TWI488527B - Communication method utilized in time division multiple access system, related mobile device and base station - Google Patents

Communication method utilized in time division multiple access system, related mobile device and base station Download PDF

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Publication number
TWI488527B
TWI488527B TW099114347A TW99114347A TWI488527B TW I488527 B TWI488527 B TW I488527B TW 099114347 A TW099114347 A TW 099114347A TW 99114347 A TW99114347 A TW 99114347A TW I488527 B TWI488527 B TW I488527B
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Taiwan
Prior art keywords
mobile device
base station
time slot
access system
information signal
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TW099114347A
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Chinese (zh)
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TW201141292A (en
Inventor
Lee Yuang Huang
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Zyxel Communications Corp
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Description

Communication method and related mobile device and base station using time division multiplex access system

The invention relates to a communication mechanism of a time-division multiplex access system, in particular to a mobile device and a base station used in a time-sharing multiplex access system.

In general, the existing Time Division Multiple Access (TDMA) system is based on point-to-point communication, if it is to point to multi-point. The purpose of group communication (such as group voice communication) is that it is necessary to use a multiple number of time slots (Time Slot) and waste several times the bandwidth. The overall system will not be effectively upgraded because more time slots are occupied, and because adding a group of communication members requires an additional number of time slots, it is impossible to allow more group communication members to participate. In terms of group communication, the existing time-sharing multiplex access system does not meet the current needs.

Therefore, one of the objectives of the present invention is to provide a mobile device and a base station for use in a time-sharing multiplex access system, which can effectively achieve group communication without occupying excessive time slots in a time-division multiplex access system. The effect is in line with current needs.

In accordance with an embodiment of the present invention, a communication method using a time division multiplex access system is disclosed. The communication method includes: detecting a plurality of time slots specified by a base station of the time division multiplex access system to determine whether the time division multiplex access system has a time slot corresponding to a common wave communication; The time division multiplex access system has the time slot, and a first mobile device broadcasts an information signal via the time slot.

According to an embodiment of the present invention, a communication method using a time division multiplex access system is disclosed, wherein a first mobile device and a second mobile device are located within a signal coverage of a base station. The communication method includes: detecting a plurality of time slots specified by the base station to determine whether the time division multiplex access system has at least one time slot corresponding to a common wave communication; receiving the first mobile device by using the base station And transmitting, by the base station, the information signal to the second mobile device via the at least one time slot.

In accordance with an embodiment of the present invention, a mobile device using a time division multiplex access system is disclosed. The mobile device includes a control unit and a transmission unit. The control unit is configured to detect a plurality of time slots specified by the base station of the time division multiplex access system to determine whether the time division multiplex access system has Corresponding to a time slot of a common wave communication, the transmission unit is coupled to the control unit and configured to broadcast an information signal through the time slot when the time division multiplex access system has the time slot.

In accordance with an embodiment of the present invention, a base station for use in a time division multiplex access system is disclosed in which a first mobile device and a second mobile device are located within the signal coverage of the base station. The base station includes a control circuit, a receiving circuit and a transmission circuit, wherein the control circuit is configured to detect a plurality of time slots specified by the time-multiplexed access system to determine whether the time-multiplexed access system has Corresponding to at least one time slot of the common wave communication, the receiving circuit is coupled to the control circuit and configured to receive, according to the result of the control circuit, an information signal broadcast by the first mobile device via the at least one time slot, and the transmission circuit is coupled to the The control circuit is configured to broadcast the information signal to the second mobile device via the at least one time slot according to the result of the control circuit.

The main advantage of the embodiment of the present invention is that the limited bandwidth can provide a service for enabling multiple users to perform instant voice communication, which is more suitable for the user than the prior art, especially for a temporary deployment. In terms of the network environment, it is more suitable for the needs of users.

Please refer to FIG. 1. FIG. 1 is a schematic diagram of a Time Division Multiple Access (TDMA) system according to a first embodiment of the present invention. The time division multiplexing access system includes (but is not limited to) Two mobile devices 100A, 100B and a base station 105, both of which are located within the signal coverage area 106 of the base station 105, that is, the two mobile devices 100A, 100B are located in the same cell. The two mobile devices 100A, 100B can perform data transmission (uploading or downloading) with the base station 105 by using different time slots (Time Slots), respectively, and the two mobile devices 100A, 100B respectively include at least the same device components and structures described below. For example, the mobile device 100A includes a control unit 110 and a transmission unit 115. The control unit 110 is configured to detect a plurality of time slots S 1 to S N specified by the base station 105. To determine whether the time-sharing multiplex access system has at least one time slot S n corresponding to a common wave communication, wherein N is a positive integer greater than 1 and represents the number of time slots, and the transmission unit 115 is coupled to the control unit 110. And used for this time sharing When the access system having at least a time slot S n, S n via the broadcast channel information a signal M info (e.g. voice, data messages, or voice messages) to other mobile devices (e.g. mobile device 100B). In this embodiment, the time-division multiplex access system standardizes the use of the time slot S n for co-wave voice communication (this is not a limitation of the present invention), and the plurality of cells located in the cell corresponding to the base station 105 The mobile device performs co-wave communication at the time point of the time slot S n , and the voice communication of the mobile devices uses the same frequency, and the time-division multiplex access system uses half-duplex communication mode for voice communication. at the point in time slot S n, and want to turn on voice calling mobile device will automatically broadcast voice, and other mobile devices will listen to whether there are any voice content being broadcast mobile voice and broadcast after the original If the mobile device listening to the voice becomes the calling terminal and wants to actively broadcast the voice, the voice broadcast can be performed at the time slot of the time slot S n of the next code frame (TDMA frame) so that other mobile devices can listen to the voice message.

Here, the mobile device 100A actively broadcasts the voice, and the signal strength of the mobile device 100A can effectively reach the mobile device 100B. In other words, the mobile device 100B can effectively listen to the voice message M info sent by the mobile device 100A without interference. If the mobile device 100B is unclear due to signal interference, the mobile device 100B can actively utter the call in the same time slot S n of the next code frame, and inform the mobile device 100A that the previous call is not heard clearly, so that the mobile device 100A It is understood that the voice message M info needs to be sent again to the mobile device 100B at the time slot S n of the next code frame, and the signal strength of the mobile device 100A can effectively reach the mobile device 100B but the situation is unclear, for example, by other The mobile device is also affected by active speech, or other devices use the frequency used by the common wave communication to cause interference. With the voice communication operation described above, the mobile device 100A of the present embodiment can perform group voice communication only by using its own radio communication technology (Radio Communication) technology, without connecting to the base station 105 and subsequent backbones. Since the network (Backbone Network) does not need to pass through the base station 105, the mobile devices 100A and 100B can perform voice communication under the time division multiplex access system. It should be noted that the mobile device 100A, 100B still has a circuit unit that receives the voice message to listen to the voice message sent by the foreign mobile device.

In addition, if the signal strengths between the aforementioned mobile devices 100A, 100B cannot reach each other effectively (that is, the signals are too weak), for example, when the mobile devices 100A and 100B are located or moved to both sides of the signal coverage area 106 of the base station 105, The voice call between the mobile devices 100A, 100B can also be completed by the transfer of the base station 105. In other words, the base station 105 can serve as a relay for voice communication between the mobile devices 100A, 100B. Please refer to FIG. 2. FIG. 2 is a schematic diagram of a time division multiplexing access system according to a second embodiment of the present invention. As shown in FIG. 2, the signal between the mobile devices 100A and 100B is weak or the signal cannot be received due to the long distance, so that the mobile device 100A can not listen to the mobile device 100A when the mobile device 100A actively speaks. When the mobile device 100B cannot directly receive the voice message M info broadcast by the mobile device 100A, the voice communication between the mobile devices 100A and 100B can be completed by the transmission through the base station 105. In other words, when the mobile device 100A M info broadcast voice messages, the transmission unit 115 based mobile device 100A via the slot when the time point of S n M info broadcast voice messages so that the voice message M info 105 transmits to the base station, then the base station 105 will first staging M info and voice message to another time slot broadcast voice messages M info again, the mobile device 100B to listen to voice messages M info. The advantage of this embodiment is that the two mobile devices can be effectively performed as long as the two mobile devices move to any location as long as the two mobile devices still belong to the cells corresponding to the same base station and can be uploaded and downloaded with the base station. Voice communication.

Please refer to FIG. 3, which is a block diagram of the base station 105 shown in FIG. As shown in FIG. 3, the base station 105 includes a control circuit 305, a receiving circuit 310 and a transmission circuit 315. The control circuit 305 is configured to detect a plurality of time slots S specified by the time division multiplex access system. 1 to S N , to determine whether the time division multiplex access system has a first time slot S and a second time slot S ′ corresponding to a common wave communication, and the receiving circuit 310 is coupled to the control circuit 305 and is configured according to The result of the control circuit 305 is to receive an information signal M info broadcasted by the mobile device 100A via the time slot S. The transmission circuit 315 is coupled to the control circuit 305 and broadcasts the information signal M info via the time slot S' according to the result of the control circuit 305. To the mobile device 100B, the first time slot S and the second time slot S' may be the same time slot of different code frames, different time slots of the same code frame, or different time slots of different code frames, for example, first, the second time slot S, S 'may be the same slot S when a frame is n, the different frames of the same or a different slot S n is not the same frame slot S n, S m, in other words, the base S time slot table 105 in the preceding frame may be a mobile apparatus 100A receives the n voice message M info, the In the same frame of time slots S m, M info broadcast voice messages to the mobile device when a next frame or slot S n while the next frame of the slot S m, then the received 100B, and therefore, even if The mobile devices 100A and 100B cannot directly perform voice signal transmission. However, the group voice communication between the mobile devices 100A and 100B can be completed by the transmission of the base station 105.

Please refer to FIG. 4, which is a schematic diagram of a time division multiplexing access system according to a third embodiment of the present invention. As shown in FIG. 4, the time division multiplex access system includes a base station 105 and at least three mobile devices 400A, 400B, 400C, wherein the mobile devices 400A, 400B, 400C are located in the signal coverage area 106 of the base station 105. The mobile devices 400A and 400C are just moved to the two sides of the signal coverage area 106 of the base station 105, so that the direct transmission of the signals of the two mobile devices 400A, 400C is relatively weak (that is, the signals cannot be effectively transmitted to each other). An electronic device is required as a repeater to assist in the transmission of voice communication. In this embodiment, the mobile device 400B is used as a repeater for transmitting the voice message sent by the mobile device 400A to the mobile device 400C. In order to establish the voice communication between the mobile devices 400A and 400C, the internal components and structures of the mobile devices 400A to 400C are the same. To avoid over-explaining, the mobile device 400B is only described as an example. The mobile device 400B includes a control unit 410, a transmission unit 415 and a receiving unit 420. The control unit 410 is configured to detect a base of the time division multiplex access system. Standardization of a plurality of 105 time slots S 1 ~ S N, to determine whether the TDM access system corresponding to a total of whether the wave has a communication slot S n, the transmission unit 415 is coupled to the system control unit 410 and configured to When the time division multiplex access system has the time slot S n , an information signal M info is broadcasted through the time slot S n , and the receiving unit 420 is coupled to the transmission unit 415 and the control unit 410 , and is used by the mobile device 400B via the mobile device 400B. Before the time slot S n broadcasts the information signal M info , the information signal M info (for example, a voice message) broadcasted by the mobile device 400A is received via the time slot S n corresponding to the common wave communication, so that the voice message M info is further transmitted through the mobile device. 400B is broadcast to mobile device 400C, wherein mobile devices 400A-400C are all within signal coverage 106 of the same base station 105. That is, in the case of voice communication, the mobile device 400B, as the receiving terminal, receives the voice message M info of the mobile device 400A (the calling terminal) in the time slot S n of the previous code frame, and then the mobile device 400B becomes the calling message. The received voice message M info is broadcasted in the time slot S n of the next code frame. Therefore, the mobile device 400C can effectively listen to the voice message of the mobile device 400A. In addition, the mobile device 400B can also broadcast the voice message M info at different time slots of the same code frame or at different time slots of different code frames when the mobile device is the caller. All the design variants belong to the scope of the present invention.

Please refer to FIG. 5. FIG. 5 is a schematic diagram of a time division multiplexing access system according to a fourth embodiment of the present invention. As shown in FIG. 5, the time division multiplexing access system includes base stations 105A, 105B and at least three mobile devices 500A, 500B, 500C, wherein the components and operations of the mobile devices 500A, 500B, 500C are the same as the fourth The mobile devices 500A, 500B, and 500C shown in the figure are the same and will not be further described herein. As shown in FIG. 5, the signal coverage areas 106A, 106B of the base stations 105A, 105B partially overlap each other, and the mobile device 500B is located or moved to a partially overlapping signal coverage range of the two base stations 105A, 105B, in other words, In the time division multiplexing access system, although the signals of the base stations 105A and 105B are not synchronized with each other, the mobile device 500B is located in the overlapping signal coverage of the base stations 105A and 105B at the same time, so the mobile device 500B is The signals can be synchronized with the signals of the base stations 105A and 105B respectively. Since the mobile device 500B can perform signal synchronization with the two base stations 105A and 105B, respectively, the mobile device 500B can serve as a repeater for voice communication of the mobile devices 500A and 500C. In the present embodiment, the mobile device 500A is located in the signal coverage area 106A of the base station 105A and the signal strength can effectively reach the mobile device 500B. In addition, the mobile device 500C is located in the signal coverage area 106B of the base station 105B and its signal strength can effectively reach the mobile device 5 Are 00B, when the mobile device 500A M info broadcast voice messages, mobile device 500B will receive a voice message M info broadcast it, followed by a broadcast voice message M info, 500C such that the mobile device can receive voice messages issued by mobile device 500A M info , and the mobile device 500C can also be the active caller and broadcast the voice message M info ', at which time the mobile device 500B receives the voice message M info ' broadcasted by it, and then broadcasts the voice message M info ', so that The mobile device 500A can receive the voice message M info ' sent by the mobile device 500C, so there is no problem in two-way voice communication.

It should be noted that the voice communication of the mobile devices 500A, 500C can also be achieved through the base stations 105A, 105B. Please refer to FIG. 6, which is a schematic diagram of the time division multiplexing access system according to the fifth embodiment of the present invention. . As shown in FIG. 6, mobile device 500A M info broadcast voice messages, the base station 105A receives a voice message M info broadcast it, then after M info broadcast voice messages to the mobile device 500B, the mobile device 500B receives base station 105A The broadcasted voice message M info , then broadcasts the voice message M info to the base station 105B, the base station 105B receives the voice message M info broadcast by the mobile device 500B, and then broadcasts the voice message M info to the mobile device 500C, and vice versa. The mobile device 500C transmits the voice message Minfo ' to the mobile device 500A, and also transmits the voice message Minfo ' indirectly to the mobile device 500A via the transfer of the base station 105B, the mobile device 500B, and the base station 105A. Therefore, even in the present embodiment, the direct signal strengths of the mobile devices 500A, 500B cannot be effectively reached each other and the direct signal strengths of the mobile devices 500B, 500C cannot reach each other effectively, and the two-way voice can still be reached between the mobile devices 500A, 500C. communication.

For the security of group voice communication, as long as the voice content is encrypted, and the mobile devices belonging to the same group share the key required for decryption, other electronic devices that are not the same group can be prevented from maliciously The voice content is captured, and thus the concept of an embodiment of the present invention can be effectively applied to the operation of information/voice communication of a plurality of different groups. In addition, the foregoing embodiment uses the time slot corresponding to the common wave communication to perform the common wave communication of the voice, which occupies less time slots for voice communication, and the overall system performance is better, and therefore, more can be made at the same time. The mobile device participates in group communication.

The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.

100A, 100B, 400A~400C, 500A~500C. . . Mobile device

105, 105A, 105B. . . Base station

106, 106A, 106B. . . Base station signal coverage

110, 410. . . control unit

115, 415. . . Transmission unit

305. . . Control circuit

310. . . Receiving circuit

315. . . Transmission circuit

420. . . Receiving unit

Figure 1 is a schematic diagram of a time division multiplex access system in accordance with a first embodiment of the present invention.

2 is a schematic diagram of a time division multiplex access system according to a second embodiment of the present invention.

Figure 3 is a block diagram of the base station shown in Figure 2.

Figure 4 is a schematic diagram of a time division multiplex access system in accordance with a third embodiment of the present invention.

Figure 5 is a schematic diagram of a time division multiplex access system in accordance with a fourth embodiment of the present invention.

Figure 6 is a schematic diagram of a time division multiplex access system according to a fifth embodiment of the present invention.

100A, 100B. . . Mobile device

105. . . Base station

106. . . Base station signal coverage

110. . . control unit

115. . . Transmission unit

Claims (10)

  1. A communication method using a time division multiplex access (TDMA) system, comprising: detecting a plurality of time slots (Time Slots) specified by a base station of the time division multiplex access system to determine the score Whether the multiplex access system has a time slot corresponding to a common wave communication; when the time division multiplex access system has the time slot, a first mobile device is used to broadcast an information signal via the time slot; Before the first mobile device broadcasts the information signal through the time slot, the first mobile device receives the information signal broadcast by the third mobile device via the time slot corresponding to the common wave communication, so that the information signal is further The first mobile device is broadcasted to at least one second mobile device, wherein the first mobile device and the third mobile device are located in a signal coverage area of the same base station, and the first mobile device and the second mobile device are located Signal coverage of the same base station.
  2. The communication method of claim 1, wherein the information signal is directly transmitted by the first mobile device to the at least one second mobile device.
  3. The communication method of claim 1, further comprising: broadcasting, by the first mobile device, the information signal to the base station via the time slot, so that the information signal is rebroadcasted to the base station via the base station At least one second mobile device.
  4. The communication method of claim 1, wherein the at least one second mobile device and the third mobile device are located within a signal coverage area of the same base station.
  5. The communication method of claim 1, wherein the at least one second mobile device and the third mobile device are respectively located in signal coverage of different base stations.
  6. A mobile device using a time division multiplex access system includes: a control unit for detecting a plurality of time slots specified by a base station of the time division multiplex access system, Determining whether the time-sharing multiplex access system has a time slot corresponding to a common wave communication; a transmission unit coupled to the control unit, when the time division multiplex access system has the time slot, The time slot broadcasts an information signal; and a receiving unit is configured to receive, by the time slot corresponding to the common wave communication, a broadcast of the first specific mobile device before the mobile device broadcasts the information signal through the time slot An information signal for broadcasting the information signal to the at least one second specific mobile device via the mobile device, wherein the mobile device and the first specific mobile device are located in a signal coverage area of the same base station, and the mobile device and the mobile device The second specific mobile device is located in the signal coverage of the same base station.
  7. The mobile device of claim 6, wherein the mobile device transmits the mobile device The transmitting unit directly transmits the information signal to the at least one second specific mobile device.
  8. The mobile device of claim 6, wherein the transmission unit of the mobile device broadcasts the information signal to the base station via the time slot, so that the information signal is rebroadcasted to the at least one via the base station. The second specific mobile device.
  9. The mobile device of claim 6, wherein the first specific mobile device and the at least one second specific mobile device are located within a signal coverage area of the same base station.
  10. The mobile device of claim 6, wherein the first specific mobile device and the at least one second specific mobile device are respectively located in signal coverage of different base stations.
TW099114347A 2010-05-05 2010-05-05 Communication method utilized in time division multiple access system, related mobile device and base station TWI488527B (en)

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US8958398B2 (en) * 2011-09-26 2015-02-17 Broadcom Corporation Time division multiple access (TDMA) media access control (MAC) adapted for single user, multiple user, multiple access, and/or MIMO wireless communications

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