Wireless communication device and method of prerating the same

Wireless communication device and operation method thereof

The present invention is related to the field of wireless communication. For example, the present invention can be applied to the field of mobile phones.

The technical specifications of each type of wireless communication network are different from each other. This leads to a problem that a wireless communication device designed to be implemented in one type of network is unlikely to be applicable to other types of networks. The solution to the compatibility problem is to provide a standard operation scheme for wireless communication network designers and manufacturers to adopt. For example, there are several communication standards such as GSM, AMPS, CDMAOne and UMTS in the field of mobile phones. In fact, the mobile phone field shows that although the compatibility problems caused by the coexistence of several incompatible standards have been reduced, they have not been completely eliminated. For example, mobile phones designed according to the AMPS standard cannot be used in the GSM network. Implement.

In practice, wireless communication networks cannot have complete coverage, that is, it is difficult or impossible for mobile phone users to connect to their communication networks in some places. As mentioned above, even if another communication network can provide sufficient coverage The location of the mobile phone user and the users device may not be compatible with other communication networks.

The main purpose of the present invention is to improve the chances of connection between mobile phone users and wireless communication networks.

In view of this, the present invention proposes a wireless communication network terminal device, including: a plurality of communication subsystems, each of which is arranged to send and/or receive signals under a different telecommunication standard; A clock signal device; and a scheduling device for transmitting commands to the at least one subsystem for operation, the scheduling device can infer the command timing related to the clock signal. Generally speaking, these commands enable the subsystems to start, modify, or stop executing certain programs.

Therefore, the present invention provides a system that can operate under different communication standards, which can promote the connection between mobile phone users and some wireless communication networks, and improve the chances of successful use of wireless communication devices.

In addition, the present invention facilitates the interaction of a single timing signal in a wireless communication network terminal device under different communication standards, without generating individual timing signals for different standards. Therefore, the wireless communication network terminal device can switch from a network constructed under one communication standard to and operate on a network constructed under another communication standard. The timing required under different communication standards must correspond to individual clocks. When the signal is used, a single timing signal can be used to make the switching process more efficient.

In one embodiment, in order to enable the wireless communication network terminal device to interact with a target unit, the timing determination process of the wireless communication network terminal device is controlled by the corresponding timing signal, including generating an offset to indicate one of the timing signals. The timing offset between one point and the corresponding point of another imaginary timing signal is used as the connection between the terminal device and the target unit.

For example, the wireless communication network terminal device may be a mobile phone, and the target unit interacting with the wireless communication device may be a base station set up in the mobile phone network, and the communication standards adopted by the two subsystems may be UMTS and GSM. .

The embodiment of the present invention is only used as an example, and the detailed description is as follows: Figure 1 shows a mobile phone 10 that can interact with base stations, such as 11 and 13, and these base stations 11 and 13 are located in accordance with UMTS. In the network 12 constructed by the standard and in the network 14 constructed according to the GSM standard. The structure of the mobile phone 10 is not disclosed in detail in FIG. 1, it is only a brief description of the procedures in the mobile phone that contribute to the present invention.

As shown in Figure 1, the mobile phone 10 includes a GSM subsystem 16. When the mobile phone 10 communicates with a GSM network, such as the network 14, the GSM subsystem 16 is used to perform necessary processing operations. . The mobile phone 10 also includes a UMTS subsystem 18. When the mobile phone 10 communicates with a UMTS network, such as the network 12, the UMTS subsystem 18 is used to perform necessary processing operations. The processing subsystems 16 and 18 are respectively configured to generate signals transmitted by the antenna 20 of the mobile phone 10, and the mobile phone 10 can also process the signals received via the antenna 20. The subsystems 16 and 18 use part of the hardware of the mobile phone 10 together, including a clock generator 24.

The time-scheduled tasks executed by the processing subsystems 16 and 18 are finally controlled by a clock signal 23 generated by the clock generator 24. The clock generator 24 includes a quartz oscillator for generating a clock signal 23. The quartz oscillator is arranged by the UMTS subsystem 18 to keep the clock signal 23 at a required frequency to perform UMTS operations. Therefore, when the mobile phone 10 communicates with a UMTS base station, the UMTS subsystem 18 directly uses the clock signal 23 to schedule UMTS operations.

Since the clock signal 23 conforms to the UMTS communication standard, it cannot be directly used for the control of the GSM operation of the mobile phone 10 because the GSM communication standard requires a clock signal of a different frequency. In order to enable GSM to operate at the correct clock, the mobile phone 10 includes a scheduler 22 that can interact with the clock signal 23, and the scheduler 22 uses the clock signal 23 as a reference signal In order to calculate the moment when the GSM subsystem 16 must start or stop certain actions. Based on the calculated event time, the scheduler can send commands to the GSM subsystem 16 so that the GSM work can be executed at the correct time, so the GSM work is not directly controlled by a main clock signal Instead, the GSM subsystem 16 receives commands to perform the required GSM work at the correct time.

The operation of the subsystems 16 and 18 and the scheduler will be described in accordance with Figure 2.

Figure 2 illustrates the clock signal 23 extending from an arbitrary origin t0. Figure 2 illustrates a situation where the mobile phone 10 can obtain signals from four nearby base stations. Two base stations form part of a UMTS network and are marked as UMTS#1 and UMTS#2; the other two base stations are It forms part of a GSM network and is marked as GSMS#1 and GSM#2.

The purpose of this example is to assume that the mobile phone 10 is initially operating in the UMTS communication mode, and it first establishes a connection to UMTS#2. The UMTS subsystem 18 determines the frame structure boundary of the signal from base station UMTS#2 that occurs at time t3. Therefore, the UMTS subsystem 18 will record the offset C to indicate the position of t3 relative to time t0, so that Make the UMTS subsystem 18 have a record of the frame structure of the signal sent by the base station UMTS#2. In the next time, if the mobile phone needs to interact with the base station UMTS#2, by considering the offset C, a suitable UMTS job can be scheduled to start execution at a suitable time. In the same way, the UMTS subsystem 18 can obtain the signal sent from the base station UMTS#1 and determine an offset A to indicate the frame structure limit of the signal sent from the base station UMTS#1 relative to the clock signal T1 position of any origin t0 in 23. Similarly, the GSM subsystem 16 can obtain the signals sent by the base station GSM#1 and the base station GSM#2, and process these signals under the command of the scheduler 22 to determine the offsets B and D to indicate respectively The frame structure of the signal sent by GSM#1 and GSM#2 is relative to the boundary t2 and boundary t4 of the arbitrary origin t0 of the clock signal 23.

When connected to base station UMTS#2, the phone 10 will monitor other base stations located nearby, such as UMTS#1, GSM#1, and GSM#2. Basically, this monitoring is used to determine how to use a communication When connecting to a different base station, can better communication be achieved (that is, with fewer errors).

Figure 3 shows an improved version 10a of the mobile phone in Figure 1. In Figure 3, the clock signal is extracted from the telecommunication standard used by the subsystems 16 and 18, and an improved scheduler 22a uses the clock signal to infer the event time to control the UMTS subsystem 18 and the GSM subsystem 16. The clock signal 23 must have a sufficiently high frequency so that it can accurately determine the time point of the command transmitted to the UMTS and GSM subsystems within the timing error tolerance range of these communication standards. In this example, the clock generator 24 generates a signal with a frequency of 19.2MHz. Since the frequency is 5 times the UMTS chip rate and 86 times the GSM wireless transmission channel bandwidth of 200kHz, it can be The scheduler 22a is used to simplify the calculation of event time.

<p>10. . . mobile phone</p><p>10a. . . Improved version of mobile phone</p><p>11. . . Base station</p><p>12. . . UMTS mobile phone network</p><p>13. . . Base station</p><p>14. . . GSM mobile phone network</p><p>16. . . GSM subsystem</p><p>18. . . UMTS subsystem</p><p>20. . . antenna</p><p>twenty two. . . Scheduler</p><p>22a. . . Improved scheduler</p><p>twenty three. . . Clock signal</p><p>twenty four. . . Clock generator</p>

Figure 1 schematically shows the interaction between a dual-band mobile phone and a GSM network and a UMTS network.

FIG. 2 is a schematic diagram illustrating the sequence of the operation procedure of the mobile phone in FIG. 1. FIG.

Figure 3 schematically shows an improved version of the mobile phone in Figure 1.