US2016113050A1PendingUtilityA1

Network assisted device to device communication

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Assignee: LI HONGGANGPriority: May 9, 2013Filed: Apr 1, 2014Published: Apr 21, 2016
Est. expiryMay 9, 2033(~6.8 yrs left)· nominal 20-yr term from priority
Inventors:Honggang LiQinghua LiAlexey KhoryaevHuaning NiuJong-Kae Fwu
H04W 72/21H04W 72/20H04W 72/56H04W 52/0229Y02D30/70H04W 76/10H04W 72/0453H04W 72/12H04W 76/14H04L 5/006H04W 52/0216H04W 52/0235H04W 24/02H04W 4/70H04L 43/16H04L 27/0008H04W 88/02H04W 52/0209H04L 5/0053H04L 27/362H04W 72/10H04W 76/023H04W 72/0406H04B 7/0617H04W 12/041H04B 7/0417
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Claims

Abstract

A technology for a user equipment (UE) that is operable to communicate in a device to device (D2D) network. A D2D coordinator selection assignment can be determined. A D2D bandwidth allocation request can be received from at least one D2D UE. Bandwidth can be scheduled for the at least one D2D UE. A D2D bandwidth allocation message can be communicated to at least one D2D UE within the D2D network to enable the at least one D2D UE to determine when bandwidth is allocated for the at least one D2D UE to communicate with another D2D UE in the D2D network.

Claims

exact text as granted — not AI-modified
1 . A user equipment (UE) operable to communicate in a device to device (D2D) network, having computer circuitry configured to:
 determine a D2D coordinator selection assignment;   receive a D2D bandwidth allocation request from at least one D2D UE;   schedule bandwidth for the at least one D2D UE; and   communicate a D2D bandwidth allocation message to at least one D2D UE within the D2D network to enable the at least one D2D UE to determine when bandwidth is allocated for the at least one D2D UE to communicate with another D2D UE in the D2D network.   
     
     
         2 . The computer circuitry of  claim 1 , wherein the computer circuitry is further configured to determine the D2D coordinator assignment by receiving the D2D coordinator selection assignment from a previous D2D coordinator or an enhanced node B (eNB). 
     
     
         3 . The computer circuitry of  claim 1 , wherein the computer circuitry is further configured to determine the D2D coordinator selection assignment based on the UE having the highest priority ranking of UEs in the D2D network. 
     
     
         4 . The computer circuitry of  claim 1 , wherein the computer circuitry is further configured to determine the D2D coordinator assignment for a contention. 
     
     
         5 . The computer circuitry of  claim 1 , wherein the computer circuitry is further configured to receive data from a D2D transmitter UE. 
     
     
         6 . The computer circuitry of  claim 1 , wherein the computer circuitry is further configured to schedule bandwidth for the at least one D2D UE based on a priority level of the bandwidth allocation request from the least one D2D UE. 
     
     
         7 . The computer circuitry of  claim 1 , wherein the D2D bandwidth allocation request includes:
 a distinct connection identification (CID) for a link between the D2D coordinator and the at least one D2D UE; and   a size of a D2D bandwidth allocation.   
     
     
         8 . The computer circuitry of  claim 7 , wherein the computer circuitry is further configured to map the CID to a selected randomly determined priority level for the at least one D2D UE. 
     
     
         9 . A user equipment (UE) operable to communicate in a device to device (D2D) network, having computer circuitry configured to:
 transmit a D2D bandwidth allocation request to a D2D coordinator UE;   receive a D2D bandwidth allocation message from the D2D coordinator UE; and   transmit data from the UE to an other D2D UE at a selected time based on information received in the D2D bandwidth allocation message.   
     
     
         10 . The computer circuitry of  claim 9 , wherein the computer circuitry is further configured to transmit the data from the UE to the other D2D UE using a selected power level and for a selected duration of time based on the D2D bandwidth allocation message. 
     
     
         11 . The computer circuitry of  claim 9 , wherein the computer circuitry is further configured to:
 initiate a sleep mode after receiving the D2D bandwidth allocation message;   transmit data to the other D2D UE in the D2D network when a resource allocation starting point is reached; and   reinitiate the sleep mode after transmitting the data to the other D2D UE in the D2D network.   
     
     
         12 . The computer circuitry of  claim 9 , wherein the computer circuitry is further configured to:
 establish a link between the UE and the other D2D UE; and   receive a distinct connection identification (CID) for the link.   
     
     
         13 . The computer circuitry of  claim 12 , wherein the computer circuitry is further configured to establish links with a plurality of other D2D UEs and identify each link based on the CID. 
     
     
         14 . The computer circuitry of  claim 12 , wherein the CID is for a spatial reuse pair of UEs. 
     
     
         15 . The computer circuitry of  claim 9 , wherein the D2D bandwidth allocation request includes:
 a distinct connection identification (CID) for a link between the UE and a D2D receiver UE; and   a size of a D2D bandwidth allocation.   
     
     
         16 . The computer circuitry of  claim 15 , wherein the computer circuitry is further configured to map the CID to a selected randomly determined priority level for the UE. 
     
     
         17 . The computer circuitry of  claim 9 , wherein the computer circuitry is further configured to:
 receive a reference signal from the other D2D UE during an allocation period received from the D2D coordinator UE; and   use the reference signal for channel estimation, timing synchronization, frequency synchronization, power control, link adaptation, or MIMO feedback.   
     
     
         18 . The computer circuitry of  claim 9 , wherein the computer circuitry is further configured to:
 transmit data from the UE to a plurality of other D2D UEs at a selected time, for a selected time duration, or on a selected channel, based on information received in the D2D bandwidth allocation message.   
     
     
         19 . A user equipment (UE) operable to communicate in a device to device (D2D) network, having computer circuitry configured to:
 receive a D2D bandwidth allocation message from a D2D coordinator UE;   identify reception information for receiving data from another D2D UE in the D2D network using the bandwidth allocation message; and   receive the data from the other D2D UE using the reception information.   
     
     
         20 . The computer circuitry of  claim 19 , wherein the reception information includes a selected channel or a time duration for receiving the data. 
     
     
         21 . The computer circuitry of  claim 19 , wherein the computer circuitry is further configured to receive a D2D coordinator selection assignment from a D2D coordinator UE or an enhanced node B (eNB). 
     
     
         22 . The computer circuitry of  claim 19 , wherein the computer circuitry is further configured to:
 initiate a sleep mode after receiving the D2D bandwidth allocation message;   receive data from the other D2D UE in the D2D network at a resource allocation starting point; and   reinitiate the sleep mode after receiving the data from the other D2D UE in the D2D network.   
     
     
         23 . The computer circuitry of  claim 19 , wherein the computer circuitry is further configured to:
 receive a feedback signal from the other D2D UE during the time period,   wherein the feedback signal includes a channel estimation, a timing synchronization, a frequency synchronization, a channel quality indication, a power control, a link adaptation, or a MIMO feedback.   
     
     
         24 . A method for coordinating device to device (D2D) communication, comprising:
 receiving a D2D coordinator selection assignment at a D2D coordinator UE;   receiving a D2D bandwidth allocation request from a plurality of D2D transmitter UEs at the D2D coordinator UE;   scheduling a bandwidth allocation for each of a plurality of D2D UEs; and   communicating a D2D bandwidth allocation message to the plurality of D2D UEs within the D2D network, wherein D2D bandwidth allocation message enables the plurality of D2D UEs to determine the bandwidth allocation for each of the D2D UEs to communicate with at least one other D2D UE in the D2D network.   
     
     
         25 . The method of  claim 24 , wherein a size of the bandwidth allocation scheduled for a D2D UE in the plurality of D2D UEs is different than a size of the bandwidth allocation scheduled for another D2D UE of the plurality of D2D UEs. 
     
     
         26 . The method of  claim 25 , wherein the size of the bandwidth allocation scheduled for the D2D UE is variable. 
     
     
         27 . The method of  claim 24 , further comprising scheduling more than one of the plurality of D2D UEs for a substantially same bandwidth allocation using spatial reuse. 
     
     
         28 . The method of  claim 24 , further comprising scheduling a bandwidth allocation for each of a plurality of D2D UEs based on a priority level of each bandwidth request. 
     
     
         29 . The method of  claim 24 , further comprising synchronizing a time and frequency of the plurality of UEs with an enhanced node B (eNB) or the D2D coordinator UE. 
     
     
         30 . The method of  claim 24 , further comprising:
 selecting a D2D UE to be a next D2D coordinator UE after a selected period of time has lapsed; and   transmitting a D2D coordinator UE assignment to the selected D2D UE.

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