# US 12,004,221 B2 · Truncated identification indicators for early user equipment (UE) capability retrieval

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- Number: US 12,004,221 B2
- Document ID: US12004221B2
- Status: Granted
- Kind: B2
- Application number: 17/326,229
- Filed: 2021-05-20
- Published: 2021-11-25
- Granted: 2024-06-04
- Earliest claimed: 2020-05-21
- Assignees: QUALCOMM Incorporated
- Applicants: QUALCOMM Incorporated
- Inventors: Prasad Reddy Kadiri; Bharat Shrestha; Mungal Singh Dhanda; Umesh Phuyal
- Web page: https://patentgrep.com/patent/US12004221B2

## CPC

- H04W 8/24: Transfer of terminal data
- H04W 76/10: Connection setup
- H04L 5/0044: {Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH}
- H04W 8/02: Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
- H04W 8/245: {from a network towards a terminal}
- H04W 60/00: Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
- H04W 74/0833: Random access procedures, e.g. with 4-step access
- H04W 76/11: Allocation or use of connection identifiers
- H04W 8/26: Network addressing or numbering for mobility support
- H04W 88/02: Terminal devices
- H04W 88/08: Access point devices
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

A base-station (BS) receiving a random access request from user equipment (a UE), followed by a connection request. The connection request contains UE identity information which may have one of multiple formats depending on whether the access request and/or the connection request indicate that the UE is operating as a bandwidth-limited (BL) UE, an enhanced coverage (CE) UE, or a UE that operates in neither the BL mode nor the CE mode. In the BL mode, the UE may transmit a truncated identifier that is sufficient for the BS to retrieve capability information for the UE prior to transmitting a resource grant to the UE. The BS may then configure the UE and BS to using a radio configuration optimized for the UE's capabilities and transmit the resource grant in accordance with the optimized configuration.

## Claims

### Claim 1

A method for wireless communication performed at a user equipment (UE) the method comprising:
receiving truncation instructions;
generating a truncated identifier based on the truncation instructions and based on a UE type of the UE, wherein the truncated identifier is indicative of the UE type of the UE;
transmitting, in a first connection request, the truncated identifier; and
communicating using a communication configuration associated with the UE type indicated by the truncated identifier.

### Claim 2 (depends on 1)

The method of claim 1, further comprising:
receiving RRC configuration information via a signaling radio bearer (SRB), the SRB being configured according to the UE type indicated by the truncated identifier.

### Claim 3 (depends on 1)

The method of claim 1, wherein the truncated identifier comprises at least one of truncated access and mobility management function (AMF) information or part of a temporary mobile subscriber identity (TMSI) of the UE.

### Claim 4 (depends on 1)

The method of claim 1,
wherein the UE type is a bandwidth-limited (BL) UE type.

### Claim 5 (depends on 1)

The method of claim 1, wherein the truncation instructions include a first value n and a second value m; and
wherein the truncated identifier has a length N and includes:
a number corresponding to the first value n of least significant bits (LSBs) of an access and mobility management function (AMF) set ID;
a number corresponding to the second value m of least significant bits (LSBs) of an AMF pointer; and
a number corresponding to (N−n−m) of LSBs of a temporary mobile subscriber identity (TMSI) of the UE.

### Claim 6 (depends on 5)

The method of claim 5,
wherein N is equal to 40 and (n+m) is equal to at least 8.

### Claim 7 (depends on 1)

The method of claim 1, wherein the truncated identifier comprises 39 LSBs of a 5G-S-TMSI of the UE and a UE identifier (UEID) type indicator bit having a value corresponding to a non-bandwidth-limited (non-BL) enhanced coverage UE type (a CE UE type).

### Claim 8 (depends on 1)

The method of claim 1, wherein receiving the truncation instructions comprises receiving a system information block (SIB) including the truncation instructions.

### Claim 9 (depends on 1)

The method of claim 1, wherein transmitting the truncated identifier comprises:
transmitting the truncated identifier generated based on the truncation instructions, based on a UE identifier (UEID) of the UE, and based on the UE type of the UE.

### Claim 10 (depends on 1)

The method of claim 1, wherein the first connection request is a radio resource control (RRC) connection request message.

### Claim 11 (depends on 1)

The method of claim 1, wherein communicating using the communication configuration associated with the UE type indicated by the truncated identifier comprises:
communicating using the communication configuration based on UE capabilities associated with an access and mobility management function (AMF) for the UE type indicated by the truncated identifier.

### Claim 12 (depends on 11)

The method of claim 11, wherein the first connection request is a radio resource control (RRC) connection request message of a random access procedure, and wherein communicating using the communication configuration based on the UE capabilities associated with the AMF comprises:
communicating, prior to sending an RRC connection setup complete message of the random access procedure, using the communication configuration based on the UE capabilities associated with the AMF for the UE type indicated by the truncated identifier.

### Claim 13

A user equipment (UE), comprising:
at least one processor;
at least one memory comprising instructions; and
a transceiver;
wherein the at least one processor is configured to execute the instructions to cause the UE to:
receive, via the transceiver, truncation instructions;
generate a truncated identifier based on the truncation instructions and based on a UE type of the UE, wherein the truncated identifier is indicative of the UE type of the UE;
transmit, via the transceiver to a base station (BS), in a first connection request, the truncated identifier; and
communicate with the BS via the transceiver using a communication configuration associated with the UE type indicated by the truncated identifier.

### Claim 14 (depends on 13)

The UE of claim 13, wherein the at least one processor is further configured to cause the UE to:
receive, via the transceiver, RRC configuration information via a signaling radio bearer (SRB), the SRB being configured according to the UE type indicated by the truncated identifier.

### Claim 15 (depends on 13)

The UE of claim 13, wherein the truncated identifier comprises at least one of truncated access and mobility management function (AMF) information or part of a temporary mobile subscriber identity (TMSI) of the UE.

### Claim 16 (depends on 13)

The UE of claim 13, wherein the truncation instructions include a first value n and a second value m; and
wherein the truncated identifier has a length N and includes:
a number corresponding to the first value n of least significant bits (LSBs) of an access and mobility management function (AMF) set ID;
a number corresponding to the second value m of least significant bits (LSBs) of an AMF pointer; and
a number corresponding to (N−n−m) of LSBs of a temporary mobile subscriber identity (TMSI) of the UE.

### Claim 17 (depends on 13)

The UE of claim 13, wherein the truncated identifier comprises 39 LSBs of a 5G-S-TMSI of the UE and a UE identifier (UEID) type indicator bit having a value corresponding to a non-bandwidth-limited (non-BL) enhanced coverage UE type (a CE UE type).

### Claim 18 (depends on 13)

The UE of claim 13, wherein the UE type is a bandwidth-limited (BL) UE type.

### Claim 19 (depends on 13)

The UE of claim 13, wherein to transmit the truncated identifier, the at least one processor is further configured to cause the UE to:
transmit, via the transceiver, the truncated identifier generated based on the truncation instructions, based on a UE identifier (UEID) of the UE, and based on the UE type of the UE.

### Claim 20 (depends on 13)

The UE of claim 13, wherein the first connection request is a radio resource control (RRC) connection request message.

### Claim 21 (depends on 13)

The UE of claim 13, wherein to communicate using the communication configuration associated with the UE type indicated by the truncated identifier, the at least one processor is further configured to cause the UE to:
communicate with the BS via the transceiver using the communication configuration based on UE capabilities associated with an access and mobility management function (AMF) for the UE type indicated by the truncated identifier.

### Claim 22 (depends on 21)

The UE of claim 21, wherein the first connection request is a radio resource control (RRC) connection request message or a random access procedure, and wherein to communicate with the BS using the communication configuration based on the UE capabilities associated with the AMF, the at least one processor is further configured to cause the UE to:
communicate with the BS via the transceiver, prior to sending an RRC connection setup complete message of the random access procedure, using the communication configuration based on the UE capabilities associated with the AMF for the UE type indicated by the truncated identifier.

### Claim 23 (depends on 13)

The UE of claim 13, wherein to receive the truncation instructions, the at least one processor is further configured to cause the UE to:
receive, via the transceiver, a system information block (SIB) including the truncation instructions.