Method for adjusting uplink and downlink time allocation, system, local-side equipment and customer?premise?equipment (CPE)

A technology of central office equipment and line time, applied in the field of communication, can solve the problem of low utilization rate of transmission opportunities and time, achieve the effect of improving the utilization rate of transmission resources and improving system performance

Active Publication Date: 2014-03-12
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention provides a method, system, central office equipment and user terminal equipment for adjusting uplink and downlink time allocation, so as to at least solve the problem in related technologies that due to the constant change of uplink and downlink data flow of each user, the actual data transmission time may not be Occupies the entire transmission opportunity, so there may be a problem of low time utilization of the transmission opportunity

Method used

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  • Method for adjusting uplink and downlink time allocation, system, local-side equipment and customer?premise?equipment (CPE)
  • Method for adjusting uplink and downlink time allocation, system, local-side equipment and customer?premise?equipment (CPE)
  • Method for adjusting uplink and downlink time allocation, system, local-side equipment and customer?premise?equipment (CPE)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] In the next-generation digital subscriber line G..fast system, the schematic diagram of adjusting the uplink and downlink time allocation method is as follows Figure 11 The numbers of transmission opportunities and guard intervals in the figure are for illustration only. The implementation process of this method is as follows:

[0083] (1) At the initial moment, all link building CPEs start to transmit uplink data to the central office equipment.

[0084] (2) The central office equipment starts to receive the uplink data of all link-building CPEs. Among them, the time required for uplink transmission cannot exceed the threshold value T max , the threshold can be preset on the CPE and can be adjusted.

[0085] During implementation, due to the difference in the uplink data traffic of each link-building CPE, the time length of uplink transmission is also different. Figure 11 The shaded area shown in indicates no data transmission.

[0086] (3) After the uplink data...

Embodiment 2

[0093] The schematic diagram of the G.fast system to adjust the uplink and downlink time allocation method is as follows Figure 12 The numbers of transmission opportunities and guard intervals in the figure are for illustration only. The implementation process of this method is as follows:

[0094] (1) At the initial moment, the central office equipment determines the optimal downlink transmission opportunity time T of the system according to the downlink data flow of each link ds . It is required that the downlink transmission time of each link cannot exceed T max (The threshold value system will be preset on the central office equipment and can be adjusted), so the optimal value will not exceed T max .

[0095] Among them, the calculation principle of the optimal value is as follows: balance the downlink transmission time and data flow of each channel, so as to maximize the overall time utilization. During implementation, it can be determined according to the following...

Embodiment 3

[0103] The schematic diagram of the G..fast system to adjust the uplink and downlink time allocation method is as follows Figure 13 The numbers of transmission opportunities and guard intervals in the figure are for illustration only. The method is described as follows:

[0104] (1) At the initial moment, the central office device first sends the same MAP message to all CPEs that have established a link. The message can be in the form of broadcast or unicast or embedded in the frame header of the downlink data packet.

[0105] Wherein, the MAP message mainly includes: the time of the uplink transmission opportunity or the downlink transmission opportunity, or the end time of the uplink transmission, or the start time of the downlink transmission in the uplink and downlink cycle to be transmitted.

[0106] The time of the uplink and downlink transmission opportunities in the first MAP message is the initial value of the system, where the uplink transmission time is T us0 , t...

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Abstract

The invention discloses a method for adjusting uplink and downlink time allocation, a system, local-side equipment and customer?premise?equipment (CPE). The method comprises the following steps that: the local-side equipment determines uplink and downlink time allocation information of each link inside the same coordination group according to uplink and/or downlink transmission information of each link in the same coordination group; and the local-side equipment embeds the uplink and downlink time allocation information to downlink frames of each link inside the same coordination group in the same manner, or embeds the uplink and downlink time allocation information to the downlink frames of each link inside the same coordination group in a one-time manner or repeatedly according to a link environment. By means of the method for adjusting the uplink and downlink time allocation, the system, the local-side equipment and the customer?premise?equipment (CPE) of the invention, the local-side equipment can transmit the uplink and downlink time allocation information to user equipment through a reliable method, such that the system can adapt to link data flow and dynamically adjust the allocation of transmission resources, and therefore, the utilization rate of the transmission resources can be improved.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a method for adjusting uplink and downlink time allocation, a next-generation digital subscriber line system, central office equipment, and customer premise equipment (Customer Premise Equipment, CPE for short). Background technique [0002] Digital Subscriber Line (DSL) technology can provide voice, video and data services on ordinary twisted-pair wire pairs. With the characteristics of high-speed access, low maintenance overhead, full utilization of existing networks and security, it has become one of the most promising and competitive technologies. [0003] DSL technology has developed to Very high bit-rate Digital Subscriber Line (VDSL for short) version 2, and the potential of twisted pair has not been fully tapped. The latest G.fast technology can provide data transmission with a net rate of up to 500Mbps on the twisted pair by expanding the frequency spectrum. This sta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/00H04L5/14H04L1/00
CPCH04L5/1469H04L5/0053H04L1/00H04L5/00H04L5/0092H04L5/14
Inventor 程明明张伟良袁立权沈天光
Owner ZTE CORP
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