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Multi-subframe uplink scheduling method for time division multiplexing system

A technology of time-division multiplexing system and scheduling method, applied in the field of multi-subframe uplink scheduling, to achieve the effect of saving time-frequency resources and increasing the number

Inactive Publication Date: 2010-06-09
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the UE occupies two uplink subframes at the same time in most cases, and the eNodeB (Node B, ie base station) wants to schedule more UEs, this method will greatly reduce the available resources for downlink authorization

Method used

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  • Multi-subframe uplink scheduling method for time division multiplexing system
  • Multi-subframe uplink scheduling method for time division multiplexing system
  • Multi-subframe uplink scheduling method for time division multiplexing system

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Embodiment Construction

[0051] The basic idea of ​​the present invention is: eNodeB according to N g value, the number of uplink users actually scheduled by the downlink subframe N UE And the specific transmission characteristics of uplink users (for example, the number of uplink subframes occupied by uplink users), determine the number of PHICH resources that need to be reserved in downlink subframes, and feedback in downlink bundling-A / N (bundling ACK / NACK feedback) mode and downlink multi-A / N feedback mode, select an ACK / NACK feedback mode, and notify the UE of the selected ACK / NACK feedback mode, so as to reduce the time-frequency resources used for PHICH transmission in downlink subframes or increase The number of schedulable uplink users.

[0052] The multi-A / N feedback method refers to: the downlink subframe performs A / N feedback on the two uplink subframes scheduled at the same time (that is, feedbacks 2 A / N); the bundling-A / N feedback method refers to: the downlink A subframe only feeds ba...

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Abstract

The invention discloses a multi-subframe uplink scheduling method of a time division multiplexing system. The method comprises the following steps that: when a grouping factor Ng of a PHICH is equal to 1, a base station reserves N PHICH groups in a downlink subframe, selects a downlink feedback mode from a multi-ACK / NACK feedback mode and a bundling-ACK / NACK feedback mode according to the number of uplink users NUE to be scheduled currently and / or the number of the uplink users using 1 or 2 uplink subframes for data transmission in the NUE uplink users, and informs each uplink user to be scheduled of the selected downlink feedback mode through an uplink scheduling authority, wherein the N rounds up a result obtained by dividing a product of the Ng and an NRB by 8 and the NRB represents the number of downlink resource blocks. Due to the adoption of the method, time frequency resource which is in the downlink subframe and is used for PHICH transmission can be saved.

Description

technical field [0001] The invention relates to the communication field, in particular to a multi-subframe uplink scheduling method of a time division multiplexing system. Background technique [0002] In the LTE (Long Term Evolution, long-term evolution) FDD / TDD (Frequency Division Duplex / Time Division Duplex, frequency division duplex / time division duplex) system, the downlink control channel is located in the first n OFDM (Orthogonal Frequency Division Multiplexing, orthogonal frequency Division multiplexing) symbol, where n≤3. The downlink control channel consists of the following information: [0003] PCFICH (Physical Control Format Indication Channel, physical control format indication channel): used to notify the size of n, expressed in 2bits (bits); [0004] PHICH (Physical Hybrid ARQ Indicator Channel, Physical Hybrid ARQ Indicator Channel): used to carry downlink ACK / NACK (ACKnowledgment / Negative ACKnowledgment, acknowledgment / negative acknowledgment, hereinafter...

Claims

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Application Information

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IPC IPC(8): H04L1/18H04L1/16H04L5/26
Inventor 袁明毕峰苟伟韩小江米德忠
Owner ZTE CORP
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