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    • 5. 发明授权
    • Asymmetric rate feedback and adjustment system for wireless communications
    • 无线通信的非对称速率反馈和调整系统
    • US07009949B1
    • 2006-03-07
    • US09716106
    • 2000-11-17
    • Nandu GopalakrishnanTeck H. HuFarooq Ullah KhanAchilles George KogiantisPantelis MonogioudisAshwin Sampath
    • Nandu GopalakrishnanTeck H. HuFarooq Ullah KhanAchilles George KogiantisPantelis MonogioudisAshwin Sampath
    • H04Q7/00
    • H04L1/0027H04L1/0002H04L1/0025
    • A rate feedback and adaptation scheme or system uses a rate of rate feedback asymmetrical with the rate of data rate adaptation. In particular, the rate adaptation system provides a rate of rate feedback slower than the rate of rate adaptation. Thus, by allowing the base station to change the data rate more frequently than the individual wireless units reports the rate information, the rate adaptation system can provide improved flexibility and more efficient use of wireless resources while reducing the processing and transmission overhead required to report the rate information. For example, every 3 slots, a wireless unit can calculate and report a rate for the wireless unit to use on a shared channel to send data. The base station receives the rates from the wireless units seeking to send data over the shared channel and selects a wireless unit to use the shared channel. If the base station can adapt the data rate every slot, the base station can adapt the data rate in accordance with a rate reported by another wireless unit, thereby improving system performance. Because of the small slot duration (for example, 0.67 microseconds), the relatively reduced rate of reporting should not adversely effect system performance since it is highly unlikely that the achievable data rate will change over a period of a slot under most operating conditions.
    • 速率反馈和适应方案或系统使用速率反馈速率与数据速率适配速率不对称。 特别地,速率适配系统提供比速率适应速率慢的速率反馈速率。 因此,通过允许基站比各个无线单元报告速率信息更频繁地改变数据速率,速率适配系统可以提供改进的灵活性和更有效地使用无线资源,同时减少报告所需的处理和传输开销 费率信息。 例如,每3个时隙,无线单元可以计算和报告无线单元在共享信道上使用的速率来发送数据。 基站从寻求通过共享信道发送数据的无线单元接收速率,并选择无线单元以使用共享信道。 如果基站能够适应每个时隙的数据速率,则基站可以根据另一无线单元报告的速率来调整数据速率,从而提高系统性能。 由于小时隙持续时间(例如,0.67微秒),相对较低的报告速率不应对系统性能产生不利影响,因为在大多数操作条件下,可实现的数据速率在一段时间内将不可能改变。