CN102006669A - Resource allocation method in HARQ region and base station - Google Patents

Abstract

The embodiment of the invention discloses a resource allocation method in an HARQ region and a base station, relating to the technical field of communication and solving the technical problem of resource waste when an STC DP Zone is applied in the HARQ region in the prior art. The method mainly comprises the steps of: determining resource quantity required in the HARQ region for a user according to the traffic volume of the user; and allocating the resource quantity for the user according to the L times of minimum time granularity unit of the resource quantity required by the HARQ region in the HARQ region, wherein L is a positive integer of more than or equal to 1. The embodiment of the invention is mainly used for resource allocation.

Description

Resource allocation method and base station in HARQ area

technical field

The present invention relates to the field of communication technology, in particular to a resource allocation method and a base station in a hybrid automatic repeat retransmission HARQ (Hybird Automatic Repeat reQuest, HARQ) area.

Background technique

As an effective technical means to improve spectrum efficiency, multi-antenna can be applied in WIMAX (Worldwide Interoperability for Microwave Access) system to improve WIMAX system throughput and terminal user experience. Multi-antenna technology includes MIMO (Multiple-Input Multiple-Out-put) technology and Beamforming (beam nature) technology.

For MIMO technology, the industry defines STC Zone (Space Time Coding Zone, space-time code area). In the STC Zone, two consecutive Slots (time slots) in time are used as the minimum scheduling unit, and one Slot is in time. Occupies 2 Symbols and occupies one Subchannel (subchannel) in frequency, as shown in Figure 1, that is, four Symbols in time (Symbol is the scheduling unit in time) and one Subchannel in frequency as the minimum scheduling unit . On the basis of STC Zone, the industry defines STC's DP (Dedication Pilot, dedicated pilot) Zone for Beamforming technology. In STC DP Zone, 4 or 6 Subchannels on frequency are called a Major Group ( main group). The industry stipulates that within the STC DP Zone, as shown in the rectangular area in Figure 2, the resources allocated to users must be: (M Major Groups)*(4N Symbols), where M and N are natural numbers.

The HARQ technology is a technology that improves the transmission efficiency of the air interface, and can effectively resist the influence of channel fading. For the HARQ technology, the industry defines the HARQ area. The HARQ area is a rectangular area, which is divided into several subbursts in one HARQ area. As shown in Figure 3, in the HARQ area, the allocation rule of each subburst is: The unit of 2 symbols is allocated in sequence in frequency. When the frequency increases to the boundary of the HARQ area, the resources in the subsequent 2 Symbols are allocated, and this cycle is repeated. Therefore, the allocated resources are like a snake. Refer to Figure 3 for allocation to a certain User's first HARQSubburst shape.

In the prior art, when HARQ is enabled and the STC DP Zone is used for resource allocation at the same time, since the STC DP Zone requires the user to allocate resources to be a rectangle of M Major Groups by 4N Symbols, and the HARQ zone When allocating, it is incremented in a serpentine manner in units of 2 Symbols, so the above two constraints must be satisfied at the same time during resource allocation.

In the process of realizing the above resource allocation, the inventors found that at least the following problems exist in the prior art:

In a HARQ zone as shown in Figure 4, user A needs to use 8Major Group*2Symbol resources, but limited by the constraints of the HARQ STC DP Zone, 6MajorGroup*4Symbol resources must be allocated to user A. Therefore, resources with 4major group*2symbol among them are unnecessary, and so is user B. It can be seen that, according to the prior art, when resources are allocated to users while satisfying the above two constraints at the same time, resources are easily wasted.

Contents of the invention

Embodiments of the present invention provide a resource allocation method and a base station in an HARQ area, so as to reduce resource waste when allocating resources to users in the HARQ area.

In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:

A resource allocation method in a HARQ region, comprising:

determining the amount of resources required in the HARQ area for the user according to the traffic volume of the user;

Allocating the resource amount to the user in the HARQ region according to the required resource amount by L times the minimum time granularity unit of the HARQ region, where L is a positive integer greater than or equal to 1.

A base station, comprising:

a determining unit, configured to determine the amount of resources needed in the HARQ area for the user according to the traffic volume of the user;

An allocating unit, configured to allocate the amount of resources to the user in the HARQ region at L times the minimum time granularity unit of the HARQ region according to the required amount of resources, where L is a positive integer greater than or equal to 1.

The technical solution of this embodiment has the following beneficial effects: in the HARQ area, according to the minimum time granularity multiplier rule that changes the time granularity, the amount of resources is allocated to the user, which can reduce the time when applying STE DP ZONE in the HARQ area. The waste of resources caused by constraints, thereby improving the utilization of resources.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic diagram of the dispatching unit in the STC Zone in the background technology;

Fig. 2 is a schematic diagram of the scheduling unit in the STC DP Zone in the background technology;

FIG. 3 is a schematic diagram of HARQ area allocation rules in the background technology;

Figure 4 is a schematic diagram of resource allocation after the combination of the HARQ area and the STC DP Zone technology in the background technology;

FIG. 5 is a schematic flowchart of a resource allocation method in a HARQ region according to Embodiment 1 of the present invention;

FIG. 6 is a schematic diagram of a scheduling unit in a HARQ area according to Embodiment 1 of the present invention;

FIG. 7 is a schematic diagram of resource allocation of user A in the HARQ area in Embodiment 1 of the present invention;

FIG. 8 is a schematic diagram of resource allocation of user B in the HARQ area in Embodiment 1 of the present invention;

FIG. 9 is a schematic diagram of resource allocation of user C in the HARQ area in Embodiment 1 of the present invention;

FIG. 10 is a schematic structural diagram of a base station according to Embodiment 2 of the present invention.

Detailed ways

An embodiment of the present invention provides a resource allocation method in a HARQ region, the method mainly includes:

Determine the amount of resources needed in the HARQ area for the user according to the traffic volume of the user; allocate the amount of resources to the user in the HARQ area at L times the minimum time granularity unit of the HARQ area according to the required amount of resources , where L is a positive integer greater than or equal to 1.

The resource allocation method provided in the embodiment of the present invention changes the time granularity in the allocation mode when resources are allocated in the HARQ zone, so when combined with the STC DP Zone technology, the method of determining the amount of resources for the user according to the multiple of the minimum time granularity can be Reduce waste of resources when allocating resources to users in the HARQ area.

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention. In addition, each of the following embodiments is an optional solution of the present invention, and the arrangement sequence and number of the embodiments have nothing to do with their preferred execution order.

Example 1

This embodiment is specifically combined in the HARQ area, and under the scene of applying the STP DP Zone technology at the same time, a resource allocation method in the HARQ area is provided, as shown in Figure 5, which includes:

Step 101, determine the resource number needed in the HARQ area for the user according to the traffic of the user;

For example, the base station receives a request from user A to perform a voice service, and according to the traffic volume of the voice service requested by user A, the base station determines the resource amount 8Major Group*2Symbol required by user A in the HARQ area.

Step 102: Allocate the resource amount to the user in the HARQ region at L times the minimum time granularity unit of the HARQ region according to the required resource amount, where L is a positive integer greater than or equal to 1. Wherein, allocating the resource amount to the user in the HARQ region according to the required resource amount by L times the minimum time granularity unit of the HARQ region includes: according to the required resource amount by the minimum time granularity of the HARQ region The L times of the unit is the basic unit of time, and resources are allocated in ascending order in the unit of Major Group in terms of frequency until the amount of allocated resources reaches the required amount of resources.

The minimum time granularity unit in the embodiment of the present invention can be set according to needs, and the minimum time granularity unit commonly used at present is generally 4 symbols; of course, the minimum time granularity unit in the embodiment of the present invention can also choose 8 symbols, or 16 symbols, which need to be selected according to specific application scenarios.

As a further improvement, if the required amount of resources has not been reached after reaching the boundary of the HARQ region in frequency, then shift back in time by L times the minimum time granularity unit of the HARQ region, and then use the HARQ L times of the minimum time granularity unit of the region is the basic unit of time, and resources are allocated in descending order in the unit of Major Group in terms of frequency, and so on, until the amount of allocated resources reaches the required amount of resources.

Specifically, taking the above-mentioned L=1 as an example (the scheduling unit at this time is shown in FIG. 6 ), the above-mentioned amount of resources according to needs takes L times of the minimum time granularity unit of the HARQ area as the basic unit in time, and in frequency The main group, Major Group, allocates resources in increasing order until the amount of allocated resources reaches the required amount of resources. Specifically:

Because the current industry stipulates that the minimum time granularity unit in the HARQ area is 4 symbols, and the minimum frequency granularity unit is 1 Major Group, so when the resource amount of user A is 8MajorGroup*2Symbol, the base station allocates resources with 4 symbols Symbol is the basic unit of time. In terms of frequency, resources are allocated in increasing order with Major Group as the unit, until the amount of allocated resources reaches the required amount of resources. Refer to Figure 7 for resources allocated to user A.

For another example, when the minimum time granularity unit is 4 symbols, if user B needs to be allocated 8Major Group*2Symbol, then the frequency resources allocated to user A will continue to be allocated (i.e. a serpentine allocation), with 4 A symbol is the basic unit of time, and Major Groups are allocated on frequency in increasing order, as shown in Figure 8, after the resources of 4Major Group*2Symbol are allocated, if the Major Group on the frequency reaches the boundary of the HARQ area, the allocation If the amount of resources has not yet reached the 8Major Group*2Symbol resource amount required by user B, then shift back 4 symbols in time, then use 4 symbols as the basic unit of time, and use Major Group as the unit of frequency Continue to allocate in descending order until reaching 8Major Group*2Symbol.

It can be seen from FIG. 9 that according to the method provided in this embodiment, after the HARQ area resources of the same size are allocated to user A and user B with 8Major Group*2Symbol respectively, there is no resource waste, and in the prior art this The resources that should be wasted can be used to allocate to the user C who needs resources of 8Major Group*2Symbol in the method of this embodiment.

The above content is specifically described by taking L=1 as an example, and in practical applications, it may be required according to the situation without being limited by this. For example, L can be 2 or 3, etc. At this time, when the minimum time granularity unit is 4 symbols, 8 symbols or 12 symbols are used as the basic unit of time when allocating resources to users, and the frequency The resources are allocated in an increasing order, and the specific implementation manner is similar to the above-mentioned embodiment, and will not be repeated here.

In the method provided by this embodiment, in the HARQ area, by using L times of the minimum time granularity as the technical means of allocating resources to the user as the basic unit of time, it can reduce the need to satisfy both when applying the STEDP ZONE in the HARQ area. The waste of resources caused by constraints, thereby improving the utilization of resources.

Example 2

This embodiment provides a base station, as shown in FIG. 10 , including: a determining unit 91 and an allocating unit 92 .

Wherein, the determination unit 91 is used to determine the amount of resources required in the HARQ area for the user according to the traffic volume of the user; the allocation unit 92 is used to determine the amount of resources required in the HARQ area in the minimum time granularity unit of the HARQ area according to the required amount of resources. L times of L to allocate the resource amount to the user, wherein, L is a positive integer greater than or equal to 1.

The minimum time granularity unit of the HARQ area in the embodiment of the present invention can be set according to needs, and the currently commonly used minimum time granularity unit can be selected but not limited to the following values: 4 symbols, or 8 symbols, or 16 symbols.

The above allocation unit 92 may include: a first allocation unit 921 .

The first allocating unit 921 is configured to use L times of the minimum time granularity unit of the HARQ region as the basic unit in time according to the required amount of resources, and allocate the frequency in ascending order with the Major Group as the unit resource.

As a further improvement of the embodiment of the present invention, the above allocation unit 92 may further include a second allocation unit 922, after the first allocation unit 921 allocates resources to the boundary of the HARQ region, the required amount of resources has not yet been reached, Then the second allocating unit 922 shifts L times of the minimum time granularity unit of the HARQ area backward in time, and then takes L times of the minimum time granularity of the HARQ area as the basic unit in time, and takes Major Group as the unit in frequency Continue to allocate resources in descending order until the allocated resources reach the required amount of resources.

As a further improvement of the embodiment of the present invention, when the L=1, the first allocating unit 921 takes a minimum time granularity unit as the basic unit in time, and allocates the frequencies in ascending order in units of Major Groups resource.

As another improvement of the embodiment of the present invention, when the L=1, after the first allocation unit allocates resources to the boundary of the HARQ region, the amount of allocated resources has not yet reached the required amount of resources, Then the second allocating unit 922 shifts backward in time by one minimum time granularity unit, and then takes a minimum time granularity unit as the basic unit of time, and continues to allocate in descending order with the Major Group as the unit of frequency until the allocated The amount of resources reaches the required amount of resources.

In the HARQ area, the base station provided by this embodiment allocates resources for users according to the minimum time granularity multiplier rule with changed time granularity, which can reduce the resources caused by satisfying the two constraints when applying STE DP ZONE in the HARQ area. Waste, thereby improving the utilization of resources.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus a necessary general-purpose hardware platform, and of course also by hardware, but in many cases the former is a better implementation Way. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product is stored in a readable storage medium, such as a floppy disk of a computer , a hard disk or an optical disk, etc., including several instructions for enabling a device (which may be a base station, a network controller, etc.) to execute the methods described in various embodiments of the present invention.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. All should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (11)

1. A resource allocation method in a HARQ region, characterized in that, comprising: determining the amount of resources required in the HARQ area for the user according to the traffic volume of the user; Allocating the resource amount to the user in the HARQ region according to the required resource amount by L times the minimum time granularity unit of the HARQ region, where L is a positive integer greater than or equal to 1. 2. The method according to claim 1, wherein the minimum time granularity unit of the HARQ region is 4 symbols, or 8 symbols, or 16 symbols. 3. The method according to claim 1 or 2, wherein, according to the required amount of resources, in the HARQ region, the resource amount is allocated to the user by L times of the minimum time granularity unit of the HARQ region Including: according to the required amount of resources, L times of the minimum time granularity unit of the HARQ area is used as the basic unit of time, and the frequency is allocated in ascending order with the Major Group as the unit until the amount of allocated resources reaches The amount of resources required. . 4. The method according to claim 3, wherein, according to the required amount of resources, allocating the amount of resources to the user in the HARQ region by L times the minimum time granularity unit of the HARQ region further comprises : If the resource amount has not been reached after reaching the boundary of the HARQ region in frequency, then shift backward in time by L times of the minimum time granularity unit of the HARQ region, and then use L times of the minimum time granularity unit of the HARQ region Times is the basic unit of time, and the frequency is continued to allocate resources in descending order with the Major Group as the unit, until the allocated resources reach the required amount of resources. 5. The method according to claim 3, wherein when the L=1, according to the required amount of resources, L times of the minimum time granularity unit of the HARQ region is used as the basic unit in time, and in frequency Above, the major group is used as the unit to allocate resources in increasing order until the amount of allocated resources reaches the required amount of resources. Specifically: A minimum time granularity unit is used as the basic unit of time, and resources are allocated in ascending order in terms of frequency in Major Group units until the amount of allocated resources reaches the required amount of resources. 6. The method according to claim 5, further comprising: If after the Major Group on the frequency reaches the boundary of the HARQ region, the amount of allocated resources has not reached the required amount of resources, then shift back in time by a minimum time granularity unit, and then use a minimum time The unit of granularity is the basic unit of time, and the major group is used as the unit of frequency to continue to allocate in descending order until the amount of allocated resources reaches the required amount of resources. 7. A base station, characterized in that, comprising: a determining unit, configured to determine the amount of resources required in the HARQ area for the user according to the traffic volume of the user; An allocating unit, configured to allocate the amount of resources to the user in the HARQ region at L times the minimum time granularity unit of the HARQ region according to the required amount of resources, where L is a positive integer greater than or equal to 1. 8. The base station according to claim 7, wherein the allocating unit specifically comprises a first allocating unit, and the first allocating unit is used to set the minimum time granularity unit of the HARQ region according to the required amount of resources L times is the basic unit in terms of time, and in terms of frequency, resources are allocated in ascending order with the Major Group as the unit. 9. The base station according to claim 8, wherein the allocating unit further comprises a second allocating unit, the second allocating unit is configured to allocate resources to the boundary of the HARQ region after the first allocating unit allocates resources , has not yet reached the required amount of resources, then shift L times of the minimum time granularity unit of the HARQ area backward in time, and then take L times of the minimum time granularity of the HARQ area as the basic unit of time, in the frequency Continue to allocate resources in descending order on the basis of Major Group until the allocated resources reach the required amount of resources. 10. The base station according to claim 8 or 9, wherein when the L=1, the first allocating unit is configured to take a minimum time granularity unit as the basic unit in time, and in frequency Resources are allocated in ascending order in units of Major Groups. 11. The base station according to claim 10, wherein when the L=1, the second allocation unit is used to allocate resources to the border of the HARQ region after the first allocation unit allocates resources If the amount of resources has not reached the required amount of resources, then shift back in time by a minimum time granularity unit, then use the minimum time granularity unit as the basic unit of time, and decrease the frequency in units of Major Group The sequence continues to allocate resources until the amount of allocated resources reaches the required amount of resources.

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