Method and Apparatus for Determining Transmission Time Interval, Base Station and User Equipment

Content Provider	The Lens
Abstract	A method and an apparatus are provided for adjusting TTI, a base station and UE. The method includes: a type of a data service used by UE is determined; based on the type of the data service used by the UE, first length information and a first carrier frequency for the first TTI are allocated for the UE; and downlink control signaling is sent to the UE, where the downlink control signaling carries the first length information and the carrier frequency for the first TTI. With the technical solutions of the present disclosure, the UE uses the first TTI with a relatively short length for the latency-sensitive data service, and the UE appropriately uses the first TTI with a relatively long length for the latency-insensitive data service, thereby ensuring the UE is able to flexibly adjust the length of the first TTI when processing the data service.
Related Links	https://www.lens.org/lens/patent/011-049-584-213-399/frontpage
Language	English
Publisher Date	2019-09-12
Access Restriction	Open
Content Type	Text
Resource Type	Patent
Jurisdiction	United States of America
Date Applied	2019-05-28
Applicant	Beijing Xiaomi Mobile Software Co Ltd
Application No.	201916423875
Claim	A method of determining a transmission time interval (TTI), comprising: determining, by a base station, a type of a data service used by a user equipment; allocating, by the base station, first length information for a first TTI and a first carrier frequency for the first TTI to the user equipment based on the type of the data service used by the user equipment; and sending, by the base station, downlink control signaling to the user equipment, wherein the downlink control signaling comprises the first length information and the carrier frequency for the first TTI. The method according to claim 1 , further comprising: in at least one TTI provided by the base station, determining two adjacent carriers beyond a preset frequency range but within a base station carrier frequency range, wherein the preset frequency range is within the base station carrier frequency range; for TTIs corresponding to the two adjacent carriers respectively, determining a first time-frequency resource position within an overlapped resource between a physical downlink shared channel of one of the TTIs and a physical downlink control channel of the other of the TTIs; and setting the first time-frequency resource position within the physical downlink shared channel of the one of the TTIs to blank. The method according to claim 1 , further comprising: determining adjacent carriers used by the base station and a neighboring base station of the base station; determining TTIs respectively used by each of the adjacent carriers; in the TTIs respectively used by the adjacent carriers, determining a second time-frequency resource position within an overlapped resource between a physical downlink shared channel of one of the TTIs and a physical downlink control channel of the other of the TTIs; and setting the second time-frequency resource position within the physical downlink shared channel to blank. The method according to claim 2 , further comprising: determining second length information for a second TTI in a preset frequency range for the base station, wherein the preset frequency range is within the base station carrier frequency range; and sending broadcast signaling to a cell, wherein the second length information is carried in the broadcast signaling. The method according to claim 4 , wherein a length of the first TTI is an integer multiple or an integer fraction of a length of the second TTI. The method according to claim 5 , wherein the length of the first TTI is a multiple of 2 n or ½ n to the length of the second TTI, wherein n is a positive integer. A method of determining a TTI, the method being applied in user equipment, comprising: receiving broadcast signaling from a base station; obtaining reference length information for a reference TTI in a preset frequency range from the broadcast signaling, wherein the preset frequency range is within a base station carrier frequency range; demodulating downlink control signaling from the base station with a length corresponding to the reference length information to obtain first length information for a first TTI associated with the user equipment, wherein the first length information is determined based on a type of a service currently used by the user equipment. The method according to claim 7 , wherein a length of the reference TTI is an integer multiple or an integer fraction of a length of the first TTI. The method according to claim 8 , wherein the length of the reference TTI is a multiple of 2 n or ½ n to the length of the first TTI, wherein n is a positive integer. Abase station, comprising: a processor; and a memory to store processor executable instructions; wherein the executable instructions cause the processor to performing acts comprising: determining a type of a data service used by user equipment; allocating first length information for a first TTI and a first carrier frequency for the first TTI to the user equipment based on the type of the data service used by the user equipment; and sending downlink control signaling to the user equipment, wherein the downlink control signaling comprises the first length information and the carrier frequency for the first TTI. The base station according to claim 10 , wherein the acts further comprise: in at least one TTI provided by the base station, determining two adjacent carriers beyond a preset frequency range but within a base station carrier frequency range, wherein the preset frequency range is within the base station carrier frequency range; for TTIs corresponding to the two adjacent carriers respectively, determining a first time-frequency resource position within an overlapped resource between a physical downlink shared channel of one of the TTIs and a physical downlink control channel of the other of the TTIs; and setting the first time-frequency resource position within the physical downlink shared channel of the one of the TTIs to blank. The base station according to claim 10 , wherein the acts further comprise: determining adjacent carriers used by the base station and a neighboring base station of the base station; determining TTIs respectively used by each of the adjacent carriers; in the TTIs respectively used by the adjacent carriers, determining a second time-frequency resource position within an overlapped resource between a physical downlink shared channel of one of the TTIs and a physical downlink control channel of the other of the TTIs; and setting the second time-frequency resource position within the physical downlink shared channel of the one of the TTIs to blank. The base station according to claim 11 , wherein the acts further comprise: determining second length information for a second TTI in a preset frequency range for the base station, wherein the preset frequency range is within the base station carrier frequency range; and sending broadcast signaling to a cell, wherein the second length information is carried in the broadcast signaling. The base station according to claim 13 , wherein a length of the first TTI is an integer multiple or an integer fraction of a length of the second TTI. The base station according to claim 14 , wherein the length of the first TTI is a multiple of 2 n or ½ n to the length of the second TTI, wherein n is a positive integer. User equipment, comprising: a processor; and a memory to store processor executable instructions; wherein the processor is caused to execute the method of claim 7 . The user equipment according to claim 16 , wherein a length of the second TTI is an integer multiple or an integer fraction of a length of the first TTI. The user equipment according to claim 17 , wherein the length of the second TTI is a multiple of 2 n or ½ n to the length of the first TTI, wherein n is a positive integer. A non-transitory machine readable storage medium storing instructions, comprising instructions, wherein the instructions are executed to perform operations of the method of claim 7 .
CPC Classification	TRANSMISSION OF DIGITAL INFORMATION; e.g. TELEGRAPHIC COMMUNICATION WIRELESS COMMUNICATION NETWORKS
Extended Family	048-899-830-944-001 011-049-584-213-399 003-730-245-262-134 151-116-819-427-345 099-238-306-425-733
Patent ID	20190281617
Inventor/Author	Zhou Juejia
IPC	H04W72/12 H04W72/04
Status	Active
Owner	Beijing Xiaomi Mobile Software Co. Ltd
Simple Family	048-899-830-944-001 011-049-584-213-399 099-238-306-425-733 151-116-819-427-345 003-730-245-262-134
CPC (with Group)	H04L5/0008 H04L5/0064 H04L5/0082 H04L5/0087 H04W72/0446 H04W72/0453 H04W72/53 H04L5/0007 H04L5/0044 H04W72/23 H04W72/1215 H04L5/0053 H04W8/245 H04W28/0215 H04W72/12 H04W72/1263 H04W72/51 H04W72/535 H04W84/042 H04W88/06 H04W88/10 H04W92/10
Issuing Authority	United States Patent and Trademark Office (USPTO)
Kind	Patent Application Publication