Title: Uplink transmission control method and device thereof, communication system Technical field [0001] The present invention relates to the field of communications, and in particular, to an uplink transmission control method, an apparatus thereof, and a communication system. Background technique [0002] Long Term Evolution (LTE) supports two duplex modes: Frequency Division Dual (FDD) and Time Division Duplex (TDD). These two duplex modes support paired and non-symmetrical modes respectively. Paired spectrum. Under TDD operation, the cell implements uplink and downlink transmission in a time division manner on a single carrier frequency. In order to adapt to different uplink and downlink traffic ratios, LTE supports seven uplink and/or downlink (UL/DL, Uplink/Downlink) configurations, and the cell passes the first system information block (SIB1, System Information Block 1). The broadcast informs the user equipment (UE, User Equipment) of a certain UL/DL configuration. In general, this UL/DL configuration is relatively static, allowing only the UL/DL configuration to be changed over a longer time interval to accommodate changing traffic models. [0003] As shown in Figure 1, LTE introduces Enhanced Interference Management and Traffic Adaptation (eIMTA) in Release 12 (Release-12, Rel-12) to support dynamic changes in the service model. Frame-based UL/DL dynamic configuration. The base station configures the eIMTA-Radio Network Temporary Identifier (eIMTA-Radio Network Temporary Identifier) ​​and the Physical Downlink Control Channel (PDCCH) monitoring time for the eIMTA-enabled UE (referred to as the eIMTA UE) by using the UE-specific signaling. Refer to the UL/DL configuration. The eIMTA UE learns the actual UL/DL configuration of the current period by listening to the PDCCH scrambled by eIMTA-RNTI, and the UE that does not support eIMTA (referred to as non-eIMTA UE for short) is based on the UL/DL configuration configured in SIB1. [0004] It should be noted that the above description of the technical background is only for the purpose of facilitating a clear and complete description of the technical solutions of the present invention, and is convenient for understanding by those skilled in the art. The above technical solutions are not considered to be well known to those skilled in the art simply because these aspects are set forth in the background section of the present invention. [0005] Summary of the invention [0006] The 3rd Generation Partnership Project (3GPP) defines ultra-reliable low Latency Communication (URLLC) in the future research of wireless communication (NR, New Radio). A variety of business types and application scenarios, and proposed dynamic TDD (Dynamic TDD) to further adapt to the dynamic changes of the business model to meet the communication needs of different business types. Dynamic TDD can dynamically configure uplink and downlink transmission directions based on time slots (slots or mini-slots or sub-slots). The manner in which the uplink and downlink transmission directions are flexibly configured may affect the availability of uplink resources in a static or semi-static configuration in a cell. For example, as shown in FIG. 2, the time domain location of a static or semi-static Random Access Channel (RACH) resource pre-configured through a broadcast signal and/or a broadcast channel and/or other channels may be dynamically adjusted to downlink. During transmission, the base station cannot receive the random access request sent by the UE on the corresponding RACH resource. If the UE still sends a random access request at the location, the random access request necessarily fails, and an additional access delay may be introduced. On the other hand, the uplink transmission of the UE may cause interference to other UEs that receive downlink data. [0007] In the above scenario, in order to ensure normal random access of the UE and reduce interference to other UEs, the embodiment of the present invention provides an uplink transmission control method, a device thereof, and a communication system. [0008] According to the first aspect of the embodiment, an uplink transmission control method is provided, where the method includes: [0009] The network device explicitly or implicitly indicates dynamic scheduling information of a random access channel (RACH) resource through control signaling. [0010] According to a second aspect of the present invention, an uplink transmission control method is provided, wherein the method includes: [0011] The user equipment listens to control signaling corresponding to the selected RACH resource before using the selected RACH resource; [0012] Determining, by the user equipment, the available RACH resources according to the monitoring result of the control signaling; [0013] The network device explicitly or implicitly indicates dynamic scheduling information of the RACH resource by using the control signaling. [0014] According to a third aspect of the present invention, there is provided an uplink transmission control apparatus, wherein the apparatus comprises: [0015] And a first indication unit that explicitly or implicitly indicates dynamic scheduling information of a random access channel (RACH) resource by using control signaling. [0016] According to a fourth aspect of the present invention, there is provided an uplink transmission control apparatus, wherein the apparatus comprises: [0017] a monitoring unit, which monitors control signaling corresponding to the selected RACH resource before using the selected RACH resource; [0018] a first determining unit, which determines an available RACH resource according to a monitoring result of the control signaling; [0019] The network device explicitly or implicitly indicates dynamic scheduling information of the RACH resource by using the control signaling. [0020] According to a fifth aspect of the present invention, there is provided a network device, wherein the network device comprises the apparatus of the aforementioned third aspect. [0021] According to a sixth aspect of the present invention, there is provided a user equipment, wherein the user equipment comprises the apparatus of the aforementioned fourth aspect. [0022] According to a seventh aspect of the present invention, there is provided a communication system comprising the network device of the aforementioned fifth aspect and the user equipment of the aforementioned sixth aspect. [0023] According to an eighth aspect of the embodiments of the present invention, there is provided a computer readable program, wherein when the program is executed in an uplink transmission control device or a network device, the program causes the uplink transmission control device or user equipment to execute The uplink transmission control method according to the first aspect of the embodiments of the present invention. [0024] According to a ninth aspect of the embodiments of the present invention, there is provided a storage medium storing a computer readable program, wherein the computer readable program causes an uplink transmission control device or a network device to perform the first aspect of the embodiment of the present invention Uplink transmission control method. [0025] According to a tenth aspect of the embodiments of the present invention, a computer readable program is provided, wherein when the program is executed in an uplink transmission control device or a user equipment, the program causes the uplink transmission control device or user equipment to execute The uplink transmission control method according to the second aspect of the embodiments of the present invention. [0026] According to an eleventh aspect of the embodiments of the present invention, there is provided a storage medium storing a computer readable program, wherein the computer readable program causes an uplink transmission control device or user equipment to perform the second aspect of the embodiments of the present invention The uplink transmission control method described. [0027] The beneficial effects of the embodiments of the present invention are that the method, the device and the system of the embodiments of the present invention can ensure normal random access of the UE and reduce interference to other UEs. [0028] Specific embodiments of the present invention are disclosed in detail with reference to the following description and the drawings, in which