CN117014021A - Method for adjusting the transmit power ratio of a radio module and radio module - Google Patents

Abstract

A method for adjusting a transmit power ratio of a radio module and a radio module. There is provided a method for adjusting a Transmit (TX) power ratio of a radio module, the method comprising: mapping Radio Frequency (RF) exposure limits to TX power limits; interacting with at least one other radio module for adjusting the TX power ratio to obtain an adjusted TX power ratio; and adjusting the TX power limit according to the adjusted TX power ratio to generate an adjusted TX power limit for the radio module.

Description

Method for adjusting the transmit power ratio of a radio module and radio module

Cross Reference to Related Applications

The present application claims the benefit of U.S. provisional application No.63/337,639 filed on 5/3/2022 and U.S. patent application No.18/131,874 filed on 7/4/2023. The entire contents of the above application are incorporated herein by reference.

Technical Field

The present application relates to Radio Frequency (RF) technology, and more particularly, to a method for adjusting a Transmit (TX) power ratio of a radio module and an associated radio module.

Background

Today, RF technology often occurs in user equipment (UE; such as mobile phones). However, excessive RF exposure may cause injury to the human body. Thus, the time-averaged (time-averaged) RF exposure limits are specified by the authorities in different countries (e.g., federal communications commission (federal communications commission, FCC) in the united states, innovation, science, and economic development, ISED) in canada, and the european union committee (conformite europeenne, CE) in europe to limit the time-averaged RF exposure of radio modules in UEs. For example, in response to the frequency band of the radio module being less than 6GHz, the time-averaged RF exposure will be quantified in terms of time-averaged specific absorption rate (specific absorption rate, SAR), while in response to the frequency band of the radio module being not less than 6GHz, the time-averaged RF exposure will be quantified in terms of time-averaged Power Density (PD). In addition, since the time-averaged RF exposure will be proportional to the TX power of the radio module, the time-averaged RF exposure may meet the time-averaged RF exposure limit by controlling the TX power.

For simultaneous multi-radio access technology (multi-radio access technology, multi-RAT) transmissions (e.g., 2G, 3G, 4G, FR1, FR2, wireless fidelity (wireless fidelity, wi-Fi), and Bluetooth (BT)), the official regulations must be less than or equal to 1 (i.e., ter.ltoreq.1). How to correctly allocate TX power of multiple radio modules in a UE to meet both regulatory and performance requirements has become an important issue. For the conventional TX power allocation method, only the maximum available TX power ratio is allocated to a plurality of radio modules having a predetermined fixed ratio. A disadvantage is that even if any one of the plurality of radio modules only needs a TX power ratio (i.e. one radio module will have an unused TX power margin) that is less than the predetermined fixed ratio (ratio), other ones of the plurality of radio modules may not be able to utilize the TX power margin, which will reduce the ratio efficiency and performance. Thus, there is an urgent need for a novel method for adjusting the TX power ratio of a radio module and an associated radio module.

Disclosure of Invention

It is therefore an object of the present application to provide a method for adjusting the transmit TX power ratio of a radio module and an associated radio module to solve the above mentioned problems.

According to an embodiment of the present application, a method for adjusting a TX power ratio of a radio module is provided. The method comprises the following steps: mapping the RF exposure limit to a TX power limit; interacting with at least one other radio module to adjust the TX power ratio to obtain an adjusted TX power ratio; and adjusting the TX power limit according to the adjusted TX power ratio to generate an adjusted TX power limit for the radio module.

According to an embodiment of the present application, a radio module for adjusting a TX power ratio of the radio module is provided. The radio module is arranged to: mapping the RF exposure limit to a TX power limit; interacting with at least one other radio module to adjust the TX power ratio to obtain an adjusted TX power ratio; and adjusting the TX power limit according to the adjusted TX power ratio to generate an adjusted TX power limit for the radio module.

One of the benefits of the present application is that, with the method and associated radio modules of the present application, at the outset, under conditions where any one of the plurality of radio modules only needs a TX power ratio that is less than a predetermined fixed ratio (i.e., one radio module will have an unused TX power headroom), other ones of the plurality of radio modules can utilize the TX power headroom to dynamically adjust the TX power ratio of the other ones of the plurality of radio modules and the TX power ratio of the any one of the plurality of radio modules (e.g., increase the TX power ratio of the other ones of the plurality of radio modules and decrease the TX power ratio of the any one of the plurality of radio modules). Thereafter, other ones of the plurality of radio modules can utilize the TX power headroom for further dynamic adjustment under conditions where the any one of the plurality of radio modules still only needs a current TX power ratio that is less than the previously adjusted TX power ratio (i.e., the one radio module still has unused TX power headroom). In this way, ratio efficiency and performance may be improved.

These and other objects of the present application will no doubt become obvious to those of ordinary skill in the art after having read the following detailed description of the preferred embodiments which are illustrated in the various drawing figures.

Drawings

Fig. 1 is a schematic diagram illustrating an adjustment scheme between two radio modules according to an embodiment of the present application.

Fig. 2 is a schematic diagram illustrating a control scheme of instantaneous power of a radio module according to an embodiment of the present application.

Fig. 3 is a flow chart of a method for adjusting a TX power ratio of a radio module according to an embodiment of the present application.

Detailed Description

Certain terms are used throughout the following description and claims to refer to particular components. As will be apparent to those skilled in the art, electronic device manufacturers may refer to a component by different names. This document does not intend to distinguish between components that differ in name but not function. In the following description and claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "including, but not limited to … …".

Fig. 1 is a schematic diagram illustrating an adjustment scheme between two radio modules 100 and 102 according to an embodiment of the present application. By way of example and not limitation, radio modules 100 and 102 may include communication circuitry corresponding to sub-6, millimeter wave (mmWave), wi-Fi, BT, zigbee, global positioning system (global positioning system, GPS), internet of vehicles (vehicle to everything, V2X), and non-terrestrial network (non-terrestrial network, NTN). For example, the radio modules 100 and 102 may be cellular modules and connection modules, respectively, wherein the cellular modules may correspond to sub-6 and mmWave, the connection modules may correspond to Wi-Fi and BT, and the cellular modules and connection modules may be provided on different chips, respectively. However, this is merely for illustration, and the present application is not limited thereto.

As shown in fig. 1, the processing module 104 may comprise circuitry arranged to receive weighting information weight_1 for assigning the TX power ratio TXR1 of the radio module 100 and the TX power ratio TXR2 of the radio module 102 from a user or a different scenario. For example, the weighting information weight_i may be a predetermined fixed ratio for TX power ratios TXR1 and TXR2 from a user or different scenarios. It should be noted that the processing module 104 may be implemented by one of the radio modules 100 and 102 (i.e. the processing module 104 may be part of the radio module 100 or the radio module 102), and that the processing module 104 may also be arranged to interact with the other of the radio modules 100 and 102 to receive at least one message from said other of the radio modules 100 and 102 for dynamically adjusting the TX power ratios TXR1 and TXR2. In this embodiment, the dynamic adjustment of the TX power ratio is performed between two radio modules (e.g., radio modules 100 and 102). However, this is for illustrative purposes only and is not intended to be a limitation on the present application. In some implementations, dynamic adjustment of the TX power ratio may be performed between more than two radio modules. In practice, the processing module 104 may employ any radio module capable of interacting with at least one other radio module to receive at least one message and dynamically adjusting the TX power ratio of any radio module based at least on the at least one message. These alternative designs all fall within the scope of the application.

In this embodiment, the radio module 100 may be arranged to receive a time-averaged RF exposure limit (hereinafter referred to as "RF exposure limit" for brevity) specified by the authorities, wherein the RF exposure limit corresponds to the radio module 100. Since the RF exposure limit is proportional to the TX power of the radio module 100, the radio module 100 may also be arranged to map the RF exposure limit to the TX power limit TPL1 of the radio module 100. Specifically, the RF exposure limit may be a total exposure ratio (total exposure ratio, TER), where TER may include a normalized average specific absorption rate (specific absorption rate, SAR) limit and a normalized average Power Density (PD) limit, and is required to be less than or equal to 1 (i.e., ter+.1). The radio module 100 may utilize testing or simulation to find a first normalized average TX power limit mapped to a normalized average SAR limit and a second normalized average TX power limit mapped to a normalized average PD limit, where the TX power limit TPL1 includes the first normalized average TX power limit and the second normalized average TX power limit. However, this is merely for illustration, and the present application is not limited thereto. In some implementations, the user may directly utilize testing or simulation to find TX power limit TPL1. That is, the RF exposure limits may also be mapped directly to the TX power limit TPL1 of the radio module 100 by the user. Similarly, the radio module 102 may be arranged to receive an RF exposure limit specified by the authorities, wherein the RF exposure limit corresponds to the radio module 102. Since the RF exposure limit is proportional to the TX power of the radio module 102, the radio module 102 may also be arranged to map the RF exposure limit to the TX power limit TPL2 of the radio module 102. However, this is merely for illustration, and the present application is not limited thereto. In some implementations, the user may directly utilize testing or simulation to find the TX power limit TPL2. That is, the RF exposure limit may also be mapped directly to the TX power limit TPL2 of the radio module 102 by the user.

Under the scenario where processing module 104 is implemented by radio module 100, processing module 104 may interact with radio module 102 to receive at least one message M2 from radio module 102 and adjust TX power ratios TXR1 and TXR2 based at least on the at least one message M2 to obtain adjusted TX power ratios a_txr1 and a_txr2, respectively. For example, processing module 104 may adjust TX power ratios TXR1 and TXR2 based only on the at least one message M2 to obtain adjusted TX power ratios a_txr1 and a_txr2, respectively. For another example, processing module 104 may adjust TX power ratios TXR1 and TXR2 based on both at least one message M1 and at least one message M2 calculated by radio module 100 to obtain adjusted TX power ratios a_txr1 and a_txr2, respectively. It should be noted that in some implementations, in the event that the processing module 104 is not able to receive the at least one message M2 from the radio module 102 for some reason, the processing module 104 may adjust the TX power ratios TXR1 and TXR2 based only on the at least one message M1 to obtain adjusted TX power ratios a_txr1 and a_txr2, respectively. In some implementations, after the processing module 104 receives the at least one message M2 from the radio module 102 by interacting with the radio module 102, the at least one message M2 may be stored in a memory (not shown in fig. 1), and the processing module 104 may adjust the TX power ratios TXR1 and TXR2 based only on the at least one message M1 to obtain adjusted TX power ratios a_txr1 and a_txr2, respectively. These alternative designs all fall within the scope of the application. The radio module 100 may be arranged to adjust the TX power limit TPL1 according to the adjusted TX power ratio a TXR1 to generate an adjusted TX power limit ATPL1 for the radio module 100.

In addition, under the scenario where processing module 104 is implemented by radio module 102, processing module 104 may interact with radio module 100 to receive at least one message M1 from radio module 100 and adjust TX power ratios TXR1 and TXR2 based at least on the at least one message M1 to obtain adjusted TX power ratios a_txr1 and a_txr2, respectively. For example, processing module 104 may adjust TX power ratios TXR1 and TXR2 based only on the at least one message M1 to obtain adjusted TX power ratios a_txr1 and a_txr2, respectively. For another example, processing module 104 may adjust TX power ratios TXR1 and TXR2 based on both the at least one message M1 and the at least one message M2 calculated by radio module 102 to obtain adjusted TX power ratios a_txr1 and a_txr2, respectively. It should be noted that in some implementations, in the event that the processing module 104 is not able to receive the at least one message M1 from the radio module 100 for some reason, the processing module 104 may adjust the TX power ratios TXR1 and TXR2 based only on the at least one message M2 to obtain adjusted TX power ratios a_txr1 and a_txr2, respectively. In some implementations, after the processing module 104 receives the at least one message M1 from the radio module 100 by interacting with the radio module 100, the at least one message M1 may be stored in a memory (not shown in fig. 1), and the processing module 104 may adjust the TX power ratios TXR1 and TXR2 based only on the at least one message M2 to obtain adjusted TX power ratios a_txr1 and a_txr2, respectively. These alternative designs all fall within the scope of the application. The radio module 102 may be arranged to adjust the TX power limit TPL2 according to the adjusted TX power ratio a TXR2 to generate an adjusted TX power limit ATPL2 for the radio module 102.

The at least one message M1 and the at least one message M2 may include an on/off state of the radio module 100 and an on/off (on/off) state of the radio module 102, respectively, wherein the off state indicates that the corresponding radio module is not performing TX operation for a period of time (e.g., the corresponding radio module is in a shutdown mode, a flight mode, a sleep mode, a discontinuous transmission (discontinuous transmission, DTX) mode, a call drop mode, or a subscriber identity module (subscriber identity module, SIM) card mode), and the on state indicates that the corresponding radio module is not in the off state. For example, when the corresponding radio module is not in a shutdown mode, a flight mode, a sleep mode, a DTX mode, a dropped call mode, or a SIM card free mode, the corresponding radio module is in an on state. In addition, each of the at least one message M1 and the at least one message M2 may further include some information of the corresponding radio module. By way of example and not limitation, the information of the corresponding radio module may include: a previous TX power ratio, a TX power ratio margin (margin), one or more TX performance indicators (performance indices), one or more Reception (RX) performance indicators, one or more weighting information (e.g., weighting information weight_i), or one or more configurations.

The one or more TX performance metrics may include at least one of: the duty cycle of the TX, the error vector magnitude of the TX (error vector magnitude, EVM), the target power, throughput, modulation and coding scheme (modulation and coding scheme, MCS), block error rate (BLER), resource Block (RB), transport block size (transmission block size, TBS), and TX packet error rate (TX packet error rate, TX PER). The one or more RX performance metrics may include at least one of: the duty cycle of the RX, the Modulation and Coding Scheme (MCS), the block error rate (BLER), the Resource Block (RB), the received signal strength indication (received signal strength indication, RSSI), the reference signal received power (reference signal receiving power, RSRP), the signal-to-noise ratio (signal to noise ratio, SNR), the signal-to-interference-plus-noise ratio (SINR), and the RX packet error rate (RX packet error rate, RX PER). The one or more configurations may be related to at least one of: antennas, frequency bands, beams, technologies, sub-bands (sub-band), one or more exposure condition indicators (exposure condition indices), simultaneous transmission status (simultaneous transmitted state), mobile country code (mobile country code, MCC), mobile network code (mobile network code, MNC), modulation, bandwidth, maximum power reduction (maximum power reduction, MPR), path, duty cycle, and combination of frequency bands and SIMs.

In detail, under the scheme in which the processing module 104 is implemented by the radio module 100, the processing module 104 may interact with the radio module 102 at the beginning to receive the on/off state of the radio module 102 included in the at least one message M2. In response to the on/off state indicating that the radio module 102 is off, the processing module 104 may allocate a portion of the TX power ratio TXR2 of the radio module 102 (e.g., a portion of the TX power ratio TXR2 other than the power ratio corresponding to the amount of power reserved) to the TX power ratio TXR1 of the radio module 100, or allocate all of the TX power ratio TXR2 of the radio module 102 to the TX power ratio TXR1 of the radio module 100, with the radio module 102 reserving an amount of power as needed, to obtain adjusted TX power ratios a_txr1 and a_txr2, wherein the margin may be dynamically calculated from the at least one message M1 and/or the at least one message M2. In response to the on/off state indicating that the radio module 102 is on, the processing module 104 may interact with the radio module 102 to receive information of the radio module 102 included in the at least one message M2 and dynamically adjust the TX power ratio TXR1 of the radio module 100 and the TX power ratio TXR2 of the radio module 102 to obtain adjusted TX power ratios a_txr1 and a_txr2, respectively, based on the information of the radio module 102 and the information of the radio module 100 included in the at least one message M1 calculated by the radio module 100. For example, where the weighting information weight_i indicates that the predetermined fixed ratio of the radio module 102 is 0.4 and the actual used TX power ratio of the radio module 102 is 0.2, the TX power ratio margin of the radio module 102 is 0.2, and the processing module 104 may allocate the TX power ratio margin of the radio module 102 to the radio module 100 for dynamically adjusting the TX power ratios TXR1 and TXR2 to obtain adjusted TX power ratios a_txr1 and a_txr2, respectively (e.g., increasing the TX power ratio txr1 and correspondingly decreasing the TX power ratio TXR2 to obtain adjusted TX power ratios a_txr1 and a_txr2, respectively). Thereafter, the radio module 100 may adjust the TX power limit TPL1 according to the adjusted TX power ratio a_txr1 to generate an adjusted TX power limit ATPL1 for the radio module 100.

Similarly, under the scenario where the processing module 104 is implemented by the radio module 102, at the beginning, the processing module 104 may interact with the radio module 100 to receive the on/off state of the radio module 100 included in the at least one message M1. In response to the on/off state indicating that radio module 100 is off, processing module 104 may allocate a portion of the TX power ratio TXR1 of radio module 100 (e.g., a portion of the TX power ratio TXR1 other than the power ratio corresponding to the amount of power reserved) to TX power ratio TXR2 of radio module 102, or allocate all of the TX power ratio TXR1 of radio module 100 to TX power ratio TXR2 of radio module 102, with radio module 100 reserving an amount of power as needed, to obtain adjusted TX power ratios a_txr1 and a_txr2, wherein the margin may be dynamically calculated from the at least one message M1 and/or the at least one message M2. In response to the on/off state indicating that the radio module 100 is on, the processing module 104 may interact with the radio module 100 to receive information of the radio module 100 included in the at least one message M1 and dynamically adjust the TX power ratio TXR1 of the radio module 100 and the TX power ratio TXR2 of the radio module 102 to obtain adjusted TX power ratios a_txr1 and a_txr2, respectively, according to the information of the radio module 100 and the information of the radio module 102 included in the at least one message M2 calculated by the radio module 102. Thereafter, the radio module 102 may adjust the TX power limit TPL2 according to the adjusted TX power ratio a_txr2 to generate an adjusted TX power limit ATPL2 for the radio module 102.

After generating the adjusted TX power limit ATPL1, the radio module 100 may control the instantaneous power (instantaneous power, IP) of the radio module 100 such that the average power AVP of the radio module 100 is lower than or equal to the adjusted TX power limit ATPL1. Similarly, after generating adjusted TX power limit ATPL2, radio module 102 may control instantaneous power IP of radio module 102 such that average power AVP of radio module 102 is less than or equal to adjusted TX power limit ATPL2. Specifically, please refer to fig. 2. Fig. 2 is a schematic diagram illustrating a control scheme of instantaneous power of the radio module 100/102 according to an embodiment of the present application, wherein the horizontal axis in the schematic diagram represents time and the vertical axis in the schematic diagram represents TX power of the radio module 100/102. As shown in fig. 2, to comply with regulations regarding RF exposure limits, the radio module 100/102 may be arranged to control the upper limit of the instantaneous power IP of the radio module 100/102 to be below the upper power limit p_cap such that the average power AVP of the radio module 100/102 is lower than or equal to the adjusted TX power limit ATPL1/ATPL2. Since the operation of the upper power limit p_cap is well known to those skilled in the art, and the focus of the present application is to dynamically adjust the TX power ratio TXR1/TXR2 of the radio module 100/102, details of the operation of the upper power limit p_cap will be omitted for brevity.

After controlling the average power AVP of the radio module 100 to be lower than or equal to the adjusted TX power limit ATPL1 of the radio module 100, the radio module 100 may also be arranged to calculate the at least one message M1 of the radio module 100 for interaction with the radio module 102. For example, radio module 100 may calculate a previous TX power ratio, a TX power ratio margin, one or more TX performance metrics, one or more RX performance metrics, one or more weighting information, or one or more configurations. Similarly, after controlling the average power AVP of the radio module 102 to be lower than or equal to the adjusted TX power limit ATPL2 of the radio module 102, the radio module 102 may also be arranged to calculate the at least one message M2 of the radio module 102 for interaction with the radio module 100. Similar descriptions of the embodiments are omitted for the sake of brevity.

Fig. 3 is a flow chart of a method for adjusting a TX power ratio of a radio module according to an embodiment of the present application. The steps need not be performed in the exact order shown in fig. 3, as long as the results are substantially the same. For example, the method shown in fig. 3 may be employed by the radio module 100, the radio module 102, and the processing module 104 shown in fig. 1.

In step S300, the radio module 100 maps the RF exposure limit corresponding to the radio module 100 to the TX power limit TPL1. Similarly, radio module 102 maps RF exposure limits corresponding to radio module 102 to TX power limit TPL2.

In step S302, when the processing module 104 is implemented by the radio module 100, the on/off state of the radio module 102 included in the at least one message M2 is received by interacting with the radio module 102. Thereafter, it is determined whether the on/off state indicates that the radio module 102 is on. If yes, go to step S304; if not, the process advances to step S303. In addition, when the processing module 104 is implemented by the radio module 102, the on/off state of the radio module 100, which is included in the at least one message M1, is received by interacting with the radio module 100. Thereafter, it is determined whether the on/off state indicates that the radio module 100 is on. If yes, go to step S304; if not, the process advances to step S303.

In step S303, when the processing module 104 is implemented by the radio module 100, in response to the on/off state indicating that the radio module 102 is off, a portion of the TX power ratio TXR2 of the radio module 102 (e.g., a power ratio portion of the TX power ratio TXR2 other than the power ratio corresponding to the reserved power amount) may be allocated to the TX power ratio TXR1 of the radio module 100, or the entirety of the TX power ratio TXR2 of the radio module 102 may be allocated to the TX power ratio TXR1 of the radio module 100, with the radio module 102 reserving a certain amount of power as needed, to obtain adjusted TX power ratios a_txr1 and a_txr2. In addition, when the processing module 104 is implemented by the radio module 102, in response to an on/off state indicating that the radio module 100 is off, a portion of the TX power ratio TXR1 of the radio module 100 (e.g., a power ratio portion of the TX power ratio TXR1 other than the power ratio corresponding to the reserved amount of power) may be allocated to the TX power ratio TXR2 of the radio module 102, or the entirety of the TX power ratio TXR1 of the radio module 100 may be allocated to the TX power ratio TXR2 of the radio module 102, with the radio module 100 reserving a certain amount of power as needed, to obtain adjusted TX power ratios a_txr1 and a_txr2.

In step S304, when the processing module 104 is implemented by the radio module 100, the information of the radio module 102 included in the at least one message M2 is received by interacting with the radio module 102 in response to the on/off state indicating that the radio module 102 is on, and the TX power ratio TXR1 of the radio module 100 and the TX power ratio TXR2 of the radio module 102 are dynamically adjusted according to the information of the radio module 102 and the information of the radio module 100 included in the at least one message M1 to obtain adjusted TX power ratios a_txr1 and a_txr2, respectively. In addition, when the processing module 104 is implemented by the radio module 102, information of the radio module 100 included in the at least one message M1 is received by interacting with the radio module 100 in response to an on/off state indicating that the radio module 100 is on, and the TX power ratio TXR1 of the radio module 100 and the TX power ratio TXR2 of the radio module 102 are dynamically adjusted according to the information of the radio module 100 and the information of the radio module 102 included in the at least one message M2 to obtain adjusted TX power ratios a_txr1 and a_txr2.

In step S306, the radio module 100 adjusts the TX power limit TPL1 according to the adjusted TX power ratio a_txr1 to generate an adjusted TX power limit ATPL1. Similarly, radio module 102 adjusts TX power limit TPL2 according to adjusted TX power ratio a_txr2 to generate adjusted TX power limit ATPL2.

In step S308, the radio module 100 controls the instantaneous power IP of the radio module 100 such that the average power AVP of the radio module 100 is lower than or equal to the adjusted TX power limit ATPL1. Similarly, the radio module 102 controls the instantaneous power IP of the radio module 102 such that the average power AVP of the radio module 102 is lower than or equal to the adjusted TX power limit ATPL2.

In step S310, after controlling the average power AVP of the radio module 100 to be lower than or equal to the adjusted TX power limit ATPL1 of the radio module 100, the radio module 100 calculates the at least one message M1 of the radio module 100 for interaction with the radio module 102. Similarly, after controlling the average power AVP of radio module 102 to be less than or equal to the adjusted TX power limit ATPL2 of radio module 102, radio module 102 calculates the at least one message M2 of radio module 102 for interaction with radio module 100.

Since the details of these steps can be easily understood by those skilled in the relevant art after reading the paragraphs above for the radio module 100, the radio module 102, and the processing module 104 shown in fig. 1, further description is omitted here for brevity.

In summary, with the method of the present application and associated radio modules, at the outset, under the condition that any one of the plurality of radio modules only needs a TX power ratio that is less than a predetermined fixed ratio (i.e., one radio module will have an unused TX power headroom), other ones of the plurality of radio modules are able to utilize the TX power headroom to dynamically adjust the TX power ratio of the other ones of the plurality of radio modules and the TX power ratio of the any one of the plurality of radio modules (e.g., increase the TX power ratio of the other ones of the plurality of radio modules and correspondingly decrease the TX power ratio of the any one of the plurality of radio modules). Thereafter, the other of the plurality of radio modules can utilize the TX power headroom for further dynamic adjustment under the condition that the any of the plurality of radio modules still only needs a current TX power ratio that is less than the previously adjusted TX power ratio (i.e., the one radio module still has unused TX power headroom). In this way, ratio efficiency and performance may be improved.

Those skilled in the art will readily observe that numerous modifications and alterations of the apparatus and method may be made while maintaining the teachings of the present application. Accordingly, the above disclosure should be construed as limited only by the metes and bounds of the appended claims.

Claims (22)

1. A method for adjusting a transmit TX power ratio of a radio module, the method comprising:

mapping the radio frequency RF exposure limit to a TX power limit;

interacting with at least one other radio module to adjust the TX power ratio to obtain an adjusted TX power ratio; and

the TX power limit is adjusted according to the adjusted TX power ratio to generate an adjusted TX power limit for the radio module.

2. The method of claim 1, wherein interacting with the at least one other radio module to adjust the TX power ratio to obtain the adjusted TX power ratio comprises:

receiving at least one message of the at least one other radio module; and

the TX power ratio is adjusted at least in accordance with the at least one message of the at least one other radio module to obtain the adjusted TX power ratio.

3. The method of claim 2, wherein the at least one message of the at least one other radio module includes an on/off state of the at least one other radio module.

4. A method according to claim 3, wherein the step of adjusting the TX power ratio at least in accordance with the at least one message of the at least one other radio module to obtain the adjusted TX power ratio comprises:

in response to the on/off state indicating that the at least one other radio module is off, a portion of a TX power ratio of the at least one other radio module is allocated to the radio module if the at least one other radio module retains a required amount of power, or in response to the on/off state indicating that the at least one other radio module is off, all of the TX power ratio of the at least one other radio module is allocated to the radio module.

5. A method according to claim 3, wherein the step of adjusting the TX power ratio at least in accordance with the at least one message of the at least one other radio module to obtain the adjusted TX power ratio comprises:

the TX power ratio is dynamically adjusted in response to the on/off state indicating that the at least one other radio is on, in accordance with the at least one message of the at least one other radio and at least one message of the radio.

6. The method of claim 5, wherein each of the at least one message of the at least one other radio module and the at least one message of the radio module comprises: a previous TX power ratio, a TX power ratio margin, one or more TX performance indicators, one or more receive RX performance indicators, one or more weighting information, or one or more configurations.

7. The method of claim 6, wherein the at least one message of the at least one other radio module and each of the at least one message of the radio module comprises the one or more TX performance metrics, the one or more TX performance metrics comprising at least one of: the duty cycle of the TX, the error vector magnitude EVM of the TX, the target power, the throughput, the modulation and coding scheme MCS, the block error rate BLER, the resource block RB, the transport block size TBS, and the TX packet error rate TX PER.

8. The method of claim 6, wherein the at least one message of the at least one other radio module and each of the at least one message of the radio module comprises the one or more RX performance metrics comprising at least one of: the duty cycle of the RX, the modulation and coding scheme MCS, the block error rate BLER, the resource block RB, the received signal strength indication RSSI, the reference signal received power RSRP, the signal-to-noise ratio SNR, the signal-to-interference plus noise ratio SINR, and the RX packet error rate RX PER.

9. The method of claim 6, wherein the at least one message of the at least one other radio module and each of the at least one message of the radio module includes the one or more configurations, the one or more configurations relating to at least one of: an antenna, a frequency band, a beam, a technology, a sub-band, one or more exposure condition indicators, a simultaneous transmission status, a mobile country code MCC, a mobile network code MNC, a modulation, a bandwidth, a maximum power reduction MPR, a path, a duty cycle, and a combination of the frequency band and a subscriber identity module SIM.

10. The method of claim 1, the method further comprising:

the instantaneous power is controlled such that the average power is less than or equal to the adjusted TX power limit.

11. The method of claim 1, the method further comprising:

at least one message of the radio module is calculated for interaction with the at least one other radio module.

12. A radio module for adjusting a transmit TX power ratio of the radio module, wherein the radio module is arranged to:

mapping the radio frequency RF exposure limit to a TX power limit;

interacting with at least one other radio module to adjust the TX power ratio to obtain an adjusted TX power ratio; and

the TX power limit is adjusted according to the adjusted TX power ratio to generate an adjusted TX power limit for the radio module.

13. The radio module of claim 12, wherein the radio module receives at least one message of the at least one other radio module; and adjusting the TX power ratio based at least on the at least one message of the at least one other radio module to obtain the adjusted TX power ratio.

14. The radio module of claim 13, wherein the at least one message of the at least one other radio module includes an on/off state of the at least one other radio module.

15. The radio module of claim 14, wherein the radio module allocates a portion of a TX power ratio of the at least one other radio module to the radio module with a margin being reserved for the at least one other radio module in response to the on/off state indicating the at least one other radio module to be off, or allocates all of a TX power ratio of the at least one other radio module to the radio module in response to the on/off state indicating the at least one other radio module to be off.

16. The radio module of claim 14, wherein the radio module dynamically adjusts the TX power ratio in accordance with the at least one message of the at least one other radio module and at least one message of the radio module in response to the on/off state indicating that the at least one other radio module is on.

17. The radio module of claim 16, wherein each of the at least one message of the at least one other radio module and the at least one message of the radio module comprises: a previous TX power ratio, a TX power ratio margin, one or more TX performance indicators, one or more receive RX performance indicators, one or more weighting information, or one or more configurations.

18. The radio module of claim 17, wherein the at least one message of the at least one other radio module and each of the at least one message of the radio module comprise the one or more TX performance metrics, the one or more TX performance metrics comprising at least one of: the duty cycle of the TX, the error vector magnitude EVM of the TX, the target power, the throughput, the modulation and coding scheme MCS, the block error rate BLER, the resource block RB, the transport block size TBS, and the TX packet error rate TX PER.

19. The radio module of claim 17, wherein the at least one message of the at least one other radio module and each of the at least one message of the radio module comprise the one or more RX performance metrics comprising at least one of: the duty cycle of the RX, the modulation and coding scheme MCS, the block error rate BLER, the resource block RB, the received signal strength indication RSSI, the reference signal received power RSRP, the signal-to-noise ratio SNR, the signal-to-interference plus noise ratio SINR, and the RX packet error rate RX PER.

20. The radio module of claim 17, wherein the at least one message of the at least one other radio module and each of the at least one message of the radio module includes the one or more configurations, the one or more configurations relating to at least one of: an antenna, a frequency band, a beam, a technology, a sub-band, one or more exposure condition indicators, a simultaneous transmission status, a mobile country code MCC, a mobile network code MNC, a modulation, a bandwidth, a maximum power reduction MPR, a path, a duty cycle, and a combination of the frequency band and a subscriber identity module SIM.

21. The radio module of claim 12, wherein the radio module is further arranged to control instantaneous power such that average power is lower than or equal to the adjusted TX power limit.

22. The radio module of claim 12, wherein the radio module is further arranged to calculate at least one message of the radio module for interaction with the at least one other radio module.