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Data transmission method, system and device

A data transmission method and data volume technology, applied in the field of systems and equipment, and data transmission methods, can solve problems such as waste of air interface resources, errors, and reduced reliability of business data transmission, so as to reduce waste, reduce probability, and improve reliability sexual effect

Active Publication Date: 2014-04-16
DATANG MOBILE COMM EQUIP CO LTD
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Problems solved by technology

It can be seen from Table 5 that when the two PRB pairs allocated by the eNodeB scheduler are both punctured PRB pairs (the above situation will definitely occur when the bandwidth is 1.4M and the subframe is 0), the actual code rates are all If it is greater than 0.93, or even greater than 1, the detection performance of the UE on service data is degraded or even errors occur, which greatly reduces the reliability of service data transmission, and the HARQ retransmission caused by errors greatly wastes air interface resources

Method used

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  • Data transmission method, system and device
  • Data transmission method, system and device
  • Data transmission method, system and device

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Embodiment 1

[0102] In this embodiment, the downlink data transmission is taken as an example, such as Figure 6A As shown, the specific steps are as follows:

[0103] start:

[0104] Step 61: eNodeB determines the target spectral efficiency η of the current UE Target , for LTE downlink, is the spectral efficiency determined by the CQI reported by the UE; for LTE uplink, is the spectral efficiency obtained by measuring the uplink SRS signal by the base station;

[0105] Step 62: eNodeB according to η Target and the amount of data to be transmitted TBS init Determine the number of PRBs that need to be allocated as N PRB，all_normal (assuming that all allocated PRB pairs are regular PRB pairs);

[0106] Step 63: Considering that the allocated PRBs contain some or all punctured PRB pairs, the eNodeB adjusts the actually used spectral efficiency to be η used , and increasing N PRB，add PRBs (the total number of allocated PRBs is N PRB，used =N PRB，all_normal +N PRB，add ), to ensure tha...

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Abstract

The invention discloses a data transmission method, a data transmission system and a data transmission device, which relate to the field of wireless communication, and are used for enhancing the reliability of data transmission and saving air interface resources. In the invention, a base station allocates a physical resource block (PRB) to a terminal according to the current to-be-transmitted data volume and the target spectral efficiency required to be achieved by data transmission, then the PRB is taken as a first PRB; an added PRB is allocated to the terminal, and the added allocated PRB is taken as a second PRB; and downlink data corresponding to the data volume is transmitted to the terminal by using the first PRB and the second PRB, or the terminal is indicated to transmit uplink data corresponding to the data volume to the data station by using the first PRB and the second PRB. By using the method, system and device disclosed by the invention, the reliability of data transmission can be enhanced effectively, the retransmission probability of HARQ (hybrid automatic repeat requests) can be reduced, and the waste of air interface resources can be reduced effectively.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a data transmission method, system and equipment. Background technique [0002] In a Long Term Evolution (LTE) system, a Physical Radio Resource Block (PRB) is a basic resource allocation unit, and is used for resource allocation of a Physical Downlink Shared Channel (PDSCH) and a Physical Uplink Shared Channel (PUSCH). A PRB is defined as N in the time domain symb UL Consisting of consecutive Orthogonal Frequency Division Multiplexing (OFDM) symbols and N in the frequency domain sc RB consecutive subcarriers. Downlink N in LTE system symb UL and N sc RB The value of is given in Table 1. It can be known from Table 1 that, under a normal CP, a normal PRB includes 84 resource elements (REs), and a normal PRB pair (PRB Pair) includes 168 REs. Among them, an example of a PRB and a PRB pair is as figure 1 shown. [0003] Table 1 [0004] [0005] When det...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/04H04W88/08
Inventor 任斌李琼韩波
Owner DATANG MOBILE COMM EQUIP CO LTD
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