CAJ | 학술논문

采用改进的贪婪算法分配时隙的无线资源,根据用户业务的QoS和数据队列信息确定用户的优先权,并在获知信道状态信息条件下,按照传输比特消耗功率最小原则搜索所有子载波信道,为用户动态分配子载波和比特.仿真结果表明,在两种传输速率要求下,当接入用户数相同时,改进算法比传统贪婪算法减少功率消耗3.9622W;改进算法多消耗1.9858W功率却增加了2个接入用户,用户消耗平均功率比前者少2.2456W/用户.
채용개진적탐람산법분배시극적무선자원,근거용호업무적QoS화수거대렬신식학정용호적우선권,병재획지신도상태신식조건하,안조전수비특소모공솔최소원칙수색소유자재파신도,위용호동태분배자재파화비특.방진결과표명,재량충전수속솔요구하,당접입용호수상동시,개진산법비전통탐람산법감소공솔소모3.9622W;개진산법다소모1.9858W공솔각증가료2개접입용호,용호소모평균공솔비전자소2.2456W/용호.
In this paper, improved greedy algorithm was used to allocate radio resource at one slot based on limited radio resource. User’s priority was confirmed according to user’s quality of service and data queue information. Under the condition of knowing channel state information, subcarriers and bits were dynamically allocated to user according to priority, after searching all subcarrier channels on the basis of minimum transmitted power. Simulation results show that under the condition of two kinds of bit rate, when the same number of users were accessed in system, the proposed algorithm consumed power 3.9622W less than traditional greedy algorithm;the improved algorithm consumed power 1.9858W more than previous algorithm, but two more users were accessed. The average power that was consumed by users was 2.2456W/user less than former algorithm.