Downlink information transmitting method and device and downlink information receiving method and device
A technology for receiving and controlling information, applied in the field of intelligent transportation, and can solve problems such as sTTI that cannot support new granularity
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Embodiment 1
[0126] The base station schedules the sPDSCH through two-level DCI. The first-level DCI indicates that the sTTI band has a fixed sTTI length / pattern, and different sTTI bands independently determine their respective sTTI lengths / patterns. The first-level DCI is located in the LegacyPDCCH, or in the first sTTI.
[0127] Figure 11 It is a schematic diagram of independently determining the sTTI length in different sTTI bands according to an embodiment of the present invention and having the same sTTI length in the same sTTIband, as shown in Figure 11 As shown, different sTTI bands are used for terminal groups or service groups with different delay requirements, and the sTTI length in the same sTTI band is unique. Figure 11 In the above, a subframe contains two sTTI bands as an example, the sTTI lengths in different sTTI bands are determined independently and there is only one sTTI length in the same sTTI band. The specific signaling content is that the first-level DCI indic...
Embodiment 2
[0157] The base station schedules the sPDSCH through two-level DCI. The first level indicates the minimum sTTI length in this subframe, and the second level indicates the sTTI length. The first-level DCI is located in the Legacy PDCCH, or in the first sTTI.
[0158] Detecting sPDCCH needs to know the minimum sTTI length, so that the dynamic sTTI length is notified in the second stage, at least the possible detection OFDM symbol position can be known and not necessarily every OFDM symbol is detected. Simultaneously multiple sTTI bands are still optional. Figure 12 A schematic diagram of determining the sTTI length in the sTTI band as a variable value for the two-level DCI described in the present invention, such as Figure 12 As shown, taking two sTTI bands in a subframe as an example, the sTTI lengths in different sTTI bands are determined independently, with the sTTI at the smallest granularity indicated by the first level, and the second level DCI indicates the variable l...
Embodiment 3
[0180] The base station schedules the sPDSCH through a single DCI.
[0181] sTTI band determination methods include:
[0182] Method A: sTTI band is configured by SIB or RRC (semi-static variable).
[0183] Specifically include: (1) SIB configures one sTTI band; (2) SIB configures multiple sTTI bands, and the sTTI band where the UE is located is determined explicitly (RRC) or implicitly (UE ID / RNTI). (3) RRC configures the sTTI band where the UE is located.
[0184] Method B: The sTTI band is configured similarly to CFI. (Variable at subframe level)
[0185] sTTI length determination method:
[0186] Method 1: sTTI length is configured by SIB or RRC (semi-static variable). Specifically include: (1) SIB configures one sTTI length; (2) (Optional, SIB configures multiple sTTI length sets,) RRC configures specific sTTI lengths according to different sTTI bands, that is, it can be configured in combination {sTTI band, sTTI length} can also be configured separately.
[0187] ...
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