EP0693835A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Synchronization of a wireless telephone
Assignee: Tokyo Sanyo Electric Co Ltd
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Filing: 1995-07-20
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Granted: —
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Expires: 2015-07-20
Abstract
Abstract In a wireless telephone of a mobile communication system, which performs transmission in series of bursts, in synchronism with a receive signal transmitted from the base station, each burst of transmission being performed responsive to a transmission timing signal, a sync signal is detected from the receive signal, the transmission timing signal is generated on the basis of the sync signal, and a each burst of transmission is effected in accordance with the transmission timing signal. When the sync signal ceased to be detected, said transmitting timing signal is autonomously generated for a certain time period after the sync signal is last detected. In another aspect of the invention, during reception in a first channel, the channel quality of another vacant channel is measured by transferring PLL data to the PLL prior to the slot in which the measurement is effected. In a further aspect of the invention, bit stream data transmitted from the base station is converted into byte stream data and used for control within the wireless telephone.
Inventors
- 👤 Manabu c/o Tottori Sanyo Elec. Co. Ltd. Yamane
- 👤 Junji c/o Tottori Sanyo Elec. Co. Ltd. Tanaka
- 👤 Hideko c/o Tottori Sanyo Elec.Co. Ltd. Taniguchi
- 👤 Mitsuru c/o Tottori Sanyo Elec.Co. Ltd. Morimoto
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 10:15
CPC Classifications
H; H04; H04W; H04W56/00; H04W56/0055; H04W56/0065; H04W56/007; H04W56/0075; H04W56/0085; H04B; H04B7/00; H04B7/24; H04B7/26; H04B7/2662; H04B7/2671; H04B7/2678; H04B7/2681; H04L; H04L7/00; H04L7/0079; H04L7/0083; H04J; H04J3/00; H04J3/02; H04J3/06; H04J3/0635; H04J3/0685; H04L7/02; H04L7/033; H04L7/04; H04W36/00; H04W36/34; H04W36/36
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
132 words
A wireless telephone of a mobile communication system, which performs transmission in series of bursts, in synchronism with a receive signal in the form of a frame, transmitted from the base station, each burst of transmission being performed responsive to a transmission timing signal, comprising: means (9) for detecting a sync signal from the receive signal; means (11, T3, S104,S107) for generating said transmission timing signal on the basis of the sync signal; means (11, T3, S107, S108) for autonomously generating said transmitting timing signal when the sync signal is not detected; means (8) effecting said each burst of transmission in accordance with the transmission timing signal; and means (11, S102, S103) for preventing generation of said transmission timing signal when the sync signal is not detected for a predetermined time (Ta).
Claim 2
Dependent Claim
66 words
The wireless telephone according to claim 1, wherein said means for autonomously generating said transmission timing signal comprises timer means (T3, S107, S108) measuring a predetermined time corresponding to an interval between successive bursts of transmission, from the generation of the transmission timing signal for a preceding burst of transmission, with the measurement of the predetermined time being made by reference to an internal oscillator (11g).
Claim 3
Independent Claim
124 words
A method communication of a wireless telephone of a mobile communication system, which performs transmission in series of bursts, in synchronism with a receive signal in the form of a frame, transmitted from the base station, each burst of transmission being performed responsive to a transmission timing signal, comprising the steps of: detecting a sync signal from the receive signal; generating, when said sync signal is detected, the transmission timing signal on the basis of the sync signal; autonomously generating the transmitting timing signal when the sync signal is not detected; effecting said each burst of transmission in accordance with the transmission timing; and stopping the generation of the transmission timing signal when the sync signal is not detected for a predetermined time (Ta).
Claim 4
Dependent Claim
113 words
The method telephone according to claim 3, wherein said step of autonomously generating said transmission timing signal comprises measuring a predetermined time corresponding to an interval between successive bursts of transmission, from the generation of the transmission timing signal for a preceding burst of transmission, with the measurement of the predetermined time being made by reference to an internal oscillator. With the above arrangement, if for some reason, the signal from the base station is not received at the wireless telephone, transmission from the wireless telephone is continued until the expiration of a predetermined time (Ta). Accordingly, reception at the base station of the transmit signal from the wireless telephone can be continued.
Claim 5
Dependent Claim
280 words
A wireless telephone of a TDMA system having a MAHO function, comprising: reception means (6) receiving a signal from a base station, said reception means (6) capable of reception in a selected one of a plurality of channels of different frequencies; a controller (11) for causing the reception means (6) in a state of reception in a first channel, to perform tentative reception and measurement in a second channel to find whether it is desirable to change a reception channel signal from the first channel to the second channel; a PLL (5) for determining the frequency of the signal to be received by said reception means (6); said controller (11, S211, S213; S221, S223) normally causing said PLL to generate a first frequency corresponding to the first channel by providing said PLL with first control data, causing, during said MAHO operation, said PLL to generate a second frequency corresponding to the second channel by providing said PLL with second control data, and applying a change timing signal for causing the PLL to change from the first frequency to the second frequency; and means (11, S216, S228) for measuring the channel quality of the said second channel; wherein said signal transmitted from said base station is time-divided in a plurality of slots including a first slot which is currently allocated to the wireless telephone and a second slot in which the measurement of the channel quality of said second channel is to be effected, and said controller (11) performs the operation for transferring the first control data to said PLL, prior to the commencement of the second slot, and performs said operation for changing the generated frequency during said second slot.
Claim 6
Dependent Claim
22 words
The telephone according to claim 5, wherein said controller (11) transfers the second control data to said PLL in said first slot.
Claim 7
Dependent Claim
35 words
The telephone according to claim 5, wherein said controller (11) transfers the second control data to said PLL during a period other than a period for transmission from the wireless telephone to the base station.
Claim 8
Dependent Claim
28 words
The telephone according to claim 5 or 7, wherein said controller (11) transfers the second control data to said PLL in a period other than the first slot.
Claim 9
Dependent Claim
100 words
A wireless telephone comprising: a receive bit stream data memory (D1) for storing bit stream data received from a base station; a plurality of message tables (342) selected according to a message type of the bit stream data, each message table defining how each part of the bit stream data is to be processed for conversion into byte stream data; control means (11a) for extracting said each part of the bit stream data and producing a corresponding part of byte stream data; said each message table designating the number of bits forming said each part of the bit stream data.
Claim 10
Dependent Claim
36 words
The wireless telephone according to claim 9, wherein said each message table further designating the memory location within said bit stream data memory from which said each part of the bit stream data should be extracted.
Claim 11
Dependent Claim
59 words
The wireless telephone according to claim 9, further comprising a receive byte stream data memory (D2) for storing the byte stream data, wherein said each message table designates memory location in said receive byte stream data memory into which said corresponding part of the byte stream data obtained by conversion from the bit stream data is to be stored.
Claim 12
Dependent Claim
34 words
The wireless telephone according to claim 9, wherein said each message table defining the manner of processing said each part of the bit stream data according to a bit type of said each part.
Claim 13
Dependent Claim
127 words
A wireless telephone comprising: a transmit byte stream data memory (D11) for storing byte stream data to be transmitted to a base station; a plurality of message tables (346) selected according to a message type of the byte stream data, each message table defining how each part of the byte stream data is to be processed for conversion into bit stream data; control means (11a) for extracting said each part of the byte stream data and producing a corresponding part of bit stream data; a transmit bit stream data memory (D12) for storing the bit stream data obtained by conversion from said byte stream data; said each message table designating the bit position into which said corresponding part of the bit stream data is to be stored.
Claim 14
Dependent Claim
36 words
The wireless telephone according to claim 13, wherein said each message table designating the byte position in said byte stream data memory from which said each part of the byte stream data is to be extracted.
Claim 15
Dependent Claim
34 words
The wireless telephone according to claim 13, wherein said each message table defining the manner of processing said each part of the byte stream data according to a bit type of said each part.
References Cited (Backward Citations)
JPH06104861A
Cited
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