0153] Each synchronization block or reference signal in the synchronization burst set has a separately set association relationship.

[0154] In an implementation, the first configuration module 21 is further configured to configure each random access time slot to provide one or more frequency domain resources as random access time-frequency resources.

[0155] In an implementation, the first configuration module 21 is further configured to determine, in the time domain, the association relationship between the downlink synchronization block or reference signal and the first random access time slot as: the association relationship between the downlink synchronization block or reference signal and the first random access time slot is related to an index of the downlink synchronization block or reference signal in the time domain.

[0156] Another indication device of random access physical resources, comprising: a processor and a memory, the memory stores computer executable instructions, and the computer executable instructions are executed by the processor to implement the following method:

[0157] Semi-statically configure, through a broadcast channel, a type of random access time slot;

[0158] Inform a terminal of an association relationship between a downlink synchronization block or reference signal and a first random access time slot through a system message.

[0159] The indication device of the random access physical resource in the embodiment can realize all details of the method of the embodiment, and the related description of the method can be referred to. In actual application, the indication device of the random access physical resource in the embodiment can be implemented on a base station, a transmission node or other similar equipment to realize the above functions and the method of the embodiment, or the indication device of the random access physical resource in the embodiment can be directly the base station, the transmission node or other similar equipment. In actual application, the first configuration module 21 and the first notification module 22 can be realized by software, hardware or a combination of both, respectively. For example, the first configuration module 21 can be realized by a processor of the base station or the transmission node or other similar equipment, and the first notification module 22 can be realized by a communication unit of the base station or the transmission node or other similar equipment. For another example, the first configuration module 21 can be realized by a processor of the base station or the transmission node or other similar equipment, and the first notification module 22 can be realized by a combination of a communication unit and a processor of the base station or the transmission node or other similar equipment. This is not limited herein. Embodiment two

[0160] As shown in FIG. 3, a method of random access physical resource indication can include the following steps. Figure 3

[0161] Step 301, receiving a type of random access slot configured by a base station or a transmission node TRP through a broadcast channel semi-statically;

[0162] Step 302, determining a used random access slot according to an association relationship between a downlink synchronization block or a reference signal from the base station or the transmission node and a first random access slot;

[0163] Step 303, sending a random access signal on the determined random access slot or part of the random access slot.

[0164] In actual application, the association relationship between the downlink synchronization block or the reference signal and the random access slot involves multiple random access slots, which can be N (as described in embodiment one), and the first random access slot in the embodiment represents the first slot of the multiple random access slots, and the starting point and the number can completely express the random access slot. In specific operation, N can be notified separately, and the first random access slot can also be notified separately.

[0165] In an implementation manner, the internal structure of the random access slot includes at least one of the following:

[0166] A ratio of a downlink part and an uplink part in a slot;

[0167] A number of symbols occupied by random access in an uplink part in a slot;

[0168] A time length of random access resource in an uplink part in a slot.​

[0169] In an implementation, the type of the random access slot satisfies one of the following conditions:

[0170] a downlink part dominant slot;

[0171] an uplink part dominant slot.

[0172] In an implementation, the association between the downlink synchronization block and the first random access slot in time domain is that the kth random access slot after the downlink synchronization block or the reference signal is the first random access slot, k is a positive integer. At this time, the sending of the random access signal in the determined random access slot or part of the random access slot can include sending the random access signal with the first random access slot or any random access slot after the first random access slot selected randomly as a starting position.

[0173] In an implementation, the sending of the random access signal in the determined random access slot or part of the random access slot can include selecting N random access slots to send the random access signal, N is an integer greater than or equal to 1 or a fraction greater than 0 and less than 1.

[0174] In an implementation, the N is determined by at least one of the following configurations or any combination thereof:

[0175] a random access channel preamble format;

[0176] a random access slot configuration;

[0177] a length of the random access signal.

[0178] In an implementation, the sending of the random access signal in the determined random access slot or part of the random access slot can include that the starting position of the random access signal in the random access slot is determined by the index number of the downlink synchronization block or the reference signal and N.

[0179] In an implementation, it can further include selecting one or more frequency domain resources as random access time-frequency resources in each of the random access slots, so that the random access signal is sent using the random access time-frequency resources.

[0180] In an implementation, the sending of the random access signal in the determined random access slot or part of the random access slot can include determining the frequency domain resources or the frequency domain positions by frequency domain randomization when sending the random access signal.

[0181] In one implementation, the association between the downlink synchronization block or reference signal and the first random access time slot is related to the index of the downlink synchronization block or reference signal in the time domain; in this case, transmitting the random access signal on the determined random access time slot or part of the random access time slot may include: transmitting the random access signal with the first random access time slot or any random access time slot after randomly selecting the first random access time slot as the starting position.

[0182] The method described in this embodiment can be implemented using a terminal or other similar devices.

[0183] like Figure 4 As shown, an indication device for random access to physical resources may include:

[0184] The second receiving module 41 is used to receive the type of random access time slots semi-statically configured by the base station or transmission node TRP through the broadcast channel.

[0185] The second determining module 42 is used to determine the random access time slot to be used based on the correlation between the downlink synchronization block or reference signal from the base station or transmission node and the first random access time slot;

[0186] The second transmitting module 43 is used to transmit random access signals on the determined random access time slot or part of the random access time slot.

[0187] In one implementation, the internal structure of the random access time slot includes at least one of the following:

[0188] The ratio of the downlink to the uplink portion within a time slot;

[0189] The number of symbols used for random access within a time slot;

[0190] The duration of random access to resources within a time slot.

[0191] In one implementation, the type of the random access slot satisfies one of the following conditions:

[0192] The time slot is primarily for the downlink portion;

[0193] The time slot is dominated by the uplink portion.

[0194] In one implementation, the association between the downlink synchronization block or reference signal and the first random access time slot is in the time domain as follows: the k-th random access time slot after the downlink synchronization block or reference signal is the first random access time slot, where k is a positive integer. In this case, the second transmitting module 43 can specifically be used to transmit a random access signal starting from the first random access time slot or any random access time slot randomly selected after the first random access time slot.

[0195] In an implementation form, the second sending module 43 is configured to send the random access signal in N random access time slots, where N is an integer greater than or equal to 1 or a fraction greater than 0 and less than 1. In an implementation form, the N is determined by one or any combination of the following configurations: a random access channel preamble format; a random access time slot configuration; a length of the random access signal.

[0196] In an implementation form, the second sending module 43 is further configured to determine a starting position of the random access signal in the random access time slot according to the index of the downlink synchronization block or reference signal and the N.

[0197] In an implementation form, the second determining module 42 is further configured to select one or more frequency domain resources as random access time-frequency resources in each of the random access time slots, so that the random access signal is sent using the random access time-frequency resources.

[0198] In an implementation form, the second sending module 43 is further configured to determine the frequency domain resources or frequency domain positions by frequency domain randomization when sending the random access signal.

[0199] In an implementation form, the association between the downlink synchronization block or reference signal and the first random access time slot is related to the index of the downlink synchronization block or reference signal in the time domain. At this time, the second sending module 43 is configured to send the random access signal starting from the first random access time slot or any random access time slot selected after the first random access time slot.

[0200] Yet another indication device of random access physical resources, comprising: a processor and a memory, the memory stores computer executable instructions, the computer executable instructions are executed by the processor to implement the following method:

[0201] Receiving a type of random access time slot configured by a base station or transmission node TRP through a broadcast channel semi-statically;

[0202] According to the association between the downlink synchronization block or reference signal from the base station or transmission node and the first random access time slot, determining a used random access time slot;

[0203] Sending a random access signal on the determined random access time slot or part of the random access time slot.

[0204] The indication device of the random access physical resource in the embodiment can realize all details of the method of the embodiment, and the related description of the method can be referred to. In actual application, the indication device of the random access physical resource in the embodiment can realize the above functions and the method of the embodiment by being arranged on a terminal or other similar device, or the indication device of the random access physical resource in the embodiment can be directly a terminal or other similar device.

[0205] In actual application, the second receiving module 41, the second determining module 42 and the second sending module 43 can be realized by software, hardware or a combination of both. For example, the second determining module 42 can be realized by a processor of a terminal or other similar device, and the second receiving module 41 and the second sending module 43 can be realized by a communication unit of the terminal or other similar device. For another example, the second determining module 42 can be realized by a processor of a terminal or other similar device, and the second receiving module 41 and the second sending module 43 can be realized by a combination of a communication unit and a processor of the terminal or other similar device. This is not limited herein.

[0206] Embodiment three

[0207] The embodiment provides a method for indicating a random access physical resource, and the process is as follows:

[0208] The base station or TRP semi-statically configures the type of random access slot through a broadcast channel;

[0209] The terminal receives the type of random access slot semi-statically configured by the base station or TRP through the broadcast channel;

[0210] The base station or TRP informs the terminal of the association relationship between the downlink synchronization block or reference signal and the first random access slot through a system message;

[0211] The terminal determines the random access slot according to the received downlink signal or channel quality and the association relationship between the downlink synchronization block or reference signal and the first random access slot;

[0212] The terminal sends a random access signal on the determined random access slot or part of the random access slot.

[0213] The specific implementation process of the embodiment can refer to Embodiments One and Two, and the above Embodiments One and Two can be referred to.

[0214] To solve the problem of how the base station obtains the downlink transmission beam information selected by the terminal, it is necessary to consider establishing a corresponding relationship that can be associated between the initial downlink signal or channel received by the terminal and the random access resource. These common signals can be various types of synchronization signals, and the common channels can be broadcast channels, channels carrying public control information, or channels carrying public services, etc.

[0215] The simplest uniform correspondence is a one-to-one mapping between the downlink signal or channel and a subset of the random access resource pool. As shown in FIG. 1, for example, a certain block of resources carrying the above-mentioned common signal or channel is referred to as a synchronization block (SS block), which is merely a possible name and does not limit the functional features of the corresponding downlink signal or channel. Each synchronization block corresponds to at least a downlink signal or channel of a specific beam direction or antenna port. The synchronization block and a subset of random access resources are in one-to-one correspondence, such as shown in FIG. 2, where downlink synchronization block 1 or reference signal 1 corresponds to RACH resource 1, downlink synchronization block 2 or reference signal 2 corresponds to RACH resource 2, downlink synchronization block 3 or reference signal 3 corresponds to RACH resource 3, and downlink synchronization block 4 or reference signal 4 corresponds to RACH resource 4. Figure 5 Figure 5 Here, the one-to-one correspondence is a relatively simple correspondence. The terminal needs to obtain this correspondence to obtain the corresponding random access resource and then determine the corresponding random access resource according to the selected downlink signal or channel.

[0216] Specifically, the synchronization block of the base station is the smallest unit carrying the synchronization signal, carrying the synchronization signal on a beam direction or antenna port. Multiple synchronization blocks are combined in the time domain to form a synchronization burst (SS burst), and multiple synchronization bursts are combined in the time domain to form a synchronization burst set (SS burst set). A synchronization burst set contains synchronization signals on all beam directions or antenna ports, and the synchronization signals are repeatedly transmitted in a synchronization burst set period. As shown in FIG. 3, which is an example of a synchronization burst set.

[0217] A random access opportunity (RACH occasion) is defined as the time-frequency resource used by the random access signal transmitted in the configured random access preamble format. The terminal receives the downlink signal or channel and detects the quality of the downlink signal or channel to obtain quality information, such as the received signal strength of the synchronization block. The appropriate synchronization block is selected according to the received signal strength, and the time-frequency resource used by the random access opportunity (RACH occasion) is determined in combination with the correspondence between the downlink signal or channel and the subset of the random access resource pool. The base station can indirectly understand the preferred synchronization block of the terminal by receiving the random access signal. Figure 6

[0218] A random access opportunity (RACH occasion) is defined as the time-frequency resource used by the random access signal transmitted in the configured random access preamble format. The terminal receives the downlink signal or channel and detects the quality of the downlink signal or channel to obtain quality information, such as the received signal strength of the synchronization block. The appropriate synchronization block is selected according to the received signal strength, and the time-frequency resource used by the random access opportunity (RACH occasion) is determined in combination with the correspondence between the downlink signal or channel and the subset of the random access resource pool. The base station can indirectly understand the preferred synchronization block of the terminal by receiving the random access signal.

[0219] ​​The random access signal transmitted in the random access opportunity corresponds to all possible beam directions or receive antenna ports of uplink reception. The base station needs to use all the receive beam directions or receive antenna ports to detect the random access signal. For the scenario where the base station does not have beam reciprocity, the terminal needs to repeatedly transmit the random access signal to ensure that the base station can obtain the preferred downlink transmission beam and the preferred uplink reception beam by detecting the random access signal, respectively. For the scenario where the base station has beam reciprocity, the terminal can not need to repeatedly transmit the random access signal.

[0220] When describing the correspondence between the downlink signal or channel and the subset of the random access resource pool, the resource occupied by the random access opportunity representing the random access resource pool is a logical resource, which ultimately needs to be embodied on a physical resource. Here, the physical resource for transmitting the random access signal is defined as a random access slot. In the new generation of mobile communication systems, a time slot can be divided into a downlink time slot and an uplink time slot. Here, the downlink time slot or the uplink time slot is not simply a downlink signal, a downlink channel, or an uplink signal, an uplink channel, but refers to a downlink time slot with a higher proportion of downlink signals and downlink channels or an uplink time slot with a higher proportion of uplink signals and uplink channels.

[0221] As shown in FIG. 1, an example of a time slot containing an uplink time slot and a downlink time slot is shown. As shown in the example of FIG. 2, the downlink time slot is a downlink time slot of a TDD mode, with 14 symbols, of which 10 symbols are occupied by a downlink control channel (DLC) and a synchronization block (SSB), with a proportion of more than 50%, and two symbols are occupied by an uplink signal RACH and a PUCCH. As shown in the example of FIG. 3, the uplink time slot is an uplink time slot of a TDD mode, with 14 symbols, of which 2 symbols are occupied by a downlink control channel (DLC), and 10 symbols are occupied by an uplink signal RACH and a PUCCH, with a proportion of more than 50%. Figure 7 Figure 7 Figure 7

[0222] Both the downlink time slot and the uplink time slot can be used to carry the uplink RACH signal. The time slot used to carry the random access signal is referred to as a random access slot. The internal structure of the downlink time slot and the uplink time slot is not limited to Figure 7 ​​​In the example, there are multiple configuration possibilities, that is, in the case of dynamic adjustment of the internal structure of the time slot, the size of the interval for transmitting the random access signal in different time slots dynamically changes, and the minimum time granularity of the change is one time slot. In the fastest case, the number of resources provided by each different random access time slot can be different. When the terminal finds the physical resource for transmitting the RACH according to the association between the downlink signal or the downlink channel (typically, a synchronization block) and a subset of the random access resource pool (typically, a RACH occasion), the acquisition of the RACH physical resource needs to read the downlink control information (DCI) in the downlink control channel in the time slot to obtain the allocation of the RACH resource in the internal structure of the time slot, and then indirectly calculate the specific physical resource location. Reading the DCI information all the time is very unfavorable for the power consumption of the terminal. Moreover, due to the dynamic change of the RACH resource in the random access time slot, it is difficult to confirm whether the random access resource is sufficient in a synchronization burst set period as a whole.

[0223] Before the random access time slot type is reconfigured, the internal structure of the random access time slot should remain unchanged, that is, the proportion of the internal downlink and uplink, the number of symbols occupied by the random access, and the length of the random access resource should remain unchanged. In the long-term parameter unit of days and months, the internal structure of the random access time slot is preferably semi-static, which can be semi-statically configured through a broadcast message. The configuration set can have multiple choices, which can be a downlink time slot, an uplink time slot, etc. The configuration of the random access time slot notified in the broadcast message can be marked by the type index of the random access time slot. The specific selection is determined by the base station according to the random access preamble format that needs to be supported by the time slot. In a special case, the semi-static configuration can also be a completely static fixed configuration.

[0224] The base station also needs to determine all the random access time slots available in the system. The density and resource distribution position of the random access time slot depend on many factors, such as the random access preamble format to be adopted by the base station, the size of the random access region provided for uplink transmission in the internal structure of the random access time slot, whether the base station can simultaneously receive multiple different beams in the frequency domain, whether the reciprocity of the transmit-receive beam of the base station exists, etc. The resource (total of time, frequency, and code resources) provided by the random access opportunity in the random access time slot in a SS burst set period needs to at least meet the correspondence with the downlink synchronization block or the reference signal.

[0225] The following two examples are used to illustrate how to determine the physical resource for transmitting the RACH, that is, the random access time slot, from the perspective of the beam reciprocity of the base station when the downlink signal or the downlink channel (typically, a downlink synchronization block or a reference signal) is associated with a subset of the random access resource pool (typically, a RACH occasion).

[0226] Example 1

[0227] This embodiment details the process of determining the physical resource of the transmission RACH, i.e. the random access slot, in the scenario where the base station does not have beam reciprocity.

[0228] Figure 8 The mapping relationship between the downlink synchronization block or reference signal, occasion and RACH slot is described in the specification. Different synchronization blocks (SS blocks) or reference signals correspond to different random access occasions (occasions). Occasion is a logical resource number that needs to be mapped to a specific physical RACH slot. Figure 8 is a typical configuration, i.e. one synchronization block corresponds to one random access occasion, and the logical resource of one random access occasion can be carried by one random access physical slot. Taking 8 RACH symbols in the physical slot as an example, it is illustrated that the same random access symbol and sequence need to be repeated 8 times in order to facilitate the training and detection of the base station on 8 different receiving beams. Here, the cyclic prefix (CP) of the random access signal and the guard period (GP) that distinguishes the downlink and uplink slots can share resources, and the suffix (GT) of the random access signal can also share resources with PUCCH.

[0229] Figure 9 is a second typical configuration, i.e. one downlink synchronization block or reference signal corresponds to one random access occasion, and the logical resource of one random access occasion can be carried by multiple random access physical slots, which is 2 in this example. The 2 physical slots have a total of 16 RACH symbols, and the same random access symbol and sequence need to be repeated 16 times in order to facilitate the training and detection of the base station on 16 different receiving beams. Uplink slot 1 and uplink slot 2 can be continuous transmission or non-continuous transmission. If a SS burst set period is long and contains more SS blocks, the corresponding RACH occasion is also longer, and the mapped RACH physical slot is also more.

[0230] Figure 10 is a third typical configuration, i.e. one downlink synchronization block or reference signal corresponds to one random access occasion, and the logical resource of multiple occasions can be carried by the same random access physical slot. One physical slot has 8 RACH symbols, and the random access symbol and sequence of the same random access occasion need to be repeated 4 times in order to facilitate the training and detection of the base station on 4 different receiving beams.

[0231] Obviously, the above three typical mapping relationships can cover one-to-one, one-to-many and many-to-one mapping relationships between the RACH occasion and the random access physical resource under the condition that the base station does not have beam reciprocity. The base station needs to at least notify the terminal of the mapping relationship between the synchronization block downlink synchronization block or reference signal and the initial RACH slot, such as notifying the terminal that the initial access can be performed in the RACH slot after the downlink synchronization block or reference signal. In particular, in the case of many-to-one between the RACH occasion and the random access physical resource, not only the initial access can be performed in the slot, but also the specific starting position in the slot needs to be determined. In addition to direct notification, the specific starting position in the slot can also be indirectly confirmed by the index number of the downlink synchronization block or reference signal and the number of random access signals that can be carried in a physical slot.

[0232] The base station can also notify how many RACH slots can be mapped to one downlink synchronization block or reference signal, that is, how many RACH slots can be used to transmit random access signals by the random access signals corresponding to the downlink synchronization block or reference signal. This number relationship is equivalent to the number of random access signals that can be carried in one RACH slot, and the two are inversely related. The number of RACH slots here can not only be an integer greater than or equal to 1, but also be a decimal number greater than 0 and less than 1, such as 0.5, which means that the random access signal can only use half of the RACH slot. If it is 0.25, it means that the random access signal can only occupy 1 / 4 of the RACH slot. The number of RACH slots that can be used by the random access signals corresponding to the downlink synchronization block or reference signal can also be indirectly calculated by the configured physical random access channel format and the length of the random access signal.

[0233] For all downlink synchronization blocks or reference signals in an SS burst set, the above single mapping relationship can be applied to all downlink synchronization blocks or reference signals, or each downlink synchronization block or reference signal can have an independent mapping relationship. The configuration of the independent mapping relationship requires more signaling overhead. From the perspective of saving signaling overhead, a single mapping relationship is uniformly configured to all downlink synchronization blocks or reference signals, and if the RACH resources required by each downlink synchronization block or reference signal are not uniform, the RACH resources required by each downlink synchronization block or reference signal can be increased in the frequency domain or the code domain.

[0234] Example 2

[0235] This example describes the process of determining the physical resource of the transmitted RACH, i.e., the random access slot, under the scenario that the base station has beam reciprocity.

[0236] Unlike the case of no beam reciprocity at the base station, in the case of beam reciprocity at the base station, the random access symbol, sequence does not need to be repeated multiple times to meet the need of base station receiving beam scanning, but does not rule out the sequence or symbol repetition for the purpose of enhancing coverage. As mentioned earlier, the random access signal sent within the RACH occasion corresponds to all possible beam directions or receiving antenna ports of the uplink reception. Under the condition of beam reciprocity, the form of RACH occasion is different from that under the condition of no reciprocity. Figure 11 The mapping relationship between downlink synchronization block or reference signal, occasion and RACH slot is described in the Figure 11 A typical configuration is that one synchronization block downlink synchronization block or reference signal corresponds to part of the resources in one random access opportunity occasion (corresponding to the base station receiving beam), and the logical resources of one random access opportunity occasion are carried by multiple random access physical slots, and a certain synchronization block downlink synchronization block or reference signal corresponds to one of the random access physical slots.

[0237] Figure 12 Another possible typical configuration is described in the

[0238] It is also a possibility that one downlink synchronization block or reference signal corresponds to multiple random access physical slots, similar to the configuration shown in Figure 9 The configuration is not repeated.

[0239] Whether the base station has no beam reciprocity or has beam reciprocity, there are certain commonalities in the mapping relationship between downlink synchronization block or reference signal and random access slot.

[0240] Similarly, the base station needs to inform the terminal at least the mapping relationship between the downlink synchronization block or reference signal and the initial RACH slot, such as informing the terminal that the initial access can be performed in the RACH slot after the downlink synchronization block or reference signal. Especially in the case of one-to-many mapping between the downlink synchronization block or reference signal and the random access physical resource, not only the initial access can be performed in the RACH slot, but also the specific starting position in the RACH slot needs to be determined. In addition to direct notification, the specific starting position in the RACH slot can also be indirectly confirmed by the index number of the downlink synchronization block or reference signal and the number of random access signals that can be carried in a physical slot.

[0241] The base station informs the terminal of the mapping relationship between the downlink synchronization block SS block or reference signal and the initial RACH slot, which can also be implemented in other specific manners, such as the association relationship between the downlink synchronization block or reference signal and the initial RACH slot is related to the index of the downlink synchronization block or reference signal in the time domain. In simple terms, if the index of the downlink synchronization block or reference signal is i, then the RACH slot with index i or the function relationship of i is the associated initial RACH slot.

[0242] The base station can also inform the terminal of the number of RACH slots that can be mapped to one downlink synchronization block or reference signal, that is, the random access signal corresponding to the downlink synchronization block or reference signal can use how many RACH slots to send the random access signal. This number relationship is equivalent to the number of random access signals that can be carried in a RACH slot, and the two are inversely related. The number of RACH slots here can not only be an integer greater than or equal to 1, but also a decimal greater than 0 and less than 1, such as 0.5, which means that the random access signal can only use half of the RACH slot. If it is 0.25, it means that the random access signal can only occupy 1 / 4 of the RACH slot. The number of RACH slots that can be used by the random access signal corresponding to the downlink synchronization block or reference signal can also be indirectly calculated by the configured physical random access channel format and the length of the random access signal.

[0243] The single mapping relationship above can be applied to all downlink synchronization blocks or reference signals, or each downlink synchronization block or reference signal can have an independent mapping relationship. The configuration of the independent mapping relationship (for example, the mapping relationship of synchronization block 0 is k=4, the mapping relationship of synchronization block 1 is k=3, and the mapping relationship of synchronization block 2 is k=6, and k is not a unified value) needs more signaling overhead. From the perspective of saving signaling overhead, the single mapping relationship is uniformly configured to all downlink synchronization blocks or reference signals, and if the RACH resources required by each downlink synchronization block or reference signal are not uniform, the RACH resources required by each downlink synchronization block or reference signal can be increased in the frequency domain or the code domain.

[0244] The notification and indication methods above are not only applicable to a single terminal user, but also applicable to a multi-user scenario. If multiple users all prefer the same downlink synchronization block or reference signal and initiate random access, the multiple users can avoid mutual interference through frequency domain or code domain randomization, and the frequency domain randomization is preferred, and the frequency domain position is selected by the terminal itself.

[0245] In addition, the embodiment of the present application further provides a computer readable storage medium, which stores computer executable instructions, and the computer executable instructions are executed to implement the random access physical resource indication method.

[0246] In addition, the embodiment of the present application further provides a computer readable storage medium, which stores computer executable instructions, and the computer executable instructions are executed to implement the random access physical resource indication method.

[0247] Optionally, in the embodiment, the storage medium can include but is not limited to a U disk, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk, and various media that can store program codes.

[0248] Optionally, in the embodiment, the processor executes the method steps of the above embodiment according to the program code stored in the storage medium.

[0249] Optionally, the specific examples in the embodiment can refer to the examples described in the above embodiment and optional implementation manner, and the embodiment will not be described here.

[0250] Those skilled in the art can understand that all or part of the steps in the foregoing method can be instructed by programs to related hardware (for example, a processor), and the programs can be stored in a computer readable storage medium, such as a read-only memory, a magnetic disk or an optical disk. Alternatively, all or part of the steps of the foregoing embodiments can also be implemented using one or more integrated circuits. Accordingly, each module / unit in the foregoing embodiments can be implemented in the form of hardware, for example, by an integrated circuit to implement its corresponding function, or in the form of a software function module, for example, by a processor executing programs / instructions stored in a memory to implement its corresponding function. The present application is not limited to any particular form of combination of hardware and software.

[0251] The basic principles and main features of the present application and the advantages of the present application are shown and described above. The present application is not limited to the above-described embodiments, and the above-described embodiments and descriptions in the specification are only illustrative of the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A wireless communication method, comprising: The terminal receives multiple synchronous burst sets. Each of the multiple synchronization burst sets includes multiple synchronization blocks (SSBs). Wherein, at least one downlink time slot includes at least one SSB from the synchronization burst set; The base station receives a notification indicating the number of random access RACH slots mapped to an SSB, wherein the number of RACH slots includes a fraction between 0 and 1, and the number of RACH slots is the reciprocal of the number of random access signals allowed to be included in a RACH slot; The terminal determines the RACH time slot based on the relationship between the at least one SSB and the RACH time slot; and The terminal sends a random access signal on the RACH time slot.

2. The method according to claim 1, wherein, A synchronization burst set includes synchronization signals in all beam directions.

3. The method according to claim 1, wherein, The plurality of SSBs in each synchronization burst set are associated with a plurality of random access RACH opportunities, and each of the plurality of SSBs corresponds to a different RACH opportunity. Each RACH opportunity is associated with a RACH slot, and the plurality of RACH opportunities include the RACH opportunities associated with the RACH slot.

4. The method according to claim 1, wherein, The at least one SSB is associated with a random access RACH opportunity. The RACH opportunity is associated with multiple RACH time slots, which include the RACH time slot, and the RACH time slot is transmitted continuously with another RACH time slot among the multiple RACH time slots.

5. The method according to claim 1, further comprising: The starting position of the random access signal in the RACH time slot is determined based on the index number of the at least one SSB and any one or more of the following: Random access channel preamble format; RACH slot configuration; The length of the random access signal.

6. The method according to claim 1, wherein, The at least one SSB includes a first SSB, and the plurality of SSBs includes at least the first SSB and a second SSB. The first SSB and the second SSB are associated with the first RACH opportunity and the second RACH opportunity, respectively, and the first RACH opportunity and the second RACH opportunity are associated with the RACH time slot.

7. A wireless communication method, comprising: The base station sends multiple synchronization burst sets. Each of the multiple synchronization burst sets includes multiple synchronization blocks (SSBs). Wherein, at least one downlink time slot includes at least one SSB from the synchronization burst set; The base station sends a notification indicating the number of random access RACH slots mapped to an SSB, wherein the number of RACH slots includes a fraction between 0 and 1, and the number of RACH slots is the reciprocal of the number of random access signals allowed to be included in a RACH slot; The base station receives random access signals on a RACH time slot, which is associated with the at least one SSB.

8. The method according to claim 7, wherein, A synchronization burst set includes synchronization signals in all beam directions.

9. The method according to claim 7, wherein, The plurality of SSBs in each synchronization burst set are associated with a plurality of random access RACH opportunities, and each of the plurality of SSBs corresponds to a different RACH opportunity. Each RACH opportunity is associated with a RACH slot, and the plurality of RACH opportunities include the RACH opportunities associated with the RACH slot.

10. The method according to claim 7, wherein, The at least one SSB is associated with a random access RACH opportunity, which is associated with multiple RACH slots.

11. The method according to claim 7, wherein, The at least one SSB includes a first SSB, and the plurality of SSBs includes at least the first SSB and a second SSB. The first SSB and the second SSB are associated with the first RACH opportunity and the second RACH opportunity, respectively, and the first RACH opportunity and the second RACH opportunity are associated with the RACH time slot.

12. A wireless communication device, comprising a processor and a memory, the memory storing computer-executable instructions, which, when executed by the processor, configure the device to: Receive multiple synchronous burst sets, in, Each of the multiple synchronization burst sets includes multiple synchronization blocks (SSBs). Wherein, at least one downlink time slot includes at least one SSB from the synchronization burst set; The base station receives a notification indicating the number of random access RACH slots mapped to an SSB, wherein the number of RACH slots includes a fraction between 0 and 1, and the number of RACH slots is the reciprocal of the number of random access signals allowed to be included in a RACH slot; The RACH time slot is determined based on the relationship between the at least one SSB and the RACH time slot; and A random access signal is transmitted on the RACH time slot.

13. The apparatus according to claim 12, wherein, A synchronization burst set includes synchronization signals in all beam directions.

14. The apparatus according to claim 12, wherein, The plurality of SSBs in each synchronization burst set are associated with a plurality of random access RACH opportunities, and each of the plurality of SSBs corresponds to a different RACH opportunity. Each RACH opportunity is associated with a RACH slot, and the plurality of RACH opportunities include the RACH opportunities associated with the RACH slot.

15. The apparatus according to claim 12, wherein, The at least one SSB is associated with a random access RACH opportunity. The RACH opportunity is associated with multiple RACH time slots, which include the RACH time slot, and the RACH time slot is transmitted continuously with another RACH time slot among the multiple RACH time slots.

16. The apparatus of claim 12, wherein when the computer-executable instructions are executed by the processor, the apparatus is further configured to: The starting position of the random access signal in the RACH time slot is determined based on the index number of the at least one SSB and any one or more of the following: Random access channel preamble format; RACH slot configuration; The length of the random access signal.

17. The apparatus according to claim 12, wherein, The at least one SSB includes a first SSB, and the plurality of SSBs includes at least the first SSB and a second SSB. The first SSB and the second SSB are associated with the first RACH opportunity and the second RACH opportunity, respectively, and the first RACH opportunity and the second RACH opportunity are associated with the RACH time slot.

18. A wireless communication device, comprising a processor and a memory, the memory storing computer-executable instructions, which, when executed by the processor, configure the device to: Send multiple synchronous burst sets, in, Each of the multiple synchronization burst sets includes multiple synchronization blocks (SSBs). Wherein, at least one downlink time slot includes at least one SSB from the synchronization burst set; Send a notification indicating the number of random access RACH slots mapped to an SSB, wherein the number of RACH slots includes a fraction between 0 and 1, and the number of RACH slots is the reciprocal of the number of random access signals allowed to be included in a RACH slot; A random access signal is received on the RACH time slot, wherein the at least one SSB is associated with the RACH time slot.

19. The apparatus according to claim 18, wherein, A synchronization burst set includes synchronization signals in all beam directions.

20. The apparatus according to claim 18, wherein, The plurality of SSBs in each synchronization burst set are associated with a plurality of random access RACH opportunities, and each of the plurality of SSBs corresponds to a different RACH opportunity. Each RACH opportunity is associated with a RACH slot, and the plurality of RACH opportunities include the RACH opportunities associated with the RACH slot.

21. The apparatus according to claim 18, wherein, The at least one SSB is associated with a random access RACH opportunity, which is associated with multiple RACH slots.

22. The apparatus according to claim 18, wherein, The at least one SSB includes a first SSB, and the plurality of SSBs includes at least the first SSB and a second SSB. The first SSB and the second SSB are associated with the first RACH opportunity and the second RACH opportunity, respectively, and the first RACH opportunity and the second RACH opportunity are associated with the RACH time slot.

23. A computer-readable storage medium storing computer-executable instructions that, when executed, implement the method as described in any one of claims 1 to 11.

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