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Base station, user device, and method

A technology for user devices and base stations, applied in the field of base stations and user devices, can solve problems such as inability to receive packet data units well

Inactive Publication Date: 2009-06-24
NTT DOCOMO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As above, it is assumed that packet data units #1, #3, and #5 are well received at the base station, but packet data units #2, #4 cannot be well received

Method used

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  • Base station, user device, and method
  • Base station, user device, and method
  • Base station, user device, and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Figure 4 It is a functional block diagram of a base station showing an embodiment of the present invention. exist Figure 4 Shown in the receiving amplification unit 402, CQI processing unit 404, metric (metric) processing unit 406, measurement report (measurement report) processing unit 408, scheduler 410, transmission buffer 412, transmission signal processing unit 414, HARQ buffer 416 and transmit amplifier 418 .

[0061] The reception amplifier unit 402 receives the uplink signal from the mobile station in synchronization with it.

[0062] The CQI processing unit 404 extracts information indicating CQI from the received signal. In the present embodiment, the CQI is a value expressed by, for example, 32-layer level coding of the measured value of the received SIR of the user equipment. CQI can also be represented by other various methods known in the technical field. Instantaneous CQIs reported from user devices may be averaged.

[0063] The metric processing ...

Embodiment 2

[0101] Matters related to the downlink were described in the first embodiment. In the second embodiment of the present invention, matters related to uplink will be described.

[0102] Figure 7 An example of the operation of this embodiment is shown. roughly executes with the Image 6 The same actions as those already described in . In this embodiment, after the user equipment performing uplink data transmission reports the measurement report to the source base station in step S12 and before it responds to the handover command in step S20, it performs "priority processing" in step S19.

[0103] In the "priority process" of step S19, the user device executes one or more of the following action items.

[0104] (A) The user apparatus requests the base station to transmit the service data unit (SDU) waiting for transmission in the transmission buffer prior to the data of other user apparatuses due to the intention of handover. Specifically, the user equipment requests the bas...

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Abstract

A base station comprises a transmission buffer configured to store a service data unit received from the access gateway; a retransmission buffer configured to store a packet data unit to be retransmitted in a radio downlink; a scheduler configured to determine assignment of radio resources to user apparatuses and supply scheduling information; and a transmitted signal processing unit configured to generate a transmitted signal including data stored in the transmission buffer or the retransmission buffer in-accordance with the scheduling information. The scheduler is configured to determine the scheduling information to transmit data destined for a user apparatus requesting handover in priority to data destined for a user apparatus that does not request handover.

Description

technical field [0001] The present invention generally relates to the technical field of mobile communication, and particularly relates to a base station, a user device and a method used in a communication system including an access gateway and a wireless access network. Background technique [0002] In this technical field, research and development on next-generation mobile communication systems are being accelerated under 3GPP. [0003] figure 1 Shows the outline of the communication system. exist figure 1 Denotes an access gateway (aGW) 11 , base stations (eNB) 12 and 13 connected to the access gateway via an interface S1 , and user equipment (UE) 14 performing wireless communication with the base stations 12 and 13 . Access Gateway (aGW) may also be called Mobility Management Entity / Serving Gateway (MME / S-GW). The user equipment is typically a mobile station. The base stations are connected to each other via the interface x2. In the illustrated example, a case wher...

Claims

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Application Information

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IPC IPC(8): H04W72/10H04W36/02H04W80/04
CPCH04W72/10H04W36/02H04W80/04H04W72/56H04W72/1273
Inventor 岩村干生
Owner NTT DOCOMO INC
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