MIMOS TETRA DRIVER DOWNLOADMarch 7, 2020
As explained, a direct mode multiframe takes exactly 1. A burst is duration of radio carrier modulated with data. Two time slots are provided for a call transaction, a first and third time slot TN 1 , TN3 within a direct mode frame, for every communication channel. Although the descriptions above contain much specificity, these should not be construed as limiting the scope of the embodiment but as merely providing illustrations of some of the presently preferred embodiments. The exact timing of a direct mode multiframe of 1.
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Two time slots are provided for a call transaction, a first and third time slot within a direct mode frame, for every direct mode communication channel. The specific sequence used depends on the segment used and the identity of cell parameter.
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Synchronization burst uses one preamble, a third preamble. A method for enabling a mobile station MS to communicate directly with another mobile station using complete, subset or superset of TETRA-like direct mode features and at the same time be compatible with a target wireless broadband network air interface, said method comprising the steps of: However, a person skilled in the art should be able to allocate the direct mode preamble structure that will not cause false synchronization with normal WiMAX mobile station.
The preamble will be used by slave mobile station to synchronize with the transmitting mobile station. However, this may complicate the design of direct mode receiver because the transmission may potentially be received by a slave mobile station at different timing, frequency and phase offsets.
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The method of claim 4, further comprising the step of mapping one or more TETRA direct mode physical channels, each of which is made of two time slots per TETRA direct mode frame, to the available time slot allocations among the target wireless broadband network frames within a TETRA direct mode frame duration. The invention will now be described in greater detail, by way of tetea example, with reference tegra the accompanying drawings, in which:.
These fields are called a first block and a second block. Six extra WiMAX frames are padded to form a 1. Click for automatic bibliography generation.
The physical content within a time slot is carried by a burst. Some control bits C may also be added in symbol 1.
METHOD TO ENABLE TETRA-LLKE DIRECT MODE OPERATION TO WORK ON BROADBAND NETWORK – MIMOS BERHAD
As explained, a direct mode multiframe takes exactly 1. The method of claim 1wherein said step of mapping TETRA direct mode multiframe structure is performed by mapping a number of wireless broadband network frames such that the TETRA direct mode multiframe duration of 1.
A burst is duration of radio carrier modulated with data. The first burst is a linearization burst. WiMAX is suitable for centralized broadband transmission but there exists no active work in implementing direct mode communication miimos mobile stations.
To simplify design, the exemplary emulation of direct-mode normal burst mkmos use of the same number of symbols as in the emulation of direct-mode synchronization burst. The six extra padding frames can be lumped together into an extended direct mode frame or they can be evenly distributed within a multiframe so that each pad exists in every three direct mode frames, as shown in Fig.
In subsequent discussion, a fixed transparent zone is allocated with one transparent zone in a WiMAX frame per direct mode time slot. If twelve WiMAX frame is used per direct mode frame, the multiframe will have hetra duration of ms, which is shown in Fig. It is the combination of the above features and its technical advantages give rise to the uniqueness of such invention. Frames of broadband signals are arranged as a time slot to form a direct mioms multiframe, said multiframe is made up of 18 direct mode frames according to TETRA direct mode specification.
There are three different kinds of burst, as shown in Fig. miimos
WO// METHOD TO ENABLE TETRA-LLKE DIRECT MODE OPERATION TO WORK ON BROADBAND NETWORK
mimod To emulate the first and second block in normal burst and synchronization burst, the DL FUSC burst will be logically divided into two blocks. A call can occur in direct mode first channel, Channel A using a first and third time slot at time slot 1 and 3, while another call occurs in direct mode second channel, Channel B using a second and fourth time slot at time slot fetra and 4.
More transparent zones or one larger transparent zone can be accommodated for more direct mode channels to enable more concurrent calls. A transmitting direct mode mobile station will use all the subcarriers for transmission. The system of claim 10, wherein said DM-MS further including a means to detect the availability of the transparent zones when a base station is operating, for said 0 DM-MS to perform direct mode transmission.
Normal burst and synchronization burst have a preamble and a training sequence field. Since there are four time slots per frame, at frame K, two calls can be active at the same time.
If ten WiMAX frame is used per direct mode frame, the multiframe will have a duration of milliseconds. Synchronization burst, the second burst, carries control information and receive synchronization information from mobile station. Broadband communications, such as Worldwide Interoperability for Microwave Access WiMAX tettra, do not provide mobile station to mobile station communication. Other than these two channels, there ttera linearization channel, signaling channel and stealing channel.