Ran paging mechanism to enable enhanced coverage mode

Patent metadata

Field	Value
Publication number	US-2016135141-A1
Application number	US-201514753158-A
Country	US
Kind code	A1
Filing date	Jun 29, 2015
Priority date	Nov 6, 2014
Publication date	May 12, 2016
Grant date	—

Abstract

Devices and methods of enhanced coverage (EC) paging are generally described. An evolved Node-B (eNB) may transmit multiple EC paging messages to user equipment (UE) over at least one paging cycle. Each EC paging message may contain the same paging information. The UE may combine the individual EC paging messages to achieve a predetermined link budget and subsequently may decode the EC combined paging message to determine whether the combined paging message is directed to the UE. The EC paging messages may contain information for more than one UE and a legacy P-RNTI or a specific P-RNTI for EC mode UEs. The EC paging messages may be transmitted in legacy occasions over several paging cycles or non-legacy paging occasions over one or more paging cycles. The EC paging messages may be transmitted in continuous or non-continuous subframes in a particular paging cycle.

First claim

What is claimed is:

1 . User equipment (UE) comprising:
processing circuitry configured to:
configure a transceiver to receive multiple enhanced coverage (EC) paging messages from an evolved Node-B (eNB) when the UE is in an EC mode;
combine the EC paging messages to form a combined EC paging message; and
decode the combined EC paging message to determine whether the combined paging message is directed to the UE.

2 . The UE of claim 1 , wherein the processing circuitry is further configured to:
configure the transceiver to receive a particular paging message from the eNB, determine whether the particular paging message is related to the EC paging messages, and in response to determining that the particular paging message is related to the EC paging messages, form the combined EC paging message using the particular paging message.

3 . The UE of claim 2 , wherein:
the particular paging message comprises a Paging Radio Network Temporary Identifier (P-RNTI) on a physical downlink control channel (PDCCH), and the processing circuitry is further configured to determine whether the particular paging message is an enhanced coverage (EC) mode paging message or a legacy paging message based on the P-RNTI.

4 . The UE of claim 1 , wherein the processing circuitry is further configured to:
determine that the combined EC paging message has reached a predetermined number of EC paging messages received within a single paging cycle, wherein the EC paging messages within the paging cycle are received in a number of subframes, the number of subframes being specified for EC mode and predetermined in the UE or configured by higher layer signaling.

5 . The UE of claim 1 , wherein the processing circuitry is further configured to:
determine whether the UE is in the EC mode, and configure the transceiver to receive the EC paging messages from the eNB using frequency hopping in response to determining that the UE is in the EC mode, wherein parameters of frequency hopping of the transceiver are predefined in the UE or configured in the UE via higher layer signaling.

6 . The UE of claim 1 , wherein:
a paging cycle of the EC paging messages is over multiple subframes, the EC paging messages within the paging cycle are received in a number of subframes predetermined or configured by higher layer signaling, and at least some of the subframes are non-adjacent.

7 . The UE of claim 1 , wherein the processing circuitry is further configured to:
configure the transceiver to receive the EC paging messages at legacy paging occasions of consecutive paging cycles.

8 . The UE of claim 1 , wherein the processing circuitry is further configured to:
configure the transceiver to receive at least one of the EC paging messages within each paging cycle of consecutive paging cycles.

9 . The UE of claim 1 , wherein the processing circuitry is further configured to:
use at least one of chase combining (CC) and incremental redundancy (IR) to combine the EC paging messages, use of the at least one of CC and IR is predefined in the UE or configured in the UE via higher layer signaling, and when IR is used by the processing circuitry to combine the EC paging messages, a redundancy version (RV) pattern of the IR is predefined in the UE or configured in the UE via higher layer signaling, and the use of CC or IR is determined based on the RV pattern.

10 . The UE of claim 1 , wherein:
the EC paging messages comprise an initial paging message and at least one retransmission of the initial paging message, and the processing circuitry is further configured to determine whether a particular paging message is the initial paging message or the at least one retransmission of the initial paging message.

11 . The UE of claim 10 , wherein the processing circuitry is further configured to:
determine retransmission spacing of the EC paging messages; and determine whether to maintain a buffer during idle sleep periods of the UE dependent on the retransmission spacing.

12 . The UE of claim 1 , wherein:
the EC paging messages comprise an initial paging message and at least one retransmission of the initial paging message, each of the EC paging messages comprises a Paging Radio Network Temporary Identifier (P-RNTI) on a physical downlink control channel (PDCCH), and the processing circuitry is further configured to determine whether a particular paging message is the initial paging message or the at least one retransmission of the initial paging message based on the P-RNTI.

13 . The UE of claim 1 , wherein the processing circuitry is further configured to:
determine whether each paging message is an enhanced coverage (EC) mode paging message or a legacy paging message based on a position of the paging message in a paging cycle.

14 . The UE of claim 1 , wherein the processing circuitry is further configured to:
receive the EC paging messages from the eNB on legacy paging occasions rather than non-legacy paging occasions.

15 . The UE of claim 1 , wherein the processing circuitry is further configured to:
determine that the UE is in an EC mode in response to determining that a link budget between the eNB and the UE is worse than a predetermined link budget.

16 . The UE of claim 15 , wherein the processing circuitry is configured to:
determine a predetermined number of EC paging messages to meet the link budget between the eNB and the UE, and decode the combined EC paging message in response to combining the predetermined number of EC paging messages.

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

18 . An apparatus of an evolved Node-B (eNB) comprising:
processing circuitry configured to:
determine whether user equipment (UE) attached to the eNB is in enhanced coverage (EC) mode; and
configure a transceiver to transmit multiple paging messages to the UE over at least one paging cycle in response to determining that the UE is in EC mode,
wherein successive ones of the paging messages are either the same or incrementally different.

19 . The apparatus of claim 18 , wherein the processing circuitry is further configured to:
configure the transceiver to transmit the paging messages on legacy paging occasions of multiple paging cycles, or configure the transceiver to transmit the paging messages on non-legacy paging occasions within at least one paging cycle.

20 . The apparatus of claim 18 , wherein the processing circuitry is further configured to:
configure the transceiver to transmit UE paging messages to a plurality of different UEs in at least one occasion of the paging messages.

21 . The apparatus of claim 18 , wherein the processing circuitry is further configured to:
determine a coverage extension level, from a plurality of coverage extension levels, of the UE, and configure the transceiver to transmit a number of paging messages dependent on the coverage extension level of the UE.

22 . The apparatus of claim 18 , wherein the processing circuitry is further configured to at least one of:
configure the transceiver to transmit the paging messages within a single paging cycle using frequency hopping, or configure the transceiver to transmit at least one of the paging messages within each paging cycle of consecutive paging cycles.

23 . The apparatus of claim 18 , wherein the processing circuitry is further configured to:

Assignees

• Burbidge Richard C
• Martinez Tarradell Marta
• Choi Hyung-Nam
• Heo Youn Hyoung
• Xiong Gang
• Chatterjee Debdeep
• Han Seunghee

Inventors

• Burbidge Richard C
• Martinez Tarradell Marta
• Choi Hyung-Nam
• Heo Youn Hyoung
• Xiong Gang
• Chatterjee Debdeep
• Han Seunghee

Classifications

• H04W68/02 Primary

  Arrangements for increasing efficiency of notification or paging channel · CPC title

• H04W68/005

  Transmission of information for alerting of incoming communication · CPC title

• H04W88/06

  adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals · CPC title