CN107787043B - Downlink scheduling method and device - Google Patents
Downlink scheduling method and device Download PDFInfo
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- CN107787043B CN107787043B CN201610721164.2A CN201610721164A CN107787043B CN 107787043 B CN107787043 B CN 107787043B CN 201610721164 A CN201610721164 A CN 201610721164A CN 107787043 B CN107787043 B CN 107787043B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W72/044—Wireless resource allocation based on the type of the allocated resource
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- H04W72/12—Wireless traffic scheduling
- H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
- H04W72/1273—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of downlink data flows
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Abstract
The invention relates to the communication field, in particular to a downlink scheduling method and a device, wherein the method comprises the steps that a base station establishes a logic cell aiming at all downlink cluster group calling services and allocates a first frequency domain resource for the logic cell; the base station schedules all downlink cluster group call services in the logic cell respectively based on the first frequency domain resource to obtain resource allocation results corresponding to all downlink cluster group call services; the base station respectively sends downlink service data of all downlink cluster group calling services to the terminal by adopting a preset scrambling mode according to the respective corresponding resource allocation results of all downlink cluster group calling services, thus solving the interference problem of downlink scheduling and simultaneously bringing receiving gain to the cluster terminal.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a downlink scheduling method and apparatus.
Background
In a Long Term Evolution (LTE) Trunking system, according to a Broadband Trunking communication (B-TrunC) standard proposed by the current China Communication Standards Association (CCSA) organization, a Trunking base station needs to support scheduling of a unicast service and a multicast service simultaneously in the same downlink Transmission Time Interval (TTI), and for a plurality of multicast services, each multicast service needs to perform multicast in a plurality of cells of the same Trunking base station. Since the downlink Trunking group call service is a point-to-multipoint service, in order to save air interface resources, a group shared Channel is proposed in the standard, that is, multiple terminals in the same group share the same Trunking Control Channel (TCCH) and Trunking Traffic Channel (TTCH), the TCCH and TTCH are both mapped to a downlink shared Channel (DL-SCH), and meanwhile, a Trunking Paging Control Channel (TPCCH) and a Trunking Paging transport Channel (TPCH) are added to the B-trunk c for Trunking Paging, and a specific Channel mapping relationship is shown in fig. 1.
When each downlink cluster group call service is established, the core network is established by taking a Tracking Area (TA) as a unit, the TA is identified by a TA Code (TAC), one TA may include one or more cells, each downlink cluster group call service establishes a cluster group call bearer TDRB, each cluster group call bearer is mapped to a TTCH, and since the TTCH is also mapped to a DL-SCH, a cluster base station needs to consider how to schedule the downlink cluster group call service.
In the prior art, in an LTE trunking system, a downlink scheduling method is, according to a traditional Media Access Control (MAC) downlink scheduling method, when performing downlink scheduling, an MAC layer of each cell needs to consider all Resource Blocks (RBs) with Data transmission (Data Radio bearers (DRBs) or TDRBs), queue the RBs with Data transmission according to a certain principle, collect the queued RBs to a User Equipment (User Equipment, UE) or a priority of a group, perform scheduling according to the priority of the UE or the group, and then perform Resource allocation on the scheduled UE or the group by each cell.
Referring to fig. 2, if there are two cells 1 and 2 under the LTE trunking base station, there is one UE under each cell, respectively, UE1 and UE2, the core network establishes two trunking Group calls Group1 and Group2, and the TAs establishing the two trunking Group calls cover the two cells cell1 and cell2, the scheduling process is specifically shown in fig. 2, and cell1 and cell2 schedule the trunking Group call services of Group1 and Group2, respectively.
Therefore, in the prior art, both the cell1 and the cell2 in the scheduling method need to perform scheduling and resource allocation for the Group call services of Group1 and Group2, because the scheduling is performed together with the non-Group call service, the scheduling results of the Group call services of Group1 and Group1 by each cell are different, the allocated resources are also different, the repeated resource allocation increases the processing complexity of the LTE Group base station, and under the condition of co-frequency networking, the edge Group terminal is easily subjected to greater co-frequency interference when receiving the Group call service.
Disclosure of Invention
The embodiment of the invention provides a downlink scheduling method and a downlink scheduling device, which are used for solving the problems that the scheduling of LET downlink cluster group call service is complex and interference is easy to cause in the prior art.
The embodiment of the invention provides the following specific technical scheme:
a downlink scheduling method comprises the following steps:
a base station establishes a logic cell aiming at all downlink cluster group calling services and allocates a first frequency domain resource for the logic cell;
the base station schedules all downlink cluster group call services in the logic cell respectively based on the first frequency domain resource to obtain resource allocation results corresponding to all the downlink cluster group call services;
and the base station respectively sends the downlink service data of all the downlink cluster group calling services to the terminal by adopting a preset scrambling mode according to the respective corresponding resource allocation results of all the downlink cluster group calling services.
Preferably, further comprising:
and the base station schedules the downlink non-cluster group call service respectively based on the second frequency domain resources except the first frequency domain resources.
Preferably, further comprising:
if the base station still has the remaining first frequency domain resources after finishing scheduling all the downlink trunking group call services in the logical cell, the base station continues to schedule the downlink non-trunking group call services respectively based on the remaining first frequency domain resources; or the like, or, alternatively,
and if the base station still has the residual second frequency domain resources after finishing the scheduling of the downlink non-trunking group call service, the base station continues to schedule the downlink trunking group call service respectively based on the residual second frequency domain resources.
Preferably, the base station sends the downlink service data of all downlink trunking group call services to the terminal in a preset scrambling mode according to the respective corresponding resource allocation results of all downlink trunking group call services, and the method specifically includes:
the base station respectively determines physical cells corresponding to all downlink cluster group call services according to a mapping relation between a preset TA and the physical cells;
and the base station respectively sends the downlink service data of all the downlink trunking group calling services to the terminal by adopting a preset scrambling mode through respective corresponding physical cells according to the respective corresponding resource allocation results of all the downlink trunking group calling services.
Preferably, the base station sends the downlink service data of all downlink trunking group call services to the terminal through respective corresponding physical cells by using a preset scrambling mode according to respective corresponding resource allocation results of all downlink trunking group call services, and specifically includes:
the base station determines each group to which all the downlink cluster group call services belong according to all the downlink cluster group call services, and determines a G-RNTI (radio network temporary identifier) for each group;
the base station determines a PCI according to a preset rule aiming at all the downlink cluster group calling services;
and the base station scrambles the downlink service data of all the downlink trunking group calling services respectively according to the determined G-RNTI and the PCI, and transmits the scrambled downlink service data to the terminal through the corresponding physical cells respectively according to the resource allocation results corresponding to all the downlink trunking group calling services.
A downlink scheduling apparatus, comprising:
the distribution unit is used for establishing a logic cell aiming at all downlink cluster group calling services and distributing first frequency domain resources for the logic cell;
a scheduling unit, configured to schedule all downlink trunking group call services in the logical cell based on the first frequency domain resource, respectively, to obtain resource allocation results corresponding to all downlink trunking group call services;
and the sending unit is used for sending the downlink service data of all the downlink trunking group calling services to the terminal by adopting a preset scrambling mode according to the respective corresponding resource allocation results of all the downlink trunking group calling services.
Preferably, the scheduling unit is further configured to:
and scheduling the downlink non-cluster group call service based on second frequency domain resources except the first frequency domain resources.
Preferably, the scheduling unit is further configured to:
if the first frequency domain resources remain after all the downlink trunking group calling services in the logic cell are respectively scheduled, continuing to schedule the downlink non-trunking group calling services respectively based on the remaining first frequency domain resources; or the like, or, alternatively,
and if the second frequency domain resources are remained after the downlink non-cluster group call service is scheduled, respectively scheduling the downlink cluster group call service based on the remained second frequency domain resources.
Preferably, when the downlink service data of all the downlink trunking group call services are respectively sent to the terminal by using a preset scrambling mode according to the respective corresponding resource allocation results of all the downlink trunking group call services, the sending unit is specifically configured to:
respectively determining physical cells corresponding to all downlink cluster group call services according to a mapping relation between a preset TA and the physical cells;
and respectively sending the downlink service data of all the downlink trunking group calling services to a terminal by adopting a preset scrambling mode through respective corresponding physical cells according to respective corresponding resource allocation results of all the downlink trunking group calling services.
Preferably, when the downlink service data of all the downlink trunking group call services are respectively sent to the terminal by using a preset scrambling mode through respective corresponding physical cells according to respective corresponding resource allocation results of all the downlink trunking group call services, the sending unit is specifically configured to:
determining each group to which all downlink trunking group calling services belong according to all downlink trunking group calling services, and respectively determining a G-RNTI (radio network temporary identifier) for each group;
determining a PCI according to a preset rule aiming at all downlink cluster group calling services;
and scrambling the downlink service data of all the downlink trunking group calling services respectively according to the determined G-RNTI and the PCI, and sending the scrambled downlink service data to the terminal through respective corresponding physical cells according to respective resource allocation results of all the downlink trunking group calling services.
The invention has the following beneficial effects:
in summary, in the embodiment of the present invention, a base station establishes a logical cell for all downlink trunking group call services, and allocates a first frequency domain resource to the logical cell; the base station schedules all downlink cluster group call services in the logic cell respectively based on the first frequency domain resource to obtain resource allocation results corresponding to all the downlink cluster group call services; the base station respectively sends the downlink service data of all the downlink cluster group call services to the terminal by adopting a preset scrambling mode according to the resource allocation results respectively corresponding to all the downlink cluster group call services, so that the downlink cluster group call services can be uniformly scheduled, different downlink cluster group call services have different resource allocation results, and the interference among different downlink cluster group call services is avoided; and the same downlink trunking group calling service can obtain the same resource allocation result, and the same scrambling mode is adopted for the downlink service data of the same downlink trunking group calling service, so that the same scrambled downlink service data can be obtained, and the receiving gain is brought to the trunking terminal under the condition of avoiding interference.
Drawings
FIG. 1 is a diagram illustrating a channel mapping relationship in the prior art;
fig. 2 is a schematic diagram of a downlink scheduling process in the prior art;
fig. 3 is a flowchart of a downlink scheduling method in an embodiment of the present invention;
fig. 4 is a schematic diagram illustrating a processing procedure of a downlink physical channel of a physical layer in an embodiment of the present invention;
fig. 5 is a schematic diagram of a downlink scheduling process in the embodiment of the present invention;
fig. 6 is a schematic structural diagram of a downlink scheduling apparatus in an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to solve the problem that scheduling of downlink trunking group call services is complex and interference is easily caused in an LET trunking system in the prior art, in the embodiment of the invention, a base station establishes a logical cell, all downlink trunking group call services are classified into the logical cell, a first frequency domain resource is allocated to the logical cell, the base station schedules the downlink trunking group call services in the logical cell respectively based on the first frequency domain resource to obtain respective corresponding resource allocation results, and downlink service data are sent to a terminal by adopting a preset scrambling mode according to the respective corresponding resource allocation results.
The present invention will be described in detail with reference to specific examples, but it is to be understood that the present invention is not limited to the examples.
It should be noted that the embodiments of the present invention mainly refer to an LTE trunking system, and therefore, for convenience of description, a base station in the embodiments of the present invention, that is, an LTE trunking base station, is described below with reference to the base station.
Referring to fig. 3, in the embodiment of the present invention, a specific flow of the downlink scheduling method is as follows:
step 100: the base station establishes a logic cell aiming at all downlink cluster group calling services, and allocates a first frequency domain resource for the logic cell.
In the embodiment of the invention, aiming at the trunking group calling service, different physical cells are not required to be respectively scheduled, but a logic cell is established, all downlink trunking group calling services are classified into the logic cell, all downlink trunking group calling services under the base station are scheduled under the logic cell, and the unified scheduling of the downlink trunking group calling services is realized.
When step 100 is executed, the method specifically includes:
firstly, a base station establishes a logic cell for all downlink cluster group calling services.
In this way, in order to implement unified scheduling of all downlink trunking group call services under the base station, the logical cell has no other actual meaning, and does not need other configurations, and is only a logical concept.
The base station then allocates a first frequency domain resource for the logical cell.
And the first frequency domain resource is used for resource allocation of a scheduling result of the logic cell.
Further, the base station allocates a second frequency domain resource for the physical cell in addition to the first frequency domain resource. The physical cell is relative to the logical cell, that is, the cell actually established under the base station in communication.
And the second frequency domain resource is used for resource allocation of the scheduling result of the physical cell.
The method specifically comprises the following steps: the base station divides the total bandwidth into two parts: f1 and F2, where F1 is the first frequency domain resource and F2 is the second frequency domain resource.
The base station allocates an individual first frequency domain resource to the logical cell because the logical cell is not actually configured, and the scheduling result of the logical cell, i.e., the resource allocation result, must also be sent to the trunking terminal by the physical cell from the air interface.
Step 110: and the base station schedules all downlink cluster group call services in the logic cell respectively based on the first frequency domain resource to obtain resource allocation results corresponding to all the downlink cluster group call services.
Further, the base station schedules the downlink non-trunking group call service respectively based on a second frequency domain resource except the first frequency domain resource, that is, schedules the single call service in the physical cell.
That is, the base station schedules the downlink trunking group call service in the logical cell and schedules the downlink non-trunking group call service in the physical cell.
It should be noted that how the base station schedules all downlink trunking group call services in the logical cell and how to schedule all downlink non-trunking group call services in the physical cell may adopt a scheduling algorithm in the prior art, for example, a polling algorithm, a proportional fairness algorithm, and the like, which is not limited in the embodiment of the present invention.
Further, the scheduling of the downlink trunking group call service may also adopt a second frequency domain resource, and the scheduling of the downlink non-trunking group call may also adopt a first frequency domain resource, which is specifically divided into the following two cases:
in the first case: if the base station still has the remaining first frequency domain resources after finishing scheduling all the downlink trunking group call services in the logical cell, the base station continues to schedule the downlink non-trunking group call services respectively based on the remaining first frequency domain resources.
In the second case: and if the base station still has the residual second frequency domain resources after finishing the scheduling of the downlink non-trunking group call service, the base station continues to schedule the downlink trunking group call service respectively based on the residual second frequency domain resources.
The specific implementation can divide the whole scheduling process into two rounds:
the first round of scheduling is: the logical cell carries out scheduling downlink trunking group calling service in the first frequency domain resource, and the physical cell carries out scheduling downlink non-trunking group calling service in the second frequency domain resource.
The second round of scheduling is: if the first frequency domain resources are remained and all the downlink non-trunking group call services cannot be scheduled in the first round of scheduling, namely the second frequency domain resources are not enough to schedule all the downlink non-trunking group call services, the non-scheduled downlink non-trunking group call services can be continuously scheduled based on the remained first frequency domain resources;
similarly, if there are remaining second frequency domain resources and all downlink trunking group call services cannot be scheduled in the first round of scheduling, that is, the first frequency domain resources are not enough to schedule all downlink trunking group call services, then the non-scheduled downlink trunking group call services may be continuously scheduled based on the remaining second frequency domain resources.
Further, when the first round of scheduling is performed, all scheduling of the downlink trunking group call service and/or the downlink non-trunking group call service is already completed, and a corresponding process of the second round of scheduling does not need to be executed.
Therefore, when the downlink trunking group calling service and the downlink non-trunking group calling service are simultaneously scheduled in one TTI, the frequency domain resource in one TTI can be fully utilized, and the waste of resources is avoided.
After step 110 is executed, the comprehensive scheduling of the downlink trunking group call service and the downlink non-trunking group call service in the base station is completed, and since all the downlink trunking group call services are scheduled uniformly, the frequency domain resources of different downlink trunking group call services in the same base station in one TTI are different, thereby avoiding the interference between different downlink trunking group call services in the base station.
And the base station uniformly schedules all downlink cluster group call services in the logic cell based on the first frequency domain resource, and the same downlink cluster group call service is only scheduled aiming at the same downlink cluster group call service without distinguishing whether the same downlink cluster group call service is in different physical cells, so that the same downlink cluster group call service in one base station is distributed with the same time frequency resource in different physical cells under the base station.
Step 120: and the base station respectively sends the downlink service data of all the downlink trunking group calling services to the terminal by adopting a preset scrambling mode according to the respective corresponding resource allocation results of all the downlink trunking group calling services.
When the step 120 is executed, the method specifically includes:
firstly, the base station respectively determines the physical cells corresponding to all the downlink cluster group call services according to the mapping relationship between the preset TA and the physical cells.
In practice, each downlink cluster group call service is established by using a TA as a unit, and the base station side also performs data configuration to obtain a mapping relationship between the TA and the physical cell.
Because the logical cell cannot send the air interface data, the corresponding physical cell must be found first, and the physical cell sends the downlink service data of the downlink trunking group call to the trunking terminal from the air interface.
Then, the base station sends the downlink service data of all the downlink trunking group call services to the terminal by using a preset scrambling mode through respective corresponding physical cells according to the respective corresponding resource allocation results of all the downlink trunking group call services, which specifically comprises:
1) the base station determines each Group to which all downlink trunking Group call services belong according to all downlink trunking Group call services, and determines a Group-radio network Temporary Identifier (G-RNTI) for each Group.
That is, one group may have multiple downlink trunking group call services, the base station only allocates one G-RNTI for the same group, and each group allocates one G-RNTI, so that each physical cell uses the same G-RNTI when scrambling downlink service data of the downlink trunking group call services in the same group.
2) The base station determines a Physical Cell Identity (PCI) according to a preset rule for all the downlink trunking group call services.
That is, for all downlink trunking group call services, since PCIs of each physical cell corresponding to all downlink trunking group call services are different, in order to make each physical cell unified, when scrambling is performed on each physical cell, a same PCI is determined according to a preset rule, and all physical cells use the same PCI for all downlink trunking group call services, for example, scrambling is performed on all downlink trunking group call services using the smallest PCI, or scrambling may be performed using the largest PCI.
3) And the base station scrambles the downlink service data of all the downlink trunking group calling services respectively according to the determined G-RNTI and the PCI, and transmits the scrambled downlink service data to the terminal through the corresponding physical cells respectively according to the resource allocation results corresponding to all the downlink trunking group calling services.
According to 1) and 2), when scrambling is performed on the same downlink trunking group calling service, the G-RNTI and the PCI used by each physical cell are the same, so that the downlink service data after scrambling is also the same.
The following reasons are specifically described below:
referring to fig. 4, which is a schematic diagram of a processing procedure of a downlink physical channel of a physical layer, it can be known that a scrambling procedure forms a difference for signals of downlink service data between physical cells on an air interface.
According to the 3gpp36.211 protocol, the scrambling procedure is as follows:
for example, for codeword q, its sequence is
The scrambled sequence is
Wherein, c(q)(i) For scrambling sequences, scrambling sequence c(q)(i) Must pass c in each subframeinitCarry out initialization, cinitThe calculation method of (c) is as follows:
as can be known from the formula (1), since the downlink trunking group call service is mapped to a Physical Downlink Shared Channel (PDSCH), in the embodiment of the present invention, for the PDSCH, c is the downlink Shared Channel (PDSCH)initThe method of computing of (3) is improved. For the same codeword q, c of each physical cell in order to achieve the effect of the reception gain of the trunking terminalinitNeeds to be unified and affects each physical cell c in the same subframeinitOf RNTI values and physical cells
I.e., PCI.
Therefore, in the embodiment of the invention, the RNTI value can be only distributed to one G-RNTI for one group in the base station, and each physical cell uses the same G-RNTI when scrambling the same group service code word.
Another influence cinitIs that
Of each cell
Differently, in the embodiment of the present invention, in order to make each physical cell cinitUnifying, using preset rules to determine one identical
For example, provision is made for using the intra-base station maximum for trunking group call servicesIs small and small
To perform scrambling, e.g. by
To indicate the smallest of the cluster base stations
Will be provided with
C for PDSCH substituted in equation 1 aboveinitThe following calculation formula of (2) is obtained for c of PDSCH in the embodiment of the present inventioninitThe calculating method of (2):
the for UE PDSCH indicates the downlink non-trunking Group call service, and the for Group PDSCH indicates the downlink trunking Group call service.
Thus, according to step 110, the same time-frequency resource is allocated for the same Downlink trunking group call service, different Downlink trunking group call services are allocated with different time-frequency resources, according to step 120, for the same Downlink trunking group call service, each Physical cell generates the same scrambled Downlink service data by using the same scrambling method for the Downlink service data of the same Downlink trunking group call service, so that, after the terminal blind detects that a Physical Downlink Control Channel (PDCCH) is the resource allocation of the trunking group call in the Physical cell, and acquires the frequency domain position of the trunking group call, the Downlink service data of the trunking group call service sent by each Physical cell can be received, and the Downlink service data of the trunking group call service sent by each Physical cell can be correctly analyzed, and further through the merging process of the terminal, the same frequency interference of different physical cells can be converted into signal gain of receiving diversity, and the effect of receiving gain of the cluster terminal is achieved.
The above embodiments are further described in detail below using a specific application scenario. Specifically, referring to fig. 5, in the embodiment of the present invention, a specific execution process of the downlink scheduling method is as follows:
for example, in an LTE trunking system, there are two physical cells cell1 and cell2 under a base station, there is one UE under each physical cell, respectively UE1 and UE2, a core network establishes two trunking Group calls Group1 and Group2, and TAs establishing the two trunking Group calls cover the two physical cells cell1 and cell 2.
Firstly, a logic cell is established, and all downlink cluster group calling services are grouped into the logic cell.
For example, the downlink trunking Group call service includes Group1RB1, Group1RB2, Group2RB1, and Group2RB 2.
For the downlink non-cluster group calling service, the processing is not needed, and the downlink non-cluster group calling service is still in the physical cell actually corresponding to the downlink non-cluster group calling service.
For example, the downlink non-trunking group call service in the cell1 includes Ue1RB1 and Ue1RB2, and the downlink non-trunking group call service in the cell2 includes Ue2RB1 and Ue2RB 2.
Then, RB queuing is performed, the downlink trunking group call services in the logical cell are summarized as a group list, and the downlink non-trunking group call services in the cell1 and the cell2 are summarized as a UE list.
In the embodiment of the present invention, the specific principle of RB queuing is not limited, and priority queuing may be performed by using a method in the prior art.
Then, the downlink trunking group calling service in the logical cell is respectively scheduled, and the downlink non-trunking group calling service in the cell1 and the cell2 is respectively scheduled, so as to obtain the corresponding resource allocation result.
And finally, sending downlink service data on the PDSCH according to a scheduling result, namely a resource allocation result.
The method specifically comprises the following steps: before sending, aiming at the same downlink cluster group calling service, the same scrambling mode is adopted during scrambling.
For example, the base station allocates a G-RNTI for each of Group1 and Group2, for example, G-RNTI1 and G-RNTI2, and cell1 and cell2 determine a same PCI, for example, the PCI of cell1 is PCI1, for all downlink cluster Group call services in Group1 and Group 2.
Thus, for example, when downlink traffic data of Group1RB1 is transmitted through cell1 and cell2, the same G-RNTI1 and PCI1 are used when scrambling the downlink traffic data, and thus, the scrambled downlink traffic data transmitted by cell1 and cell2 are also the same.
In this way, the terminal detects the PDCCH channel, and after acquiring the corresponding frequency domain position if detecting the G-RNTI in the PDCCH, that is, detecting that the PDCCH is the resource allocation result of the trunking Group call service, may receive the downlink service data of Group1RB1 sent by the cell1 and the cell2, and also achieves the effect of the terminal receiving gain under the condition of avoiding interference.
Based on the foregoing embodiment, referring to fig. 6, in an embodiment of the present invention, a downlink scheduling apparatus specifically includes:
an allocating unit 20, configured to establish a logical cell for all downlink trunking group call services, and allocate a first frequency domain resource to the logical cell;
a scheduling unit 21, configured to schedule all downlink trunking group call services in the logical cell based on the first frequency domain resource, to obtain resource allocation results corresponding to all downlink trunking group call services;
a sending unit 22, configured to send downlink service data of all downlink trunking group call services to a terminal respectively by using a preset scrambling mode according to respective resource allocation results of all downlink trunking group call services.
Preferably, the scheduling unit 21 is further configured to:
and scheduling the downlink non-cluster group call service based on second frequency domain resources except the first frequency domain resources.
Preferably, the scheduling unit 21 is further configured to:
if the first frequency domain resources remain after all the downlink trunking group calling services in the logic cell are respectively scheduled, continuing to schedule the downlink non-trunking group calling services respectively based on the remaining first frequency domain resources; or the like, or, alternatively,
and if the second frequency domain resources are remained after the downlink non-cluster group call service is scheduled, respectively scheduling the downlink cluster group call service based on the remained second frequency domain resources.
Preferably, when the downlink service data of all the downlink trunking group call services are respectively sent to the terminal by using a preset scrambling mode according to the resource allocation results corresponding to all the downlink trunking group call services, the sending unit 22 is specifically configured to:
respectively determining physical cells corresponding to all downlink cluster group call services according to a mapping relation between a preset TA and the physical cells;
and respectively sending the downlink service data of all the downlink trunking group calling services to a terminal by adopting a preset scrambling mode through respective corresponding physical cells according to respective corresponding resource allocation results of all the downlink trunking group calling services.
Preferably, when the downlink service data of all the downlink trunking group call services are respectively sent to the terminal by using a preset scrambling mode through respective corresponding physical cells according to respective corresponding resource allocation results of all the downlink trunking group call services, the sending unit 22 is specifically configured to:
determining each group to which all downlink trunking group calling services belong according to all downlink trunking group calling services, and respectively determining a G-RNTI (radio network temporary identifier) for each group;
determining a PCI according to a preset rule aiming at all downlink cluster group calling services;
and scrambling the downlink service data of all the downlink trunking group calling services respectively according to the determined G-RNTI and the PCI, and sending the scrambled downlink service data to the terminal through respective corresponding physical cells according to respective resource allocation results of all the downlink trunking group calling services.
In summary, in the embodiment of the present invention, a base station establishes a logical cell for all downlink trunking group call services, and allocates a first frequency domain resource to the logical cell; the base station schedules all downlink cluster group call services in the logic cell respectively based on the first frequency domain resource to obtain resource allocation results corresponding to all the downlink cluster group call services; the base station respectively sends the downlink service data of all the downlink cluster group call services to the terminal by adopting a preset scrambling mode according to the resource allocation results respectively corresponding to all the downlink cluster group call services, so that the downlink cluster group call services can be uniformly scheduled, different downlink cluster group call services have different resource allocation results, and the interference among different downlink cluster group call services is avoided; and the same downlink trunking group calling service can obtain the same resource allocation result, and the same scrambling mode is adopted for the downlink service data of the same downlink trunking group calling service, so that the same scrambled downlink service data can be obtained, and the receiving gain is brought to the trunking terminal under the condition of avoiding interference.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention without departing from the spirit or scope of the embodiments of the invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to encompass such modifications and variations.
Claims (6)
1. A downlink scheduling method, comprising:
a base station establishes a logic cell aiming at all downlink cluster group calling services and allocates a first frequency domain resource for the logic cell;
the base station schedules all downlink cluster group call services in the logic cell respectively based on the first frequency domain resource to obtain resource allocation results corresponding to all the downlink cluster group call services;
the base station respectively determines physical cells corresponding to all downlink trunking group call services according to a mapping relationship between a preset tracking area TA and the physical cells, and the base station respectively sends downlink service data of all downlink trunking group call services to the terminal by adopting a preset scrambling mode through the respective corresponding physical cells according to resource allocation results corresponding to all downlink trunking group call services, wherein the method specifically comprises the following steps: the base station determines each group to which all downlink cluster group call services belong according to all downlink cluster group call services, and determines a group radio network temporary identification G-RNTI for each group; the base station determines a Physical Cell Identity (PCI) according to a preset rule aiming at all the downlink cluster group calling services; and the base station scrambles the downlink service data of all the downlink trunking group calling services respectively according to the determined G-RNTI and the PCI, and transmits the scrambled downlink service data to the terminal through the corresponding physical cells respectively according to the resource allocation results corresponding to all the downlink trunking group calling services.
2. The method of claim 1, further comprising:
and the base station schedules the downlink non-cluster group call service respectively based on the second frequency domain resources except the first frequency domain resources.
3. The method of claim 2, further comprising:
if the base station still has the remaining first frequency domain resources after finishing scheduling all the downlink trunking group call services in the logical cell, the base station continues to schedule the downlink non-trunking group call services respectively based on the remaining first frequency domain resources; or the like, or, alternatively,
and if the base station still has the residual second frequency domain resources after finishing the scheduling of the downlink non-trunking group call service, the base station continues to schedule the downlink trunking group call service respectively based on the residual second frequency domain resources.
4. A downlink scheduling apparatus, comprising:
the distribution unit is used for establishing a logic cell aiming at all downlink cluster group calling services and distributing first frequency domain resources for the logic cell;
a scheduling unit, configured to schedule all downlink trunking group call services in the logical cell based on the first frequency domain resource, respectively, to obtain resource allocation results corresponding to all downlink trunking group call services;
a sending unit, configured to respectively determine physical cells corresponding to all downlink trunking group call services according to a mapping relationship between a preset tracking area TA and the physical cells, and respectively send downlink service data of all downlink trunking group call services to a terminal through the respective corresponding physical cells in a preset scrambling manner according to resource allocation results corresponding to all downlink trunking group call services, where the sending unit is specifically configured to determine, according to all downlink trunking group call services, each group to which all downlink trunking group call services belong, and respectively determine, for each group, a group radio network temporary authentication G-RNTI; determining a Physical Cell Identity (PCI) according to a preset rule aiming at all downlink cluster group calling services; and scrambling the downlink service data of all the downlink trunking group calling services respectively according to the determined G-RNTI and the PCI, and sending the scrambled downlink service data to the terminal through respective corresponding physical cells according to respective resource allocation results of all the downlink trunking group calling services.
5. The apparatus of claim 4, wherein the scheduling unit is further to:
and scheduling the downlink non-cluster group call service based on second frequency domain resources except the first frequency domain resources.
6. The apparatus of claim 5, wherein the scheduling unit is further to:
if the first frequency domain resources remain after all the downlink trunking group calling services in the logic cell are respectively scheduled, continuing to schedule the downlink non-trunking group calling services respectively based on the remaining first frequency domain resources; or the like, or, alternatively,
and if the second frequency domain resources are remained after the downlink non-cluster group call service is scheduled, respectively scheduling the downlink cluster group call service based on the remained second frequency domain resources.
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