CN106533632B - Management method and management device of downlink control information, base station and terminal - Google Patents
Management method and management device of downlink control information, base station and terminal Download PDFInfo
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- CN106533632B CN106533632B CN201611243811.XA CN201611243811A CN106533632B CN 106533632 B CN106533632 B CN 106533632B CN 201611243811 A CN201611243811 A CN 201611243811A CN 106533632 B CN106533632 B CN 106533632B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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Abstract
The invention provides a management method, a management device, a base station and a terminal of downlink control information, wherein the management method of the downlink control information is used for the base station and comprises the following steps: configuring first dedicated downlink control information and second dedicated downlink control information corresponding to a terminal scheduled by a target TTI (transmission time interval), wherein the second dedicated downlink control information is borne in a frequency domain range of a resource module group corresponding to the terminal, the first dedicated downlink control information comprises identification information of the resource module group corresponding to the terminal, and the duration of the target TTI is less than 1 ms; and sending the first exclusive downlink control information and the second exclusive downlink control information to the terminal. Through the technical scheme of the invention, the frequency of the terminal for blind detection of the second exclusive downlink control information can be effectively reduced, and the efficiency of demodulating the downlink control information is improved.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for managing downlink control information, a base station, and a terminal.
Background
In the current LTE (Long Term Evolution) system, Downlink data transmitted from a base station to a terminal is carried on a PDSCH (Physical Downlink Shared Channel), and corresponding to the Downlink data, DCI (Downlink Control Information) transmitted on a PDCCH (Physical Downlink Control Channel) transmitted in the same TTI (Transmission Time Interval) as the PDSCH is also transmitted. The DCI is used to instruct the terminal to demodulate various information required for corresponding downlink data, such as an RB (Resource Block) in which the downlink data is located, a modulation and coding format used, and a redundancy version. The terminal firstly receives the PDCCH and tries demodulation, and when the DCI information in the PDCCH is correctly demodulated, the DCI information is used for demodulating the received data information of the PDSCH in the same TTI.
However, in some cases, such as channel burst interference, the terminal may not be able to demodulate correctly. If the terminal fails to correctly demodulate the downlink data information of the corresponding PDSCH after demodulating the DCI, the terminal feeds back NACK (Negative acknowledgement) to the base station, if the terminal correctly demodulates, the terminal feeds back ACK to the base station, and if the terminal fails to correctly demodulate the DCI information in the PDCCH (and correspondingly, the terminal also fails to demodulate the PDSCH), the terminal feeds back DTX (Discontinuous Transmission) to the base station. If the base station receives NACK, it knows that the data information of the terminal is received incorrectly, and initiates retransmission of downlink data at the next appropriate time, and the retransmission generally uses a new redundancy version. If the base station receives DTX and knows that the DCI of the terminal is received incorrectly, the base station will send data again at the next appropriate moment. When data is retransmitted, power enhancement processing may be performed on the PDCCH channel to ensure demodulation performance of the PDCCH, and in addition, a redundancy version of retransmitted data may be the same as that of the last data transmission, and a new redundancy version does not need to be replaced.
With the development of the mobile internet, a large number of application services satisfying various specific functions are emerging. Some of the services have low requirements on data delay, such as sending and receiving mails, downloading movies, etc.; however, there are other services that have strict requirements on data delay, such as online games, robbery, red packet robbery, etc., and these services usually require the user data delay to be as short as possible. In LTE networks, the transmission time interval TTI is an important indicator that affects the user data delay. A TTI (legacy TTI) adopted by the current LTE system is 1ms, that is, one subframe, a transmitting end transmits a data block every 1ms, and a receiving end can receive a data block every 1 ms.
The subject of using shorter TTIs in LTE networks is well established in 3GPP RAN #69, investigating the feasibility and possible beneficial effects of using shorter duration TTIs (short-TTIs, hereinafter abbreviated as sTTI, e.g. 0.5ms, etc.). At present, some documents such as [ R1-160942] [ R1-160930] quantitatively study the influence of the reduction of the TTI duration on the LTE data delay, and analysis shows that the TTI duration is not only the transmission time interval of the base station and the terminal is shortened, but also the data processing time corresponding to the transmission interval is correspondingly reduced, for example, the data coding modulation time and the data demodulation time are both reduced along with the reduction of the data block size. In a LTE network of a subsequent release, a situation may occur in which UEs (User equipments) using both transmission intervals of legacy TTI and sTTI coexist. On the radio resource partition of the LTE system, it may also happen that a part of the frequency resources use legacy TTIs and another part of the frequency resources use sTTI. A legacy TTI duration may include multiple sttis.
In the LTE network, for flexible adaptive scheduling, each legacy TTI has downlink control information for the TTI. The downlink control information is carried in the first n OFDM (Orthogonal Frequency Division Multiplexing) symbols of the entire system bandwidth (n is 1-4, and values may be different according to specific system configuration), and includes common downlink control information for all UEs in a cell and UE-specific downlink control information for each UE. The common Control information mainly includes information indicating that the Control Channel resources occupy the number of OFDM symbols (carried on a Physical Control Format Indicator Channel (PCFICH)), HARQ ACK/NACK feedback information for uplink data (carried on a Physical Hybrid ARQ Indicator Channel (PHICH)), paging, random access response, broadcast information, and the like (carried on a PDCCH and mapped in a common search space). The UE-specific downlink control information mainly includes time-frequency resources allocated by the UE, a modulation coding format, a HARQ (Hybrid Automatic Repeat reQuest ) process number, uplink frequency hopping, uplink power control information, and the like (which are carried on a PDCCH channel and generally mapped in a UE-specific search space). On the resource using the sTTI, if the design of the downlink control channel same as the legacy TTI is also adopted, that is, each sTTI has independent downlink control information, including common downlink control information and UE-specific downlink control information. The downlink control information resource overhead for the sTTI in the same time period will be multiple times of the legacy TTI (depending on the time length multiple relationship of legacy TTI to sTTI). Too large downlink control information resource overhead affects the data transmission efficiency of the sTTI, and the effect of reducing the time delay of the sTTI is difficult to be exerted.
In the related art, to solve the above problem, a two-layer control information design is adopted, in the method, dedicated control information of the UE using the sTTI is divided into two layers, namely a slow level and a fast level, as shown in fig. 1, the slow control information is carried in legacy downlink control channel resources, and a first plurality of OFDM symbols of each sTTI are set as sPDCCH channel resources for carrying the dedicated fast downlink control information of the UE using the sTTI resources. The UE using the sTTI needs to obtain actual downlink control information according to the slow control information and the fast control information. As only the quick control information needs to be updated in each sTTI, the control information overhead in the sTTI is reduced, and meanwhile, the scheduling flexibility in the sTTI is met.
In order to obtain the downlink control message, the UE needs to search and blind-check the time-frequency resources that may carry the control information one by one in the search space according to a predetermined search rule in a blind-check manner until the control information of the UE is detected or the search space is exhausted. At present, the rule for searching and blind detecting downlink control information in the LTE system can be found in 3GPP standard TS 36.213. Under the condition of a given search rule, obviously, the smaller the search space is, the fewer blind detection times are needed for demodulating the target control information. In the above design method of the dual-layer control message, the terminal needs to demodulate the fast control information in a blind detection manner at each sTTI, and if the number of blind detections required for demodulating the fast control information is not reduced, the demodulation speed of the control information is affected, and thus, no effective solution exists at present.
Disclosure of Invention
based on at least one of the above technical problems, the present invention provides a new management scheme for downlink control information, which can effectively reduce the number of attempts for a terminal to blindly detect second dedicated downlink control information and improve the efficiency of demodulating downlink control information.
In view of this, the present invention provides a method for managing downlink control information, which is used for a base station, and includes: configuring first dedicated downlink control information and second dedicated downlink control information corresponding to a terminal scheduled by a target TTI (transmission time interval), wherein the second dedicated downlink control information is borne in a frequency domain range of a resource module group corresponding to the terminal, the first dedicated downlink control information comprises identification information of the resource module group corresponding to the terminal, and the duration of the target TTI is less than 1 ms; and sending the first exclusive downlink control information and the second exclusive downlink control information to the terminal.
In the technical scheme, by configuring the first dedicated downlink control information and the second dedicated downlink control information corresponding to the terminal scheduled by the target TTI (i.e. sTTI), and transmits first dedicated downlink control information and second dedicated downlink control information to the terminal, the second dedicated downlink control information being carried in a frequency domain range of a resource module group corresponding to the terminal, the first dedicated downlink control information including identification information of the resource module group corresponding to the terminal, the second dedicated downlink control information being carried only in the frequency domain range of the resource module group indicated by the first dedicated downlink control information of the terminal, but not in the frequency domain range occupied by the entire sTTI, because the frequency domain range of the resource module group is smaller, the search space of the terminal is very small when the terminal performs blind detection, and a precondition guarantee is provided for reducing the number of times of trying to perform blind detection on the second exclusive downlink control information by the terminal and rapidly demodulating the control information.
In the above technical solution, preferably, the method further includes: and sending an indication signaling for expressing the association relation between the identification information of the resource module group and the frequency domain range of the resource module group to the terminal.
In the technical scheme, the indication signaling for representing the association relation between the identification information of the resource module group and the frequency domain range of the resource module group is sent to the terminal, so that the precondition guarantee is provided for the follow-up terminal to determine the search space during blind detection based on the indication signaling.
in any one of the above technical solutions, preferably, the indication signaling includes RRC signaling.
In the technical solution, an RRC (Radio Resource Control) signaling may be used to indicate an association relationship between the identification information of the Resource module group and the frequency domain range of the Resource module group.
According to a second aspect of the present invention, a method for managing downlink control information is provided, where the method is used for a terminal, and includes: receiving first exclusive downlink control information and second exclusive downlink control information sent by a base station in a process of scheduling the terminal by a target TTI (transmission time interval), wherein the second exclusive downlink control information is borne in a frequency domain range of a resource module group corresponding to the terminal, the first exclusive downlink control information comprises identification information of the resource module group corresponding to the terminal, and the duration of the target TTI is less than 1 ms; determining the frequency domain range of the resource module group according to the identification information corresponding to the resource module group; and in the frequency domain range of the resource module group, the second exclusive downlink control information is detected in a blind manner.
in the technical scheme, in the process of scheduling the terminal by the target TTI, the first dedicated downlink control information and the second dedicated downlink control information are received, the second dedicated downlink control information is carried in the frequency domain range of the resource module group corresponding to the terminal, the first dedicated downlink control information comprises the identification information of the resource module group corresponding to the terminal, the frequency domain range of the resource module group is determined according to the identification information corresponding to the resource module group, the second dedicated downlink control information is detected in the frequency domain range of the resource module group in a blind mode, the second dedicated downlink control information is only carried in the frequency domain range of the resource module group indicated by the first dedicated downlink control information of the terminal but not in the frequency domain range occupied by the whole sTTI, and the search space of the terminal during the blind detection is very small due to the small frequency domain range of the resource module group, the number of times of the terminal for blind detection of the second exclusive downlink control information is reduced, the efficiency of obtaining the control information is improved, and the reduction of the whole data processing time delay is facilitated.
In the foregoing technical solution, preferably, the step of determining the frequency domain range of the resource module group according to the identification information corresponding to the resource module group specifically includes: determining the frequency domain range of the resource module group according to the pre-stored association relationship between the identification information of the resource module group and the frequency domain range of the resource module group; or receiving an indication signaling which is sent by the base station and used for representing the association relation between the identification information of the resource module group and the frequency domain range of the resource module group, and determining the frequency domain range of the resource module group according to the indication signaling.
According to a third aspect of the present invention, there is provided an apparatus for managing downlink control information, for a base station, including: a configuration unit, configured to configure first dedicated downlink control information and second dedicated downlink control information corresponding to a terminal scheduled by a target TTI, where the second dedicated downlink control information is borne in a frequency domain of a resource module group corresponding to the terminal, the first dedicated downlink control information includes identification information of the resource module group corresponding to the terminal, and a duration of the target TTI is less than 1 ms; a first sending unit, configured to send the first dedicated downlink control information and the second dedicated downlink control information to the terminal.
In the technical scheme, by configuring the first dedicated downlink control information and the second dedicated downlink control information corresponding to the terminal scheduled by the target TTI (i.e. sTTI), and transmits first dedicated downlink control information and second dedicated downlink control information to the terminal, the second dedicated downlink control information being carried in a frequency domain range of a resource module group corresponding to the terminal, the first dedicated downlink control information including identification information of the resource module group corresponding to the terminal, the second dedicated downlink control information being carried only in the frequency domain range of the resource module group indicated by the first dedicated downlink control information of the terminal, but not in the frequency domain range occupied by the entire sTTI, because the frequency domain range of the resource module group is smaller, the search space of the terminal is very small when the terminal performs blind detection, and a precondition guarantee is provided for reducing the number of times of trying to perform blind detection on the second exclusive downlink control information by the terminal and rapidly demodulating the control information.
in the above technical solution, preferably, the method further includes: and a second sending unit, configured to send, to the terminal, an indication signaling for indicating an association relationship between the identification information of the resource module group and the frequency domain range of the resource module group.
In the technical scheme, the indication signaling for representing the association relation between the identification information of the resource module group and the frequency domain range of the resource module group is sent to the terminal, so that the precondition guarantee is provided for the follow-up terminal to determine the search space during blind detection based on the indication signaling.
In any one of the above technical solutions, preferably, the indication signaling includes RRC signaling.
In the technical solution, an RRC (Radio Resource Control) signaling may be used to indicate an association relationship between the identification information of the Resource module group and the frequency domain range of the Resource module group.
according to a fourth aspect of the present invention, an apparatus for managing downlink control information is provided, where the apparatus is used for a terminal, and the apparatus includes: a receiving unit, configured to receive first dedicated downlink control information and second dedicated downlink control information sent by a base station in a process of scheduling the terminal by a target TTI, where the second dedicated downlink control information is carried in a frequency domain range of a resource module group corresponding to the terminal, the first dedicated downlink control information includes identification information of the resource module group corresponding to the terminal, and a duration of the target TTI is less than 1 ms; a determining unit, configured to determine a frequency domain range of the resource module group according to the identification information corresponding to the resource module group; and the processing unit is used for blindly detecting the second dedicated downlink control information in the frequency domain range of the resource module group.
In the technical scheme, in the process of scheduling the terminal by the target TTI, the first dedicated downlink control information and the second dedicated downlink control information are received, the second dedicated downlink control information is carried in the frequency domain range of the resource module group corresponding to the terminal, the first dedicated downlink control information comprises the identification information of the resource module group corresponding to the terminal, the frequency domain range of the resource module group is determined according to the identification information corresponding to the resource module group, the second dedicated downlink control information is detected in the frequency domain range of the resource module group in a blind mode, the second dedicated downlink control information is only carried in the frequency domain range of the resource module group indicated by the first dedicated downlink control information of the terminal but not in the frequency domain range occupied by the whole sTTI, and the search space of the terminal during the blind detection is very small due to the small frequency domain range of the resource module group, the number of times of the terminal for blind detection of the second exclusive downlink control information is reduced, the efficiency of obtaining the control information is improved, and the reduction of the whole data processing time delay is facilitated.
In the foregoing technical solution, preferably, the determining unit is specifically configured to: determining the frequency domain range of the resource module group according to the pre-stored association relationship between the identification information of the resource module group and the frequency domain range of the resource module group; or receiving an indication signaling which is sent by the base station and used for representing the association relation between the identification information of the resource module group and the frequency domain range of the resource module group, and determining the frequency domain range of the resource module group according to the indication signaling.
According to a fifth aspect of the present invention, there is provided a base station, comprising: the apparatus for managing downlink control information according to any one of the above aspects.
According to a sixth aspect of the present invention, there is provided a terminal comprising: the apparatus for managing downlink control information according to any one of the above aspects.
through the technical scheme, the number of times of the terminal for blind detection of the second exclusive downlink control information can be effectively reduced, and the efficiency of demodulating the downlink control information is improved.
Drawings
Fig. 1 is a diagram illustrating resource allocation of a downlink control channel in the related art;
Fig. 2 shows a schematic flow chart of a method for managing downlink control information according to an embodiment of the present invention;
Fig. 3 shows a schematic flow chart of a method of managing downlink control information according to another embodiment of the present invention;
fig. 4 shows a schematic block diagram of a management apparatus of downlink control information according to an embodiment of the present invention;
Fig. 5 shows a schematic block diagram of a management apparatus of downlink control information according to another embodiment of the present invention;
FIG. 6 shows a schematic block diagram of a base station according to an embodiment of the invention;
Fig. 7 shows a schematic block diagram of a terminal according to an embodiment of the invention;
fig. 8 is a diagram illustrating resource allocation of a downlink control channel according to an embodiment of the present invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
Fig. 2 shows a schematic flow chart of a method for managing downlink control information according to an embodiment of the present invention.
As shown in fig. 2, a method for managing downlink control information according to an embodiment of the present invention is applied to a base station, and includes:
step 202, configuring first dedicated downlink control information and second dedicated downlink control information corresponding to a terminal scheduled by a target TTI, where the second dedicated downlink control information is borne in a frequency domain of a resource module group corresponding to the terminal, the first dedicated downlink control information includes identification information of the resource module group corresponding to the terminal, and a duration of the target TTI is less than 1 ms.
Step 204, sending the first dedicated downlink control information and the second dedicated downlink control information to the terminal.
In the technical scheme, by configuring the first dedicated downlink control information and the second dedicated downlink control information corresponding to the terminal scheduled by the target TTI (i.e. sTTI), and transmits first dedicated downlink control information and second dedicated downlink control information to the terminal, the second dedicated downlink control information being carried in a frequency domain range of a resource module group corresponding to the terminal, the first dedicated downlink control information including identification information of the resource module group corresponding to the terminal, the second dedicated downlink control information being carried only in the frequency domain range of the resource module group indicated by the first dedicated downlink control information of the terminal, but not in the frequency domain range occupied by the entire sTTI, because the frequency domain range of the resource module group is smaller, the search space of the terminal is very small when the terminal performs blind detection, and a precondition guarantee is provided for reducing the number of times of trying to perform blind detection on the second exclusive downlink control information by the terminal and rapidly demodulating the control information.
In the above technical solution, preferably, the method further includes: and sending an indication signaling for expressing the association relation between the identification information of the resource module group and the frequency domain range of the resource module group to the terminal.
In the technical scheme, the indication signaling for representing the association relation between the identification information of the resource module group and the frequency domain range of the resource module group is sent to the terminal, so that the precondition guarantee is provided for the follow-up terminal to determine the search space during blind detection based on the indication signaling.
In any one of the above technical solutions, preferably, the indication signaling includes RRC signaling.
In the technical solution, an RRC (Radio Resource Control) signaling may be used to indicate an association relationship between the identification information of the Resource module group and the frequency domain range of the Resource module group.
Specifically, the system needs to first divide the RB resources allocated to sTTI (i.e. the first type of TTI) into a plurality of RB groups, where the RB group division may be agreed in the standard, for example, different system bandwidths correspond to different RB group divisions, and the correspondence between the index of the RB group and the frequency domain position of the actual RB group may be directly queried by the standard protocol; the base station may notify the terminal of the division of the RB group by using RRC signaling or the like. The terminal can thus know the correspondence between the index of the RB group and the frequency domain position of the actual RB group.
And the base station informs the RB group index distributed to the UE through the first exclusive downlink control information of the UE. And the UE can obtain a search space of second exclusive downlink control information after obtaining the index of the RB group through the first exclusive downlink control information. And the UE searches the second exclusive downlink control information in the search space according to a set search rule, namely blindly detecting the second exclusive downlink control information of the terminal. As shown in fig. 8, legacy downlink control channel resource 802 carries first dedicated downlink control information a1 of UE1 and first dedicated downlink control information B1 of UE2, an RB group allocated to UE1 is RB group n1, sTTI downlink control channel resource 804A of UE1 carries second dedicated downlink control information a2 of UE1, sTTI downlink data channel resource 806A of UE1 carries RB resource A3 of UE1, taking UE1 as an example, UE1 detects first dedicated downlink control information a1 corresponding to UE1 in legacy downlink control channel resource 802, and knows that the RB group allocated to UE1 is RB group n1, and UE1 only needs to blindly detect second dedicated downlink control information a2 in a search space of RB group n 1. Since the search space for blind detection of the second dedicated downlink control information is only in the frequency domain range of the RB group n1, the number of blind detections can be greatly reduced compared to blind detection in the frequency domain range occupied by the sTTI.
Fig. 3 shows a schematic flow chart of a method for managing downlink control information according to another embodiment of the present invention.
as shown in fig. 3, a method for managing downlink control information according to another embodiment of the present invention is applied to a terminal, and includes:
Step 302, in the process of scheduling the terminal by a target TTI, receiving first dedicated downlink control information and second dedicated downlink control information sent by a base station, where the second dedicated downlink control information is borne in a frequency domain of a resource module group corresponding to the terminal, the first dedicated downlink control information includes identification information of the resource module group corresponding to the terminal, and a duration of the target TTI is less than 1 ms.
step 304, determining the frequency domain range of the resource module group according to the identification information corresponding to the resource module group.
step 306, the second dedicated downlink control information is detected in a blind manner within the frequency domain of the resource module group.
In the technical scheme, in the process of scheduling the terminal by the target TTI, the first dedicated downlink control information and the second dedicated downlink control information are received, the second dedicated downlink control information is carried in the frequency domain range of the resource module group corresponding to the terminal, the first dedicated downlink control information comprises the identification information of the resource module group corresponding to the terminal, the frequency domain range of the resource module group is determined according to the identification information corresponding to the resource module group, the second dedicated downlink control information is detected in the frequency domain range of the resource module group in a blind mode, the second dedicated downlink control information is only carried in the frequency domain range of the resource module group indicated by the first dedicated downlink control information of the terminal but not in the frequency domain range occupied by the whole sTTI, and the search space of the terminal during the blind detection is very small due to the small frequency domain range of the resource module group, the number of times of the terminal for blind detection of the second exclusive downlink control information is reduced, the efficiency of obtaining the control information is improved, and the reduction of the whole data processing time delay is facilitated.
In the foregoing technical solution, preferably, the step of determining the frequency domain range of the resource module group according to the identification information corresponding to the resource module group specifically includes: determining the frequency domain range of the resource module group according to the pre-stored association relationship between the identification information of the resource module group and the frequency domain range of the resource module group; or receiving an indication signaling which is sent by the base station and used for representing the association relation between the identification information of the resource module group and the frequency domain range of the resource module group, and determining the frequency domain range of the resource module group according to the indication signaling.
Fig. 4 shows a schematic block diagram of a management apparatus of downlink control information according to an embodiment of the present invention.
As shown in fig. 4, a management apparatus 400 of downlink control information according to an embodiment of the present invention is used for a base station, and includes: a configuration unit 402 and a first sending unit 404.
The configuration unit 402 is configured to configure first dedicated downlink control information and second dedicated downlink control information corresponding to a terminal scheduled by a target TTI, where the second dedicated downlink control information is borne in a frequency domain of a resource module group corresponding to the terminal, the first dedicated downlink control information includes identification information of the resource module group corresponding to the terminal, and a duration of the target TTI is less than 1 ms; the first sending unit 404 is configured to send the first dedicated downlink control information and the second dedicated downlink control information to the terminal.
In the technical scheme, by configuring the first dedicated downlink control information and the second dedicated downlink control information corresponding to the terminal scheduled by the target TTI (i.e. sTTI), and transmits first dedicated downlink control information and second dedicated downlink control information to the terminal, the second dedicated downlink control information being carried in a frequency domain range of a resource module group corresponding to the terminal, the first dedicated downlink control information including identification information of the resource module group corresponding to the terminal, the second dedicated downlink control information being carried only in the frequency domain range of the resource module group indicated by the first dedicated downlink control information of the terminal, but not in the frequency domain range occupied by the entire sTTI, because the frequency domain range of the resource module group is smaller, the search space of the terminal is very small when the terminal performs blind detection, and a precondition guarantee is provided for reducing the number of times of trying to perform blind detection on the second exclusive downlink control information by the terminal and rapidly demodulating the control information.
in the above technical solution, preferably, the method further includes: a second sending unit 406, configured to send, to the terminal, an indication signaling for indicating an association relationship between the identification information of the resource module group and the frequency domain range of the resource module group.
in the technical scheme, the indication signaling for representing the association relation between the identification information of the resource module group and the frequency domain range of the resource module group is sent to the terminal, so that the precondition guarantee is provided for the follow-up terminal to determine the search space during blind detection based on the indication signaling.
In any one of the above technical solutions, preferably, the indication signaling includes RRC signaling.
In the technical solution, an RRC (Radio Resource Control) signaling may be used to indicate an association relationship between the identification information of the Resource module group and the frequency domain range of the Resource module group.
fig. 5 shows a schematic block diagram of a management apparatus of downlink control information according to another embodiment of the present invention.
As shown in fig. 5, a management apparatus 500 of downlink control information according to another embodiment of the present invention is applied to a terminal, and includes: a receiving unit 502, a determining unit 504 and a processing unit 506.
The receiving unit 502 is configured to receive, in a process of scheduling the terminal by using a target TTI, first dedicated downlink control information and second dedicated downlink control information sent by a base station, where the second dedicated downlink control information is carried in a frequency domain range of a resource module group corresponding to the terminal, the first dedicated downlink control information includes identification information of the resource module group corresponding to the terminal, and a duration of the target TTI is less than 1 ms; the determining unit 504 is configured to determine a frequency domain range of the resource module group according to the identification information corresponding to the resource module group; the processing unit 506 is configured to blindly detect the second dedicated downlink control information in the frequency domain of the resource module group.
In the technical scheme, in the process of scheduling the terminal by the target TTI, the first dedicated downlink control information and the second dedicated downlink control information are received, the second dedicated downlink control information is carried in the frequency domain range of the resource module group corresponding to the terminal, the first dedicated downlink control information comprises the identification information of the resource module group corresponding to the terminal, the frequency domain range of the resource module group is determined according to the identification information corresponding to the resource module group, the second dedicated downlink control information is detected in the frequency domain range of the resource module group in a blind mode, the second dedicated downlink control information is only carried in the frequency domain range of the resource module group indicated by the first dedicated downlink control information of the terminal but not in the frequency domain range occupied by the whole sTTI, and the search space of the terminal during the blind detection is very small due to the small frequency domain range of the resource module group, the number of times of the terminal for blind detection of the second exclusive downlink control information is reduced, the efficiency of obtaining the control information is improved, and the reduction of the whole data processing time delay is facilitated.
In the foregoing technical solution, preferably, the determining unit 504 is specifically configured to: determining the frequency domain range of the resource module group according to the pre-stored association relationship between the identification information of the resource module group and the frequency domain range of the resource module group; or receiving an indication signaling which is sent by the base station and used for representing the association relation between the identification information of the resource module group and the frequency domain range of the resource module group, and determining the frequency domain range of the resource module group according to the indication signaling.
Fig. 6 shows a schematic block diagram of a base station according to an embodiment of the invention.
As shown in fig. 6, a base station 600 according to an embodiment of the present invention includes: such as a management apparatus 400 of downlink control information shown in fig. 4.
Fig. 7 shows a schematic block diagram of a terminal according to an embodiment of the invention.
as shown in fig. 7, a terminal 700 according to an embodiment of the present invention includes: fig. 5 shows a management apparatus 500 for downlink control information.
The technical scheme of the invention is described in detail in the above with reference to the accompanying drawings, and the invention provides a new management scheme of downlink control information, which can effectively reduce the number of attempts of blind detection of second dedicated downlink control information by a terminal and improve the efficiency of demodulating the downlink control information.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (12)
1. A management method of downlink control information is used for a base station, and is characterized by comprising the following steps:
Configuring first dedicated downlink control information and second dedicated downlink control information corresponding to a terminal scheduled by a target TTI (transmission time interval), wherein the second dedicated downlink control information is borne in a frequency domain range of a resource module group corresponding to the terminal, the first dedicated downlink control information comprises identification information of the resource module group corresponding to the terminal, and the duration of the target TTI is less than 1 ms;
and sending the first exclusive downlink control information and the second exclusive downlink control information to the terminal.
2. the method for managing downlink control information according to claim 1, further comprising:
and sending an indication signaling for expressing the association relation between the identification information of the resource module group and the frequency domain range of the resource module group to the terminal.
3. The method of claim 2, wherein the indication signaling comprises RRC signaling.
4. a management method of downlink control information is used for a terminal, and is characterized by comprising the following steps:
Receiving first exclusive downlink control information and second exclusive downlink control information sent by a base station in a process of scheduling the terminal by a target TTI (transmission time interval), wherein the second exclusive downlink control information is borne in a frequency domain range of a resource module group corresponding to the terminal, the first exclusive downlink control information comprises identification information of the resource module group corresponding to the terminal, and the duration of the target TTI is less than 1 ms;
Determining the frequency domain range of the resource module group according to the identification information corresponding to the resource module group;
And in the frequency domain range of the resource module group, the second exclusive downlink control information is detected in a blind manner.
5. The method for managing downlink control information according to claim 4, wherein the step of determining the frequency domain range of the resource module group according to the identification information corresponding to the resource module group specifically includes:
Determining the frequency domain range of the resource module group according to the pre-stored association relationship between the identification information of the resource module group and the frequency domain range of the resource module group; or
and receiving an indication signaling which is sent by the base station and used for representing the association relation between the identification information of the resource module group and the frequency domain range of the resource module group, and determining the frequency domain range of the resource module group according to the indication signaling.
6. A management apparatus for downlink control information, configured for a base station, comprising:
A configuration unit, configured to configure first dedicated downlink control information and second dedicated downlink control information corresponding to a terminal scheduled by a target TTI, where the second dedicated downlink control information is borne in a frequency domain of a resource module group corresponding to the terminal, the first dedicated downlink control information includes identification information of the resource module group corresponding to the terminal, and a duration of the target TTI is less than 1 ms;
A first sending unit, configured to send the first dedicated downlink control information and the second dedicated downlink control information to the terminal.
7. The apparatus for managing downlink control information according to claim 6, further comprising:
And a second sending unit, configured to send, to the terminal, an indication signaling for indicating an association relationship between the identification information of the resource module group and the frequency domain range of the resource module group.
8. The apparatus for managing downlink control information according to claim 7, wherein the indication signaling comprises RRC signaling.
9. A management device of downlink control information, which is used for a terminal, is characterized by comprising:
a receiving unit, configured to receive first dedicated downlink control information and second dedicated downlink control information sent by a base station in a process of scheduling the terminal by a target TTI, where the second dedicated downlink control information is carried in a frequency domain range of a resource module group corresponding to the terminal, the first dedicated downlink control information includes identification information of the resource module group corresponding to the terminal, and a duration of the target TTI is less than 1 ms;
A determining unit, configured to determine a frequency domain range of the resource module group according to the identification information corresponding to the resource module group;
And the processing unit is used for blindly detecting the second dedicated downlink control information in the frequency domain range of the resource module group.
10. The apparatus for managing downlink control information according to claim 9, wherein the determining unit is specifically configured to:
Determining the frequency domain range of the resource module group according to the pre-stored association relationship between the identification information of the resource module group and the frequency domain range of the resource module group; or
And receiving an indication signaling which is sent by the base station and used for representing the association relation between the identification information of the resource module group and the frequency domain range of the resource module group, and determining the frequency domain range of the resource module group according to the indication signaling.
11. A base station, comprising: management apparatus of downlink control information according to any one of claims 6 to 8.
12. A terminal, comprising: the apparatus for managing downlink control information according to claim 9 or 10.
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| CN110870362B (en) * | 2017-05-02 | 2023-09-12 | 株式会社Ntt都科摩 | Terminal, system and wireless communication method |
| CN109391450B (en) * | 2017-08-11 | 2021-06-01 | 华为技术有限公司 | Data transmission method, network equipment and terminal equipment |
| WO2019028897A1 (en) * | 2017-08-11 | 2019-02-14 | 华为技术有限公司 | Device communication method and apparatus |
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| CN101610564A (en) * | 2009-04-29 | 2009-12-23 | 中兴通讯股份有限公司 | A kind of transmission of Downlink Control Information and detection method |
| CN106131963A (en) * | 2016-06-12 | 2016-11-16 | 珠海市魅族科技有限公司 | Resource allocation method and device, base station |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101610564A (en) * | 2009-04-29 | 2009-12-23 | 中兴通讯股份有限公司 | A kind of transmission of Downlink Control Information and detection method |
| CN106131963A (en) * | 2016-06-12 | 2016-11-16 | 珠海市魅族科技有限公司 | Resource allocation method and device, base station |
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