Method for dynamic resource allocation of uplink and downlink in OFDMA/TDD cellular system
First Claim
1. A method for dynamic resource allocation of downlink in an OFDMA/TDD cellular system, the method comprising the steps of:
- selecting a user through a GPF algorithm;
performing dynamic channel allocation through an ASA (Aggressive Sub-channel Allocation) algorithm so as to perform a FASA (Fairness insured Aggressive Sub-channel Allocation) algorithm for obtaining a multiuser diversity gain; and
performing dynamic power allocation through an improved CHC (Chang, Heo and Cha) algorithm, in consideration of a data rate provided to each user and a channel state,wherein the performing of the dynamic channel allocation includes the steps of;
searching for sub-channels which can guarantee the highest data rate to the selected user, among sub-channels which are not allocated to other users;
calculating data rates which the sub-channels can guarantee to another user; and
comparing the calculated data rates, and then allocating a sub-channel, which provides the smallest data rate to another user among the searched sub-channels, to the selected user,wherein in the calculating of the data rates, the data rates are calculated by using an equation;
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Abstract
Provided is a method for dynamic resource allocation of uplink and downlink in an OFDMA/TDD cellular system. The method for dynamic resource allocation of uplink in an OFDMA/TDD cellular system includes the steps of determining the number of sub-channels which can be allocated to each user through an FLR algorithm; performing channel allocation for a first frame through a round-robin algorithm in which channel information is not needed; performing dynamic channel allocation for a next frame through uplink channel information measured by uplink channel sounding; and performing power control. The method for dynamic resource allocation of downlink in an OFDMA/TDD cellular system includes the steps of selecting a user through a GPF algorithm; performing dynamic channel allocation through an ASA algorithm so as to perform a FASA algorithm for obtaining a multiuser diversity gain; and performing dynamic power allocation through an improved CHC algorithm, in consideration of a data rate provided to each user and a channel state.
28 Citations
7 Claims
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1. A method for dynamic resource allocation of downlink in an OFDMA/TDD cellular system, the method comprising the steps of:
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selecting a user through a GPF algorithm; performing dynamic channel allocation through an ASA (Aggressive Sub-channel Allocation) algorithm so as to perform a FASA (Fairness insured Aggressive Sub-channel Allocation) algorithm for obtaining a multiuser diversity gain; and performing dynamic power allocation through an improved CHC (Chang, Heo and Cha) algorithm, in consideration of a data rate provided to each user and a channel state, wherein the performing of the dynamic channel allocation includes the steps of; searching for sub-channels which can guarantee the highest data rate to the selected user, among sub-channels which are not allocated to other users; calculating data rates which the sub-channels can guarantee to another user; and comparing the calculated data rates, and then allocating a sub-channel, which provides the smallest data rate to another user among the searched sub-channels, to the selected user, wherein in the calculating of the data rates, the data rates are calculated by using an equation; - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification