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Method and system for wireless resource allocation among nodes

A technology of wireless resources and allocation method, applied in the field of communication, can solve the problems of macro base station not being able to perceive the service rate of small base station terminals in real time, consuming signaling resources, reducing users and network throughput, etc.

Active Publication Date: 2019-02-22
CHINA TELECOM CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the discussion of 3GPP, the bearer transfer between the macro base station and the small base station mainly uses the handover mechanism, but there are still some problems in this process that need to be solved through standardization or implementation by manufacturers:
[0003] Question 1: Which bearers are selected by the macro base station to be offloaded to the small base station
However, in the traditional handover mechanism, the source cell cannot estimate the rate of the bearer in the target cell
[0005] Question 2: Reasonable allocation of UE-AMBR between macro base stations and small base stations
[0006] The core network needs to assign an NGBR service rate limit UE-AMBR (UE AggregateMaximum Bit Rate, the maximum rate of user aggregation) to a single terminal. In the dual connection scenario, since there are two transmission nodes, the two nodes need to share this rate limit. information, but unreasonable UE-AMBR allocation will reduce the throughput of users and the network
[0007] Question 3: When does the bearer accepted by the small base station need to be switched back to the macro base station
[0008] exist figure 1 In the architecture shown, the macro base station cannot perceive the service rate of the terminal on the small base station in real time, but if the measurement and reporting method based on the terminal in the traditional handover mechanism is adopted, or the small base station exchanges service rate information with the macro base station through the X2 interface , will consume a lot of signaling resources and is also very imprecise

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  • Method and system for wireless resource allocation among nodes
  • Method and system for wireless resource allocation among nodes
  • Method and system for wireless resource allocation among nodes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0227] This embodiment mainly describes the process of offloading the FTP service to the small base station after the terminal moves to the coverage area of ​​the small base station. The network topology is as follows: Figure 5shown. The terminal has two services, one is E-RAB1, and the service type of this bearer is HTTP, and the other is E-RAB2, and the service type of this bearer is FTP. Among them, E-RAB2 is a bearer with high-speed requirements. The minimum target rate set by the network management side is 8Mbps downlink and 1Mbps uplink. The current service rate of E-RAB2 in the macro base station is 1Mbps downlink and 300Kps uplink. The frequency point used in the macro base station is F1, and the frequency point used in the small base station is F2.

[0228] Step 1: The terminal reports the measurement result of frequency point F2 for the small base station according to the inter-frequency measurement configured by the macro base station. The macro base station finds...

Embodiment 2

[0239] This embodiment mainly describes the process of offloading the FTP service to the macro base station after the terminal leaves the coverage area of ​​the small base station. The network topology is as follows: Figure 5 shown. The terminal has two services, one is E-RAB1, the service type of this bearer is HTTP, and the service is served by the macro base station, and the other is E-RAB2, the service type of the bearer is FTP, and the bearer is served by the small base station . The frequency point used in the macro base station is F1, and the frequency point used in the small base station is F2.

[0240] Step 1: The small base station finds that the current spectral efficiency of the terminal is lower than the threshold TH3 through monitoring the spectrum efficiency of the terminal, and considers that the terminal is about to leave the service area of ​​the small base station.

[0241] Step 2: The small base station sends a message E-RAB Modification Request to the m...

Embodiment 3

[0248] This embodiment mainly describes the process that the terminal offloads the FTP service to the macro base station because the service rate cannot be guaranteed in the small base station. The network topology is as follows: Figure 5 shown. The terminal has two services, one is E-RAB1, which carries the service type of HTTP, and the other is E-RAB2, which carries the service type of FTP, and its minimum target rate is 8 Mbps for the downlink and 1 Mbps for the uplink. Each bearer is served by the small base station. Since the service rate of E-RAB2 cannot be guaranteed, the small base station needs to redistribute the bearer back to the macro base station. The UE-AMBR set by the network management for the terminal is 70Mbps downlink and 30Mbps uplink. The frequency point used in the macro base station is F1, and the frequency point used in the small base station is F2.

[0249] Step 1: The small base station monitors the terminal's spectrum efficiency and business ser...

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Abstract

The invention discloses a method and a system for allocating wireless resource between nodes. The method comprises the steps of determining a fact that user terminal is in an effective coverage area of a target node by a source node, furthermore determining whether a preset shunting triggering condition is satisfied; if satisfaction of the preset shunting triggering condition is determined, transmitting shunting notification information by a source node to a target node; after the target node receives the shunting notification information, determining whether corresponding shunting load is admitted, and transmitting shunting load confirmation information to the source node when at least one shunting load can be admitted, wherein the shunting load confirmation information comprises an admittable shunting load identification; and after the source node receives the shunting load confirmation information, shunting a corresponding load to the target node according to the admittable shunting load identification. Therefore the method and the system have advantages of effectively reducing probability of overlow service rate caused by unreasonable resource allocation, reducing time frequency resource waste of small base station, improving network throughput and improving user experience.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and system for allocating wireless resources between nodes. Background technique [0002] With the increase of user demand for LTE (Long Term Evolution, Long Term Evolution) network capacity and coverage, the introduction of small base stations (Small Cells) is bound to be required in future LTE networks to absorb traffic and enhance coverage. However, the introduction of traditional small base stations is To a certain extent, it will increase the interference between nodes and have a negative impact on terminal mobility. In the standard research of 3GPP (The 3rd Generation Partnership Project, 3rd Generation Partnership Project) R12, the topic of SCE (Small Cell Enhancement, small base station enhancement) mainly studies related issues such as capacity and mobility in heterogeneous networks. In the current standard, the small base station enhancement mainly discusses the prot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W28/08H04W28/22H04W36/08
Inventor 许森孙震强张光辉
Owner CHINA TELECOM CORP LTD