Resource sharing method of PDSCH and PDCCH in NR system
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A technology of resource sharing and time-frequency resources, applied in the field of mobile communication, to achieve the effect of wide application
Active Publication Date: 2018-09-14
BEIJING UNIV OF POSTS & TELECOMM
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[0009] The present invention solves the problem of how to design an idle resource indication method so as to realize the effective utilization of CORESET internal resources when PDSCH and PDCCH resources are shared in NR
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Embodiment 1
[0029] A method for PDSCH and PDCCH resource sharing in an NR system, comprising the steps of:
[0030] 1) When the UE is in RRC CONNECTED, the gNB assigns it an index. The gNB has a table, which will correspond the UEID and the index one by one, and notify all UEs through broadcast signaling;
[0031]Once a certain UE leaves the RRC CONNECTED state, the gNB deactivates or deletes the corresponding index. The gNB can set a periodic update list and notify all UEs. In this way, each UE in the RRC CONNECTED state has its own unique index, and it is assumed that the maximum value of the index is K.
[0032] 2) When the sharing of PDCCH and PDSCH is to be realized, the gNB dynamically notifies all UEs capable of resource sharing that all current users are scheduled through a signaling such as broadcast signaling, groupcommon PDCCH or common PDCCH.
[0033] Specifically, the signaling is a binary sequence with a length of K, and whether each user is scheduled or not is represented...
Embodiment 2
[0037] A method for PDSCH and PDCCH resource sharing in an NR system, comprising the steps of:
[0038] 1) gNB configures a table for each CORESET, and matches the UE ID and index that PDCCH may exist in the CORESET one by one, and notifies all UEs through broadcast signaling, assuming that the number of UE indexes in each CORESET does not exceed K .
[0039] 2) The gNB dynamically notifies the UE of the current scheduling situation of each UE through signaling in a bit-mapping manner.
[0040] Since the RRC signaling will notify the user of the time-frequency position of each CORESET, when the UE receives the resources allocated by the gNB for its PDSCH, it can guess which CORESET the part of the PDSCH located in the control domain is in. In this way, the gNB notifies through UEspecific DCI Whether the PDCCH of all UEs in the user's current CORESET exists or not. Specifically, the signaling is a binary sequence with a length of K, and the scheduling of each user is represen...
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Abstract
The invention discloses a resource sharing method of PDSCH and PDCCH in an NR system, and belongs to the technical field of mobile communication. The method comprises the first step that the ID of UEin RRC CONNECTED and the index are corresponding one to one by a gNB to form a mapping table, and all UE is notified of the mapping table; the second step that the gNB adopts a bit mapping manner to notify the UE of the currently scheduled condition of each UE by means of signaling dynamically; the third step that the UE obtains the index of the currently scheduled UE according to the signaling inthe second step, infers the ID of the UE scheduled by the gNB currently according to the mapping table obtained in the first step, and calculates search space in which DCI exists through combinationof the slot number and the CORESET serial number; and the fourth step that during resource mapping, the UE avoids time frequency resources corresponding to the search space to realize the resource sharing of PDCCH and PDSCH. According to the method, the compromise between the resource utilization rate and the signaling complexity can be realized, and the method can be widely applied to indicate the internal idle resource of CORESET of different sizes.
Description
technical field [0001] The invention belongs to the technical field of mobile communication, and in particular relates to a method for sharing PDSCH and PDCCH resources in an NR system. Background technique [0002] The channel bandwidth of the Long Term Evolution (LTE) system is up to 20MHz, and the control domain occupies the first 1-4 Orthogonal Frequency Division Multiple Access (OFDM) symbols of a subframe in the time domain, and occupies the entire system bandwidth in the frequency domain. However, the channel bandwidth in the NR (new air interface) system is as high as 400MHz. On the one hand, considering the limited bandwidth capability of some user equipment (UE), on the other hand, in order to prevent the UE from detecting PDCCH (Physical Downlink Control Channel, referring to The most important thing is the physical downlink control channel) causing high power consumption. NR introduces the concept of control resource set (CORESET). CORESET is a time-frequency re...
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