EP0690593A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Transmitter and receiver for use in TDMA/TDD mobile radio communications systems having loopback test facilities
Assignee: Mitsubishi Electric Corp
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Filing: 1995-07-03
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Granted: —
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Expires: 2015-07-03
Abstract
Abstract A radio apparatus according to a TDMA/TDD system uses its own transmitter (2) and receiver (3) so as to perform a loopback test for checking normality of the apparatus (1A) during a period of an unassigned slot. A loopback test signal is output from its own transmitter (2) during an unassigned transmitting slot and is received by its own receiver (3). The signal is temporarily stored in a memory (14) and is read during an unassigned receiving slot. The apparatus (1A) thus performs a loopback test. Since a loopback test can be performed by use of its own transmitter (2) and receiver (3) during an unassigned slot, a transmitting and receiving device (tester) specifically used for a loopback test is not required. Also, a loopback test can be carried out even while normal communications are being made.
Inventors
- 👤 Takashi c/o Mitsubishi Denki K.K. Murata
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 14:46
CPC Classifications
H; H04; H04W; H04W24/00; H04B; H04B17/00; H04B17/0082; H04B17/0085; H04B17/10; H04B17/15; H04B17/19; H04L; H04L1/00; H04L1/24; H04L1/242; H04L1/243
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
100 words
A radio apparatus according to a TDMA/TDD system, comprising: - a transmitter (2) for transmitting data during a transmitting slot; - an attenuator (13) for attenuating the data transmitted from the transmitter (2); - a receiver (3) for receiving the data attenuated by the attenuator (13) during the transmitting slot; - a memory (14) for storing the data received by the receiver (3); and - a controller (11, 16, 40) for comparing the data read from the memory (14) with the data transmitted from the transmitter (2) so as to assess normality of the apparatus during an unassigned receiving slot.
Claim 2
Dependent Claim
22 words
A radio apparatus according to claim 1, wherein the transmitting slot is unassigned, and the data is used for a loopback test.
Claim 3
Dependent Claim
87 words
A radio apparatus according to claim 1 or 2, wherein the controller (40) comprises a transmitting signal processing section (11) and a receiving signal processing section (16), the transmitting signal processing section (11) generating the loopback test data and transmitting it to the transmitter (2), the receiving signal processing section (16) comparing the loopback test data read from the memory (14) with the loopback test data generated in the transmitting signal processing section (11), and upon such a comparison, issuing an alarm when an abnormality has occurred.
Claim 4
Dependent Claim
40 words
A radio apparatus according to any of claims 1 to 3, wherein - the transmitting slot is occupied for communicating with a mobile station (20), and - the data is communication data used for communicating with the mobile station (20).
Claim 5
Dependent Claim
86 words
A radio apparatus according to any of claims 1 to 4, wherein the controller (40) comprises a transmitting signal processing section (11) and a receiving signal processing section (16), the transmitting signal processing section (11) generating the communication data and transmitting it to the transmitter (2), the receiving signal processing section (16) comparing the communication data read from the memory (14) with the communication data generated in the transmitting signal processing section (11), and upon such a comparison, issuing an alarm when an abnormality has occurred.
Claim 6
Dependent Claim
80 words
A radio apparatus according to a TDMA/TDD system, comprising: - a receiver (3) for receiving data through a transmitting/receiving antenna (5) during a receiving slot; - a memory (14) for storing the data received by the receiver (3) during the receiving slot; - a controller (40) for reading the data from the memory (14) during a transmitting slot; and - a transmitter (2) for transmitting the data read from the memory (14) during the transmitting slot through the antenna (5).
Claim 7
Dependent Claim
47 words
A radio apparatus according to claim 6, wherein the receiving slot is occupied for communicating with a mobile station (20), and the data is loopback test data used for communicating with the mobile station (20), the transmitting slot being occupied for communicating with the mobile station (20).
Claim 8
Dependent Claim
50 words
A radio apparatus according to claim 6 or 7, wherein the controller (40) comprises a transmitting signal processing section (11) and a receiving signal processing section (16), and the receiving signal processing section (16) reads the loopback test data from the memory (14) and transmits it to the transmitter (2).
Claim 9
Dependent Claim
108 words
A radio apparatus according to any of claims 6 to 8, wherein the receiving slot is formed of a first receiving slot segment occupied for communicating with a first mobile station (20) and a second receiving slot segment occupied for communicating with a second mobile station (30), the data being loopback test data used for communicating with the first mobile station (20) and also used for communicating with the second mobile station (30), the transmitting slot being formed of a first transmitting slot segment occupied for communicating with the first mobile station (20) and a second transmitting slot segment occupied for communicating with the second mobile station (30).
Claim 10
Dependent Claim
84 words
A radio apparatus according to any of claims 6 to 9, wherein the controller (40) comprises a transmitting signal processing section (11) and a receiving signal processing section (16), the memory (14) including first (14a) and second memory portions (14b), the receiving signal processing section (16) reading the loopback test data from the first memory portion (14a) and transmitting it to the transmitter (2) and also reading the loopback test data from the second memory portion (14b) and transmitting it to the transmitter (2).
References Cited (Backward Citations)
No citation records indexed.
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