CN100484073C - Improved method and apparatus for high-speed down packet access - Google Patents

Abstract

The invention provides an improved high speed downlink packet access (HSDPA) method and device, and the method comprises: as dispatching different users in polling mode, starting with a second frame and dispatching each user in preset dispatching mode, i.e. the users dispatched by each frame include part of plural users dispatched by the previous fame and the undispatched users. It assures the fairness in resource distribution of high speed descending packet access; and it can change the number of dispatched users, flexible to implement.

Description

A kind of improved high speed downward grouping cut-in method and device

Technical field

The present invention relates to network communications technology field, relate in particular to a kind of improved high speed downward grouping cut-in method and device.

Background technology

High speed downlink packet inserts (HSDPA, High Speed Downlink PacketAccess), it is the key property of WCDMA technology the 5th version, by adaptive modulation and coding (AMC), mix to retransmit (HARQ), and a series of technology such as the fast dispatch of base station realize descending high speed data transfer.

In the WCDMA system, the introducing of HSDPA has increased by three kinds of channels, is respectively the HS-SCCH channel at the HS-PDSCH of downlink transmission data information channel, transmission Downlink Control Information, and the HS-DPCCH channel of transmission uplink feedback information.HSDPA compares with dedicated channel DPCH, and HSDPA has very big advantage.Mainly be:

At first, a plurality of users in the sub-district share all resources of HSDPA.The operable HS-PDSCH channel in sub-district can reach 15 at most, and the spreading factor of the channel code that each channel uses is fixed as 16.As shown in Figure 1, the channel of these carrying data can reasonably be distributed to each user dynamically according to user's data transmission demand and residing channel circumstance, and synchronization also can be distributed to a plurality of users to resource according to certain ratio.By using certain dispatching algorithm, system can also distribute more HS-PDSCH channel for the good user of channel circumstance, so just can further improve the capacity of system.And for dedicated channel, system is necessary for each user and distributes fixing resource, when certain user does not have transfer of data, distributes to this user's resource and can not be used by other user, thereby cause the waste of resource.Therefore, very suitable those transfer of data demands of HSDPA technology have sudden, and data transmission delay requires not have the high non-real-time services of session service such as voice call.

Secondly, the adaptive modulation and coding function of HSDPA, make the modulation system that when the residing channel circumstance of user is reasonable, can adopt 16QAM, and use high encoding rate, thereby under the situation of using same letter sign indicating number and power resource, improved 100% even more the acquisition high-speed data transmission, the relative DCH channel of the resource utilization of channel code and power.If a cell configuration 15 HS-PDSDCH channels, each user's maximum data transfer rate can reach 13.976Mbps when the residing channel circumstance of user allowed in theory.Therefore, HSDPA is the solution that the WCDMA down high-speed data inserts, and can effectively solve the limited problem of downlink capacity.

Once more, HSDPA adopt to mix retransmits (HARQ) technology, directly the data of bust this is retransmitted in physical layer, and the rlc layer of contrast DCH channel retransmits, and greatly reduces the time delay that data re-transmission is brought, thereby provides higher service quality for the user.

Existing RoundRobin algorithm adopts polling mode to dispatch, and does not consider the difference of channel quality between the user, successively the data of different user is taken turns flow transmission, makes all user fairness use channel resource.If there are 4 identical HSDPA users of user gradation to be respectively A in the sub-district, B, C, D, each 2ms frame sends two users, HS-PDSCH sign indicating number resource has only 8 sign indicating numbers, other resource is not limited, resource allocation policy is preferential to guarantee that ordering needs to send the HSDPA user's of data resource requirement the preceding, its data volume with maximum is sent, and the grade of supposing HSDPA user is 12, and the operable maximum codeword number of HSDPA user is 5 so, so the HS-PDSCH number of codewords that is assigned to of Xuan Ding first user is that the operable HS-PDSCH code word of the HSDPA user data that 5, the second needs send have just had only 3.So the code assignment of these 4 HSDPA users' HS-PDSCH order as shown in Figure 2.

Suppose that polling sequence is A-〉B-〉C-〉D, in first 2ms frame, dispatch A so, two HSDPA users of B, the HS-PDSCH code word number of distribution is respectively 5,3; Second 2ms frame scheduling C, two HSDPA users of D, the HS-PDSCH code word number of distribution is respectively 5,3; Begin loop cycle during to the 3rd and 4 2ms frame; Can find A in this case, B, C, the ratio of the HS-PDSCH number of codewords that four HSDPA users of D are assigned to can remain unchanged always, is fixed as 5: 3: 5: 3.This shows that existing technical scheme has just guaranteed the fairness of HSDPA user's scheduling times, but do not guarantee the fairness of HSDPA resource allocation.

Summary of the invention

In view of above-mentioned existing in prior technology problem, the purpose of this invention is to provide a kind of can the uniform distribution scheduling times and the high speed downward grouping cut-in method and the device of resource.

The objective of the invention is to be achieved through the following technical solutions:

A kind of improved high speed downward grouping cut-in method comprises:

When adopting polling mode that different user is dispatched, since second frame, each user to be dispatched according to predetermined scheduling mode, described predetermined scheduling mode is:

The number of users of each frame scheduling is identical, two users of every frame scheduling;

The user of described each frame scheduling comprises: remove the user after first user who is scheduled and first user who is not dispatched by previous frame among the user who is dispatched by previous frame.

The user of the every frame scheduling equal number of the frame of described dispatched users is when whole usefulness are begun to dispatch each user by loop cycle successively from first user after the scheduling per family successively.

When a plurality of user of every frame scheduling, need be preferably the user resource allocation the preceding that sorts according to scheduled user's succession.

A kind of improved high speed downlink packet access device comprises:

User's scheduler module is used for all users are carried out polling dispatching according to the cycle, and it specifically is scheduling to:

The number of users of each frame scheduling is identical, two users of every frame scheduling;

Since second frame, the user of described each frame scheduling comprises: remove the user after first user who is scheduled and first user who is not dispatched by previous frame among the user who is dispatched by previous frame.

Described improved high speed downlink packet access device also comprises:

The user resources distribution module is used at each user resource allocation to being scheduled user's the resource requirement the preceding that sorts among the scheduled user at first being satisfied in the distribution of resource;

The user data sending module, the resource that is used for being assigned to according to the user sends user's data according to the time interval, and the time interval is set before transfer of data.

As seen from the above technical solution provided by the invention, the present invention is all identical with quantity by having realized according to predetermined way polling dispatching user the scheduled transmission number of times of each user data, guarantees the fairness of the resource allocation that high speed downlink packet inserts; The present invention's number of dispatched users simultaneously can change, and method realizes having flexibility.

Description of drawings

Figure 1 shows that the scheduling schematic diagram of HSDPA resource between a plurality of users in the prior art;

The user who Figure 2 shows that prior art dispatches schematic diagram;

The user who Figure 3 shows that the embodiment of the invention dispatches schematic diagram;

Figure 4 shows that the device schematic diagram of the embodiment of the invention.

Embodiment

Core of the present invention is to adopt polling mode that different user is dispatched, and each transmission frame can be dispatched a plurality of users of equal number; In concrete scheduling, according to predetermined scheduling mode each user is dispatched since second frame; Described predetermined scheduling mode is: the number of users of each frame scheduling is identical, comprises part user's data among a plurality of users that dispatched by previous frame and the user's data of not dispatched by previous frame successively.

More specifically say, each user of poll of the present invention, and user data is dispatched according to predetermined scheduling mode, and divide the resource that is used in transmitting user data for the user who is scheduled.

Described predetermined scheduling mode is: the usefulness of each frame scheduling comprises certain customers among a plurality of users that dispatched by previous frame and the user who is not dispatched by previous frame per family successively, and the number of users of every frame scheduling is identical.

In user's scheduling process, according to described predetermined scheduling mode the user is dispatched since second frame.

Before the user was dispatched, the number of users that each frame can transmit simultaneously can be set according to actual conditions.

After to user's scheduling, need divide the resource that is used in transmitting user data for the scheduled user.When high-speed physical downlink shared channel (HS-PDSCH) (HS-PDSCH) the sign indicating number resource-constrained but simultaneously the transmission number of users again more for a long time, need satisfy the user that sorts the preceding to the requirement of resource according to preferential before and after scheduled user's the ordering, after satisfying the requirement of front user, use the data of remaining sign indicating number resource transmission subsequent user to resource.

Below in conjunction with the specific embodiment of the invention accompanying drawing the present invention is elaborated.

The present invention is using the HSDPA technology to realize using the user being carried out the method dispatched users of poll one by one in the process of down high-speed data transmission, and the user resource allocation for being scheduled.

Polling dispatching order of the present invention as shown in Figure 3.

As shown in Figure 3, the embodiment of the invention is A-to user's polling sequence〉B-〉C-〉D, and poll carries out successively to each user.

In the embodiment of the invention, suppose to have in the sub-district 4 HSDPA users that grade is identical, be respectively A, B, C, D, each 2ms frame sends wherein two users;

When the HS-PDSCH sign indicating number resource that every frame sends has only 8 sign indicating numbers, and other resource is not limited, then under the guidance of resource allocation policy, preferentially guarantees to sort user's resource requirement the preceding, and its data volume with maximum is sent.Suppose two HSDPA users of scheduling in each 2ms frame of the embodiment of the invention, HSDPA user's grade is 12, can learn that according to agreement an operable maximum codeword number of HSDPA user is 5, so among Xuan Ding two users, the HS-PDSCH number of codewords that first user is assigned to is that the operable HS-PDSCH code word of the HSDPA user data that 5, the second needs send are 3.

In whole polling dispatching, dispatch each user and for the concrete scheduling situation of each scheduled user's Resources allocation be:

Dispatch two HSDPA users of A, B in first 2ms frame successively, what A, party B-subscriber were assigned with is respectively 5,3 to HS-PDSCH code word number;

Second 2ms frame dispatched two HSDPA users of B, C successively, and the HS-PDSCH code word number that B, C user are assigned with is respectively 5,3;

The 3rd 2ms frame dispatched two HSDPA users of C, D successively, and the HS-PDSCH code word number that C, D user are assigned with is respectively 5,3;

The 4th 2ms frame dispatched two HSDPA users of D, A successively, and the HS-PDSCH code word number that D, party A-subscriber are assigned with is respectively 5,3;

Dispatch above-mentioned four users circularly since the 5th 2ms frame.

This shows, the number of times of the embodiment of the invention each user's scheduling behind two cycle periods is identical, and the number ratio of the numeral transfer resource that is assigned to of each HSDPA user is 1: 1: 1: 1, both guaranteed that HSDPA user's scheduling times was identical, guaranteed that again each user is assigned to the HSDPA total resources and equates, realized the fair allocat of HSDPA resource.

A kind of improved high speed downlink packet access device as shown in Figure 4 comprises:

User's scheduler module is used for all users are carried out polling dispatching according to the cycle, and it specifically is scheduling to since the user of the each scheduling of second frame and comprises certain customers among a plurality of users that dispatched by previous frame and the user who is not dispatched by previous frame.

Described improved high speed downlink packet access device also comprises:

The user resources distribution module is used at each user resource allocation to being scheduled user's the resource requirement the preceding that sorts among the scheduled user at first being satisfied in the distribution of resource;

The user data sending module, the resource that is used for being assigned to according to the user sends user's data according to the time interval, and the time interval is set before transfer of data.

At first carry out pre-set polling dispatching by user's scheduler module to requiring the user who sends data in the described device busy, promptly the user since the each scheduling of second frame comprises certain customers among a plurality of users that dispatched by previous frame and the user who is not dispatched by previous frame; The user resources distribution module has been dispatched the resource of user's distributing user transmission data according to the resource allocation rule for each in polling dispatching, after the user had been assigned to resource requirement, the user data sending module used this resource to send user's data.

The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.

Claims (5)

1, a kind of improved high speed downward grouping cut-in method is characterized in that, comprising:

When adopting polling mode that different user is dispatched, since second frame, each user to be dispatched according to predetermined scheduling mode, described predetermined scheduling mode is:

The number of users of each frame scheduling is identical, two users of every frame scheduling;

The user of described each frame scheduling comprises: remove the user after first user who is scheduled and first user who is not dispatched by previous frame among the user who is dispatched by previous frame.

2, a kind of improved high speed downward grouping cut-in method according to claim 1 is characterized in that, the user of every frame scheduling equal number is when whole usefulness are begun to dispatch each user by loop cycle successively from first user after the scheduling per family successively.

3, a kind of improved high speed downward grouping cut-in method according to claim 1 is characterized in that, when a plurality of user of every frame scheduling, need be preferably the user resource allocation the preceding that sorts according to scheduled user's succession.

4, a kind of improved high speed downlink packet access device is characterized in that, comprising:

User's scheduler module is used for all users are carried out polling dispatching according to the cycle, and it specifically is scheduling to:

The number of users of each frame scheduling is identical, two users of every frame scheduling;

Since second frame, the user of described each frame scheduling comprises: remove the user after first user who is scheduled and first user who is not dispatched by previous frame among the user who is dispatched by previous frame.

5, a kind of improved high speed downlink packet access device according to claim 4 is characterized in that, also comprises:

The user resources distribution module is used at each user resource allocation to being scheduled user's the resource requirement the preceding that sorts among the scheduled user at first being satisfied in the distribution of resource;

The user data sending module, the resource that is used for being assigned to according to the user sends user's data according to the time interval, and the time interval is set before transfer of data.

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