CN109152001B - Time-frequency resource allocation method and device - Google Patents
Time-frequency resource allocation method and device Download PDFInfo
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- CN109152001B CN109152001B CN201710453090.3A CN201710453090A CN109152001B CN 109152001 B CN109152001 B CN 109152001B CN 201710453090 A CN201710453090 A CN 201710453090A CN 109152001 B CN109152001 B CN 109152001B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
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Abstract
The invention discloses a time-frequency resource allocation method and a time-frequency resource allocation device, which are used for solving the problem of conflict between semi-static scheduling transmission resources of an LTE (Long term evolution) traditional terminal and eMTC (enhanced multi-carrier) terminal transmission resources. The time-frequency resource allocation method comprises the following steps: when semi-persistent scheduling (SPS) transmission resources are allocated to a traditional terminal in a cell supporting enhanced machine type communication (eMTC) terminal, determining a narrowband transmission resource identifier configured for the eMTC terminal in advance according to the system bandwidth of the cell; and allocating SPS transmission resources for the traditional terminal from the transmission resources except the narrow-band transmission resources corresponding to the narrow-band transmission resource identification.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for allocating time-frequency resources.
Background
Semi-Persistent Scheduling (SPS) refers to that in a Scheduling process of LTE (Long Term Evolution), an LTE cell sends, to an LTE legacy terminal device, an activation Control instruction (DCI) carrying current Scheduling Information of the LTE cell through a Physical Downlink Control Channel (PDCCH) during initial Scheduling, and the LTE legacy terminal device stores the current Scheduling Information of a serving cell after receiving the activation DCI, and transmits or receives service data at the same time-frequency resource position every fixed SPS period. Currently, in an LTE cell, a base station allocates semi-persistent scheduling resources to an LTE legacy terminal in the following manner: when the base station determines that the SPS needs to be activated for the LTE legacy terminal, it selects a Resource with better channel conditions from available time-frequency resources according to the data amount of the user (if a wideband channel Quality indicator (cqi) is configured to be reported, the available Resource is selected according to a PRB (Physical Resource Block) index sequence), and then when the SPS period comes, the LTE legacy terminal uses the same time-frequency Resource to transmit or receive service data according to the Resource allocated when the SPS is activated.
The LTE R13 protocol introduces an Enhanced Machine Type Communication (eMTC) terminal, and uplink and Downlink Control Channel (MPDCCH) information and data transmission (PDSCH) of the eMTC terminal can be repeatedly transmitted, and both the MPDCCH and the PDSCH thereof are transmitted on conventional PDSCH Channel resources, where the time domain and frequency domain positions of the MPDCCH of the tc terminal are limited. When allocating resources in uplink/downlink, the eMTC terminal introduces a Narrow Band (NB), and uplink/downlink resources used by the eMTC terminal in a single subframe are limited to one narrow band, and one narrow band contains 6 PRBs (physical resource blocks). At present, a selection strategy of a base station for a narrow band where an MPDCCH of an eMTC terminal is located is mainly to evenly distribute the eMTC terminal on all narrow bands corresponding to an LTE cell bandwidth as much as possible, and a selection strategy for a PRB index included in the MPDCCH of the eMTC terminal is to be centrally and continuously distributed on the PRB index in the narrow band.
At present, if the SPS of the conventional terminal is started in the LTE cell supporting the eMTC terminal, when the SPS of the LTE conventional terminal is activated, since the time of deactivation cannot be predicted, the eMTC terminal can only consider that the PDSCH resources occupied by the conventional SPS are occupied according to the cycle of the PDSCH resources for indefinite time when allocating resources, which will seriously affect the PDSCH resource allocation of the eMTC terminal. If the resource occupied by the SPS of the LTE traditional terminal uses the resource used by the MPDCCH of the eMTC terminal, and if the time used by the eMTC terminal in the process from the beginning to the end of the repeated transmission of the MPDCCH which can be correctly demodulated is less than the SPS period length, the eMTC terminal cannot accept scheduling at the moment, but if the time domain of the MPDCCH of the eMTC terminal always conflicts with the SPS transmission moment, the eMTC terminal has the opportunity to accept scheduling only after the SPS is deactivated; if the time used by the eMTC terminal in the process from the beginning to the end of the MPDCCH repeated transmission which can be correctly demodulated is longer than the SPS period length, the eMTC terminal has the opportunity to accept scheduling only after the SPS is deactivated, so that the PDSCH resource allocation of the eMTC terminal is limited and the scheduling opportunity of the eMTC terminal is limited, and especially when the time domain and the frequency domain occupied by the SPS collide with the MPDCCH transmission of the eMTC terminal, the eMTC terminal can not be scheduled for a long time.
Disclosure of Invention
The invention discloses a time-frequency resource allocation method and a time-frequency resource allocation device, which are used for solving the problem of conflict between semi-static scheduling transmission resources of an LTE (Long term evolution) traditional terminal and eMTC (enhanced multi-carrier) terminal transmission resources.
In a first aspect, an embodiment of the present invention provides a time-frequency resource allocation method, including:
when SPS transmission resources are distributed to a traditional terminal in a cell of an eMTC terminal, determining a narrowband transmission resource identifier which is configured for the eMTC terminal in advance according to the system bandwidth of the cell;
and allocating SPS transmission resources for the traditional terminal from the transmission resources except the narrow-band transmission resources corresponding to the narrow-band transmission resource identification.
In one possible design, if it is determined that there are insufficient SPS transmission resources allocated to the legacy terminal based on the amount of data to be transmitted by the legacy terminal, then
The method further comprises the following steps:
selecting and marking transmission resources allocated to the legacy terminal from the narrowband transmission resources; and
and when the transmission resources are allocated to the eMTC terminal, selecting the unmarked transmission resources from the narrow-band transmission resources to allocate to the eMTC terminal.
In one possible design, the narrowband transmission resource consists of sets of transmission resources that are contiguous in frequency domain position;
selecting and marking transmission resources allocated to the conventional terminal from the narrowband transmission resources, specifically comprising:
sequentially determining transmission resources with continuous frequency domain positions as transmission resources allocated to the eMTC terminal from the boundary position of any end of any group of transmission resources contained in the narrowband transmission resources; and are
Marking a transmission resource not allocated to the eMTC terminal.
In one possible design, if it is determined from the cell bandwidth that there is an idle transmission resource not configured to the eMTC terminal among all transmission resources contained by the cell
Sequentially determining, from any end boundary position of any group of transmission resources included in the narrowband transmission resource, transmission resources with consecutive frequency domain positions as transmission resources allocated to the eMTC terminal, specifically including:
and sequentially determining transmission resources with continuous frequency domain positions as the transmission resources allocated to the eMTC terminal from the boundary position at one end far away from the idle transmission resources in any group of transmission resources, which are adjacent to the idle transmission resources, contained in the narrow-band transmission resources.
In one possible design, further comprising:
if the fact that SPS transmission resources are distributed to the traditional terminal is still insufficient is determined according to the data volume to be transmitted of the traditional terminal, configuring a downlink small-bandwidth low-complexity BL or coverage enhancement CE effective subframe for the eMTC terminal; and
and allocating SPS transmission resources for the traditional terminal on a downlink BL or CE non-effective subframe.
In a second aspect, an embodiment of the present invention provides a time-frequency resource allocation apparatus, including:
the mobile terminal comprises a determining unit, a judging unit and a processing unit, wherein the determining unit is used for determining a narrowband transmission resource identifier configured for an eMTC terminal in advance according to the system bandwidth of a cell when SPS transmission resources are allocated to a traditional terminal in the cell of the eMTC terminal;
a first allocating unit, configured to allocate SPS transmission resources to the legacy terminal from transmission resources other than the narrowband transmission resource corresponding to the narrowband transmission resource identifier.
In one possible design, further comprising:
a marking unit, configured to select a transmission resource allocated to the legacy terminal from the narrowband transmission resources and mark the transmission resource if it is determined that SPS transmission resources allocated to the legacy terminal are insufficient according to the amount of data to be transmitted by the legacy terminal;
and a second allocating unit, configured to select, when allocating transmission resources for the eMTC terminal, a transmission resource that is not marked by the marking unit from the narrowband transmission resources to allocate to the eMTC terminal.
In one possible design, the narrowband transmission resource consists of sets of transmission resources that are contiguous in frequency domain position;
the marking unit is specifically configured to sequentially determine, from any end boundary position of any group of transmission resources included in the narrowband transmission resource, transmission resources with consecutive frequency domain positions as transmission resources allocated to the eMTC terminal; and marking transmission resources not allocated to the eMTC terminal.
In a possible design, the marking unit is specifically configured to, if it is determined that there is an idle transmission resource that is not configured for the eMTC terminal among all transmission resources included in the cell according to the cell bandwidth, sequentially determine, from a boundary position that is far from one end of the idle transmission resource in any group of transmission resources, which is adjacent to the idle transmission resource, of any group of transmission resources included in the narrowband transmission resources, as the transmission resource allocated to the eMTC terminal, transmission resources whose frequency-domain positions are consecutive.
In one possible design, further comprising:
a configuration unit, configured to configure a downlink small-bandwidth low-complexity BL or a coverage enhancement CE valid subframe for the eMTC terminal if it is determined that SPS transmission resources allocated to the legacy terminal are still insufficient according to the amount of data to be transmitted by the legacy terminal;
a third allocating unit, configured to allocate SPS transmission resources to the legacy terminal on a downlink BL or CE non-valid subframe.
The beneficial effects of the invention include:
in the time-frequency resource allocation method and the time-frequency resource allocation device, when the base station allocates the SPS transmission resources for the traditional terminal in the cell supporting the eMTC terminal, the narrow-band transmission resource identifier which is configured for the eMTC terminal in advance is determined according to the system bandwidth of the cell, and the SPS transmission resources are allocated for the traditional terminal from the transmission resources except the narrow-band transmission resources corresponding to the narrow-band transmission resource identifier, so that the problem that the semi-static scheduling transmission resources of the traditional terminal conflict with the transmission resources of the eMTC terminal is solved, and the transmission efficiency of data is improved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic diagram of narrowband allocation under different system bandwidths of an LTE cell;
fig. 2 is a schematic diagram of an implementation flow of a time-frequency resource allocation method according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an implementation flow of a time-frequency resource allocation method according to a second embodiment of the present invention;
fig. 4 is a schematic diagram of transmission resource allocation of an eMTC terminal when a cell system bandwidth is 5MHz in the time-frequency resource allocation method according to the second embodiment of the present invention;
fig. 5 is a schematic structural diagram of a time-frequency resource allocation apparatus according to a third embodiment of the present invention;
fig. 6 is a schematic structural diagram of a base station device according to a fourth embodiment of the present invention.
Detailed Description
The invention provides a time-frequency resource allocation method and a time-frequency resource allocation device, which aim to solve the problem of conflict between semi-persistent scheduling transmission resources of a traditional terminal and eMTC terminal transmission resources.
The implementation principle of the time-frequency resource allocation method provided by the embodiment of the invention is as follows: when a base station allocates SPS transmission resources for a traditional terminal in a cell supporting an eMTC terminal, a narrow-band transmission resource identifier configured for the eMTC terminal in advance is determined according to the system bandwidth of the cell, and SPS transmission resources are allocated for the traditional terminal from transmission resources except the narrow-band transmission resources corresponding to the narrow-band transmission resource identifier, so that the problem that semi-static scheduling transmission resources of the traditional terminal conflict with transmission resources of the eMTC terminal is avoided, and the data transmission efficiency is improved.
The method provided by the embodiment of the invention can be applied to a cell supporting an eMTC terminal, for example, the method provided by the embodiment of the invention can be applied to an LTE cell. For convenience of description, the following describes an implementation process of the present invention by taking an LTE cell as an example.
In an LTE cell, when a base station allocates transmission resources for an eMTC terminal, the base station divides different number of narrow bands under different system bandwidths, and each narrow band includes 6 PRBs. A base station allocates 2, 4, or 6 frequency-domain continuous PRB resources in a narrowband as transmission resources of an eMTC terminal, as shown in fig. 1, which is a narrowband allocation diagram under different system bandwidths of an LTE cell, and includes a number of a narrowband corresponding to each system bandwidth and a PRB index included in each narrowband, where nb (narrow band) represents a narrowband.
In some system bandwidths, in addition to the PRBs in the narrowband that can be transmission resources of the eMTC terminal, the PRBs in the narrowband that are not allocated to the eMTC terminal are also included, and as shown in fig. 1, the PRB indexes that are not allocated to the eMTC terminal, that is, cannot be used by the eMTC terminal, include: when the system bandwidth of the cell is 3MHz, PRBs not allocated to the eMTC terminal are a PRB0, a PRB7 and a PRB 14; when the system bandwidth of the cell is 5MHz, PRBs 12 exist in the PRBs not allocated to the eMTC terminal; when the system bandwidth of the cell is 10MHz, PRBs 0 and 49 exist in the PRBs not allocated to the eMTC terminal; when the system bandwidth of the cell is 15MHz, PRBs not allocated to the eMTC terminal are a PRB0, a PRB37 and a PRB 74; when the cell system bandwidth is 20MHz, PRBs not allocated to the eMTC terminal include PRB0, PRB1, PRB98, and PRB 99.
If semi-persistent scheduling of a legacy terminal is started in an LTE cell supporting an eMTC terminal, in order to avoid that the semi-persistent scheduling of the legacy terminal conflicts with transmission resources allocated to the eMTC terminal by a base station to influence resource scheduling of the eMTC terminal when the semi-persistent scheduling of the legacy terminal is activated, in the embodiment of the invention, under each system bandwidth, the semi-persistent scheduling transmission resources are allocated to the legacy terminal from transmission resources other than narrow-band transmission resources allocated to the eMTC terminal, if the semi-persistent scheduling transmission resources allocated to the legacy terminal are determined to be still insufficient according to the data volume to be transmitted by the legacy terminal, the base station can select part of the transmission resources from the narrow-band transmission resources allocated to the eMTC terminal to allocate to the legacy terminal, in this case, in order to avoid the transmission resources occupied by the eMTC terminal from conflicting with SPS transmission resources allocated to the legacy terminal, the SPS transmission resources allocated to the legacy terminal by the base station from the narrow-band transmission resources need, further, if the SPS transmission resource allocated to the transmission terminal is still insufficient, in this embodiment of the present invention, a downlink BL or CE (small Bandwidth Low complexity or Coverage Enhancement) valid subframe may also be configured for the eMTC terminal, and a semi-persistent scheduling resource may be allocated to the legacy terminal on the downlink BL or CE non-valid subframe.
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings of the specification, it being understood that the preferred embodiments described herein are merely for illustrating and explaining the present invention, and are not intended to limit the present invention, and that the embodiments and features of the embodiments in the present invention may be combined with each other without conflict.
Example one
As shown in fig. 2, which is a schematic diagram of an implementation flow of the time-frequency resource allocation method provided in the first embodiment of the present invention, the method may include the following steps:
s11, when SPS transmission resources are distributed for a traditional terminal in a cell supporting an eMTC terminal, determining a narrowband transmission resource identifier configured for the eMTC terminal in advance according to the system bandwidth of the cell.
In specific implementation, when the base station allocates SPS transmission resources to a legacy terminal in an LTE cell of the eMTC terminal, the base station determines a narrowband transmission resource identifier configured for the eMTC terminal in advance according to a system bandwidth of the cell. For example, when the system bandwidth of a cell is 3MHz, the narrowband previously allocated by the base station for the eMTC terminal is narrowband 0 and narrowband 1, the transmission resources in the narrowband 0 are PRBs 1-6, and the transmission resources in the narrowband 1 are PRBs 8-13.
S12, allocating SPS transmission resources for the legacy terminal from transmission resources other than the narrowband transmission resource corresponding to the narrowband transmission resource identifier.
In specific implementation, the base station allocates SPS transmission resources to the legacy terminal from transmission resources other than the narrowband transmission resources corresponding to the narrowband transmission resource identifier, where the narrowband transmission resources are composed of a plurality of sets of transmission resources with consecutive frequency domain positions. When the system bandwidth of the cell is 3MHz, and when the system bandwidth of the cell is 3MHz, the transmission resources other than the narrowband transmission resource corresponding to the narrowband transmission resource identifier are PRB0, PRB7, and PRB 14; when the system bandwidth of the cell is 5MHz, the transmission resources except the narrowband transmission resource corresponding to the narrowband transmission resource identifier have PRB 12; when the system bandwidth of the cell is 10MHz, the transmission resources except the narrowband transmission resource corresponding to the narrowband transmission resource identifier are PRB0 and PRB 49; when the system bandwidth of the cell is 15MHz, the transmission resources except the narrowband transmission resource corresponding to the narrowband transmission resource identifier are PRB0, PRB37 and PRB 74; when the cell system bandwidth is 20MHz, the transmission resources other than the narrowband transmission resource corresponding to the narrowband transmission resource identifier include PRB0, PRB1, PRB98, and PRB 99. Under different system bandwidths, the base station may select SPS transmission resources allocated for the legacy terminal from the PRB resources under the respective system bandwidths.
In the time-frequency resource allocation method provided by the embodiment of the invention, when a base station allocates SPS transmission resources to a traditional terminal in a cell supporting an eMTC terminal, a narrowband transmission resource identifier pre-configured for the eMTC terminal is determined according to a system bandwidth of the cell, SPS transmission resources are allocated to the traditional terminal from transmission resources other than the narrowband transmission resources corresponding to the narrowband transmission resource identifier, and under the condition that the amount of data to be transmitted by the traditional terminal in the cell is small, the above procedure can meet the requirement for configuring the SPS transmission resources for the traditional terminal, so that the problem of conflict between semi-persistent scheduling transmission resources of the traditional terminal and the transmission resources of the eMTC terminal is avoided, and the transmission efficiency of data is improved.
Example two
In the second embodiment, if the base station determines that the transmission resources allocated to the legacy terminal are insufficient according to the amount of data to be transmitted by the legacy terminal, a part of the transmission resources may be selected from the narrowband transmission resources configured for the eMTC terminal and allocated to the legacy terminal.
As shown in fig. 3, which is a schematic diagram of an implementation flow of the time-frequency resource allocation method provided in the second embodiment of the present invention, the implementation flow may include the following steps:
s21, when SPS transmission resources are allocated to a legacy terminal in a cell of the eMTC terminal, determining a narrowband transmission resource identifier configured in advance for the eMTC terminal according to a system bandwidth of the cell.
S22, allocating SPS transmission resources for the legacy terminal from transmission resources other than the narrowband transmission resources corresponding to the narrowband transmission resource identifier.
And S23, if the traditional terminal is determined to be allocated with SPS transmission resources insufficiently according to the data volume to be transmitted by the traditional terminal, selecting the transmission resources allocated to the traditional terminal from the narrow-band transmission resources and marking.
In specific implementation, if the base station determines that SPS transmission resources allocated to the legacy terminal are insufficient according to the amount of data to be transmitted by the legacy terminal, the base station selects and marks transmission resources allocated to the legacy terminal from the narrowband transmission resources.
In specific implementation, the narrowband transmission resource is composed of a plurality of groups of transmission resources with continuous frequency domain positions. Based on this, the base station may sequentially determine, starting from any end boundary position of any set of transmission resources included in the narrowband transmission resources, transmission resources whose frequency domain positions are consecutive as transmission resources allocated to the eMTC terminal, and mark transmission resources not allocated to the eMTC terminal. For example, when the cell system bandwidth is 5MHz, the base station may select transmission resources PRB 0-11 and P13-18 in narrowband 0, narrowband 1 and narrowband 3 to allocate to eMTC terminals, and mark transmission resources PRB 19-24 in narrowband 3.
S24, when allocating transmission resources to the eMTC terminal, selects an unmarked transmission resource from the narrowband transmission resources and allocates the selected transmission resource to the eMTC terminal.
In specific implementation, when the base station allocates transmission resources for the eMTC terminal, the base station selects unmarked transmission resources from the narrowband transmission resources to allocate to the eMTC terminal, and configures the marked unmarked transmission resources to be SPS transmission resources of the legacy terminal. The transmission resources which are not marked in the step S23, namely P RB 0-11 and P13-18, allocate the P RB 0-11 and P13-18 to the eMTC terminal, and configure the PRBs 19-24 as the SPS transmission resources of the traditional terminal.
Further, if it is determined that there is an idle transmission resource that is not configured for the eMTC terminal in all transmission resources included in the cell according to the cell bandwidth, it is sequentially determined that transmission resources whose frequency domain positions are continuous are transmission resources allocated to the eMTC terminal, starting from a boundary position at one end, which is far from the idle transmission resource, of any group of transmission resources, which are included in the narrowband transmission resources and are adjacent to the idle transmission resource.
Specifically, as shown in fig. 4, it is a schematic diagram of transmission resource configuration of an eMTC terminal when a cell system bandwidth is 5MHz in a time-frequency resource allocation method provided by the second embodiment of the present invention, for example, when the cell system bandwidth is 5MHz, a transmission resource PRB12 that is not configured for the eMTC terminal exists, if the transmission resource allocated to the eMTC terminal is designated as narrowband 1 and 2 PRBs are configured, the transmission resource is configured as a PRB6 and PRB7, and the remaining PRBs 8-11 in the narrowband 1 may be configured as transmission resources of an SPS of a conventional terminal together with the PRB 12; if 4 PRBs are configured, the PRBs 6-9 are configured, and the remaining PRBs 10-11 in the narrowband 1 can be configured as the transmission resources of the conventional terminal SPS together with the PRB 12. If the transmission resource allocated to the eMTC terminal is designated as narrow band 2, and 2 PRBs are configured, the PRBs are configured to be 17-18, and the remaining PRBs 13-16 in the narrow band 2 can be configured as the transmission resource of the SPS of the traditional terminal together with the PRB 12; if 4 PRBs are configured, the PRBs 15-18 are configured, and the remaining PRBs 13-14 in the narrowband 2 can be configured as the transmission resources of the conventional terminal SPS together with the PRB 12.
Further, if the base station determines that the conventional terminal is still insufficient in SPS transmission resource allocation according to the amount of data to be transmitted by the conventional terminal, the base station configures a downlink BL or CE valid subframe for the eMTC terminal, and allocates SPS transmission resource to the conventional terminal on a downlink BL or CE invalid subframe.
Specifically, when the downlink BL or CE valid subframe is configured to be 10 bits, the number of the legacy terminals currently activated with SPS in the cell is evaluated, 1 or more downlink BL or CE invalid subframes are configured within 10ms to serve as SPS time domain resources of the legacy terminals, and when SPS transmission resources are allocated to the legacy terminals, the legacy terminals are equally dispersed on the downlink BL or CE invalid subframes as much as possible according to the SPS period and the number of the downlink BL or CE invalid subframes configured within 10ms, so as to reduce the throughput of a single subframe of the base station. When the downlink BL or CE valid subframe is configured to be 40 bits, the number of traditional terminals which are currently activated with SPS in the cell is evaluated, a possibly configured SPS minimum period is considered, downlink BL or CE invalid subframes within 40ms are configured to serve as SPS time domain resources of the traditional terminals, and when SPS transmission resources are distributed for the traditional terminals, the traditional terminals are evenly dispersed on the downlink BL or CE invalid subframes as much as possible according to the SPS period and the number of the downlink BL or CE invalid subframes configured within 40ms, so that the processing amount of a single subframe of a base station is reduced.
The following embodiments of the present invention are also applicable to the uplink, and are not limited herein. The implementation of steps S21 and S22 refers to the implementation of steps S11 and S12 in the first embodiment, which are not repeated herein.
In the time-frequency resource allocation method provided in the second embodiment of the present invention, when a base station allocates SPS transmission resources to a legacy terminal in a cell supporting an eMTC terminal, a narrowband transmission resource identifier pre-configured for the eMTC terminal is determined according to a system bandwidth of the cell, and SPS transmission resources are allocated to the legacy terminal from transmission resources other than the narrowband transmission resources corresponding to the narrowband transmission resource identifier; if the fact that SPS transmission resources are distributed to the traditional terminal is insufficient is determined according to the data volume to be transmitted of the traditional terminal, the transmission resources distributed to the traditional terminal are selected from the narrow-band transmission resources and marked, and when the transmission resources are distributed to the eMTC terminal, the transmission resources which are not marked are selected from the narrow-band transmission resources and distributed to the eMTC terminal; if the transmission resources which are not configured to the eMTC terminal exist in all the transmission resources contained in the cell according to the cell bandwidth, sequentially determining the transmission resources with continuous frequency domain positions as the transmission resources which are allocated to the eMTC terminal from the boundary position which is not adjacent to one end of the transmission resources which are not configured to the eMTC terminal in the narrow-band resources; and if the fact that SPS transmission resources are distributed to the traditional terminal is still insufficient is determined according to the data volume to be transmitted of the traditional terminal, configuring a downlink BL or CE effective subframe for the eMTC terminal, and distributing the SPS transmission resources to the traditional terminal on the downlink BL or CE ineffective subframe. In the above process, the problem of conflict between the semi-persistent scheduling transmission resource of the traditional terminal and the transmission resource of the eMTC terminal is avoided, and the data transmission efficiency is improved.
EXAMPLE III
Based on the same inventive concept, a time-frequency resource allocation apparatus is further provided in the third embodiment of the present invention, and because the principle of the apparatus for solving the problem is similar to that of the time-frequency resource allocation method, the implementation of the apparatus can refer to the implementation of the method, and repeated details are not repeated.
As shown in fig. 5, which is a schematic structural diagram of a time-frequency resource allocation apparatus provided in the third embodiment of the present invention, the time-frequency resource allocation apparatus may include:
a determining unit 31, configured to determine, when SPS transmission resources are allocated to a legacy terminal in a cell of an eMTC terminal, a narrowband transmission resource identifier configured in advance for the eMTC terminal according to a system bandwidth of the cell;
a first allocating unit 32, configured to allocate SPS transmission resources to the legacy terminal from transmission resources other than the narrowband transmission resource corresponding to the narrowband transmission resource identifier.
Optionally, the time-frequency resource allocation apparatus provided in the embodiment of the present invention may further include:
a marking unit 33, configured to select a transmission resource allocated to the legacy terminal from the narrowband transmission resources and mark the transmission resource if it is determined that SPS transmission resources allocated to the legacy terminal are insufficient according to the amount of data to be transmitted by the legacy terminal;
a second allocating unit 34, configured to select, when allocating transmission resources for the eMTC terminal, a transmission resource that is not marked by the marking unit 33 from the narrowband transmission resources to allocate to the eMTC terminal.
Preferably, the narrowband transmission resource is composed of a plurality of groups of transmission resources with continuous frequency domain positions;
the marking unit 33 is specifically configured to sequentially determine, from any end boundary position of any group of transmission resources included in the narrowband transmission resource, transmission resources with consecutive frequency domain positions as transmission resources allocated to the eMTC terminal; and marking transmission resources not allocated to the eMTC terminal.
Preferably, the marking unit 33 is specifically configured to, if it is determined according to the cell bandwidth that there is an idle transmission resource that is not configured to the eMTC terminal in all transmission resources included in the cell, sequentially determine, from a boundary position that is far from one end of the idle transmission resource in any group of transmission resources, which is adjacent to the idle transmission resource, of any group of transmission resources included in the narrowband transmission resource, the transmission resources whose frequency domain positions are consecutive as the transmission resources allocated to the eMTC terminal.
Optionally, the time-frequency resource allocation apparatus provided in the embodiment of the present invention may further include:
a configuration unit 35, configured to configure a downlink BL or CE valid subframe for the eMTC terminal if it is determined that SPS transmission resources allocated to the legacy terminal are still insufficient according to the amount of data to be transmitted by the legacy terminal;
a third allocating unit 36, configured to allocate SPS transmission resources to the legacy terminal on a downlink BL or CE non-valid subframe.
Example four
Based on the same inventive concept of the method embodiment corresponding to fig. 2, a fourth embodiment of the present invention further provides a base station device. The structure of the base station device is shown in fig. 6, and includes a processor 401, a memory 402, and a transceiver 403, where:
a processor 401 for reading the program in the memory 402, and executing the following processes:
receives and transmits information via the transceiver 403 and performs the method described in the embodiment corresponding to fig. 4 above.
A transceiver 403 for receiving and transmitting information under the control of the processor 401.
A memory 402 for storing software programs.
In fig. 6, a bus architecture (represented by bus 400), bus 400 may include any number of interconnected buses and bridges, bus 400 linking together various circuits including one or more processors, represented by processor 401, and memory, represented by memory 402. The bus 400 may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface 404 provides an interface between the bus 400 and the transceiver 403. The transceiver 403 may be one element or may be multiple elements, such as multiple receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium.
Alternatively, the processor 401 may be a CPU, ASIC, FPGA or CPLD, etc.
For convenience of description, the above parts are separately described as modules (or units) according to functional division. Of course, the functionality of the various modules (or units) may be implemented in the same or in multiple pieces of software or hardware in practicing the invention.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, 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 (devices), 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 changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations 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 include such modifications and variations.
Claims (10)
1. A time-frequency resource allocation method is characterized by comprising the following steps:
when semi-persistent scheduling (SPS) transmission resources are allocated to a traditional terminal in a cell supporting enhanced machine type communication (eMTC) terminal, determining a narrowband transmission resource identifier configured for the eMTC terminal in advance according to the system bandwidth of the cell;
and allocating SPS transmission resources for the traditional terminal from the transmission resources except the narrow-band transmission resources corresponding to the narrow-band transmission resource identification.
2. The method of claim 1, wherein if the SPS transmission resources allocated for the legacy terminal are determined to be insufficient based on the amount of data to be transmitted by the legacy terminal, then
The method further comprises the following steps:
selecting and marking transmission resources allocated to the legacy terminal from the narrowband transmission resources; and
and when the transmission resources are allocated to the eMTC terminal, selecting the unmarked transmission resources from the narrow-band transmission resources to allocate to the eMTC terminal.
3. The method of claim 2, wherein the narrowband transmission resources consist of sets of transmission resources that are contiguous in frequency domain position;
selecting and marking transmission resources allocated to the conventional terminal from the narrowband transmission resources, specifically comprising:
sequentially determining transmission resources with continuous frequency domain positions as transmission resources allocated to the eMTC terminal from the boundary position of any end of any group of transmission resources contained in the narrowband transmission resources; and are
Marking a transmission resource not allocated to the eMTC terminal.
4. The method of claim 3, wherein the eMTC terminal is configured to transmit the data if there is an idle transmission resource that is not configured for the eMTC terminal among all transmission resources contained by a cell determined from the cell bandwidth
Sequentially determining, from any end boundary position of any group of transmission resources included in the narrowband transmission resource, transmission resources with consecutive frequency domain positions as transmission resources allocated to the eMTC terminal, specifically including:
and sequentially determining transmission resources with continuous frequency domain positions as the transmission resources allocated to the eMTC terminal from the boundary position at one end far away from the idle transmission resources in any group of transmission resources, which are adjacent to the idle transmission resources, contained in the narrow-band transmission resources.
5. The method of claim 2, 3 or 4, further comprising:
if the fact that SPS transmission resources are distributed to the traditional terminal is still insufficient is determined according to the data volume to be transmitted of the traditional terminal, configuring a downlink small-bandwidth low-complexity BL or coverage enhancement CE effective subframe for the eMTC terminal; and
and allocating SPS transmission resources for the traditional terminal on a downlink BL or CE non-effective subframe.
6. A time-frequency resource allocation apparatus, comprising:
the system comprises a determining unit, a scheduling unit and a scheduling unit, wherein the determining unit is used for determining a narrowband transmission resource identifier configured for an enhanced machine type communication (eMTC) terminal in advance according to a system bandwidth of a cell when semi-persistent scheduling (SPS) transmission resources are allocated to a traditional terminal in the cell supporting the eMTC terminal;
a first allocating unit, configured to allocate SPS transmission resources to the legacy terminal from transmission resources other than the narrowband transmission resource corresponding to the narrowband transmission resource identifier.
7. The apparatus of claim 6, further comprising:
a marking unit, configured to select a transmission resource allocated to the legacy terminal from the narrowband transmission resources and mark the transmission resource if it is determined that SPS transmission resources allocated to the legacy terminal are insufficient according to the amount of data to be transmitted by the legacy terminal;
and a second allocating unit, configured to select, when allocating transmission resources for the eMTC terminal, a transmission resource that is not marked by the marking unit from the narrowband transmission resources to allocate to the eMTC terminal.
8. The apparatus of claim 7, wherein the narrowband transmission resources consist of sets of transmission resources that are contiguous in frequency domain position;
the marking unit is specifically configured to sequentially determine, from any end boundary position of any group of transmission resources included in the narrowband transmission resource, transmission resources with consecutive frequency domain positions as transmission resources allocated to the eMTC terminal; and marking transmission resources not allocated to the eMTC terminal.
9. The apparatus of claim 8,
the marking unit is specifically configured to, if it is determined according to the cell bandwidth that there is an idle transmission resource that is not configured to the eMTC terminal in all transmission resources included in the cell, sequentially determine, from a boundary position of one end, which is far from an idle transmission resource, of any group of transmission resources, which is adjacent to the idle transmission resource, of any group of transmission resources included in the narrowband transmission resource, as the transmission resource allocated to the eMTC terminal, transmission resources whose frequency-domain positions are continuous.
10. The apparatus of claim 7, 8 or 9, further comprising:
a configuration unit, configured to configure a downlink small-bandwidth low-complexity BL or a coverage enhancement CE valid subframe for the eMTC terminal if it is determined that SPS transmission resources allocated to the legacy terminal are still insufficient according to the amount of data to be transmitted by the legacy terminal;
a third allocating unit, configured to allocate SPS transmission resources to the legacy terminal on a downlink BL or CE non-valid subframe.
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