A scheduling method and device

Abstract

The present application discloses a scheduling method and device for dynamically scheduling MSG2 and MSG3 based on time slots, thereby increasing the success rate of terminal access. A scheduling method provided by an embodiment of the present application includes: determining a first time slot, the first time slot is the time when the first message sent by the terminal is received; according to the first time slot, from the preset parameter set Select the parameter K2, and select the downlink time slot corresponding to the parameter K2 as the second time slot, so that the third time slot determined by the sum of the second time slot, K2 and the preset offset value is the uplink time slot; if the If there is no resource collision between the second time slot and other unshareable downlink time slots, it is determined to schedule the second message according to the second time slot and schedule the third message according to the third time slot.

Description

technical field [0001] The present application relates to the field of communication technologies, and in particular to a scheduling method and device. Background technique [0002] Such as figure 1 As shown in the initial random access process, after the terminal sends message (MSG) 1, it detects whether there is MSG2 within the preset time period (Timer). If MSG2 is not received within this time interval, it considers that MSG2 over-window access has failed, and the terminal Random access will be re-initiated. [0003] The 38.211 agreement stipulates that the air interface time relationship between MSG2 and MSG3 needs to satisfy MSG2_slot + K2 + delta = MSG3_slot, and the time interval between MSG2 and MSG3 must not be less than the preset value N. Among them, the parameter K2 is a field in the PUSCH-Time Domain Resource Allocation in the protocol, which is used to indicate the time interval between the PUSCH and the PDCCH that schedules the PUSCH slot, in units of slots...

AI Technical Summary

Problems solved by technology

[0013] When the media access control (MAC) entity receives MSG1 in time slot 2 (slot2), according to the static table, it will schedule MSG2 in slot7 of the current half-frame, and schedule MSG3 in slot9 of the next half-frame, and the value of K2 is 9. If slot7 happens to have channel state information (CSI) and other downlink elements that cannot share the slot with MSG2, the scheduling of MSG2 and MSG3 should be postponed by one slot, using the current scheduling table of slot3, MSG2 will be scheduled in slot2 of the next half frame, and MSG3 will be scheduled in the next half frame. The slot9 scheduling of the frame causes MSG2 to be delayed by 5 slots backward, and it is easy to cause the window to exceed the Timer.

[0014] To sum up, the static scheduling sequence does not make full use of the K2 value supported by the terminal, artificially reducing the number of scheduling sequences that meet the protocol; the static scheduling table is relatively rigid, and has poor adjustment ability for occasional conflicts; it is easy to cause scheduling to exceed Timer , leading to access failure; the static scheduling table needs to formulate different tables according to the current subcarrier spacing, and the compatibility is poor

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