Method and wireless device for managing resources for D2D communication

• US 10,602,554 B2
• Filed: 08/22/2013
• Issued: 03/24/2020
• Est. Priority Date: 04/10/2013
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Wanstedt, Stefan, Lu, Qianxi, Parkvall, Stefan, Sorrentino, Stefano
• Primary Examiner(s): Cho, Un C
• Assistant Examiner(s): Perez, Jose L
• Application Number:
  US14/114,758
• Publication Number:
  US 20140307642A1
• Time in Patent Office: 2,406 Days
• Field of Search: 370329
• CPC Class Codes: H04L 5/0012 Hopping in multicarrier systems for frequency hopping in spread spectrum systems H04B1/713
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0066 Requirements on out-of-channel emissions
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04W 28/26 Resource reservation
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 76/14 Direct-mode setup

Abstract

A method and a wireless device (110) for managing a set of resources for transmission of data to a further wireless device (120) using D2D communication are disclosed. The wireless device (110) and the further wireless device (120) are capable of being operated in a mixed cellular and D2D radio network (100). The set of resources are comprised in a cellular spectrum of the mixed cellular and D2D radio network (100). The wireless device (110) selects, from among the set of resources, a sub set of resources for the transmission of data according to a hopping algorithm for distribution of the sub set of resources among the set of resources. Then, the wireless device (110) sends a scheduling command to the further wireless device (120). The scheduling command indicates the selected sub set of resources. The wireless device (110) sends the data to the further wireless device (120) on the selected sub set of resources using D2D communication.

Claims

1. A method, performed by a wireless device, for managing a set of resources for transmission of data to a further wireless device using Device-to-Device (D2D) communication, wherein the wireless device and the further wireless device are configured for operation in a mixed cellular and D2D radio network, wherein the set of resources are comprised in a cellular spectrum of the mixed cellular and D2D radio network, wherein the set of resources comprises a first group of resources and a second group of resources, and wherein the method comprises:

determining that the first group of resources is less occupied compared to the second group of resources by detecting energy at the first and second groups of resources;

selecting, from among the set of resources, a subset of resources for the transmission of data according to a hopping algorithm for distribution of the subset of resources among the set of resources, wherein the selecting of the subset of resources comprises selecting the subset of resources from among the first group of resources, according to the hopping algorithm;

sending a scheduling command to the further wireless device, wherein the scheduling command indicates the selected subset of resources according to a scrambling code used for the scheduling command, wherein a mapping from the scrambling code to the hopping algorithm enables the further wireless device to identify the selected subset of resources; and

sending the data to the further wireless device on the selected subset of resources using the D2D communication.

2. The method according to claim 1, wherein the determining is further performed by:

detecting respective hopping algorithms from any existing transmissions in the first and second groups of resources.

3. The method according to claim 1, wherein the D2D communication is an underlay to the mixed cellular and D2D radio network.

4. A wireless device configured to manage a set of resources for transmission of data to a further wireless device using Device-to-Device (D2D) communication, wherein the wireless device and the further wireless device are configured for operation in a mixed cellular and D2D radio network, wherein the set of resources are comprised in a cellular spectrum of the mixed cellular and D2D radio network, wherein the set of resources comprises a first group of resources and a second group of resources, and wherein the wireless device comprises a processing circuit configured to:

determine that the first group of resources is less occupied compared to the second group of resources by detection of energy at the first and second groups of resources;

select, from among the set of resources, a subset of resources for the transmission of data according to a hopping algorithm for distribution of the subset of resources among the set of resources, wherein, to select the subset of resources, the processing circuit is configured to select the subset of resources from among the first group of resources, according to the hopping algorithm;

send a scheduling command to the further wireless device, wherein the scheduling command indicates the selected subset of resources according to;

a scrambling code used for the scheduling command, wherein a mapping from the scrambling code to the hopping algorithm enables the further wireless device to identify the selected subset of resources;

and

send the data to the further wireless device on the selected subset of resources using the D2D communication.

5. The wireless device according to claim 4, wherein, to determine that the first group of resources is less occupied compared to the second group of resources, the processing circuit is further configured to detect:

respective hopping algorithms from any existing transmissions in the first and second groups of resources.

6. The wireless device according to claim 4, wherein the D2D communication is an underlay to the mixed cellular and D2D radio network.