CN101635958B - Method and device for distributing channel mode resources - Google Patents

Abstract

The embodiment of the present invention discloses a method and device for allocating channel code resources. The method includes: judging whether there are channel codes that can be allocated; when there are channel codes that can be allocated, acquiring the channel codes with the lightest load The symbol is allocated; when there is no channel code that can be allocated, apply for a new channel code. By using the embodiments of the present invention, as many users as possible can share the same F-DPCH channel code, and users can be assigned to the symbol with the lightest load at present, so as to improve the channel code utilization rate of the cell to the greatest extent, and balance the The load of the Uu interface.

Description

A method and device for allocating channel code resources

technical field

The invention relates to the field of wireless communication, in particular to a method and device for allocating channel code resources.

Background technique

In the third generation mobile communication system, radio resource is the most precious resource, and the utilization rate of radio resource directly affects the capacity and performance of the system. RRM (Radio Resource Management, radio resource management) mainly through the allocation and management of air interface resources, to ensure the quality of service (QoS) of the system, and to ensure the balance of system coverage and capacity. The main wireless resource elements of WCDMA system include: frequency, code word, power and so on.

In order to save the channel code resources and power resources of the cell, 3GPP (3rd Generation Partnership Project, third generation cooperation project) introduced F-DPCH (Fractional Dedicated Physical Channel, partial dedicated physical channel) in R6. F-DPCH is a simplified downlink DPCCH (DedicatedPhysical Control Channel, Dedicated Physical Control Channel), which removes the pilot bit Pilot field, and only retains the TPC field used to transmit the power control commands required for downlink power control. Its slot position remains unchanged, and the meaning of the TPC Bit is the same as that of the downlink DPCCH. As shown in Figure 1, the F-DPCH channel code can time-division multiplex more users (up to 10), and each user only occupies one Symbol in each Slot to carry the TPC Command. The protocol specifies that the SF (Spreading Factor) of F-DPCH is 256. For F-DPCH channel codes, like downlink DPCH, they are allocated on the idle code tree of SF256 in ascending order. Ten F-DPCH users share one SF256 channel code, and these ten users need to stagger each other by 256 chips in one Slot (time slot), and each offset is numbered, that is, 0 to 9. How to allocate appropriate channel codes and Symbol resources for an F-DPCH user will affect the resource utilization rate and capacity of the cell.

In the process of realizing the present invention, the inventor found that the prior art has at least the following problems:

The existing F-DPCH channel code resource allocation algorithm is relatively simple. The most typical allocation algorithm is the random allocation method, which randomly selects an F-DPCH channel code for the user, and then randomly allocates an idle symbol. Although this method is simple to implement, But the utilization rate of the F-DPCH channel code is relatively low. In addition, in the prior art, when establishing an F-DPCH channel for a soft-handover user, in order to ensure that the soft-handover link maintains a consistent timing relationship with the original link, an exclusive F-DPCH channel code is assigned to the user. Although this method is simple to implement, it greatly wastes F-DPCH channel code resources.

Contents of the invention

Embodiments of the present invention provide a method and device for allocating channel code resources, so that as many users as possible can share the same F-DPCH channel code, and assign users to the symbol with the lightest load at present, so as to maximize the efficiency of the cell. The channel code utilization rate balances the load of the Uu interface.

An embodiment of the present invention provides a method for allocating channel code resources, including:

Judging whether there is an assignable channel code;

When there are channel codes that can be allocated, acquire the symbol with the lightest load in the channel codes for allocation;

When there is no channel code that can be allocated, apply for a new channel code.

At the same time, the embodiment of the present invention provides a device for allocating channel code resources, including:

A judging module, configured to judge whether there is an assignable channel code;

A processing module, configured to allocate a channel code to a pre-access user according to the judgment result of the judgment module, and when there is the channel code that can be allocated, obtain the symbol with the lightest load in the channel code for allocation; When there are channel codes that can be allocated, apply for a new channel code.

Compared with the prior art, the embodiment of the present invention has the following advantages:

The method and device provided by the embodiments of the present invention can allocate F-DPCH channel resources respectively according to whether users have specific time offset requirements. For users without specific time offset requirements, first assign the F-DPCH channel code with the highest Symbol utilization rate, and then assign the Symbol with the lightest load; for users with specific time offset requirements (Symbol has been determined), The channel code with the highest Symbol utilization rate among the idle F-DPCH channel codes of the Symbol is assigned to it. In this way, appropriate F-DPCH channel codes and symbol numbers can be allocated to users, which saves code resources and power resources to the greatest extent, and at the same time balances the load of the Uu port.

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. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

Fig. 1 is a schematic diagram of the offset situation when ten users share the same channel code;

FIG. 2 is a flowchart of a method for allocating channel code resources in an embodiment of the present invention;

3 is a flowchart of a method for allocating channel code resources in another embodiment of the present invention;

FIG. 4 is a schematic diagram of a scenario of allocating channel code resources in another embodiment of the present invention;

FIG. 5 is a flowchart of a method for allocating channel code resources in an embodiment of the present invention;

Fig. 6 is a schematic diagram of modules of an apparatus for allocating channel code resources in an embodiment of the present invention.

Detailed ways

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.

Embodiments of the present invention provide a method and device for allocating user code resources. On the basis of increasing limited algorithm complexity, the utilization rate of F-DPCH code resources is significantly improved, and load balancing is also considered.

The method for allocating user code resources provided by the embodiments of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

FIG. 2 is a flowchart of a method for user code resource allocation provided by an embodiment of the present invention, including:

Step s201, judging whether there is an allocatable channel code. If yes, execute step s202; otherwise, execute step s203.

Step s202, when there are channel codes that can be allocated, obtain the symbol with the lightest load among the channel codes for allocation. Specifically, a channel code can be shared by ten users at the same time, each user occupies a Symbol, and when the channel code has an idle Symbol, users can be accessed on the channel. For access users that do not have time offset requirements, the channel code with the highest Symbol utilization rate can be selected, so as to improve the channel code utilization rate. After the channel code is selected, the access user can occupy any Symbol of the channel code. Based on the consideration of reducing the symbol load, the access user can occupy the Symbol with the least load. The so-called Symbol with the least load means that the users occupying the Symbol in the cell are the least.

Step s203, when there is no channel code that can be allocated, apply for a new channel code.

Through the above steps, for access users that do not have time offset requirements, channel codes with the highest symbol utilization and the lightest symbol load are assigned to them, which improves the utilization of channel code resources and also takes into account load balancing. For an access user with a time offset requirement, according to the time offset requirement, a channel code that meets the Symbol requirement and has the highest Symbol utilization rate can be assigned to it. For access users with other requirements, channel codes can be assigned to them through a similar method.

The method for user code resource allocation provided by the present invention will be described in detail below through specific embodiments. As shown in FIG. 3, for newly accessed F-DPCH users, the channel code and symbol allocation methods are as follows, specifically including:

Step s301, the base station controller judges whether there is an allocated F-DPCH channel code in the cell accessed by the user. If yes, execute step s302; otherwise, execute step s303.

Step s302, judging whether there is a channel code with an idle symbol among the allocated F-DPCH channel codes. If it exists, select any F-DPCH channel code with the highest symbol occupancy rate, and execute step s304; if not, execute step s303. Specifically, a channel code can be shared by 10 users at the same time, and the 10 users need to stagger each other by 256 chips in a slot, and each offset is numbered, and there are 10 symbols in total. The F-DPCH channel code with the highest symbol occupancy rate, that is, the F-DPCH channel code with the most access users.

In step s303, the F-DPCH user applies for a new F-DPCH channel code from the base station controller of the cell, and selects any symbol from the new channel code to allocate to the newly accessed F-DPCH user.

Step s304, obtaining the symbol with the lightest load in the channel code, and assigning it to the new access user. Specifically, the base station controller of the cell obtains symbols occupied by all F-DPCH users in the cell, obtains the Symbol with the least user load among the above-mentioned F-DPCH channel codes, and allocates the symbol to newly accessed F-DPCH users.

As shown in Figure 4, the above steps are described in detail, assuming that there are three F-DPCH channel codes (SF 256, x, SF 256, y, SF 256, z) in the cell that the F-DPCH user wants to access, and the user has no Specific time offset requirements, according to the above steps, first select SF256, x is the F-DPCH channel code of the user, because it currently shares the most users (6), that is, the symbol occupancy rate is the highest; due to the 1 of the F-DPCH channel code Symbols 1, 6, 8, and 9 are all idle, and symbol 9 has the lightest load (0), so symbol 9 is allocated to newly accessed F-DPCH users.

Through the description of the above embodiment, when accessing F-DPCH users, first judge the symbol occupancy rate of the F-DPCH channel code and the load of each symbol, and connect the F-DPCH users with the highest symbol occupancy rate and the symbol load The lightest F-DPCH channel code. This not only improves the utilization rate of the F-DPCH channel code, but also balances the load of the Uu port, and improves the system capacity and system stability to a certain extent.

As shown in Figure 5, in the method for allocating channel code resources provided by another embodiment of the present invention, for the F-DPCH users of the new link of soft handover, the allocation method of code words and symbols is as follows:

Step s501. Obtain the time offset of the original link of the user, and determine the symbol of the user according to the time offset. Specifically, since the user has a limit on the time offset, the user can only access the F-DPCH channel code that meets the time limit.

Step s502, judging whether there is an allocated F-DPCH channel code in the cell accessed by the user. If yes, execute step s503; otherwise, execute step s504.

Step s503, judging whether there is an idle F-DPCH channel code of the symbol among the allocated F-DPCH channel codes in the cell. If yes, execute step s505; otherwise, execute step s504.

Step s504, applying for a new F-DPCH channel code, and assigning symbols in the channel code satisfying the time offset to the user.

Step s505, among the F-DPCH channel codes satisfying the time offset condition, allocate the F-DPCH channel code with the highest symbol occupancy rate to the user. Specifically, the number of loads carried by symbols satisfying the time offset specified by the user is obtained, and the F-DPCH channel code with the highest symbol occupancy rate is allocated to the user.

In the above embodiments, F-DPCH channel resources are allocated respectively according to whether the user has a specific time offset requirement. For users without specific time offset requirements, first assign the F-DPCH channel code with the highest Symbol utilization rate, and then assign the Symbol with the lightest load; for users with specific time offset requirements (Symbol has been determined), The F-DPCH channel code with the highest Symbol utilization rate among the idle F-DPCH channel codes of the Symbol is assigned to it. In this way, appropriate F-DPCH channel codes and symbol numbers can be allocated to users, which saves code resources and power resources to the greatest extent, and at the same time balances the load of the Uu port.

At the same time, in order to implement the method provided by the embodiment of the present invention, the embodiment of the present invention also provides an apparatus for allocating channel code resources, as shown in FIG. 6 , including:

A judging module 610, configured to judge whether there is an assignable channel code;

The processing module 620 is configured to allocate a channel code for the pre-access user according to the judgment result of the judgment module, and when there is the channel code that can be allocated, obtain the symbol with the lightest load in the channel code for allocation; when When there is no channel code that can be allocated, apply for a new channel code.

The device also includes: a user type detection module 630, configured to detect the type of the pre-access user.

The processing module 620 includes:

The first processing sub-module 621 is configured to obtain the symbol with the lightest load among the channel codes for allocation when the judging module judges that there are channel codes that can be allocated and detects that the pre-access user is a new access user ;

The second processing sub-module 622 is configured to apply for a new channel code when the judging module judges that the channel code that can be allocated does not exist and detects that the pre-access user is a new access user.

The processing module 620 also includes:

The third processing sub-module 623 is configured to, when the judging module judges that there are channel codes that can be allocated and detects that the pre-access user is a new link user for soft handover, to include idle Symbols that meet the time offset requirement Channel codes are assigned;

The fourth processing sub-module 624 is configured to apply for a new channel code and acquire the new channel code when the judging module judges that there is no channel code that can be allocated and it detects that the pre-access user is a new link user for soft handover. Allocate the idle Symbols in the channel codes that meet the time offset requirements.

The method and device provided by the embodiment of the present invention not only significantly improve the utilization rate of the code word through the above steps, but also balance the load of the Uu port, and improve the system capacity and system stability to a certain extent.

Through the above description of the embodiments, those skilled in the art can clearly understand that the present invention can be realized by hardware, or by software plus a necessary general hardware platform. Based on this understanding, the technical solution of the present invention can be embodied in the form of software products, which can be stored in a non-volatile storage medium (which can be CD-ROM, U disk, mobile hard disk, etc.), including several The instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute the methods described in various embodiments of the present invention.

The above disclosures are only a few specific embodiments of the present invention, however, the present invention is not limited thereto, and any changes conceivable by those skilled in the art shall fall within the protection scope of the present invention.

Claims (9)

1. A method for allocating channel code resources, comprising: Judging whether there is an assignable channel code, specifically: judging whether the channel code has an idle Symbol; When there are channel codes that can be allocated, acquire the symbol with the lightest load in the channel codes for allocation; When there is no channel code that can be allocated, apply for a new channel code. 2. The method according to claim 1, wherein when the access user is a new link user for soft handover, determine the symbol type of the user according to the time offset of the original link of the user, and determine the available The allocated channel code includes the type symbol. 3. The method according to claim 1 or 2, wherein when there are multiple channel codes, the channel code that can be allocated with the highest symbol utilization is obtained. 4. The method according to claim 1, characterized in that, after the application for a new channel code when the access user is a new access user, further comprising: acquiring any symbol in the new channel code and performing distribute. 5. The method according to claim 2, wherein said determining said distributable channel code comprises said type symbol, comprising: judging whether there is an allocatable channel code including the type symbol; If it exists, acquire the symbol of the type with the lightest load in the channel code and allocate it; If there is no channel code that can be allocated, apply for a new channel code, and acquire the symbol of the type in the new channel code for allocation. 6. A device for allocating channel code resources, comprising: A judging module, configured to judge whether there is an assignable channel code, specifically: judging whether the channel code has an idle Symbol; A processing module, configured to allocate a channel code to a pre-access user according to the judgment result of the judgment module, and when there is the channel code that can be allocated, obtain the symbol with the lightest load in the channel code for allocation; When there are channel codes that can be allocated, apply for a new channel code. 7. The device of claim 6, further comprising: The user type detection module is used to detect the type of the pre-access user. 8. The device according to claim 6, wherein the processing module comprises: The first processing sub-module is used to obtain the symbol with the lightest load in the channel codes for allocation when the judging module judges that there are channel codes that can be allocated, and the pre-access user is detected as a new access user; The second processing submodule is configured to apply for a new channel code when the judging module judges that there is no channel code that can be allocated and it detects that the pre-access user is a new access user. 9. The device according to claim 6, wherein the processing module further comprises: The third processing submodule is used for, when the judging module judges that there is the channel code that can be allocated, and detects that the pre-access user is a new link user for soft handover, for the channel including the idle Symbol that meets the time offset requirement codes are assigned; The fourth processing submodule is used to apply for a new channel code and obtain the new channel code when the judging module judges that there is no channel code that can be allocated, and it detects that the pre-access user is a new link user for soft handover. Allocate idle Symbols in the channel code that meet the time offset requirements.

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