Coverage constrained devices and paging method

Patent metadata

Field	Value
Publication number	US-9769788-B2
Application number	US-201514706152-A
Country	US
Kind code	B2
Filing date	May 7, 2015
Priority date	Oct 6, 2014
Publication date	Sep 19, 2017
Grant date	Sep 19, 2017

Abstract

Devices and methods of paging user equipment (UE) are generally described. An evolved Node-B (eNB) may transmit legacy and extended coverage paging messages having different Paging Radio Network Temporary Identifiers (P-RNTIs) to UEs. Each extended coverage paging message may contain the same information, which coverage constrained UEs may combine to achieve a predetermined link budget and subsequently decode. The coverage constrained UEs may ignore legacy paging messages prior to decoding the legacy paging messages. The extended coverage paging messages may be transmitted in non-legacy paging occasions that may span multiple paging cycles. Each paging cycle may contain 0, 1 or multiple extended coverage paging occasions. The UE may be provided the physical resource blocks (PRBs) used for the extended coverage paging message through a system information message. The PRBs may be assigned as a fixed or semi-statically assigned set of PRBs or a dynamically assigned set of PRBs.

First claim

What is claimed is:

1. User equipment (UE) comprising:
a transceiver configured to transmit and receive signals from an enhanced Node B (eNB) in a network; and
processing circuitry configured to:
configure the transceiver to receive from the eNB different types of paging messages comprising legacy paging messages and extended coverage paging messages, the legacy paging messages received at different times from the extended coverage paging messages, a legacy paging cycle of the legacy paging messages and an extended paging cycle of the extended paging messages being different, the extended coverage paging messages configured to be received at extended coverage paging occasions over the extended paging cycle, at least some of consecutive extended coverage paging occasions being between consecutive legacy paging message occasions and at least some of the consecutive extended coverage paging occasions configured to surround other consecutive legacy paging message occasions:
limit decoding of the paging messages to a determined type of paging messages, the determined type of paging messages determined based whether the UE is coverage constrained; and
decode the determined type of paging messages.

2. The UE of claim 1 , wherein the processing circuitry is further configured to:
configure the transceiver to receive an indication of physical resource blocks (PRBs) used for the extended coverage paging message when the LIE is in a Radio Resource Control (RRC) connected mode.

3. The UE of claim 2 , wherein:
the processing circuitry is further configured to determine limitations on reception of paging messages, the paging messages configured to be received on either a fixed set of PRBs or a semi-statically assigned set of PRBs dependent on the limitations.

4. The UE of claim 2 , wherein the processing circuitry is further configured to:
configure the transceiver to receive an indication of PRBs used for the extended coverage paging messages through a system information message.

5. The UE of claim 1 , wherein:
the extended coverage paging messages are configured to carry the same information.

6. The UE of claim 5 , wherein the processing circuitry is further configured to:
combine the plurality of extended coverage paging messages to form a combined paging message prior to decoding the determined paging message, the plurality of extended coverage paging messages comprising the determined paging message.

7. The UE of claim 1 , wherein:
each of the determined type of paging messages is scrambled using a Paging Radio Network Temporary Identifier (P-RNTI) and transmitted on a physical downlink control channel (PDCCH), and the processing circuitry is further configured to determine whether each paging message is an extended coverage paging message or a legacy paging message based on the P-RNTI.

8. The UE of claim 1 , wherein:
the extended paging cycle is over multiple frames.

9. The UE of claim 1 , wherein the processing circuitry is further configured to:
determine whether each paging message is an extended coverage paging message or a legacy paging message based on a position of the paging message.

10. The UE of claim 1 , further comprising:
an antenna configured to provide communications between the transceiver and the eNB.

11. The UE of claim 1 , wherein:
the extended paging cycle and the extended coverage paging occasions are different for different levels of coverage enhancement.

12. The UE of claim 11 , wherein:
the extended paging cycle and the extended coverage paging occasions for different levels of coverage enhancement are independent, a first extended paging cycle associated with a first level of coverage enhancement is configured to overlap with a second extended paging cycle associated with a second level of coverage enhancement.

13. The UE of claim 1 , wherein the processing circuitry is further configured to:
determine the type of a particular paging message dependent on at least one of a temporal or frequency location of a paging occasion corresponding to the particular paging message free from a determination based on a decoded Paging Radio Network Temporary Identifier (P-RNTI) used to scramble the particular paging message.

14. An apparatus of an eNode B (eNB), the apparatus comprising:
a transceiver configured to communicate with user equipment (UE); and
processing circuitry configured to:
determine whether the UE is in a normal mode or the UE is a coverage constrained LE; and
configure the transceiver to transmit:
multiple extended coverage paging messages to the UE over an extended coverage paging cycle in response to determining that the LE is a coverage constrained UE, and
a legacy paging message over a legacy paging cycle in response to determining that the LIE is in normal mode, the legacy paging messages received at different times from the extended coverage paging messages, a legacy paging cycle of the legacy paging messages and an extended paging cycle of the extended paging messages being different,

wherein the multiple extended coverage paging messages and the legacy paging message are transmitted using different Paging Radio Network Temporary Identifiers (P-RNTIs) on a physical downlink control channel (PDCCH), and
at least some of consecutive extended coverage paging occasions are between consecutive legacy paging message occasions and at least some of the consecutive extended coverage paging occasions surround other consecutive legacy paging message occasions.

15. The apparatus of claim 14 , wherein:
successive ones of the multiple extended coverage paging messages carry the same information, and the extended coverage paging cycle is longer than the legacy paging cycle.

16. The apparatus of claim 14 , wherein the processing circuitry is further configured to:
configure the transceiver to transmit an indication of physical resource blocks (PRBs) used for the extended coverage paging messages through a system information message.

17. The apparatus of claim 14 , wherein the processing circuitry is further configured to:
determine whether the LIE is in a Radio Resource Control (RRC) connected mode, and
configure the transceiver to transmit an indication of physical resource blocks (PRBs) used for the extended coverage paging messages in response to determining that the UE is in the RRC connected mode.

18. The apparatus of claim 14 , wherein the processing circuitry is further configured to:
determine limitations on paging message reception by the UE, and
configure the transmitter to transmit the extended coverage paging messages on either a fixed or semi-statically assigned set of PRBs or a dynamically assigned set of PRBs dependent on the limitations.

19. The apparatus of claim 14 , wherein the processing circuitry is further configured to:
communicate with multiple UEs, at least one of the UEs being a Machine Type Communication (MTC) UE and at least one of the UEs being a non-MTC UE, and configure the transceiver to transmit:
the multiple extended coverage paging messages configured to be received by the MTC UE, and the legacy paging message configured to be received by the non-MTC UE.

20. The apparatus of claim 14 , wherein the processing circuitry is further configured to:
configure the transceiver to transmit the extended coverage paging messages in non-legacy paging occasions.

21. A non-transitory computer-readable storage medium that stores instructions for execution by one or more processors of user equipment (UE

Assignees

• Intel Ip Corp

Inventors

• Jha Satish Chandra
• Gupta Maruti
• Rashid Mohammad Mamunur
• Vannithamby Rath

Classifications

• H04W68/005 Primary

  Transmission of information for alerting of incoming communication · CPC title