TW201014238A - Communication device, antenna switching method, and program - Google Patents

Abstract

An antenna switching method of the present invention comprises a CINR monitoring step of monitoring CINR of a signal in the first frequency band for each of a plurality of antennas for at regular intervals, a CINR comparing step of comparing an average value for a preceding certain period and the latest value of CINR of the signal in the first frequency band for each of the plurality of antennas, a first RSSI monitoring step of monitoring RSSI of the signal in the first frequency band for each of the plurality of antennas at regular intervals, a first RSSI comparing step of comparing an average value for a preceding certain period and the latest value of RSSI of the signal in the first frequency band for each of the plurality of antennas, and a selecting step of selecting one of the plurality of antennas in accordance with determination criteria using the result of the comparison between the average value and the latest value of RSSI and CINR of the signal in the first frequency band at each of the plurality of antennas, and instructing a switching unit to switch to the selected antenna.

Description

201014238 VI. Description of the Invention: [Technical Field of the Invention] The present invention relates to a communication device, an antenna switching method, and a program. [Prior Art] The Worldwide Interoperability for Microwave Access (WiMAX) Forum has been designed based on the IEEE (Electronic and Electrical Engineering Association) 802.16e standard to provide WiMAX communication with a communication speed of more than 20 Mbps (although for wireless). Communication). Therefore, it is assumed here that WiMAX communication is used as an alternative to fixed high-speed communication such as Asymmetric Digital Subscriber Line (ADSL) and several techniques for WiMAX communication have also been proposed (for example, see Patent Document) 1). However, 'WiMAX is allocated to the 2.5 GHz band', its wireless local area network (WLAN) communication device, Bluetooth communication device, and ISM (Industrial Scientific Medical) band such as digital wireless telephone (2 4 GHz band) The frequency bands are adjacent. Therefore, the 'WiMAX communication device is very susceptible to interference from the ISM_band communication device, which can cause interference waves that can degrade the communication quality of the desired wave (2.5 GHz band) in WiMAX communication. 4 In order to solve the problem of deterioration of communication quality of the above WiMAX communication, for example, it is conceivable to control a media access control (MAC) layer, and

A method of communication timing between a WiMAX communication device and an ISM_band communication device. However, 'ISM-band communication devices such as microwave ovens, digital radiotelephones, and the like do not have communication timing and _ weight control means. Shame, does not cover the control of a communication device (such as a microwave oven), the degree to which the above method disturbs the wave in some cases. Therefore, it should be considered that in the future, the WiMAX communication device itself will gradually reduce the degree of interference waves from the ISM-band communication device (which uses the adjacent frequency band) 201014238 as disclosed in Patent Document 1, in order to be on the WiMAX communication device side. To reduce the degree of interference 'waves, an exemplary method can reduce the degree of interference waves by switching the number of lost lines according to the reception quality. In another example, as disclosed in Patent Document 2, a filter may be provided to reduce the degree of interference waves.

Patent Document 1: JP-2008-136089A Patent Document 2 ·· JP-2007-288455A However, the method disclosed in Patent Document 1 uses only carrier-to-interference plus noise ratio (CINR) or received signal. The RSSI (Received Signal Strength Indication) is used to determine whether to switch from one antenna to another, so that, for example, even if the CINR is degraded, the above method cannot correctly determine whether the degradation is caused by an increase in the degree of the interference wave. Therefore, the above method means a problem that even if one antenna is switched to another antenna, the degree of interference wave & On the other hand, in the method disclosed in Patent Document 2, since the important interference wave comes from the ISM-band communication device using the adjacent frequency band, a filter of a larger size is required to reduce the degree of the interference wave. Thus, the above method has a problem in that an increase in the size of the filter leads to an increase in transmission line loss.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a communication device, an antenna switching method, and a program that can more accurately determine the degree of interference waves, thereby more reliably reducing the degree of interference waves and avoiding transmission lines by antenna switching. The increase in road losses. The communication device of the present invention transmits a signal of a first frequency band as a desired wave to perform wireless communication. The communication device comprises: a plurality of antennas which are different from each other in directivity; a switching unit for switching a plurality of antennas; a plurality of CINR (carrier to interference and noise ratio) monitoring units, and a pair of receiving brothers CINR of the signal; 201014238 A complex CIKR comparison unit 'each set to correspond to the average of the previous fixed period of the CINR of the signal of the first frequency band received by the corresponding antenna Comparing with the latest value; a plurality of first RSSI (Received Signal Strength Indication) monitoring units, each configured to each of the plurality of antennas, monitoring the first frequency band received by the corresponding antenna at @determination intervals The RSSI of the signal; the first RSSI comparison unit of each of the plurality, each configured to correspond to a plurality of antennas, which will be the previous ingenious period of the RSSI of the signal of the first frequency band received by the corresponding antenna The average value is compared with the latest value; and the book selection element is based on the ratio of the average value of the rssi of the first frequency received by each of the plurality of antennas to the latest value. The comparison result and the criterion for comparing the average value of the CINR of the received signal with the latest value are used to select one of the plurality of antennas, and the switching unit is instructed to switch to the selected antenna. ▲, ^ Invented antenna switching method is implemented by the execution of a communication device, which includes a plurality of antennas that are different in directivity from each other, and an antenna unit that switches the complex antennas. Performing wireless communication by using a signal of the first scale as a desired wave, the method comprising: a CINR monitoring step of monitoring, for each of the plurality of antennas, the first received by each of the plurality of antennas at regular intervals CINR of the signal in the frequency band; - CINR comparison step, for each of the plurality of antennas, the average and the latest of the previous fixed period of the signal in the first frequency band received by each of the plurality of antennas The values are compared; the first RSSI monitoring step monitors, at a fixed interval, the RSSI of the signal in the first frequency band received by each of the plurality of antennas for each of the plurality of antennas; the: RSSI comparison step 'for Each of the plurality of antennas compares an average of the previous fixes of the RSSIs of the signals in the first frequency band received by each of the plurality of antennas with the most recent value, And the selecting step, based on the comparison between the average value of the RSSI of the signal in the first band received by each of the plurality of antennas and the latest value, and the average value of the CINR of the received ## and the latest value The determination result of the comparison result selects one of the antennas of the plurality of antennas in 201014238, and instructs the switching unit to switch to the selected line. And a program for causing a communication device to execute a program comprising: a plurality of antennas that are different in t-direction from each other, and a switching unit for switching a plurality of antennas and transmitting signals through the first frequency band As the desired wave to perform wireless communication: , , - CINR monitors the sequence of 'the hiding day', the interval is monitored by the signal in the first frequency band received by each of the plurality of antennas (: 1 >^; CINR - CINR comparison procedure, for each of the complex antennas, the previous _ average value and the rhyme value of the CINR of the signal in the first frequency band received by each of the complex days; ^ 1 ^ The RSSI monitoring program, for each of the plurality of antennas, monitors the discrimination of signals in the first frequency band received by each of the plurality of antennas; the second RSSI comparison procedure 'for each of the plurality of antennas The average value of the previous solid state of the signal 2RSSI2 in the first frequency band received by the mother of the plurality of antennas is compared with the latest value; and the line selection is based on the antenna of the complex number of the intestines. Received Selecting the comparison result between the average value of the frequency ^ ^iRSSI and the latest value and the judgment result of the comparison result between the received value and the latest value, and selecting the antenna of the plural number and indicating the switching unit to switch to the The selected communication device of the present invention switches one antenna to the other by comparing the average value between the average value and the latest value of each of the plurality of antennas. In the determination of the antenna switching, the increase of the miscellaneous line loss caused by the setting of the reed == description. The following is a description of the preferred embodiment of the present invention with reference to the accompanying drawings. The following exemplary embodiment will be described with respect to the WiMAX communication package, which uses the signal of the 2.4-GHz band as the period f wave to perform: low from: [SM-band communication device (which uses the 2.5_GHz band_band & The degree of the disturbance wave, but it should be understood that the present invention is not limited thereto. The present invention can reduce the general communication device from the other wire (the New Zealand thief band adjacent to the fresh, disturbing wave degree. Shown, this example The communication device of the embodiment comprises: n (n is 2 natural numbers) antennas 10_1~l〇-n; antenna switching unit ^; WiMAX operation 12; antenna management units 13-1~13_n, which are arranged to correspond to Each of the n antennas 10 10-1 to 10-n; the antenna selection unit 14; and the candidate antenna are units 15. The antennas 10-1 to 10-n are different in directivity from each other. The antenna switching unit 11 switches to The antenna selected by the antenna selecting unit 14 from among the antennas 1〇1 to 1〇η.

The WiMAX operation unit 12 performs WiMAX communication processing such as modulation processing of a transmission signal transmitted from the selected antenna, and demodulation processing of a reception signal received by the selected antenna. In this regard, since the WiMAX operation unit 12 is provided in a general WiMAX communication device and its construction and operation are conventional, detailed description thereof will be omitted. Each of the antenna management units 13-1 to 13-n includes a WiMAX CINR monitoring unit 131, a WiMAX CINR recording unit 132, a WiMAX CINR comparing unit 133, a WiMAX RSSI monitoring unit 134, a WiMAX RSSI recording unit 135, a WiMAX RSSI comparing unit 136, and a neighboring frequency band. The RSSI monitoring unit 137, the adjacent band RSSI recording unit 138, and the adjacent band RSSI comparison unit 139. Here, the operation of the above-described elements in the antenna management unit 13-1 will be explained.

The WiMAX CINR monitoring unit 131 monitors the CINR of the signal (desired wave) in the 2.5-GHz band of wiMAX received by the antenna 1 〇_1 at regular intervals (e.g., in one second. The same applies to the following description). Hereinafter, the CINR of the signal in the 2.5-GHz band is called "WiMAX CINR". Moreover, the above-mentioned fixed interval example 8 201014238 is illustrative in all sense and not limiting. • The WiMAX CINRB recording unit 132 has recorded the wiMAX CINR monitored by the WiMAX CINR monitoring unit 131 during a fixed period (e.g., one minute, the same below). However, the fixed period is illustrative in any sense and not limiting.

The WiMAX CINR comparing unit 133 compares the average value of the previous fixed period of the WiMAX CINR recorded by the WiMAX CINR recording unit 132.

The WiMAX RSSI monitoring unit 134 monitors the rssi of the signal in the 2.5-GHz band of the WiMAX received by the antenna 1 (M) at a fixed interval. Hereinafter, the RSSI of the signal in the 2.5-GHz band is referred to as "WiMAX RSSI".

The WiMAXRSSI recording unit 135 records the WiMAX RSSI monitored by the WiMAX monitoring unit 135 during the fixed period.

The WiMAXRSSI comparing unit 136 compares the average value of the previous fixed period of the WiMAX RSSI recorded by the WiMAX RSSI recording unit 134 with the latest value. The adjacent band RSSI monitoring unit 137 monitors the RSSI of the signal (interference wave) in the 2.4-GHz band (ISM band) received by the antenna at regular intervals. Hereinafter, the rSSI of the signal in the 2.4-GHz band is referred to as "adjacent band RSSI". The adjacent band RSSI recording unit 138 records the adjacent band RSSI monitored by the adjacent band ❹ RSSI monitoring unit 137 during the fixed period. The adjacent band RSSI comparing unit 139 compares the average value of the previous fixed period of the adjacent band RSSI recorded by the adjacent band RSSI recording unit i38 with the latest value. The antenna selecting unit 14 collects the comparison result between the average value and the latest value of the WiMAX CINR at the antennas 10-1 to 1〇-η by the antenna management units 13-1 to Ι3·n, and the average value of the WiMAX RSSI and The latest version of the comparison between the latest value and the comparison between the average of the adjacent band RSSI and the latest value. The antenna selection unit 14 also includes a determination reference table 141 that defines a determination criterion used in the determination of the antenna switching in advance, and based on the WiMAX CINR comparison result using the antennas i〇_i to ι_η, the WiMAX RSSI comparison result, and the adjacent frequency band. 201014238 RSSI comparison results of the judgment criteria from the antenna 1 (Μ ~ ι 〇 天线 天线 天线 天线 天线 天线 天线 天线 天线 天线 天线 天线 。 。 。 。 。 。 。 。 。 。 。 。 。 陈 陈 陈 陈 陈 陈 陈 陈 陈 陈 陈 陈 陈 陈 陈 陈 陈 陈 陈 陈 陈Determine whether the main decision of the currently selected antenna should be switched. If the line is selected, the unit U cannot determine whether the current RSSI should be switched at this time. Then, the RSSI comparison of the adjacent band using the currently selected antenna is performed. It is judged whether the secondary decision of the current antenna should be switched. From the case of 'waiting antennas', the average value of WiMAXClNR is collected from the corresponding unit to all the antenna management units. The data 'and the WiMAX c ship from the remaining antennas sequentially use only a predetermined number of remaining antennas. Selecting f疋 in the primary or secondary determination determines that the current selection = ΐϋ selection unit 14 selects one of the antennas used by the candidate antenna employing unit 15 for the number of preambles. In particular, the 'antenna selection unit 14 will be used by the face. The value of = is compared with the predetermined current used by the candidate antenna employing unit 15. If the comparison result shows that the antenna is now selected to exhibit the most average value, then the switching of the antenna is now suspended. Jin 2, Figure 3 illustrates the basis The operation of the communication device of the exemplary embodiment. In this case, the antenna ι〇_ι has been selected. Referring to FIG. 2 'the antenna management unit is called ^^, the WiMAX CINR, WiMAX dirty, ^ad And compare the average value of the previous fixed period with WiMAxcH=RSSI, the adjacent J-band, and compare the latest value of each of them (step A2). Then, the antenna selection unit 14 selects the antenna 1〇1 now. The average value of the average health value of wiMAx and the average value of the WiMAx ship's are based on the judgment criteria of Fig. 3 to perform the main decision of determining whether the antenna should be switched (step Α3). 14 In the main decision, it is not determined that the antenna call should be switched 10 201014238 (No in ff 1), then the antenna selection unit 14 refers to the determination criterion of FIG. 3 and the average value and the latest value of the adjacent band RSSI of the M antenna. The result of the comparison of the values 'execution determination now selects whether or not the antenna HM should be switched. (The step line selection unit 14 determines in the secondary determination that the antenna (1)-1 is not currently being replaced by the knife (step 为6 is NO), Then the process returns to the processing of step A1. - 嗔 Antenna, select the above-mentioned main or secondary decision operation of unit 14 and set the 'waiting antenna adoption unit 15 to use the antenna 1 (the WiMAXCINR^ average and the latest in the day other than M) As a result of the comparison of values, the highest average value of the job x CINR from the day of the day 22 is sequentially only = the pre-reading goal line (step A7). It is assumed here that the two antennas i G have been selected. Since the antenna selecting unit M determines in the main decision or the secondary decision that the k-taking antenna 10-1 should be switched, the antenna selecting unit 14 selects the antenna from t of the antennas 1〇_2, 1〇_3, And instructing the antenna switching unit u to switch to the selected one. ; ===; - as indicated by the antenna selection unit 14 however, the antenna selection unit 14 compares the previously selected antenna 10-1 with the average value of the WiMAX CINR of the antenna 10_2, ❹ = ,, if the antenna exhibits an average value, Then the antenna 丨 (7) 丨 is switched. Here, the primary and secondary decision operations of the antenna selection unit 14 will be described in detail with reference to FIG. [Major decision] In the main decision, the antenna selection unit 14 first determines the difference between the new value of WiMAXQNR and the average value, 4 [dB thief taste, and judges "increase" when the threshold value is greater than the threshold value. ;# The latest value is less than the average i small threshold. It is determined in other cases that the "indeterminate threshold" is arbitrarily arbitrary on any A, and is not limited to a specific value. ... Similarly, the antenna selection unit 14 compares the difference between the latest value and the value of the wiMAXRSSI with a threshold (for example, '6'), and when the latest value is greater than the mean value by a threshold value, the value is greater than the average value. When the value is smaller than the threshold, 11 201014238 determines "reduction"; in other cases, it determines "unchanged". The exemplary value is illustrative in any sense and is not limited to a particular value. 0 Next, the antenna selection unit 14 determines whether the antenna 10-1 should be switched depending on which of the following comparison results falls. . (A) When the WiMAX RSSI has been "increased" and the wiMAX CINR is "always". θ』 In this case, since the WiMAX CINR is not deteriorated, it can be judged that the expected wave of the 25_GHz band is a normal radio wave condition, and the degree of the interference wave of the antenna 1〇_丨 is not increased. Further, the 'antenna selection unit 14 determines that the antenna i〇_i should not be switched. (B) When WiMAX RSSI has been "increased" and WiMAX CINR has been "decreased". ❹ In this case, regardless of the fact that WiMAXRSSI has “increased”, χ]ν^χ CINR has deteriorated, so that it cannot be judged whether the deterioration is caused by an increase in the degree of interference waves. Therefore, the antenna selection unit 14 shifts to the secondary determination. (C) When WiMAX RSSI has been "decreased" and WiMAX CINR has "increased or remained unchanged." In this case, since the WiMAX CINR is not degraded, it can be judged that the expected wave of the 2.5-GHz band is a normal radio wave condition, and the degree of the interference wave of the antenna 1〇_1 is not increased. In addition, since the WiMAX RSSI has been "reduced", it is highly probable that the wave condition of the wave will be poor. Due to this evaluation, it can be judged that although the WiMAX CINR exhibits a small value, it is mainly due to the expectation that the wave deteriorates. Therefore, the antenna selecting unit 14 determines that the antenna 1〇_1 should not be switched. (D) When WiMAX RSSI and WiMAX CINR have been reduced. In this case, since the WiMAX RSSI has been "decreased" when the WiMAX CINR is degraded, it can be judged that the deterioration is mainly caused by the deterioration of the state of the desired wave rather than the increase of the interference wave. Therefore, the antenna selecting unit 14 determines that the antenna 10-1 should not be switched. (E) When the WiMAX RSSI remains "unchanged" and the WiMAX CINR has been "knowed or remains unchanged." "』 12 201014238 - The miKt=iMAXCINR is not degraded, and it can be judged that the 2.5_GHz frequency is the positive wave condition, and the antenna 1 (the degree of the interference wave of M does not increase. Therefore, the antenna selection unit 14 determines the antenna 10-1 should not be switched. (F) When WiMAX RSSI remains "unchanged" and WiMAX CINR has been reduced

In this case, regardless of the fact that the WiMAX RSSI remains "unchanged", the WiMAX CINR has deteriorated, so that its irrelevant degraded shirt is mainly caused by an increase in the degree of interference waves. Therefore, the antenna selection unit 14 shifts to the secondary determination. [Secondary judgment]

In the secondary determination, the antenna selection unit 14 first compares the difference between the latest value of the adjacent band and the average value with a threshold (for example, '1〇[dBD, and when the latest value is greater than the average value by a threshold value or more) Then determine "increase"; when the latest value is greater than the average & small threshold, then determine "decrease"; in other cases, determine "unchanged". The exemplary threshold is descriptive in any sense, and is not limited Next, the antenna selecting unit 14 determines whether the antenna 10-1 should be switched depending on which of the following cases is applicable to the determined comparison result. (a) When the WiMAX RSSI has been "increased" and the WiMAX CINR has been reduced (a-Ι) When the adjacent band RSSI has been "increased". / In this case, it can be judged that the deterioration of the WiMAX CINR is mainly caused by an increase in the degree of the interference wave. / Therefore, the antenna selecting unit 14 determines the antenna 10-1. It should be switched. (a-2) When the adjacent band RSSI remains "unchanged" or "decreased". In this case, it can be judged that the deterioration of WiMAX CINR is mainly caused by an increase in the degree of interference waves. selected The selection unit 14 determines that the antenna 10-1 should not be switched. (b) When the WiMAX RSSI remains "unchanged", the WiMAX CINR has been reduced.

(b-Ι) When the adjacent band RSSI has been "increased". ^ J In this case, it can be judged that the deterioration of WiMAX CINR is mainly caused by an increase in the degree of interference waves. Therefore, the antenna selecting unit 14 determines that the antenna 10-1 should be switched. 13 201014238 〇2) When the adjacent band RSSI remains "unchanged" or "decreased". In this case, it can be judged that the deterioration of WiMAXCINR is mainly caused by an increase in the degree of interference waves. Therefore, the antenna selection unit 14 determines that the antenna should not be switched. In this exemplary embodiment, as described above, the average value and the latest value of the previous fixed period of each of the WiMAX RSSI and WiMAX c legs of the antenna 丨~丨'~1〇_η are used. The result of the comparison is that the antenna is switched to another antenna.

Since the degree of interference wave can be more accurately determined by using WiMAX RSSI and WiMAX CINR in the determination of antenna switching, antenna switching can reduce the degree of interference wave. Specifically, in the determination of the antenna switching, it can be determined whether the WiMAX CINR degradation is due to an increase in the degree of the interference wave (2.4-GHz band) or due to any other factor (for example, the condition of the desired wave (2.5-GHz band) deterioration). In this way, when the degradation of the WiMAX CINR is mainly caused by the increase in the degree of the interference wave f, the degree of the interference wave can be lowered by switching the antenna to another, thereby making the antenna between the desired wave and the interference wave. The degree of integration is lowered to reduce the amount of deterioration in the communication quality of the desired wave of communication. In addition, since the above antenna switching can reduce the degree of interference waves without using a filter which is provided as a mussel component, it is possible to avoid an increase in transmission line loss due to the setting of a large-sized filter. However, in some cases, only WiMAX CINR and WiMAX RSSI are not used to determine whether the degradation of WiMAX CINR is mainly caused by an increase in the degree of interference waves. In this case, the comparison of the average value of the previous fixed period of the adjacent band RSSI with the latest value can be used to determine whether the degree of the interference wave is increased. In this way, it can be more completely determined whether the degradation of the WiMAX CINR is mainly caused by an increase in the degree of the interference wave. Further, in the present exemplary embodiment, the = line presenting the high average of the WiMAX CINR has been previously employed from the remaining antennas other than the currently selected antenna, and when the antenna switching is performed, the currently selected antenna is switched to the previous One of the antennas used. , 14 201014238

In this way, the antenna can now be switched to an antenna that exhibits a higher WiMAX CINR •. However, if the average WiMAX CINR of the selected antenna is higher than the candidate antenna used, the antenna switching is aborted. In this way, if the WiMAX CINR is degraded, the antenna switching is avoided. 0. The method performed by the invented communication device can be applied to enable the computer to execute the method. The ii file is stored on the computer readable recording medium. Through the net

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT The present invention has been described and illustrated in detail with reference to the exemplary embodiments. FIG. 1 is a schematic diagram of a schematic diagram of a rare embodiment of the present invention. FIG. 3 is a diagram for explaining the determination reference table shown in FIG. 1, and [description of main component symbols] 10-1 antenna l〇-n antenna 11 antenna switching unit 12 WiMAX operation unit 13-1 antenna management unit 13-n Antenna Management Unit 131 WiMAX CINR Monitoring Unit 132 WiMAX CINR Recording Unit 133 WiMAX CINR Comparison Unit 15 201014238 134 WiMAXRSSI Monitoring Unit 135 WiMAXRSSI Recording Unit. 136 WiMAXRSSI Comparison Unit 137 Adjacent Band RSSI Monitoring Unit 138 Adjacent Band RSSI Recording Unit 139 Adjacent Band RSSI Comparison Unit 14 Antenna selection unit 141 determines the reference table 15 candidate antenna adoption unit

A1 monitors WiMAX CINR/WiMAX RSSI/adjacent frequency band RSSI and Q A2 at regular intervals. Compares the average value and the latest value of WiMAX CINR/WiMAX RSSI/adjacent frequency band RSSI. A3 Main antenna switching decision A4 Whether to switch A5 Secondary antenna switching decision A6 Whether to switch A7 uses alternate antenna A8 to switch antenna

16

Claims (1)

201014238 VII. Patent application scope 1. A communication device, which performs wireless communication, and includes: an antenna for transmitting the number of signals in the first and the second, which are different in directivity; a switching unit, An antenna for switching the complex number; - a plurality of CINR monitoring units, each configured to correspond to the complex number, each of which monitors the CINR of the signal received by the corresponding antenna at intervals of 'carrier-to-interference interference吼 ) · · 弟 弟 — — — — — — — — — — — C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C The average health-critical comparison of the fixed classes; Λ ° ~ the plural - the RSSI monitoring unit 'is each set to correspond to each of the complex days, which monitors the 接收 received by the corresponding antenna at regular intervals RSSI with the signal (received signal strength indication); μ ' - a plurality of first RSSI comparison units, each set to correspond to each of the complex antennas, which will be received by the corresponding antenna Comparing the average of the previous fixed periods of the RSSI of the signal of the first frequency band with the latest value; and selecting a unit based on the RSSI of the signal of the first frequency band received by each of the plurality of antennas Selecting the comparison between the average value and the latest value and the criterion for comparing the average value of the C!NR of the § § to the latest value to select one of the plurality of antennas, and instructing the switching unit to Switch to the antenna. 2. The communication device of claim 1, wherein the selection unit compares the average value of the RSSI of the signal in the first frequency band received by the currently selected antenna with the latest value and the received signal The determination criterion of the comparison between the average value of the CINR and the latest value determines whether the currently selected antenna should be switched, and when the currently selected antenna should be switched, one antenna other than the currently selected antenna is selected. 17 201014238 ^ The communication device of claim 2, wherein: the ratio of the latest value of the RSSI of the signal of the first band to the RSSI is increased: and the first fresh-like CINR is The decision criterion indicates that the currently selected antenna should not be switched when the most heard and the value = increase or remain unchanged. 4: The communication device of claim 2, wherein: when the latest value of the RSSI of the signal in the first frequency band is compared with the average value of the RSSI, the determination criterion indicates that the currently selected antenna should not Switched. 5. The communication device of claim 2, wherein: @ when the latest value of the RSSI of the signal in the first frequency band is compared with the average value of the RSSI, and the CINR of the signal in the first frequency band When the latest value is compared to the average value of d as increasing or remaining unchanged, the decision criterion indicates that the currently selected antenna should not be switched. 6. The communication device of claim 2, further comprising: a plurality of second RSSI monitoring units 'each arranged to correspond to each of the plurality of antennas' which are monitored by the corresponding antenna at regular intervals Receiving an RSSI of a signal of a second frequency band adjacent to the first frequency band; and a second RSSI comparing unit of the complex number, each of which is configured for each of the plurality of antennas to be "the antenna to be used by the corresponding antenna Comparing the average of the previous fixed period of the RSSI of the signal of the received second frequency band with the latest value of the RSSI, wherein the selection unit is responsive to the second frequency band received by the currently selected antenna The decision criterion of the comparison of the average value of the RSSI of the signal with the latest value determines whether the currently selected antenna should be switched. 7. The communication device of claim 6, wherein: the latest value of the RSSI of the signal in the first frequency band is increased compared to the average value of the RSSI, and the latest value of the CINR of the signal in the first frequency band is When the average value of CINR is 18, 2010, the comparison between the two is reduced: If the RSSI of the money is increased, the reference of the reference should be the antenna of the current view, such as the second frequency band. When the latest value of the RSSI of the signal and the RSSI are unchanged or reduced, the decision criterion indicates that the selected antenna is not in the communication device of the sixth application scope, wherein: ❹ when the first frequency band The latest value of the RSSI of the signal and the RSSI level remain relatively unchanged, and the average value of the latest value 盥c of the CINR of the signal in the first frequency band is compared to decrease: > if the second frequency band RSS of the signal; [when the latest value is compared with the RSSI level, the decision criterion indicates that the currently selected antenna should be switched; and if the latest value of the RSSI of the signal in the second frequency band is compared with the average of the RSSI To protect When the same or decrease, the determination indicates that the reference should now select the antenna is not switched. 9. The communication device of claim 6 of the patent scope further comprises: a grabbing unit, which is the highest CINR of the remaining antennas other than the currently selected antenna, © The average value employs a predetermined number of antennas, wherein the selection unit selects one of the determined number of employed antennas when the currently selected antenna should be switched. 10. The communication device of claim 9, wherein the selection unit averages the CINR of the signal in the first frequency band presented by the currently selected antenna, and the number of antennas used by the number of antennas The average of the CINRs of the k-numbers of the first band of the present invention is compared, and if the currently selected antenna exhibits the highest average value, the switching of the currently selected antenna is suspended. 19 201014238 11. The method of the kind of scales, by (4) money set execution, Wei Fu set the sentence in the direction of the plural of the different aspects of each other, and use °, wireless communication, the method includes: corpse% money 峨 CINR Monitoring the tilt, for each of the plurality of antennas of the plurality of antennas, (4) the greener t of the first frequency band is greater than t for each of the plurality of antennas, and the mother of the plural $= - the average value of the ship's period of the signal in the first solution received by the person is compared with the latest value; The first RSSI monitoring step, for each of the plurality of antennas, the signal of the first fresh towel is used for each of the plurality of antennas. ^Kj>Si, Zhao Xii: Risui is more stepwise than Each of the plurality of antennas compares an average value of the rssi of the signal in the first frequency band received by the multiplexed line to the latest value with the latest value; and a selection step According to the comparison between the average value of the RSSI of the nickname and the latest value of the nickname received by each of the plurality of antennas, the average value and the latest value of the CINR of the woven fabric are obtained. Judgment of comparison results The reference selects one of the plurality of antennas and instructs the switching unit to switch to the selected antenna. 12. If the scope of the patent application is the third! The antenna switching method of the item, wherein the selecting step comprises: comparing the average value of the signal RSSI of the first frequency band received by the currently selected antenna with the latest value, and the CINR of the received signal The determination result of the comparison result of the latest value determines whether the currently selected day should be switched, and when the currently selected antenna should be switched, one antenna other than the currently selected antenna is selected. 13. For example, in the antenna switching method of claim 12, wherein: 20 201014238 ΐΐ the second line switching method of the second item, wherein: - - ίίΐΐ 12 items of things are changed to green, where: ^ ^ ^ RsSI average ratio The average value is equal to ί2?1, when the C value of the latest value and the CINR field remain unchanged, the decision criterion indicates that the current selection is 16. The antenna switching method of claim 12, including the p Depending on the step, for each of the complex antennas, the fixed inter-frequency is followed by the second second of the frequency band - the RSSI comparison step, for each of the complex antennas, the line will be Comparing the average value of the RSSI of the signal of the second frequency band received by the first frequency band with the latest value of the RSSI, the selection step includes the use of the selected antenna The average of the RSSI of the signal received by the second frequency ▼ is compared with the latest value to determine whether the currently selected antenna should be switched. 17. The antenna switching method of claim 16, wherein: the latest value of the RSSI of the signal of the first frequency band is compared with an average value of the RSSI, and the CINR of the signal of the first frequency band is the latest. When the value is compared with the mean value of CINR, it is reduced: 〃 21 201014238 If the edge of the second frequency band 彳 s says that the latest value of the RSSI is increased compared with the average value of rssi, the decision criterion indicates that the currently selected antenna should be switched. ·, and. If the latest value of the RSSI of the second frequency band is compared with the average value of rssi to remain unchanged or decreased, the decision criterion indicates that the currently selected antenna should not be switched. 18. The antenna switching method of claim 16, wherein: the latest value of the RSSI of the signal in the first frequency band is compared with the average value of the RSSI, and the signal of the first frequency band is When the latest value of CINR is compared with the average value of CINR as a decrease: 假 If the latest value of the RSSI of the signal in the second frequency band is increased compared with the average value of RSSI, the determination criterion indicates that the currently selected antenna should be Switching; and if the latest value of the RSSI of the signal of the second frequency band is kept constant or decreasing compared to the average of the RSSI, the decision criterion indicates that the currently selected day should be switched. 19. The antenna switching method of claim 16 further includes: a step of using the remaining antennas other than the currently selected antenna, and sequentially presenting the first frequency band of the letter The highest average of the CINRs is a predetermined number of antennas, wherein the selected one of the antennas is selected when the currently selected antenna should be switched. 20. The antenna switching method of claim 19, wherein the CINR average of the CINR of the first frequency band to be presented by the currently selected antenna is _the antenna = Comparison of the average of the CINR of the first band, the number of CINRs, if the current selected 'antenna exhibits the highest average value'. 21. A program for causing a communication device to execute the following program, the communication device comprising 22 antennas of 201014238 and a CINR monitoring program for switching the complex antennas, and looking at the waves to perform wireless communication. Each of the antennas received by the second band for two days around the mu for the complex antenna will be the average and latest of the CINR2 of the signal in the complex frequency band. The value is compared; the: RSSI monitoring program 'for each of the plurality of antennas, the signal of the band-band band received by each of the fixed number of antennas: the RSSI comparison procedure' for the complex number Each of the antennas compares the average value of the Rssi of the signal in the first frequency band received by each of the lines with the latest value; and the selection procedure, based on the fine a comparison between the average value of the RSSI of the signal in the frequency band received by the plurality of antennas and the latest value, and the comparison result of the comparison between the average value of the received CINR and the latest value * ^ Select which of the plurality of antennas - persons, and instructed her to the defeat of the essays evening lost record. 22. The program of claim 21, wherein the selection procedure is based on a comparison of an average value of the RSSI of the signal in the first frequency band received by the currently selected antenna with an up-to-date value and the received signal The determination criterion of the comparison between the average value of the CINR and the latest value determines whether the currently selected antenna should be switched 'and when the currently selected antenna should be switched, one antenna other than the currently selected antenna is selected. 23. The program of claim 22, wherein: the latest value of the Rssi of the signal in the first frequency band is increased compared to the average value of the RSSI, and the CINR of the first frequency f is the latest Values are flat 23 201014238 When the mean comparison handle field remains unchanged, the line should not be switched. % The decision criterion indicates that the currently selected day a is as in the program of claim 22, and the average value of the face I is compared with the average value of 〇 to increase or keep the latest value and the antenna of (10) should not be _. The reference to the tf indicates that the program of the current selection of the sixth item, such as the item, is executed, and the communication device is executed: = the RSSI of the signal of the Wei-Dian-Sui-wei-wei/band; and the cloth π▼ One The first RSSUb is compared to the program, for each of the plurality of antennas, the average of the fixed period of the sigma of the signal of the second frequency band received by each of the antennas of the number and the RSSI Comparing the latest values, wherein the selection procedure determines the currently selected antenna based on a determination criterion that further compares the average value of the RSSI of the signal of the second frequency band received by the currently selected antenna with the latest value Should it be switched? 27. The program of claim 26, wherein: the latest value of the RSSI of the signal in the first frequency band is increased compared to the average value of rsSI, and the latest value of the CINR of the signal in the first frequency band is When the average value of the CINR is reduced as follows: if the new value of the RSSI of the k-th number of the second frequency band is increased compared with the average value of the RSSI, the determination criterion indicates that the currently selected antenna should be switched; and 24 201014238 When the latest value of the RSSI of the signal is less than the average value of the leg _, the general reference indicates that the antenna of Wei Zhechi is not 2. 8. As in the program of claim 26, and in the case: it frequency 5 The ratio of the average value to the RSSI == is; the latest value of the stupidity of the signal in the XT band and the latest value of the Rssi of the signal of the hidden band and the average value of the leg. The first reference indicates the antenna currently selected. Should be switched; and _ ίί,:, when the latest value of the RSSI of the signal is less than the average value of the leg, the decision criterion indicates that the currently selected antenna is unfavorable, and the program is executed. : #床* 二二i9 Its day from the _ Among the remaining antennas other than the line, the highest average value of the cinr of the signal in the frequency band is a fixed number ί::: ίίίίΐ; 2 when the switch should be switched, the selection program selects the program of the pre-patent money item 29 The selection procedure will be performed by the current box-handling line, which is now the signal of the first frequency band. The average of the legs is compared to the signal line of the first frequency band presented by each of the antennas. If the currently selected antenna exhibits the highest average value of the activity, the switching of the currently selected antenna is aborted. Eight, schema: 25