TW200824312A - Radio receiver - Google Patents

Abstract

A radio receiver (4) adapted to alternatively receive data over a communication channel (3) in a first mode and a second mode. The second mode facilitates reception of data at higher data rates than the first mode. The radio receiver comprises a signal-processing unit (46) and a control unit (47). The signal processing unit is adapted to determine a quality condition of the communication channel (3). The control unit (47) is adapted to determine, based on the quality condition, whether the communication channel (3) facilitates operation in the second mode and assess at least one configuration condition, one of the at least one configuration condition being that the communication channel (3) is determined to facilitate operation in the second mode. The control unit (46) is further adapted to configure the radio receiver (4) to operate in the second mode when all of at least one configuration condition are fulfilled or to operate in the first mode otherwise. A method for controlling the radio receiver is also disclosed.

Description

200824312 IX. INSTRUCTIONS: [Technical field to which the invention pertains] The present invention relates to a sage, a scorpion, a scorpion, a radio receiver, and a method for operating a radio receiver. [Prior Art] In current mobile cellular standards and technologies such as GSM (Global System for Mobile Communications) and wcdma (Broadband.. Code Division Multi-Directional Proximity), heavy # = has gradually switched from circuit-switched voice The center uses the packet-switched data stream: move. At the same time, efforts to achieve higher data rates have resulted in, among other things, the creation of such standards and technologies, such as the use of enhanced data rates for global development and WCDMA2HSDpA (high-speed downlink). Packet pick up). The complexity of the radio transceiver circuitry increases as the data rate increases. For example, the requirements for signal purity in the transmit and receive circuits are increased to meet the high data rates required. It makes the reception of high data rate more difficult than the reception of low data rate. • The mechanism is that the effective energy of each transmitted information bit decreases as the data rate increases. This is responsible for the increase in the purity of the signal in the transmitting and receiving circuits. One conventional solution for improving signal purity when each bit energy is reduced is to design, for example, a noise index, frequency, time-order drift, phase noise, image rejection, and DC bias introduced to the received signal. A radio transceiver with significantly more stringent requirements. Therefore, the complexity of radio transceivers tends to increase as data rates increase. One of the problems with this type of conventional solution is that the resulting circuitry will occupy a larger wafer area, resulting in higher costs. In addition, the power consumption of such circuits is relatively high, resulting in a reduction in battery operating time. Despite the fact that the highest achievable data rate is generally relatively infrequent, these negative effects—straight. The reason for this is that a typical user will occasionally use a high data rate. In addition, the original, because the highest data rate requires excellent radio conditions, this, excellent conditions can generally be found in the sight of a base station. SUMMARY OF THE INVENTION It is an object to provide a radio receiver with reduced complexity. • According to the first aspect, a method for operating a radio receiver is provided. The radio receiver is adapted to receive data alternately through a communication channel in a first mode and a second mode. The second mode assists the Weihe River in receiving data at the data rate of the first mode. The method includes determining a quality condition of the communication channel. The method further includes determining whether the communication channel assists operation in the second mode based on the quality condition. In addition, the method includes evaluating at least the configuration conditions. The conditional condition is that the communication channel is determined to assist in operation in the brew mode. Additionally, the method includes configuring the radio receiver to be in the second mode when the at least one configuration condition is fully met: " mulberry or otherwise configuring the radio receiver for use in the In the mode of operation. Configuring the radio receiver can include configuring the no-auto gain control loop. ° The radio receiver is configured to operate in the second mode towel to include an automatic gain control unit of one of the automatic pitch control loops. The radio receiver is configured to operate in the first mode to include a 122705.doc 200824312 gain control, one of the DC blocking units. Using the wireless "mode" to operate in the second mode may include deactivating the stream blocking unit. Configuring the radio receiving n to operate in the first mode may include the DC blocking unit The cutoff frequency is set to a first value: the configuration of the radio receiver for operating in the second mode may include setting the cutoff frequency of the chopper to a second value. Higher than the second value. The quality condition may be (4) the money-to-interference ratio of the passway. Deciding whether the communication channel assists operation in the second mode may include determining that the signal-to-interference ratio exceeds m. The communication channel assists the operator (4) in the second mode to determine that the communication channel is not assisted in the second mode. The second method can further include determining whether the control material is received according to the control channel received through the communication channel. It is contemplated that the data to be received is to be received at any data rate through the communication channel to assist in receiving data in the second mode rather than in the mode. One of the at least one configuration condition may be It is intended that the material to be received will be sent at any data rate through the communication channel to assist in the non-receipt of the data in the first-sixth-sixth. And determining whether it is expected to be sent at the data rate through the communication channel, and the data received by the slave to assist in receiving the data in the second mode instead of the first handle may include deriving from the control data. The number of data packet channelization codes for the greedy material to be received. It can be determined according to the data packet channel 122705.doc 200824312 whether it is expected to transmit the data to be received through the communication channel at any rate = According to this, in the second mode, the data is received in the first mode. It is expected that the data received by the data rate of the above data is used to assist the data in the second mode instead of the first mode. The data received by 4 may include whether or not to be used according to the control data. (4) - Modulation format. It may be determined according to the modulation format that = will be transmitted through the communication channel at any data rate to be received = In the second mode, rather than receiving the negative data in the first mode, determining whether (4) the data rate of the communication channel is sent to transmit the data to be received, thereby assisting in the second mode instead of the The first mode: receiving data may include deriving a code rate to be used for receiving according to the control data, and determining, according to the code rate, whether it is expected to transmit the data rate through the shai communication channel. Receiving data to assist in receiving data in the second mode instead of in the first mode. The communication channel can be, for example, a high speed downlink packet access communication channel or an orthogonal frequency division. According to a second aspect, a computer program product includes a computer code component for performing the method when the computer code component is run by an electronic device having one of computer capabilities. According to a third aspect, a computer Readable media program product 'This touch program product contains computer code = when running the computer code component by computer capable electronic device 122705.doc -10- 2 00824312 Perform this method. According to a fourth aspect, the second mode auxiliary of the radio side of the receiving material is received in the first mode mode by the first mode, and is higher than the first time. The feed rate of the receiver receives the radio receiver sentence + - the quality of the strip determines the (four) channel of the product, the condition of the signal processing unity of the radio receiver into the step _ step contains a tone suitable for determining the quality condition # ° — The control unit of the 刼 刼 。 。 。 。 。 st st st st st st st st st st st st st st st st st st st st st st st st st st st st st st st st st st st st Operating in the second mode. Further, (4): ... is adapted to configure the receiver to operate in the second mode or otherwise to set the electrical receiver group when the at least one configuration condition is fully met The state is operable in the first mode. The radio receiver can include an automatic gain control loop. The control unit can be adapted to configure the automatic gain control loop. The automatic gain control loop can include a Variable gain The amplifier and a configuration are used to control one of the variable gain amplifiers. The control unit can be adapted to set the automatic gain; = in the second mode. The automatic gain control loop can include a constant current. a blocking unit. The control unit can be adapted to enable the DC blocking unit in the first mode and disable the DC blocking unit in the second mode. The DC blocking unit can include a filter. Can be used 122705.doc -11 · 200824312 to apply to the first value of one of the filters in the 隹镔 隹镔 杈 兮. 兮 ^ cutoff frequency is set to ~ control unit can be adapted to apply the cutoff frequency In the mode of the younger brother, κ 疋 疋 is a second value. The first value. The value of the younger brother can be higher than the second::::= one of the communication channels has a signal-to-interference ratio. The value system can be adjusted to apply to the interference ratio in the signal to determine that the communication channel is assisted in the second mode.

The unit can (4) enter—(4) apply to the control signal from the received signal. The control unit - J ° ^ Μ step is adapted to transfer data to be received at any data rate through the communication channel according to the work, ~, or not, thereby assisting in the second mode instead of Receive data in the mode of the younger brother. One of the at least one of the configuration conditions may be that the data to be received is expected to be transmitted through any of the four (4) materials of the message channel to thereby assist in receiving data in the second mode rather than in the first mode. The control unit can be adapted to derive the number of data packet channelization codes for the data to be received based on the control data. The control unit may be further adapted to determine, according to the number of data packet channelization codes, whether it is expected to transmit the data to be received at the data rate through the communication channel, thereby assisting in the second mode. Rather than receiving data in this first mode. The control unit can be adapted to derive a modulation format for the data to be received based on the control data. The control unit can be further adapted to determine, according to the modulation mode, whether it is expected to transmit the two modes to be received through the communication channel at any data rate of 122705.doc -12-200824312, instead of the first In the mode, the assistance is received, and the auxiliary control unit can adjust the code-rate corresponding to the received data. The control list can be determined based on the code rate to determine whether data to be received is expected to be transmitted through the communication channel:::: rate to assist in receiving data in the first mode rather than in the first mode. ^ : Letter: The track can be, for example, a high speed downlink channel or an orthogonal frequency division multiplexing channel. According to a fifth aspect, a set of communication units can be, for example, a ": two-wire electric receiver, the -8-type or handheld mobile radio communication half-,-mobile radio terminal, A mobile phone, a ", a communicator, an electronic notebook, or a smart phone. Other embodiments of the invention are defined in the term "include" in the independent scope of the patent application, including/including, The use of the features, integers, steps or components recited in the specification is intended to be used in the specification, but does not exclude the presence or addition of one or more other features, integers, steps, components or groups thereof. [Embodiment] Fig. 1 illustrates the % of the month to the month in which the present invention can be applied. A mobile communication unit i (e.g., a mobile telephone) communicates with a radio base station 2 via a sf, s4 communication channel 3. The communication channel 3 can be at r, 7 for, for example, a wide frequency coded multi-directional proximity (WCDMA) communication channel. Note A full WCDMA solution will be used in the month of the month. 122705.doc -13 - 200824312 is used as an example. However, the present invention is not limited to WCDMA, but the present invention is applicable to other types of communication environments and can also be applied to other schemes than those illustrated in Fig. 1. For example, the invention is applicable to an orthogonal frequency division multiplexing (OFDM) system, such as the proposed 3GPP long term development system. In addition to the WCDMA technology, there is also High Speed Downlink Packet Access (HSDPA). HSDPA specifies a number of different data rates. HSDPA includes a set of different physical downlink channels, including: a High Speed Physical Downlink Shared Channel (HS-PDSCH) containing actual data traffic; and a High Speed Shared Control Channel (HS-SCCH) containing How to receive and demodulate the control data of the data transmitted in the HS-PDSCH. The communication channel 3 mentioned in this specification may contain a plurality of physical channels. It may, for example, comprise: a physical channel for controlling data, such as one of HS-SCCH in HSDPA; and a physical channel for data traffic, such as one of HSDPA HS-PDSCH; and various uplinks and Downlink physical channel. Therefore, in this specification, data received or transmitted through any such physical channel is referred to as data received or transmitted through the communication channel 3. The highest data rate available in HSDPA can only be used under the specific conditions of this communication channel 3. An example of this particular condition is that the communication channel 3 is approximately one of the relatively low levels of noise and interference plus an additional white Gaussian noise (AWGN) channel. For example, a signal-to-interference ratio (SIR) of more than 15 dB is required to assist the data rate of 10 megabits/s and higher in HSDPA. Under the specific channel conditions that allow the use of these southernmost data rates, the data rate that can be reached is generally limited by the signal introduced in the receiver circuit. 122705.doc -14- 200824312

system. Under poor channel conditions that only allow for lower data rates, it can be achieved that the lean rate is generally limited by signal impairments introduced in the communication channel 3 (e.g., multipath fading and external interferers). These facts are utilized in the specific embodiments described below. Under the specific channel strip 2, which allows the use of the highest data rate, the radio receiver 4 can be reconfigured, enabled and/or deactivated to receive the part of the radio receiver 4 (Fig. 2). The parts of the radio receiver 1 can be used to compensate for the damaged parts introduced in the I (3) under poor channel conditions. By configuring the radio receiver 4, the radio receiver is reduced. The signal introduced in the circuit is damaged. Therefore, by configuring the radio receiver 4, the radio receiver 4 will be more suitable for data reception at the highest data rate. A configuration example that can be executed will be described in the context of a specific embodiment. Figure 2 is a block diagram of one embodiment of a radio receiver 4, including an automatic gain control (AGC) loop I. The radio receiver 4 is adapted to the parental ground in the -th_mode and - The second mode receives the material through the communication channel 3. The second mode assists in receiving data at a data rate higher than the first mode. The radio receiver 4 can be included, for example, in the mobile communication unit 1 (Fig. 1) In the specific embodiment shown in FIG. 2, the τ far AGC loop 30 is adapted to be within the radio receiver 4 to hold a signal of one of the received signals within the radio receiver 4~~< Level 0 The signal level can be scarred, for example, an average power level. According to the HSDPA specific example, the 兮 仏 ^ ^ thousand average power level can be one or more HSDPA time slot range average six | A ten-fold power level, such as, but not limited to, one, two, or three time slots. 122705.doc -15- 200824312 In the specific embodiments described herein, the first mode can be under relatively poor conditions of the communication channel The mode of use. In this first mode, the part of the radio receiving H 4 is configured to compensate for signal impairments introduced in the channel.

Another-party: 'This: mode is the mode that can be used under relatively better channel conditions. In the second mode, the parts of the radio receiver 4 are configured to reduce the nuisance caused by the parts themselves, as compared to the operations in the first mode. And (4) the first mode is reduced, and the (four) second mode is made under the relatively poor channel condition, which may deteriorate the robustness of the receiver. Thus, in accordance with certain embodiments, the second mode will only be used when the communication channel 3 assists in operating in the second mode. According to the HSDPA embodiment, the data rate assisted in the second mode, rather than in the first mode, is 1 megabit and higher data rate. According to another embodiment of the HSDPA, the data rate assisted in the second mode, rather than in the first mode, includes only the highest data rate (14 megabits/s) in HSDpA. In other embodiments, other data rates are assisted in the first mode rather than in a mode. These data rates may vary between different application and receiver implementations. It may be necessary to experiment with, for example, simulations and measurements to determine which data rates are assisted in the first mode rather than in the first mode, and to determine which channel conditions are assisted in operating in the second mode. In the particular embodiment illustrated in Figure 2, the radio receiver* includes a front end (FE) unit 40. The AGC loop 3 includes a variable gain amplifier (VGA) 41 operatively coupled to one of the outputs of the fe unit 4 and is operatively coupled to I22705.doc -16-200824312. Take care of 42. In addition, the AGC loop 30 includes an analog-to-digital converter (ADC) operatively coupled to one of the outputs of the straight-early switch 42. The configuration is used to filter the ADC 43 A digital low pass (Lp) filter 44 of one of the digital output signals. An output of the LP filter 44 is coupled to an AGC unit 45 included in the agc back (four). The output of the new filter 44 is further coupled to a signal processing (sp) unit included in the radio receiver 4.

The line receiver 4 further includes a control unit (CU) 47 configured to receive information from the SP unit 46. The cu 47 is further adapted to receive information from the SP unit 46 by the CU 47. The receiving group is used to operate in the first or the second mode. Each of the AGC unit 45, the SP unit 46, and the CU 47 may be implemented, for example, in hardware, software, or a combination thereof. For example, each single 7G of the units can be implemented by a programmable hardware unit (e.g., a processor), a particular application hardware circuit, or a combination thereof. As shown in FIG. 2, the DC blocking unit 42 can include a filter 42a, such as a high pass (HP) or band pass (BP) filter. The functionality of the different blocks of the radio reception 4 in accordance with the embodiment shown in Figure 2 will now be described in greater detail. The FE unit is adapted to convert a radio frequency (RF) signal downward, e.g., from a unit external to the radio receiver (e.g., base station 2 (Fig. 1)). In addition, the 1-5 unit 40 is adapted to output a signal having a lower frequency than the RF signal, such as a baseband signal or an intermediate frequency (IF) signal. The RF signal contains control data (eg, control data transmitted through an HS-SCCH in HSDPA) 122705.doc -17« 200824312 and/or actual data traffic (eg, feedthrough developed in HSDPA -hs) . The ton unit 40 can be implemented, for example, by using a mixer and filter configured to perform the down conversion in a known manner.八 Eight has a variable gain which is controlled by the AGC unit 45 to obtain a relatively stable signal level for the output signal from the VGA 41. The signal level can be, for example, an average power level.

• The DC blocking unit 42 is adapted to remove or reduce the DC offset in the output signal from the VGA 41. The DC blocking unit 42 is further adapted to suppress or attenuate unwanted slow-changing signals in the output of the VGA 41. Such a slowly varying signal can be generated, for example, by adjusting the phoenix of the VGA 41. As described above, the DC blocking unit π can include the filter 42a (eg, it can be a high pass (Hp) chopper or a band pass (BP) filter H' to remove or reduce the DC offset and/or Or attenuating an unwanted slowly varying signal present in the output signal from the VGA 41. The legacy ADC 43 is adapted to convert the output signal from the DC blocking unit 42 into a digital output signal, thereby enabling Digital signal processing techniques for further signal processing. The Bu-4 filter 44 is adapted to reject or remove noise and distortion outside of the signal band of one of the digital output signals from the ADc 43.

. The Hai AGC unit 45 is adapted to determine, for example, a signal level (e.g., an average power level) of an output signal from the 戎LP filter 44 by calculation, estimation or measurement. The AGC unit 45 is further adapted to control the gain of the VGA 41 in accordance with the signal level, thereby suppressing variations in the signal level of the turn-out signal from the VGA 122705.doc -18- 200824312 41. ^ SP Single 46 is suitable for determining the quality condition of one of the communication channels 3. This quality condition is based on a received signal. The SP ^SP unit 46 is further adapted to extract or derive control data based on the output of the LP filter 44, such as a control poor material in an HS-SCCH in HSDPA. In some embodiments, the sp unit is adapted to perform additional signal processing tasks, such as channel equalization. The SP unit 46 is configured to forward the output from the filter 44 (which may be after channel equalization) for further processing. Further processing may, for example, include demodulation and recovery of the received data. The SP unit 46 is adapted to convey information relating to the quality conditions of the communication channel 3 to the cu 47. The cu 47 system is adapted to determine whether the communication channel 3 assists operation in the second mode based on the quality condition. According to a specific embodiment, the quality condition is one of the communication channels 3 SIR. The SIR can be, for example, a sir of a received preamble. In some embodiments, the cu 47 tune is adapted to compare the sir to a defined value. The CU 47 is further adapted to determine that the communication channel 3 assists operation in the second mode when the SIR exceeds the limit value. In various embodiments, the limit values can be different. In some embodiments, in the second mode, rather than in the first mode, the data rate is 10 megabits/s and higher, the appropriate data rate. Is a limit of at least 15 dB. According to another embodiment, the quality condition is a power delay profile (PDP) of the communication channel 3. Having one of the single primary peaks pDp indication 122705.doc -19- 200824312 is, for example, a clear viewing distance between the mobile communication unit and the base station 2 (Fig. 1). However, having one of several peaks of comparable size indicates multipath fading due to, for example, obstructing signal reflections on the object. : When the power peak ratio between the maximum peak of Zhejiang and one or more other peaks of the PDP (for example: • maximum peak or all other peaks) exceeds a limit value, the communication channel 3 (for example) may be determined as auxiliary In the second mode ^ operation. According to another embodiment, the quality condition is a combination of a SIR disk and a PDP. In this embodiment, when the power ratio between the peaks in the pair exceeds the -second limit value, the communication channel 3 is determined to be auxiliary in the second mode. operating. The (3) 47 series adjustment is suitable for evaluating at least _ configuration conditions. The (3) is further adapted to configure the radio receiver 4 to be used in the first-part mode when the 4th, the unknown & / * is at least, and the evil conditions are all satisfied. Otherwise, the radio receiver 4 is configured to be used in the case of age, and the at least one set of the slaves is in the form of a ^^, and the condition of the evil is the communication channel. 3 The decision is to assist in the second mode of operation. According to some embodiments, the cu 'channel 3 is determined to assist in applying the radio receiving group 4 to the 篦-通 when the second modulo is adapted to operate in the communication F3...different in the core mode, and otherwise (ie, 'when the communication channel 3 is determined not to assist in the second module ^ 4 r ® ), the radio receiving state 4 groups of evils are used In the first mode, t ^ is known. In this particular embodiment - 掇 + + channel 3 is determined to assist in the first mode in the system. 122705.doc -20 - 200824312 According to other embodiments, the cu 47 system is adapted to use the radio channel 3 when it is determined to assist in operating in the second mode and satisfy one or more additional configuration conditions The receiver 4 is configured to operate in the second mode and otherwise configure the radio receiver 4 to operate in the first mode. In a specific embodiment, the additional configuration condition is expected to transmit the data to be received at a data rate through the communication channel 3, thereby assisting in the "first" mode instead of the first mode. Receiving data. This data rate, which is used to assist in receiving data in the first mode, rather than in the first mode, will be referred to as a high data rate in this specification. Again, it is assisted in the first The data rate of one of the received data in the mode will be referred to as a low data rate. In this particular embodiment, the SP unit 46 is additionally adapted to communicate the control data to the CU 47. The CU47 is additionally adapted to According to the "Hai control data, it is determined whether it is expected that the data to be received will be transmitted through the communication channel 3 at a high data rate. According to a specific embodiment, the control unit 47 is adapted to at least configure the AGC loop 30. The radio receiver 4 is configured to operate in the second mode (as described below). When the AGC unit 45 modifies the gain of the VGA 41, a dynamically changing DC is introduced in the output of the VGA 41. The level shifting. These dynamically changing DC level offsets can occur as an approximately segmented constant signal that changes its level at the moment the AGC unit 45 updates the gain of the VGA 41. These DC level shifts are suppressed by the DC blocking unit 42. However, signal impurities generated by such DC level shifts (eg, 122705.doc -21 - 200824312 such as spikes or short-term pulse waves) are retained. The output of the DC blocking unit ^ such (4) impurities may cause a bit error such that the radio reception has a bit error rate (Ber) degradation.

When the communication channel 3 is assisted to operate in the second mode, the signal level of the vga Μ and the input two f is relatively stable. In the vga input letter. In the case where the u-level is relatively stable (for example, but not limited to, when the average signal power is less than 1.5), it is not necessary to adjust the benefit of the VGA 41. Therefore, the AGC unit 45 can be locked. For example, the output signal from the AGC unit 45 to control the gain of the VGA 4i can be set to a constant value. # Eliminate the DC level offset mentioned above by locking the unit. Therefore, the signal impairment introduced in the radio receiver 4 (in this case in the VGA 41) is reduced, and the advantage of the line electric receiver can be improved. Thus, in a particular embodiment, the CU 47 system is adapted to assist the high data rate data by operating the radio receiver 4 with the AGC unit 45 and for operating in the second mode. receive. . . In other embodiments, the AGC unit U is not locked, and the woven unit 45 is configured in the second mode to be reduced in comparison to the VGA 41 in the first mode. The increase of $ is adjusted. Therefore, the output of the VGA 41 is reduced in the second mode as compared to the second mode: the signal introduced by the DC level offset is damaged. For example, in a specific example, the update period of the single 5 is increased in the second mode as compared with the first mode (ie, between the time when the AGC unit 45 updates the pong a of the VGA 41). The amount of time), thus assisting the high data rate of 122705.doc -22- 200824312 material reception. According to another embodiment, the AGC unit 45 can be configured to update the gain of the VGA 41 in the second mode only if the signal level has changed by more than a defined value. For example, you can predefine this limit value.

The DC blocking unit 42 may be a source of so-called inter-wafer interference (ICI). In, for example, hsdpa, the ICI k - introduced by the DC blocking unit 42 can cause bit errors and can degrade the BER of the radio receiver. This question is exacerbated by the increased data rate. When the AGc unit 45 is locked or configured to reduce the gain adjustment of the vga 41 compared to the first mode, as described above, the suppression of the DC level offset and the unwanted slowness are relaxed. The requirements of the DC blocking unit 42 in terms of varying signals. In addition, when the communication channel 3 is assisted to operate in the second mode, the output of the VGA 41 is offset by the DC level as compared to when the communication channel 3 is not assisted in operation in the second mode. Signal impairment introduced, ie

• This is also the case if the AGC unit 45 is not locked or configured to reduce the adjustment of the gain of the VGA 41. This is because the signal level of the input signal to the VGA 4i% is relatively stable, and therefore the gain is less adjusted to stabilize the signal level of the output signal from the VGA 41. Therefore, when the AGC unit 45 is not locked or configured to reduce the adjustment of the gain of the VGA 41, it is also possible to relax the suppression of the DC level offset and the unwanted slow change signal. The requirements of the unit 42. When relaxed in the DC level offset suppression and unwanted slow change signal 122705.doc -23· 200824312 side (four) the DC blocking unit 42 requirements, said on the mouth, can (by the law) by let. The output of the VGA 41 is directly passed to the input of the ADC 43 to ^; early 42. Alternatively, the Hp_p chopper can be reduced in the DC blocking unit 42 as compared to the lower cutoff frequency used when the radio receiver 4 is configured to operate in the first mode. Lower cutoff frequency. The ICI introduced by the DC blocking unit 42 is respectively omitted or reduced by deactivating the DC blocking unit 42 or reducing the lower cutoff frequency. Therefore, the signal purity will be improved. Therefore, the BER of the helmet line electrical receiver will also be reduced. In a specific embodiment, the cu 47 is adapted to configure the radio receiver 4 to operate in the second mode by deactivating the DC blocking unit 42 to assist in high material rate. Data reception. Additionally, the AGC unit 45 can be locked or configured to reduce the adjustment of the gain of the VGA 4i as compared to the first mode. Additionally, the cu 47 system is adapted to enable the radio receiver to be configured to operate in the first mode by enabling the DC blocking unit 42. In another embodiment, the cu 47 is adapted to configure the radio receiver 4 for use in the first mode by setting the cutoff frequency of the filter 42a to a first value. Operationally, the (3) stabilization is adapted to configure the radio receiver 4 to operate in the second mode by setting the cutoff frequency of the filter 42a to a second value. The binary value is lower than the first value, thereby assisting in high rate signal reception. Moreover, for operation in the second mode, the AGc unit 45 can be locked or configured to reduce the gain adjustment of the vga 122705.doc -24 - 200824312 4 1 compared to the (four)-mode. If the communication channel 3 does not assist in operation in the second mode, the receiver is configured to be used in the second mode by performing the above configuration on the AGC unit 45 and/or the DC blocking unit 42. Operation can severely degrade the robustness of the radio receiver and can degrade the ber " of the radio receiver. The specific embodiment shown in Figure 2 should only be considered as an example. Some of the units shown in Figure 2 may be omitted in some embodiments, and additional units may be included. Additionally, in some embodiments, the units of the radio receiver 4 can be configured and connected in other ways than those shown in Figure 2, for example, according to one embodiment, the AGC loop 30 is completely analogous. Therefore, the ADC 43 and the digital filter 44 are omitted in the AGC loop 30, and the output from the DC blocking unit 42 is fed directly to the AGC unit 45, which is an analogy in this embodiment. The input signal is operated. The AGC loop 3 can additionally include, for example, a bit-directed offset circuit (shown) to ensure proper operating points within the AGC loop 3. In addition, the output of the DC blocking unit 42 is fed V to the input of the SP unit 46 in this embodiment. The SP unit 46 can include an ADC (not shown) for converting the output from the DC blocking unit 42 to one of the digital signals to enable the use of digital signal processing techniques in the sp unit 46. Figure 3a shows a block diagram gamma of one embodiment of the DC blocking unit 42 suitable for use when the radio receiver 4 is configured to operate in the first and second modes, respectively. Cu 47 is used to enable and stop 122705.doc *25 - 200824312. For operation in the first mode, the input signal of the DC blocking unit 42 is directed to the filter 42a via a switch 6 (which is controlled from the CU 47). For operation in the second mode, the cu sets the switch 60 to bypass the filter 42a, thereby directly transferring the input signal of the DC blocking unit to an output signal of the DC blocking unit 42. The DC blocking unit 42 is thus deactivated.

Another embodiment of the DC blocking unit 42 is shown in Figure 3b. In this particular embodiment, the filter 42a has a controllable lower cutoff frequency from which the CU 47 can be controlled. The chopper 42& includes a first-sub-filter 61 and a second sub-wave 62. The lower cutoff frequency of the first sub-filter 61 has the _th value. The lower cutoff frequency of the second sub-filter, waver 62 has the second value. The input signal of the DC blocking unit 42 is fed to the first sub-waveboker 61 and the second sub-filter 62 as an -input signal. The switch 63 from the CU 47 controls the output signal from the first sub-filter 6! or the second sub-filter 62 and forwards the selected output signal to the output signal of the DC blocking unit 42. For the hand in the first mode, the switch 63 is set to select the output signal from the first sub-chopper 61. For operation in the second mode, the switch 63 is configured to select an output signal from the sub-filter 62 of the sub-machine. > According to other specific implementations, the field JU / m j knows to use more than two sub-filters to obtain greater degrees of freedom in determining the cutoff frequency of the filter 42a. The waveguide 42a is implemented by using active components (e.g., operational amplifiers and/or cross-overs) in combination with passive components (e.g., resistor stones or capacitors) in accordance with certain embodiments. For example, the waver 42a can be a 122705.doc -26- 200824312 as an active RC filter or a Gm-C filter. We are familiar with how to tune or adjust the frequency response of such a filter implementation by changing the capacitance of the capacitor in the filter. Figure 3c shows a specific embodiment of the DC blocking unit 42, wherein the filter 42a includes a block of filter components 64 (e.g., active and passive components) and a capacitor bank 65 σ. The capacitor bank 65 includes a plurality of The switching capacitors can be individually connected to or disconnected from the internal nodes of the filter 42a.

Again, the valley value and thus the cutoff frequency of the filter 42a. This can be performed, for example, in accordance with well known filter tuning techniques. Specifically in Figure 3c. In the embodiment, the capacitor bank 65 is controlled from the CU 47 and thus the cutoff frequency of the ferrocouple 42a is controlled. Figure 4 is a flow (4) of one embodiment of a method for operating the radio receiver 4. Determining the quality bar of the communication channel 3 in (4) 11G = in step 12, determining whether the communication channel 3 is assisted in the second mode: in step 130, the radio receiver 4 is configured for use in the brother Operates in one or second mode. According to a specific embodiment, the quality condition is the SIR of the communication channel 3: the SIR of a preamble signal. In step 110, the quality bar is determined! 2: Medium: For example, the hunting determines the SIR by measurement or estimation. In addition, if the step (4) SItr communication channel 3 assists in operating the packet value in the second mode, then ~ - The limit value is compared. For example, if the sm exceeds the limit, the communication channel 3 is determined in step 12° to assist the second mode in the step 130 when at least one configuration condition is satisfied. 27- 200824312 The radio receiver 4 is configured to operate in the second mode or otherwise operate in the first mode. According to a specific embodiment, a configuration condition is determined by the communication channel 3 to assist in the operation of the second mode in accordance with certain embodiments of the method, and in the step 〇3, the radio receiver is only based on the quality condition. 4 configured to operate in this second mode. For example, the radio receiver can be configured to operate in the second mode when the communication channel 3 is determined to be auxiliary in the second mode according to the quality condition, otherwise it can be configured to be used in Known in this first mode. This is illustrated by the flow chart of Figure 5, which shows a specific embodiment of step 130 (Figure 4). In step ΐ3ι&, it is checked whether the communication channel 3 is determined to be assisted in the second mode in step 12G (Fig. 4). If the answer in step 131a is yes, then the radio receiver is configured to operate in the second mode in step 132 & If back = no in step ma then the radio receiver configuration is used in step 133a to operate in the first mode. For the specific embodiment shown in Figure 5, the above ^ condition (i.e., the decision to channel 5 to operate in the second mode) is the only configuration condition. According to other embodiments, the radio receiver configuration is configured in gamma step 130 (FIG. 4) when the communication channel 3 is determined to assist in operating in the second mode and also meets at least one additional configuration condition. Used to know in this second mode. An example of this embodiment is illustrated by a flow chart of Fig. 6, which shows another embodiment of step 13 (Fig. 4). In step 131b, it is checked whether the communication channel 3 is determined to operate in the second mode in the step Η% graph 122705.doc -28- 200824312. If the answer in step 1311? is no, the radio receiver 4 is configured to operate in the first mode in step 133b. If the answer in step 131b is YES, then in step (9), control data indicating the data rate of the data to be received is retrieved. The control data retrieved in step m t can be the control data received through the communication channel 3. In the specific embodiment of the PA deletion, the control data is received through a coffee maker. In step 135, the control data captured in step 4 is determined.

Whether to indicate that data to be received is expected to be transmitted through the communication channel 3 at a high data rate. That is, in the case of the body, the body, and the configuration, it is expected that the data to be received is transmitted through the communication channel 3 at a high data rate. If the answer in step _5 is yes, then in step (10) the radio interface: the underwire is configured to operate in the second mode. If the return t in step 135 is no, the radio receiver is configured to operate in the first mode in step 1331). One advantage of the embodiment shown in Figure 6 is that an unnecessary configuration of the second module can be avoided as compared to the embodiment shown in Figure 5. Example #, when only the low feed rate is used, the second mode is not required, and if the channel conditions change around the boundary between the auxiliary and the unassisted operation in the second mode 2 in the first mode Operating the radio receiver 4 and avoiding frequent switching between the first and first modes may be advantageous for the robustness of the receiver. In accordance with certain embodiments, the control upon which the decision in step 135 is based includes information specifying the data rate at which & Alternatively, step 134 can include extracting the explicit information from the control data. 122705.doc •29- 200824312 In HSDPA, information specifying the data rate used for data transmitted through the HS-PDSCH is included in the control data transmitted through the HS_SCCH. However, the common timing of the HS-PDSCH and the HS-SCCH causes the reception of the data in the HS-PDSCH· (which is related to the explicit information of the data rate) before the radio receiver 4 receives the explicit information. Therefore, in HSDPA, the explicit information of the data rate transmitted through the HS-SCCH cannot be used as a basis for the decision in step 135 because the configuration of the radio receiver needs to be performed before receiving the data through the HS-PDSCH. . However, other information is sent through the HS-SCCH before sending the data. Such other information indicates whether it is possible to send the data to be received at a high data rate. Therefore, other information can be used as one of the decisions in step 135. The number of extensions of this other information is the number of extension codes, data packet channelization code and modulation mode. It can be used in HSDPA! Up to 15 data packet channelization codes. The larger number of channelized packetization codes indicates a larger data rate. In addition, the modulation format used in the squad is quaternary phase shift keying (QPSK) or 16-point quadrature amplitude modulation (16_qam). According to the specific embodiment, step 135 includes extracting the number of data ft i channelization codes from the control data. If the number of data packet channelization codes exceeds or equals a limit value, it is expected to pass through The communication channel 3 describes the data to be received at a high 枓= rate. According to a specific embodiment of hsdpa, the limit value is 1 5 (that is, the number of codes that are large). According to another HSDPA embodiment. The limit value is the minimum number of data packets required for the data rate of the Μ 〆 版 ^ ^ ^ ^, 其 现 一 1 1 1 位 。 。 。 。 。 · · · · · · · · · · · · · · · · · · · 最小Each data in the HSDP is 122705.doc -30- 200824312 The theoretical maximum value of the data rate of the packet channelization code is 〇·93 megabits. Of course: the appropriate limits can vary between different application and receiver implementations. Therefore, the given paradigm should not be considered as limiting. According to another embodiment, step 134 includes extracting (4) a variable format from the control data. If a -specific modulation format is used, it is expected that the data to be received will be transmitted through the 1 channel 3 at a high data rate. The specific tuning-variation format is specific and may not be the same in different applications. According to a HSDPA embodiment, the specific modulation format is 16_qam. The decision in step 135 may be based on the combination of the number of data packet channelization codes and the modulation format. According to some HSDPA embodiments, in step 135, if at least one data packet channelization code of the modulated 袼si heart QAM is used, the data to be received is determined to be expected to be transmitted at a high data rate. Nth is a critical level. According to a specific embodiment, NtJ, 15. The highest data rate is used in HSDPA (14 megapixels (8) is used to adopt the modulation 16-QAMi 15 data packet channel art code. According to other HSDPA specific embodiments, Nth is U, 12, 13 or 14. Of course. The appropriate values for Nth can be implemented in different applications and receivers: between scenarios. Therefore, a given example should not be considered as limiting. According to a specific embodiment, the control data is included for reception. One of the data rates. Next, step 134 can include fetching the code rate from the control data. According to some embodiments, step 132a (FIG. 5) and step 132b (FIG. 6) include locking the radio receiver 4. AGC unit 45 (Fig. 2). Alternatively, step 132a (Fig. 5) and step 132b (Fig. 6) may include the agc unit 45 = 122705.doc - 31 - 200824312 state for operation in the first mode. The adjustment of the gain of the VGA 41 is reduced (Fig. 2). For example, the update period of the AGC unit 45 may be increased compared to the operation in the first mode, or may be changed only at the signal level. Exceeded - limit value (eg 'can be tied - predefined value) The AGC unit 45 is configured to update the gain of the VGA 41. Additionally, steps U2a (Fig. 5) and step mb (Fig. 6) may alternatively or additionally include deactivating the DC blocking unit 42 (Fig. 2) or The cutoff frequency of the filter is set to the second value. Similarly, the step (Fig. 5) 13 3 b (Fig. 6) may include enabling the DC blocking unit 42 or cutting off the wave 42a. The frequency is set to the first value. The method described above by means of different embodiments may, for example, be performed for each data message to be received in a packet-based data communication environment. The method can be used to process (eg, HSDPA) the highest data rate by other rules or irregular intervals (eg, every two seconds, three seconds, or every four data packets, etc.). In the traditional method of centralization, the radio design is adopted in one of the circuit requirements of (for example, noise index, frequency and timing), = system and introduction of DC offset to the received signal = phase (4). Probably not:::2::For: lower data rate in DPA (its-like The π Bay rate is more commonly used. In the case of (for example) designing for operation under the part and assisting in the connection of all (4) ships, the circuit in the circuit will be operated at a lower data rate operation (4). The car has a large wafer area and consumes - not necessarily a larger amount of power. 122705.doc -32^ 200824312 In a particular embodiment described herein, the radio receiver 4 is configured to operate in the second mode For example, under good channel conditions (i.e., assisting channel conditions operating in the second mode). For example, by disabling and/or adapting the components of the radio receiver 4 used under poor channel conditions (e.g., not assisting channel conditions operating in the second mode) to compensate for signal impairments introduced in the channel, The radio receiver 4 is thus configured to operate in the second mode. This configuration makes the radio receiver

4 capable of processing such data rates under the conditions of a channel that allows the use of the highest data rate in HSDPA (eg, data rates of 1 megabits/s and higher) without the use of a radio design with relatively stringent requirements ( As mentioned above, this design is otherwise required). Thereby, the complexity of the radio receiver is reduced, for example, since one of the radio receiver circuits can be obtained with a relatively low cost (this is an advantage) in terms of, for example, circuit area and power consumption. The radio receiver 4 can be, for example, included in a communication unit. The communication unit can be, for example, but not limited to, a mobile communication unit (FIG. 1), a portable or handheld mobile radio communication unit, a mobile radio terminal, a mobile phone, a communicator, an electronic notebook, ... Smart phone or similar. The present invention can be embodied in a computer program product that implements the methods and functions described herein. The computer program, software, software, or software in this document can be executed when the computer is loaded and used in a computer-capable system. The software, code, or symbol of a set of instructions. Any expression that is intended to enable the processing of "the system" is performed directly or after conversion to another language, code or symbol. 122705.doc • 33- 200824312 Specific functions have been described above with reference to specific embodiments. However, other specific embodiments than the above may be implemented within the scope of the disclosure. In the fourth aspect of the present invention, a time-consuming step other than the above may be provided, which is carried out by hardware or software. The various features and steps of the invention may be combined in other combinations than those described above. The scope of the invention is limited only by the scope of the accompanying claims.

BRIEF DESCRIPTION OF THE DRAWINGS Other objects, features and advantages of the present invention will become apparent from Figure 2 is a block diagram of a radio receiver in accordance with an embodiment; and Figures 3a through c are block diagrams of a particular embodiment of a DC blocking unit, and Figure 4 is for operating a radio receiver. A flow chart of one of the specific embodiments; FIG. 5 is a flow chart of one of the steps of one of the steps shown in FIG. 4; and FIG. 6 is a step of the flow chart shown in FIG. A flow chart of another embodiment. [Description of main component symbols] 1 Mobile communication unit 2 Radio base station 3 Communication channel 122705.doc •34· 200824312 4 30 40 41 42 42a 43 44 45 46 47 60 61 62 63 64 65 Radio receiver AGC loop front end (FE) Unit Variable Gain Amplifier (VGA) DC Blocking Unit HP or BP Filter Analog to Digital Converter (ADC) Digital Low Pass (LP) Filter AGC Unit Signal Processing (SP) Unit Control Unit (CU) Switch First Sub Filter Second sub-filter switching filter component capacitor bank 122705.doc -35-

Claims (1)

200824312 X. Application for Patent Park: 1. A method for operating (10) electrical reception _ (4) is suitable for alternately in the - _ mode * 2 radio to take a communication channel (3) receiving capital, brother In a mode, the second version of the first mode of n $ $ π - the 输-type transmission aid receives data at a rate higher than the flying rate, which comprises: determining the communication channel (3) - Quality condition; · determining the operation in the communication channel mode according to the quality condition; assisting at least the second evaluation condition in the second evaluation, the at least one group is one of the conditions of the communication channel (3) Auxiliary operation in the second mode and configuration of the radio receiver (4) for: ... in the second mode if the configuration conditions are all satisfied - otherwise operating in the first mode. 2 • For the method of claim 1, the 1st neon 兮 & + state 该 电 电 叩 叩 叩 叩 包含 包含 包含 自动 自动 自动 自动 自动 自动 自动 自动 自动 自动 自动 自动 自动 自动 自动 自动 自动 自动 自动 自动 自动 自动 自动 自动 自动 自动 自动 自动 自动3. As in the method of claim 2, 苴 φ _ "eight-phase configuration of the radio receiver (4) for "one-of-a-kind operation including locking the automatic gain control loop (3 〇) one of the automatic gain control Unit (45). 4. The method of any one of claims 2 to 3, wherein the radio receiver is used to operate in the first mode comprises enabling the automatic gain control circuit ( 30) - a DC blocking unit (42), and the radio receiver (4) is configured to fine-tune the DC blocking early element (42) in the mode of the 篦-finger 4, 00. The method of any one of clauses 2 to 3, wherein the radio receiver (4) is configured to include the automatic gain control in the first One of the choppers (仏) of one of the DC blocking units (42), the frequency, and the first value, and the radio receiver (4) is configured to operate in the second mode. The waver (4 is called a cutoff frequency: and is again - a first value 'where the first value is higher than the second value. Wide: a method of asking for a term from 1 to 3, wherein the quality condition Is the signal-to-interference ratio of one of the pass channels (3). 7. According to the method of claim 6, the complex is also - the fourth mode (four) packet; ^^ the communication channel (7) is assisted in (3) the auxiliary (four) interference ratio exceeds Determining the value of the value of the communication channel (3) to assist in the operation of the second mode; or, otherwise, the message channel (3) is not assisted in the second mode, such as "item 1 to 3" The method further includes a period of two t): (four): _ material to determine whether the pre-data is used to assist in the second term:: (4) coffee receiving data; In the towel mode instead of in the first mode (3) =: configuration condition - the condition is expected to be passed through the communication channel (3) at any of the data rates to assist in the second mode. According to the method of claim 9, ft mode/receive data. The road (3) is determined by any of the capitalization rates, and is not expected to be sent through the communication communication at the m' Receiving data for receiving data in accordance with the second mode instead of the first mode, the 122705.doc 200824312 includes the number of data packet channelization codes to be derived for the data to be received based on the control data; Determining, according to the number of the greedy packet channelization code, whether the wanted channel (3) is to send the bedding to be received at any data rate, thereby assisting in the second mode instead of The data is received in the first mode. 10. In the method of claim 8, the method of determining whether it is expected to transmit the desired data (4) through the communication channel (3) at any of the data speeds (4), thereby assisting in the second mode instead of Receiving data in the first mode, comprising: deriving a modulation format to be used for the data to be received according to the control data; and determining, according to the n variable format, whether to expect any data rate to be transmitted through the communication channel (4) transmitting the desired (4) data to assist in receiving the data in the second mode instead of in the first mode. Rjt Item 8 wherein the method of determining whether the data to be received is to be transmitted at the data rate via the communication channel (7) to assist in receiving data in the second mode rather than in the first mode, Included, according to the remote control data, the code rate of one of the data to be received is used; and the code rate is used to determine whether it is expected to transmit the data to be received at any data rate through the communication channel. This assistance receives the data in the second mode of the 122705.doc 200824312 rather than in the first mode. 12. The method of any one of claims 1 to 3, wherein the communication channel (3) is a high speed downlink packet access communication channel. The method of any one of clauses 3 to 3, wherein the communication channel (3) is a positive-father frequency division multiplexing communication channel. Φ 14. A computer readable medium having stored thereon a computer program, comprising an electrical code component for performing a request when the computer code component is run by an electronic device having one of computer capabilities The method of any one of items 1 to 3. 15. The two types of adjustments are applied to a radio receiver that receives data through the fifth channel (3) alternately in a first mode and a second mode (sentence, wherein the first mode assists the south mode) The data rate receiving data, the signal processing unit (46) is adapted to determine a quality condition of the communication channel (3); and a control unit (47), 苴系纲,备田#),糸 适用 适用 : : 适用 适用 适用 适用 适用 适用 适用 适用 适用 适用 适用 适用 适用 适用 适用 适用 适用 适用 适用 适用 适用 适用 适用 适用 适用 适用 适用 适用 适用 适用 适用 适用 适用 适用 适用 适用 适用 适用 适用 适用 适用 适用 适用 适用 适用 适用 适用Determining the communication channel (3) as auxiliary in the second electrical receiver (4) configured to: operate, and operate the wireless at least one configuration condition to satisfy the operation in the formula; or you & One 杈 - otherwise it operates in this first mode. 16. The radio receiver of claim 15 further comprising 122705.doc 200824312 an automatic gain control loop (30); wherein the control unit (47) is adapted to configure the automatic gain control loop (30) The radio receiver (4) of claim 16, wherein the automatic gain control loop (30) comprises a variable gain amplifier (41); An automatic gain control unit (45) configured to control a gain of the variable gain amplifier (41); wherein the control unit (47) is adapted to lock the automatic gain control unit (45) to In the second mode. The radio receiver according to any one of claims 16 to 17, wherein the automatic gain control loop (30) includes a DC blocking unit (42). 19. A radio receiver as in claim 18. (4) wherein the control unit (47) is adapted to enable the DC blocking unit (42) in the first mode and to disable the DC blocking unit (42) in the second mode. The radio receiver (4) of claim 18, wherein the DC blocking unit (42) comprises m (42a) ' and the control unit (47) is adapted to apply _ wave evil 2a in the first mode - The cutoff frequency is set to a -first value and is set to a second value in the second mode, wherein the first value is higher than the second value. 21. The quality condition of any one of claims 15 to 17 is one of the communication channels (3), such as the radio receiver (4) of the radio receiver item of claim 21, wherein the tune applies to the signal The interference ratio exceeds the one-detection-to-interference ratio. (4), wherein the control unit (47) determines the communication when the value is limited. 122705.doc 200824312 Channel (3) assists operation in the second mode. 23. The radio receiver (4) of any one of clauses 15 to 17, wherein the signal processing unit (46) 俜 half of the %mv is in the system) is adapted to receive signal control from the received signal: And the control unit (47) is further adapted to determine, according to the control data, whether or not it is expected to transmit through the channel (3) at any rate of interest. According to this, in the second mode, rather than in the mode, the mode φ is priced... and wherein the at least-configuration condition tr is expected to be transmitted through the communication channel (7) at any data rate. The data, 虔, ', 舒(四)一+ 乂 Assist in receiving data in this second mode rather than in the mode of the younger brother. 24. If the radio of claim 23 receives crying ^ u (), the control unit (47) is adapted to use a y-adjustment to derive the cultivating material to be used for receiving according to the pledge. The number of the channelization code of the nurturing packet is '^ Ώ + and depends on the number of the channelization code of the greedy packet to determine whether or not the pre-5 Ke Shen oblique m~ 』 will pass the communication channel (3) to the IKE; The rate of the bucket is transmitted. 4 Φ A is not + to assist in receiving data in the second mode instead of in the first mode. 25. The radio receiver of claim 23, wherein the control unit (47) is further adapted to be used for the 6 weeks of the beggar to be received according to the control element #401-^^^蜒 format and according to the modulation format, β transmits the data to be received through the communication channel (3) in the current order, or does not expect ( ) ^ (4) material to be assisted in the second mode. Received information. Ning, rather than in the far-first mode, 26. The radio receiver of claim 23, 隹一牛 nw) wherein the remote control unit (47) is y-adjusted to be used according to the control leaf One of the 122705.doc 200824312 data to be received and based on the code rate, ga μ, 术 疋疋 疋疋 疋疋 预期 预期 预期 预期 预期 该 “ “ “ “ 通道 通道 通道 通道 通道 通道 通道 通道 通道 通道 通道 通道 通道 通道 通道 通道 通道 通道 通道 通道 通道 通道 通道The data to be received is used to assist in receiving data in the second mode instead of the F-side brother. The radio receiver (4) of any of items 15 to 17, wherein the pass. eight M3 The ##n downlink packet receives the communication channel. 28. The radio receiver (4) of claim 15 to 17, wherein the communication channel (3) is an orthogonal frequency division multiplexing communication channel. A unit (1) comprising the radio receiver (4) 〇1 of any one of claims 15 to 17; the item 2: the communication unit (1), wherein the communication unit is a portable type 5 Mobile radio communication unit, a mobile radio terminal, a mobile phone, a pager, a communicator, a Electronic notebook or a smart phone. 122705.doc