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US 10,771,227 B2Granted
User equipment and method for managing backoff time in the user equipment
AssigneeSamsung Electronics Co., Ltd.
InventorsSang Bum Kim, Kyeong In Jeong, Soeng Hun Kim, Jae Hyuk Jang
Life of this patent
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Abstract
The present invention relates to a method for efficiently controlling an MTC device attempting a delay tolerant access in a 3GPP system. The present invention provides a method for effectively providing a backoff time to prevent load on a wireless network, which can occur when many MTC devices in a single cell simultaneously attempt access.
Claims12
A method of a terminal in a communication system, the method comprising:
- receiving, from a base station associated with a cell, a message including a first information element of categories for classifying at least one terminal according to a public land mobile network (PLMN) of the at least one terminal and a second information element of a backoff value respectively corresponding to each of the categories;
- identifying, in case that a PLMN for the terminal corresponds to one of the categories, a backoff time of a category corresponding to the PLMN for the terminal based on the second information element;
- and
- transmitting, to the base station, a preamble for an initial random access based on the identified backoff time,
- wherein the categories comprises a first category including all the terminals, a second category including one or more terminals except for at least one terminal corresponding to at least one home PLMN (HPLMN) or an equivalent PLMN (ePLMN), and a third category including one or more terminals except for the at least one terminal corresponding to the at least one HPLMN, the ePLMN or a visited PLMN (VPLMN), and
- wherein the identifying further comprises:
- identifying whether the first information element indicates the category corresponding to the PLMN for the terminal;
- determining to apply the backoff time indicated by the second information element, in case that the first information element indicates the category corresponding to the PLMN for the terminal;
- and
- determining to ignore the backoff time indicated by the second information element, in case that the first information element does not indicate the category corresponding to the PLMN for the terminal.
7 more elements
A terminal in a communication system, the terminal comprising:
- a transceiver;
- and
- at least one processor coupled with the transceiver and configured to:
- receive, from a base station associated with a cell, a message including a first information element of categories for classifying at least one terminal according to a public land mobile network (PLMN) and a second information element of a backoff value respectively corresponding to each of the categories,
- identify, in case that a PLMN for the terminal corresponds to one of the categories, a backoff time of a category corresponding to the PLMN for the terminal based on the second information element, and
- transmit, to the base station, a preamble for an initial random access based on the identified backoff time,
- wherein the categories comprises a first category including all the terminals, a second category including one or more terminals except for at least one terminal corresponding to at least one home PLMN (HPLMN) or an equivalent PLMN (ePLMN), and a third category including one or more terminals except for the at least one terminal corresponding to the at least one HPLMN, the ePLMN or a visited PLMN (VPLMN), and
- wherein the at least one processor is further configured to:
- identify whether the first information element indicates the category corresponding to the PLMN for the terminal;
- determine to apply the backoff time indicated by the second information element, in case that the first information element indicates the category corresponding to the PLMN for the terminal;
- and
- determine to ignore the backoff time indicated by the second information element, in case that the first information element does not indicate the category corresponding to the PLMN for the terminal.
9 more elements
A method of a base station in a communication system, the method comprising:
- generating a message including a first information element of categories for classifying at least one terminal according to a public land mobile network (PLMN) of the at least one terminal and a second information element of a backoff value respectively corresponding to each of the categories;
- transmitting, to a terminal, the generated message;
- and
- receiving, from the terminal, a preamble for an initial random access based on a backoff time,
- wherein, in case that a PLMN for the terminal corresponds to one of the categories, the backoff time of a category corresponding to the PLMN for the terminal is identified based on the second information element,
- wherein the categories comprises a first category including all the terminals, a second category including one or more terminals except for at least one terminal corresponding to at least one home PLMN (HPLMN) or an equivalent PLMN (ePLMN), and a third category including one or more terminals except for the at least one terminal corresponding to the at least one HPLMN, the ePLMN or a visited PLMN (VPLMN), and
- wherein whether the first information element indicates the category corresponding to the PLMN for the terminal is identified by the terminal, to apply the backoff time indicated by the second information element is determined by the terminal, in case that the first information element indicates the category corresponding to the PLMN for the terminal, and to ignore the backoff time indicated by the second information element is determined by the terminal, in case that the first information element does not indicate the category corresponding to the PLMN for the terminal.
4 more elements
A base station in a communication system, the base station comprising:
- a transceiver;
- and
- at least one processor coupled with the transceiver and configured to:
- generate a message including a first information element of categories for classifying at least one terminal according to a public land mobile network (PLMN) of the at least one terminal and a second information element of a backoff value respectively corresponding to each of the categories,
- transmit, to a terminal, the generated message, and
- receive, from the terminal, a preamble for an initial random access based on a backoff time,
- wherein, in case that a PLMN for the terminal corresponds to one of the categories, the backoff time of a category corresponding to the PLMN for the terminal is identified based on the second information element,
- wherein the categories comprises a first category including all the terminals, a second category including one or more terminals except for at least one terminal corresponding to at least one home PLMN (HPLMN) or an equivalent PLMN (ePLMN), and a third category including one or more terminals except for the at least one terminal corresponding to the at least one HPLMN, the ePLMN or a visited PLMN (VPLMN), and
- wherein whether the first information element indicates the category corresponding to the PLMN for the terminal is identified by the terminal, to apply the backoff time indicated by the second information element is determined by the terminal, in case that the first information element indicates the category corresponding to the PLMN for the terminal, and to ignore the backoff time indicated by the second information element is determined by the terminal, in case that the first information element does not indicate the category corresponding to the PLMN for the terminal.
6 more elements
Dependencies are inferred from the claim text.