TW200924540A - Mobile terminal device and method for roaming by communication environment parameters of a plurality of access points - Google Patents

Abstract

A mobile terminal device includes a surveying module, a roaming policy module, and a roaming deciding module. The surveying module is used for detecting a current communication environment parameter of a plurality of access points, and a roaming frequency parameter and a retransmission rate packet of the mobile terminal device in a prearranged detecting time. The roaming policy module is used for calculating a Radio Quality Index (RQI) via the current communication environment parameter of the plurality of access points, and the roaming frequency parameter and the retransmission rate packet of the mobile terminal device, and adjusting a roaming threshold of a current access point connected. The roaming deciding module is used for determining whether an object access point is content with a roaming condition corresponding to the RQI.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile terminal device, and more particularly to a wireless terminal device for roaming using communication environment parameters of a plurality of base stations and a method for escaping the same. [Prior Art] With the widespread application of base stations, mobile terminal devices can access the Internet by establishing a connection with a wireless local area network base station. Usually, each base station can be connected to a certain number of wireless terminal devices. If the base station's Receive Signal Strength Indication (RSSI) becomes weak or the current network congestion becomes severe, the base will be caused. The connection between the station and the mobile terminal device is interrupted, which interrupts the transmission of data. In order to prevent the transmission of data due to interruptions, mobile terminal equipment usually roams from the current base station to a better target base station than the current base station. In the prior art practice, 'the mobile terminal equipment usually selects the base station with stronger RSSI than the current base station and the network quality is better than the current network as the roaming target. 'This method will lead to other mobile terminal equipment. The communication terminal, the same multiple mobile terminal equipment, also roamed to the target base station at the same time, from 2

The increase in the load of the target base station and the congestion of the network become more T-height' may also cause the mobile terminal to be destroyed and cannot successfully roam to: ^ base station. ""Objectives] In view of this, it is necessary to provide a mobile terminal device for reporting the 200924540 base station access! 1 environmental parameters roam from the current base station to the target base station. In addition, there is a need to provide a method for utilizing the communication environment parameters of a plurality of base stations to drive a mobile terminal from a current base station to a base station. - a kind of mobile terminal device' (4) according to the communication environment parameter of the plurality of base stations roaming from the current base station to the target base station, the mobile terminal device includes a detection module, a roaming policy adjustment module and a roaming decision module. The detecting module is configured to detect the current communication environment parameter of the base station and the roaming frequency parameter and the packet sending failure rate parameter of the mobile terminal device within a predetermined detection time. The roaming policy adjustment module is configured for the current communication environment of the base stations, the roaming frequency parameter of the mobile terminal device, and the packet transmission failure rate parameter, and calculates a radio quality indicator value RQI, and according to the The RQI adjusts the roaming threshold of one of the current base stations. The roaming decision module is configured to receive the current communication environment parameter of the base station and the roaming frequency parameter and the packet transmission failure rate parameter of the mobile terminal device, and receive the RQI sent by the roaming policy adjustment module. And the roaming threshold value after the adjustment, and determining whether there is a target base station that satisfies the roaming condition corresponding to the RQI. A method for roaming by using a communication base parameter of a plurality of base stations for roaming from a current base station to a target base station by a mobile terminal device, wherein the method for roaming by using communication environment parameters of the plurality of base stations includes: Detecting the current communication environment parameters of the base stations, the roaming frequency parameters of the mobile terminal equipment, and the packet transmission failure rate parameters; transmitting the current communication parameters of the base station 200924540 and the frequency of the materials And the packet transmission failure sample-to-diffuse frequency adjustment touches the "roaming mosquito module"; according to the current transit parameter of the base station and the roaming frequency parameter of the riding and the final response, and the packet transmission failure rate parameter calculation material - The power quality indicator value RQI is adjusted according to the RQI value, and the roaming (1) threshold of the current base station is adjusted; receiving the RQI value sent by the roaming policy adjustment module and the roaming threshold value after the adjustment, the broken shirt satisfies the RQI Base station corresponding to the roaming condition of the fairy: when the target of the roaming condition that satisfies the RQI value (4) is satisfied: when the base station is sent, a roaming is sent And the target base station does not travel the execution module, and disconnects the mobile terminal device from the current base station, and establishes a communication connection between the mobile terminal device and the target base station. The terminal device and the method for roaming by using the number of communication ring numbers of the plurality of base stations, so that the mobile terminal device can selectively roam to the target station, and can prevent the same or similar multiple terminal devices from communicating with the mobile terminal device. At the same time, roaming to the target base station, so that the mobile terminal can be injured and roamed to the target base station. [Embodiment] Referring to Fig. 1, there is shown an application environment diagram of a mobile terminal 20 in an embodiment of the present invention. In the present embodiment, the mobile terminal device (the access point, AP) is connected in communication, and around the action mountain 20 is surrounded by a second base station 12, ..., an Nth base & The mobile terminal device and the base station may be devices that comply with the WiFi standard of the Institute of Electrical and Electronics Engineers (IEEE) 802.lib. However, the above mobile terminal device and the base station may also be devices complying with other standards, such as Global System for Mobile Communications (GSM), Code Division Multiple Access (CDMA), Broadband CDMA (WCDMA), Universal Mobile Telecommunications System (i UMTS), and High Speed Downlink Packet Access (HSDPA). The mobile terminal device may be a dual mode or multi-mode mobile phone, a Personal Digital Assistant (PDA), a smart phone or a computer device that supports various communication specifications. In the present embodiment, when the communication environment in which the first base station 11 is located is gradually getting worse, it is insufficient to keep the mobile terminal device 20 in a WiFi network (not shown), that is, the mobile terminal device 20 The I communication connection with the first base station 11 is interrupted. At this time, the mobile terminal device 20 needs to roam from the first base station 11 to one of the second base station 12, ..., or the Nth base station 1N. Stay on the WiFi network all the time. Fig. 2 is a block diagram showing a mobile terminal device 20 in an embodiment of the present invention. In the present embodiment, the base station 10 includes a first base station U, a second base station 12, a second base station 1 'the mobile terminal device 20 is communicatively connected to the first base station 11, and the mobile terminal device 20 includes A detection module 200, a > crying policy adjustment module 210, a roaming decision module 220, and a roaming execution module 200924540 group 230. Each module in the mobile terminal device 20 can be constituted by a computer program or a circuit. The detecting module 200 is configured to detect a communication environment condition of the environment where the mobile terminal device is located within a predetermined detection time, where the communication environment condition includes the current communication environment parameter of the base station 10 and the roaming frequency parameter of the mobile terminal device 20 and the packet transmission failure. At least one of the parameters of the rate parameter. The current communication environment parameters of the base station include, in addition to the current communication environment parameters of the current base station and the target base station of the mobile terminal device, and other communication environment parameters of the base station that can be obtained. In the present embodiment, the current communication environment parameters of the base station 1 include the quality of service basic service set (QBSS) of the base station 10 and the received signal strength indication of the base station 10 (Received Signal Strength Indication). , RSSI) rate of change. The QBSS of the base station 10 identifies the current channel utilization rate of each base station and the load amount of each base station. The larger the value of the QBSS, the smaller the utilization rate of the current 'master base station's channels. And the greater the load of each base station, that is, the worse the service quality of the base station 10. The RSSI variation is the base station.10 The amount of change in rssi during the above detection time, which identifies the operational stability of each base station. The larger the RSSI value, the better the stability of each base station. That is, the better the service quality of each base station. The roaming frequency detection module 2 of the mobile terminal device 20 detects the number of times the mobile terminal device 20 roams during a system operation time within a predetermined detection time, for example, the system operation time is 2 seconds, and the mobile terminal device 2 漫游 roams The frequency identifies the stability of the communication connection between the mobile terminal device 20 11 200924540 and the base station 10. The higher the roaming frequency of the mobile terminal device 20, the lower the communication connection between the mobile terminal device 20 and the base station 10. The worse. The packet transmission failure rate of the mobile terminal device 20 indicates the number of times the packet transmission failure has failed during the voice job time, indicating the communication connection stability between the mobile terminal device 20 and the base station to which the communication connection is made. The higher the packet transmission failure rate of the mobile terminal device 20, the more stable the communication connection stability of the mobile terminal device 20 and the base station (for example, the first base station 11) corresponding to the communication connection, the voice operation time is, for example, 2 seconds. The above detection time, system operation time, and voice operation time can be set to the same value or different values. In this embodiment, the detection module 200 is further connected to the roaming policy adjustment module 210 and the roaming decision module 220 for transmitting the current communication environment parameters of the base station 1 and the roaming frequency parameters and packets of the mobile terminal device 20. The failure rate parameter is sent to the roaming policy adjustment module 210 and the roaming decision module 220. In this embodiment, the roaming policy adjustment module 210 is connected to the detection module 200 1 for receiving the current communication environment parameters of the base station 10 and the roaming frequency parameters of the mobile terminal device 20 and the packet transmission. The failure rate parameter is calculated, and a Radio Quality Index (RQI) value is calculated, and a roaming threshold (Roaming Threshold) of the base station that is in communication with the mobile terminal device 20 is adjusted according to the RQI value. In this embodiment, the roaming policy adjustment module 210 obtains the RQI value by an operation formula. In the present embodiment, the RQI value is calculated as: (1) RQI=Max RQI-iRQI » 12 200924540 where the RQI maximum value is a preset value, and iRQI=(((Avg_QBSS + Max-QBSS) * Max_RQI ) * 0.5) + (((Roam_Freq + Max—Freq) * Max_RQI ) * 0.2) + (((Retx_Rate 4· Max_Retx_Rate) * Max_RQI ) * 0.2) + (((Avg_RSSI_Variance + Max_RSSI_Variance) * Max_RQI ) * 0.1). (2) Among them,

Max_RQI : RQI maximum;

Max_QBSS : QBSS maximum;

Avg—QBSS: QBSS average;

Max_Freq : the maximum number of roaming;

Roam_Freq: the number of current roaming of the mobile terminal device 20; Max_Retx_Rate: the maximum packet transmission failure rate;

Retx_Rate: current packet transmission failure rate of the mobile terminal device 20; Max_RSSI__Variance: maximum RSSI variation of the base station 10; Avg_RSSI_Variance: average RSSI variation of the base station 10. In the present embodiment, the value of Max_RQI is preset to 1〇〇, the value of Max_QBSS is preset to 100, and Avg_QBSS is the average value of QBSS of all base stations in the base station 10 transmitted by the detection module 200. Max_Freq is the maximum number of times that the mobile terminal device 20 roams during the system operation time. For example, the maximum number of roaming times is 15 times. The Roam_Freq is the detection module 200 detecting the actual current roaming of the mobile terminal device 20 during the system working time within the predetermined detection time. The number of times 13 200924540. The Max_Retx_Rate mobile terminal device 20 encapsulates the voice working time. • The maximum probability of the transmission failure. The Retx_Rate is the detection module 2 检测 detecting the actual current seal of the mobile terminal device 20 during the voice working time within the predetermined detection time.

The number of times the packet failed to be delivered. Max_RSSI_Variance is the maximum value of the rate of change of the RSSI of the base station 10 during the detection time. For example, the preset is 40.

The Avg- RSSI_Variance is an average value of the RSSI variation of the base station 10 detected by the detection module 200 within a predetermined detection time. In the present embodiment, different RQI values identify different communication environment states. The state of the communication environment includes a normal state, a high traffic state, and an interference state (or a severe interference state). If the RQI value is greater than or equal to, the current communication base state of the base station 10 is in a normal state, and the communication environment quality is normal; if the RQI value is greater than or equal to 4〇 and less than 70, the current base station 10 communication is identified. The environment state is in a high traffic state, and the communication environment quality is relatively poor. If the RQI value is less than 4〇, the current communication base state of the base station 1 is in an interference state, and the communication environment quality is worse. It should be noted that the R QI value can be used to distinguish more or less communication environment quality states, and the threshold values of various communication environment quality states are not limited to 40 and 70, but can be set to different values. In the present embodiment, the roaming policy adjustment module 21 adjusts the roaming threshold of the first base station 11 communicatively connected to the mobile terminal device 2 according to the RQI value. In the present embodiment, if the RQI value is less than 7〇, the roaming policy adjustment module 210 increases the roaming threshold 14 200924540 of the first base station 11 that is in communication with the mobile terminal device 20 . If the RQI value is smaller, the roaming threshold will be adjusted higher. In the present embodiment, the roaming threshold value includes the difference between the RSSI of the target base station and the first base station 1] L that is currently in communication with the mobile terminal device 20 after the mobile terminal device 10 roams, and the difference between the QBSS. In this embodiment, if the RQI value is greater than or equal to 70, the difference in RSSI in the roaming threshold at this time is 20, and the difference in QBSS is 15. If the RQI value is greater than or equal to 40 and less than 70, the difference in RSSI in the salvage threshold at this time is 30, and the difference in QBSS is 25. If the RQI value is less than 40', the difference in rSsi in the roaming threshold at this time is 35, and the difference in QBSS is 35. In this embodiment, the roaming policy adjustment module 210 is also in communication with the roaming decision module 220 for transmitting the RQI value and the roaming threshold after the adjustment. In this embodiment, the roaming decision module 220 is connected to the detection module 200 and the roaming policy adjustment module 210 for receiving the current communication environment parameters of the base station 10 and the mobile terminal device 2 transmitted by the detection module 2 〇 roaming frequency i parameter and packet transmission failure rate parameter, and receiving the RQI value sent by the roaming policy adjustment module 21 and the roaming threshold value after adjustment, and determining whether there is a target that satisfies the roaming condition corresponding to the RQI value Base station. In this embodiment, different RQI values correspond to different roaming conditions. If the RQI value is greater than or equal to 70, that is, the communication environment state of the base station 1〇 is in a normal state, then the corresponding roaming condition is the RSSI and qBss of the target base station and the RSSI of the first base station 1当前 currently connected by the communication. The difference between the difference and the qBSS is higher than the difference between the RSSI and the difference of the QBSS in the roaming threshold at this time. 15 200924540 The right RQI value is greater than or equal to 40, and less than 70, that is, the current base station 1〇 communication environment state is in high traffic state, then its corresponding roaming condition is (1), target base station RSSI and QBSS The difference between the RSSI of the first base station 11 and the current communication connection is higher than the difference between the RSSI and the difference of the QBSS in the roaming threshold at this time; (2) the target base station and the action The terminal device 20 needs to be in a different channel to communicate with the currently connected first base station n; (3) the mobile terminal device 2 needs to delay roaming to the target base station. The length of delay before the mobile terminal device 20 roams each time is determined in a random manner. If the RQI value is less than 40, the communication environment status of the base station 1〇 is in a disturbance state, then the corresponding roaming condition is divided into two cases. The first type is if the mobile terminal device 20 is in or wants to call, the corresponding The roaming condition is that the RSSI of the target base station needs to be higher than the RSSI of the first base station u of the current communication connection, and the QBSS of the target base station needs to be connected to the base station u of the current communication station and the QBSS of the non-target base station. The second is that when the mobile terminal device 2 is not in the call, the corresponding roaming condition is (1), the RSSI of the target base station, and the difference between the RSSS of the QBSS and the Rssi of the first base station n that is connected to the network. The difference between the value and the QBSS is higher than the difference between the #尺2 and the QBSS in the roaming threshold at this time' (2), and the QBSS of the target base station needs to be QBSS of the first base station 11 connected to the current communication. And the non-target base station has a lower QBSS. In this embodiment, the roaming decision module 220 is further connected to the roaming execution module 230, and is further configured to send a roaming execution command and the target when determining that there is a target base station that satisfies the roaming condition corresponding to the RQi value. Base station 16 200924540 • RSSI to roaming execution module 23〇, informing roaming execution module 230 to establish a connection with the target base-ground station. In the present embodiment, the roaming decision module 220 is further configured to perform no action if it is determined that the target base station that does not satisfy the roaming condition corresponding to the RQI value is not satisfied. In the present embodiment, the roaming execution module 230 is in communication with the roaming decision module 220 and the base station 10, and is configured to receive the roaming execution command sent by the roaming decision module 22 and the RSSI of the target base station, and disconnect the mobile terminal. The device 20 is in communication with the first base station 11 and establishes a communication connection between the mobile terminal device 20 and the target base station. FIG. 3 is a flow chart showing a method for roaming a mobile terminal using a communication environment parameter of a plurality of base stations according to an embodiment of the present invention. In the present embodiment, the mobile terminal device 20 is in communication with a first base station 11 (Access Point, AP), and is surrounded by the mobile terminal device 2, a second base station 12, ..., an Nth base station. 1N. For example, the mobile terminal device and the base station described above may be devices conforming to the WiFi standard of the Institute of Electrical and Electronics Engineers > IEEE 802.11b. However, the above mobile terminal equipment and base station may also be devices complying with other standards, such as Global System for Mobile Communications (GSM), Code Division Multiple Access (CDMA), and broadband. CDMA (Wideband CDMA, WCDMA for short), Global Mobile Phone System 17 200924540 (Universal Mobile Telecommunications System, UMTS for short), High Speed Downlink Packet Access (HSDPA). The mobile terminal device may be a dual-mode or multi-mode mobile phone supporting a plurality of communication specifications, a Personal Digital Assistant (PDA), a smart phone, or a computer device. In the present embodiment, when the communication environment in which the first base station 11 is located is gradually degraded, it is not enough for the mobile terminal device 20 to remain in a WiFi network (not taken out), that is, the mobile terminal device 20 The connection with the first base station 11 is interrupted. At this time, the mobile terminal device 20 needs to pass through from the first base station 11 to one of the second base station 12, ..., or the Nth base station 1N. In order to remain in the WiFi network. In step S300, the detecting module 200 detects the current communication environment parameter of the base station 10 and the roaming frequency parameter and the packet transmission failure rate parameter of the mobile terminal device 20 within a predetermined detection time. In the present embodiment, the base station

The other communication environment parameters include the QBSS of the base station 10 and the RSSI variation of the base station 10. The QBSS of base station 10 identifies the current utilization of all channels and the load of each base station. The RSSI variation is the amount of change in the base station 10 during the detection time' to identify the operational stability of each base station. The mobile terminal device detection module 2 detects the number of times the mobile terminal device roams during the operation time of the system within a predetermined detection time. The system operation time is 2 seconds, and the terminal device 20 is subscribed. The roaming frequency identifies the stability of the communication connection between the mobile terminal device 20 and the base station 18 200924540 .10, and the higher the roaming frequency of the mobile terminal device 20, 'is the communication connection between the mobile terminal device 20 and the base station 10 is defined. The degree is worse. The packet transmission failure rate of the mobile terminal device 20 is the number of times the packet transmission failure fails during the voice operation time, and identifies the communication connection stability between the mobile terminal device 20 and the base station to which the corresponding communication connection is connected, that is, the first base station 11, action The higher the packet transmission failure rate of the terminal device 20, the worse the stability of the on-machine connection stability of the mobile terminal device 20 and the first base station 11, and the voice operation time is 2 seconds. In step S302, the detection module 200 transmits the current communication environment parameter of the base station 1 and the roaming frequency parameter of the mobile terminal device 20 and the packet transmission failure rate parameter to the roaming policy adjustment module and the roaming decision module 220. In step S304, the roaming policy adjustment module 210 calculates the RQI value according to the current communication environment parameter of the base station 1 and the roaming frequency parameter of the mobile terminal device 20 and the packet transmission failure rate parameter. In the present embodiment, the roaming policy adjusts the entire module 210 to obtain the RQI value by the arithmetic formula (1) (2). In step S306, the roaming policy adjustment module 210 adjusts the roaming threshold (Roaming Threshold) of the first base station that is in communication with the mobile terminal device 20 according to the RQI value. In the present embodiment, if the RQI value is less than 7〇, the roaming policy adjustment module 210 increases the roaming threshold of the first base station 11 that is in communication with the mobile terminal device 2〇. If the RQI value is smaller, the roaming threshold will be adjusted. In this embodiment, the roaming threshold includes the target base station after the mobile terminal device 10 roams and communicates with the mobile terminal device 20 19 200924540 • The difference between the RSSI of the connected first base station 11 and the difference of the QBSS. In the present embodiment, if the RQI value is greater than or equal to 70 ′, the difference in RSSI of the roaming threshold value at this time is 20, and the difference of QBSS is 15. If the RQI value is greater than or equal to 40' and less than 70, the difference in RSSI in the roaming threshold at this time is 30, and the difference in QBSS is 25. If the RQI value is less than 40, the difference in RSSI in the roaming threshold at this time is 35, and the difference in QBSS is 35. In step S308, the roaming decision module 220 receives the RQI value sent by the roaming policy adjustment module 210 and the roaming threshold value after the adjustment. In step S310, the roaming decision module 220 determines whether there is a target base station that satisfies the roaming condition corresponding to the RQI value. In the present embodiment, 'different RQI values correspond to different roaming conditions. If the RQI value is greater than or equal to 70, that is, the communication environment state of the base station 1〇 is in a normal state, the roaming condition corresponding to the RQI value is the Rssi& QBSS of the target base station and the first base station connected to the current communication. The difference between RSS and [OB% " is higher than the difference between RSSI and qBss in the roaming threshold at this time. The right RQI value is greater than or equal to 40, and is less than 70, that is, the current base station 1〇 communication environment state is in the high traffic state', then the corresponding roaming condition is (1), the target base station's RSSU QBSS and the current communication connection RSS of a base station 11: [The difference and QBSS & difference are higher than the difference between the hall in the roaming (10) value and the difference of QBSS at this time; (2), the target base station and the mobile terminal equipment The first base station u of the communication connection needs to be in a different channel; 20 200924540 • (3) The mobile terminal s needs to delay roaming to the target base station. The mobile terminal. The device 20, according to the judgment of the roaming decision module, performs the roaming when the roaming is performed, and the time length of the delay is determined in a random manner. The delay time can be calculated from the time the roaming execution command is received. If the RQI value is less than 40, and the communication environment state of the base station 1 is in an interference state, the corresponding no-game condition is divided into two cases. The first one is if the mobile terminal device 20 is in or wants to call, the corresponding The roaming condition is that the RSSI of the target base station needs to be higher than the RSSI of the first base station to which the communication is connected, and the QBSS of the target base station needs to be more than the qbss of the first base station n and the QBSS of the non-target base station of the current communication connection. Low; the second is that the mobile terminal device 2 is not in the call, the corresponding roaming condition is (1), the target base station chats] and the first base station of the QBSS and the current communication connection, the difference between @Rssi and the QBSS The difference is higher than the difference between rssi in the roaming threshold at this time and

The difference between Qbss' (7) and the QBSS of the target base station need to be lower than the Qbss of the first base station 11 and the QBSS of the non-target base station. In the present embodiment, when the roaming decision module 22 determines that there is a target base station that satisfies the roaming condition corresponding to the illuminance, the process proceeds to step s3u, and the roaming determination module 220 transmits a roaming execution command and the target base station. To the roaming execution module 230. In step S3U, the roaming execution module 2s disconnects the communication terminal device from the first base station 11 and establishes a communication connection between the mobile terminal device 2(s) and the target base station. 21 200924540 t • In the present embodiment, if the roaming decision module 220 determines that it is not satisfied,

When the value corresponds to the target base station of the roaming condition, the operation ends. The mobile terminal device 20 described in A' and the method for roaming by using the communication door-to-door parameters of the plurality of base stations enable the mobile terminal 2G to selectively evade the target base station and prevent the mobile terminal device 20 from being The communication situation is the same or similar. ^ The multi-active mobile terminal equipment roams to the target base station at the same time, so that the mobile terminal can successfully roam to the target base station. Sigh. According to the above description, the present invention complies with the requirements of the invention patent, and the person who has filed the patent application according to the law is only the preferred person of the present invention, and is invented in the case of the invention. All of the following claims should be included in the following claims: equivalent modifications or variations, and the following is a schematic diagram of an embodiment of the present invention. Application Ring of Mobile Terminal Equipment in Figure 2 is an embodiment of the present invention. The module of the mobile terminal device in the 々 type is shown in Fig. 3 of the present invention. The environment of the track of the platform is recorded in a complex basis. [The main component symbol description] Wang 10 11 Base station first base The first base station 12 22 200924540 The Nth base station 1N wireless terminal device 20 detection phase: group 200 roaming policy adjustment module 210 roaming decision module 220 roaming execution module 230 23

Claims (1)

200924540 X. Patent application scope: For communication environment parameters based on complex base stations • To – target base station, the mobile terminal equipment package 1. A mobile terminal device for roaming from a current base station to: The board group 'is used to detect the Tianyue 通讯 communication %& parameter of the base station and the roaming frequency parameter and the packet transmission failure rate parameter of the mobile terminal device within a predetermined detection time; a roaming policy adjustment module, for Receiving the current communication ring i brother parameter of the base station and the roaming frequency parameter of the mobile terminal device and the packet transmission failure rate parameter 'and calculating one a roaming decision for receiving the current communication environment parameter of the base station and the roaming frequency parameter and the packet transmission failure rate parameter of the mobile terminal device, and receiving the roaming policy adjustment module RQI and the roaming threshold after the adjustment, and determining whether there is a target base station that satisfies the roaming condition corresponding to the RQI. 2. The mobile terminal device according to claim 1, wherein the current communication environment parameters of the base stations include a service quality QBSS of a basic service unit of the base stations and a received signal strength of the base stations. Indicating the RSSI change, the QBSS of the base stations identifies the current channel utilization rate of each base station and the load amount of each base station. The RSSI change amount is the amount of change of the base stations during the detection time. Identify the operational stability of each base 24 200924540 platform. 3. The mobile terminal device of claim 2, wherein the mobile terminal device has no frequency of traveling, and the detecting module detects the number of times the mobile terminal device roams in a system operating time within a predetermined detection time, The roaming frequency of the mobile terminal device identifies the stability of the communication connection between the mobile terminal device and the current base station, and the higher the roaming frequency of the mobile terminal device identifies the communication between the mobile terminal device and the current base station. 'The worse the connection degree is. 4. The mobile terminal device according to claim 3, wherein the packet transmission failure rate of the mobile terminal device is a number of times the packet transmission fails during the voice operation time, and the mobile terminal device and the corresponding communication connection are identified. The stability of the communication connection of the current base station, the higher the failure rate of the packet transmission of the mobile terminal device, the worse the communication connection degree between the mobile terminal device and the current base station is marked. ί 5. The mobile terminal device of claim 4, wherein the RQI value is calculated as: RQI=RQI maximum value -iRQI, wherein the RQI maximum value is a preset value, and iRQI=((( QBSS average + QBSS maximum) * RQI maximum) * 0.5) + (((current roaming number + maximum number of roaming times) * RQI max) * 0.2) + (((packet transmission failure rate + packet transmission failure The maximum value of the rate * * RQI maximum) * 0.2) + (((the average of the RSSI change amount + the maximum value of the RSSI change) * RQI 25 200924540 A maximum) * 0.1). 6. The mobile terminal device according to claim 5, wherein the RQI* maximum value is 100, the QBSS maximum value is 100, and the maximum number of roaming times is that the mobile terminal device only works during the system operating time. The maximum number of roaming times, the current roaming number is that the detecting module detects the number of times the mobile terminal device currently roams during the working time of the system within the predetermined detecting time, and the maximum value of the packet transmission failure rate is the mobile terminal device. The maximum probability of failure of the packet transmission during the voice operation time, the packet transmission failure rate is that the detection module detects, during the predetermined detection time, the probability that the mobile terminal device fails to transmit the packet during the voice operation time, the RS SI The average value of the variation is that the detection module detects an average value of the RSSI variation of the current base station within the predetermined detection time. 7. The mobile terminal device of claim 6, wherein the maximum number of roaming times is 15 times. The mobile terminal device of claim 7, wherein the different RQI values identify different communication environment states, and the communication environment states include a normal state, a high traffic state, and an interference state. 9. The mobile terminal device according to claim 8, wherein if the RQI value is greater than or equal to 70, the communication environment state indicating the base stations is in the normal state, and the communication environment quality is normal; if the RQI If the value is greater than or equal to 40 and less than 70, the communication environment status of the base stations is in the high traffic state, and the communication environment quality is relatively poor; if the 26 200924540 RQI value is less than 40', the base stations are identified. The communication environment state is in this 'interference state' and its communication environment quality is very poor. The mobile terminal device of claim 1, wherein the roaming threshold value includes a difference between a target base station of the mobile terminal device and an RSSI of the current base station and a difference of QBSS. 11. The mobile terminal device of claim 10, wherein if the RQI value indicates that the communication environment status of the base stations is in a normal state, the roaming condition corresponding to the RQI value is the RSSI and QBSS of the target base station. The difference between the RSSI of the current base station and the QBSS is higher than the difference between the RSSI in the roaming threshold and the difference of the QBSS. 12. The mobile terminal device according to claim 10, wherein if the RQI value indicates that the communication environment state of the dedicated base station is in a high traffic state, the roaming condition corresponding to the RQI value is the target base station. The difference between the RSSI and QBSS and the RSSI of the current base station and the difference i of the QBSS are higher than the difference between the RSSI in the roaming threshold and the difference between the QBSS, and the target base station and the two base stations need to be different. In the channel, and the mobile terminal device needs to delay roaming to the target base station. 13. The mobile terminal device according to claim 1, wherein if the RQI value indicates that the communication environment status of the base stations is in an interference state, if the mobile terminal device is in or wants to call, corresponding The RQI value has no hop condition that the RSSI of the target base station needs to be higher than the RSsi of the current base station, and the QBSS of the target base station needs to be lower than the QBSS of the current base station 27 200924540 QBSS and the non-target base station. . 14. The mobile terminal device according to claim 10, wherein if the RQI value indicates that the communication environment state of the base stations is in an interference state, if the mobile terminal device is not in a call, the RQI value is corresponding. The roaming condition is the RSSI and QBSS of the target base station and the current base station The difference between RSSI and QBSS is higher than the difference between rssi in the roaming threshold and the difference between QBSS, and the QBSs of the target base station need to be more than the QBSS of the current base station and the QBSS of the non-target base station. low. The mobile terminal device of claim 2, further comprising a roaming execution module, configured to: when the roaming determination module determines that the target base station meets the roaming condition corresponding to the RQI value, Receiving the roaming execution core-sending roaming execution command and the rssi of the target base, disconnecting the mobile terminal device from the current base station, and establishing the mobile terminal to read the communication connection with the target base station. a method of roaming using communication environment parameters of a plurality of base stations, performing, and: slamming the terminal device to cause the mobile terminal device to travel from a private base station with a current base station, the mobile terminal device including a detection Module, 么/又游 policy § week module, ~ roaming decision module and - roaming execution mode The method of roaming using the communication environment parameters of the plurality of base stations includes: j loose test group at a predetermined scheduled detection time Investigate the data of the Tianyue j communication of the base stations and the roaming frequency parameters of the mobile terminal equipment and the parameters of the 200924540 packet transmission failure rate. The Laiyou policy difficult module is based on the #前通信 environment of the base stations. The radio frequency indication value RQI is calculated by the parameter of the number of the number of the data and the packet transmission failure rate of the new secret (4); the roaming policy adjustment module adjusts the roaming threshold of the current base station according to the Rqi value; The roaming decision module determines whether there is a target base station that satisfies the roaming condition corresponding to the RQI value; and when determining that there is a target base that satisfies the roaming condition corresponding to the RQI value At the time of the platform, the no-execution module disconnects the communication terminal device from the current base station, and establishes a connection between the mobile terminal device and the target base station. 17. The method of roaming using communication environment parameters of a plurality of base stations as described in claim 16 wherein the current communication environment parameters of the base stations include a service quality qbss of a basic service unit of the 4 base stations and The received signal strength of the base stations indicates the RSSI change, and the QBSS of the base stations identifies the current channel utilization rate of each base station and the load amount of each base station, and the RSSI change amount is the base stations. The amount of change during the detection time identifies the operational stability of each base station. 18. The method of roaming by using a communication environment parameter of a plurality of base stations as described in claim 16 of the claim, wherein the roaming frequency of the mobile terminal device is that the detection module detects the mobile terminal within a predetermined predetermined detection time. 29 200924540 _ The number of times of roaming in a system operating time' The mobile terminal frequency of the mobile terminal device identifies the stability of the communication between the mobile terminal device and the current base station, and the roaming of the mobile terminal device The higher the frequency, the worse the communication connection degree between the mobile terminal device and the current base station is identified. 19. The method for roaming by using a communication base parameter of a plurality of base stations as described in claim 18, wherein the packet transmission failure rate of the mobile terminal device is a number of failed packet transmissions during a voice operation time, and is identified ^ The stability of the communication connection between the mobile terminal device and the current base station corresponding to the communication connection, and the higher the packet transmission failure rate of the mobile terminal device, the communication connection between the mobile terminal device and the current base station is determined The worse the degree. 20. The method of roaming using a communication environment parameter of a plurality of base stations as described in claim 16 wherein the RQI value is calculated as: RQI=RQI maximum value -iRQI, 'where RQI maximum value is one Set value, and iRQI=(((QBSS average + QBSS maximum)* RQI maximum)* 0.5) + (((current roaming times + maximum number of roaming times)* RQI max)* 0.2) + (( (packet transmission failure rate + packet transmission failure rate maximum value) *RQI maximum value) * 〇.2) + (((the average value of RSSI change amount + the maximum value of RSSI change amount) * rQi maximum value) *0.1) . 21. The method for roaming by using a communication base parameter of a plurality of base stations as described in claim 20, wherein the maximum RQI is 100, the maximum value of the QBSS 30 200924540 is 100, and the maximum number of roaming times is the action. The maximum number of times that the terminal device can only roam during the working time of the system. The current number of roaming times is that the detecting module detects the number of times the mobile terminal device currently roams during the working time of the system within the predetermined detecting time. The maximum value of the rate is the maximum probability that the mobile terminal device fails to transmit the packet during the voice working time, and the packet transmission failure rate is that the detecting module detects the mobile terminal device in the voice working time within the predetermined detection time. The number of times the packet transmission fails, and the average value of the RSSI change amount is an average value of the RSSI change amount of the current base station detected by the detection module within the predetermined detection time. 22. The method of roaming using the communication environment parameters of a plurality of base stations as described in claim 21, wherein the maximum number of roaming is 15 times. 23. The method of roaming using communication environment parameters of a plurality of base stations as described in claim 16 wherein the different RQI values identify different communication environment states, and the communication environment state includes a normal state and a high communication. Quantity status and an interference status. 24. The method of roaming by using a communication environment parameter of a plurality of base stations as described in claim 23, wherein if the RQI value is greater than or equal to 7〇, the communication environment status identifying the base stations is in the normal state. The communication environment quality is normal. If the RQI value is greater than or equal to 4〇 and less than 7〇, the communication environment status indicating the base stations is in the high traffic state, and the communication environment quality is relatively poor, if the RQ! If the value is less than 4〇, then the standard 31 200924540 knows that the communication environment status of the base stations is in the interference state, and the quality of the communication ring is very poor. 25. The method for roaming by using a communication base parameter of a plurality of base stations as described in claim 16, wherein the roaming threshold includes an RSSI of the target base station and the current base station after the mobile terminal device roams The difference between the difference and the QBSS. 26. The method for roaming using a plurality of base station communication loops as described in claim 25, wherein if the RQI indicates that the communication environment status of the base stations is in a normal state, the RQI value is corresponding. The roaming condition is that the RSSI of the target base station and the difference between the RSSS of the QBSS and the current base station and the QBSS are higher than the difference between the RSSI in the roaming threshold and the difference of the QBSS. 27. The method of roaming using communication environment parameters of a plurality of base stations as described in claim 25, wherein if the RQI value indicates that the state of the communication environment of the base stations is in a high traffic state, then the RQ is corresponding. The roaming condition of the value is that the difference between the RSSI and QBSS of the target base station and the RSSI of the current base station and the difference between the QBSS are higher than the difference between the rssi in the roaming threshold and the difference between the QBSS and the target The base station and the current base station need to be in different channels' and the mobile terminal device needs to delay roaming to the target base station. 28. The method for roaming using communication environment parameters of a plurality of base stations as described in claim 25, wherein if the RQI value indicates that the base station's 32 200924540 communication environment is secretly interfered with (4), if the mobile terminal When the device is in or-telephone, its roaming condition corresponding to the RQI value is that the RSSI of the target base station needs to be higher than the RSSI of the current base station, and the QBSS of the target base station needs to be more than the QBSS of the current base station. The target base station has a lower QBSS. 29. For example, please refer to the method of roaming the communication environment parameters of the material number of the material mentioned in the second paragraph. 'If the RQI value indicates that the communication environment status of the base stations is in the interference state', the mobile terminal device 2〇 When not in the call, the roaming condition corresponding to the RQI value is the difference between the target base station's suspension and the difference between the QBSS and the current base station's coffee and the difference between (10)$ and the roaming limit value (four) RSSI. And the difference between QBSS, and the QBSS of the target base station needs to be lower than the QBSS of the current base station and the QBSS of the non-target base station. 30. The mobile terminal device 'is used to track the number of base stations to roam from the current base station to a target base station, and the mobile terminal device includes a detection module for determining the detection time Detecting the communication environment condition of the mobile terminal device, and the environment status of the towel rail includes at least one of the parameter of the base station platform, the (four) final material system-difficulty number of packets, and the packet failure rate parameter; a roaming policy adjustment mode Group, for the parameters of the environment and the yarn end material ^ 4 (four) 4 # front communication ring, the roaming frequency parameter of the known and injured and the packet transmission loss 33 200924540 failure rate parameter, and calculate a radio quality indicator value RQI, and according to ' The RQI adjusts the roaming threshold of the current base station; and * a roaming determining module, configured to receive the current communication environment parameter of the base station sent by the detecting module, and the roaming frequency parameter of the mobile terminal device and the packet sending failure Rate parameter, and receive the RQI sent by the roaming policy adjustment module and the roaming threshold value after the adjustment, and determine whether there is a corresponding corresponding to the RQI Target base station conditions. The mobile terminal device of claim 30, wherein the mobile terminal device delays execution of the roaming when performing roaming according to the judgment of the roaming decision module, and the length of the delay is Determined by random methods. 34