METHODS FOR UPDATING SYSTEM INFORMATION IN NON-TERRESTRIAL NETWORKS
Methods, systems, and apparatuses for use in wireless communication are disclosed. A method performed by a wireless transmit/receive (WTRU) unit may compromise: receiving information indicating a first tracking area code (TAC) and first TAC validity time information; registering with a network using the first TAC; receiving information indicating a second TAC and second TAC validity time information; determining, based on the first TAC validity time information and the second TAC validity time information, a time period wherein both the first TAC and second TAC are valid; selecting a time within the time period; and transmitting, at the selected time, a connection request.
1 . A method performed by a wireless transmit/receive unit (WTRU), the method comprising:
receiving information indicating a first tracking area code (TAC) and first TAC validity time information;
registering with a network using the first TAC;
receiving information indicating a second TAC and second TAC validity time information;
determining, based on the first TAC validity time information and the second TAC validity time information, a time period wherein both the first TAC and second TAC are valid;
selecting a time within the time period; and
transmitting, at the selected time, a connection request.
2 . The method of claim 1 , wherein the selecting the time within the time period is randomized.
3 . The method of claim 2 , wherein the randomization is based on a WTRU-ID.
4 . The method of claim 2 , wherein the randomization is based on a hash function.
5 . The method of claim 1 , wherein the time period is scaled.
6 . The method of claim 5 , wherein the time period is scaled based on a velocity of the WTRU.
7 . The method of claim 5 , wherein the scaling is based on a mobility status of the WTRU.
8 . The method of claim 1 , wherein the information indicating the first TAC and the first TAC validity time information is received from a moving network node.
9 . (canceled)
10 . The method of claim 1 , wherein the information indicating the second TAC and the second TAC validity time information is received from a moving network node.
11 . (canceled)
12 . The method of claim 1 , wherein an expiration time associated with the first TAC validity time information is adjusted if the WTRU moves more than a threshold distance.
13 . A wireless transmit/receive unit (WTRU), comprising:
a transceiver; and
a processor;
wherein the transceiver and processor are configured to:
receive information indicating a first tracking area code (TAC) and first TAC validity time information;
register with a network using the first TAC;
receive information indicating a second TAC and second TAC validity time information;
determine, based on the first TAC validity time information and the second TAC validity time information, a time period wherein both the first TAC and second TAC are valid;
select a time within the time period; and
transmit, at the selected time, a connection request.
14 . The WTRU of claim 13 , wherein the selection of the time within the time period is randomized.
15 . The WTRU of claim 14 , wherein the randomization is based on a WTRU-ID.
16 . The WTRU of claim 14 , wherein the randomization is based on a hash function.
17 . The WTRU of claim 13 , wherein the time period is scaled.
18 . The WTRU of claim 17 , wherein the time period is scaled based on a velocity of the WTRU.
19 . The WTRU of claim 17 , wherein the time period is scaled based on a mobility status of the WTRU.
20 . The WTRU of claim 13 , wherein the information indicating the first TAC and the first TAC validity time information is received from a moving network node.
21 . (canceled)
22 . The WTRU of claim 13 , wherein the information indicating the second TAC and the second TAC validity time information is received from a moving network node.
23 . (canceled)
24 . The WTRU of claim 13 , wherein an expiration time associated with the first TAC validity time information is adjusted if the WTRU moves more than a threshold distance.