WO2013060159A1 - Baseband resource dynamic sharing method and device - Google Patents

Abstract

Disclosed is a baseband resource dynamic sharing method in a base station system, comprising: allocating initial baseband resources to carriers of each cell; determining, according to an actual demand for baseband resources of each cell, a cell and a carrier needing allocation or release of baseband resources; and allocating the baseband resources of the determined carrier to the cell or releasing the baseband resources of the determined carrier from the cell. Also disclosed is a baseband resource dynamic sharing device in a base station system. By means of the method and device in the present invention, baseband resources are shared among cells, and the baseband resources are allocated to the cells according to the actual demand for baseband resources of each cell, so that the inter-cell baseband resources are fully used, thereby saving baseband resources.

Description

 Method and device for dynamically sharing baseband resources

 The present invention relates to resource sharing technologies in mobile communications, and in particular to a method and apparatus for dynamically sharing baseband resources in a base station system. Background technique

 In the field of wireless communication, communication devices are gradually developing in the direction of distribution and modularization, especially protocol organizations such as the Common Public Radio Interface (CPRI) and the Open Base Station Architecture Initiative (OBSAI). The establishment of a separate baseband unit (BBU, Baseband Unit) and radio unit (RRU, Remote Radio Unit) has been rapidly developed and applied. The so-called separation structure between the BBU and the RRU is to divide the base transceiver station (BTS, Base Transceiver Station) into two parts: BBU and RRU; wherein, the BBU is composed of a baseband processing board (BP, Baseband Process), and multiple baseband resources are concentrated. Together, they form a baseband resource pool; the RRU is used to provide the RF processing function of the signal; the BBU and the RRU are connected by fiber, which constitutes the RF remote system architecture.

 Currently, in the industry's baseband resource allocation method, baseband resources and radio frequency resources are statically allocated, and baseband processing equipment and radio frequency units are corresponding. In the actual network environment, the distribution of services over time is very unbalanced. There are often tidal traffic phenomena between different communities and sites. As shown in Figure 1, users of working hours gather in the area where the office area 11 is located, such as : Central Business District (CBD, Central Business District), and a large number of users will move to the residential area 12 after work. As a result, a large amount of traffic flows in the communication system will occur, resulting in the maximum traffic volume of a community. It may be much larger than the average business volume.

The existing baseband resource allocation method is usually configured according to the maximum service capacity of the cell, but in reality, most of the time, the service cannot reach the maximum service capacity, and thus, most of the time is caused. The baseband resources of some cells in the room are wasted, and at the same time, the other base cells may have insufficient baseband resources. Summary of the invention

 In view of this, the main purpose of the present invention is to provide a method and an apparatus for dynamically sharing baseband resources, which can enable baseband resources to be shared among cells, and dynamically allocated according to actual demand of baseband resources of each cell, so that baseband resources between cells are enabled. Maximize utilization and save baseband resources.

 In order to achieve the above object, the technical solution of the present invention is achieved as follows:

 The present invention provides a method for dynamically sharing baseband resources in a base station system, the method comprising: allocating initial baseband resources for carrier frequencies of each cell; determining cells that need to allocate or release baseband resources according to actual demand conditions of baseband resources of each cell And the carrier frequency; the baseband resources of the determined carrier frequency are allocated or released for the cell.

 In the above solution, before the initial baseband resource is allocated to the carrier frequency of each cell, the method further includes: obtaining a priority of each carrier frequency, and determining, according to the obtained carrier frequency priority of each cell and a preset allocation rule. The carrier frequency of the cell allocates baseband resources.

 In the above solution, the method further includes: setting a normal allocation threshold and a normal release threshold, and setting a cycle timer;

 When the loop timer expires and the requirement of the baseband resource of the cell reaches the common allocation threshold, it is determined that the baseband resource needs to be allocated to the corresponding cell. When the loop timer expires and the requirement of the baseband resource of the cell reaches the normal release threshold, it is determined that The corresponding cell releases the baseband resources.

 In the above solution, the method further includes: setting an emergency allocation threshold and an emergency release threshold; determining that the baseband resource needs to be urgently allocated for the corresponding cell when the demand for the baseband resource of the cell reaches the emergency allocation threshold; When the threshold is released, it is determined that the baseband resource needs to be urgently released for the corresponding cell.

The present invention also provides an apparatus for dynamically sharing a baseband resource in a base station system, where the apparatus includes: a resource module, a service module, and an allocation module; a resource module, including all baseband resources required for execution of the business process, for allocation or release by the assigned module;

 a service module, configured to determine, according to actual demand conditions of the baseband resources of each cell, a cell and a carrier frequency that need to allocate or release the baseband resource, and initiate a request to the allocation module, and the cell and the carrier frequency notification allocation module that need to allocate or release the baseband resource ;

 And an allocation module, configured to allocate initial baseband resources for carrier frequencies of each cell; and after receiving the request of the service module, allocate or release baseband resources of the determined carrier frequency for the cell.

 In the above solution, the service module is configured with a common allocation threshold, a normal release threshold, and a loop timer. The service module is further configured to: when the loop timer expires, if the requirement of the baseband resource of the cell reaches a common allocation threshold. Or the normal release threshold, request to allocate or release the required baseband resources for the corresponding cell.

 In the above solution, the service module is configured with an emergency allocation threshold and an emergency release threshold. The service module is further configured to request emergency allocation of the corresponding cell when the demand of the baseband resource of the cell reaches an emergency allocation threshold or an emergency release threshold. Or the baseband resources needed for emergency release.

 In the above solution, the resource module is further configured to notify the allocation module of whether the baseband resource is successfully allocated or released when the baseband resource is allocated or released.

 In the above solution, the allocation module is further configured to acquire a priority of a carrier frequency of each cell, and allocate a baseband resource to a carrier frequency of each cell according to the obtained priority of each carrier frequency and a preset allocation rule.

The method and device for dynamically sharing a baseband resource provided by the present invention introduces a concept of a dynamic baseband resource pool, and does not use the prior art to permanently allocate a baseband resource carrying a maximum service capacity for each cell, but according to the traffic volume of each cell. The actual requirements dynamically configure the corresponding baseband resources, so that the baseband resources are dynamically shared between the cells, so as to maximize the utilization of the baseband resources between the cells, thereby solving the problem that some baseband resources are wasted while other baseband resources are insufficient; Can save costs. In addition, when the baseband processing board fails, the baseband resource can be dynamically allocated through the baseband pool, and the normal baseband resources are allocated to the corresponding cell of the faulty baseband processing board, and the faulty baseband processing board is retired, so that the base station can be made. The system is very fault tolerant. DRAWINGS

 Figure 1 is a schematic diagram of the tide traffic phenomenon;

 2 is a schematic flowchart of an implementation process of a baseband resource dynamic sharing method according to the present invention;

 3 is a schematic structural diagram of a baseband resource dynamic sharing device according to the present invention;

 4 is a schematic structural diagram of an application environment of a method for dynamically sharing a baseband resource according to an embodiment of the present invention; and FIG. 5 is a schematic flowchart of an implementation of an embodiment of a method for dynamically sharing a baseband resource according to the present invention. detailed description

 The basic idea of the present invention is: Introduce a dynamic baseband resource pool, dynamically configure corresponding baseband resources according to the actual demand of each cell traffic, so that baseband resources are dynamically shared between cells.

 FIG. 2 is a flowchart showing an implementation process of a method for dynamically sharing a baseband resource according to the present invention. As shown in FIG. 2, the method includes the following steps:

 Step 201: Allocating initial baseband resources for carrier frequencies of each cell;

 Here, the allocating the initial baseband resource may be to allocate the initial baseband resource for the carrier frequency carrying the maximum traffic amount in the existing manner; or to allocate the initial baseband to the preset carrier frequency not less than the minimum traffic volume. Resources. For example, if the maximum traffic of cell A requires 20 carrier frequencies and the minimum traffic requires 6 carrier frequencies, then the initial baseband resources may be allocated for 20 carrier frequencies first, or the bearer traffic may be greater than Equal to 6, the preset carrier frequency is allocated initial baseband resources, such as: The initial baseband resources are allocated for 10 carrier frequencies.

In this step, baseband resources may be allocated according to different priorities of carrier frequencies of respective cells and pre-set allocation rules. Specifically, priority of carrier frequencies of each cell is obtained first, and then according to obtained carrier frequency of each cell. Priority and pre-set allocation rules for the carrier frequency allocation base of each cell With a resource; where, each cell includes more than two cells; the preset allocation rule may be cell polling, or cell preference, and the like.

 Step 202: Determine, according to actual demand conditions of the baseband resources of each cell, a cell and a carrier frequency that need to allocate or release baseband resources.

 Here, the actual demand situation of the baseband resources of each cell may be obtained based on the cell traffic statistics method or the channel occupancy method, but is not limited to the above two methods.

 For example, in the actual application of the Global System For Mobile Communications (GSM), the BTS detects the current traffic or channel occupancy of each cell in real time and reports it to the base station controller (BSC, Base Station). The controller determines, according to the traffic volume or channel occupancy, the current baseband resource requirement of each cell, and determines and requests the BTS to allocate or release the carrier frequency of the baseband resource according to the baseband resource requirement of each cell. For example: In the initial allocation, the office area and the residential area are allocated 10 baseband resources of the carrier frequency. After statistics, it is determined that the current office area only needs 6 carrier frequencies, and the residential area needs 14 carrier frequencies. Then, the BSC will notify the BTS. The baseband resources of the four carrier frequencies allocated to the cells corresponding to the office area are released, and the baseband resources of the four carrier frequencies released by the office area are allocated to the cells corresponding to the residential area.

 In this step, in order to prevent the problem of repeatedly requesting allocation or release of baseband resources, that is, to avoid ping-pong phenomenon, two thresholds may be set in advance: a common allocation threshold and a normal release threshold; specifically, a common allocation threshold may be set and an ordinary When the threshold is set, the loop timer is set, and when the loop timer expires and the requirement of the baseband resource of the cell reaches the common allocation threshold, it is determined that the baseband resource needs to be allocated for the corresponding cell; when the loop timer expires, and the baseband resource of the cell When the demand situation reaches the normal release threshold, it is determined that the baseband resource needs to be released for the corresponding cell; thus, the baseband resource and the baseband resource are frequently allocated in the case of temporary traffic fluctuation.

 Further, after allocating or releasing the baseband resources, the loop timer is also reset.

In addition, considering that due to some special circumstances, it may cause the traffic or channel occupancy peak to rise. Or a sudden drop, therefore, the other two thresholds may be set: an emergency allocation threshold and an emergency release threshold; further, when the demand for the baseband resource of the cell reaches the emergency allocation threshold, it is determined that the baseband resource needs to be urgently allocated for the corresponding cell; When the demand situation of the baseband resource reaches the emergency release threshold, it is determined that the baseband resource needs to be urgently released for the corresponding cell.

 In general, the emergency allocation threshold is greater than the normal allocation threshold; the emergency release threshold is greater than the normal release threshold.

 Step 203: Allocate or release a baseband resource of the determined carrier frequency for the cell.

 Here, the cell is a cell in step 202 that needs to allocate or release baseband resources. To implement the above method, the present invention further provides a baseband resource dynamic sharing device. As shown in FIG. 3, the device includes: a resource module 31, a service module 32, and an allocation module 33. The resource module 31 includes a service flow execution. All baseband resources required at the time, equivalent to a dynamic baseband resource pool, for allocation or release by the allocation module 33;

 The service module 32 is configured to determine, according to the actual demand situation of the baseband resources of each cell, a cell and a carrier frequency that need to allocate or release the baseband resource, and initiate a request to the allocating module 33, and notify the cell and the carrier frequency that need to allocate or release the baseband resource. Distribution module 33;

 Here, when it is determined that the cell needs the baseband resource, the request for allocating the baseband resource is initiated to the allocating module 33; when the cell does not need the baseband resource, the request for releasing the baseband resource is initiated to the allocating module 33; the request carries the need to allocate or release the baseband The cell and carrier frequency of the resource.

 In an actual application, in order to avoid frequently requesting to allocate or release the baseband resource, the service module 32 may set a common allocation threshold, a normal release threshold, and a loop timer; correspondingly, the service module 32 is further used in the loop. When the timer expires, if the requirement of the baseband resource of the cell reaches the normal allocation threshold or the normal release threshold, the request is to allocate or release the required baseband resource for the corresponding cell.

In order to prevent the traffic volume or the channel occupancy peaking or the sudden drop, the service module 32 may also set two other thresholds: an emergency allocation threshold and an emergency release threshold; correspondingly, the service module 32. The method is further configured to: when the demand for the baseband resource of the cell reaches the emergency allocation threshold, request the emergency allocation of the required baseband resource for the corresponding cell; when the demand for the baseband resource of the cell reaches the emergency release threshold, request the emergency release of the corresponding cell. Baseband resources required.

 The allocating module 33 is configured to allocate initial baseband resources for the carrier frequency of each cell; after receiving the request of the service module 32, allocate or release the baseband resource of the determined carrier frequency for the cell; wherein, the cell is a service module 32 determined cells that need to allocate or release baseband resources.

 Further, the resource module 31 is further configured to notify the allocation module 33 of whether the baseband resource is successfully allocated or released when the baseband resource is allocated or released;

 Further, the resource module 31 is further configured to report the change of the baseband resource to the service module 32 when the baseband resource is allocated or released.

 Further, the allocating module 33 is further configured to obtain a priority of a carrier frequency of each cell, and allocate a baseband resource to a carrier frequency of each cell according to the obtained priority of each carrier frequency and a preset allocation rule.

 FIG. 4 and FIG. 5 respectively show an application environment component mechanism and an implementation process according to an embodiment of the present invention. This embodiment is implemented based on the GSM system.

 As shown in FIG. 4, the GSM system includes a BTS 402 and a BSC 401. The BTS 402 further includes a BBU and an RRU. In this embodiment, the service module is implemented by the BSC 401, and the allocation module and the resource module are implemented by the BTS 402.

 Specifically, the BSC 401 is configured to determine, according to an actual demand situation of the baseband resources of each cell, a cell and a carrier frequency that need to allocate or release the baseband resource, and initiate a baseband resource allocation or release request to the BTS 402, which needs to be allocated or released. The cell and carrier frequency of the baseband resource is notified to the BTS 402; wherein, the actual demand situation refers to: statistics on cell traffic, or statistics on channel occupancy.

The BTS 402 is configured to allocate initial baseband resources for carrier frequencies of each cell; after receiving the request of the BSC 401, allocate or release baseband resources of the determined carrier frequency for cells requiring baseband resources; The current traffic or channel occupancy of each cell is detected and reported to the BSC 401.

 Further, the BTS 402 will assign the release or release success to the BSC 401. In this embodiment, after the baseband resources are dynamically shared, the baseband resources can be shared between different RBR sites in different cells under the same BTS site.

 In practical applications, the dynamic sharing function of the baseband resource may be a software module, and the software module may belong to the BBU software system in part, and the other part belongs to the BSC software system, that is, one part is implemented in the BBU of the BTS, and the other part is in the BBU. Implemented in the BSC; the software modules can all belong to the BBU software system, that is, all are implemented in the BBU of the BTS.

 The implementation process of the baseband resource dynamic sharing method in this embodiment is as shown in FIG. 5, and the method includes the following steps:

 Step 501: Acquire a carrier frequency priority of each cell before initially allocating baseband resources; where, it may be two or more cells.

 Step 502: Allocate initial baseband resources for carrier frequencies of each cell according to the obtained carrier frequency priority and a preset preset rule.

 Here, the initial baseband resource may be allocated for the carrier frequency of each cell carrying the maximum traffic; the initial baseband resource may also be allocated for the carrier frequency of each cell not less than the minimum requirement.

 Steps 503 - 510: The current baseband resource requirement of each cell is counted, and according to the set threshold and the round-robin timer, it is determined whether the baseband resource needs to be allocated or released for the cell.

 The loop timer is only used for the normal allocation threshold and the normal release threshold to determine whether the baseband resource needs to be allocated or released when the loop timer expires. The emergency allocation threshold and the emergency release threshold are specifically set for emergency or emergency events. Therefore, it is not limited by the loop timer, ie: it is independent of the loop timer setting.

Specifically, a loop timer, a normal allocation threshold, a normal release threshold, an emergency allocation threshold, and an emergency release threshold may be preset. Of course, in practical applications, only the general settings can be set as needed. One of the distribution threshold and the normal release threshold, the emergency allocation threshold, and the emergency release threshold, or both groups are set; and when the normal allocation threshold and the normal release threshold are set, the cycle timer is set at the same time.

 The current baseband resource requirement of each cell may be calculated according to the algorithm of the traffic volume of the cell, for example, calculating the traffic volume by using the traffic channel (TCH, Traffic Channel) occupation time/available TCH number*900; The channel occupancy method can be used for statistics, such as: the ratio of the number of occupied TCHs to the number of available TCHs within 15 minutes, but is not limited to the above two statistical methods.

 The step of determining whether a baseband resource needs to be allocated or released for a cell includes:

 For the common allocation threshold and the normal release threshold, since the loop timer is set at the same time, if the loop timer expires, the subsequent operation is performed. If the loop timer expires, it is determined whether the demand of the baseband resource reaches the normal allocation threshold. If the normal release threshold is reached, the required baseband resources are allocated for the carrier frequency of the corresponding cell. If the normal release threshold is reached, the required baseband resources are released for the carrier frequency of the corresponding cell. If the loop timer has not timed out, it continues to wait for the loop timer to time out; if the loop timer expires and does not reach any of the thresholds, no processing is performed.

 For the emergency allocation threshold and the emergency release threshold, there is no need to consider the loop timer, that is, whether or not the loop timer is set, regardless of whether the set loop timer expires, step 505 and step 506 are directly executed after step 503, respectively, Whether the emergency allocation threshold is reached and whether the emergency release threshold is reached. If the emergency allocation threshold is reached, the required baseband resources are allocated for the carrier frequency of the corresponding cell; if the emergency release threshold is reached, the required baseband resources are released for the carrier frequency of the corresponding cell. .

 In practical applications, one or more of the above four thresholds may be determined according to actual needs, and may be judged sequentially or simultaneously.

Further, when determining that the baseband resource needs to be allocated to the cell, it is also necessary to determine whether there are enough baseband resources in the dynamic baseband resource pool for allocation, and if there are enough free baseband resources, The corresponding baseband resources are directly allocated. If there is not enough free baseband resources, it can be determined whether there is a baseband resource that currently reaches the emergency release threshold. If yes, the baseband resources that reach the emergency release threshold are released first, and then the released baseband resources are allocated. Give the required cell, if not, return a message to the cell that the baseband resource cannot be allocated.

 By adopting the scheme of the present invention, the baseband resources can be dynamically shared, thereby maximizing the utilization of the baseband resources. Specifically, for the tidal traffic phenomenon that is prevalent in the city, the time-distributed traffic is unbalanced, that is, the traffic in the office area is relatively concentrated during working hours, the office traffic is lower after work, and the traffic in the residential area is rising. The situation can be solved very well. Assumption: The office area and residential area need to allocate 18 carrier frequency baseband resources at the most, and at least 6 carrier frequency baseband resources need to be configured. Then, if the prior art scheme is adopted, both regions need to have the carrier frequency according to the maximum demand. The corresponding baseband resources are configured, that is, the baseband resources of the 18 carrier frequencies are respectively allocated in the two regions, and the baseband resources of the carrier frequency are totaled by 36. The baseband resource dynamic sharing scheme of the present invention is used to configure the carrier baseband resources of the two regions. The sum of the maximum values of the baseband resources of the carrier frequency required for the two regions at the same time may be: baseband resources of 18 carrier frequencies in the office area during working hours, and baseband resources of 6 carrier frequencies in the residential area; The base station resources of 6 carrier frequencies are allocated in the area, and the baseband resources of 18 carrier frequencies are allocated in the residential area; that is, the baseband resources of 24 carrier frequencies need to be configured. Obviously, the baseband resources of 12 carrier frequencies are saved, and the cost is greatly reduced; and the baseband resources of 24 carrier frequencies are maximized.

 The above is only the preferred embodiment of the present invention, and is intended to illustrate and explain the present invention. It is not obvious to those skilled in the art that the present invention is not limited to the embodiments shown herein. For example, it should be based on the broadest scope of the principles and novel features disclosed herein.

Claims

Claim  A method for dynamically sharing a baseband resource, the method comprising: allocating an initial baseband resource for a carrier frequency of each cell;  Determining the cell and carrier frequency that need to allocate or release the baseband resource according to the actual demand situation of the baseband resources of each cell;  The baseband resources of the determined carrier frequency are allocated or released for the cell.  The method according to claim 1, wherein before the allocating the initial baseband resources for the carrier frequency of each cell, the method further includes:  The priority of the carrier frequency of each cell is obtained, and the baseband resource is allocated to the carrier frequency of each cell according to the obtained priority of the carrier frequency of each cell and a preset allocation rule.  3. The method according to claim 1, wherein the method further comprises: setting a normal allocation threshold and a normal release threshold, and setting a loop timer; correspondingly,  When the loop timer expires and the requirement of the baseband resource of the cell reaches the common allocation threshold, it is determined that the baseband resource needs to be allocated to the corresponding cell. When the loop timer expires and the requirement of the baseband resource of the cell reaches the normal release threshold, it is determined that The corresponding cell releases the baseband resources.  The method according to claim 1 or 3, further comprising: setting an emergency allocation threshold and an emergency release threshold; correspondingly,  When the demand for the baseband resource of the cell reaches the emergency allocation threshold, it is determined that the baseband resource needs to be urgently allocated for the corresponding cell. When the demand of the baseband resource of the cell reaches the emergency release threshold, it is determined that the baseband resource needs to be urgently released for the corresponding cell.  5. A device for dynamically sharing a baseband resource, the device comprising: a resource module, a service module, and an allocation module;  a resource module, including all baseband resources required for the execution of the business process, for allocation or release by the allocated module; a service module, configured to determine, according to the actual demand situation of the baseband resources of each cell, Or releasing the cell and the carrier frequency of the baseband resource, and initiating a request to the allocation module, and the cell and the carrier frequency notification allocation module that need to allocate or release the baseband resource;  And an allocation module, configured to allocate initial baseband resources for the carrier frequency of each cell; and after receiving the request of the service module, allocate or release a baseband resource of the carrier frequency determined by the service module for the cell.  The device according to claim 5, wherein the service module is provided with a common allocation threshold, a normal release threshold, and a loop timer; correspondingly,  The service module is further configured to request, when the cyclic timer expires, that the required condition of the baseband resource of the cell reaches a common allocation threshold or a normal release threshold, requesting to allocate or release the required baseband resource for the corresponding cell.  The device according to claim 5, wherein the service module is provided with an emergency allocation threshold and an emergency release threshold; correspondingly,  The service module is further configured to request, when the demand condition of the baseband resource of the cell reaches an emergency allocation threshold or an emergency release threshold, request the baseband resource required for emergency allocation or emergency release of the corresponding cell.  The device according to claim 5, 6 or 7, wherein the resource module is further configured to notify the allocation module of whether the baseband resource is successfully allocated or released when the baseband resource is allocated or released.  The device according to claim 5, 6 or 7, wherein the allocation module is further configured to acquire a priority of a carrier frequency of each cell, according to the obtained priority of each carrier frequency of the cell and a preset The allocation rule allocates baseband resources for the carrier frequencies of the cells.