METHOD, DEVICE, AND SYSTEM FOR TRANSMITTING DATA BASED ON HARQ
First Claim
1. A method for transmitting data based on a hybrid automatic repeat request (HARQ), the method comprising:
- adjusting, according to current physical resources, a channel quality indicator (CQI) fed back by a terminal to obtain an adjusted CQI;
determining an initial transmit power corresponding to the adjusted CQI;
calculating an optimum number NRV of redundant versions (RVs) according to the adjusted CQI, a requirement on quality of service of the terminal, and a signal-to-noise ratio (SNR) gain when a base station performs transmission by using an HARQ, wherein the SNR gain is determined according to a ratio of an SNR when the base station performs transmission without using the HARQ to an SNR when the base station performs transmission by using the HARQ, the optimum number NRV is the number of RVs required by the base station to send a transport block (TB) to the terminal, and the optimum number NRV is a natural number;
adjusting the initial transmit power according to the optimum number NRV and the adjusted CQI to obtain an adjusted transmit power; and
sending NRVs of the TB to the terminal by using NRV transmission time intervals (TTIs) and the adjusted transmit power.
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Accused Products
Abstract
Embodiments of the present invention provide a method, a device, and a system for transmitting data based on a hybrid automatic repeat request (HARQ). The method includes: adjusting, according to current physical resources, a channel quality indicator (CQI) fed back by a terminal to obtain an adjusted CQI and determining an initial transmit power corresponding to the adjusted CQI; calculating an optimum number NRV of redundant versions (RVs) according to a signal-to-noise ratio (SNR) gain, the adjusted CQI, and a requirement on quality of service of the terminal; adjusting the initial transmit power according to the optimum number of RVs and the adjusted CQI; and using NRV transmit time intervals (TTIs) and the adjusted transmit power to transmit NRV RVs of a transport block (TB) to the terminal. The embodiments of the present invention further provide a base station, a terminal, and a system for transmitting data.
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Citations
16 Claims
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1. A method for transmitting data based on a hybrid automatic repeat request (HARQ), the method comprising:
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adjusting, according to current physical resources, a channel quality indicator (CQI) fed back by a terminal to obtain an adjusted CQI; determining an initial transmit power corresponding to the adjusted CQI; calculating an optimum number NRV of redundant versions (RVs) according to the adjusted CQI, a requirement on quality of service of the terminal, and a signal-to-noise ratio (SNR) gain when a base station performs transmission by using an HARQ, wherein the SNR gain is determined according to a ratio of an SNR when the base station performs transmission without using the HARQ to an SNR when the base station performs transmission by using the HARQ, the optimum number NRV is the number of RVs required by the base station to send a transport block (TB) to the terminal, and the optimum number NRV is a natural number; adjusting the initial transmit power according to the optimum number NRV and the adjusted CQI to obtain an adjusted transmit power; and sending NRVs of the TB to the terminal by using NRV transmission time intervals (TTIs) and the adjusted transmit power. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for transmitting data based on a hybrid automatic repeat request (HARQ), comprising:
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receiving an adjusted channel quality indicator (CQI) and an initial transmit power corresponding to an adjusted CQI, wherein the adjusted CQI and the initial transmit power are sent by a base station, and the adjusted CQI is obtained by the base station after adjusting a measured CQI according to current physical resources; receiving an optimum number NRV of redundant versions (RVs) calculated by the base station and an adjusted transmit power, wherein the optimum number NRV of RVs is calculated and obtained by the base station according to the adjusted CQI, requirements on quality of service of a terminal, and a signal-to-noise ratio (SNR) gain when the base station performs transmission by using an HARQ, the adjusted transmit power is obtained by the base station by adjusting the initial transmit power according to the optimum number NRV of RVs and the adjusted CQI, the SNR gain is determined according to a ratio of an SNR when the base station performs transmission without using the HARQ to an SNR when the base station performs transmission by using the HARQ, the optimum number NRV of RVs is the number of RVs required by the base station to send a transport block (TB) to the terminal, and NRV is a natural number; and sending the optimum number NRV of RVs of the TB to the base station by using NRV transmission time intervals (TTIs) and the adjusted transmit power. - View Dependent Claims (8)
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9. A base station, comprising:
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a channel quality indicator (CQI) adjusting module configured to adjust, according to current physical resources, a CQI fed back by a terminal to obtain an adjusted CQI and determine an initial transmit power corresponding to the adjusted CQI; a calculating module configured to calculate an optimum number NRV of redundant versions (RVs) according to the adjusted CQI, requirements on quality of service of the terminal, and a signal-to-noise ratio (SNR) gain when the base station performs transmission by using a hybrid automatic repeat request (HARQ), wherein the SNR gain is determined according to a ratio of an SNR when the base station performs transmission without using the HARQ to an SNR when the base station performs transmission by using the HARQ, the optimum number NRV of RVs is the number of RVs required by the base station to send a transport block (TB) to the terminal, and NRV is a natural number; a power adjusting module configured to adjust the initial transmit power according to the optimum number NRV of RVs and the adjusted CQI to obtain the adjusted transmit power; and a downlink transmission module configured to send the optimum number NRV of RVs of the TB to the terminal by using NRV transmission time intervals (TTIs) and the adjusted transmit power. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A terminal, comprising:
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a first receiving module configured to receive an adjusted channel quality indicator (CQI) and an initial transmit power corresponding to the adjusted CQI, wherein the adjusted CQI and the initial transmit power are sent by a base station, and the adjusted CQI is obtained by the base station after adjusting a measured CQI according to current physical resources; a second receiving module configured to receive the optimum number NRV of redundant versions (RVs) calculated by the base station and adjusted transmit power, wherein the optimum number NRV of RVs is calculated and obtained by the base station according to the adjusted CQI, requirements on quality of service of the terminal, and a signal-to-noise ratio (SNR) gain when the base station performs transmission by using a hybrid automatic repeat request (HARQ), the adjusted transmit power is obtained by the base station by adjusting the initial transmit power according to the optimum number NRV of RVs and the adjusted CQI, the SNR gain is determined according to a ratio of an SNR when the base station performs transmission without using the HARQ to an SNR when the base station performs transmission by using the HARQ, the optimum number NRV of RVs is the number of RVs required by the base station to send a transport block (TB) to the terminal, and NRV is a natural number; and an uplink transmission module configured to send NRV RVs of the TB to the base station by using NRV transmission time intervals (TTIs) and the adjusted transmit power. - View Dependent Claims (16)
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Specification