Header structure for TDD systems
First Claim
1. Wireless transmission method, comprising the step of:
- transmitting data in frames according to a time divisional duplex (TDD) system, wherein frame comprises a header slot (HS) and a plurality of traffic slots (TS), wherein the header slot (HS) and the individual traffic slots (TS) have the same time duration, wherein the header slot (HS) occupies a single time slot, and wherein the header slot (HS) is subdivided into;
a downlink channel (DC) for the transmission of synchronization data (SYNCH) and system data from a base station (1) to at least one mobile station (2, 3, 4), and an uplink channel (UC) for the transmission of registration data (RACH) from at least one mobile station (3) to the base station (1).
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Accused Products
Abstract
The present invention relates to a header structure for a TDD system which uses preferably an OFDM transmission system. Thereby a header slot according to the present invention fits entirely into one time slot of the GSM TDD structure. The header slot HS comprises a downlink channel DC and an uplink channel UC. The downlink channel DC comprises a synchronization channel SYNCH, a general broadcast channel GBCCH as well as an optional broadcast channel OBCCH. The uplink channel comprises a random access channel RACH. Both the synchronization channel SYNCH and the general broadcast channel GBCCH can comprise two identical repeated symbols S1, S2. The repetition of the identical symbols S1, S2 provides for a very efficient (secure) data transmission and a high-efficient correlation in view of a frequency and time synchronization due to the large number of samples in the symbols of the synchronization channel SYNCH and the general broadcast channel GBCCH.
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Citations
24 Claims
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1. Wireless transmission method, comprising the step of:
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transmitting data in frames according to a time divisional duplex (TDD) system, wherein frame comprises a header slot (HS) and a plurality of traffic slots (TS), wherein the header slot (HS) and the individual traffic slots (TS) have the same time duration, wherein the header slot (HS) occupies a single time slot, and wherein the header slot (HS) is subdivided into;
a downlink channel (DC) for the transmission of synchronization data (SYNCH) and system data from a base station (1) to at least one mobile station (2, 3, 4), and an uplink channel (UC) for the transmission of registration data (RACH) from at least one mobile station (3) to the base station (1). - View Dependent Claims (2, 3, 12, 13)
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4. Wireless transmission method, comprising the step of:
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transmitting data in frames according to a time divisional duplex (TDD) system, wherein each frame comprises a header slot (HS) and a plurality of traffic slots (TS), wherein the header slot (HS) and the individual traffic slots (TS) have the same time duration, wherein the header slot (HS) occupies a single time slot, wherein the header slot (HS) is subdivided into;
a downlink channel (DC) for the transmission of synchronization data (SYNCH) and system data from a base station (1) to at least one mobile station (2, 3, 4), and an uplink channel (UC) for the transmission of registration data (RACH) from at least one mobile station (3) to the base station (1), wherein the downlink channel (DC) of the header slot (HS) comprises a synchronization channel (SYNCH) and at least one broadcast channel (GBCCH, OBCCH) for the transmission of cell and/or system data to all or selected mobile stations (2, 3, 4), and wherein the synchronization channel (SYNCH) of the header slot (HS) comprises at least two identical repeated symbols (S1,S2). - View Dependent Claims (6)
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5. Wireless transmission method, comprising the step of:
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transmitting data in frames according to a time divisional duplex (TDD) system, wherein each frame comprises a header slot (HS) and a plurality of traffic slots (TS), wherein the header slot (HS) and the individual traffic slots (TS) have the same time duration, wherein the header slot (HS) occupies a single time slot, wherein the header slot (HS) is subdivided into;
a downlink channel (DC) for the transmission of synchronization data (SYNCH) and system data from a base station (1) to at least one mobile station (2, 3, 4), and an uplink channel (UC) for the transmission of registration data (RACH) from at least one mobile station (3) to the base station (1), wherein the downlink channel (DC) of the header slot (HS) comprises a synchronization channel (SYNCH) and at least one broadcast channel (GBCCH, OBCCH) for the transmission of cell and/or system data to all or selected mobile stations (2, 3, 4), and wherein the at least one broadcast channel (GBCCH, OBCCH) of the header slot (HS) comprises at least two identical repeated symbols.
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7. Wireless transmission method, comprising the step of:
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transmitting data in frames according to a time divisional duplex (TDD) system, wherein each frame comprises a header slot (HS) and a plurality of traffic slots (TS), wherein the header slot (HS) and the individual traffic slots (TS) have the same time duration, wherein the header slot (HS) occupies a single time slot, wherein the header slot (HS) is subdivided into;
a downlink channel (DC) for the transmission of synchronization data (SYNCH) and system data from a base station (1) to at least one mobile station (2, 3, 4), and an uplink channel (UC) for the transmission of registration data (RACH) from at least one mobile station (3) to the base station (1), wherein the downlink channel (DC) of the header slot (HS) comprises a synchronization channel (SYNCH) and at least one broadcast channel (GBCCH, OBCCH) for the transmission of cell and/or system data to all or selected mobile stations (2, 3, 4), wherein a general broadcast channel (GBCCH) is transmitted in the header slot (HS) of every frame, and wherein an optional broadcast channel (OBCCH) is only transmitted when the capacity of the general broadcast channel (GBCCH) is not sufficient or when specific data are to be transmitted. - View Dependent Claims (8, 10, 11)
wherein a basic subcarrier spacing of 4.167 kHz is used for the OFDM system and only every eighth subcarrier (SC) is modulated in the synchronization channel (SYNCH). -
11. Wireless transmission method according to claim 8, characterized in that in the optional broadcast channel (OBCCH) of the header slot (HS) a subset of subcarriers (SC) is allocated to the transmission of data of a predetermined mobile station (2, 3, 4).
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9. Wireless transmission method, comprising the step of:
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transmitting data in frames according to a time divisional duplex (TDD) system, wherein each frame comprises a header slot (HS) and a plurality of traffic slots (TS), wherein the header slot (HS) and the individual traffic slots (TS) have the same time duration, wherein the header slot (HS) occupies a single time slot, and wherein the header slot (HS) is subdivided into;
a downlink channel (DC) for the transmission of synchronization data (SYNCH) and system data from a base station (1) to at least one mobile station (2, 3, 4), and an uplink channel (UC) for the transmission of registration data (RACH) from at least one mobile station (3) to the base station (1), wherein, at least for the transmission of the synchronization channel, (SYNCH) an OFDM system comprising a plurality of equally spaced subcarriers (SC) is used, and wherein the time duration of a symbol (S1, S2) of the synchronization channel (SYNCH) is (1/n)×
(the subcarrier spacing of the OFDM system), n being an integer greater than 1, of the time duration of OFDM modulated symbols in a traffic channel (TC), and only every n-th subcarrier (SC) is modulated in the synchronization channel (SYNCH).
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14. Wireless transmission system, comprising:
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a base station (1); and
at least one mobile station (2, 3, 4), wherein the base station (1) and the mobile station (2, 3, 4) transmit data in frames according to a time divisional duplex (TDD) system, wherein each frame comprises a header slot (HS) and a plurality of traffic slots (TS), wherein the header slot (HS) comprises one single time slot, wherein the header slot (HS) and the individual traffic slots (TS) have the same time duration, and wherein the header slot is subdivided into;
a downlink channel (DC) for the transmission of synchronization data (SYNCH) and system data from said base station (1) to said at least one mobile station (2, 3, 4), and an uplink channel (UC) for the transmission of registration data (RACH) from said at least one mobile station (2, 3, 4) to the base station (1). - View Dependent Claims (15, 16, 24)
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17. Wireless transmission system, comprising:
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a base station (1); and
at least one mobile station (2, 3, 4), wherein the base station (1) and the mobile station (2, 3, 4) transmit data in frames according to a time divisional duplex (TDD) system, wherein each frame comprises a header slot (HS) and a plurality of traffic slots (TS), wherein the header slot (HS) comprises one single time slot, wherein the header slot (HS) and the individual traffic slots (TS) have the same time duration, wherein the header slot is subdivided into;
a downlink channel (DC) for the transmission of synchronization data (SYNCH) and system data from said base station (1) to said at least one mobile station (2, 3, 4), and an uplink channel (UC) for the transmission of registration data (RACH) from said at least one mobile station (2, 3, 4) to the base station (1), wherein the downlink channel (DC) of the header slot (HS) comprises a synchronization channel (SYNCH) and at least one broadcast channel (GBCCH, OBCCH) for the transmission of cell and/or system data, and wherein the synchronization channel (SYNCH) of the header slot (HS) comprises at least two identical repeated symbols (S1, S2). - View Dependent Claims (19)
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18. Wireless transmission system, comprising:
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a base station (I); and
at least one mobile station (2, 3, 4), wherein the base station (1) and the mobile station (2, 3, 4) transmit data in frames according to a time divisional duplex (TDD) system, wherein each frame comprises a header slot (HS) and a plurality of traffic slots (TS), wherein the header slot (HS) comprises one single time slot, wherein the header slot (HS) and the individual traffic slots (TS) have the same time duration, wherein the header slot is subdivided into;
a downlink channel (DC) for the transmission of synchronization data (SYNCH) and system data from said base station (1) to said at least one mobile station (2, 3, 4), and an uplink channel (UC) for the transmission of registration data (RACH) from said at least one mobile station (2, 3, 4) to the base station (1), wherein the downlink channel (DC) of the header slot (HS) comprises a synchronization channel (SYNCH) and at least one broadcast channel (GBCCH, OBCCH) for the transmission of cell and/or system data, and wherein the at least one broadcast channel (GBCCH, OBCCH) of the header slot (HS) comprises at least two identical repeated symbols.
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20. Wireless transmission system, comprising:
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a base station (1); and
at least one mobile station (2, 3, 4), wherein the base station (1) and the mobile station (2, 3, 4) transmit data in frames according to a time divisional duplex (TDD) system, wherein each frame comprises a header slot (HS) and a plurality of traffic slots (TS), wherein the header slot (HS) comprises one single time slot, wherein the header slot (HS) and the individual traffic slots (TS) have the same time duration, wherein the header slot is subdivided into;
a downlink channel (DC) for the transmission of synchronization data (SYNCH) and system data from said base station (1) to said at least one mobile station (2, 3, 4), and an uplink channel (UC) for the transmission of registration data (RACH) from said at least one mobile station (2, 3, 4) to the base station (1), wherein the downlink channel (DC) of the header slot (HS) comprises a synchronization channel (SYNCH) and at least one broadcast channel (GBCCH, OBCCH) for the transmission of cell and/or system data, wherein a general broadcast channel (GBCCH) is provided in the header slot (HS) of every time frame, and wherein an optional broadcast channel (OBCCH) is only provided when the capacity of the general broadcast (GBCCH) is not sufficient or when specific data are to be transmitted.
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21. Wireless transmission system, comprising:
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abase station (1); and
at least one mobile station (2, 3, 4), wherein the base station (1) and the mobile station (2, 3, 4) transmit data in frames according to a time divisional duplex (TDD) system, wherein each frame comprises a header slot (HS) and a plurality of traffic slots (TS), p1 wherein the header slot (HS) comprises one single time slot, wherein the header slot (HS) and the individual traffic slots (TS) have the same time duration, wherein the header slot is subdivided into;
a downlink channel (DC) for the transmission of synchronization data (SYNCH) and system data from said base station (1) to said at least one mobile station (2, 3, 4), and an uplink channel (UC) for the transmission of registration data (RACH) from said at least one mobile station (2, 3, 4) to the base station (1), wherein the downlink channel (DC) and the uplink channel (UC) of the header slot (HS) have the same time duration, and wherein, at least for the transmission of the downlink channel (DC) of the header slot (HS), an OFDM system comprising a plurality of equally spaced subcarriers (SC) is used. - View Dependent Claims (22, 23)
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Specification