CN1805588A - Method of allocating cell resources - Google Patents

Abstract

The invention discloses a method for allocating cell resources to solve the problem in the prior art that high-priority users cannot access the cell when the cell resource is insufficient. The method is: calculating the cell resources required by the requesting user and the current allocatable resources of the cell of the base station; judging whether the allocatable resources meet the resource requirements of the requesting user, and if so, allowing the requesting user to access , otherwise release the users whose cell resources can be preempted in the cell of the base station, so that the allocatable resources of the cell of the base station meet the resource requirements of the requesting user; and then allow the requesting user to admit. By applying the method of the invention, differentiated services for users can be realized.

Description

A method for allocating cell resources

technical field

The invention relates to resource allocation technology in the field of mobile communication, in particular to a method for allocating cell resources.

Background technique

In the WCDMA cellular mobile communication system, to access a user, the radio network controller needs to allocate corresponding system resources such as power resources, code resources, and local cell resources for the user. In a cellular mobile communication system, resources related to the UU interface, such as power resources and code resources, are usually allocated within a cell range. Therefore, the allocation of these resources can generally be collectively referred to as cell resource allocation.

Among all cell resources, power resource and code resource are two kinds of resources that are relatively easy to be in short supply. This is because WCDMA is an interference-limited system, and the signal of any user in the system is far from the users of the same carrier frequency or adjacent carrier frequency. , are all interference signals, so the power of the user must be strictly controlled; on the other hand, the WCDMA system is a code division multiple access system, and its downlink channels are distinguished by a limited orthogonal variable spreading factor code (OVSF) Yes, in the case of a large business volume, limited code resources are often difficult to meet the demand. No matter the cell resource allocation failure caused by insufficient power resources, code resources or other cell resources will directly lead to user access failure.

When the resources of the cell are insufficient, the current prior art cannot enable other users to access.

Contents of the invention

The invention proposes a method for allocating cell resources to solve the problem in the prior art that high-priority users cannot access the cell when the cell resources are insufficient.

In order to solve the above problems, the present invention provides the following technical solutions:

A method for allocating cell resources, when a user initiates an access request to a cell through a base station, the following steps are performed:

A: Calculate the cell resources required by the requesting user and the current allocable resources of the cell of the base station;

B: judging whether the allocatable resources meet the resource requirements of the requesting user, if so, proceed to step D, otherwise proceed to step C;

C: releasing users in the cell of the base station that have occupied cell resources and can be preempted, so that the allocatable resources of the cell of the base station meet the resource requirements of the requesting users;

D: Allow the requesting user to admit and allocate cell resources to the requesting user.

According to the above method of the present invention, before step C is performed, it is judged whether the user has the ability to preempt, and if so, step C is performed; otherwise, the user is denied access.

According to the above method of the present invention, step C specifically includes the following steps:

c1: traverse all users in the cell of the base station, find out and sort the candidate user sets that can be preempted;

c2: Select the preempted user from the candidate user set, so that the resources of the preempted user plus the currently available resources of the base station cell meet the requirements of the requesting user;

c3: Release the above-mentioned users who can be preempted.

By using the method of the present invention, different services can be provided for low-priority users/high-priority users, low-priority services/high-priority services, and it is guaranteed that high-priority users and high-priority service users can preempt corresponding cells resources, thereby realizing differentiated services for users.

Description of drawings

Figure 1 is a flow chart of the method of the present invention.

Detailed ways

The method of the present invention will be further elaborated below in conjunction with the accompanying drawings of the description.

The main method of the present invention is to firstly calculate the cell resources required by the current requesting user, and judge whether the current cell's allocable resources (or remaining resources) can meet the needs of the current user, if the current allocable resources meet the current requesting user's needs, then Directly admit the user; otherwise, decide whether to trigger the preemption process according to the user's service capability and priority. If preemption is possible, calculate the cell resources corresponding to the user that needs to be preempted, release these resources and admit the current requesting user.

The resources that a user needs to apply for when accessing a cell mainly refer to one or a combination of code resources, uplink and downlink power resources, local cell resources, and local cell group resources. However, in an actual operating network, one or several resources may often be relatively tight (such as code resources), and other resources are relatively abundant. At this time, the preemption can be configured to be triggered only by code resources.

Whether the user has the ability to preempt and the user's priority information can be set by the system in the user's subscription information; if the user does not have the ability to preempt, the system will not assign other users with a lower priority than the user regardless of the user's priority level. The user cell resources; the priority level can be set according to the importance of the mobile user or other standards; the user's priority information and preemption capability information are set and saved in the system or in the user's SIM card. After the system initiates an access request, the system will distinguish the user's priority information and preemption capability information, and perform different operations based on different information. Similarly, the user's business priority can also be preset by the system.

If the user has the preemption ability, the system will determine the user who can be preempted according to the following principles:

(1) A user whose priority is lower than that of the current requesting user, or a user whose priority is equal to that of the current requesting user but whose service priority is lower than that of the current requesting service;

(2) The user whose business attribute is set to be preempted.

It is possible that the resources of the above-mentioned users identified will be far greater than the resources required when requesting user access, so the system can use the above-identified users as candidate users and sort them according to the following principles:

1. Put the Serving Radio Network Controller (SRNC) users in the front, and the Drift Radio Network Controller (DRNC) users in the back;

2. Sorting the SRNC and DRNC users respectively in ascending order of priority.

For SRNC users and DRNC users with the same priority, they are arranged in the order of single RAB users first and multi-RAB users last.

For single radio access bearer (RAB) users and multi-RAB users with the same priority, they are respectively arranged in descending order according to IUB interface resources. That is, for all users with the same priority and a single RAB, the more IUB resources occupied by the user, the higher the ranking. The multi-RAB service user is similar.

IUB interface resources actually refer to the bandwidth of the transport layer, usually E1 (1 E1 line 2M bit/s) bandwidth resources. When the mobile company leases the transmission lines of the telecommunications company, such resources are often relatively tight; the resources occupied by candidate users are actually the above-mentioned code resources, uplink and downlink power resources, local cell resources, and local cell group resources. SRNC, DRNC, single-RAB and multi-RAB users are distinguished because: single-RAB users have priority over multi-RAB users: 3G can largely be billed based on services, and the fewer preempted RABs, the greater the benefits earned by operators . However, the DRNC user indicates that the user has performed handover, and at this time, some information of the user may not be obtained, and it is not suitable to be preempted.

For example, there are 5 candidate users that meet the above conditions, namely User 1, User 2, User 3, User 4, and User 5; the priority information and service information of these five users and the users requesting access are shown in the following table , the user priority in the table indicates the type of calling user. Typical emergency calls such as fire alarm 119 have high priority, and telephone service calls (ordinary users) have low priority. The business priority is represented by numbers, and the larger the number, the lower the priority . user name user 1 user 2 user 3 user 4 user 5 user 0 user priority general user general user general user general user Emergency call(119) Ordinary users(119) mobile type SRNC SRNC SRNC DRNC SRNC -- RAB one many one many one -- business priority 4 5 5 3 2 1

Among them: "—" means no attention

According to the above principles and the priority and service information of each user in the above table, the ranking results of the users in the candidate user set are: user 3, user 2, user 1, user 5, and user 4.

After the users in the candidate set are arranged, the system searches for the first N users in the candidate set, so that the cell resources occupied by these N users plus the remaining resources in the current cell are greater than or equal to the resources required by the current requesting user; and the first N-1 users The occupied cell resources plus the remaining resources of the current cell are less than the resources required by the current requesting user.

An algorithm can be set for the above calculation, and the number of users satisfying the above conditions can be calculated according to this algorithm.

For example, after calculating the resources occupied by the first three users plus the above conditions of the remaining resources in the cell; then the base station controller releases the cell resources of the preempted users, that is, releases the cell resources occupied by user 3, user 2, and user 1. When this When all the resources of the three users are released, user 0 is admitted.

The following is an example of a mobile terminal user communicating in a WCDMA system. When a user initiates an access request through a base station cell, the specific implementation steps are as follows, as shown in Figure 1:

101: The base station controller calculates the cell resources required by the currently requesting user;

102: The base station controller calculates the current remaining resources of the cell;

103: The base station controller judges whether the current remaining resources of the cell meet the needs of the user, and if so, admits the requesting user and ends the process, otherwise proceeds to step 104;

104: The base station controller judges whether the user has the preemption capability, if not, rejects the requesting user access and ends the process, otherwise proceeds to step 105;

105: Determine a set of candidate users that can be preempted according to user priority information and service information;

106: Calculate the preempted low-priority users according to the resources required by the requesting user and the remaining resources of the current cell, and release the resources of these low-priority users;

107: After the resources of the low-priority user are released, admit the requesting user.

If, after calculation, the sum of resources occupied by users in all candidate sets plus the remaining resources in the current cell is less than the resources required by the current requesting user, then the user is denied admission. In the actual process, basically this will not happen. Therefore, by releasing cell resources occupied by low-priority users, high-priority users can preempt required resources, reflecting differentiated services for users.

By using the method of the present invention, different services can be provided for low-priority users/high-priority users, low-priority services/high-priority services, and it is guaranteed that high-priority users and high-priority service users can preempt corresponding cells resources, thereby realizing differentiated services for users.

The method of the present invention has been described above with specific examples, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily imagined by those skilled in the art within the technical scope disclosed in the present invention 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 (10)

1. A method for allocating cell resources, characterized in that, when a user initiates an access request to a cell through a base station, the following steps are performed: A: Calculate the cell resources required by the requesting user and the current allocable resources of the cell of the base station; B: judging whether the allocatable resources meet the resource requirements of the requesting user, if so, proceed to step D, otherwise proceed to step C; C: releasing users in the cell of the base station that have occupied cell resources and can be preempted, so that the allocatable resources of the cell of the base station meet the resource requirements of the requesting users; D: Allow the requesting user to admit and allocate cell resources to the requesting user. 2. The method according to claim 1, characterized in that: before performing step C, it is judged whether the requesting user has the preemption capability, and if so, proceeding to step C; otherwise, denying the requesting user access. 3. The method according to claim 2 or 3, characterized in that: step C specifically comprises the following steps: c1: traverse all users in the cell of the base station, find out and sort the candidate user sets that can be preempted; c2: Select the preempted user from the candidate user set, so that the resources of the preempted user plus the currently available resources of the base station cell meet the requirements of the requesting user; c3: Release the above-mentioned users who can be preempted. 4. The method according to claim 3, characterized in that: the users forming the candidate user set meet the following conditions: (1) The business attribute is preemptible; and (2) The priority is lower than that of the current requesting user, or the priority is the same as that of the current requesting user but the service priority is lower than that of the current requesting user. 5. The method according to claim 4, characterized in that the sorting of users in the candidate user set comprises the steps of: Serving Radio Network Controller (SRNC) users and Drift Radio Network Controller (DRNC) users are respectively sorted in ascending order of priority; All sorted SRNC users are arranged in front of DRNC users; 6. The method according to claim 5, wherein among SRNC users and DRNC users, users with the same priority are arranged in the order that single radio access bearer (RAB) users come first and multiple RAB users follow. 7. The method according to claim 6, wherein, for all single-RAB users and multi-RAB users of the same priority, they are respectively arranged in descending order according to the occupied IUB interface resources. 8. The method according to claim 3, characterized in that if the cell resources occupied by all users in the user set plus the remaining resources of the current cell are less than the resources required by the requesting user, the requesting user is denied admission. 9. The method according to claim 4, characterized in that: the service attribute information of whether the requesting user has the preemption capability and can be preempted is set by the system in the user subscription information; or, the user priority information is set by the system in the user Set in the contract information. 10. The method according to claim 1, characterized in that: said base station cell resources include but not limited to: one or some of code resources, uplink and downlink power resources, local cell resources and local cell group resources combination.

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