RSRP mobility state estimation for cellular device

• US 9,591,581 B2
• Filed: 09/27/2013
• Issued: 03/07/2017
• Est. Priority Date: 09/28/2012
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Intel Corporation
• Inventors: Yiu, Candy, Chiang, Chia-Yang, Zhang, Yujian, Heo, Youn Hyoung, Fong, Mo-Han
• Primary Examiner(s): HAMMONDS, MARCUS C
• Application Number:
  US14/127,830
• Publication Number:
  US 20150223050A1
• Time in Patent Office: 1,257 Days
• Field of Search: 455/434
• US Class Current: 1/1
• CPC Class Codes: H04B 17/318 Received signal strength
• CPC Class Codes: H04J 11/00 Orthogonal multiplex systems, e.g. using WALSH codesH04J13/00 takes precedence
• CPC Class Codes: H04J 11/0086 Search parameters, e.g. search strategy, accumulation length, range of search, thresholds code acquisition in DSSS H04B1/7075
• CPC Class Codes: H04J 3/1694 Allocation of channels in TDM/TDMA networks, e.g. distributed multiplexers Passive Optical Networks H04Q11/0062
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04L 1/1864 ARQ related signaling H04L1/1607 takes precedence
• CPC Class Codes: H04L 1/1893 Physical mapping arrangements physical resource mapping in general H04L5/00
• CPC Class Codes: H04L 41/069 using logs of notifications; Post-processing of notifications
• CPC Class Codes: H04L 41/5032 Generating service level reports
• CPC Class Codes: H04L 43/16 Threshold monitoring
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04L 5/0057 Physical resource allocation for CQI
• CPC Class Codes: H04L 5/0073 Allocation arrangements that take into account other cell interferences for intercell interference mitigation or co-ordination in orthogonal multiplex systems H04J11/005
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04L 65/60 Network streaming of media packets
• CPC Class Codes: H04L 65/612 for unicast
• CPC Class Codes: H04L 65/65 : Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP]
• CPC Class Codes: H04L 65/762 : at the source reformatting of additional data in video distribution servers H04N21/2355
• CPC Class Codes: H04L 67/10 : in which an application is distributed across nodes in the network software deployment G06F8/60; multiprogramming arrangements G06F9/46
• CPC Class Codes: H04W 24/02 : Arrangements for optimising operational condition
• CPC Class Codes: H04W 24/08 : Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 24/10 : Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 28/0205 : at the air interface dynamic wireless traffic scheduling H04W72/12
• CPC Class Codes: H04W 28/0215 : based on user or device properties, e.g. MTC-capable devices services for machine-to-machine communication [M2M] or machine type communication [MTC] H04W4/70; wireless resource selection or allocation plan definition based on terminal or device properties H04W72/51
• CPC Class Codes: H04W 28/0221 : power availability or consumption
• CPC Class Codes: H04W 28/0252 : per individual bearer or channel dynamic wireless traffic scheduling H04W72/12
• CPC Class Codes: H04W 28/0268 : using specific QoS parameters for wireless networks, e.g. QoS class identifier [QCI] or guaranteed bit rate [GBR] negotiating SLA or negotiating QoS H04W28/24
• CPC Class Codes: H04W 28/16 : Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
• CPC Class Codes: H04W 36/0061 : of neighbour cell information
• CPC Class Codes: H04W 36/0066 : of control information between different types of networks in order to establish a new radio link in the target network
• CPC Class Codes: H04W 36/0083 : Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
• CPC Class Codes: H04W 36/0085 : Hand-off measurements
• CPC Class Codes: H04W 36/0088 : Scheduling hand-off measurements
• CPC Class Codes: H04W 36/22 : for handling the traffic
• CPC Class Codes: H04W 4/70 : Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 40/005 : Routing actions in the presence of nodes in sleep or doze mode
• CPC Class Codes: H04W 40/246 : Connectivity information discovery
• CPC Class Codes: H04W 48/14 : using user query or user detection
• CPC Class Codes: H04W 48/16 : Discovering, processing access restriction or access information
• CPC Class Codes: H04W 48/18 : Selecting a network or a communication service
• CPC Class Codes: H04W 48/20 : Selecting an access point
• CPC Class Codes: H04W 52/0209 : in terminal devices terminal devices per se H04W88/02
• CPC Class Codes: H04W 52/0212 : managed by the network, e.g. network or access point is master and terminal is slave
• CPC Class Codes: H04W 52/0225 : using monitoring of external events, e.g. the presence of a signal
• CPC Class Codes: H04W 52/0235 : where the received signal is a power saving command
• CPC Class Codes: H04W 52/0258 : controlling an operation mode according to history or models of usage information, e.g. activity schedule or time of day
• CPC Class Codes: H04W 52/0261 : managing power supply demand, e.g. depending on battery level
• CPC Class Codes: H04W 52/04 : TPC
• CPC Class Codes: H04W 52/14 : Separate analysis of uplink or downlink
• CPC Class Codes: H04W 72/02 : Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 72/044 : based on the type of the allocated resource
• CPC Class Codes: H04W 72/0453 : Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/20 : Control channels or signalling for resource management
• CPC Class Codes: H04W 72/21 : in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 : in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/30 : Resource management for broadcast services
• CPC Class Codes: H04W 72/52 : based on load
• CPC Class Codes: H04W 72/541 : using the level of interference
• CPC Class Codes: H04W 74/002 : Transmission of channel access control information
• CPC Class Codes: H04W 74/004 : in the uplink, i.e. towards network
• CPC Class Codes: H04W 76/12 : Setup of transport tunnels
• CPC Class Codes: H04W 76/15 : Setup of multiple wireless link connections
• CPC Class Codes: H04W 76/16 : Involving different core network technologies, e.g. a packet-switched [PS] bearer in combination with a circuit-switched [CS] bearer
• CPC Class Codes: H04W 76/23 : Manipulation of direct-mode connections
• CPC Class Codes: H04W 76/27 : Transitions between radio resource control [RRC] states
• CPC Class Codes: H04W 76/28 : Discontinuous transmission [DTX]; Discontinuous reception [DRX]
• CPC Class Codes: H04W 76/30 : Connection release
• CPC Class Codes: H04W 8/08 : Mobility data transfer
• CPC Class Codes: H04W 80/10 : adapted for application session management, e.g. SIP [Session Initiation Protocol] connection management H04W76/00; arrangements for session management H04L67/14
• CPC Class Codes: H04W 84/042 : Public Land Mobile systems, e.g. cellular systems
• CPC Class Codes: H04W 84/12 : WLAN [Wireless Local Area Networks]
• CPC Class Codes: H04W 88/02 : Terminal devices
• CPC Class Codes: H04W 88/06 : adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
• CPC Class Codes: H04W 88/08 : Access point devices
• CPC Class Codes: H04W 88/12 : Access point controller devices
• CPC Class Codes: H04W 88/14 : Backbone network devices
• CPC Class Codes: H04W 88/16 : Gateway arrangements
• CPC Class Codes: H04W 88/18 : Service support devices; Network management devices
• CPC Class Codes: Y02D 30/70 : in wireless communication networks

Abstract

Generally discussed herein are systems and apparatuses that can implement a Mobility State Estimation (MSE) of a User Equipment (UE) and techniques for using the MSE algorithms. According to an example technique to determine the MSE of a UE can include determining, using the UE, a maximum Reference Signal Received Power (RSRP) within a cell, determining, using the UE, a minimum RSRP within the cell, determining, using the UE, a difference between the maximum and minimum RSRP, and determining, using the UE, an MSE of the UE as a function of the determined difference.

Claims

1. A User Equipment (UE) comprising:

a memory including instructions stored thereon, and

a processor configured to execute the instructions, wherein the instructions, which when executed by the processor, cause the processor to perform operations to;

receive a specified weight from an eNodeB of a first cell, the specified weight based on at least one chosen from the group consisting of a path loss and a size of the cell;

determine a maximum Reference Signal Received Power (RSRP) within the first cell;

determine a minimum RSRP within the first cell;

determine a difference between the maximum and minimum RSRP;

multiply the determined difference by the specified weight to produce an RSRP weighted difference;

determine a Mobility State Estimation (MSE) of the UE as a function of the RSRP weighted difference; and

initiate a handover to a second cell at a time determined based on the determined MSE, wherein executing the handover occurs at an earlier time in response to determining the MSE of the UE is a high mobility state as compared to determining the MSE of the UE is a normal or low mobility state.

2. The UE of claim 1, wherein the memory further includes instructions, which when executed by the processor, cause the processor to perform operations to:

determine if the RSRP weighted difference is greater than a predetermined first threshold;

in response to determining the RSRP weighted difference is greater than the first threshold, determine the MSE of the UE is a high mobility; and

in response to determining the RSRP weighted difference is not greater than the first threshold, determine the MSE of the UE is a normal mobility.

3. The UE of claim 2, wherein the memory further includes instructions, which when executed by the processor, cause the processor to perform operations to:

determine if the RSRP weighted difference is greater than a predetermined second threshold, wherein the second threshold is less than the first threshold; and

in response to determining the RSRP weighted difference is greater than the second threshold and the determined difference is not greater than the first threshold, determine the MSE of the UE is a medium mobility; and

wherein the instructions for determining the MSE of the UE is a normal mobility, further include instructions for, in response to determining the RSRP weighted difference is not greater than the second threshold, determine the MSE of the UE is a normal mobility.

4. The UE of claim 1, wherein the memory further includes instructions, which when executed by the processor, cause the processor to perform operations to:

look up the determined RSRP difference in a table to obtain a corresponding substitute RSRP value; and

wherein the instructions for determining an MSE of the UE as a function of the determined difference include instructions for determining the MSE as a function of the substitute RSRP value.

5. The UE of claim 4, wherein the memory further includes instructions, which when executed by the processor, cause the processor to perform operations to:

multiply the substitute RSRP value by the specified weight to produce the RSRP weighted difference.

6. The UE of claim 1, wherein the maximum RSRP of the first cell is a first maximum RSRP, the minimum RSRP of the first cell is a first minimum RSRP, the difference between maximum and the minimum RSRP is a first difference, and the RSRP weighted difference is a first RSRP weighted difference, and the memory further includes instructions, which when executed by the processor, cause the processor to perform operations to:

determine a second maximum Reference Signal Received Power (RSRP) within a third cell;

determine a second minimum RSRP within the third cell;

determine a second difference between the second maximum and the second minimum RSRP;

multiply the second difference by another specified weight to create a second RSRP weighted difference; and

sum the first RSRP weighted difference and the second RSRP weighted difference to create an RSRP weighted difference total;

wherein the instructions for determining the MSE of the UE include instructions for determining the MSE as a function of the RSRP weighted difference total.

7. The UE of claim 1, wherein the maximum RSRP of the first cell is a first maximum RSRP, the minimum RSRP of the first cell is a first minimum RSRP, and the difference between maximum and the minimum RSRP is a first difference, and the memory further includes instructions, which when executed by the processor, cause the processor to perform operations to:

determine a second maximum Reference Signal Received Power (RSRP) within a third cell;

determine a second minimum RSRP within the third cell;

determine a second difference between the second maximum and the second minimum RSRP;

look up a first value in a look up table based on the first difference, the look up table organized according to cell size and RSRP difference, wherein a range of RSRP differences map to a single value in the look up table;

wherein the instructions for multiplying the first difference by the specified weight include multiplying the first value by the specified weight to produce a first weighted value;

look up a second value in the look up table based on the second difference;

multiply the second value by a another specified weight to produce a second weighted value;

sum the first weighted value and the second weighted value to create an RSRP weighted value total; and

wherein the instructions for determining the MSE of the UE include instructions for determining the MSE as a function of the RSRP weighted value total.

8. The UE of claim 1, wherein the maximum RSRP of the first cell is a first maximum RSRP, the minimum RSRP of the first cell is a first minimum RSRP, and the difference between maximum and the minimum RSRP is a first different, and the memory further includes instructions, which when executed by the processor, cause the processor to perform operations to:

compare the first difference to a first threshold value and setting a first weight to a first specified value in response to determining the first difference is less than the first threshold value;

in response to determining the first difference is greater than the first threshold, compare the first difference to a second threshold value greater than the first threshold value, and setting the first weight to a second specified value greater than the first specified value in response to determining the first difference is less than the second threshold value;

in response to determining the first difference is greater than the second threshold value, set the first weight to a third specified value greater than the second specified value;

determine a second maximum RSRP within a third cell;

determine a second minimum RSRP within the third cell;

determine a second difference between the second maximum and the second minimum RSRP;

compare the second difference to the first threshold value and setting a second weight to the first specified value in response to determining the first difference is less than the first threshold value;

in response to determining the second difference is greater than the first threshold, compare the second difference to the second threshold value, and set the second weight to the second specified value in response to determining the second difference is less than the second threshold value;

in response to determining the second difference is greater than the second threshold value, set the second weight to a third specified value;

sum the first and second weights; and

wherein the instructions for determining the MSE of the UE include instructions for determining the MSE as a function of the summed weights.

9. A method for determining a Mobility State Estimation (MSE) of a User Equipment (UE), the method comprising:

receiving, at the UE, a specified weight from an eNodeB of a first cell, the specified weight determined as function of at least one chosen from the group consisting of a path loss and a size of the cell;

determining, using the UE, a maximum Reference Signal Received Power (RSRP) within a first cell;

determining, using the UE, a minimum RSRP within the first cell;

determining, using the UE, a difference between the maximum and minimum RSRP;

multiplying the determined difference by the specified weight to produce an RSRP weighted difference;

determining, using the UE, an MSE of the UE as a function of the RSRP weighted difference; and

initiating a handover to a second cell at a time determined based on the determined MSE, wherein executing the handover occurs at an earlier time in response to determining the MSE of the UE is a high mobility state as compared to determining the MSE of the UE is a normal or low mobility state.

10. The method of claim 9, further comprising:

determining, using the UE, if the RSRP weighted difference is greater than a predetermined first threshold;

in response to determining the RSRP weighted difference is greater than the first threshold, determining, using the UE, the MSE of the UE is a high mobility; and

in response to determining the RSRP weighted difference is not greater than the first threshold, determining, using the UE, the MSE of the UE is a normal mobility.

11. The method of claim 10, further comprising:

determining if the RSRP weighted difference is greater than a predetermined second threshold, wherein the second threshold is less than the first threshold; and

in response to determining the RSRP weighted difference is greater than the second threshold and the determined difference is not greater than the first threshold, determining the MSE of the UE is a medium mobility; and

wherein determining the MSE of the UE is a normal mobility, further includes, in response to determining the RSRP weighted difference is not greater than the second threshold, determining the MSE of the UE is a normal mobility.

12. The method of claim 9, further comprising looking up the determined RSRP difference in a table to obtain a substitute RSRP value;

and

wherein determining an MSE of the UE as a function of the RSRP weighted difference includes determining the MSE as a function of the substitute RSRP value.

13. The method of claim 12, further comprising:

multiplying the substitute RSRP value by the specified weight to produce the RSRP weighted difference.

14. A non-transitory computer readable storage device comprising instructions stored thereon, the instructions, which when executed by a machine, cause the machine to perform operations to:

receive a specified weight from an eNodeB of a first cell, the specified weight based on at least one chosen from the group consisting of a path loss and a size of the cell;

determine a maximum Reference Signal Received Power (RSRP) within a first cell;

determine a minimum RSRP within the first cell;

determine a difference between the maximum and minimum RSRP;

multiply the determined difference by the specified weight to produce an RSRP weighted difference;

determine a Mobility State Estimation (MSE) as a function of the RSRP weighted difference; and

initiate a handover to a second cell at a time determined based on the determined MSE, wherein executing the handover occurs at an earlier time in response to determining the MSE of the UE is a high mobility state as compared to determining the MSE of the UE is a normal or low mobility state.

15. The storage device of claim 14, further comprising instructions stored thereon, which when executed by the machine, cause the machine to further perform operations to:

determine if the RSRP weighted difference is greater than a predetermined first threshold;

in response to determining the RSRP weighted difference is greater than the first threshold determine the MSE is a high mobility; and

in response to determining the RSRP weighted difference is not greater than the first threshold determine the MSE is a normal mobility.

16. The storage device of claim 15, further comprising instructions stored thereon, which when executed by the machine, cause the machine to further perform operations to:

determine if the RSRP weighted difference is greater than a predetermined second threshold, wherein the second threshold is less than the first threshold; and

in response to determining the RSRP weighted difference is greater than the second threshold and the determined difference is not greater than the first threshold, determine the MSE is a medium mobility; and

wherein the instructions for determining the MSE is a normal mobility, further include instructions for, in response to determining the RSRP weighted difference is not greater than the second threshold, determine the MSE is a normal mobility.

17. The storage device of claim 16, further comprising instructions stored thereon, which when executed by the machine, cause the machine to further perform operations to:

look up the determined RSRP difference in a table to obtain a substitute RSRP value; and

wherein the instructions for determining an MSE as a function of the determined difference include instructions for determining the MSE as a function of the substitute RSRP value.

18. A system comprising:

an antenna;

a radio transceiver communicatively coupled to the antenna; and

a User Equipment (UE) comprising;

a memory including instructions stored thereon, and

a processor configured to execute the instructions, wherein the instructions, which when executed by the processor, cause the processor to perform operations to;

receive a specified weight from an eNodeB of a first cell, the specified weight based on at least one chosen from the group consisting of a path loss and a size of the cell;

determine a maximum Reference Signal Received Power (RSRP) of a plurality of plurality of signals received within the first cell, each of the signals received through the antenna and the transceiver;

determine a minimum RSRP within the cell of the plurality of signals received within the first cell;

determine a difference between the maximum and minimum RSRP;

multiply the determined difference by the specified weight to produce an RSRP weighted difference;

determine a Mobility State Estimation (MSE) of the UE as a function of the RSRP weighted difference; and

initiate a handover to a second cell at a time determined based on the determined MSE, wherein executing the handover occurs at an earlier time in response to determining the MSE of the UE is a high mobility state as compared to determining the MSE of the UE is a normal or low mobility state.

19. The system of claim 18, wherein the memory further includes instructions, which when executed by the processor, cause the processor to perform operations to:

determine if the RSRP weighted difference is greater than a predetermined first threshold;

in response to determining the RSRP weighted difference is greater than the first threshold, determine the MSE of the UE is a high mobility; and

in response to determining the RSRP weighted difference is not greater than the first threshold, determine the MSE of the UE is a normal mobility.

20. The system of claim 19, wherein the memory further includes instructions, which when executed by the processor, cause the processor to perform operations to:

determine if the RSRP weighted difference is greater than a predetermined second threshold, wherein the second threshold is less than the first threshold; and

in response to determining the RSRP weighted difference is greater than the second threshold and the determined difference is not greater than the first threshold, determine the MSE of the UE is a medium mobility; and

wherein the instructions for determining the MSE of the UE is a normal mobility, further include instructions for, in response to determining the RSRP weighted difference is not greater than the second threshold, determine the MSE of the UE is a normal mobility.