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AssigneeLG Electronics Inc.
InventorsBin Chul Ihm, Chang Jae Lee, Yong Suk Jin, Jin Young Chun
Estimating the term…
A method of supporting a hybrid automatic retransmission request (HARQ) in an orthogonal frequency division multiplexing access (OFDMA) radio access system is disclosed. Preferably, the method comprises receiving a downlink data frame comprising a data map information element and a data burst comprising a plurality of layers, wherein each layer is encoded with a corresponding channel encoder, and wherein the data map information element is configured to support multiple antennas to achieve space time transmit diversity by providing control information associated with each one of the plurality of layers, wherein the control information comprises allocation of acknowledgement status channels corresponding to the plurality of layers, and transmitting in an uplink data frame a plurality of acknowledgement status, each acknowledgement status being associated with whether a corresponding layer of the plurality of layers is properly decoded.
A method of transmitting packet data in a wireless communication system configured to support multiple input and multiple output, the method comprising:
A wireless communication apparatus for transmitting packet data, the apparatus comprising:
A method of transmitting packet data in a wireless communication system configured to support multiple input and multiple output, the method comprising:
A wireless communication apparatus for transmitting packet data, the apparatus comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Hybrid protocols; Hybrid automatic repeat request [HARQ]: with retransmission of additional or different redundancy
Properties of the code: cyclotomic systems, e.g. Bell Labs Layered Space-Time [BLAST]
In which the return channel carries supervisory signals, e.g. repetition request signals: details of the supervisory signal
Buffer management: combining techniques, e.g. code combining
Term ended 27 Dec 2025 (estimated)
The present invention relates to an orthogonal frequency division multiplexing Access (OFDMA) radio access system, and more particularly, to supporting a hybrid automatic retransmission request (HARQ) in the OFDMA radio access system. Although the present invention is suitable for a wide scope of applications, it is particularly suitable for reducing overhead generated from the retransmission despite the non-existence of transmission error if a signal is transmitted via a plurality of antennas via the same uplink or downlink data burst when using a multi-antenna system in the OFDMA radio access system supporting the HARQ.
Generally, an automatic repeat request (ARQ) is a response message notified by a receiving side to a transmitting side after receiving the data transmitted from the transmitting side. The ARQ informs the transmitting side whether the data was correctly received. Furthermore, the ARQ can be classified into three systems, as shown in FIGS. 1A to 1C, respectively.
FIG. 1A shows a ‘stop-and-wait’ ARQ system, in which a transmitting side waits after data transmission to receive an ACK or NACK message. The transmitting side then sends new data or retransmits former data.
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. Features, elements, and aspects of the invention that are referenced by the same numerals in different figures represent the same, equivalent, or similar features, elements, or aspects in accordance with one or more embodiments.
FIGS. 1A to 1C illustrate different types of automatic repeat request (ARQ) systems in accordance with the related art.
FIGS. 2 to 5 illustrate the features of the different types of ARQ systems in accordance with the related art.
The present invention relates to supporting hybrid automatic retransmission request (HARQ) in an orthogonal frequency division multiplexing access (OFDMA) radio access system. Specifically, the present invention relates to transmitting packet data in a wireless communication system configured to support multiple input and multiple output.
Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.
The present invention discloses a method for sending an ACK or NACK signal per layer when a multi-antenna system is applied to an uplink or downlink data burst. In other words, ACK/NACK signal transport channels amounting to the number of layers allocated to the data burst are allocated to the uplink or downlink data burst having the multi-antenna system applied thereto.