CN102149197A

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Info

Publication number: CN102149197A
Application number: CN201010110672XA
Authority: CN
Inventors: 谢勇; 范晨; 王东锋
Original assignee: TD Tech Ltd
Current assignee: TD Tech Ltd
Priority date: 2010-02-09
Filing date: 2010-02-09
Publication date: 2011-08-10

Abstract

The invention discloses a time slot (TS) scheduling method in high speed downlink packet access (HSDPA) user scheduling, comprising the following steps: presetting a scheduling rule, wherein the scheduling rule is used for breaking TS scheduling modes from front to back or from back to front in accordance with TS numbers; and an HSDPA scheduler of a base station schedules the TS in accordance with the preset scheduling rule in a disordered mode when the HSDPA scheduler allocates the TS to a user at each scheduling time. The method is utilized to reduce interference level, improve the signal to noise ratio (SNR) of an HSDPA service channel, and increase throughputs of the user and a cell.

Description

Timeslot scheduling method in a kind of HSDPA user's scheduling

Technical field

The present invention relates to HSDPA user's dispatching technique, the timeslot scheduling method in particularly a kind of HSDPA user's scheduling.

Background technology

The HSDPA resource pool comprises a plurality of time interval resources usually.A scheduling constantly, when scheduler distributes time interval resource for the user, generally be according to time-gap number in the past backward or from after forward mode distribute, under the cell scenario following problem will appear so in flakes:

The user's data amount is little in the sub-district, and when taking whole all time interval resources inadequately, in the resource pool time slot corresponding of neighbor cell, the chance that some time slot is scheduled is a lot, and other time slots then dispatcher can less even seldom scheduling.

The many time slots of dispatcher meeting will cause the traffic data demodulation poor performance, and meanwhile, dispatcher can be fully used but by that less a part of time interval resource because the adjacent area co-channel interference is bigger.

By simulation result shown in the table 1 as can be seen:, still exist time slot that the residue situation is arranged even for a plurality of HTTP users.Concrete condition is as follows:

Dispose 3 time interval resource ponds, 2 couples of SCCH/SICH during 4 the HTTP users in each sub-district, are carved with remaining time slots during 24% scheduling, and 8% scheduling remains two time slots constantly.

	No remaining time slots	Remaining time slots is arranged	The remaining time slots number is 2
				6ue/cell	90％	10％	?3％
4ue/cell	76％	24％	?8％
				2ue/cell	29％	71％	?23％

Table 1

Summary of the invention

In view of this, main purpose of the present invention is to provide the timeslot scheduling method in a kind of HSDPA user's scheduling.

For achieving the above object, the invention provides the timeslot scheduling method in a kind of HSDPA user's scheduling, comprising:

Set in advance scheduling rule, described scheduling rule be used to upset according to time-gap number in the past backward or from after forward timeslot scheduling mode;

When the HSDPA scheduler of base station distributes time slot to the user constantly in each scheduling, time slot is upset scheduling according to the described scheduling rule that sets in advance.

Preferably, the described rule that sets in advance is: be the sub-district of odd number for cell ID ID, when distributing time slot according to time-gap number in the past backward mode distribute, be the sub-district of even number for sub-district ID, when distributing time slot according to time-gap number from after forward mode distribute.

Preferably, the described rule that sets in advance is: resource pool is considered as joining end to end, and the mode that identifies resource pool size delivery according to UE calculates initial distributed time slot numbering.

As seen from the above technical solution, the timeslot scheduling method of a kind of optimization in HSDPA user's scheduling provided by the invention, by set in advance be used to upset existing according to time-gap number in the past backward or from after forward the scheduling rule of timeslot scheduling mode, and by the HSDPA scheduler of base station when each scheduling distributes time slot to the user constantly, according to this scheduling rule time slot is upset scheduling, thereby reduced interference level, improve the signal to noise ratio of HSDPA Traffic Channel, and improved the throughput of user and sub-district.

Description of drawings

Fig. 1 is the simulation result schematic diagram that the adjacent area of descending time slot receives gross power;

Fig. 2 is the simulation result schematic diagram that shows the signal to noise ratio of downlink traffic channel;

Fig. 3 is the simulation result schematic diagram of sub-district total throughout.

Embodiment

For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in further detail.

Main thought of the present invention is: set in advance scheduling rule, this scheduling rule be used to upset existing according to time-gap number in the past backward or from after forward timeslot scheduling mode, when the HSDPA scheduler of base station distributes time slot to the user constantly in each scheduling, according to this scheduling rule time slot is upset scheduling, thereby reduction interference level, improve the signal to noise ratio of HSDPA Traffic Channel, and improve the throughput of user and sub-district.

The present invention is described in detail below by two preferred embodiments:

Embodiment one:

Present embodiment is upset scheduling according to sub-district ID to time slot.For sub-district ID is the sub-district of odd number, when distributing time slot according to time-gap number in the past backward mode distribute, be the sub-district of even number for sub-district ID, when distributing time slot according to time-gap number from after forward mode distribute.

Specify the beneficial effect of this preferred embodiment below by emulation.

Simulating scenes: HSDPA identical networking, 2 time interval resource ponds, 2 couples of HS-SCCH/HS-SICH, sub-district in flakes, 6 the HTTP Internet users in each sub-district.

Simulation result such as Fig. 1～shown in Figure 3.Wherein:

Fig. 1 is the simulation result schematic diagram of the adjacent area interference power of descending time slot.Among Fig. 1, adjacent area interference power shown in the thinner curve for adopting prior art to obtain, shown in the thicker curve is the adjacent area interference power that adopts the present invention to obtain, and as seen in Figure 1: the adjacent area that this preferred embodiment can reduce descending time slot receives gross power.

Fig. 2 is the simulation result schematic diagram that shows the signal to noise ratio of downlink traffic channel.Among Fig. 2, shown in the thinner curve is the signal to noise ratio that adopts the HSDPA Traffic Channel of prior art acquisition, shown in the thicker curve is the signal to noise ratio that adopts the HSDPA Traffic Channel of the present invention's acquisition, and as seen in Figure 2: this preferred embodiment can make the signal to noise ratio of downlink traffic channel improve.

Fig. 3 is the simulation result schematic diagram of sub-district total throughout.Among Fig. 3, the cell throughout that thinner curve (that curve that is in the bottom in two curves is thinner curve) illustrates for adopting prior art to obtain, shown in the thicker curve is the cell throughout that adopts the present invention to obtain, and as seen in Figure 3: this preferred embodiment can make the total throughout of sub-district be improved.

Embodiment two:

In the present embodiment, resource pool is considered as end to end, scheduling constantly calculates initial distributed time slot numbering according to the UE sign to the mode of resource pool size delivery.For example: suppose that resource pool is TS3～TS5, the current UE sign is 200, and so, this user begins to distribute backward from TS4.

As seen from the above-described embodiment, the present invention by set in advance be used to upset existing according to time-gap number in the past backward or from after forward the scheduling rule of timeslot scheduling mode, and by the HSDPA scheduler of base station when each scheduling distributes time slot to the user constantly, according to this scheduling rule time slot is upset scheduling, thereby reduced interference level, improve the signal to noise ratio of HSDPA Traffic Channel, and improved the throughput of user and sub-district.

The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.All any modifications of being done within the spirit and principles in the present invention, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. the timeslot scheduling method during a high-speed downlink packet access HSDPA user dispatches is characterized in that, comprising:

2. method according to claim 1 is characterized in that:

The described rule that sets in advance is: be the sub-district of odd number for cell ID ID, when distributing time slot, distribute according to time-gap number the past mode backward, for sub-district ID is the sub-district of even number, when distributing time slot according to time-gap number from after forward mode distribute.

3. method according to claim 1 is characterized in that:

The described rule that sets in advance is: resource pool is considered as joining end to end, and the mode that identifies resource pool size delivery according to UE calculates initial distributed time slot numbering.