Method for scheduling resource, network element and user equipment

Abstract

The present invention proposes a method for scheduling resource in a packet network and a network element for exchanging signaling with user equipments, wherein user equipments communicate therebetween using the resource allocated by network elements, said communication comprises talk-spurt periods during which data packets are transmitted and silent periods during which silence descriptor packets are transmitted, said method for scheduling resource comprising: said network element allocates resource for said user equipments for communication; both said user equipment and said network element detect the presence of said silence descriptor packet, and said network element determines the optimized number of resource unit(s) to be allocated to said user equipment during the interval for transmitting said data packet, based on the coding rate of said user equipment, the selected modulation coding scheme and the valid transmission times; the network element starts timing and the user equipment stops using the allocated resource if a silence descriptor packet is detected; when the timing finishes or a request for allocating resource is received from the user equipment before the end of said timing, said network element allocates the determined optimized number of resource unit(s) to said user equipment, and said user equipment begins to use said determined optimized number of resource unit(s); said network element determines the end of the interval for transmitting said data packet by detecting the silence descriptor packet.; and when both said user equipment and said network element detect a silence descriptor packet, said user equipment stops using said determined optimized number of resource unit(s), while said network element releases said determined optimized number of resource unit(s).

Description

technical field [0001] The present invention relates to the field of communications, in particular to a technology for scheduling resources in a packet network. Background technique [0002] In recent years, broadband wireless access technologies represented by IEEE 802.16e have received extensive attention, especially their higher data rates and support for mobility, which form a competition for existing mobile communication systems. To this end, 3GPP launched a 3G long-term evolution research project in 2005, namely LTE (Long Term Evolution), with evolved access technology (E-UTRA, Evolved-UTRA) and access network (E-UTRAN), for The growing demands of operators and users provide better support to achieve the goal of maintaining the advantages of the UMTS system for the next 10 years or more. [0003] figure 1 The architecture of the R7 version of the LTE network is shown. The bottom layer between eNodeBs (EvolvedUniversal Terrestrial Radio Access Network NodeBs) adopts ...

AI Technical Summary

Problems solved by technology

But this method has the following disadvantages: i) the wireless resources cannot be managed effectively due to the difficulty in estimating the average activity factor, which will result in (in the absence of resources) additional voice packet delay or (in the case of excess resources ii) lack of flexibility, multi-rate codecs cannot be effectively supported in a UE group, and UE switching between groups or group reconfiguration is quite complicated and requires a large number of RRC (Radio Resource Control) signals Therefore, the best performance can only be achieved when the UE group is full, so the group scheduling performance is lower in the initial warm-up phase; iii) A different control channel structure is required than the standard L1 / L2 control channel, such as BITMAP per TTI ( bitmap) signaling

Therefore, unused reserved transmission resources are wasted

For low-rate voice services, the average number of retransmissions is less than 1, so at least 2 reserved resources are wasted every 20 ms

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