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Resource allocation method of retransmitted data block in HSDPA (High Speed Downlink Packet Access) scheduling

A technology for data retransmission and resource allocation, which is applied in the field of data retransmission and can solve the problems of limited improvement of HSDPA data block decoding accuracy and no consideration of channel characteristics.

Inactive Publication Date: 2013-03-06
TD TECH COMM TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The above method of retransmitting data blocks does not consider the influence of channel characteristics, and uses the same power resource, same time slot resource, same channel resource and same modulation method as when transmitting data block for the first time, so for HSDPA data block translation The improvement of code correctness is relatively limited

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  • Resource allocation method of retransmitted data block in HSDPA (High Speed Downlink Packet Access) scheduling
  • Resource allocation method of retransmitted data block in HSDPA (High Speed Downlink Packet Access) scheduling
  • Resource allocation method of retransmitted data block in HSDPA (High Speed Downlink Packet Access) scheduling

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Embodiment Construction

[0057] In order to make the purpose, technical means and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0058] In order for a data block to be correctly received by the UE, when the UE receives the data block, the Eb / N0 of the data block should not be less than the expected Eb / N0. Among them, Eb represents the energy of each information bit in the data block, N0 represents the noise power spectral density, and the expected Eb / N0 depends on the wireless channel characteristics when the UE receives the data block, that is, the wireless channel when the NodeB sends the data block. channel characteristics.

[0059] As described in the background art, after retransmission of the data block, the UE combines the bit sequence of the received retransmitted data block with the previously received data block, and then uses the combined result for decoding. Therefore, in order t...

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Abstract

The invention discloses a resource allocation method of a retransmitted data block in HSDPA (High Speed Downlink Packet Access) scheduling, comprising the following steps of: when a NodeB receives scheduled HS-SICH (High Speed Shared Indication Control Channel) carrying with a NACK (Negative Acknowledgement) bit in an nth subframe, determining a data block needing to retransmit an n-2 subframe to a UE (User equipment) by using the NodeB, wherein the scheduled HS-SICH is transmitted by the UE; calculating the expected Eb / N0 of each information bit under the current wireless channel by utilizing the NodeB according to the received CQI (Channel Quality Indicator) information; then determining the Eb / N0 required for each information bit according to the expected Eb / N0 when retransmitting the data block; and allocating a HS-PDSCH resource to the retransmitted data block according to the determined Eb / N0 required for each information bit. The method can raise the correct receiving probability of the retransmitted data block and improve the receiving performance of HSDPA data.

Description

technical field [0001] The invention relates to data retransmission technology, in particular to a resource allocation method for retransmission data blocks in HSDPA scheduling. Background technique [0002] In the HSDPA of the TD-SCDMA system, in each subframe "n", the scheduler of the NodeB must perform a scheduling, determine the scheduled UE through scheduling, and allocate the scheduled HS-PDSCH resource for each scheduled UE , used to send the HSDPA data block of the UE. [0003] In the scheduling process of each subframe, it is necessary to determine the HSDPA UE ID, the scheduled HS-SCCH and the scheduled HS-SICH paired with it, the scheduled HS-PDSCH resources, and the HS-PDSCH used for each successfully scheduled UE. Modulation mode, HS-DSCH control information (data transmitted on the scheduled HS-SCCH), and the timing relationship among the scheduled HS-SCCH, HS-PDSCH and HS-SICH. Wherein, the scheduled HS-PDSCH resources include time slots allocated to the sch...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/08H04W72/12H04L1/18H04L1/16H04L1/00H04W72/54
Inventor 魏立梅佟学俭邢立军
Owner TD TECH COMM TECH LTD
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