Uplink transmission method, terminal, and network side device
地域：
Guangdong
摘要
This application provides an uplink transmission method, a terminal, and a network side device. The method includes: storing, by a terminal, an uplink transmission time-frequency resource allocated by a network side device; when the terminal needs to send an uplink signal, determining the to-be-transmitted uplink signal based on a quantity of orthogonal frequency division multiplexing (OFDM) symbols in the uplink transmission time-frequency resource; and sending, by the terminal, the uplink signal to the network side device. During implementation of the uplink transmission method provided in this application, grant free transmission solutions are provided for different uplink transmission time-frequency resources, to effectively improve communication performance.
說明書
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This application is a continuation of International Application No. PCT/CN2017/115662, filed on Dec. 12, 2017, which claims priority to Chinese Patent Application No. 201710011353.5 filed on Jan. 6, 2017. The disclosures of which are hereby incorporated by reference in their entireties.
This application relates to the field of wireless communications technologies, and in particular, to an uplink transmission method, a terminal, and a network side device.
In a wireless cellular network such as a Long Term Evolution (LTE) system, before sending an uplink signal, a terminal first needs to establish a radio resource control (RRC) connection to a base station to enter a radio resource control connected mode, and then sends a scheduling request (SR) to the base station. If the base station allows the terminal to send the uplink signal, the base station sends a grant instruction to the terminal. After receiving the grant instruction, the terminal can send the uplink signal to the base station based on an instruction requirement. Such uplink signal sending method is referred to as granted transmission.
權(quán)利要求
What is claimed is:1. An uplink transmission method comprising:storing, by a terminal, an uplink transmission time-frequency resource allocated by a network side device, wherein the uplink transmission time-frequency resource is preconfigured for the terminal and the uplink transmission time-frequency resource includes a quantity of orthogonal frequency division multiplexing (OFDM) symbols and an uplink transmission indication that is preconfigured and includes a preconfigured correspondence between at least one quantity of OFDM symbols and to-be-transmitted uplink signals and a quantity of sub-band intervals and a quantity of sub-bands that are in the uplink transmission time-frequency resource; determining a to-be-transmitted uplink signal based on the quantity of orthogonal frequency division multiplexing (OFDM) symbols in the uplink transmission time-frequency resource when the terminal needs to send an uplink signal, wherein the terminal stores the correspondence between at least one quantity of OFDM symbols and the to-be-transmitted uplink signal and the correspondence further includes a correspondence between the to-be-transmitted uplink signal and bandwidth that is included the uplink transmission time-frequency resource and that is used by the terminal to perform uplink transmission, wherein the terminal receives the uplink transmission indication sent by the network side device that includes the correspondence between at least one quantity of OFDM symbols and the to-be-transmitted uplink signal and the quantity of sub-band intervals and the quantity of sub-bands that are used by the terminal to perform uplink transmission; and sending, by the terminal, the uplink signal to the network side device, based on the quantity of sub-bands, the quantity of sub-band intervals, the quantity of OFDM symbols, an ID of an OFDM symbol, and an ID of a sub-band that are in the uplink transmission time-frequency resource and are used by the terminal to perform uplink transmission. 2. The uplink transmission method according to claim 1 , wherein the uplink signal comprises any one of:(1) a reference signal; (2) a reference signal and a control signal; (3) a reference signal and a data signal; or (4) a reference signal, a control signal, and a data signal. 3. The uplink transmission method according to claim 1 , wherein the uplink transmission indication further includes an ID of an OFDM symbol and an ID of a sub-band that are in the uplink transmission time-frequency resource and is used by the terminal to perform uplink transmission; andthe sending, by the terminal, the uplink signal to the network side device includes sending, by the terminal, the uplink signal to the network side device on an uplink time-frequency resource corresponding to the ID of the OFDM symbol and the ID of the sub-band. 4. The uplink transmission method according to claim 1 , wherein the uplink transmission time-frequency resource is allocated by the network side device to at least two terminals, and the terminal is one of the at least two terminals. 5. The uplink transmission method according to claim 2 , wherein the terminal stores a correspondence between a quantity of OFDM symbols, bandwidth used by the terminal to perform uplink transmission, and the to-be-transmitted uplink signal, and wherein the correspondence indicates:a corresponding to-be-transmitted uplink signal is a reference signal when 1≤NsymbUL≤N1, and NRBGF is less than or equal to a preset value; corresponding to-be-transmitted uplink signals are a reference signal and a control signal when 1≤NsymbUL≤N1, and NRBGF is greater than a preset value; corresponding to-be-transmitted uplink signals are a reference signal and a data signal when N2≤NsymbUL≤N3; or corresponding to-be-transmitted uplink signals are a reference signal, a control signal, and a data signal when N4≤NsymbUL≤Nn wherein NsymbUL is a quantity of occupied orthogonal frequency division multiplexing (OFDM) symbols in the uplink transmission time-frequency resource, NRBGF is transmission bandwidth that is included in the uplink transmission time-frequency resource and used by the terminal to perform uplink transmission, and N1 to Nn are positive integers. 6. A terminal, comprising:a memory, configured to store an uplink transmission time-frequency resource allocated by a network side device to the terminal, wherein the uplink transmission time-frequency resource is preconfigured for the terminal and the uplink transmission time-frequency resource includes a quantity of orthogonal frequency division multiplexing (OFDM) symbols and an uplink transmission indication that is preconfigured and includes a preconfigured correspondence between at least one quantity of OFDM symbols and to-be-transmitted uplink signals and a quantity of sub-band intervals and a quantity of sub-bands that are in the uplink transmission time-frequency resource; a processor, configured to determine a to-be-transmitted uplink signal based on the quantity of orthogonal frequency division multiplexing (OFDM) symbols in the uplink transmission time-frequency resource stored in the memory when the terminal needs to send an uplink signal, wherein the terminal stores the correspondence between at least one quantity of OFDM symbols and the to-be-transmitted uplink signal and the correspondence further includes a correspondence between the to-be-transmitted uplink signal and bandwidth that is included the uplink transmission time-frequency resource and that is used by the terminal to perform uplink transmission, wherein the processor receives the uplink transmission indication sent by the network side device that includes the correspondence between at least one quantity of OFDM symbols and the to-be-transmitted uplink signal and the quantity of sub-band intervals and the quantity of sub-bands that are used by the terminal to perform uplink transmission; and a transceiver, configured to send, to the network side device, the uplink signal determined by the processor, wherein the uplink signal is determined based on the quantity of sub-bands, the quantity of sub-band intervals, the quantity of OFDM symbols, an ID of an OFDM symbol, and an ID of a sub-band that are in the uplink transmission time-frequency resource and are used by the terminal to perform uplink transmission. 7. The terminal according to claim 6 , wherein the uplink signal sent by the transceiver comprises any one of:(1) a reference signal; (2) a reference signal and a control signal; (3) a reference signal and a data signal; and (4) a reference signal, a control signal, and a data signal. 8. The terminal according to claim 7 , wherein a correspondence that is stored in the memory and that is between a quantity of OFDM symbols, bandwidth used by the terminal to perform uplink transmission, and the to-be-transmitted uplink signal, and wherein the correspondence indicates:the corresponding to-be-transmitted uplink signal is a reference signal when 1≤NsymbUL≤N1, and NRBGF is less than or equal to a preset value; corresponding transmitted uplink signals are a reference signal and a control signal when 1≤NsymbUL≤N1, and NRBGF is greater than a preset value; corresponding transmitted uplink signals are a reference signal and a data signal when N2≤NsymbUL≤N3, or corresponding transmitted uplink signals are a reference signal, a control signal, and a data signal when N4≤NsymbUL≤Nn, wherein NsymbUL is a quantity of occupied orthogonal frequency division multiplexing (OFDM) symbols in the uplink transmission time-frequency resource, NRBGF is bandwidth that is in the uplink transmission time-frequency resource and used by the terminal to perform uplink transmission, and N1 to Nn are positive integers. 9. A network side device, comprising:a processor to configure an uplink transmission time-frequency resource for a terminal, wherein the uplink transmission time-frequency resource comprises at least one orthogonal frequency division multiplexing (OFDM) symbol, wherein the uplink transmission time-frequency resource is preconfigured for the terminal and the uplink transmission time-frequency resource includes a quantity of orthogonal frequency division multiplexing (OFDM) symbols and an uplink transmission indication that is preconfigured and includes a preconfigured correspondence between at least one quantity of OFDM symbols and to-be-transmitted uplink signals and a quantity of sub-band intervals and a quantity of sub-bands that are in the uplink transmission time-frequency resource; and a transceiver configured to send the uplink transmission indication and the uplink transmission time-frequency resource to the terminal, and receive an uplink signal determined by the terminal according to the uplink transmission indication, wherein the uplink transmission indication comprises the correspondence between at least one quantity of OFDM symbols and a to-be-transmitted uplink signal and the correspondence further includes a correspondence between the to-be-transmitted uplink signal and bandwidth that is included the uplink transmission time-frequency resource and that is used by the terminal to perform uplink transmission, and wherein the uplink transmission indication further includes the quantity of sub-band intervals and the quantity of sub-bands that are in the uplink transmission time-frequency resource used by the terminal to perform uplink transmission and to receive an uplink signal determined by the terminal according to the uplink transmission indication, wherein the uplink signal is determined based on the quantity of sub-bands, the quantity of sub-band intervals, the quantity of OFDM symbols, an ID of an OFDM symbol, and an ID of a sub-band that are in the uplink transmission time-frequency resource and are used by the terminal to perform uplink transmission. 10. The network side device according to claim 9 , wherein the uplink signal comprises any one of:(1) a reference signal; (2) a reference signal and a control signal; (3) a reference signal and a data signal; and (4) a reference signal, a control signal, and a data signal. 11. The network side device according to claim 9 , wherein the uplink transmission indication sent by the transceiver to the terminal further includes an ID of an OFDM symbol and an ID of a sub-band that are in the uplink transmission time-frequency resource and used by the terminal to perform uplink transmission.
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