Communication mode switching method for radio frequency subsystem of mobile communication terminal

Abstract

The invention belongs to the technical field of mobile communication, and particularly relates to a communication mode switching method for a radio frequency subsystem of a mobile communication terminal. The method comprises the following steps: a radio frequency subsystem of the mobile communication terminal enters a sleep state from a current working state in a current communication mode, and a non-core module is closed; immediately starting a 26M clock and frequency synthesizer circuit in a target mode; configuring a radio frequency switch parameter and a transceiver parameter of the target communication mode, and switching a radio frequency subsystem of the mobile communication terminal to a receiving state of the target communication mode; activating a receiving channel in the target mode and performing index measurement; returning or residing after the measurement is finished; the static power consumption of the radio frequency subsystem is obviously reduced, the power consumption waste of an invalid circuit is avoided, and the communication performance is ensured while the cruising ability of the terminal is improved.

Description

Technical Field

[0001] This invention belongs to the field of mobile communication technology, and specifically relates to a method for switching communication modes in the radio frequency subsystem of a mobile communication terminal. Background Technology

[0002] With the development of mobile communication technology, terminal devices need to support multi-mode communication to adapt to different network environments. As the core of communication, the stability, power consumption control, and response speed of the radio frequency (RF) subsystem directly affect the terminal's communication performance and user experience. Existing technologies for multi-mode RF subsystems suffer from problems such as excessive power consumption, inaccurate switching timing, and significant inter-mode switching delays. Especially in multi-network environment switching scenarios, communication interruptions or response lags are prone to occur. Specifically, existing RF subsystem state switching technologies have the following specific defects:

[0003] Power consumption control is inadequate: Non-core circuits are not effectively shut down in non-transmit / receive states (such as sleep or idle modes). For example, some baseband processor peripheral interfaces or clock modules remain operational during standby, resulting in high static leakage current and shortening the terminal's standby time.

[0004] Inaccurate switching timing: Existing solutions lack a unified timing standard when switching between different communication modes. For example, when switching from receiving to transmitting, if the PA (power amplifier) ​​turns on too early before the transceiver is ready, it will cause signal distortion or spectrum sputtering.

[0005] Low efficiency of heterogeneous measurement: When performing heterogeneous system measurements (such as measuring 4G neighbor cell signals under GSM network), the traditional handover process is cumbersome and the switching delay between modes is large, which can easily lead to interruption of current services or dropped calls.

[0006] In summary, there is an urgent need for an optimized method for multi-mode state switching of the radio frequency subsystem of a mobile communication terminal, which can achieve a balance between low power consumption and fast switching while ensuring communication quality. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention proposes a method for switching communication modes in a mobile communication terminal's radio frequency subsystem, the method comprising:

[0008] S1: The mobile communication terminal radio frequency subsystem enters sleep mode from its current working state in the current communication mode and shuts down non-core modules;

[0009] S2: Immediately activate the 26M clock and frequency synthesizer circuit for the target communication mode;

[0010] S3: Configure the RF switch parameters and transceiver parameters for the target communication mode, and switch the mobile communication terminal RF subsystem to the receiving state of the target mode;

[0011] S4: Activate the receiving channel in the target communication mode and perform indicator measurement;

[0012] S5: Return or stay after the measurement is completed;

[0013] The communication modes include GSM, 4G and 5G modes; each communication mode has four working states, namely sleep state, idle state, transmit state and receive state.

[0014] Preferably, the parameter configurations for the four working states in GSM mode include:

[0015] Sleep state: RF_SW [3:0] control is 0, PA's EN is 0, transceiver PDN is 0, Reg30 bit is 0. <15> When the value is 0, the other pins are at any level, and only the core circuit works.

[0016] Idle state: RF_SW [3:0] control is 0, PA's EN is 0, transceiver PDN is 0, Reg30 bit is 0. <6> 0, Reg30 Bit <7> 0, Reg30 Bit <15> When the value is 1, the frequency synthesizer circuit starts.

[0017] Transmission status: Controlled by the combination of BS, Mode, and BAIS pins of PA, depending on the frequency band and transmission mode;

[0018] Transceiver PDN is 1, Reg30 bit <7> 0, Reg30 Bit <6> 1, Reg30 Bit <15> When the value is 1, all modules of the launch channel are operational;

[0019] Receive status: RF_SW [3:0] control is 0, PA's EN is 0, transceiver PDN is 1, Reg30 bit <7> 1, Reg30 Bit <6> When Reg30 Bit<15> is 0, the entire receiving channel module is working.

[0020] Preferably, the parameter configurations for the four working states in 4G mode include:

[0021] Sleep state: RF_SW [3:0] control is 0, PA is all off, transceiver TXON / RXON=0, VCC_TCXO and all clocks are off;

[0022] Idle state: Turn on VCC_TCXO and 26M clock to warm up the circuit, and keep the rest off;

[0023] Transmit status: RF_SW [3:0]=1, PA's EN is 1 or 0, Mode is 1 or 0, BAIS is 1, transceiver TXON=1, RXON=0, clock is fully on;

[0024] Receive status: RF_SW [3:0]=0, PA off, transceiver TXON=0, RXON=1, clock fully on.

[0025] Preferably, the parameter configurations for the four working states in 5G mode include:

[0026] Sleep state: Set all RF_SW[12:4] to 0; set PA's EN and Mode to 0; set transceiver Enable to 0, TXNRX to 0; set AFE1 / 2's / SHDN to 0; turn off the 26M master clock and MCLK, which reduces the current to the uA level and retains only the baseband core circuit.

[0027] Idle state: Keep RF_SW [12:4] and PA off; preset transceiver TXNRX to 1AFE1 / 2 and set / SHDN to 0; turn on 26M clock and start frequency synthesizer circuit, but keep MCLK off to save power;

[0028] Transmit status: RF_SW [12:4] is set to 1; PA and Mode are set to 1; EN is set to 1 or 0 depending on the time slot; Transceiver Enable is set to 1; TXNRX is pulled low to 0; Register REG16 D <1:0> is set to 01; AFE1's / SHDN and TXNRX are set to 1. At this time, 26M and MCLK are fully enabled;

[0029] Receive status: Transceiver register REG1 D <3> Distinguish between receiving states: set to 0 for 1RX receiving mode and set to 1 for 2RX receiving mode.

[0030] Furthermore, in 1RX receive mode, RF_SW [12:4] control is 0, PA's EN and Mode are both 0, transceiver Enable is 1, TXNRX is 1, and REG1 D is 1. <3> With REG16 D<1:0> set to 0, / SHDN of AFE1 set to 1, TXNRX set to 0, 26M clock and MCLK both enabled, single receive channel operation.

[0031] Furthermore, in 2RX receive mode, RF_SW [12:4] control is 0, PA's EN and Mode are both 0, transceiver Enable is 1, TXNRX is 1, and REG1 D is 1. <3> With REG16 D<1:0> set to 1, AFE1's / SHDN set to 1, TXNRX set to 0, both the 26M clock and MCLK are enabled, and AFE2 ( / SHDN=1) is enabled to achieve dual-channel reception.

[0032] Furthermore, the logic low level of each control signal is 0V~0.5V, indicating that the signal is 0; the logic high level is 1.5V~3V, indicating that the signal is 1.

[0033] The beneficial effects of this invention are as follows:

[0034] The sleep and idle states employ a minimized circuit operation strategy (only necessary modules are turned on, and non-core modules are turned off), which significantly reduces the static power consumption of the RF subsystem and improves the terminal's battery life.

[0035] The modules for transmitting and receiving are precisely activated, avoiding the waste of power from invalid circuits while ensuring communication performance.

[0036] The switching timing within and between modes has been optimized, reducing switching latency and improving communication response speed in multi-network environments;

[0037] The control logic adopts standardized high and low level definitions, has strong compatibility, can be applied to various types of RF chips, and has broad application prospects. Attached Figure Description

[0038] Figure 1 This is the state transition diagram for GSM / 4G / 5G modes in this invention;

[0039] Figure 2 This is a diagram illustrating the time consumption for switching between modes in this invention;

[0040] Figure 3 This is a diagram illustrating the 5G state transition time in this invention;

[0041] Figure 4 This is a diagram illustrating the GSM state transition time in this invention;

[0042] Figure 5 This is a diagram illustrating the 4G state transition time in this invention. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] To address the shortcomings of existing technologies, this invention provides a low-power, high-response-speed multi-mode state switching method, namely, a communication mode switching method for a mobile communication terminal radio frequency subsystem. It achieves refined control of circuit modules in each mode by precisely defining the logic levels (0V~0.5V for low, 1.5V~3V for high) and timing coordination between modules. The method includes the following:

[0045] This invention constructs a hardware control architecture, namely the RF subsystem of a mobile communication terminal, comprising a baseband processor, an RF switch (RF_SW), a power amplifier (PA), a transceiver, a clock module (26M / MCLK), a frequency synthesizer circuit, and an analog front-end (AFE). For the three communication modes of GSM, 4G, and 5G, four states are defined respectively: Sleep, Idle, Transmit (TX), and Receive (RX).

[0046] like Figure 1 As shown, the specific switching process of the mobile communication terminal radio frequency subsystem communication mode switching method includes:

[0047] S1: The mobile communication terminal radio frequency subsystem enters sleep mode from the current working state in the current communication mode and shuts down non-core modules.

[0048] The core modules are the SPI control lines and related internal registers, while the remaining modules are non-core modules.

[0049] S2: Immediately activate the 26M clock and frequency synthesizer circuit for the target communication mode.

[0050] S3: Configure the RF switch parameters and transceiver parameters for the target communication mode, and switch the mobile communication terminal RF subsystem to the receiving state of the target mode.

[0051] The working states under the three communication modes are as follows:

[0052] GSM mode transmit status is further subdivided: including GSM, DCS / PCS, and EDGE modes, which are distinguished by the combination of BS, Mode, and BAIS pin levels of the PA.

[0053] The parameter configurations for the four working states in GSM mode include:

[0054] Sleep state: RF_SW [3:0] (RF switch control word) is 0, PA's EN (enable) is 0, transceiver PDN (power control network) is 0, Reg30 (register 30) bit is 0. <15> When the value is 0, the other pins are at any level, and only the core circuit works.

[0055] Idle state: RF_SW [3:0] control is 0, PA's EN is 0, transceiver PDN is 0, Reg30 bit is 0. <6> 0, Reg30 Bit <7> 0, Reg30 Bit <15> When the value is 1, the frequency synthesizer circuit starts.

[0056] Transmit status: Controlled by the combination of BS, Mode, and BAIS pins of the PA, depending on the frequency band and transmit mode; transceiver PDN is 1, Reg30 bit. <7> 0, Reg30 Bit <6> 1, Reg30 Bit <15> When the value is 1, all modules of the launch channel are operational;

[0057] Receive status: RF_SW [3:0] control is 0, PA's EN is 0, transceiver PDN is 1, Reg30 bit <7> 1, Reg30 Bit <6> When Reg30 Bit<15> is 0, the entire receiving channel module is working.

[0058] Table 1 shows the control signal parameters for the four operating states in GSM mode.

[0059] Table 1 Parameter Control Table

[0060]

[0061] The parameter configurations for the four working states in 4G mode include:

[0062] Sleep state: RF_SW [3:0] control is 0, PA is all off, transceiver TXON / RXON=0, VCC_TCXO and all clocks are off;

[0063] Idle state: Turn on VCC_TCXO and 26M clock to warm up the circuit, and keep the rest off;

[0064] Transmit status: RF_SW [3:0]=1, PA's EN is 1 or 0, Mode is 1 or 0, BAIS is 1, transceiver TXON=1, RXON=0, clock is fully on;

[0065] Receive status: RF_SW [3:0]=0, PA off, transceiver TXON=0, RXON=1, clock fully on.

[0066] The parameter configurations for the four working states in 5G mode include:

[0067] 5G mode reception status is divided into 1RX (single receive) and 2RX (dual receive). This is determined by the transceiver register REG1 D. <3> Distinguishing features: Setting 0 is 1RX, setting 1 is 2RX.

[0068] Sleep state: Set all RF_SW[12:4] to 0; set PA's EN and Mode to 0; set transceiver Enable to 0, TXNRX to 0; set AFE1 / 2's / SHDN to 0; turn off the 26M master clock and MCLK, which reduces the current to the uA level and retains only the baseband core circuit.

[0069] Idle state: Keep RF_SW [12:4] and PA off; preset transceiver TXNRX to 1AFE1 / 2 and set / SHDN to 0; turn on 26M clock and start frequency synthesizer circuit, but keep MCLK off to save power;

[0070] Transmit status: RF_SW [12:4] is set to 1; PA and Mode are set to 1; EN is set to 1 or 0 depending on the time slot; Transceiver Enable is set to 1; TXNRX is pulled low to 0; Register REG16 D <1:0> is set to 01; AFE1's / SHDN and TXNRX are set to 1. At this time, 26M and MCLK are fully enabled;

[0071] Receive status: Transceiver register REG1 D <3> Distinguish between receive states: set to 0 for 1RX receive mode, and set to 1 for 2RX receive mode; specifically:

[0072] In 1RX receive mode, RF_SW [12:4] control is 0, PA's EN and Mode are both 0, transceiver Enable is 1, TXNRX is 1, and REG1 D is 1. <3> With REG16 D<1:0> set to 0, / SHDN of AFE1 set to 1, TXNRX set to 0, 26M clock and MCLK both enabled, single receive channel operation.

[0073] In 2RX receive mode, RF_SW [12:4] control is 0, PA's EN and Mode are both 0, transceiver Enable is 1, TXNRX is 1, and REG1 D is 1. <3> With REG16 D<1:0> set to 1, AFE1's / SHDN set to 1, TXNRX set to 0, both the 26M clock and MCLK are enabled, and AFE2 ( / SHDN=1) is enabled to achieve dual-channel reception.

[0074] In this invention, the logic low level of each control signal (the control word of each module) is 0V~0.5V, indicating that the signal is 0; the logic high level is 1.5V~3V, indicating that the signal is 1.

[0075] S4: Activate the receiving channel in the target communication mode and perform indicator measurement.

[0076] The metrics include sensitivity, noise figure, and gain flatness.

[0077] S5: Return or stay after the measurement is completed.

[0078] For example, the process of switching from GSM mode sleep state to 4G mode reception state for measurement (inter-mode switching) includes:

[0079] The initial state is GSM sleep state, RF_SW [3:0]=0, PA's EN=0, transceiver PDN=0, Reg30 bit <15> =0, 26M clock and MCLK are both OFF;

[0080] Start the mode switching process, turn off the GSM mode related circuits, turn on the 26M clock and VCC_TCXO of 4G mode, and configure RF_SW [3:0]=0;

[0081] The PA's EN, Mode, and BAIS are all 0, the transceiver's RXON=1 and TXON=0, and the MCLK clock is enabled.

[0082] Waiting for the switching timing to stabilize (e.g.) Figure 2 (As shown by the time parameters), complete the switch from GSM sleep state to 4G reception state and enter heterogeneous measurement mode.

[0083] In some preferred embodiments of the present invention, the process of switching from single-antenna reception (1RX) to transmission (TX) in 5G mode is as follows:

[0084] Step 1 (Initial State):

[0085] The system is in 1RX state. Check and confirm that RF_SW[12:4] is low, PA is off, REG1 D <3> =0, REG16D<1:0>=01, AFE1's / SHDN=1, TXNRX=0, 26M clock and MCLK are both ON (receive mode).

[0086] Step 2 (Triggering the switch):

[0087] The baseband processor sends a transmit request;

[0088] Step 3 (Timing Action): At time T0: RF_SW[12:4] is pulled high to 1.5V-3V to turn on the transmission path.

[0089] At time T1: Pull the transceiver's TXNRX pins down from high level to 0V-0.5V to switch the transceiver's internal path.

[0090] At time T2: Set the Mode pin of PA to 1 and control the EN pin according to power requirements;

[0091] Step 4 (Stabilization): Wait for the preset stabilization time (e.g., 5μs-10μs, etc.). Figure 3After that, data transmission begins.

[0092] The process and corresponding state control for switching from single-antenna receive (1RX) to transmit (TX) in other modes are similar to those in 5G mode. The state transition time in GSM mode is as follows: Figure 4 As shown, the state transition time in 4G mode is as follows: Figure 5 As shown.

[0093] In summary, this invention refines the operating states of GSM, 4G, and 5G modes and optimizes the control logic of the RF switch, power amplifier, transceiver, and clock module in each state. This significantly reduces the static power consumption of the RF subsystem and improves terminal battery life. Precise module activation in transmit and receive states avoids wasted power from ineffective circuits while ensuring communication performance. This invention is highly compatible and applicable to various RF chip models, demonstrating broad application prospects.

[0094] The above-described embodiments further illustrate the purpose, technical solution, and advantages of the present invention. It should be understood that the above-described embodiments are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made to the present invention within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for switching communication modes in a mobile communication terminal's radio frequency subsystem, characterized in that, include: S1: The mobile communication terminal radio frequency subsystem enters sleep mode from its current working state in the current communication mode and shuts down non-core modules; S2: Immediately activate the 26M clock and frequency synthesizer circuit for the target communication mode; S3: Configure the RF switch parameters and transceiver parameters for the target communication mode, and switch the mobile communication terminal RF subsystem to the receiving state of the target mode; S4: Activate the receiving channel in the target communication mode and perform indicator measurement; S5: Return or stay after the measurement is completed; The communication modes include GSM, 4G, and 5G. Each communication mode has four working states: sleep, idle, transmit, and receive.

2. The method for switching communication modes in a mobile communication terminal radio frequency subsystem according to claim 1, characterized in that, The parameter configurations for the four working states in GSM mode include: Sleep state: RF_SW [3:0] control is 0, PA's EN is 0, transceiver PDN is 0, Reg30 bit is 0. <15> When the value is 0, the other pins are at any level, and only the core circuit works. Idle state: RF_SW [3:0] control is 0, PA's EN is 0, transceiver PDN is 0, Reg30 bit is 0. <6> 0, Reg30Bit <7> 0, Reg30 Bit <15> When the value is 1, the frequency synthesizer circuit starts. Transmission status: Controlled by the combination of BS, Mode, and BAIS pins of PA, depending on the frequency band and transmission mode; Transceiver PDN is 1, Reg30 bit <7> 0, Reg30 Bit <6> 1, Reg30 Bit <15> When the value is 1, all modules of the launch channel are operational; Receive status: RF_SW [3:0] control is 0, PA's EN is 0, transceiver PDN is 1, Reg30 bit <7> 1, Reg30Bit <6> When Reg30 Bit<15> is 0, the entire receiving channel module is working.

3. The method for switching communication modes in a mobile communication terminal radio frequency subsystem according to claim 1, characterized in that, The parameter configurations for the four working states in 4G mode include: Sleep state: RF_SW [3:0] control is 0, PA is all off, transceiver TXON / RXON=0, VCC_TCXO and all clocks are off; Idle state: Turn on VCC_TCXO and 26M clock to warm up the circuit, and keep the rest off; Transmit status: RF_SW [3:0]=1, PA's EN is 1 or 0, Mode is 1 or 0, BAIS is 1, transceiver TXON=1, RXON=0, clock is fully on; Receive status: RF_SW [3:0]=0, PA off, transceiver TXON=0, RXON=1, clock fully on.

4. The method for switching communication modes in a mobile communication terminal radio frequency subsystem according to claim 1, characterized in that, The parameter configurations for the four working states in 5G mode include: Sleep state: Set all RF_SW[12:4] to 0; set PA's EN and Mode to 0; set transceiver Enable to 0, TXNRX to 0; set AFE1 / 2's / SHDN to 0; turn off the 26M master clock and MCLK, which reduces the current to the uA level and retains only the baseband core circuit. Idle state: Keep RF_SW [12:4] and PA off; preset transceiver TXNRX to 1AFE1 / 2 and set / SHDN to 0; turn on 26M clock and start frequency synthesizer circuit, but keep MCLK off to save power; Transmit status: RF_SW [12:4] is set to 1; PA and Mode are set to 1; EN is set to 1 or 0 depending on the time slot; Transceiver Enable is set to 1; TXNRX is pulled low to 0; Register REG16 D <1:0> is set to 01; AFE1's / SHDN and TXNRX are set to 1. At this time, 26M and MCLK are fully enabled; Receive status: Transceiver register REG1 D <3> Distinguish between receiving states: set to 0 for 1RX receiving mode and set to 1 for 2RX receiving mode.

5. The method for switching communication modes in a mobile communication terminal radio frequency subsystem according to claim 4, characterized in that, In 1RX receive mode, RF_SW [12:4] control is 0, PA's EN and Mode are both 0, transceiver Enable is 1, TXNRX is 1, and REG1 D is 1. <3> With REG16 D<1:0> set to 0, / SHDN of AFE1 set to 1, TXNRX set to 0, 26M clock and MCLK both enabled, single receive channel operation.

6. The method for switching communication modes in a mobile communication terminal radio frequency subsystem according to claim 4, characterized in that, In 2RX receive mode, RF_SW [12:4] control is 0, PA's EN and Mode are both 0, transceiver Enable is 1, TXNRX is 1, and REG1 D is 1. <3> With REG16 D<1:0> set to 1, AFE1's / SHDN set to 1, TXNRX set to 0, both the 26M clock and MCLK are enabled, and AFE2 ( / SHDN=1) is enabled to achieve dual-channel reception.

7. A method for switching communication modes in a mobile communication terminal radio frequency subsystem according to any one of claims 2 to 6, characterized in that, Each control signal has a logic low level of 0V~0.5V, indicating a signal of 0; and a logic high level of 1.5V~3V, indicating a signal of 1.

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