CN108633012B - Time slot aggregation method, device and base station - Google Patents
Time slot aggregation method, device and base station Download PDFInfo
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- CN108633012B CN108633012B CN201710174229.0A CN201710174229A CN108633012B CN 108633012 B CN108633012 B CN 108633012B CN 201710174229 A CN201710174229 A CN 201710174229A CN 108633012 B CN108633012 B CN 108633012B
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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
- H04W72/0446—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
- H04W72/12—Wireless traffic scheduling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/52—Allocation or scheduling criteria for wireless resources based on load
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/535—Allocation or scheduling criteria for wireless resources based on resource usage policies
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Abstract
The invention provides a time slot aggregation method, a time slot aggregation device and a base station. The method comprises the following steps: designing DMRS patterns of a plurality of time slots based on a double-time-slot polymerization DMRS pattern; receiving scheduling signaling, wherein the scheduling signaling contains indication information of DMRS patterns of the plurality of time slots; scheduling the plurality of time slots according to the scheduling signaling. The invention can reduce the cost of the DMRS during time slot polymerization.
Description
Technical Field
The present invention relates to the field of digital communication technologies, and in particular, to a time slot aggregation method, apparatus, and base station.
Background
In a digital communication system, Demodulation of data relies on estimation of a channel by a DMRS (Demodulation reference signal). The resource occupied by the DMRS in one physical resource block is configurable and is usually represented by a DMRS pattern. In an OFDM (Orthogonal Frequency Division Multiplexing) system based on cyclic prefixes, a DMRS pattern generally includes a set of pre-DMRSs and a series of additional DMRSs, and a base station configures a combination of the pre-DMRSs and the additional DMRSs for downlink and uplink according to a current channel condition and a number of transmission ports. Fig. 1 shows a method for configuring a DMRS pattern, where in one physical resource block shown in fig. 1, 1 slot has 14 symbols, where a control region occupies 2 symbols, and different shaded portions represent DMRSs configured for different ports by a base station.
When the base station actually calls the resources, it is often necessary to schedule the resources of more than 1 time slot at a time, and we refer to this application scenario as time slot aggregation.
In time slot aggregation, the existing designs all assume that the subsequent time slot and the first time slot in time slot aggregation use the same DMRS pattern. Assuming that the DMRS pattern of the first slot is as shown in fig. 1, when two slots are aggregated, their aggregated DMRS pattern is as shown in fig. 2. Obviously, in the prior art, when time slot aggregation is realized, DMRS needs to occupy a large amount of resources, and DMRS overhead is large.
Disclosure of Invention
The time slot aggregation method, the time slot aggregation device and the base station can reduce the overhead of the DMRS.
In a first aspect, the present invention provides a timeslot aggregation method, including:
designing DMRS patterns of a plurality of time slots based on a double-time-slot polymerization DMRS pattern;
receiving scheduling signaling, wherein the scheduling signaling contains indication information of DMRS patterns of the plurality of time slots;
scheduling the plurality of time slots according to the scheduling signaling.
Optionally, the designing DMRS patterns for a plurality of slots based on the dual-slot aggregated DMRS pattern includes:
configuring a first slot and a second slot of the plurality of slots into a dual-slot aggregated DMRS pattern;
and beginning from the third time slot in the plurality of time slots, extending the subsequent time slot by taking the double-time-slot polymerization DMRS pattern as a period.
Optionally, the configuring the first slot and the second slot of the plurality of slots into a dual-slot aggregated DMRS pattern comprises:
configuring a preamble DMRS in the first time slot, wherein the symbol number of the preamble DMRS is 1 or 2.
Optionally, the configuring the first slot and the second slot of the plurality of slots into a dual-slot aggregated DMRS pattern further comprises:
configuring a post DMRS in the second slot after configuring a pre-DMRS in the first slot, wherein the number of symbols of the post DMRS is the same as that of the pre-DMRS, and the frequency domain density of the post DMRS is equal to or less than that of the pre-DMRS.
Optionally, the number of symbols in each of the plurality of slots is 7 or 14.
In a second aspect, the present invention provides a timeslot aggregation apparatus, including:
a design module for designing DMRS patterns of a plurality of slots based on a dual slot aggregation DMRS pattern;
a receiving module, configured to receive a scheduling signaling, where the scheduling signaling includes indication information of DMRS patterns of the multiple time slots;
and the scheduling module is used for scheduling the plurality of time slots according to the scheduling signaling.
Optionally, the design module comprises:
a configuration unit, configured to configure a first slot and a second slot of the plurality of slots into a dual-slot aggregated DMRS pattern;
and a continuation unit, configured to start from a third slot in the multiple slots, and continue a subsequent slot with the dual-slot aggregated DMRS pattern as a period.
Optionally, the configuration unit includes:
a first configuration subunit, configured to configure a preamble DMRS in the first time slot, where a symbol number of the preamble DMRS is 1 or 2.
Optionally, the configuration unit further includes:
and a second configuration subunit, configured to configure, in the second slot, a post-DMRS, where the number of symbols of the post-DMRS is the same as the number of symbols of the pre-DMRS, and a frequency-domain density of the post-DMRS is equal to or less than a frequency-domain density of the pre-DMRS.
Optionally, the number of symbols in each of the plurality of slots is 7 or 14.
In a third aspect, the present invention provides a base station, where the base station includes the above timeslot aggregation apparatus.
The time slot polymerization method, the device and the base station provided by the invention are used for designing the DMRS patterns of a plurality of time slots based on the DMRS pattern polymerization of the double time slots, receiving the scheduling signaling containing the indication information of the DMRS patterns of the plurality of time slots and scheduling the plurality of time slots according to the scheduling signaling.
Drawings
Fig. 1 is a DMRS pattern for one slot;
fig. 2 is a DMRS pattern when two slots using the DMRS pattern shown in fig. 1 are aggregated in the slot;
fig. 3 is a flowchart of a timeslot aggregation method according to an embodiment of the present invention;
fig. 4a and 4b are two dual-slot aggregated DMRS patterns according to an embodiment of the present invention;
fig. 5a and 5b are two dual-slot aggregated DMRS patterns according to another embodiment of the present invention;
fig. 6a and fig. 6b are two dual-slot aggregated DMRS patterns according to another embodiment of the present invention;
fig. 7 is a schematic structural diagram of a timeslot aggregation apparatus according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of a design module of the apparatus of FIG. 7;
fig. 9 is a schematic structural diagram of a configuration unit in the design module shown in fig. 8.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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.
An embodiment of the present invention provides a time slot aggregation method, as shown in fig. 3, the method includes:
and S11, designing the DMRS patterns of a plurality of time slots based on the double-time-slot aggregation DMRS pattern.
Assuming that the number of symbols of each of the plurality of slots is 14, if only two slots are aggregated, configuring the two slots into a dual-slot aggregated DMRS pattern, which specifically includes:
a pre-DMRS, referred to herein as a DMRS indicating that the data precedes/precedes the DMRS on the first slot, is configured in the first slot, which may be 1 symbol or 2 symbols, and no DMRS is transmitted in the second slot. The DMRS pattern of the mode of dual-slot aggregation is marked as mode 1, and in the mode 1, all ports have no DMRS in the second slot, so that the overhead of the DMRS can be reduced, more resources occupied by transmission data are ensured, and the data transmission rate is improved.
When the pre-DMRS is 1 symbol, one configuration of the dual-slot aggregation DMRS pattern in mode 1 is shown in fig. 4 a; one configuration of the dual-slot aggregated DMRS pattern for mode 1 when the preamble DMRS is 2 symbols is shown in fig. 4 b.
Further, after configuring the pre-DMRS in the first slot, configuring a post-DMRS in the second slot, where the post-DMRS is a DMRS that indicates to be present on any one/two symbols in the second half of the second slot, the number of symbols of the post-DMRS is the same as the number of symbols of the pre-DMRS, and the frequency-domain density of the post-DMRS is equal to the frequency-domain density of the pre-DMRS. The double-slot aggregation DMRS pattern in the mode is marked as a mode 2, and in the mode 2, the extrapolation proportion of channel estimation can be reduced, so that the accuracy of channel estimation in medium and low speed movement is improved.
When the front DMRS and the rear DMRS respectively occupy 1 symbol, one configuration of the dual slot aggregation DMRS pattern of the mode 2 is as shown in fig. 5a, where the DMRS of the second slot is located in one symbol of the last 7 symbols of the slot; when the front DMRS and the rear DMRS occupy 2 symbols, one configuration of the dual-slot aggregation DMRS pattern of mode 2 is shown in fig. 5b, and the DMRS of the second slot is located in two symbols of the last 7 symbols of the slot.
Preferably, in order to guarantee the mobility requirement on a part of ports and simultaneously reduce DMRS overhead, a post DMRS is configured in the second time slot, and the frequency domain density of the post DMRS is smaller than that of the pre-DMRS. The dual-slot aggregated DMRS pattern in this mode is denoted as mode 3, and in mode 3, some ports have no DMRS in the second slot.
When the front DMRS and the rear DMRS respectively occupy 1 symbol, one configuration of the dual slot aggregation DMRS pattern in mode 3 is shown in fig. 6 a; when the front DMRS and the rear DMRS occupy 2 symbols, one configuration of the mode 3 dual-slot aggregation DMRS pattern is shown in fig. 6b,
further, when the number of the aggregated slots exceeds 2, extending by using the configured double-slot aggregated DMRS pattern as a period, for example, when the number of the aggregated slots is 3, the DMRS patterns aggregated in the first two slots are used in the double-slot aggregated DMRS patterns, and the DMRS pattern in the first slot in the double-slot aggregated DMRS patterns is used in the last slot; when the number of the aggregated time slots is 4, the dual-slot aggregated DMRS patterns are used in the first two time slots and the last two time slots, that is, when multiple time slots are aggregated, all the time slots at odd positions use the DMRS pattern of the first time slot in the dual-slot aggregated DMRS patterns, and all the time slots at even positions use the DMRS pattern of the second time slot in the dual-slot aggregated DMRS patterns.
In the above embodiments, each slot includes 14 symbols. It should be noted that, when each slot contains 7 symbols, the embodiments of the present invention are also applicable, and in this case, the meanings of the pre-DMRS and the post-DMRS are not changed.
S12, receiving scheduling signaling, wherein the scheduling signaling contains indication information of the DMRS patterns of the plurality of time slots.
In the above embodiment, three patterns of the dual-slot aggregation DMRS pattern are introduced, and a pattern in which the same DMRS pattern is used in the second slot and the first slot in the prior art is denoted as pattern 0, so that 4 patterns may exist in the dual-slot aggregation DMRS pattern.
The indication information included in the scheduling signaling may indicate that any one of a mode 0 to a mode 3 is finally adopted by the DMRS patterns of the multiple time slots.
S13, scheduling the time slots according to the scheduling signaling.
The time slot polymerization method provided by the embodiment of the invention designs the DMRS patterns of a plurality of time slots based on the double time slot polymerization DMRS pattern, receives the scheduling signaling containing the indication information of the DMRS patterns of the plurality of time slots and schedules the plurality of time slots according to the scheduling signaling.
An embodiment of the present invention further provides a timeslot aggregation device, as shown in fig. 7, where the device includes:
a designing module 71, configured to design DMRS patterns of multiple slots based on a dual-slot aggregation DMRS pattern;
a receiving module 72, configured to receive a scheduling signaling, where the scheduling signaling includes indication information of DMRS patterns of the multiple time slots;
a scheduling module 73, configured to schedule the plurality of time slots according to the scheduling signaling.
Alternatively, as shown in fig. 8, the design module 71 includes:
a configuring unit 711, configured to configure a first slot and a second slot of the plurality of slots into a dual-slot aggregated DMRS pattern;
a continuation unit 712, configured to start from a third slot in the multiple slots, and continue a subsequent slot with the dual-slot aggregated DMRS pattern as a period.
Alternatively, as shown in fig. 9, the configuration unit 711 includes:
a first configuration subunit 7111, configured to configure a preamble DMRS in the first time slot, where the number of symbols of the preamble DMRS is 1 or 2.
A second configuration subunit 7112, configured to configure, in the second slot, a post DMRS, where the number of symbols of the post DMRS is the same as the number of symbols of the pre DMRS, and a frequency domain density of the post DMRS is equal to or less than a frequency domain density of the pre DMRS.
Optionally, the number of symbols in each of the plurality of slots is 7 or 14.
The time slot polymerization device provided by the embodiment of the invention designs the DMRS patterns of a plurality of time slots based on the double time slot polymerization DMRS pattern, receives the scheduling signaling containing the indication information of the DMRS patterns of the plurality of time slots and schedules the plurality of time slots according to the scheduling signaling.
The embodiment of the invention also provides a base station, which comprises the time slot aggregation device.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A method for time slot aggregation, comprising:
receiving scheduling signaling, wherein the scheduling signaling contains indication information of DMRS patterns of a plurality of time slots, and the DMRS patterns of the plurality of time slots have the following characteristics: a first time slot and a second time slot in the plurality of time slots are configured into a double-time-slot polymerization DMRS pattern, and from a third time slot, a subsequent time slot is extended by taking the double-time-slot polymerization DMRS pattern as a period;
scheduling the plurality of time slots according to the scheduling signaling.
2. The method of claim 1, wherein configuring a first slot and a second slot of the plurality of slots into a dual-slot aggregated DMRS pattern comprises:
configuring a preamble DMRS in the first time slot, wherein the symbol number of the preamble DMRS is 1 or 2.
3. The method of claim 2, wherein configuring a first slot and a second slot of the plurality of slots into a dual-slot aggregated DMRS pattern further comprises:
configuring a post DMRS in the second slot after configuring a pre-DMRS in the first slot, wherein the number of symbols of the post DMRS is the same as that of the pre-DMRS, and the frequency domain density of the post DMRS is equal to or less than that of the pre-DMRS.
4. The method of claim 1, wherein the number of symbols in each of the plurality of slots is 7 or 14.
5. A slot aggregation apparatus, comprising:
a receiving module, configured to receive a scheduling signaling, where the scheduling signaling includes indication information of DMRS patterns of multiple time slots, where the DMRS patterns of the multiple time slots have the following characteristics: a first time slot and a second time slot in the plurality of time slots are configured into a double-time-slot polymerization DMRS pattern, and from a third time slot, a subsequent time slot is extended by taking the double-time-slot polymerization DMRS pattern as a period;
and the scheduling module is used for scheduling the plurality of time slots according to the scheduling signaling.
6. The apparatus of claim 5, wherein the first and second ones of the plurality of slots being configured as a dual-slot aggregated DMRS pattern comprises:
configuring a preamble DMRS in the first time slot, wherein the symbol number of the preamble DMRS is 1 or 2.
7. The apparatus of claim 6, wherein a first slot and a second slot of the plurality of slots are configured as a dual-slot aggregated DMRS pattern, further comprising:
configuring a post DMRS in the second slot after configuring a pre-DMRS in the first slot, wherein the number of symbols of the post DMRS is the same as that of the pre-DMRS, and the frequency domain density of the post DMRS is equal to or less than that of the pre-DMRS.
8. The apparatus of claim 5, wherein the number of symbols in each of the plurality of slots is 7 or 14.
9. A base station, characterized in that it comprises a slot aggregation apparatus according to any one of claims 5 to 8.
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| WO2021207958A1 (en) * | 2020-04-15 | 2021-10-21 | Oppo广东移动通信有限公司 | Reference signal processing method and apparatus, and readable storage medium |
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| US9014020B2 (en) * | 2011-05-02 | 2015-04-21 | Blackberry Limited | Methods and systems of wireless communication with remote radio heads |
| US20130064216A1 (en) * | 2011-09-12 | 2013-03-14 | Research In Motion Limited | DMRS Association and Signaling for Enhanced PDCCH in LTE Systems |
| EP2779495B1 (en) * | 2011-11-13 | 2021-03-24 | LG Electronics Inc. | Method and apparatus for transmitting control information in wireless communication system |
| US9119120B2 (en) * | 2012-01-23 | 2015-08-25 | Intel Corporation | Network assisted user association and offloading techniques for integrated multi-rat heterogeneous networks |
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| R1-1612328 "DMRS placement in transmission slots aggregation";Ericsson;《3GPP TSG-RAN WG1 #87》;20161104;全文 * |
| R1-1702072 "Discussion on DMRS design for DL";CATT;《3GPP TSG RAN WG1 #88》;20170207;全文 * |
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