US6181683B1 — Packet data transmission in code-division multipl…

Claim 1

Independent Claim 272 words

Method for the wireless transmission of data packets in a code division multiple access communication system wherein one of the code division multiple access channels (PRCH) is used in a time-shared fashion for the transmission of the data packets from several transmitting stations (MSy, MSz) to a receiving station (BS), comprising the following steps: sending a request from a transmitting station (MSy) to the corresponding receiving station (BS) of said communication system indicating the destination address to which said data packet(s) are to be routed, registering said transmitting station (MSy) and assigning an unique virtual connection identifier (VCIy) to it, attaching said transmitting station (MSy) to said code division multiple access channel (PRCH) used for the transmission of data packets, listening to the downlink of said code division multiple access channel (PRCH) used for the transmission of data packets until the corresponding receiving station (BS) broadcasts that it will be “idle” such that a random access to said code division multiple access channel (PRCH) used for the transmission of data packets is allowed in the next frame, ramping up the transmission power of said transmitting station (MSy) during said next frame until a certain power level is reached, transmitting said data packet(s) and said virtual connection identifier (VCIy) over the uplink of said code division multiple access channel (PRCH) used for the transmission of data packets to said receiving station (BS), and routing said data packet(s) to said destination address, the access to said code division multiple access channel (PRCH) used for the transmission of data packets being controlled by a multiple access protocol based on carrier sensing and collision detection (CSMA/CD).

Claim 2

Dependent Claim 272 words

Method for the wireless transmission of data packets in a code division multiple access communication system wherein one of the code division multiple access channels (PRCH) is used in a time-shared fashion for the transmission of the data packets from several transmitting stations (MSy, MSz) to a receiving station (BS), comprising the following steps: sending a request from a transmitting station (MSy) to the corresponding receiving station (BS) of said communication system indicating the destination address to which said data packet(s) are to be routed, registering said transmitting station (MSy) and assigning an unique virtual connection identifier (VCIy) to it, attaching said transmitting station (MSy) to said code division multiple access channel (PRCH) used for the transmission of data packets, listening to the downlink of said code division multiple access channel (PRCH) used for the transmission of data packets until the corresponding receiving station (BS) broadcasts that it will be “idle” such that a random access to said code division multiple access channel (PRCH) used for the transmission of data packets is allowed in the next frame, ramping up the transmission power of said transmitting station (MSy) during said next frame until a certain power level is reached, transmitting said data packet(s) and said virtual connection identifier (VCIy) over the uplink of said code division multiple access channel (PRCH) used for the transmission of data packets to said receiving station (BS), and routing said data packet(s) to said destination address, the access to said code division multiple access channel (PRCH) used for the transmission of data packets being controlled by a multiple access protocol based on carrier sensing and collision detection (CSMA/CD).

Claim 3

Dependent Claim 16 words

The method of claim 1 , wherein said communication system offers a connectionless packet data services.

Claim 4

Dependent Claim 46 words

The method of claim 1 , wherein at least two transmitting stations (MSx, MSz) intend to transmit data packet(s) and independently perform said power ramping and wherein said receiving station (BS) limits the total power of all contending transmitting stations (MSx, MSz) to a target power.

Claim 5

Dependent Claim 47 words

The method of claim 1 , wherein said receiving station (BS) indicates to said transmitting station (MSy) the data rate to be used on the uplink of said code division multiple access channel (PRCH) used for the transmission of data packets during the next frame or frames.

Claim 6

Dependent Claim 28 words

The method of claim 1 , wherein power control information is fed back from said receiving station (BS) to said transmitting station (MSy) during the power ramping step.

Claim 7

Dependent Claim 21 words

The method of claim 1 , wherein a transmitting station (MS) is registered only if traffic load on the network permits.

Claim 8

Dependent Claim 18 words

The method of claim 1 , wherein a long spreading code is used to transmit the data packet(s).

Claim 9

Dependent Claim 23 words

The method of claim 7 , wherein an inner convolutional code in conjunction with an outer cyclic redundancy check (CRC) code is used.

Claim 10

Dependent Claim 31 words

The method of claim 1 , wherein coherent demodulation is employed on the uplink and downlink of said code division multiple access channel (PRCH) used for the transmission of data packets.

Claim 11

Dependent Claim 40 words

The method of claim 9 , wherein the physical control channel (PCCH) of said code division multiple access channel (PRCH) used for the transmission of data packets is coherently demodulated on the downlink and differentially coherently demodulated on the uplink.

Claim 12

Dependent Claim 52 words

The method of claim 1 , wherein said code division multiple access channel (PRCH) used for the transmission of data packets is a full-duplex, asymmetrical channel that can be operated independently in both directions at variable user data rates up to 9.6 kbps (narrowband channel) or up to 64 kbps (mediumband channel).

Claim 13

Dependent Claim 28 words

The method of claim 1 , wherein said code division multiple access channel (PRCH) used for the transmission of data packets is structured in 10 ms time frames.

Claim 14

Dependent Claim 19 words

The method of claim 1 , wherein said data packet services are used for exchanging E-mail type of packets.

Claim 15

Dependent Claim 37 words

The method of claim 1 or 3 , wherein said receiving station (BS) acknowledges none of the contending transmitting stations (MSx, MSz) if it is not able to detect any of their virtual connection identifiers (VCIx, VCIz).

Claim 16

Dependent Claim 53 words

The method of claim 14 , wherein said contending transmitting stations (MSx, MSz) cease transmission immediately if they do not receive said acknowledgement from said receiving station (BS) and try to access said code division multiple access channel (PRCH) used for the transmission of data packets later to retransmit the whole data packet(s).

Claim 17

Dependent Claim 34 words

The method of claim 1 , wherein long data packets are fragmented so as to fit into the frames of said code division multiple access channel (PRCH) used for the transmission of data packets.

Claim 18

Dependent Claim 53 words

The method of claim 1 , wherein data rates on said code division multiple access channel (PRCH) used for the transmission of data packets can be allocated in a dynamic fashion, e.g. depending on the current traffic load on this code division multiple access channel (PRCH) used for the transmission of data packets.

Claim 19

Dependent Claim 280 words

Code division multiple access communication system for the wireless transmission of data packets wherein one of the code division multiple access channels (PRCH) is used in a time-shared fashion for the transmission of the data packets from several transmitting stations (MSy, MSz) to a receiving station (BS), comprising: means for sending a request from a transmitting station (MSy) to the corresponding receiving station (BS) of said communication system indicating the destination address to which said data packet(s) are to be routed, means for registering said transmitting station (MSy) and assigning an unique virtual connection identifier (VCIy) to it, means for attaching said transmitting station (MSy) to said code division multiple access channel (PRCH) used for the transmission of data packets, means for listening to the downlink of said code division multiple access channel (PRCH) used for the transmission of data packets until said receiving station (BS) broadcasts that it will be “idle” such that a random access to said code division multiple access channel (PRCH) used for the transmission of data packets is allowed in the next frame, means for ramping up the transmission power of said transmitting station (MSy) during said next frame until a certain power level is reached, means for transmitting said data packet(s) and said virtual connection identifier (VCIy) over the uplink of said code division multiple access channel (PRCH) used for the transmission of data packets to said receiving station (BS), and means for routing said data packet(s) to said destination address, means for controlling the access to said code division multiple access channel (PRCH) used for the transmission of data packets by a multiple access protocol based on carrier sensing and collision detection (CSMA/CD).

Claim 20

Dependent Claim 280 words

Code division multiple access communication system for the wireless transmission of data packets wherein one of the code division multiple access channels (PRCH) is used in a time-shared fashion for the transmission of the data packets from several transmitting stations (MSy, MSz) to a receiving station (BS), comprising: means for sending a request from a transmitting station (MSy) to the corresponding receiving station (BS) of said communication system indicating the destination address to which said data packet(s) are to be routed, means for registering said transmitting station (MSy) and assigning an unique virtual connection identifier (VCIy) to it, means for attaching said transmitting station (MSy) to said code division multiple access channel (PRCH) used for the transmission of data packets, means for listening to the downlink of said code division multiple access channel (PRCH) used for the transmission of data packets until said receiving station (BS) broadcasts that it will be “idle” such that a random access to said code division multiple access channel (PRCH) used for the transmission of data packets is allowed in the next frame, means for ramping up the transmission power of said transmitting station (MSy) during said next frame until a certain power level is reached, means for transmitting said data packet(s) and said virtual connection identifier (VCIy) over the uplink of said code division multiple access channel (PRCH) used for the transmission of data packets to said receiving station (BS), and means for routing said data packet(s) to said destination address, means for controlling the access to said code division multiple access channel (PRCH) used for the transmission of data packets by a multiple access protocol based on carrier sensing and collision detection (CSMA/CD).

Claim 21

Dependent Claim 211 words

Transceiver for use in a code division multiple access communication system for the wireless transmission of data packets, wherein one of the code division multiple access channels (PRCH) is used in a time-shared manner for the transmission of the data packets from several stations (MSy, MSz) to a receiving station (BS), comprising: means for sending a transmission request from a station (MSy) to the corresponding receiving station (BS) of said communication system indicating the destination address to which said data packet(s) are to be routed, means for attaching said station (MSy) to said code division multiple access channel (PRCH) used for the transmission of data packets, means for listening to the downlink of said channel (PRCH) until said receiving station (BS) broadcasts that it will be “idle” such that a random access to said code division multiple access channel (PRCH) used for the transmission of data packets is allowed in the next frame, means for ramping up the transmission power of said station (MSy) during said next frame until a certain power level is reached, and means for transmitting said data packet(s) and said virtual connection identifier (VCIy) over the uplink of said code division multiple access channel (PRCH) used for the transmission of data packets to said receiving station (BS).

Claim 22

Dependent Claim 211 words

Transceiver for use in a code division multiple access communication system for the wireless transmission of data packets, wherein one of the code division multiple access channels (PRCH) is used in a time-shared manner for the transmission of the data packets from several stations (MSy, MSz) to a receiving station (BS), comprising: means for sending a transmission request from a station (MSy) to the corresponding receiving station (BS) of said communication system indicating the destination address to which said data packet(s) are to be routed, means for attaching said station (MSy) to said code division multiple access channel (PRCH) used for the transmission of data packets, means for listening to the downlink of said channel (PRCH) until said receiving station (BS) broadcasts that it will be “idle” such that a random access to said code division multiple access channel (PRCH) used for the transmission of data packets is allowed in the next frame, means for ramping up the transmission power of said station (MSy) during said next frame until a certain power level is reached, and means for transmitting said data packet(s) and said virtual connection identifier (VCIy) over the uplink of said code division multiple access channel (PRCH) used for the transmission of data packets to said receiving station (BS).

Claim 23

Dependent Claim 50 words

The system of claim 18 , wherein said receiving station (BS) comprises means to indicate to said transmitting station (MSy) the data rate to be used on the uplink of said code division multiple access channel (PRCH) used for the transmission of data packets during the next frame or frames.

Claim 24

Dependent Claim 46 words

The transceiver of claim 19 , wherein said transmitting station (MSy) comprises means to adjust the data rate to be used on the uplink of said code division multiple access channel (PRCH) used for the transmission of data packets as indicated by a receiving station (BS).

Claim 25

Dependent Claim 26 words

The system of claim 18 or the transceiver of claim 19 , comprising means for encoding data packet(s) to be transmitted by a long spreading code.

Claim 26

Dependent Claim 52 words

The system of claim 18 , wherein said code division multiple access channel (PRCH) used for the transmission of data packets is a full-duplex, asymmetrical channel that can be operated independently in both directions at variable user data rates up to 9.6 kbps (narrowband channel) or up to 64 kbps (mediumband channel).

Claim 27

Dependent Claim 28 words

The system of claim 18 , wherein said code division multiple access channel (PRCH) used for the transmission of data packets is structured in 10 #ms time frames.

Claim 28

Dependent Claim 36 words

The transceiver of claim 19 , comprising means to fragment long data packets so as to fit them into the frames of said code division multiple access channel (PRCH) used for the transmission of data packets.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	2004-01-30	2004-07-31	2005-01-30	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2008-01-30	2008-07-31	2009-01-30	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2012-01-30	2012-07-31	2013-01-30	$7700.00	Window Closed / Lapsed

Packet data transmission in code-division multiple access communication systems

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